readelf.c

/*-
 * Copyright (c) 2009-2015 Kai Wang
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/param.h>
#include <sys/queue.h>

#include <ar.h>
#include <assert.h>
#include <capsicum_helpers.h>
#include <ctype.h>
#include <dwarf.h>
#include <err.h>
#include <fcntl.h>
#include <gelf.h>
#include <getopt.h>
#include <libdwarf.h>
#include <libelftc.h>
#include <libgen.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <zlib.h>

#include <libcasper.h>
#include <casper/cap_fileargs.h>

#include "_elftc.h"

ELFTC_VCSID("$Id: readelf.c 3769 2019-06-29 15:15:02Z emaste $");

/* Backwards compatability for older FreeBSD releases. */
#ifndef	STB_GNU_UNIQUE
#define	STB_GNU_UNIQUE 10
#endif
#ifndef	STT_SPARC_REGISTER
#define	STT_SPARC_REGISTER 13
#endif


/*
 * readelf(1) options.
 */
#define	RE_AA	0x00000001
#define	RE_C	0x00000002
#define	RE_DD	0x00000004
#define	RE_D	0x00000008
#define	RE_G	0x00000010
#define	RE_H	0x00000020
#define	RE_II	0x00000040
#define	RE_I	0x00000080
#define	RE_L	0x00000100
#define	RE_NN	0x00000200
#define	RE_N	0x00000400
#define	RE_P	0x00000800
#define	RE_R	0x00001000
#define	RE_SS	0x00002000
#define	RE_S	0x00004000
#define	RE_T	0x00008000
#define	RE_U	0x00010000
#define	RE_VV	0x00020000
#define	RE_WW	0x00040000
#define	RE_W	0x00080000
#define	RE_X	0x00100000
#define	RE_Z	0x00200000

/*
 * dwarf dump options.
 */
#define	DW_A	0x00000001
#define	DW_FF	0x00000002
#define	DW_F	0x00000004
#define	DW_I	0x00000008
#define	DW_LL	0x00000010
#define	DW_L	0x00000020
#define	DW_M	0x00000040
#define	DW_O	0x00000080
#define	DW_P	0x00000100
#define	DW_RR	0x00000200
#define	DW_R	0x00000400
#define	DW_S	0x00000800

#define	DW_DEFAULT_OPTIONS (DW_A | DW_F | DW_I | DW_L | DW_O | DW_P | \
	    DW_R | DW_RR | DW_S)

/*
 * readelf(1) run control flags.
 */
#define	DISPLAY_FILENAME	0x0001

/*
 * Internal data structure for sections.
 */
struct section {
	const char	*name;		/* section name */
	Elf_Scn		*scn;		/* section scn */
	uint64_t	 off;		/* section offset */
	uint64_t	 sz;		/* section size */
	uint64_t	 entsize;	/* section entsize */
	uint64_t	 align;		/* section alignment */
	uint64_t	 type;		/* section type */
	uint64_t	 flags;		/* section flags */
	uint64_t	 addr;		/* section virtual addr */
	uint32_t	 link;		/* section link ndx */
	uint32_t	 info;		/* section info ndx */
};

struct dumpop {
	union {
		size_t si;		/* section index */
		const char *sn;		/* section name */
	} u;
	enum {
		DUMP_BY_INDEX = 0,
		DUMP_BY_NAME
	} type;				/* dump type */
#define HEX_DUMP	0x0001
#define STR_DUMP	0x0002
	int op;				/* dump operation */
	STAILQ_ENTRY(dumpop) dumpop_list;
};

struct symver {
	const char *name;
	int type;
};

/*
 * Structure encapsulates the global data for readelf(1).
 */
struct readelf {
	const char	 *filename;	/* current processing file. */
	int		  options;	/* command line options. */
	int		  flags;	/* run control flags. */
	int		  dop;		/* dwarf dump options. */
	Elf		 *elf;		/* underlying ELF descriptor. */
	Elf		 *ar;		/* archive ELF descriptor. */
	Dwarf_Debug	  dbg;		/* DWARF handle. */
	Dwarf_Half	  cu_psize;	/* DWARF CU pointer size. */
	Dwarf_Half	  cu_osize;	/* DWARF CU offset size. */
	Dwarf_Half	  cu_ver;	/* DWARF CU version. */
	GElf_Ehdr	  ehdr;		/* ELF header. */
	int		  ec;		/* ELF class. */
	size_t		  shnum;	/* #sections. */
	struct section	 *vd_s;		/* Verdef section. */
	struct section	 *vn_s;		/* Verneed section. */
	struct section	 *vs_s;		/* Versym section. */
	uint16_t	 *vs;		/* Versym array. */
	int		  vs_sz;	/* Versym array size. */
	struct symver	 *ver;		/* Version array. */
	int		  ver_sz;	/* Size of version array. */
	struct section	 *sl;		/* list of sections. */
	STAILQ_HEAD(, dumpop) v_dumpop; /* list of dump ops. */
	uint64_t	(*dw_read)(Elf_Data *, uint64_t *, int);
	uint64_t	(*dw_decode)(uint8_t **, int);
};

enum options
{
	OPTION_DEBUG_DUMP
};

static struct option longopts[] = {
	{"all", no_argument, NULL, 'a'},
	{"arch-specific", no_argument, NULL, 'A'},
	{"archive-index", no_argument, NULL, 'c'},
	{"debug-dump", optional_argument, NULL, OPTION_DEBUG_DUMP},
	{"decompress", no_argument, 0, 'z'},
	{"dynamic", no_argument, NULL, 'd'},
	{"file-header", no_argument, NULL, 'h'},
	{"full-section-name", no_argument, NULL, 'N'},
	{"headers", no_argument, NULL, 'e'},
	{"help", no_argument, 0, 'H'},
	{"hex-dump", required_argument, NULL, 'x'},
	{"histogram", no_argument, NULL, 'I'},
	{"notes", no_argument, NULL, 'n'},
	{"program-headers", no_argument, NULL, 'l'},
	{"relocs", no_argument, NULL, 'r'},
	{"sections", no_argument, NULL, 'S'},
	{"section-headers", no_argument, NULL, 'S'},
	{"section-groups", no_argument, NULL, 'g'},
	{"section-details", no_argument, NULL, 't'},
	{"segments", no_argument, NULL, 'l'},
	{"string-dump", required_argument, NULL, 'p'},
	{"symbols", no_argument, NULL, 's'},
	{"syms", no_argument, NULL, 's'},
	{"unwind", no_argument, NULL, 'u'},
	{"use-dynamic", no_argument, NULL, 'D'},
	{"version-info", no_argument, 0, 'V'},
	{"version", no_argument, 0, 'v'},
	{"wide", no_argument, 0, 'W'},
	{NULL, 0, NULL, 0}
};

struct eflags_desc {
	uint64_t flag;
	const char *desc;
};

struct flag_desc {
	uint64_t flag;
	const char *desc;
};

struct flag_desc_list {
	uint32_t type;
	const char *desc_str;
	struct flag_desc *desc;
};

struct mips_option {
	uint64_t flag;
	const char *desc;
};

struct loc_at {
	Dwarf_Attribute la_at;
	Dwarf_Unsigned la_off;
	Dwarf_Unsigned la_lowpc;
	Dwarf_Half la_cu_psize;
	Dwarf_Half la_cu_osize;
	Dwarf_Half la_cu_ver;
};

static void add_dumpop(struct readelf *re, size_t si, const char *sn, int op,
    int t);
static const char *aeabi_adv_simd_arch(uint64_t simd);
static const char *aeabi_align_needed(uint64_t an);
static const char *aeabi_align_preserved(uint64_t ap);
static const char *aeabi_arm_isa(uint64_t ai);
static const char *aeabi_cpu_arch(uint64_t arch);
static const char *aeabi_cpu_arch_profile(uint64_t pf);
static const char *aeabi_div(uint64_t du);
static const char *aeabi_enum_size(uint64_t es);
static const char *aeabi_fp_16bit_format(uint64_t fp16);
static const char *aeabi_fp_arch(uint64_t fp);
static const char *aeabi_fp_denormal(uint64_t fd);
static const char *aeabi_fp_exceptions(uint64_t fe);
static const char *aeabi_fp_hpext(uint64_t fh);
static const char *aeabi_fp_number_model(uint64_t fn);
static const char *aeabi_fp_optm_goal(uint64_t fog);
static const char *aeabi_fp_rounding(uint64_t fr);
static const char *aeabi_hardfp(uint64_t hfp);
static const char *aeabi_mpext(uint64_t mp);
static const char *aeabi_optm_goal(uint64_t og);
static const char *aeabi_pcs_config(uint64_t pcs);
static const char *aeabi_pcs_got(uint64_t got);
static const char *aeabi_pcs_r9(uint64_t r9);
static const char *aeabi_pcs_ro(uint64_t ro);
static const char *aeabi_pcs_rw(uint64_t rw);
static const char *aeabi_pcs_wchar_t(uint64_t wt);
static const char *aeabi_t2ee(uint64_t t2ee);
static const char *aeabi_thumb_isa(uint64_t ti);
static const char *aeabi_fp_user_exceptions(uint64_t fu);
static const char *aeabi_unaligned_access(uint64_t ua);
static const char *aeabi_vfp_args(uint64_t va);
static const char *aeabi_virtual(uint64_t vt);
static const char *aeabi_wmmx_arch(uint64_t wmmx);
static const char *aeabi_wmmx_args(uint64_t wa);
static const char *elf_class(unsigned int class);
static const char *elf_endian(unsigned int endian);
static const char *elf_machine(unsigned int mach);
static const char *elf_osabi(unsigned int abi);
static const char *elf_type(unsigned int type);
static const char *elf_ver(unsigned int ver);
static const char *dt_type(unsigned int mach, unsigned int dtype);
static bool dump_ar(struct readelf *re, int);
static void dump_arm_attributes(struct readelf *re, uint8_t *p, uint8_t *pe);
static void dump_attributes(struct readelf *re);
static uint8_t *dump_compatibility_tag(uint8_t *p, uint8_t *pe);
static void dump_dwarf(struct readelf *re);
static void dump_dwarf_abbrev(struct readelf *re);
static void dump_dwarf_aranges(struct readelf *re);
static void dump_dwarf_block(struct readelf *re, uint8_t *b,
    Dwarf_Unsigned len);
static void dump_dwarf_die(struct readelf *re, Dwarf_Die die, int level);
static void dump_dwarf_frame(struct readelf *re, int alt);
static void dump_dwarf_frame_inst(struct readelf *re, Dwarf_Cie cie,
    uint8_t *insts, Dwarf_Unsigned len, Dwarf_Unsigned caf, Dwarf_Signed daf,
    Dwarf_Addr pc, Dwarf_Debug dbg);
static int dump_dwarf_frame_regtable(struct readelf *re, Dwarf_Fde fde,
    Dwarf_Addr pc, Dwarf_Unsigned func_len, Dwarf_Half cie_ra);
static void dump_dwarf_frame_section(struct readelf *re, struct section *s,
    int alt);
static void dump_dwarf_info(struct readelf *re, Dwarf_Bool is_info);
static void dump_dwarf_macinfo(struct readelf *re);
static void dump_dwarf_line(struct readelf *re);
static void dump_dwarf_line_decoded(struct readelf *re);
static void dump_dwarf_loc(struct readelf *re, Dwarf_Loc *lr);
static void dump_dwarf_loclist(struct readelf *re);
static void dump_dwarf_pubnames(struct readelf *re);
static void dump_dwarf_ranges(struct readelf *re);
static void dump_dwarf_ranges_foreach(struct readelf *re, Dwarf_Die die,
    Dwarf_Addr base);
static void dump_dwarf_str(struct readelf *re);
static void dump_eflags(struct readelf *re, uint64_t e_flags);
static bool dump_elf(struct readelf *re);
static void dump_flags(struct flag_desc *fd, uint64_t flags);
static void dump_dyn_val(struct readelf *re, GElf_Dyn *dyn, uint32_t stab);
static void dump_dynamic(struct readelf *re);
static void dump_liblist(struct readelf *re);
static void dump_mips_abiflags(struct readelf *re, struct section *s);
static void dump_mips_attributes(struct readelf *re, uint8_t *p, uint8_t *pe);
static void dump_mips_odk_reginfo(struct readelf *re, uint8_t *p, size_t sz);
static void dump_mips_options(struct readelf *re, struct section *s);
static void dump_mips_option_flags(const char *name, struct mips_option *opt,
    uint64_t info);
static void dump_mips_reginfo(struct readelf *re, struct section *s);
static void dump_mips_specific_info(struct readelf *re);
static void dump_notes(struct readelf *re);
static void dump_notes_content(struct readelf *re, const char *buf, size_t sz,
    off_t off);
static void dump_notes_data(struct readelf *re, const char *name,
    uint32_t type, const char *buf, size_t sz);
static void dump_svr4_hash(struct section *s);
static void dump_svr4_hash64(struct readelf *re, struct section *s);
static void dump_gnu_hash(struct readelf *re, struct section *s);
static void dump_gnu_property_type_0(struct readelf *re, const char *buf,
    size_t sz);
static void dump_hash(struct readelf *re);
static void dump_phdr(struct readelf *re);
static void dump_ppc_attributes(uint8_t *p, uint8_t *pe);
static void dump_section_groups(struct readelf *re);
static void dump_symtab(struct readelf *re, int i);
static void dump_symtabs(struct readelf *re);
static uint8_t *dump_unknown_tag(uint64_t tag, uint8_t *p, uint8_t *pe);
static void dump_ver(struct readelf *re);
static void dump_verdef(struct readelf *re, int dump);
static void dump_verneed(struct readelf *re, int dump);
static void dump_versym(struct readelf *re);
static const char *dwarf_reg(unsigned int mach, unsigned int reg);
static const char *dwarf_regname(struct readelf *re, unsigned int num);
static struct dumpop *find_dumpop(struct readelf *re, size_t si,
    const char *sn, int op, int t);
static int get_ent_count(struct section *s, int *ent_count);
static int get_mips_register_size(uint8_t flag);
static char *get_regoff_str(struct readelf *re, Dwarf_Half reg,
    Dwarf_Addr off);
static const char *get_string(struct readelf *re, int strtab, size_t off);
static const char *get_symbol_name(struct readelf *re, int symtab, int i);
static uint64_t get_symbol_value(struct readelf *re, int symtab, int i);
static void load_sections(struct readelf *re);
static int loc_at_comparator(const void *la1, const void *la2);
static const char *mips_abi_fp(uint64_t fp);
static const char *note_type(const char *note_name, unsigned int et,
    unsigned int nt);
static const char *note_type_freebsd(unsigned int nt);
static const char *note_type_freebsd_core(unsigned int nt);
static const char *note_type_go(unsigned int nt);
static const char *note_type_gnu(unsigned int nt);
static const char *note_type_linux_core(unsigned int nt);
static const char *note_type_netbsd(unsigned int nt);
static const char *note_type_openbsd(unsigned int nt);
static const char *note_type_unknown(unsigned int nt);
static const char *note_type_xen(unsigned int nt);
static const char *option_kind(uint8_t kind);
static const char *phdr_type(unsigned int mach, unsigned int ptype);
static const char *ppc_abi_fp(uint64_t fp);
static const char *ppc_abi_vector(uint64_t vec);
static void readelf_usage(int status);
static void readelf_version(void);
static void search_loclist_at(struct readelf *re, Dwarf_Die die,
    Dwarf_Unsigned lowpc, struct loc_at **la_list,
    size_t *la_list_len, size_t *la_list_cap);
static void search_ver(struct readelf *re);
static const char *section_type(unsigned int mach, unsigned int stype);
static void set_cu_context(struct readelf *re, Dwarf_Half psize,
    Dwarf_Half osize, Dwarf_Half ver);
static const char *st_bind(unsigned int sbind);
static const char *st_shndx(unsigned int shndx);
static const char *st_type(unsigned int mach, unsigned int os,
    unsigned int stype);
static const char *st_vis(unsigned int svis);
static const char *top_tag(unsigned int tag);
static void unload_sections(struct readelf *re);
static uint64_t _read_lsb(Elf_Data *d, uint64_t *offsetp,
    int bytes_to_read);
static uint64_t _read_msb(Elf_Data *d, uint64_t *offsetp,
    int bytes_to_read);
static uint64_t _decode_lsb(uint8_t **data, int bytes_to_read);
static uint64_t _decode_msb(uint8_t **data, int bytes_to_read);
static int64_t _decode_sleb128(uint8_t **dp, uint8_t *dpe);
static uint64_t _decode_uleb128(uint8_t **dp, uint8_t *dpe);

static struct eflags_desc arm_eflags_desc[] = {
	{EF_ARM_RELEXEC, "relocatable executable"},
	{EF_ARM_HASENTRY, "has entry point"},
	{EF_ARM_SYMSARESORTED, "sorted symbol tables"},
	{EF_ARM_DYNSYMSUSESEGIDX, "dynamic symbols use segment index"},
	{EF_ARM_MAPSYMSFIRST, "mapping symbols precede others"},
	{EF_ARM_BE8, "BE8"},
	{EF_ARM_LE8, "LE8"},
	{EF_ARM_INTERWORK, "interworking enabled"},
	{EF_ARM_APCS_26, "uses APCS/26"},
	{EF_ARM_APCS_FLOAT, "uses APCS/float"},
	{EF_ARM_PIC, "position independent"},
	{EF_ARM_ALIGN8, "8 bit structure alignment"},
	{EF_ARM_NEW_ABI, "uses new ABI"},
	{EF_ARM_OLD_ABI, "uses old ABI"},
	{EF_ARM_SOFT_FLOAT, "software FP"},
	{EF_ARM_VFP_FLOAT, "VFP"},
	{EF_ARM_MAVERICK_FLOAT, "Maverick FP"},
	{0, NULL}
};

static struct eflags_desc mips_eflags_desc[] = {
	{EF_MIPS_NOREORDER, "noreorder"},
	{EF_MIPS_PIC, "pic"},
	{EF_MIPS_CPIC, "cpic"},
	{EF_MIPS_UCODE, "ugen_reserved"},
	{EF_MIPS_ABI2, "abi2"},
	{EF_MIPS_OPTIONS_FIRST, "odk first"},
	{EF_MIPS_ARCH_ASE_MDMX, "mdmx"},
	{EF_MIPS_ARCH_ASE_M16, "mips16"},
	{0, NULL}
};

static struct eflags_desc powerpc_eflags_desc[] = {
	{EF_PPC_EMB, "emb"},
	{EF_PPC_RELOCATABLE, "relocatable"},
	{EF_PPC_RELOCATABLE_LIB, "relocatable-lib"},
	{0, NULL}
};

static struct eflags_desc riscv_eflags_desc[] = {
	{EF_RISCV_RVC, "RVC"},
	{EF_RISCV_RVE, "RVE"},
	{EF_RISCV_TSO, "TSO"},
	{0, NULL}
};

static struct eflags_desc sparc_eflags_desc[] = {
	{EF_SPARC_32PLUS, "v8+"},
	{EF_SPARC_SUN_US1, "ultrasparcI"},
	{EF_SPARC_HAL_R1, "halr1"},
	{EF_SPARC_SUN_US3, "ultrasparcIII"},
	{0, NULL}
};

static const char *
elf_osabi(unsigned int abi)
{
	static char s_abi[32];

	switch(abi) {
	case ELFOSABI_NONE: return "NONE";
	case ELFOSABI_HPUX: return "HPUX";
	case ELFOSABI_NETBSD: return "NetBSD";
	case ELFOSABI_GNU: return "GNU";
	case ELFOSABI_HURD: return "HURD";
	case ELFOSABI_86OPEN: return "86OPEN";
	case ELFOSABI_SOLARIS: return "Solaris";
	case ELFOSABI_AIX: return "AIX";
	case ELFOSABI_IRIX: return "IRIX";
	case ELFOSABI_FREEBSD: return "FreeBSD";
	case ELFOSABI_TRU64: return "TRU64";
	case ELFOSABI_MODESTO: return "MODESTO";
	case ELFOSABI_OPENBSD: return "OpenBSD";
	case ELFOSABI_OPENVMS: return "OpenVMS";
	case ELFOSABI_NSK: return "NSK";
	case ELFOSABI_CLOUDABI: return "CloudABI";
	case ELFOSABI_ARM_AEABI: return "ARM EABI";
	case ELFOSABI_ARM: return "ARM";
	case ELFOSABI_STANDALONE: return "StandAlone";
	default:
		snprintf(s_abi, sizeof(s_abi), "<unknown: %#x>", abi);
		return (s_abi);
	}
};

static const char *
elf_machine(unsigned int mach)
{
	static char s_mach[32];

	switch (mach) {
	case EM_NONE: return "Unknown machine";
	case EM_M32: return "AT&T WE32100";
	case EM_SPARC: return "Sun SPARC";
	case EM_386: return "Intel i386";
	case EM_68K: return "Motorola 68000";
	case EM_IAMCU: return "Intel MCU";
	case EM_88K: return "Motorola 88000";
	case EM_860: return "Intel i860";
	case EM_MIPS: return "MIPS R3000 Big-Endian only";
	case EM_S370: return "IBM System/370";
	case EM_MIPS_RS3_LE: return "MIPS R3000 Little-Endian";
	case EM_PARISC: return "HP PA-RISC";
	case EM_VPP500: return "Fujitsu VPP500";
	case EM_SPARC32PLUS: return "SPARC v8plus";
	case EM_960: return "Intel 80960";
	case EM_PPC: return "PowerPC 32-bit";
	case EM_PPC64: return "PowerPC 64-bit";
	case EM_S390: return "IBM System/390";
	case EM_V800: return "NEC V800";
	case EM_FR20: return "Fujitsu FR20";
	case EM_RH32: return "TRW RH-32";
	case EM_RCE: return "Motorola RCE";
	case EM_ARM: return "ARM";
	case EM_SH: return "Hitachi SH";
	case EM_SPARCV9: return "SPARC v9 64-bit";
	case EM_TRICORE: return "Siemens TriCore embedded processor";
	case EM_ARC: return "Argonaut RISC Core";
	case EM_H8_300: return "Hitachi H8/300";
	case EM_H8_300H: return "Hitachi H8/300H";
	case EM_H8S: return "Hitachi H8S";
	case EM_H8_500: return "Hitachi H8/500";
	case EM_IA_64: return "Intel IA-64 Processor";
	case EM_MIPS_X: return "Stanford MIPS-X";
	case EM_COLDFIRE: return "Motorola ColdFire";
	case EM_68HC12: return "Motorola M68HC12";
	case EM_MMA: return "Fujitsu MMA";
	case EM_PCP: return "Siemens PCP";
	case EM_NCPU: return "Sony nCPU";
	case EM_NDR1: return "Denso NDR1 microprocessor";
	case EM_STARCORE: return "Motorola Star*Core processor";
	case EM_ME16: return "Toyota ME16 processor";
	case EM_ST100: return "STMicroelectronics ST100 processor";
	case EM_TINYJ: return "Advanced Logic Corp. TinyJ processor";
	case EM_X86_64: return "Advanced Micro Devices x86-64";
	case EM_PDSP: return "Sony DSP Processor";
	case EM_FX66: return "Siemens FX66 microcontroller";
	case EM_ST9PLUS: return "STMicroelectronics ST9+ 8/16 microcontroller";
	case EM_ST7: return "STmicroelectronics ST7 8-bit microcontroller";
	case EM_68HC16: return "Motorola MC68HC16 microcontroller";
	case EM_68HC11: return "Motorola MC68HC11 microcontroller";
	case EM_68HC08: return "Motorola MC68HC08 microcontroller";
	case EM_68HC05: return "Motorola MC68HC05 microcontroller";
	case EM_SVX: return "Silicon Graphics SVx";
	case EM_ST19: return "STMicroelectronics ST19 8-bit mc";
	case EM_VAX: return "Digital VAX";
	case EM_CRIS: return "Axis Communications 32-bit embedded processor";
	case EM_JAVELIN: return "Infineon Tech. 32bit embedded processor";
	case EM_FIREPATH: return "Element 14 64-bit DSP Processor";
	case EM_ZSP: return "LSI Logic 16-bit DSP Processor";
	case EM_MMIX: return "Donald Knuth's educational 64-bit proc";
	case EM_HUANY: return "Harvard University MI object files";
	case EM_PRISM: return "SiTera Prism";
	case EM_AVR: return "Atmel AVR 8-bit microcontroller";
	case EM_FR30: return "Fujitsu FR30";
	case EM_D10V: return "Mitsubishi D10V";
	case EM_D30V: return "Mitsubishi D30V";
	case EM_V850: return "NEC v850";
	case EM_M32R: return "Mitsubishi M32R";
	case EM_MN10300: return "Matsushita MN10300";
	case EM_MN10200: return "Matsushita MN10200";
	case EM_PJ: return "picoJava";
	case EM_OPENRISC: return "OpenRISC 32-bit embedded processor";
	case EM_ARC_A5: return "ARC Cores Tangent-A5";
	case EM_XTENSA: return "Tensilica Xtensa Architecture";
	case EM_VIDEOCORE: return "Alphamosaic VideoCore processor";
	case EM_TMM_GPP: return "Thompson Multimedia General Purpose Processor";
	case EM_NS32K: return "National Semiconductor 32000 series";
	case EM_TPC: return "Tenor Network TPC processor";
	case EM_SNP1K: return "Trebia SNP 1000 processor";
	case EM_ST200: return "STMicroelectronics ST200 microcontroller";
	case EM_IP2K: return "Ubicom IP2xxx microcontroller family";
	case EM_MAX: return "MAX Processor";
	case EM_CR: return "National Semiconductor CompactRISC microprocessor";
	case EM_F2MC16: return "Fujitsu F2MC16";
	case EM_MSP430: return "TI embedded microcontroller msp430";
	case EM_BLACKFIN: return "Analog Devices Blackfin (DSP) processor";
	case EM_SE_C33: return "S1C33 Family of Seiko Epson processors";
	case EM_SEP: return "Sharp embedded microprocessor";
	case EM_ARCA: return "Arca RISC Microprocessor";
	case EM_UNICORE: return "Microprocessor series from PKU-Unity Ltd";
	case EM_AARCH64: return "AArch64";
	case EM_RISCV: return "RISC-V";
	default:
		snprintf(s_mach, sizeof(s_mach), "<unknown: %#x>", mach);
		return (s_mach);
	}

}

static const char *
elf_class(unsigned int class)
{
	static char s_class[32];

	switch (class) {
	case ELFCLASSNONE: return "none";
	case ELFCLASS32: return "ELF32";
	case ELFCLASS64: return "ELF64";
	default:
		snprintf(s_class, sizeof(s_class), "<unknown: %#x>", class);
		return (s_class);
	}
}

static const char *
elf_endian(unsigned int endian)
{
	static char s_endian[32];

	switch (endian) {
	case ELFDATANONE: return "none";
	case ELFDATA2LSB: return "2's complement, little endian";
	case ELFDATA2MSB: return "2's complement, big endian";
	default:
		snprintf(s_endian, sizeof(s_endian), "<unknown: %#x>", endian);
		return (s_endian);
	}
}

static const char *
elf_type(unsigned int type)
{
	static char s_type[32];

	switch (type) {
	case ET_NONE: return "NONE (None)";
	case ET_REL: return "REL (Relocatable file)";
	case ET_EXEC: return "EXEC (Executable file)";
	case ET_DYN: return "DYN (Shared object file)";
	case ET_CORE: return "CORE (Core file)";
	default:
		if (type >= ET_LOPROC)
			snprintf(s_type, sizeof(s_type), "<proc: %#x>", type);
		else if (type >= ET_LOOS && type <= ET_HIOS)
			snprintf(s_type, sizeof(s_type), "<os: %#x>", type);
		else
			snprintf(s_type, sizeof(s_type), "<unknown: %#x>",
			    type);
		return (s_type);
	}
}

static const char *
elf_ver(unsigned int ver)
{
	static char s_ver[32];

	switch (ver) {
	case EV_CURRENT: return "(current)";
	case EV_NONE: return "(none)";
	default:
		snprintf(s_ver, sizeof(s_ver), "<unknown: %#x>",
		    ver);
		return (s_ver);
	}
}

static const char *
phdr_type(unsigned int mach, unsigned int ptype)
{
	static char s_ptype[32];

	if (ptype >= PT_LOPROC && ptype <= PT_HIPROC) {
		switch (mach) {
		case EM_ARM:
			switch (ptype) {
			case PT_ARM_ARCHEXT: return "ARM_ARCHEXT";
			case PT_ARM_EXIDX: return "ARM_EXIDX";
			}
			break;
		}
		snprintf(s_ptype, sizeof(s_ptype), "LOPROC+%#x",
		    ptype - PT_LOPROC);
		return (s_ptype);
	}

	switch (ptype) {
	case PT_NULL: return "NULL";
	case PT_LOAD: return "LOAD";
	case PT_DYNAMIC: return "DYNAMIC";
	case PT_INTERP: return "INTERP";
	case PT_NOTE: return "NOTE";
	case PT_SHLIB: return "SHLIB";
	case PT_PHDR: return "PHDR";
	case PT_TLS: return "TLS";
	case PT_GNU_EH_FRAME: return "GNU_EH_FRAME";
	case PT_GNU_STACK: return "GNU_STACK";
	case PT_GNU_RELRO: return "GNU_RELRO";
	case PT_OPENBSD_RANDOMIZE: return "OPENBSD_RANDOMIZE";
	case PT_OPENBSD_WXNEEDED: return "OPENBSD_WXNEEDED";
	case PT_OPENBSD_BOOTDATA: return "OPENBSD_BOOTDATA";
	default:
		if (ptype >= PT_LOOS && ptype <= PT_HIOS)
			snprintf(s_ptype, sizeof(s_ptype), "LOOS+%#x",
			    ptype - PT_LOOS);
		else
			snprintf(s_ptype, sizeof(s_ptype), "<unknown: %#x>",
			    ptype);
		return (s_ptype);
	}
}

static const char *
section_type(unsigned int mach, unsigned int stype)
{
	static char s_stype[32];

	if (stype >= SHT_LOPROC && stype <= SHT_HIPROC) {
		switch (mach) {
		case EM_ARM:
			switch (stype) {
			case SHT_ARM_EXIDX: return "ARM_EXIDX";
			case SHT_ARM_PREEMPTMAP: return "ARM_PREEMPTMAP";
			case SHT_ARM_ATTRIBUTES: return "ARM_ATTRIBUTES";
			case SHT_ARM_DEBUGOVERLAY: return "ARM_DEBUGOVERLAY";
			case SHT_ARM_OVERLAYSECTION: return "ARM_OVERLAYSECTION";
			}
			break;
		case EM_X86_64:
			switch (stype) {
			case SHT_X86_64_UNWIND: return "X86_64_UNWIND";
			default:
				break;
			}
			break;
		case EM_MIPS:
		case EM_MIPS_RS3_LE:
			switch (stype) {
			case SHT_MIPS_LIBLIST: return "MIPS_LIBLIST";
			case SHT_MIPS_MSYM: return "MIPS_MSYM";
			case SHT_MIPS_CONFLICT: return "MIPS_CONFLICT";
			case SHT_MIPS_GPTAB: return "MIPS_GPTAB";
			case SHT_MIPS_UCODE: return "MIPS_UCODE";
			case SHT_MIPS_DEBUG: return "MIPS_DEBUG";
			case SHT_MIPS_REGINFO: return "MIPS_REGINFO";
			case SHT_MIPS_PACKAGE: return "MIPS_PACKAGE";
			case SHT_MIPS_PACKSYM: return "MIPS_PACKSYM";
			case SHT_MIPS_RELD: return "MIPS_RELD";
			case SHT_MIPS_IFACE: return "MIPS_IFACE";
			case SHT_MIPS_CONTENT: return "MIPS_CONTENT";
			case SHT_MIPS_OPTIONS: return "MIPS_OPTIONS";
			case SHT_MIPS_DELTASYM: return "MIPS_DELTASYM";
			case SHT_MIPS_DELTAINST: return "MIPS_DELTAINST";
			case SHT_MIPS_DELTACLASS: return "MIPS_DELTACLASS";
			case SHT_MIPS_DWARF: return "MIPS_DWARF";
			case SHT_MIPS_DELTADECL: return "MIPS_DELTADECL";
			case SHT_MIPS_SYMBOL_LIB: return "MIPS_SYMBOL_LIB";
			case SHT_MIPS_EVENTS: return "MIPS_EVENTS";
			case SHT_MIPS_TRANSLATE: return "MIPS_TRANSLATE";
			case SHT_MIPS_PIXIE: return "MIPS_PIXIE";
			case SHT_MIPS_XLATE: return "MIPS_XLATE";
			case SHT_MIPS_XLATE_DEBUG: return "MIPS_XLATE_DEBUG";
			case SHT_MIPS_WHIRL: return "MIPS_WHIRL";
			case SHT_MIPS_EH_REGION: return "MIPS_EH_REGION";
			case SHT_MIPS_XLATE_OLD: return "MIPS_XLATE_OLD";
			case SHT_MIPS_PDR_EXCEPTION: return "MIPS_PDR_EXCEPTION";
			case SHT_MIPS_ABIFLAGS: return "MIPS_ABIFLAGS";
			default:
				break;
			}
			break;
		default:
			break;
		}

		snprintf(s_stype, sizeof(s_stype), "LOPROC+%#x",
		    stype - SHT_LOPROC);
		return (s_stype);
	}

	switch (stype) {
	case SHT_NULL: return "NULL";
	case SHT_PROGBITS: return "PROGBITS";
	case SHT_SYMTAB: return "SYMTAB";
	case SHT_STRTAB: return "STRTAB";
	case SHT_RELA: return "RELA";
	case SHT_HASH: return "HASH";
	case SHT_DYNAMIC: return "DYNAMIC";
	case SHT_NOTE: return "NOTE";
	case SHT_NOBITS: return "NOBITS";
	case SHT_REL: return "REL";
	case SHT_SHLIB: return "SHLIB";
	case SHT_DYNSYM: return "DYNSYM";
	case SHT_INIT_ARRAY: return "INIT_ARRAY";
	case SHT_FINI_ARRAY: return "FINI_ARRAY";
	case SHT_PREINIT_ARRAY: return "PREINIT_ARRAY";
	case SHT_GROUP: return "GROUP";
	case SHT_SYMTAB_SHNDX: return "SYMTAB_SHNDX";
	case SHT_SUNW_dof: return "SUNW_dof";
	case SHT_SUNW_cap: return "SUNW_cap";
	case SHT_GNU_HASH: return "GNU_HASH";
	case SHT_SUNW_ANNOTATE: return "SUNW_ANNOTATE";
	case SHT_SUNW_DEBUGSTR: return "SUNW_DEBUGSTR";
	case SHT_SUNW_DEBUG: return "SUNW_DEBUG";
	case SHT_SUNW_move: return "SUNW_move";
	case SHT_SUNW_COMDAT: return "SUNW_COMDAT";
	case SHT_SUNW_syminfo: return "SUNW_syminfo";
	case SHT_SUNW_verdef: return "SUNW_verdef";
	case SHT_SUNW_verneed: return "SUNW_verneed";
	case SHT_SUNW_versym: return "SUNW_versym";
	default:
		if (stype >= SHT_LOOS && stype <= SHT_HIOS)
			snprintf(s_stype, sizeof(s_stype), "LOOS+%#x",
			    stype - SHT_LOOS);
		else if (stype >= SHT_LOUSER)
			snprintf(s_stype, sizeof(s_stype), "LOUSER+%#x",
			    stype - SHT_LOUSER);
		else
			snprintf(s_stype, sizeof(s_stype), "<unknown: %#x>",
			    stype);
		return (s_stype);
	}
}

static const char *
dt_type(unsigned int mach, unsigned int dtype)
{
	static char s_dtype[32];

	switch (dtype) {
	case DT_NULL: return "NULL";
	case DT_NEEDED: return "NEEDED";
	case DT_PLTRELSZ: return "PLTRELSZ";
	case DT_PLTGOT: return "PLTGOT";
	case DT_HASH: return "HASH";
	case DT_STRTAB: return "STRTAB";
	case DT_SYMTAB: return "SYMTAB";
	case DT_RELA: return "RELA";
	case DT_RELASZ: return "RELASZ";
	case DT_RELAENT: return "RELAENT";
	case DT_STRSZ: return "STRSZ";
	case DT_SYMENT: return "SYMENT";
	case DT_INIT: return "INIT";
	case DT_FINI: return "FINI";
	case DT_SONAME: return "SONAME";
	case DT_RPATH: return "RPATH";
	case DT_SYMBOLIC: return "SYMBOLIC";
	case DT_REL: return "REL";
	case DT_RELSZ: return "RELSZ";
	case DT_RELENT: return "RELENT";
	case DT_PLTREL: return "PLTREL";
	case DT_DEBUG: return "DEBUG";
	case DT_TEXTREL: return "TEXTREL";
	case DT_JMPREL: return "JMPREL";
	case DT_BIND_NOW: return "BIND_NOW";
	case DT_INIT_ARRAY: return "INIT_ARRAY";
	case DT_FINI_ARRAY: return "FINI_ARRAY";
	case DT_INIT_ARRAYSZ: return "INIT_ARRAYSZ";
	case DT_FINI_ARRAYSZ: return "FINI_ARRAYSZ";
	case DT_RUNPATH: return "RUNPATH";
	case DT_FLAGS: return "FLAGS";
	case DT_PREINIT_ARRAY: return "PREINIT_ARRAY";
	case DT_PREINIT_ARRAYSZ: return "PREINIT_ARRAYSZ";
	case DT_MAXPOSTAGS: return "MAXPOSTAGS";
	case DT_SUNW_AUXILIARY: return "SUNW_AUXILIARY";
	case DT_SUNW_RTLDINF: return "SUNW_RTLDINF";
	case DT_SUNW_FILTER: return "SUNW_FILTER";
	case DT_SUNW_CAP: return "SUNW_CAP";
	case DT_SUNW_ASLR: return "SUNW_ASLR";
	case DT_CHECKSUM: return "CHECKSUM";
	case DT_PLTPADSZ: return "PLTPADSZ";
	case DT_MOVEENT: return "MOVEENT";
	case DT_MOVESZ: return "MOVESZ";
	case DT_FEATURE: return "FEATURE";
	case DT_POSFLAG_1: return "POSFLAG_1";
	case DT_SYMINSZ: return "SYMINSZ";
	case DT_SYMINENT: return "SYMINENT";
	case DT_GNU_HASH: return "GNU_HASH";
	case DT_TLSDESC_PLT: return "DT_TLSDESC_PLT";
	case DT_TLSDESC_GOT: return "DT_TLSDESC_GOT";
	case DT_GNU_CONFLICT: return "GNU_CONFLICT";
	case DT_GNU_LIBLIST: return "GNU_LIBLIST";
	case DT_CONFIG: return "CONFIG";
	case DT_DEPAUDIT: return "DEPAUDIT";
	case DT_AUDIT: return "AUDIT";
	case DT_PLTPAD: return "PLTPAD";
	case DT_MOVETAB: return "MOVETAB";
	case DT_SYMINFO: return "SYMINFO";
	case DT_VERSYM: return "VERSYM";
	case DT_RELACOUNT: return "RELACOUNT";
	case DT_RELCOUNT: return "RELCOUNT";
	case DT_FLAGS_1: return "FLAGS_1";
	case DT_VERDEF: return "VERDEF";
	case DT_VERDEFNUM: return "VERDEFNUM";
	case DT_VERNEED: return "VERNEED";
	case DT_VERNEEDNUM: return "VERNEEDNUM";
	case DT_AUXILIARY: return "AUXILIARY";
	case DT_USED: return "USED";
	case DT_FILTER: return "FILTER";
	case DT_GNU_PRELINKED: return "GNU_PRELINKED";
	case DT_GNU_CONFLICTSZ: return "GNU_CONFLICTSZ";
	case DT_GNU_LIBLISTSZ: return "GNU_LIBLISTSZ";
	}

	if (dtype >= DT_LOPROC && dtype <= DT_HIPROC) {
		switch (mach) {
		case EM_ARM:
			switch (dtype) {
			case DT_ARM_SYMTABSZ:
				return "ARM_SYMTABSZ";
			default:
				break;
			}
			break;
		case EM_MIPS:
		case EM_MIPS_RS3_LE:
			switch (dtype) {
			case DT_MIPS_RLD_VERSION:
				return "MIPS_RLD_VERSION";
			case DT_MIPS_TIME_STAMP:
				return "MIPS_TIME_STAMP";
			case DT_MIPS_ICHECKSUM:
				return "MIPS_ICHECKSUM";
			case DT_MIPS_IVERSION:
				return "MIPS_IVERSION";
			case DT_MIPS_FLAGS:
				return "MIPS_FLAGS";
			case DT_MIPS_BASE_ADDRESS:
				return "MIPS_BASE_ADDRESS";
			case DT_MIPS_CONFLICT:
				return "MIPS_CONFLICT";
			case DT_MIPS_LIBLIST:
				return "MIPS_LIBLIST";
			case DT_MIPS_LOCAL_GOTNO:
				return "MIPS_LOCAL_GOTNO";
			case DT_MIPS_CONFLICTNO:
				return "MIPS_CONFLICTNO";
			case DT_MIPS_LIBLISTNO:
				return "MIPS_LIBLISTNO";
			case DT_MIPS_SYMTABNO:
				return "MIPS_SYMTABNO";
			case DT_MIPS_UNREFEXTNO:
				return "MIPS_UNREFEXTNO";
			case DT_MIPS_GOTSYM:
				return "MIPS_GOTSYM";
			case DT_MIPS_HIPAGENO:
				return "MIPS_HIPAGENO";
			case DT_MIPS_RLD_MAP:
				return "MIPS_RLD_MAP";
			case DT_MIPS_DELTA_CLASS:
				return "MIPS_DELTA_CLASS";
			case DT_MIPS_DELTA_CLASS_NO:
				return "MIPS_DELTA_CLASS_NO";
			case DT_MIPS_DELTA_INSTANCE:
				return "MIPS_DELTA_INSTANCE";
			case DT_MIPS_DELTA_INSTANCE_NO:
				return "MIPS_DELTA_INSTANCE_NO";
			case DT_MIPS_DELTA_RELOC:
				return "MIPS_DELTA_RELOC";
			case DT_MIPS_DELTA_RELOC_NO:
				return "MIPS_DELTA_RELOC_NO";
			case DT_MIPS_DELTA_SYM:
				return "MIPS_DELTA_SYM";
			case DT_MIPS_DELTA_SYM_NO:
				return "MIPS_DELTA_SYM_NO";
			case DT_MIPS_DELTA_CLASSSYM:
				return "MIPS_DELTA_CLASSSYM";
			case DT_MIPS_DELTA_CLASSSYM_NO:
				return "MIPS_DELTA_CLASSSYM_NO";
			case DT_MIPS_CXX_FLAGS:
				return "MIPS_CXX_FLAGS";
			case DT_MIPS_PIXIE_INIT:
				return "MIPS_PIXIE_INIT";
			case DT_MIPS_SYMBOL_LIB:
				return "MIPS_SYMBOL_LIB";
			case DT_MIPS_LOCALPAGE_GOTIDX:
				return "MIPS_LOCALPAGE_GOTIDX";
			case DT_MIPS_LOCAL_GOTIDX:
				return "MIPS_LOCAL_GOTIDX";
			case DT_MIPS_HIDDEN_GOTIDX:
				return "MIPS_HIDDEN_GOTIDX";
			case DT_MIPS_PROTECTED_GOTIDX:
				return "MIPS_PROTECTED_GOTIDX";
			case DT_MIPS_OPTIONS:
				return "MIPS_OPTIONS";
			case DT_MIPS_INTERFACE:
				return "MIPS_INTERFACE";
			case DT_MIPS_DYNSTR_ALIGN:
				return "MIPS_DYNSTR_ALIGN";
			case DT_MIPS_INTERFACE_SIZE:
				return "MIPS_INTERFACE_SIZE";
			case DT_MIPS_RLD_TEXT_RESOLVE_ADDR:
				return "MIPS_RLD_TEXT_RESOLVE_ADDR";
			case DT_MIPS_PERF_SUFFIX:
				return "MIPS_PERF_SUFFIX";
			case DT_MIPS_COMPACT_SIZE:
				return "MIPS_COMPACT_SIZE";
			case DT_MIPS_GP_VALUE:
				return "MIPS_GP_VALUE";
			case DT_MIPS_AUX_DYNAMIC:
				return "MIPS_AUX_DYNAMIC";
			case DT_MIPS_PLTGOT:
				return "MIPS_PLTGOT";
			case DT_MIPS_RLD_OBJ_UPDATE:
				return "MIPS_RLD_OBJ_UPDATE";
			case DT_MIPS_RWPLT:
				return "MIPS_RWPLT";
			default:
				break;
			}
			break;
		case EM_SPARC:
		case EM_SPARC32PLUS:
		case EM_SPARCV9:
			switch (dtype) {
			case DT_SPARC_REGISTER:
				return "DT_SPARC_REGISTER";
			default:
				break;
			}
			break;
		default:
			break;
		}
	}

	snprintf(s_dtype, sizeof(s_dtype), "<unknown: %#x>", dtype);
	return (s_dtype);
}

static const char *
st_bind(unsigned int sbind)
{
	static char s_sbind[32];

	switch (sbind) {
	case STB_LOCAL: return "LOCAL";
	case STB_GLOBAL: return "GLOBAL";
	case STB_WEAK: return "WEAK";
	case STB_GNU_UNIQUE: return "UNIQUE";
	default:
		if (sbind >= STB_LOOS && sbind <= STB_HIOS)
			return "OS";
		else if (sbind >= STB_LOPROC && sbind <= STB_HIPROC)
			return "PROC";
		else
			snprintf(s_sbind, sizeof(s_sbind), "<unknown: %#x>",
			    sbind);
		return (s_sbind);
	}
}

static const char *
st_type(unsigned int mach, unsigned int os, unsigned int stype)
{
	static char s_stype[32];

	switch (stype) {
	case STT_NOTYPE: return "NOTYPE";
	case STT_OBJECT: return "OBJECT";
	case STT_FUNC: return "FUNC";
	case STT_SECTION: return "SECTION";
	case STT_FILE: return "FILE";
	case STT_COMMON: return "COMMON";
	case STT_TLS: return "TLS";
	default:
		if (stype >= STT_LOOS && stype <= STT_HIOS) {
			if ((os == ELFOSABI_GNU || os == ELFOSABI_FREEBSD) &&
			    stype == STT_GNU_IFUNC)
				return "IFUNC";
			snprintf(s_stype, sizeof(s_stype), "OS+%#x",
			    stype - STT_LOOS);
		} else if (stype >= STT_LOPROC && stype <= STT_HIPROC) {
			if (mach == EM_SPARCV9 && stype == STT_SPARC_REGISTER)
				return "REGISTER";
			snprintf(s_stype, sizeof(s_stype), "PROC+%#x",
			    stype - STT_LOPROC);
		} else
			snprintf(s_stype, sizeof(s_stype), "<unknown: %#x>",
			    stype);
		return (s_stype);
	}
}

static const char *
st_vis(unsigned int svis)
{
	static char s_svis[32];

	switch(svis) {
	case STV_DEFAULT: return "DEFAULT";
	case STV_INTERNAL: return "INTERNAL";
	case STV_HIDDEN: return "HIDDEN";
	case STV_PROTECTED: return "PROTECTED";
	default:
		snprintf(s_svis, sizeof(s_svis), "<unknown: %#x>", svis);
		return (s_svis);
	}
}

static const char *
st_shndx(unsigned int shndx)
{
	static char s_shndx[32];

	switch (shndx) {
	case SHN_UNDEF: return "UND";
	case SHN_ABS: return "ABS";
	case SHN_COMMON: return "COM";
	default:
		if (shndx >= SHN_LOPROC && shndx <= SHN_HIPROC)
			return "PRC";
		else if (shndx >= SHN_LOOS && shndx <= SHN_HIOS)
			return "OS";
		else
			snprintf(s_shndx, sizeof(s_shndx), "%u", shndx);
		return (s_shndx);
	}
}

static struct {
	const char *ln;
	char sn;
	int value;
} section_flag[] = {
	{"WRITE", 'W', SHF_WRITE},
	{"ALLOC", 'A', SHF_ALLOC},
	{"EXEC", 'X', SHF_EXECINSTR},
	{"MERGE", 'M', SHF_MERGE},
	{"STRINGS", 'S', SHF_STRINGS},
	{"INFO LINK", 'I', SHF_INFO_LINK},
	{"OS NONCONF", 'O', SHF_OS_NONCONFORMING},
	{"GROUP", 'G', SHF_GROUP},
	{"TLS", 'T', SHF_TLS},
	{"COMPRESSED", 'C', SHF_COMPRESSED},
	{NULL, 0, 0}
};

static const char *
note_type(const char *name, unsigned int et, unsigned int nt)
{
	if ((strcmp(name, "CORE") == 0 || strcmp(name, "LINUX") == 0) &&
	    et == ET_CORE)
		return note_type_linux_core(nt);
	else if (strcmp(name, "FreeBSD") == 0)
		if (et == ET_CORE)
			return note_type_freebsd_core(nt);
		else
			return note_type_freebsd(nt);
	else if (strcmp(name, "GNU") == 0 && et != ET_CORE)
		return note_type_gnu(nt);
	else if (strcmp(name, "Go") == 0 && et != ET_CORE)
		return note_type_go(nt);
	else if (strcmp(name, "NetBSD") == 0 && et != ET_CORE)
		return note_type_netbsd(nt);
	else if (strcmp(name, "OpenBSD") == 0 && et != ET_CORE)
		return note_type_openbsd(nt);
	else if (strcmp(name, "Xen") == 0 && et != ET_CORE)
		return note_type_xen(nt);
	return note_type_unknown(nt);
}

static const char *
note_type_freebsd(unsigned int nt)
{
	switch (nt) {
	case 1: return "NT_FREEBSD_ABI_TAG";
	case 2: return "NT_FREEBSD_NOINIT_TAG";
	case 3: return "NT_FREEBSD_ARCH_TAG";
	case 4: return "NT_FREEBSD_FEATURE_CTL";
	default: return (note_type_unknown(nt));
	}
}

static const char *
note_type_freebsd_core(unsigned int nt)
{
	switch (nt) {
	case 1: return "NT_PRSTATUS";
	case 2: return "NT_FPREGSET";
	case 3: return "NT_PRPSINFO";
	case 7: return "NT_THRMISC";
	case 8: return "NT_PROCSTAT_PROC";
	case 9: return "NT_PROCSTAT_FILES";
	case 10: return "NT_PROCSTAT_VMMAP";
	case 11: return "NT_PROCSTAT_GROUPS";
	case 12: return "NT_PROCSTAT_UMASK";
	case 13: return "NT_PROCSTAT_RLIMIT";
	case 14: return "NT_PROCSTAT_OSREL";
	case 15: return "NT_PROCSTAT_PSSTRINGS";
	case 16: return "NT_PROCSTAT_AUXV";
	case 17: return "NT_PTLWPINFO";
	case 0x100: return "NT_PPC_VMX (ppc Altivec registers)";
	case 0x102: return "NT_PPC_VSX (ppc VSX registers)";
	case 0x200: return "NT_X86_SEGBASES (x86 segment base registers)";
	case 0x202: return "NT_X86_XSTATE (x86 XSAVE extended state)";
	case 0x400: return "NT_ARM_VFP (arm VFP registers)";
	case 0x401: return "NT_ARM_TLS (arm TLS register)";
	case 0x406: return "NT_ARM_ADDR_MASK (arm address mask)";
	default: return (note_type_unknown(nt));
	}
}

static const char *
note_type_linux_core(unsigned int nt)
{
	switch (nt) {
	case 1: return "NT_PRSTATUS (Process status)";
	case 2: return "NT_FPREGSET (Floating point information)";
	case 3: return "NT_PRPSINFO (Process information)";
	case 4: return "NT_TASKSTRUCT (Task structure)";
	case 6: return "NT_AUXV (Auxiliary vector)";
	case 10: return "NT_PSTATUS (Linux process status)";
	case 12: return "NT_FPREGS (Linux floating point regset)";
	case 13: return "NT_PSINFO (Linux process information)";
	case 16: return "NT_LWPSTATUS (Linux lwpstatus_t type)";
	case 17: return "NT_LWPSINFO (Linux lwpinfo_t type)";
	case 18: return "NT_WIN32PSTATUS (win32_pstatus structure)";
	case 0x100: return "NT_PPC_VMX (ppc Altivec registers)";
	case 0x102: return "NT_PPC_VSX (ppc VSX registers)";
	case 0x202: return "NT_X86_XSTATE (x86 XSAVE extended state)";
	case 0x300: return "NT_S390_HIGH_GPRS (s390 upper register halves)";
	case 0x301: return "NT_S390_TIMER (s390 timer register)";
	case 0x302: return "NT_S390_TODCMP (s390 TOD comparator register)";
	case 0x303: return "NT_S390_TODPREG (s390 TOD programmable register)";
	case 0x304: return "NT_S390_CTRS (s390 control registers)";
	case 0x305: return "NT_S390_PREFIX (s390 prefix register)";
	case 0x400: return "NT_ARM_VFP (arm VFP registers)";
	case 0x401: return "NT_ARM_TLS (arm TLS register)";
	case 0x402: return "NT_ARM_HW_BREAK (arm hardware breakpoint registers)";
	case 0x403: return "NT_ARM_HW_WATCH (arm hardware watchpoint registers)";
	case 0x404: return "NT_ARM_SYSTEM_CALL (arm system call number)";
	case 0x405: return "NT_ARM_SVE (arm scalable vector extension registers)";
	case 0x406: return "NT_ARM_PAC_MASK (arm pointer authentication code mask)";
	case 0x407: return "NT_ARM_PACA_KEYS (arm pointer authentication address keys)";
	case 0x408: return "NT_ARM_PACG_KEYS (arm pointer authentication generic keys)";
	case 0x409: return "NT_ARM_TAGGED_ADDR_CTRL (arm64 tagged address control)";
	case 0x40a: return "NT_ARM_PAC_ENABLED_KEYS (arm64 ptr auth enabled keys)";
	case 0x46494c45UL: return "NT_FILE (mapped files)";
	case 0x46E62B7FUL: return "NT_PRXFPREG (Linux user_xfpregs structure)";
	case 0x53494749UL: return "NT_SIGINFO (siginfo_t data)";
	default: return (note_type_unknown(nt));
	}
}

static const char *
note_type_gnu(unsigned int nt)
{
	switch (nt) {
	case 1: return "NT_GNU_ABI_TAG";
	case 2: return "NT_GNU_HWCAP (Hardware capabilities)";
	case 3: return "NT_GNU_BUILD_ID (Build id set by ld(1))";
	case 4: return "NT_GNU_GOLD_VERSION (GNU gold version)";
	case 5: return "NT_GNU_PROPERTY_TYPE_0";
	default: return (note_type_unknown(nt));
	}
}

static const char *
note_type_go(unsigned int nt)
{
	switch (nt) {
	case 4: return "elfGoBuildIDTag";
	default: return (note_type_unknown(nt));
	}
}

static const char *
note_type_netbsd(unsigned int nt)
{
	switch (nt) {
	case 1: return "NT_NETBSD_IDENT";
	default: return (note_type_unknown(nt));
	}
}

static const char *
note_type_openbsd(unsigned int nt)
{
	switch (nt) {
	case 1: return "NT_OPENBSD_IDENT";
	default: return (note_type_unknown(nt));
	}
}

static const char *
note_type_unknown(unsigned int nt)
{
	static char s_nt[32];

	snprintf(s_nt, sizeof(s_nt),
	    nt >= 0x100 ? "<unknown: 0x%x>" : "<unknown: %u>", nt);
	return (s_nt);
}

static const char *
note_type_xen(unsigned int nt)
{
	switch (nt) {
	case 0: return "XEN_ELFNOTE_INFO";
	case 1: return "XEN_ELFNOTE_ENTRY";
	case 2: return "XEN_ELFNOTE_HYPERCALL_PAGE";
	case 3: return "XEN_ELFNOTE_VIRT_BASE";
	case 4: return "XEN_ELFNOTE_PADDR_OFFSET";
	case 5: return "XEN_ELFNOTE_XEN_VERSION";
	case 6: return "XEN_ELFNOTE_GUEST_OS";
	case 7: return "XEN_ELFNOTE_GUEST_VERSION";
	case 8: return "XEN_ELFNOTE_LOADER";
	case 9: return "XEN_ELFNOTE_PAE_MODE";
	case 10: return "XEN_ELFNOTE_FEATURES";
	case 11: return "XEN_ELFNOTE_BSD_SYMTAB";
	case 12: return "XEN_ELFNOTE_HV_START_LOW";
	case 13: return "XEN_ELFNOTE_L1_MFN_VALID";
	case 14: return "XEN_ELFNOTE_SUSPEND_CANCEL";
	case 15: return "XEN_ELFNOTE_INIT_P2M";
	case 16: return "XEN_ELFNOTE_MOD_START_PFN";
	case 17: return "XEN_ELFNOTE_SUPPORTED_FEATURES";
	case 18: return "XEN_ELFNOTE_PHYS32_ENTRY";
	default: return (note_type_unknown(nt));
	}
}

static struct {
	const char *name;
	int value;
} l_flag[] = {
	{"EXACT_MATCH", LL_EXACT_MATCH},
	{"IGNORE_INT_VER", LL_IGNORE_INT_VER},
	{"REQUIRE_MINOR", LL_REQUIRE_MINOR},
	{"EXPORTS", LL_EXPORTS},
	{"DELAY_LOAD", LL_DELAY_LOAD},
	{"DELTA", LL_DELTA},
	{NULL, 0}
};

static struct mips_option mips_exceptions_option[] = {
	{OEX_PAGE0, "PAGE0"},
	{OEX_SMM, "SMM"},
	{OEX_PRECISEFP, "PRECISEFP"},
	{OEX_DISMISS, "DISMISS"},
	{0, NULL}
};

static struct mips_option mips_pad_option[] = {
	{OPAD_PREFIX, "PREFIX"},
	{OPAD_POSTFIX, "POSTFIX"},
	{OPAD_SYMBOL, "SYMBOL"},
	{0, NULL}
};

static struct mips_option mips_hwpatch_option[] = {
	{OHW_R4KEOP, "R4KEOP"},
	{OHW_R8KPFETCH, "R8KPFETCH"},
	{OHW_R5KEOP, "R5KEOP"},
	{OHW_R5KCVTL, "R5KCVTL"},
	{0, NULL}
};

static struct mips_option mips_hwa_option[] = {
	{OHWA0_R4KEOP_CHECKED, "R4KEOP_CHECKED"},
	{OHWA0_R4KEOP_CLEAN, "R4KEOP_CLEAN"},
	{0, NULL}
};

static struct mips_option mips_hwo_option[] = {
	{OHWO0_FIXADE, "FIXADE"},
	{0, NULL}
};

static const char *
option_kind(uint8_t kind)
{
	static char s_kind[32];

	switch (kind) {
	case ODK_NULL: return "NULL";
	case ODK_REGINFO: return "REGINFO";
	case ODK_EXCEPTIONS: return "EXCEPTIONS";
	case ODK_PAD: return "PAD";
	case ODK_HWPATCH: return "HWPATCH";
	case ODK_FILL: return "FILL";
	case ODK_TAGS: return "TAGS";
	case ODK_HWAND: return "HWAND";
	case ODK_HWOR: return "HWOR";
	case ODK_GP_GROUP: return "GP_GROUP";
	case ODK_IDENT: return "IDENT";
	default:
		snprintf(s_kind, sizeof(s_kind), "<unknown: %u>", kind);
		return (s_kind);
	}
}

static const char *
top_tag(unsigned int tag)
{
	static char s_top_tag[32];

	switch (tag) {
	case 1: return "File Attributes";
	case 2: return "Section Attributes";
	case 3: return "Symbol Attributes";
	default:
		snprintf(s_top_tag, sizeof(s_top_tag), "Unknown tag: %u", tag);
		return (s_top_tag);
	}
}

static const char *
aeabi_cpu_arch(uint64_t arch)
{
	static char s_cpu_arch[32];

	switch (arch) {
	case 0: return "Pre-V4";
	case 1: return "ARM v4";
	case 2: return "ARM v4T";
	case 3: return "ARM v5T";
	case 4: return "ARM v5TE";
	case 5: return "ARM v5TEJ";
	case 6: return "ARM v6";
	case 7: return "ARM v6KZ";
	case 8: return "ARM v6T2";
	case 9: return "ARM v6K";
	case 10: return "ARM v7";
	case 11: return "ARM v6-M";
	case 12: return "ARM v6S-M";
	case 13: return "ARM v7E-M";
	default:
		snprintf(s_cpu_arch, sizeof(s_cpu_arch),
		    "Unknown (%ju)", (uintmax_t) arch);
		return (s_cpu_arch);
	}
}

static const char *
aeabi_cpu_arch_profile(uint64_t pf)
{
	static char s_arch_profile[32];

	switch (pf) {
	case 0:
		return "Not applicable";
	case 0x41:		/* 'A' */
		return "Application Profile";
	case 0x52:		/* 'R' */
		return "Real-Time Profile";
	case 0x4D:		/* 'M' */
		return "Microcontroller Profile";
	case 0x53:		/* 'S' */
		return "Application or Real-Time Profile";
	default:
		snprintf(s_arch_profile, sizeof(s_arch_profile),
		    "Unknown (%ju)\n", (uintmax_t) pf);
		return (s_arch_profile);
	}
}

static const char *
aeabi_arm_isa(uint64_t ai)
{
	static char s_ai[32];

	switch (ai) {
	case 0: return "No";
	case 1: return "Yes";
	default:
		snprintf(s_ai, sizeof(s_ai), "Unknown (%ju)\n",
		    (uintmax_t) ai);
		return (s_ai);
	}
}

static const char *
aeabi_thumb_isa(uint64_t ti)
{
	static char s_ti[32];

	switch (ti) {
	case 0: return "No";
	case 1: return "16-bit Thumb";
	case 2: return "32-bit Thumb";
	default:
		snprintf(s_ti, sizeof(s_ti), "Unknown (%ju)\n",
		    (uintmax_t) ti);
		return (s_ti);
	}
}

static const char *
aeabi_fp_arch(uint64_t fp)
{
	static char s_fp_arch[32];

	switch (fp) {
	case 0: return "No";
	case 1: return "VFPv1";
	case 2: return "VFPv2";
	case 3: return "VFPv3";
	case 4: return "VFPv3-D16";
	case 5: return "VFPv4";
	case 6: return "VFPv4-D16";
	default:
		snprintf(s_fp_arch, sizeof(s_fp_arch), "Unknown (%ju)",
		    (uintmax_t) fp);
		return (s_fp_arch);
	}
}

static const char *
aeabi_wmmx_arch(uint64_t wmmx)
{
	static char s_wmmx[32];

	switch (wmmx) {
	case 0: return "No";
	case 1: return "WMMXv1";
	case 2: return "WMMXv2";
	default:
		snprintf(s_wmmx, sizeof(s_wmmx), "Unknown (%ju)",
		    (uintmax_t) wmmx);
		return (s_wmmx);
	}
}

static const char *
aeabi_adv_simd_arch(uint64_t simd)
{
	static char s_simd[32];

	switch (simd) {
	case 0: return "No";
	case 1: return "NEONv1";
	case 2: return "NEONv2";
	default:
		snprintf(s_simd, sizeof(s_simd), "Unknown (%ju)",
		    (uintmax_t) simd);
		return (s_simd);
	}
}

static const char *
aeabi_pcs_config(uint64_t pcs)
{
	static char s_pcs[32];

	switch (pcs) {
	case 0: return "None";
	case 1: return "Bare platform";
	case 2: return "Linux";
	case 3: return "Linux DSO";
	case 4: return "Palm OS 2004";
	case 5: return "Palm OS (future)";
	case 6: return "Symbian OS 2004";
	case 7: return "Symbian OS (future)";
	default:
		snprintf(s_pcs, sizeof(s_pcs), "Unknown (%ju)",
		    (uintmax_t) pcs);
		return (s_pcs);
	}
}

static const char *
aeabi_pcs_r9(uint64_t r9)
{
	static char s_r9[32];

	switch (r9) {
	case 0: return "V6";
	case 1: return "SB";
	case 2: return "TLS pointer";
	case 3: return "Unused";
	default:
		snprintf(s_r9, sizeof(s_r9), "Unknown (%ju)", (uintmax_t) r9);
		return (s_r9);
	}
}

static const char *
aeabi_pcs_rw(uint64_t rw)
{
	static char s_rw[32];

	switch (rw) {
	case 0: return "Absolute";
	case 1: return "PC-relative";
	case 2: return "SB-relative";
	case 3: return "None";
	default:
		snprintf(s_rw, sizeof(s_rw), "Unknown (%ju)", (uintmax_t) rw);
		return (s_rw);
	}
}

static const char *
aeabi_pcs_ro(uint64_t ro)
{
	static char s_ro[32];

	switch (ro) {
	case 0: return "Absolute";
	case 1: return "PC-relative";
	case 2: return "None";
	default:
		snprintf(s_ro, sizeof(s_ro), "Unknown (%ju)", (uintmax_t) ro);
		return (s_ro);
	}
}

static const char *
aeabi_pcs_got(uint64_t got)
{
	static char s_got[32];

	switch (got) {
	case 0: return "None";
	case 1: return "direct";
	case 2: return "indirect via GOT";
	default:
		snprintf(s_got, sizeof(s_got), "Unknown (%ju)",
		    (uintmax_t) got);
		return (s_got);
	}
}

static const char *
aeabi_pcs_wchar_t(uint64_t wt)
{
	static char s_wt[32];

	switch (wt) {
	case 0: return "None";
	case 2: return "wchar_t size 2";
	case 4: return "wchar_t size 4";
	default:
		snprintf(s_wt, sizeof(s_wt), "Unknown (%ju)", (uintmax_t) wt);
		return (s_wt);
	}
}

static const char *
aeabi_enum_size(uint64_t es)
{
	static char s_es[32];

	switch (es) {
	case 0: return "None";
	case 1: return "smallest";
	case 2: return "32-bit";
	case 3: return "visible 32-bit";
	default:
		snprintf(s_es, sizeof(s_es), "Unknown (%ju)", (uintmax_t) es);
		return (s_es);
	}
}

static const char *
aeabi_align_needed(uint64_t an)
{
	static char s_align_n[64];

	switch (an) {
	case 0: return "No";
	case 1: return "8-byte align";
	case 2: return "4-byte align";
	case 3: return "Reserved";
	default:
		if (an >= 4 && an <= 12)
			snprintf(s_align_n, sizeof(s_align_n), "8-byte align"
			    " and up to 2^%ju-byte extended align",
			    (uintmax_t) an);
		else
			snprintf(s_align_n, sizeof(s_align_n), "Unknown (%ju)",
			    (uintmax_t) an);
		return (s_align_n);
	}
}

static const char *
aeabi_align_preserved(uint64_t ap)
{
	static char s_align_p[128];

	switch (ap) {
	case 0: return "No";
	case 1: return "8-byte align";
	case 2: return "8-byte align and SP % 8 == 0";
	case 3: return "Reserved";
	default:
		if (ap >= 4 && ap <= 12)
			snprintf(s_align_p, sizeof(s_align_p), "8-byte align"
			    " and SP %% 8 == 0 and up to 2^%ju-byte extended"
			    " align", (uintmax_t) ap);
		else
			snprintf(s_align_p, sizeof(s_align_p), "Unknown (%ju)",
			    (uintmax_t) ap);
		return (s_align_p);
	}
}

static const char *
aeabi_fp_rounding(uint64_t fr)
{
	static char s_fp_r[32];

	switch (fr) {
	case 0: return "Unused";
	case 1: return "Needed";
	default:
		snprintf(s_fp_r, sizeof(s_fp_r), "Unknown (%ju)",
		    (uintmax_t) fr);
		return (s_fp_r);
	}
}

static const char *
aeabi_fp_denormal(uint64_t fd)
{
	static char s_fp_d[32];

	switch (fd) {
	case 0: return "Unused";
	case 1: return "Needed";
	case 2: return "Sign Only";
	default:
		snprintf(s_fp_d, sizeof(s_fp_d), "Unknown (%ju)",
		    (uintmax_t) fd);
		return (s_fp_d);
	}
}

static const char *
aeabi_fp_exceptions(uint64_t fe)
{
	static char s_fp_e[32];

	switch (fe) {
	case 0: return "Unused";
	case 1: return "Needed";
	default:
		snprintf(s_fp_e, sizeof(s_fp_e), "Unknown (%ju)",
		    (uintmax_t) fe);
		return (s_fp_e);
	}
}

static const char *
aeabi_fp_user_exceptions(uint64_t fu)
{
	static char s_fp_u[32];

	switch (fu) {
	case 0: return "Unused";
	case 1: return "Needed";
	default:
		snprintf(s_fp_u, sizeof(s_fp_u), "Unknown (%ju)",
		    (uintmax_t) fu);
		return (s_fp_u);
	}
}

static const char *
aeabi_fp_number_model(uint64_t fn)
{
	static char s_fp_n[32];

	switch (fn) {
	case 0: return "Unused";
	case 1: return "IEEE 754 normal";
	case 2: return "RTABI";
	case 3: return "IEEE 754";
	default:
		snprintf(s_fp_n, sizeof(s_fp_n), "Unknown (%ju)",
		    (uintmax_t) fn);
		return (s_fp_n);
	}
}

static const char *
aeabi_fp_16bit_format(uint64_t fp16)
{
	static char s_fp_16[64];

	switch (fp16) {
	case 0: return "None";
	case 1: return "IEEE 754";
	case 2: return "VFPv3/Advanced SIMD (alternative format)";
	default:
		snprintf(s_fp_16, sizeof(s_fp_16), "Unknown (%ju)",
		    (uintmax_t) fp16);
		return (s_fp_16);
	}
}

static const char *
aeabi_mpext(uint64_t mp)
{
	static char s_mp[32];

	switch (mp) {
	case 0: return "Not allowed";
	case 1: return "Allowed";
	default:
		snprintf(s_mp, sizeof(s_mp), "Unknown (%ju)",
		    (uintmax_t) mp);
		return (s_mp);
	}
}

static const char *
aeabi_div(uint64_t du)
{
	static char s_du[32];

	switch (du) {
	case 0: return "Yes (V7-R/V7-M)";
	case 1: return "No";
	case 2: return "Yes (V7-A)";
	default:
		snprintf(s_du, sizeof(s_du), "Unknown (%ju)",
		    (uintmax_t) du);
		return (s_du);
	}
}

static const char *
aeabi_t2ee(uint64_t t2ee)
{
	static char s_t2ee[32];

	switch (t2ee) {
	case 0: return "Not allowed";
	case 1: return "Allowed";
	default:
		snprintf(s_t2ee, sizeof(s_t2ee), "Unknown(%ju)",
		    (uintmax_t) t2ee);
		return (s_t2ee);
	}

}

static const char *
aeabi_hardfp(uint64_t hfp)
{
	static char s_hfp[32];

	switch (hfp) {
	case 0: return "Tag_FP_arch";
	case 1: return "only SP";
	case 2: return "only DP";
	case 3: return "both SP and DP";
	default:
		snprintf(s_hfp, sizeof(s_hfp), "Unknown (%ju)",
		    (uintmax_t) hfp);
		return (s_hfp);
	}
}

static const char *
aeabi_vfp_args(uint64_t va)
{
	static char s_va[32];

	switch (va) {
	case 0: return "AAPCS (base variant)";
	case 1: return "AAPCS (VFP variant)";
	case 2: return "toolchain-specific";
	default:
		snprintf(s_va, sizeof(s_va), "Unknown (%ju)", (uintmax_t) va);
		return (s_va);
	}
}

static const char *
aeabi_wmmx_args(uint64_t wa)
{
	static char s_wa[32];

	switch (wa) {
	case 0: return "AAPCS (base variant)";
	case 1: return "Intel WMMX";
	case 2: return "toolchain-specific";
	default:
		snprintf(s_wa, sizeof(s_wa), "Unknown(%ju)", (uintmax_t) wa);
		return (s_wa);
	}
}

static const char *
aeabi_unaligned_access(uint64_t ua)
{
	static char s_ua[32];

	switch (ua) {
	case 0: return "Not allowed";
	case 1: return "Allowed";
	default:
		snprintf(s_ua, sizeof(s_ua), "Unknown(%ju)", (uintmax_t) ua);
		return (s_ua);
	}
}

static const char *
aeabi_fp_hpext(uint64_t fh)
{
	static char s_fh[32];

	switch (fh) {
	case 0: return "Not allowed";
	case 1: return "Allowed";
	default:
		snprintf(s_fh, sizeof(s_fh), "Unknown(%ju)", (uintmax_t) fh);
		return (s_fh);
	}
}

static const char *
aeabi_optm_goal(uint64_t og)
{
	static char s_og[32];

	switch (og) {
	case 0: return "None";
	case 1: return "Speed";
	case 2: return "Speed aggressive";
	case 3: return "Space";
	case 4: return "Space aggressive";
	case 5: return "Debugging";
	case 6: return "Best Debugging";
	default:
		snprintf(s_og, sizeof(s_og), "Unknown(%ju)", (uintmax_t) og);
		return (s_og);
	}
}

static const char *
aeabi_fp_optm_goal(uint64_t fog)
{
	static char s_fog[32];

	switch (fog) {
	case 0: return "None";
	case 1: return "Speed";
	case 2: return "Speed aggressive";
	case 3: return "Space";
	case 4: return "Space aggressive";
	case 5: return "Accurary";
	case 6: return "Best Accurary";
	default:
		snprintf(s_fog, sizeof(s_fog), "Unknown(%ju)",
		    (uintmax_t) fog);
		return (s_fog);
	}
}

static const char *
aeabi_virtual(uint64_t vt)
{
	static char s_virtual[64];

	switch (vt) {
	case 0: return "No";
	case 1: return "TrustZone";
	case 2: return "Virtualization extension";
	case 3: return "TrustZone and virtualization extension";
	default:
		snprintf(s_virtual, sizeof(s_virtual), "Unknown(%ju)",
		    (uintmax_t) vt);
		return (s_virtual);
	}
}

static struct {
	uint64_t tag;
	const char *s_tag;
	const char *(*get_desc)(uint64_t val);
} aeabi_tags[] = {
	{4, "Tag_CPU_raw_name", NULL},
	{5, "Tag_CPU_name", NULL},
	{6, "Tag_CPU_arch", aeabi_cpu_arch},
	{7, "Tag_CPU_arch_profile", aeabi_cpu_arch_profile},
	{8, "Tag_ARM_ISA_use", aeabi_arm_isa},
	{9, "Tag_THUMB_ISA_use", aeabi_thumb_isa},
	{10, "Tag_FP_arch", aeabi_fp_arch},
	{11, "Tag_WMMX_arch", aeabi_wmmx_arch},
	{12, "Tag_Advanced_SIMD_arch", aeabi_adv_simd_arch},
	{13, "Tag_PCS_config", aeabi_pcs_config},
	{14, "Tag_ABI_PCS_R9_use", aeabi_pcs_r9},
	{15, "Tag_ABI_PCS_RW_data", aeabi_pcs_rw},
	{16, "Tag_ABI_PCS_RO_data", aeabi_pcs_ro},
	{17, "Tag_ABI_PCS_GOT_use", aeabi_pcs_got},
	{18, "Tag_ABI_PCS_wchar_t", aeabi_pcs_wchar_t},
	{19, "Tag_ABI_FP_rounding", aeabi_fp_rounding},
	{20, "Tag_ABI_FP_denormal", aeabi_fp_denormal},
	{21, "Tag_ABI_FP_exceptions", aeabi_fp_exceptions},
	{22, "Tag_ABI_FP_user_exceptions", aeabi_fp_user_exceptions},
	{23, "Tag_ABI_FP_number_model", aeabi_fp_number_model},
	{24, "Tag_ABI_align_needed", aeabi_align_needed},
	{25, "Tag_ABI_align_preserved", aeabi_align_preserved},
	{26, "Tag_ABI_enum_size", aeabi_enum_size},
	{27, "Tag_ABI_HardFP_use", aeabi_hardfp},
	{28, "Tag_ABI_VFP_args", aeabi_vfp_args},
	{29, "Tag_ABI_WMMX_args", aeabi_wmmx_args},
	{30, "Tag_ABI_optimization_goals", aeabi_optm_goal},
	{31, "Tag_ABI_FP_optimization_goals", aeabi_fp_optm_goal},
	{32, "Tag_compatibility", NULL},
	{34, "Tag_CPU_unaligned_access", aeabi_unaligned_access},
	{36, "Tag_FP_HP_extension", aeabi_fp_hpext},
	{38, "Tag_ABI_FP_16bit_format", aeabi_fp_16bit_format},
	{42, "Tag_MPextension_use", aeabi_mpext},
	{44, "Tag_DIV_use", aeabi_div},
	{64, "Tag_nodefaults", NULL},
	{65, "Tag_also_compatible_with", NULL},
	{66, "Tag_T2EE_use", aeabi_t2ee},
	{67, "Tag_conformance", NULL},
	{68, "Tag_Virtualization_use", aeabi_virtual},
	{70, "Tag_MPextension_use", aeabi_mpext},
};

static const char *
mips_abi_fp(uint64_t fp)
{
	static char s_mips_abi_fp[64];

	switch (fp) {
	case 0: return "N/A";
	case 1: return "Hard float (double precision)";
	case 2: return "Hard float (single precision)";
	case 3: return "Soft float";
	case 4: return "64-bit float (-mips32r2 -mfp64)";
	default:
		snprintf(s_mips_abi_fp, sizeof(s_mips_abi_fp), "Unknown(%ju)",
		    (uintmax_t) fp);
		return (s_mips_abi_fp);
	}
}

static const char *
ppc_abi_fp(uint64_t fp)
{
	static char s_ppc_abi_fp[64];

	switch (fp) {
	case 0: return "N/A";
	case 1: return "Hard float (double precision)";
	case 2: return "Soft float";
	case 3: return "Hard float (single precision)";
	default:
		snprintf(s_ppc_abi_fp, sizeof(s_ppc_abi_fp), "Unknown(%ju)",
		    (uintmax_t) fp);
		return (s_ppc_abi_fp);
	}
}

static const char *
ppc_abi_vector(uint64_t vec)
{
	static char s_vec[64];

	switch (vec) {
	case 0: return "N/A";
	case 1: return "Generic purpose registers";
	case 2: return "AltiVec registers";
	case 3: return "SPE registers";
	default:
		snprintf(s_vec, sizeof(s_vec), "Unknown(%ju)", (uintmax_t) vec);
		return (s_vec);
	}
}

static const char *
dwarf_reg(unsigned int mach, unsigned int reg)
{

	switch (mach) {
	case EM_386:
	case EM_IAMCU:
		switch (reg) {
		case 0: return "eax";
		case 1: return "ecx";
		case 2: return "edx";
		case 3: return "ebx";
		case 4: return "esp";
		case 5: return "ebp";
		case 6: return "esi";
		case 7: return "edi";
		case 8: return "eip";
		case 9: return "eflags";
		case 11: return "st0";
		case 12: return "st1";
		case 13: return "st2";
		case 14: return "st3";
		case 15: return "st4";
		case 16: return "st5";
		case 17: return "st6";
		case 18: return "st7";
		case 21: return "xmm0";
		case 22: return "xmm1";
		case 23: return "xmm2";
		case 24: return "xmm3";
		case 25: return "xmm4";
		case 26: return "xmm5";
		case 27: return "xmm6";
		case 28: return "xmm7";
		case 29: return "mm0";
		case 30: return "mm1";
		case 31: return "mm2";
		case 32: return "mm3";
		case 33: return "mm4";
		case 34: return "mm5";
		case 35: return "mm6";
		case 36: return "mm7";
		case 37: return "fcw";
		case 38: return "fsw";
		case 39: return "mxcsr";
		case 40: return "es";
		case 41: return "cs";
		case 42: return "ss";
		case 43: return "ds";
		case 44: return "fs";
		case 45: return "gs";
		case 48: return "tr";
		case 49: return "ldtr";
		default: return (NULL);
		}
	case EM_RISCV:
		switch (reg) {
		case 0: return "zero";
		case 1: return "ra";
		case 2: return "sp";
		case 3: return "gp";
		case 4: return "tp";
		case 5: return "t0";
		case 6: return "t1";
		case 7: return "t2";
		case 8: return "s0";
		case 9: return "s1";
		case 10: return "a0";
		case 11: return "a1";
		case 12: return "a2";
		case 13: return "a3";
		case 14: return "a4";
		case 15: return "a5";
		case 16: return "a6";
		case 17: return "a7";
		case 18: return "s2";
		case 19: return "s3";
		case 20: return "s4";
		case 21: return "s5";
		case 22: return "s6";
		case 23: return "s7";
		case 24: return "s8";
		case 25: return "s9";
		case 26: return "s10";
		case 27: return "s11";
		case 28: return "t3";
		case 29: return "t4";
		case 30: return "t5";
		case 31: return "t6";
		case 32: return "ft0";
		case 33: return "ft1";
		case 34: return "ft2";
		case 35: return "ft3";
		case 36: return "ft4";
		case 37: return "ft5";
		case 38: return "ft6";
		case 39: return "ft7";
		case 40: return "fs0";
		case 41: return "fs1";
		case 42: return "fa0";
		case 43: return "fa1";
		case 44: return "fa2";
		case 45: return "fa3";
		case 46: return "fa4";
		case 47: return "fa5";
		case 48: return "fa6";
		case 49: return "fa7";
		case 50: return "fs2";
		case 51: return "fs3";
		case 52: return "fs4";
		case 53: return "fs5";
		case 54: return "fs6";
		case 55: return "fs7";
		case 56: return "fs8";
		case 57: return "fs9";
		case 58: return "fs10";
		case 59: return "fs11";
		case 60: return "ft8";
		case 61: return "ft9";
		case 62: return "ft10";
		case 63: return "ft11";
		default: return (NULL);
		}
	case EM_X86_64:
		switch (reg) {
		case 0: return "rax";
		case 1: return "rdx";
		case 2: return "rcx";
		case 3: return "rbx";
		case 4: return "rsi";
		case 5: return "rdi";
		case 6: return "rbp";
		case 7: return "rsp";
		case 16: return "rip";
		case 17: return "xmm0";
		case 18: return "xmm1";
		case 19: return "xmm2";
		case 20: return "xmm3";
		case 21: return "xmm4";
		case 22: return "xmm5";
		case 23: return "xmm6";
		case 24: return "xmm7";
		case 25: return "xmm8";
		case 26: return "xmm9";
		case 27: return "xmm10";
		case 28: return "xmm11";
		case 29: return "xmm12";
		case 30: return "xmm13";
		case 31: return "xmm14";
		case 32: return "xmm15";
		case 33: return "st0";
		case 34: return "st1";
		case 35: return "st2";
		case 36: return "st3";
		case 37: return "st4";
		case 38: return "st5";
		case 39: return "st6";
		case 40: return "st7";
		case 41: return "mm0";
		case 42: return "mm1";
		case 43: return "mm2";
		case 44: return "mm3";
		case 45: return "mm4";
		case 46: return "mm5";
		case 47: return "mm6";
		case 48: return "mm7";
		case 49: return "rflags";
		case 50: return "es";
		case 51: return "cs";
		case 52: return "ss";
		case 53: return "ds";
		case 54: return "fs";
		case 55: return "gs";
		case 58: return "fs.base";
		case 59: return "gs.base";
		case 62: return "tr";
		case 63: return "ldtr";
		case 64: return "mxcsr";
		case 65: return "fcw";
		case 66: return "fsw";
		default: return (NULL);
		}
	default:
		return (NULL);
	}
}

static void
dump_ehdr(struct readelf *re)
{
	size_t		 phnum, shnum, shstrndx;
	int		 i;

	printf("ELF Header:\n");

	/* e_ident[]. */
	printf("  Magic:   ");
	for (i = 0; i < EI_NIDENT; i++)
		printf("%.2x ", re->ehdr.e_ident[i]);
	putchar('\n');

	/* EI_CLASS. */
	printf("%-37s%s\n", "  Class:", elf_class(re->ehdr.e_ident[EI_CLASS]));

	/* EI_DATA. */
	printf("%-37s%s\n", "  Data:", elf_endian(re->ehdr.e_ident[EI_DATA]));

	/* EI_VERSION. */
	printf("%-37s%d %s\n", "  Version:", re->ehdr.e_ident[EI_VERSION],
	    elf_ver(re->ehdr.e_ident[EI_VERSION]));

	/* EI_OSABI. */
	printf("%-37s%s\n", "  OS/ABI:", elf_osabi(re->ehdr.e_ident[EI_OSABI]));

	/* EI_ABIVERSION. */
	printf("%-37s%d\n", "  ABI Version:", re->ehdr.e_ident[EI_ABIVERSION]);

	/* e_type. */
	printf("%-37s%s\n", "  Type:", elf_type(re->ehdr.e_type));

	/* e_machine. */
	printf("%-37s%s\n", "  Machine:", elf_machine(re->ehdr.e_machine));

	/* e_version. */
	printf("%-37s%#x\n", "  Version:", re->ehdr.e_version);

	/* e_entry. */
	printf("%-37s%#jx\n", "  Entry point address:",
	    (uintmax_t)re->ehdr.e_entry);

	/* e_phoff. */
	printf("%-37s%ju (bytes into file)\n", "  Start of program headers:",
	    (uintmax_t)re->ehdr.e_phoff);

	/* e_shoff. */
	printf("%-37s%ju (bytes into file)\n", "  Start of section headers:",
	    (uintmax_t)re->ehdr.e_shoff);

	/* e_flags. */
	printf("%-37s%#x", "  Flags:", re->ehdr.e_flags);
	dump_eflags(re, re->ehdr.e_flags);
	putchar('\n');

	/* e_ehsize. */
	printf("%-37s%u (bytes)\n", "  Size of this header:",
	    re->ehdr.e_ehsize);

	/* e_phentsize. */
	printf("%-37s%u (bytes)\n", "  Size of program headers:",
	    re->ehdr.e_phentsize);

	/* e_phnum. */
	printf("%-37s%u", "  Number of program headers:", re->ehdr.e_phnum);
	if (re->ehdr.e_phnum == PN_XNUM) {
		/* Extended program header numbering is in use. */
		if (elf_getphnum(re->elf, &phnum))
			printf(" (%zu)", phnum);
	}
	putchar('\n');

	/* e_shentsize. */
	printf("%-37s%u (bytes)\n", "  Size of section headers:",
	    re->ehdr.e_shentsize);

	/* e_shnum. */
	printf("%-37s%u", "  Number of section headers:", re->ehdr.e_shnum);
	if (re->ehdr.e_shnum == SHN_UNDEF) {
		/* Extended section numbering is in use. */
		if (elf_getshnum(re->elf, &shnum))
			printf(" (%ju)", (uintmax_t)shnum);
	}
	putchar('\n');

	/* e_shstrndx. */
	printf("%-37s%u", "  Section header string table index:",
	    re->ehdr.e_shstrndx);
	if (re->ehdr.e_shstrndx == SHN_XINDEX) {
		/* Extended section numbering is in use. */
		if (elf_getshstrndx(re->elf, &shstrndx))
			printf(" (%ju)", (uintmax_t)shstrndx);
	}
	putchar('\n');
}

static void
dump_eflags(struct readelf *re, uint64_t e_flags)
{
	struct eflags_desc *edesc;
	int arm_eabi;

	edesc = NULL;
	switch (re->ehdr.e_machine) {
	case EM_ARM:
		arm_eabi = (e_flags & EF_ARM_EABIMASK) >> 24;
		if (arm_eabi == 0)
			printf(", GNU EABI");
		else if (arm_eabi <= 5)
			printf(", Version%d EABI", arm_eabi);
		edesc = arm_eflags_desc;
		break;
	case EM_MIPS:
	case EM_MIPS_RS3_LE:
		switch ((e_flags & EF_MIPS_ARCH) >> 28) {
		case 0:	printf(", mips1"); break;
		case 1: printf(", mips2"); break;
		case 2: printf(", mips3"); break;
		case 3: printf(", mips4"); break;
		case 4: printf(", mips5"); break;
		case 5: printf(", mips32"); break;
		case 6: printf(", mips64"); break;
		case 7: printf(", mips32r2"); break;
		case 8: printf(", mips64r2"); break;
		default: break;
		}
		switch ((e_flags & 0x00FF0000) >> 16) {
		case 0x81: printf(", 3900"); break;
		case 0x82: printf(", 4010"); break;
		case 0x83: printf(", 4100"); break;
		case 0x85: printf(", 4650"); break;
		case 0x87: printf(", 4120"); break;
		case 0x88: printf(", 4111"); break;
		case 0x8a: printf(", sb1"); break;
		case 0x8b: printf(", octeon"); break;
		case 0x8c: printf(", xlr"); break;
		case 0x91: printf(", 5400"); break;
		case 0x98: printf(", 5500"); break;
		case 0x99: printf(", 9000"); break;
		case 0xa0: printf(", loongson-2e"); break;
		case 0xa1: printf(", loongson-2f"); break;
		default: break;
		}
		switch ((e_flags & 0x0000F000) >> 12) {
		case 1: printf(", o32"); break;
		case 2: printf(", o64"); break;
		case 3: printf(", eabi32"); break;
		case 4: printf(", eabi64"); break;
		default: break;
		}
		edesc = mips_eflags_desc;
		break;
	case EM_PPC64:
		switch (e_flags) {
		case 0: printf(", Unspecified or Power ELF V1 ABI"); break;
		case 1: printf(", Power ELF V1 ABI"); break;
		case 2: printf(", OpenPOWER ELF V2 ABI"); break;
		default: break;
		}
		/* FALLTHROUGH */
	case EM_PPC:
		edesc = powerpc_eflags_desc;
		break;
	case EM_RISCV:
		switch (e_flags & EF_RISCV_FLOAT_ABI_MASK) {
		case EF_RISCV_FLOAT_ABI_SOFT:
			printf(", soft-float ABI");
			break;
		case EF_RISCV_FLOAT_ABI_SINGLE:
			printf(", single-float ABI");
			break;
		case EF_RISCV_FLOAT_ABI_DOUBLE:
			printf(", double-float ABI");
			break;
		case EF_RISCV_FLOAT_ABI_QUAD:
			printf(", quad-float ABI");
			break;
		}
		edesc = riscv_eflags_desc;
		break;
	case EM_SPARC:
	case EM_SPARC32PLUS:
	case EM_SPARCV9:
		switch ((e_flags & EF_SPARCV9_MM)) {
		case EF_SPARCV9_TSO: printf(", tso"); break;
		case EF_SPARCV9_PSO: printf(", pso"); break;
		case EF_SPARCV9_MM: printf(", rmo"); break;
		default: break;
		}
		edesc = sparc_eflags_desc;
		break;
	default:
		break;
	}

	if (edesc != NULL) {
		while (edesc->desc != NULL) {
			if (e_flags & edesc->flag)
				printf(", %s", edesc->desc);
			edesc++;
		}
	}
}

static void
dump_phdr(struct readelf *re)
{
	const char	*rawfile;
	GElf_Phdr	 phdr;
	size_t		 phnum, size;
	int		 i, j;

#define	PH_HDR	"Type", "Offset", "VirtAddr", "PhysAddr", "FileSiz",	\
		"MemSiz", "Flg", "Align"
#define	PH_CT	phdr_type(re->ehdr.e_machine, phdr.p_type),		\
		(uintmax_t)phdr.p_offset, (uintmax_t)phdr.p_vaddr,	\
		(uintmax_t)phdr.p_paddr, (uintmax_t)phdr.p_filesz,	\
		(uintmax_t)phdr.p_memsz,				\
		phdr.p_flags & PF_R ? 'R' : ' ',			\
		phdr.p_flags & PF_W ? 'W' : ' ',			\
		phdr.p_flags & PF_X ? 'E' : ' ',			\
		(uintmax_t)phdr.p_align

	if (elf_getphnum(re->elf, &phnum) == 0) {
		warnx("elf_getphnum failed: %s", elf_errmsg(-1));
		return;
	}
	if (phnum == 0) {
		printf("\nThere are no program headers in this file.\n");
		return;
	}

	printf("\nElf file type is %s", elf_type(re->ehdr.e_type));
	printf("\nEntry point 0x%jx\n", (uintmax_t)re->ehdr.e_entry);
	printf("There are %ju program headers, starting at offset %ju\n",
	    (uintmax_t)phnum, (uintmax_t)re->ehdr.e_phoff);

	/* Dump program headers. */
	printf("\nProgram Headers:\n");
	if (re->ec == ELFCLASS32)
		printf("  %-15s%-9s%-11s%-11s%-8s%-8s%-4s%s\n", PH_HDR);
	else if (re->options & RE_WW)
		printf("  %-15s%-9s%-19s%-19s%-9s%-9s%-4s%s\n", PH_HDR);
	else
		printf("  %-15s%-19s%-19s%s\n                 %-19s%-20s"
		    "%-7s%s\n", PH_HDR);
	for (i = 0; (size_t) i < phnum; i++) {
		if (gelf_getphdr(re->elf, i, &phdr) != &phdr) {
			warnx("gelf_getphdr failed: %s", elf_errmsg(-1));
			continue;
		}
		/* TODO: Add arch-specific segment type dump. */
		if (re->ec == ELFCLASS32)
			printf("  %-14.14s 0x%6.6jx 0x%8.8jx 0x%8.8jx "
			    "0x%5.5jx 0x%5.5jx %c%c%c %#jx\n", PH_CT);
		else if (re->options & RE_WW)
			printf("  %-14.14s 0x%6.6jx 0x%16.16jx 0x%16.16jx "
			    "0x%6.6jx 0x%6.6jx %c%c%c %#jx\n", PH_CT);
		else
			printf("  %-14.14s 0x%16.16jx 0x%16.16jx 0x%16.16jx\n"
			    "                 0x%16.16jx 0x%16.16jx  %c%c%c"
			    "    %#jx\n", PH_CT);
		if (phdr.p_type == PT_INTERP) {
			if ((rawfile = elf_rawfile(re->elf, &size)) == NULL) {
				warnx("elf_rawfile failed: %s", elf_errmsg(-1));
				continue;
			}
			if (phdr.p_offset >= size) {
				warnx("invalid program header offset");
				continue;
			}
			printf("      [Requesting program interpreter: %s]\n",
				rawfile + phdr.p_offset);
		}
	}

	/* Dump section to segment mapping. */
	if (re->shnum == 0)
		return;
	printf("\n Section to Segment mapping:\n");
	printf("  Segment Sections...\n");
	for (i = 0; (size_t)i < phnum; i++) {
		if (gelf_getphdr(re->elf, i, &phdr) != &phdr) {
			warnx("gelf_getphdr failed: %s", elf_errmsg(-1));
			continue;
		}
		printf("   %2.2d     ", i);
		/* skip NULL section. */
		for (j = 1; (size_t)j < re->shnum; j++) {
			if (re->sl[j].off < phdr.p_offset)
				continue;
			if (re->sl[j].off + re->sl[j].sz >
			    phdr.p_offset + phdr.p_filesz &&
			    re->sl[j].type != SHT_NOBITS)
				continue;
			if (re->sl[j].addr < phdr.p_vaddr ||
			    re->sl[j].addr + re->sl[j].sz >
			    phdr.p_vaddr + phdr.p_memsz)
				continue;
			if (phdr.p_type == PT_TLS &&
			    (re->sl[j].flags & SHF_TLS) == 0)
				continue;
			printf("%s ", re->sl[j].name);
		}
		printf("\n");
	}
#undef	PH_HDR
#undef	PH_CT
}

static char *
section_flags(struct readelf *re, struct section *s)
{
#define BUF_SZ 256
	static char	buf[BUF_SZ];
	int		i, p, nb;

	p = 0;
	nb = re->ec == ELFCLASS32 ? 8 : 16;
	if (re->options & RE_T) {
		snprintf(buf, BUF_SZ, "[%*.*jx]: ", nb, nb,
		    (uintmax_t)s->flags);
		p += nb + 4;
	}
	for (i = 0; section_flag[i].ln != NULL; i++) {
		if ((s->flags & section_flag[i].value) == 0)
			continue;
		if (re->options & RE_T) {
			snprintf(&buf[p], BUF_SZ - p, "%s, ",
			    section_flag[i].ln);
			p += strlen(section_flag[i].ln) + 2;
		} else
			buf[p++] = section_flag[i].sn;
	}
	if (re->options & RE_T && p > nb + 4)
		p -= 2;
	buf[p] = '\0';

	return (buf);
}

static void
dump_shdr(struct readelf *re)
{
	struct section	*s;
	int		 i;

#define	S_HDR	"[Nr] Name", "Type", "Addr", "Off", "Size", "ES",	\
		"Flg", "Lk", "Inf", "Al"
#define	S_HDRL	"[Nr] Name", "Type", "Address", "Offset", "Size",	\
		"EntSize", "Flags", "Link", "Info", "Align"
#define	ST_HDR	"[Nr] Name", "Type", "Addr", "Off", "Size", "ES",	\
		"Lk", "Inf", "Al", "Flags"
#define	ST_HDRL	"[Nr] Name", "Type", "Address", "Offset", "Link",	\
		"Size", "EntSize", "Info", "Align", "Flags"
#define	S_CT	i, s->name, section_type(re->ehdr.e_machine, s->type),	\
		(uintmax_t)s->addr, (uintmax_t)s->off, (uintmax_t)s->sz,\
		(uintmax_t)s->entsize, section_flags(re, s),		\
		s->link, s->info, (uintmax_t)s->align
#define	ST_CT	i, s->name, section_type(re->ehdr.e_machine, s->type),  \
		(uintmax_t)s->addr, (uintmax_t)s->off, (uintmax_t)s->sz,\
		(uintmax_t)s->entsize, s->link, s->info,		\
		(uintmax_t)s->align, section_flags(re, s)
#define	ST_CTL	i, s->name, section_type(re->ehdr.e_machine, s->type),  \
		(uintmax_t)s->addr, (uintmax_t)s->off, s->link,		\
		(uintmax_t)s->sz, (uintmax_t)s->entsize, s->info,	\
		(uintmax_t)s->align, section_flags(re, s)

	if (re->shnum == 0) {
		printf("\nThere are no sections in this file.\n");
		return;
	}
	printf("There are %ju section headers, starting at offset 0x%jx:\n",
	    (uintmax_t)re->shnum, (uintmax_t)re->ehdr.e_shoff);
	printf("\nSection Headers:\n");
	if (re->ec == ELFCLASS32) {
		if (re->options & RE_T)
			printf("  %s\n       %-16s%-9s%-7s%-7s%-5s%-3s%-4s%s\n"
			    "%12s\n", ST_HDR);
		else
			printf("  %-23s%-16s%-9s%-7s%-7s%-3s%-4s%-3s%-4s%s\n",
			    S_HDR);
	} else if (re->options & RE_WW) {
		if (re->options & RE_T)
			printf("  %s\n       %-16s%-17s%-7s%-7s%-5s%-3s%-4s%s\n"
			    "%12s\n", ST_HDR);
		else
			printf("  %-23s%-16s%-17s%-7s%-7s%-3s%-4s%-3s%-4s%s\n",
			    S_HDR);
	} else {
		if (re->options & RE_T)
			printf("  %s\n       %-18s%-17s%-18s%s\n       %-18s"
			    "%-17s%-18s%s\n%12s\n", ST_HDRL);
		else
			printf("  %-23s%-17s%-18s%s\n       %-18s%-17s%-7s%"
			    "-6s%-6s%s\n", S_HDRL);
	}
	for (i = 0; (size_t)i < re->shnum; i++) {
		s = &re->sl[i];
		if (re->ec == ELFCLASS32) {
			if (re->options & RE_T)
				printf("  [%2d] %s\n       %-15.15s %8.8jx"
				    " %6.6jx %6.6jx %2.2jx  %2u %3u %2ju\n"
				    "       %s\n", ST_CT);
			else
				if (re->options & RE_WW)
					printf("  [%2d] %-17s %-15.15s "
					    "%8.8jx %6.6jx %6.6jx %2.2jx %3s "
					    "%2u %3u %2ju\n", S_CT);
				else
					printf("  [%2d] %-17.17s %-15.15s "
					    "%8.8jx %6.6jx %6.6jx %2.2jx %3s "
					    "%2u %3u %2ju\n", S_CT);
		} else if (re->options & RE_WW) {
			if (re->options & RE_T)
				printf("  [%2d] %s\n       %-15.15s %16.16jx"
				    " %6.6jx %6.6jx %2.2jx  %2u %3u %2ju\n"
				    "       %s\n", ST_CT);
			else
				printf("  [%2d] %-17s %-15.15s %16.16jx"
				    " %6.6jx %6.6jx %2.2jx %3s %2u %3u %2ju\n",
				    S_CT);
		} else {
			if (re->options & RE_T)
				printf("  [%2d] %s\n       %-15.15s  %16.16jx"
				    "  %16.16jx  %u\n       %16.16jx %16.16jx"
				    "  %-16u  %ju\n       %s\n", ST_CTL);
			else
				printf("  [%2d] %-17.17s %-15.15s  %16.16jx"
				    "  %8.8jx\n       %16.16jx  %16.16jx "
				    "%3s      %2u   %3u     %ju\n", S_CT);
		}
	}
	if ((re->options & RE_T) == 0)
		printf("Key to Flags:\n  W (write), A (alloc),"
		    " X (execute), M (merge), S (strings)\n"
		    "  I (info), L (link order), G (group), x (unknown)\n"
		    "  O (extra OS processing required)"
		    " o (OS specific), p (processor specific)\n");

#undef	S_HDR
#undef	S_HDRL
#undef	ST_HDR
#undef	ST_HDRL
#undef	S_CT
#undef	ST_CT
#undef	ST_CTL
}

/*
 * Return number of entries in the given section. We'd prefer ent_count be a
 * size_t *, but libelf APIs already use int for section indices.
 */
static int
get_ent_count(struct section *s, int *ent_count)
{
	if (s->entsize == 0) {
		warnx("section %s has entry size 0", s->name);
		return (0);
	} else if (s->sz / s->entsize > INT_MAX) {
		warnx("section %s has invalid section count", s->name);
		return (0);
	}
	*ent_count = (int)(s->sz / s->entsize);
	return (1);
}

static void
dump_dynamic(struct readelf *re)
{
	GElf_Dyn	 dyn;
	Elf_Data	*d;
	struct section	*s;
	int		 elferr, i, is_dynamic, j, jmax, nentries;

	is_dynamic = 0;

	for (i = 0; (size_t)i < re->shnum; i++) {
		s = &re->sl[i];
		if (s->type != SHT_DYNAMIC)
			continue;
		(void) elf_errno();
		if ((d = elf_getdata(s->scn, NULL)) == NULL) {
			elferr = elf_errno();
			if (elferr != 0)
				warnx("elf_getdata failed: %s", elf_errmsg(-1));
			continue;
		}
		if (d->d_size <= 0)
			continue;

		is_dynamic = 1;

		/* Determine the actual number of table entries. */
		nentries = 0;
		if (!get_ent_count(s, &jmax))
			continue;
		for (j = 0; j < jmax; j++) {
			if (gelf_getdyn(d, j, &dyn) != &dyn) {
				warnx("gelf_getdyn failed: %s",
				    elf_errmsg(-1));
				continue;
			}
			nentries ++;
			if (dyn.d_tag == DT_NULL)
				break;
                }

		printf("\nDynamic section at offset 0x%jx", (uintmax_t)s->off);
		printf(" contains %u entries:\n", nentries);

		if (re->ec == ELFCLASS32)
			printf("%5s%12s%28s\n", "Tag", "Type", "Name/Value");
		else
			printf("%5s%20s%28s\n", "Tag", "Type", "Name/Value");

		for (j = 0; j < nentries; j++) {
			if (gelf_getdyn(d, j, &dyn) != &dyn)
				continue;
			/* Dump dynamic entry type. */
			if (re->ec == ELFCLASS32)
				printf(" 0x%8.8jx", (uintmax_t)dyn.d_tag);
			else
				printf(" 0x%16.16jx", (uintmax_t)dyn.d_tag);
			printf(" %-20s", dt_type(re->ehdr.e_machine,
			    dyn.d_tag));
			/* Dump dynamic entry value. */
			dump_dyn_val(re, &dyn, s->link);
		}
	}

	if (!is_dynamic)
		printf("\nThere is no dynamic section in this file.\n");
}

static char *
timestamp(time_t ti)
{
	static char ts[32];
	struct tm *t;

	t = gmtime(&ti);
	snprintf(ts, sizeof(ts), "%04d-%02d-%02dT%02d:%02d:%02d",
	    t->tm_year + 1900, t->tm_mon + 1, t->tm_mday, t->tm_hour,
	    t->tm_min, t->tm_sec);

	return (ts);
}

static const char *
dyn_str(struct readelf *re, uint32_t stab, uint64_t d_val)
{
	const char *name;

	if (stab == SHN_UNDEF)
		name = "ERROR";
	else if ((name = elf_strptr(re->elf, stab, d_val)) == NULL) {
		(void) elf_errno(); /* clear error */
		name = "ERROR";
	}

	return (name);
}

static void
dump_arch_dyn_val(struct readelf *re, GElf_Dyn *dyn)
{
	switch (re->ehdr.e_machine) {
	case EM_MIPS:
	case EM_MIPS_RS3_LE:
		switch (dyn->d_tag) {
		case DT_MIPS_RLD_VERSION:
		case DT_MIPS_LOCAL_GOTNO:
		case DT_MIPS_CONFLICTNO:
		case DT_MIPS_LIBLISTNO:
		case DT_MIPS_SYMTABNO:
		case DT_MIPS_UNREFEXTNO:
		case DT_MIPS_GOTSYM:
		case DT_MIPS_HIPAGENO:
		case DT_MIPS_DELTA_CLASS_NO:
		case DT_MIPS_DELTA_INSTANCE_NO:
		case DT_MIPS_DELTA_RELOC_NO:
		case DT_MIPS_DELTA_SYM_NO:
		case DT_MIPS_DELTA_CLASSSYM_NO:
		case DT_MIPS_LOCALPAGE_GOTIDX:
		case DT_MIPS_LOCAL_GOTIDX:
		case DT_MIPS_HIDDEN_GOTIDX:
		case DT_MIPS_PROTECTED_GOTIDX:
			printf(" %ju\n", (uintmax_t) dyn->d_un.d_val);
			break;
		case DT_MIPS_ICHECKSUM:
		case DT_MIPS_FLAGS:
		case DT_MIPS_BASE_ADDRESS:
		case DT_MIPS_CONFLICT:
		case DT_MIPS_LIBLIST:
		case DT_MIPS_RLD_MAP:
		case DT_MIPS_DELTA_CLASS:
		case DT_MIPS_DELTA_INSTANCE:
		case DT_MIPS_DELTA_RELOC:
		case DT_MIPS_DELTA_SYM:
		case DT_MIPS_DELTA_CLASSSYM:
		case DT_MIPS_CXX_FLAGS:
		case DT_MIPS_PIXIE_INIT:
		case DT_MIPS_SYMBOL_LIB:
		case DT_MIPS_OPTIONS:
		case DT_MIPS_INTERFACE:
		case DT_MIPS_DYNSTR_ALIGN:
		case DT_MIPS_INTERFACE_SIZE:
		case DT_MIPS_RLD_TEXT_RESOLVE_ADDR:
		case DT_MIPS_COMPACT_SIZE:
		case DT_MIPS_GP_VALUE:
		case DT_MIPS_AUX_DYNAMIC:
		case DT_MIPS_PLTGOT:
		case DT_MIPS_RLD_OBJ_UPDATE:
		case DT_MIPS_RWPLT:
			printf(" 0x%jx\n", (uintmax_t) dyn->d_un.d_val);
			break;
		case DT_MIPS_IVERSION:
		case DT_MIPS_PERF_SUFFIX:
		case DT_MIPS_TIME_STAMP:
			printf(" %s\n", timestamp(dyn->d_un.d_val));
			break;
		default:
			printf("\n");
			break;
		}
		break;
	default:
		printf("\n");
		break;
	}
}

static void
dump_flags(struct flag_desc *desc, uint64_t val)
{
	struct flag_desc *fd;

	for (fd = desc; fd->flag != 0; fd++) {
		if (val & fd->flag) {
			val &= ~fd->flag;
			printf(" %s", fd->desc);
		}
	}
	if (val != 0)
		printf(" unknown (0x%jx)", (uintmax_t)val);
	printf("\n");
}

static struct flag_desc dt_flags[] = {
	{ DF_ORIGIN,		"ORIGIN" },
	{ DF_SYMBOLIC,		"SYMBOLIC" },
	{ DF_TEXTREL,		"TEXTREL" },
	{ DF_BIND_NOW,		"BIND_NOW" },
	{ DF_STATIC_TLS,	"STATIC_TLS" },
	{ 0, NULL }
};

static struct flag_desc dt_flags_1[] = {
	{ DF_1_BIND_NOW,	"NOW" },
	{ DF_1_GLOBAL,		"GLOBAL" },
	{ 0x4,			"GROUP" },
	{ DF_1_NODELETE,	"NODELETE" },
	{ DF_1_LOADFLTR,	"LOADFLTR" },
	{ 0x20,			"INITFIRST" },
	{ DF_1_NOOPEN,		"NOOPEN" },
	{ DF_1_ORIGIN,		"ORIGIN" },
	{ 0x100,		"DIRECT" },
	{ DF_1_INTERPOSE,	"INTERPOSE" },
	{ DF_1_NODEFLIB,	"NODEFLIB" },
	{ 0x1000,		"NODUMP" },
	{ 0x2000,		"CONFALT" },
	{ 0x4000,		"ENDFILTEE" },
	{ 0x8000,		"DISPRELDNE" },
	{ 0x10000,		"DISPRELPND" },
	{ 0x20000,		"NODIRECT" },
	{ 0x40000,		"IGNMULDEF" },
	{ 0x80000,		"NOKSYMS" },
	{ 0x100000,		"NOHDR" },
	{ 0x200000,		"EDITED" },
	{ 0x400000,		"NORELOC" },
	{ 0x800000,		"SYMINTPOSE" },
	{ 0x1000000,		"GLOBAUDIT" },
	{ 0x02000000,		"SINGLETON" },
	{ 0x04000000,		"STUB" },
	{ DF_1_PIE,		"PIE" },
	{ 0, NULL }
};

static void
dump_dyn_val(struct readelf *re, GElf_Dyn *dyn, uint32_t stab)
{
	const char *name;

	if (dyn->d_tag >= DT_LOPROC && dyn->d_tag <= DT_HIPROC &&
	    dyn->d_tag != DT_AUXILIARY && dyn->d_tag != DT_FILTER) {
		dump_arch_dyn_val(re, dyn);
		return;
	}

	/* These entry values are index into the string table. */
	name = NULL;
	if (dyn->d_tag == DT_AUXILIARY || dyn->d_tag == DT_FILTER ||
	    dyn->d_tag == DT_NEEDED || dyn->d_tag == DT_SONAME ||
	    dyn->d_tag == DT_RPATH || dyn->d_tag == DT_RUNPATH)
		name = dyn_str(re, stab, dyn->d_un.d_val);

	switch(dyn->d_tag) {
	case DT_NULL:
	case DT_PLTGOT:
	case DT_HASH:
	case DT_STRTAB:
	case DT_SYMTAB:
	case DT_RELA:
	case DT_INIT:
	case DT_SYMBOLIC:
	case DT_REL:
	case DT_DEBUG:
	case DT_TEXTREL:
	case DT_JMPREL:
	case DT_FINI:
	case DT_VERDEF:
	case DT_VERNEED:
	case DT_VERSYM:
	case DT_GNU_HASH:
	case DT_GNU_LIBLIST:
	case DT_GNU_CONFLICT:
		printf(" 0x%jx\n", (uintmax_t) dyn->d_un.d_val);
		break;
	case DT_PLTRELSZ:
	case DT_RELASZ:
	case DT_RELAENT:
	case DT_STRSZ:
	case DT_SYMENT:
	case DT_RELSZ:
	case DT_RELENT:
	case DT_PREINIT_ARRAYSZ:
	case DT_INIT_ARRAYSZ:
	case DT_FINI_ARRAYSZ:
	case DT_GNU_CONFLICTSZ:
	case DT_GNU_LIBLISTSZ:
		printf(" %ju (bytes)\n", (uintmax_t) dyn->d_un.d_val);
		break;
 	case DT_RELACOUNT:
	case DT_RELCOUNT:
	case DT_VERDEFNUM:
	case DT_VERNEEDNUM:
		printf(" %ju\n", (uintmax_t) dyn->d_un.d_val);
		break;
	case DT_AUXILIARY:
		printf(" Auxiliary library: [%s]\n", name);
		break;
	case DT_FILTER:
		printf(" Filter library: [%s]\n", name);
		break;
	case DT_NEEDED:
		printf(" Shared library: [%s]\n", name);
		break;
	case DT_SONAME:
		printf(" Library soname: [%s]\n", name);
		break;
	case DT_RPATH:
		printf(" Library rpath: [%s]\n", name);
		break;
	case DT_RUNPATH:
		printf(" Library runpath: [%s]\n", name);
		break;
	case DT_PLTREL:
		printf(" %s\n", dt_type(re->ehdr.e_machine, dyn->d_un.d_val));
		break;
	case DT_GNU_PRELINKED:
		printf(" %s\n", timestamp(dyn->d_un.d_val));
		break;
	case DT_FLAGS:
		dump_flags(dt_flags, dyn->d_un.d_val);
		break;
	case DT_FLAGS_1:
		dump_flags(dt_flags_1, dyn->d_un.d_val);
		break;
	default:
		printf("\n");
	}
}

static void
dump_rel(struct readelf *re, struct section *s, Elf_Data *d)
{
	GElf_Rel r;
	const char *symname;
	uint64_t symval;
	int i, len;
	uint32_t type;
	uint8_t type2, type3;

	if (s->link >= re->shnum)
		return;

#define	REL_HDR "r_offset", "r_info", "r_type", "st_value", "st_name"
#define	REL_CT32 (uintmax_t)r.r_offset, (uintmax_t)r.r_info,	    \
		elftc_reloc_type_str(re->ehdr.e_machine,	    \
		ELF32_R_TYPE(r.r_info)), (uintmax_t)symval, symname
#define	REL_CT64 (uintmax_t)r.r_offset, (uintmax_t)r.r_info,	    \
		elftc_reloc_type_str(re->ehdr.e_machine, type),	    \
		(uintmax_t)symval, symname

	printf("\nRelocation section (%s):\n", s->name);
	if (re->ec == ELFCLASS32)
		printf("%-8s %-8s %-19s %-8s %s\n", REL_HDR);
	else {
		if (re->options & RE_WW)
			printf("%-16s %-16s %-24s %-16s %s\n", REL_HDR);
		else
			printf("%-12s %-12s %-19s %-16s %s\n", REL_HDR);
	}
	assert(d->d_size == s->sz);
	if (!get_ent_count(s, &len))
		return;
	for (i = 0; i < len; i++) {
		if (gelf_getrel(d, i, &r) != &r) {
			warnx("gelf_getrel failed: %s", elf_errmsg(-1));
			continue;
		}
		symname = get_symbol_name(re, s->link, GELF_R_SYM(r.r_info));
		symval = get_symbol_value(re, s->link, GELF_R_SYM(r.r_info));
		if (re->ec == ELFCLASS32) {
			r.r_info = ELF32_R_INFO(ELF64_R_SYM(r.r_info),
			    ELF64_R_TYPE(r.r_info));
			printf("%8.8jx %8.8jx %-19.19s %8.8jx %s\n", REL_CT32);
		} else {
			type = ELF64_R_TYPE(r.r_info);
			if (re->ehdr.e_machine == EM_MIPS) {
				type2 = (type >> 8) & 0xFF;
				type3 = (type >> 16) & 0xFF;
				type = type & 0xFF;
			} else {
				type2 = type3 = 0;
			}
			if (re->options & RE_WW)
				printf("%16.16jx %16.16jx %-24.24s"
				    " %16.16jx %s\n", REL_CT64);
			else
				printf("%12.12jx %12.12jx %-19.19s"
				    " %16.16jx %s\n", REL_CT64);
			if (re->ehdr.e_machine == EM_MIPS) {
				if (re->options & RE_WW) {
					printf("%32s: %s\n", "Type2",
					    elftc_reloc_type_str(EM_MIPS,
					    type2));
					printf("%32s: %s\n", "Type3",
					    elftc_reloc_type_str(EM_MIPS,
					    type3));
				} else {
					printf("%24s: %s\n", "Type2",
					    elftc_reloc_type_str(EM_MIPS,
					    type2));
					printf("%24s: %s\n", "Type3",
					    elftc_reloc_type_str(EM_MIPS,
					    type3));
				}
			}
		}
	}

#undef	REL_HDR
#undef	REL_CT
}

static void
dump_rela(struct readelf *re, struct section *s, Elf_Data *d)
{
	GElf_Rela r;
	const char *symname;
	uint64_t symval;
	int i, len;
	uint32_t type;
	uint8_t type2, type3;

	if (s->link >= re->shnum)
		return;

#define	RELA_HDR "r_offset", "r_info", "r_type", "st_value", \
		"st_name + r_addend"
#define	RELA_CT32 (uintmax_t)r.r_offset, (uintmax_t)r.r_info,	    \
		elftc_reloc_type_str(re->ehdr.e_machine,	    \
		ELF32_R_TYPE(r.r_info)), (uintmax_t)symval, symname
#define	RELA_CT64 (uintmax_t)r.r_offset, (uintmax_t)r.r_info,	    \
		elftc_reloc_type_str(re->ehdr.e_machine, type),	    \
		(uintmax_t)symval, symname

	printf("\nRelocation section with addend (%s):\n", s->name);
	if (re->ec == ELFCLASS32)
		printf("%-8s %-8s %-19s %-8s %s\n", RELA_HDR);
	else {
		if (re->options & RE_WW)
			printf("%-16s %-16s %-24s %-16s %s\n", RELA_HDR);
		else
			printf("%-12s %-12s %-19s %-16s %s\n", RELA_HDR);
	}
	assert(d->d_size == s->sz);
	if (!get_ent_count(s, &len))
		return;
	for (i = 0; i < len; i++) {
		if (gelf_getrela(d, i, &r) != &r) {
			warnx("gelf_getrel failed: %s", elf_errmsg(-1));
			continue;
		}
		symname = get_symbol_name(re, s->link, GELF_R_SYM(r.r_info));
		symval = get_symbol_value(re, s->link, GELF_R_SYM(r.r_info));
		if (re->ec == ELFCLASS32) {
			r.r_info = ELF32_R_INFO(ELF64_R_SYM(r.r_info),
			    ELF64_R_TYPE(r.r_info));
			printf("%8.8jx %8.8jx %-19.19s %8.8jx %s", RELA_CT32);
			printf(" + %x\n", (uint32_t) r.r_addend);
		} else {
			type = ELF64_R_TYPE(r.r_info);
			if (re->ehdr.e_machine == EM_MIPS) {
				type2 = (type >> 8) & 0xFF;
				type3 = (type >> 16) & 0xFF;
				type = type & 0xFF;
			} else {
				type2 = type3 = 0;
			}
			if (re->options & RE_WW)
				printf("%16.16jx %16.16jx %-24.24s"
				    " %16.16jx %s", RELA_CT64);
			else
				printf("%12.12jx %12.12jx %-19.19s"
				    " %16.16jx %s", RELA_CT64);
			printf(" + %jx\n", (uintmax_t) r.r_addend);
			if (re->ehdr.e_machine == EM_MIPS) {
				if (re->options & RE_WW) {
					printf("%32s: %s\n", "Type2",
					    elftc_reloc_type_str(EM_MIPS,
					    type2));
					printf("%32s: %s\n", "Type3",
					    elftc_reloc_type_str(EM_MIPS,
					    type3));
				} else {
					printf("%24s: %s\n", "Type2",
					    elftc_reloc_type_str(EM_MIPS,
					    type2));
					printf("%24s: %s\n", "Type3",
					    elftc_reloc_type_str(EM_MIPS,
					    type3));
				}
			}
		}
	}

#undef	RELA_HDR
#undef	RELA_CT
}

static void
dump_reloc(struct readelf *re)
{
	struct section *s;
	Elf_Data *d;
	int i, elferr;

	for (i = 0; (size_t)i < re->shnum; i++) {
		s = &re->sl[i];
		if (s->type == SHT_REL || s->type == SHT_RELA) {
			(void) elf_errno();
			if ((d = elf_getdata(s->scn, NULL)) == NULL) {
				elferr = elf_errno();
				if (elferr != 0)
					warnx("elf_getdata failed: %s",
					    elf_errmsg(elferr));
				continue;
			}
			if (s->type == SHT_REL)
				dump_rel(re, s, d);
			else
				dump_rela(re, s, d);
		}
	}
}

static void
dump_symtab(struct readelf *re, int i)
{
	struct section *s;
	Elf_Data *d;
	GElf_Sym sym;
	const char *name;
	uint32_t stab;
	int elferr, j, len;
	uint16_t vs;

	s = &re->sl[i];
	if (s->link >= re->shnum)
		return;
	stab = s->link;
	(void) elf_errno();
	if ((d = elf_getdata(s->scn, NULL)) == NULL) {
		elferr = elf_errno();
		if (elferr != 0)
			warnx("elf_getdata failed: %s", elf_errmsg(elferr));
		return;
	}
	if (d->d_size <= 0)
		return;
	if (!get_ent_count(s, &len))
		return;
	printf("\nSymbol table '%s' contains %d entries:\n", s->name, len);
	printf("%7s%9s%14s%5s%8s%6s%9s%5s\n", "Num:", "Value", "Size", "Type",
	    "Bind", "Vis", "Ndx", "Name");

	for (j = 0; j < len; j++) {
		if (gelf_getsym(d, j, &sym) != &sym) {
			warnx("gelf_getsym failed: %s", elf_errmsg(-1));
			continue;
		}
		printf("%6d:", j);
		printf(" %16.16jx", (uintmax_t) sym.st_value);
		printf(" %5ju", (uintmax_t) sym.st_size);
		printf(" %-7s", st_type(re->ehdr.e_machine,
		    re->ehdr.e_ident[EI_OSABI], GELF_ST_TYPE(sym.st_info)));
		printf(" %-6s", st_bind(GELF_ST_BIND(sym.st_info)));
		printf(" %-8s", st_vis(GELF_ST_VISIBILITY(sym.st_other)));
		printf(" %3s", st_shndx(sym.st_shndx));
		if ((name = elf_strptr(re->elf, stab, sym.st_name)) != NULL)
			printf(" %s", name);
		/* Append symbol version string for SHT_DYNSYM symbol table. */
		if (s->type == SHT_DYNSYM && re->ver != NULL &&
		    re->vs != NULL && re->vs[j] > 1) {
			vs = re->vs[j] & VERSYM_VERSION;
			if (vs >= re->ver_sz || re->ver[vs].name == NULL) {
				warnx("invalid versym version index %u", vs);
				break;
			}
			if (re->vs[j] & VERSYM_HIDDEN || re->ver[vs].type == 0)
				printf("@%s (%d)", re->ver[vs].name, vs);
			else
				printf("@@%s (%d)", re->ver[vs].name, vs);
		}
		putchar('\n');
	}

}

static void
dump_symtabs(struct readelf *re)
{
	GElf_Dyn dyn;
	Elf_Data *d;
	struct section *s;
	uint64_t dyn_off;
	int elferr, i, len;

	/*
	 * If -D is specified, only dump the symbol table specified by
	 * the DT_SYMTAB entry in the .dynamic section.
	 */
	dyn_off = 0;
	if (re->options & RE_DD) {
		s = NULL;
		for (i = 0; (size_t)i < re->shnum; i++)
			if (re->sl[i].type == SHT_DYNAMIC) {
				s = &re->sl[i];
				break;
			}
		if (s == NULL)
			return;
		(void) elf_errno();
		if ((d = elf_getdata(s->scn, NULL)) == NULL) {
			elferr = elf_errno();
			if (elferr != 0)
				warnx("elf_getdata failed: %s", elf_errmsg(-1));
			return;
		}
		if (d->d_size <= 0)
			return;
		if (!get_ent_count(s, &len))
			return;

		for (i = 0; i < len; i++) {
			if (gelf_getdyn(d, i, &dyn) != &dyn) {
				warnx("gelf_getdyn failed: %s", elf_errmsg(-1));
				continue;
			}
			if (dyn.d_tag == DT_SYMTAB) {
				dyn_off = dyn.d_un.d_val;
				break;
			}
		}
	}

	/* Find and dump symbol tables. */
	for (i = 0; (size_t)i < re->shnum; i++) {
		s = &re->sl[i];
		if (s->type == SHT_SYMTAB || s->type == SHT_DYNSYM) {
			if (re->options & RE_DD) {
				if (dyn_off == s->addr) {
					dump_symtab(re, i);
					break;
				}
			} else
				dump_symtab(re, i);
		}
	}
}

static void
dump_svr4_hash(struct section *s)
{
	Elf_Data	*d;
	uint32_t	*buf;
	uint32_t	 nbucket, nchain;
	uint32_t	*bucket, *chain;
	uint32_t	*bl, *c, maxl, total;
	int		 elferr, i, j;

	/* Read and parse the content of .hash section. */
	(void) elf_errno();
	if ((d = elf_getdata(s->scn, NULL)) == NULL) {
		elferr = elf_errno();
		if (elferr != 0)
			warnx("elf_getdata failed: %s", elf_errmsg(elferr));
		return;
	}
	if (d->d_size < 2 * sizeof(uint32_t)) {
		warnx(".hash section too small");
		return;
	}
	buf = d->d_buf;
	nbucket = buf[0];
	nchain = buf[1];
	if (nbucket <= 0 || nchain <= 0) {
		warnx("Malformed .hash section");
		return;
	}
	if (d->d_size != (nbucket + nchain + 2) * sizeof(uint32_t)) {
		warnx("Malformed .hash section");
		return;
	}
	bucket = &buf[2];
	chain = &buf[2 + nbucket];

	maxl = 0;
	if ((bl = calloc(nbucket, sizeof(*bl))) == NULL)
		errx(EXIT_FAILURE, "calloc failed");
	for (i = 0; (uint32_t)i < nbucket; i++)
		for (j = bucket[i]; j > 0 && (uint32_t)j < nchain; j = chain[j])
			if (++bl[i] > maxl)
				maxl = bl[i];
	if ((c = calloc(maxl + 1, sizeof(*c))) == NULL)
		errx(EXIT_FAILURE, "calloc failed");
	for (i = 0; (uint32_t)i < nbucket; i++)
		c[bl[i]]++;
	printf("\nHistogram for bucket list length (total of %u buckets):\n",
	    nbucket);
	printf(" Length\tNumber\t\t%% of total\tCoverage\n");
	total = 0;
	for (i = 0; (uint32_t)i <= maxl; i++) {
		total += c[i] * i;
		printf("%7u\t%-10u\t(%5.1f%%)\t%5.1f%%\n", i, c[i],
		    c[i] * 100.0 / nbucket, total * 100.0 / (nchain - 1));
	}
	free(c);
	free(bl);
}

static void
dump_svr4_hash64(struct readelf *re, struct section *s)
{
	Elf_Data	*d, dst;
	uint64_t	*buf;
	uint64_t	 nbucket, nchain;
	uint64_t	*bucket, *chain;
	uint64_t	*bl, *c, maxl, total;
	int		 elferr, i, j;

	/*
	 * ALPHA uses 64-bit hash entries. Since libelf assumes that
	 * .hash section contains only 32-bit entry, an explicit
	 * gelf_xlatetom is needed here.
	 */
	(void) elf_errno();
	if ((d = elf_rawdata(s->scn, NULL)) == NULL) {
		elferr = elf_errno();
		if (elferr != 0)
			warnx("elf_rawdata failed: %s",
			    elf_errmsg(elferr));
		return;
	}
	d->d_type = ELF_T_XWORD;
	memcpy(&dst, d, sizeof(Elf_Data));
	if (gelf_xlatetom(re->elf, &dst, d,
		re->ehdr.e_ident[EI_DATA]) != &dst) {
		warnx("gelf_xlatetom failed: %s", elf_errmsg(-1));
		return;
	}
	if (dst.d_size < 2 * sizeof(uint64_t)) {
		warnx(".hash section too small");
		return;
	}
	buf = dst.d_buf;
	nbucket = buf[0];
	nchain = buf[1];
	if (nbucket <= 0 || nchain <= 0) {
		warnx("Malformed .hash section");
		return;
	}
	if (d->d_size != (nbucket + nchain + 2) * sizeof(uint32_t)) {
		warnx("Malformed .hash section");
		return;
	}
	bucket = &buf[2];
	chain = &buf[2 + nbucket];

	maxl = 0;
	if ((bl = calloc(nbucket, sizeof(*bl))) == NULL)
		errx(EXIT_FAILURE, "calloc failed");
	for (i = 0; (uint32_t)i < nbucket; i++)
		for (j = bucket[i]; j > 0 && (uint32_t)j < nchain; j = chain[j])
			if (++bl[i] > maxl)
				maxl = bl[i];
	if ((c = calloc(maxl + 1, sizeof(*c))) == NULL)
		errx(EXIT_FAILURE, "calloc failed");
	for (i = 0; (uint64_t)i < nbucket; i++)
		c[bl[i]]++;
	printf("Histogram for bucket list length (total of %ju buckets):\n",
	    (uintmax_t)nbucket);
	printf(" Length\tNumber\t\t%% of total\tCoverage\n");
	total = 0;
	for (i = 0; (uint64_t)i <= maxl; i++) {
		total += c[i] * i;
		printf("%7u\t%-10ju\t(%5.1f%%)\t%5.1f%%\n", i, (uintmax_t)c[i],
		    c[i] * 100.0 / nbucket, total * 100.0 / (nchain - 1));
	}
	free(c);
	free(bl);
}

static void
dump_gnu_hash(struct readelf *re, struct section *s)
{
	struct section	*ds;
	Elf_Data	*d;
	uint32_t	*buf;
	uint32_t	*bucket, *chain;
	uint32_t	 nbucket, nchain, symndx, maskwords;
	uint32_t	*bl, *c, maxl, total;
	int		 elferr, dynsymcount, i, j;

	(void) elf_errno();
	if ((d = elf_getdata(s->scn, NULL)) == NULL) {
		elferr = elf_errno();
		if (elferr != 0)
			warnx("elf_getdata failed: %s",
			    elf_errmsg(elferr));
		return;
	}
	if (d->d_size < 4 * sizeof(uint32_t)) {
		warnx(".gnu.hash section too small");
		return;
	}
	buf = d->d_buf;
	nbucket = buf[0];
	symndx = buf[1];
	maskwords = buf[2];
	buf += 4;
	if (s->link >= re->shnum)
		return;
	ds = &re->sl[s->link];
	if (!get_ent_count(ds, &dynsymcount))
		return;
	if (symndx >= (uint32_t)dynsymcount) {
		warnx("Malformed .gnu.hash section (symndx out of range)");
		return;
	}
	nchain = dynsymcount - symndx;
	if (d->d_size != 4 * sizeof(uint32_t) + maskwords *
	    (re->ec == ELFCLASS32 ? sizeof(uint32_t) : sizeof(uint64_t)) +
	    (nbucket + nchain) * sizeof(uint32_t)) {
		warnx("Malformed .gnu.hash section");
		return;
	}
	bucket = buf + (re->ec == ELFCLASS32 ? maskwords : maskwords * 2);
	chain = bucket + nbucket;

	maxl = 0;
	if ((bl = calloc(nbucket, sizeof(*bl))) == NULL)
		errx(EXIT_FAILURE, "calloc failed");
	for (i = 0; (uint32_t)i < nbucket; i++)
		for (j = bucket[i]; j > 0 && (uint32_t)j - symndx < nchain;
		     j++) {
			if (++bl[i] > maxl)
				maxl = bl[i];
			if (chain[j - symndx] & 1)
				break;
		}
	if ((c = calloc(maxl + 1, sizeof(*c))) == NULL)
		errx(EXIT_FAILURE, "calloc failed");
	for (i = 0; (uint32_t)i < nbucket; i++)
		c[bl[i]]++;
	printf("Histogram for bucket list length (total of %u buckets):\n",
	    nbucket);
	printf(" Length\tNumber\t\t%% of total\tCoverage\n");
	total = 0;
	for (i = 0; (uint32_t)i <= maxl; i++) {
		total += c[i] * i;
		printf("%7u\t%-10u\t(%5.1f%%)\t%5.1f%%\n", i, c[i],
		    c[i] * 100.0 / nbucket, total * 100.0 / (nchain - 1));
	}
	free(c);
	free(bl);
}

static struct flag_desc gnu_property_aarch64_feature_1_and_bits[] = {
	{ GNU_PROPERTY_AARCH64_FEATURE_1_BTI,	"BTI" },
	{ GNU_PROPERTY_AARCH64_FEATURE_1_PAC,	"PAC" },
	{ 0, NULL }
};

static struct flag_desc_list gnu_property_aarch64[] = {
	{
	    GNU_PROPERTY_AARCH64_FEATURE_1_AND,
	    "AArch64 features",
	    gnu_property_aarch64_feature_1_and_bits
	},
	{ 0, NULL, NULL }
};

static struct flag_desc gnu_property_x86_feature_1_and_bits[] = {
	{ GNU_PROPERTY_X86_FEATURE_1_IBT,	"IBT" },
	{ GNU_PROPERTY_X86_FEATURE_1_SHSTK,	"SHSTK" },
	{ 0, NULL }
};

static struct flag_desc_list gnu_property_x86[] = {
	{
	    GNU_PROPERTY_X86_FEATURE_1_AND,
	    "x64 features",
	    gnu_property_x86_feature_1_and_bits
	},
	{ 0, NULL, NULL }
};

static struct {
	unsigned int emachine;
	struct flag_desc_list *flag_list;
} gnu_property_archs[] = {
	{ EM_AARCH64, gnu_property_aarch64 },
	{ EM_X86_64, gnu_property_x86 },
	{ 0, NULL }
};

static void
dump_gnu_property_type_0(struct readelf *re, const char *buf, size_t sz)
{
	struct flag_desc_list *desc_list;
	struct flag_desc *desc;
	size_t i;
	uint32_t type, prop_sz;

	printf("      Properties: ");
	while (sz > 0) {
		if (sz < 8)
			goto bad;

		type = *(const uint32_t *)(const void *)buf;
		prop_sz = *(const uint32_t *)(const void *)(buf + 4);
		buf += 8;
		sz -= 8;

		if (prop_sz > sz)
			goto bad;

		if (type >= GNU_PROPERTY_LOPROC &&
		    type <= GNU_PROPERTY_HIPROC) {
			desc_list = NULL;
			for (i = 0; gnu_property_archs[i].flag_list != NULL;
			    i++) {
				if (gnu_property_archs[i].emachine ==
				    re->ehdr.e_machine) {
					desc_list =
					    gnu_property_archs[i].flag_list;
					break;
				}
			}
			if (desc_list == NULL) {
				printf("machine type %x unknown\n",
				    re->ehdr.e_machine);
				goto unknown;
			}

			desc = NULL;
			for (i = 0; desc_list[i].desc != NULL; i++) {
				if (desc_list[i].type == type) {
					desc = desc_list[i].desc;
					break;
				}
			}
			if (desc != NULL) {
				printf("%s:", desc_list[i].desc_str);
				if (prop_sz != 4)
					goto bad;
				dump_flags(desc,
				    *(const uint32_t *)(const void *)buf);
			}
		}

		buf += roundup2(prop_sz, 8);
		sz -= roundup2(prop_sz, 8);
	}
	return;
bad:
	printf("corrupt GNU property\n");
unknown:
	printf("remaining description data:");
	for (i = 0; i < sz; i++)
		printf(" %02x", (unsigned char)buf[i]);
	printf("\n");
}

static void
dump_hash(struct readelf *re)
{
	struct section	*s;
	int		 i;

	for (i = 0; (size_t) i < re->shnum; i++) {
		s = &re->sl[i];
		if (s->type == SHT_HASH || s->type == SHT_GNU_HASH) {
			if (s->type == SHT_GNU_HASH)
				dump_gnu_hash(re, s);
			else if (re->ehdr.e_machine == EM_ALPHA &&
			    s->entsize == 8)
				dump_svr4_hash64(re, s);
			else
				dump_svr4_hash(s);
		}
	}
}

static void
dump_notes(struct readelf *re)
{
	struct section *s;
	const char *rawfile;
	GElf_Phdr phdr;
	Elf_Data *d;
	size_t filesize, phnum;
	int i, elferr;

	if (re->ehdr.e_type == ET_CORE) {
		/*
		 * Search program headers in the core file for
		 * PT_NOTE entry.
		 */
		if (elf_getphnum(re->elf, &phnum) == 0) {
			warnx("elf_getphnum failed: %s", elf_errmsg(-1));
			return;
		}
		if (phnum == 0)
			return;
		if ((rawfile = elf_rawfile(re->elf, &filesize)) == NULL) {
			warnx("elf_rawfile failed: %s", elf_errmsg(-1));
			return;
		}
		for (i = 0; (size_t) i < phnum; i++) {
			if (gelf_getphdr(re->elf, i, &phdr) != &phdr) {
				warnx("gelf_getphdr failed: %s",
				    elf_errmsg(-1));
				continue;
			}
			if (phdr.p_type == PT_NOTE) {
				if (phdr.p_offset >= filesize ||
				    phdr.p_filesz > filesize - phdr.p_offset) {
					warnx("invalid PHDR offset");
					continue;
				}
				dump_notes_content(re, rawfile + phdr.p_offset,
				    phdr.p_filesz, phdr.p_offset);
			}
		}

	} else {
		/*
		 * For objects other than core files, Search for
		 * SHT_NOTE sections.
		 */
		for (i = 0; (size_t) i < re->shnum; i++) {
			s = &re->sl[i];
			if (s->type == SHT_NOTE) {
				(void) elf_errno();
				if ((d = elf_getdata(s->scn, NULL)) == NULL) {
					elferr = elf_errno();
					if (elferr != 0)
						warnx("elf_getdata failed: %s",
						    elf_errmsg(elferr));
					continue;
				}
				dump_notes_content(re, d->d_buf, d->d_size,
				    s->off);
			}
		}
	}
}

static struct flag_desc note_feature_ctl_flags[] = {
	{ NT_FREEBSD_FCTL_ASLR_DISABLE,		"ASLR_DISABLE" },
	{ NT_FREEBSD_FCTL_PROTMAX_DISABLE,	"PROTMAX_DISABLE" },
	{ NT_FREEBSD_FCTL_STKGAP_DISABLE,	"STKGAP_DISABLE" },
	{ NT_FREEBSD_FCTL_WXNEEDED,		"WXNEEDED" },
	{ NT_FREEBSD_FCTL_LA48,			"LA48" },
	{ 0, NULL }
};

static bool
dump_note_string(const char *description, const char *s, size_t len)
{
	size_t i;

	if (len == 0 || s[--len] != '\0') {
		return (false);
	} else {
		for (i = 0; i < len; i++)
			if (!isprint(s[i]))
				return (false);
	}

	printf("   %s: %s\n", description, s);
	return (true);
}

struct note_desc {
	uint32_t type;
	const char *description;
	bool (*fp)(const char *, const char *, size_t);
};

static struct note_desc xen_notes[] = {
	{ 5, "Xen version", dump_note_string },
	{ 6, "Guest OS", dump_note_string },
	{ 7, "Guest version", dump_note_string },
	{ 8, "Loader", dump_note_string },
	{ 9, "PAE mode", dump_note_string },
	{ 10, "Features", dump_note_string },
	{ 11, "BSD symtab", dump_note_string },
	{ 0, NULL, NULL }
};

static void
dump_notes_data(struct readelf *re, const char *name, uint32_t type,
    const char *buf, size_t sz)
{
	struct note_desc *nd;
	size_t i;
	const uint32_t *ubuf;

	/* Note data is at least 4-byte aligned. */
	if (((uintptr_t)buf & 3) != 0) {
		warnx("bad note data alignment");
		goto unknown;
	}
	ubuf = (const uint32_t *)(const void *)buf;

	if (strcmp(name, "FreeBSD") == 0) {
		switch (type) {
		case NT_FREEBSD_ABI_TAG:
			if (sz != 4)
				goto unknown;
			printf("   ABI tag: %u\n", ubuf[0]);
			return;
		/* NT_FREEBSD_NOINIT_TAG carries no data, treat as unknown. */
		case NT_FREEBSD_ARCH_TAG:
			printf("   Arch tag: %s\n", buf);
			return;
		case NT_FREEBSD_FEATURE_CTL:
			if (sz != 4)
				goto unknown;
			printf("   Features:");
			dump_flags(note_feature_ctl_flags, ubuf[0]);
			return;
		}
	} else if (strcmp(name, "Go") == 0) {
		if (type == 4) {
			printf("   Build ID: ");
			for (i = 0; i < sz; i++) {
				printf(isprint(buf[i]) ? "%c" : "<%02x>",
				    buf[i]);
			}
			printf("\n");
			return;
		}
	} else if (strcmp(name, "GNU") == 0) {
		switch (type) {
		case NT_GNU_PROPERTY_TYPE_0:
			dump_gnu_property_type_0(re, buf, sz);
			return;
		case NT_GNU_BUILD_ID:
			printf("   Build ID: ");
			for (i = 0; i < sz; i++)
				printf("%02x", (unsigned char)buf[i]);
			printf("\n");
			return;
		}
	} else if (strcmp(name, "Xen") == 0) {
		for (nd = xen_notes; nd->description != NULL; nd++) {
			if (nd->type == type) {
				if (nd->fp(nd->description, buf, sz))
					return;
				else
					break;
			}
		}
	}
unknown:
	printf("   description data:");
	for (i = 0; i < sz; i++)
		printf(" %02x", (unsigned char)buf[i]);
	printf("\n");
}

static void
dump_notes_content(struct readelf *re, const char *buf, size_t sz, off_t off)
{
	Elf_Note *note;
	const char *end, *name;
	uint32_t namesz, descsz;

	printf("\nNotes at offset %#010jx with length %#010jx:\n",
	    (uintmax_t) off, (uintmax_t) sz);
	printf("  %-13s %-15s %s\n", "Owner", "Data size", "Description");
	end = buf + sz;
	while (buf < end) {
		if (buf + sizeof(*note) > end) {
			warnx("invalid note header");
			return;
		}
		note = (Elf_Note *)(uintptr_t) buf;
		namesz = roundup2(note->n_namesz, 4);
		descsz = roundup2(note->n_descsz, 4);
		if (namesz < note->n_namesz || descsz < note->n_descsz ||
		    buf + namesz + descsz > end) {
			warnx("invalid note header");
			return;
		}
		buf += sizeof(Elf_Note);
		name = buf;
		buf += namesz;
		/*
		 * The name field is required to be nul-terminated, and
		 * n_namesz includes the terminating nul in observed
		 * implementations (contrary to the ELF-64 spec). A special
		 * case is needed for cores generated by some older Linux
		 * versions, which write a note named "CORE" without a nul
		 * terminator and n_namesz = 4.
		 */
		if (note->n_namesz == 0)
			name = "";
		else if (note->n_namesz == 4 && strncmp(name, "CORE", 4) == 0)
			name = "CORE";
		else if (strnlen(name, note->n_namesz) >= note->n_namesz)
			name = "<invalid>";
		printf("  %-13s %#010jx", name, (uintmax_t) note->n_descsz);
		printf("      %s\n", note_type(name, re->ehdr.e_type,
		    note->n_type));
		dump_notes_data(re, name, note->n_type, buf, note->n_descsz);
		buf += descsz;
	}
}

/*
 * Symbol versioning sections are the same for 32bit and 64bit
 * ELF objects.
 */
#define Elf_Verdef	Elf32_Verdef
#define	Elf_Verdaux	Elf32_Verdaux
#define	Elf_Verneed	Elf32_Verneed
#define	Elf_Vernaux	Elf32_Vernaux

#define	SAVE_VERSION_NAME(x, n, t)					\
	do {								\
		while (x >= re->ver_sz) {				\
			nv = realloc(re->ver,				\
			    sizeof(*re->ver) * re->ver_sz * 2);		\
			if (nv == NULL) {				\
				warn("realloc failed");			\
				free(re->ver);				\
				return;					\
			}						\
			re->ver = nv;					\
			for (i = re->ver_sz; i < re->ver_sz * 2; i++) {	\
				re->ver[i].name = NULL;			\
				re->ver[i].type = 0;			\
			}						\
			re->ver_sz *= 2;				\
		}							\
		if (x > 1) {						\
			re->ver[x].name = n;				\
			re->ver[x].type = t;				\
		}							\
	} while (0)


static void
dump_verdef(struct readelf *re, int dump)
{
	struct section *s;
	struct symver *nv;
	Elf_Data *d;
	Elf_Verdef *vd;
	Elf_Verdaux *vda;
	uint8_t *buf, *end, *buf2;
	const char *name;
	int elferr, i, j;

	if ((s = re->vd_s) == NULL)
		return;
	if (s->link >= re->shnum)
		return;

	if (re->ver == NULL) {
		re->ver_sz = 16;
		if ((re->ver = calloc(re->ver_sz, sizeof(*re->ver))) ==
		    NULL) {
			warn("calloc failed");
			return;
		}
		re->ver[0].name = "*local*";
		re->ver[1].name = "*global*";
	}

	if (dump)
		printf("\nVersion definition section (%s):\n", s->name);
	(void) elf_errno();
	if ((d = elf_getdata(s->scn, NULL)) == NULL) {
		elferr = elf_errno();
		if (elferr != 0)
			warnx("elf_getdata failed: %s", elf_errmsg(elferr));
		return;
	}
	if (d->d_size == 0)
		return;

	buf = d->d_buf;
	end = buf + d->d_size;
	while (buf + sizeof(Elf_Verdef) <= end) {
		vd = (Elf_Verdef *) (uintptr_t) buf;
		if (dump) {
			printf("  0x%4.4lx", (unsigned long)
			    (buf - (uint8_t *)d->d_buf));
			printf(" vd_version: %u vd_flags: %d"
			    " vd_ndx: %u vd_cnt: %u", vd->vd_version,
			    vd->vd_flags, vd->vd_ndx, vd->vd_cnt);
		}
		buf2 = buf + vd->vd_aux;
		j = 0;
		while (buf2 + sizeof(Elf_Verdaux) <= end && j < vd->vd_cnt) {
			vda = (Elf_Verdaux *) (uintptr_t) buf2;
			name = get_string(re, s->link, vda->vda_name);
			if (j == 0) {
				if (dump)
					printf(" vda_name: %s\n", name);
				SAVE_VERSION_NAME((int)vd->vd_ndx, name, 1);
			} else if (dump)
				printf("  0x%4.4lx parent: %s\n",
				    (unsigned long) (buf2 -
				    (uint8_t *)d->d_buf), name);
			if (vda->vda_next == 0)
				break;
			buf2 += vda->vda_next;
			j++;
		}
		if (vd->vd_next == 0)
			break;
		buf += vd->vd_next;
	}
}

static void
dump_verneed(struct readelf *re, int dump)
{
	struct section *s;
	struct symver *nv;
	Elf_Data *d;
	Elf_Verneed *vn;
	Elf_Vernaux *vna;
	uint8_t *buf, *end, *buf2;
	const char *name;
	int elferr, i, j;

	if ((s = re->vn_s) == NULL)
		return;
	if (s->link >= re->shnum)
		return;

	if (re->ver == NULL) {
		re->ver_sz = 16;
		if ((re->ver = calloc(re->ver_sz, sizeof(*re->ver))) ==
		    NULL) {
			warn("calloc failed");
			return;
		}
		re->ver[0].name = "*local*";
		re->ver[1].name = "*global*";
	}

	if (dump)
		printf("\nVersion needed section (%s):\n", s->name);
	(void) elf_errno();
	if ((d = elf_getdata(s->scn, NULL)) == NULL) {
		elferr = elf_errno();
		if (elferr != 0)
			warnx("elf_getdata failed: %s", elf_errmsg(elferr));
		return;
	}
	if (d->d_size == 0)
		return;

	buf = d->d_buf;
	end = buf + d->d_size;
	while (buf + sizeof(Elf_Verneed) <= end) {
		vn = (Elf_Verneed *) (uintptr_t) buf;
		if (dump) {
			printf("  0x%4.4lx", (unsigned long)
			    (buf - (uint8_t *)d->d_buf));
			printf(" vn_version: %u vn_file: %s vn_cnt: %u\n",
			    vn->vn_version,
			    get_string(re, s->link, vn->vn_file),
			    vn->vn_cnt);
		}
		buf2 = buf + vn->vn_aux;
		j = 0;
		while (buf2 + sizeof(Elf_Vernaux) <= end && j < vn->vn_cnt) {
			vna = (Elf32_Vernaux *) (uintptr_t) buf2;
			if (dump)
				printf("  0x%4.4lx", (unsigned long)
				    (buf2 - (uint8_t *)d->d_buf));
			name = get_string(re, s->link, vna->vna_name);
			if (dump)
				printf("   vna_name: %s vna_flags: %u"
				    " vna_other: %u\n", name,
				    vna->vna_flags, vna->vna_other);
			SAVE_VERSION_NAME((int)vna->vna_other, name, 0);
			if (vna->vna_next == 0)
				break;
			buf2 += vna->vna_next;
			j++;
		}
		if (vn->vn_next == 0)
			break;
		buf += vn->vn_next;
	}
}

static void
dump_versym(struct readelf *re)
{
	int i;
	uint16_t vs;

	if (re->vs_s == NULL || re->ver == NULL || re->vs == NULL)
		return;
	printf("\nVersion symbol section (%s):\n", re->vs_s->name);
	for (i = 0; i < re->vs_sz; i++) {
		if ((i & 3) == 0) {
			if (i > 0)
				putchar('\n');
			printf("  %03x:", i);
		}
		vs = re->vs[i] & VERSYM_VERSION;
		if (vs >= re->ver_sz || re->ver[vs].name == NULL) {
			warnx("invalid versym version index %u", re->vs[i]);
			break;
		}
		if (re->vs[i] & VERSYM_HIDDEN)
			printf(" %3xh %-12s ", vs,
			    re->ver[re->vs[i] & VERSYM_VERSION].name);
		else
			printf(" %3x %-12s ", vs, re->ver[re->vs[i]].name);
	}
	putchar('\n');
}

static void
dump_ver(struct readelf *re)
{

	if (re->vs_s && re->ver && re->vs)
		dump_versym(re);
	if (re->vd_s)
		dump_verdef(re, 1);
	if (re->vn_s)
		dump_verneed(re, 1);
}

static void
search_ver(struct readelf *re)
{
	struct section *s;
	Elf_Data *d;
	int elferr, i;

	for (i = 0; (size_t) i < re->shnum; i++) {
		s = &re->sl[i];
		if (s->type == SHT_SUNW_versym)
			re->vs_s = s;
		if (s->type == SHT_SUNW_verneed)
			re->vn_s = s;
		if (s->type == SHT_SUNW_verdef)
			re->vd_s = s;
	}
	if (re->vd_s)
		dump_verdef(re, 0);
	if (re->vn_s)
		dump_verneed(re, 0);
	if (re->vs_s && re->ver != NULL) {
		(void) elf_errno();
		if ((d = elf_getdata(re->vs_s->scn, NULL)) == NULL) {
			elferr = elf_errno();
			if (elferr != 0)
				warnx("elf_getdata failed: %s",
				    elf_errmsg(elferr));
			return;
		}
		if (d->d_size == 0)
			return;
		re->vs = d->d_buf;
		re->vs_sz = d->d_size / sizeof(Elf32_Half);
	}
}

#undef	Elf_Verdef
#undef	Elf_Verdaux
#undef	Elf_Verneed
#undef	Elf_Vernaux
#undef	SAVE_VERSION_NAME

/*
 * Elf32_Lib and Elf64_Lib are identical.
 */
#define	Elf_Lib		Elf32_Lib

static void
dump_liblist(struct readelf *re)
{
	struct section *s;
	struct tm *t;
	time_t ti;
	char tbuf[20];
	Elf_Data *d;
	Elf_Lib *lib;
	int i, j, k, elferr, first, len;

	for (i = 0; (size_t) i < re->shnum; i++) {
		s = &re->sl[i];
		if (s->type != SHT_GNU_LIBLIST)
			continue;
		if (s->link >= re->shnum)
			continue;
		(void) elf_errno();
		if ((d = elf_getdata(s->scn, NULL)) == NULL) {
			elferr = elf_errno();
			if (elferr != 0)
				warnx("elf_getdata failed: %s",
				    elf_errmsg(elferr));
			continue;
		}
		if (d->d_size <= 0)
			continue;
		lib = d->d_buf;
		if (!get_ent_count(s, &len))
			continue;
		printf("\nLibrary list section '%s' ", s->name);
		printf("contains %d entries:\n", len);
		printf("%12s%24s%18s%10s%6s\n", "Library", "Time Stamp",
		    "Checksum", "Version", "Flags");
		for (j = 0; (uint64_t) j < s->sz / s->entsize; j++) {
			printf("%3d: ", j);
			printf("%-20.20s ",
			    get_string(re, s->link, lib->l_name));
			ti = lib->l_time_stamp;
			t = gmtime(&ti);
			snprintf(tbuf, sizeof(tbuf), "%04d-%02d-%02dT%02d:%02d"
			    ":%2d", t->tm_year + 1900, t->tm_mon + 1,
			    t->tm_mday, t->tm_hour, t->tm_min, t->tm_sec);
			printf("%-19.19s ", tbuf);
			printf("0x%08x ", lib->l_checksum);
			printf("%-7d %#x", lib->l_version, lib->l_flags);
			if (lib->l_flags != 0) {
				first = 1;
				putchar('(');
				for (k = 0; l_flag[k].name != NULL; k++) {
					if ((l_flag[k].value & lib->l_flags) ==
					    0)
						continue;
					if (!first)
						putchar(',');
					else
						first = 0;
					printf("%s", l_flag[k].name);
				}
				putchar(')');
			}
			putchar('\n');
			lib++;
		}
	}
}

#undef Elf_Lib

static void
dump_section_groups(struct readelf *re)
{
	struct section *s;
	const char *symname;
	Elf_Data *d;
	uint32_t *w;
	int i, j, elferr;
	size_t n;

	for (i = 0; (size_t) i < re->shnum; i++) {
		s = &re->sl[i];
		if (s->type != SHT_GROUP)
			continue;
		if (s->link >= re->shnum)
			continue;
		(void) elf_errno();
		if ((d = elf_getdata(s->scn, NULL)) == NULL) {
			elferr = elf_errno();
			if (elferr != 0)
				warnx("elf_getdata failed: %s",
				    elf_errmsg(elferr));
			continue;
		}
		if (d->d_size <= 0)
			continue;

		w = d->d_buf;

		/* We only support COMDAT section. */
#ifndef GRP_COMDAT
#define	GRP_COMDAT 0x1
#endif
		if ((*w++ & GRP_COMDAT) == 0)
			return;

		if (s->entsize == 0)
			s->entsize = 4;

		symname = get_symbol_name(re, s->link, s->info);
		n = s->sz / s->entsize;
		if (n-- < 1)
			return;

		printf("\nCOMDAT group section [%5d] `%s' [%s] contains %ju"
		    " sections:\n", i, s->name, symname, (uintmax_t)n);
		printf("   %-10.10s %s\n", "[Index]", "Name");
		for (j = 0; (size_t) j < n; j++, w++) {
			if (*w >= re->shnum) {
				warnx("invalid section index: %u", *w);
				continue;
			}
			printf("   [%5u]   %s\n", *w, re->sl[*w].name);
		}
	}
}

static uint8_t *
dump_unknown_tag(uint64_t tag, uint8_t *p, uint8_t *pe)
{
	uint64_t val;

	/*
	 * According to ARM EABI: For tags > 32, even numbered tags have
	 * a ULEB128 param and odd numbered ones have NUL-terminated
	 * string param. This rule probably also applies for tags <= 32
	 * if the object arch is not ARM.
	 */

	printf("  Tag_unknown_%ju: ", (uintmax_t) tag);

	if (tag & 1) {
		printf("%s\n", (char *) p);
		p += strlen((char *) p) + 1;
	} else {
		val = _decode_uleb128(&p, pe);
		printf("%ju\n", (uintmax_t) val);
	}

	return (p);
}

static uint8_t *
dump_compatibility_tag(uint8_t *p, uint8_t *pe)
{
	uint64_t val;

	val = _decode_uleb128(&p, pe);
	printf("flag = %ju, vendor = %s\n", (uintmax_t) val, p);
	p += strlen((char *) p) + 1;

	return (p);
}

static void
dump_arm_attributes(struct readelf *re, uint8_t *p, uint8_t *pe)
{
	uint64_t tag, val;
	size_t i;
	int found, desc;

	(void) re;

	while (p < pe) {
		tag = _decode_uleb128(&p, pe);
		found = desc = 0;
		for (i = 0; i < sizeof(aeabi_tags) / sizeof(aeabi_tags[0]);
		     i++) {
			if (tag == aeabi_tags[i].tag) {
				found = 1;
				printf("  %s: ", aeabi_tags[i].s_tag);
				if (aeabi_tags[i].get_desc) {
					desc = 1;
					val = _decode_uleb128(&p, pe);
					printf("%s\n",
					    aeabi_tags[i].get_desc(val));
				}
				break;
			}
			if (tag < aeabi_tags[i].tag)
				break;
		}
		if (!found) {
			p = dump_unknown_tag(tag, p, pe);
			continue;
		}
		if (desc)
			continue;

		switch (tag) {
		case 4:		/* Tag_CPU_raw_name */
		case 5:		/* Tag_CPU_name */
		case 67:	/* Tag_conformance */
			printf("%s\n", (char *) p);
			p += strlen((char *) p) + 1;
			break;
		case 32:	/* Tag_compatibility */
			p = dump_compatibility_tag(p, pe);
			break;
		case 64:	/* Tag_nodefaults */
			/* ignored, written as 0. */
			(void) _decode_uleb128(&p, pe);
			printf("True\n");
			break;
		case 65:	/* Tag_also_compatible_with */
			val = _decode_uleb128(&p, pe);
			/* Must be Tag_CPU_arch */
			if (val != 6) {
				printf("unknown\n");
				break;
			}
			val = _decode_uleb128(&p, pe);
			printf("%s\n", aeabi_cpu_arch(val));
			/* Skip NUL terminator. */
			p++;
			break;
		default:
			putchar('\n');
			break;
		}
	}
}

#ifndef	Tag_GNU_MIPS_ABI_FP
#define	Tag_GNU_MIPS_ABI_FP	4
#endif

static void
dump_mips_attributes(struct readelf *re, uint8_t *p, uint8_t *pe)
{
	uint64_t tag, val;

	(void) re;

	while (p < pe) {
		tag = _decode_uleb128(&p, pe);
		switch (tag) {
		case Tag_GNU_MIPS_ABI_FP:
			val = _decode_uleb128(&p, pe);
			printf("  Tag_GNU_MIPS_ABI_FP: %s\n", mips_abi_fp(val));
			break;
		case 32:	/* Tag_compatibility */
			p = dump_compatibility_tag(p, pe);
			break;
		default:
			p = dump_unknown_tag(tag, p, pe);
			break;
		}
	}
}

#ifndef Tag_GNU_Power_ABI_FP
#define	Tag_GNU_Power_ABI_FP	4
#endif

#ifndef Tag_GNU_Power_ABI_Vector
#define	Tag_GNU_Power_ABI_Vector	8
#endif

static void
dump_ppc_attributes(uint8_t *p, uint8_t *pe)
{
	uint64_t tag, val;

	while (p < pe) {
		tag = _decode_uleb128(&p, pe);
		switch (tag) {
		case Tag_GNU_Power_ABI_FP:
			val = _decode_uleb128(&p, pe);
			printf("  Tag_GNU_Power_ABI_FP: %s\n", ppc_abi_fp(val));
			break;
		case Tag_GNU_Power_ABI_Vector:
			val = _decode_uleb128(&p, pe);
			printf("  Tag_GNU_Power_ABI_Vector: %s\n",
			    ppc_abi_vector(val));
			break;
		case 32:	/* Tag_compatibility */
			p = dump_compatibility_tag(p, pe);
			break;
		default:
			p = dump_unknown_tag(tag, p, pe);
			break;
		}
	}
}

static void
dump_attributes(struct readelf *re)
{
	struct section *s;
	Elf_Data *d;
	uint8_t *p, *pe, *sp;
	size_t len, seclen, nlen, sublen;
	uint64_t val;
	int tag, i, elferr;

	for (i = 0; (size_t) i < re->shnum; i++) {
		s = &re->sl[i];
		if (s->type != SHT_GNU_ATTRIBUTES &&
		    (re->ehdr.e_machine != EM_ARM || s->type != SHT_LOPROC + 3))
			continue;
		(void) elf_errno();
		if ((d = elf_rawdata(s->scn, NULL)) == NULL) {
			elferr = elf_errno();
			if (elferr != 0)
				warnx("elf_rawdata failed: %s",
				    elf_errmsg(elferr));
			continue;
		}
		if (d->d_size <= 0)
			continue;
		p = d->d_buf;
		pe = p + d->d_size;
		if (*p != 'A') {
			printf("Unknown Attribute Section Format: %c\n",
			    (char) *p);
			continue;
		}
		len = d->d_size - 1;
		p++;
		while (len > 0) {
			if (len < 4) {
				warnx("truncated attribute section length");
				return;
			}
			seclen = re->dw_decode(&p, 4);
			if (seclen > len) {
				warnx("invalid attribute section length");
				return;
			}
			len -= seclen;
			nlen = strlen((char *) p) + 1;
			if (nlen + 4 > seclen) {
				warnx("invalid attribute section name");
				return;
			}
			printf("Attribute Section: %s\n", (char *) p);
			p += nlen;
			seclen -= nlen + 4;
			while (seclen > 0) {
				sp = p;
				tag = *p++;
				sublen = re->dw_decode(&p, 4);
				if (sublen > seclen) {
					warnx("invalid attribute sub-section"
					    " length");
					return;
				}
				seclen -= sublen;
				printf("%s", top_tag(tag));
				if (tag == 2 || tag == 3) {
					putchar(':');
					for (;;) {
						val = _decode_uleb128(&p, pe);
						if (val == 0)
							break;
						printf(" %ju", (uintmax_t) val);
					}
				}
				putchar('\n');
				if (re->ehdr.e_machine == EM_ARM &&
				    s->type == SHT_LOPROC + 3)
					dump_arm_attributes(re, p, sp + sublen);
				else if (re->ehdr.e_machine == EM_MIPS ||
				    re->ehdr.e_machine == EM_MIPS_RS3_LE)
					dump_mips_attributes(re, p,
					    sp + sublen);
				else if (re->ehdr.e_machine == EM_PPC)
					dump_ppc_attributes(p, sp + sublen);
				p = sp + sublen;
			}
		}
	}
}

static void
dump_mips_specific_info(struct readelf *re)
{
	struct section *s;
	int i;

	s = NULL;
	for (i = 0; (size_t) i < re->shnum; i++) {
		s = &re->sl[i];
		if (s->name != NULL && (!strcmp(s->name, ".MIPS.options") ||
		    (s->type == SHT_MIPS_OPTIONS))) {
			dump_mips_options(re, s);
		}
	}

	if (s->name != NULL && (!strcmp(s->name, ".MIPS.abiflags") ||
	    (s->type == SHT_MIPS_ABIFLAGS)))
		dump_mips_abiflags(re, s);

	/*
	 * Dump .reginfo if present (although it will be ignored by an OS if a
	 * .MIPS.options section is present, according to SGI mips64 spec).
	 */
	for (i = 0; (size_t) i < re->shnum; i++) {
		s = &re->sl[i];
		if (s->name != NULL && (!strcmp(s->name, ".reginfo") ||
		    (s->type == SHT_MIPS_REGINFO)))
			dump_mips_reginfo(re, s);
	}
}

static void
dump_mips_abiflags(struct readelf *re, struct section *s)
{
	Elf_Data *d;
	uint8_t *p;
	int elferr;
	uint32_t isa_ext, ases, flags1, flags2;
	uint16_t version;
	uint8_t isa_level, isa_rev, gpr_size, cpr1_size, cpr2_size, fp_abi;

	if ((d = elf_rawdata(s->scn, NULL)) == NULL) {
		elferr = elf_errno();
		if (elferr != 0)
			warnx("elf_rawdata failed: %s",
			    elf_errmsg(elferr));
		return;
	}
	if (d->d_size != 24) {
		warnx("invalid MIPS abiflags section size");
		return;
	}

	p = d->d_buf;
	version = re->dw_decode(&p, 2);
	printf("MIPS ABI Flags Version: %u", version);
	if (version != 0) {
		printf(" (unknown)\n\n");
		return;
	}
	printf("\n\n");

	isa_level = re->dw_decode(&p, 1);
	isa_rev = re->dw_decode(&p, 1);
	gpr_size = re->dw_decode(&p, 1);
	cpr1_size = re->dw_decode(&p, 1);
	cpr2_size = re->dw_decode(&p, 1);
	fp_abi = re->dw_decode(&p, 1);
	isa_ext = re->dw_decode(&p, 4);
	ases = re->dw_decode(&p, 4);
	flags1 = re->dw_decode(&p, 4);
	flags2 = re->dw_decode(&p, 4);

	printf("ISA: ");
	if (isa_rev <= 1)
		printf("MIPS%u\n", isa_level);
	else
		printf("MIPS%ur%u\n", isa_level, isa_rev);
	printf("GPR size: %d\n", get_mips_register_size(gpr_size));
	printf("CPR1 size: %d\n", get_mips_register_size(cpr1_size));
	printf("CPR2 size: %d\n", get_mips_register_size(cpr2_size));
	printf("FP ABI: ");
	switch (fp_abi) {
	case 3:
		printf("Soft float");
		break;
	default:
		printf("%u", fp_abi);
		break;
	}
	printf("\nISA Extension: %u\n", isa_ext);
	printf("ASEs: %u\n", ases);
	printf("FLAGS 1: %08x\n", flags1);
	printf("FLAGS 2: %08x\n", flags2);
}

static int
get_mips_register_size(uint8_t flag)
{
	switch (flag) {
	case 0: return 0;
	case 1: return 32;
	case 2: return 64;
	case 3: return 128;
	default: return -1;
	}
}
static void
dump_mips_reginfo(struct readelf *re, struct section *s)
{
	Elf_Data *d;
	int elferr, len;

	(void) elf_errno();
	if ((d = elf_rawdata(s->scn, NULL)) == NULL) {
		elferr = elf_errno();
		if (elferr != 0)
			warnx("elf_rawdata failed: %s",
			    elf_errmsg(elferr));
		return;
	}
	if (d->d_size <= 0)
		return;
	if (!get_ent_count(s, &len))
		return;

	printf("\nSection '%s' contains %d entries:\n", s->name, len);
	dump_mips_odk_reginfo(re, d->d_buf, d->d_size);
}

static void
dump_mips_options(struct readelf *re, struct section *s)
{
	Elf_Data *d;
	uint32_t info;
	uint16_t sndx;
	uint8_t *p, *pe;
	uint8_t kind, size;
	int elferr;

	(void) elf_errno();
	if ((d = elf_rawdata(s->scn, NULL)) == NULL) {
		elferr = elf_errno();
		if (elferr != 0)
			warnx("elf_rawdata failed: %s",
			    elf_errmsg(elferr));
		return;
	}
	if (d->d_size == 0)
		return;

	printf("\nSection %s contains:\n", s->name);
	p = d->d_buf;
	pe = p + d->d_size;
	while (p < pe) {
		if (pe - p < 8) {
			warnx("Truncated MIPS option header");
			return;
		}
		kind = re->dw_decode(&p, 1);
		size = re->dw_decode(&p, 1);
		sndx = re->dw_decode(&p, 2);
		info = re->dw_decode(&p, 4);
		if (size < 8 || size - 8 > pe - p) {
			warnx("Malformed MIPS option header");
			return;
		}
		size -= 8;
		switch (kind) {
		case ODK_REGINFO:
			dump_mips_odk_reginfo(re, p, size);
			break;
		case ODK_EXCEPTIONS:
			printf(" EXCEPTIONS FPU_MIN: %#x\n",
			    info & OEX_FPU_MIN);
			printf("%11.11s FPU_MAX: %#x\n", "",
			    info & OEX_FPU_MAX);
			dump_mips_option_flags("", mips_exceptions_option,
			    info);
			break;
		case ODK_PAD:
			printf(" %-10.10s section: %ju\n", "OPAD",
			    (uintmax_t) sndx);
			dump_mips_option_flags("", mips_pad_option, info);
			break;
		case ODK_HWPATCH:
			dump_mips_option_flags("HWPATCH", mips_hwpatch_option,
			    info);
			break;
		case ODK_HWAND:
			dump_mips_option_flags("HWAND", mips_hwa_option, info);
			break;
		case ODK_HWOR:
			dump_mips_option_flags("HWOR", mips_hwo_option, info);
			break;
		case ODK_FILL:
			printf(" %-10.10s %#jx\n", "FILL", (uintmax_t) info);
			break;
		case ODK_TAGS:
			printf(" %-10.10s\n", "TAGS");
			break;
		case ODK_GP_GROUP:
			printf(" %-10.10s GP group number: %#x\n", "GP_GROUP",
			    info & 0xFFFF);
			if (info & 0x10000)
				printf(" %-10.10s GP group is "
				    "self-contained\n", "");
			break;
		case ODK_IDENT:
			printf(" %-10.10s default GP group number: %#x\n",
			    "IDENT", info & 0xFFFF);
			if (info & 0x10000)
				printf(" %-10.10s default GP group is "
				    "self-contained\n", "");
			break;
		case ODK_PAGESIZE:
			printf(" %-10.10s\n", "PAGESIZE");
			break;
		default:
			break;
		}
		p += size;
	}
}

static void
dump_mips_option_flags(const char *name, struct mips_option *opt, uint64_t info)
{
	int first;

	first = 1;
	for (; opt->desc != NULL; opt++) {
		if (info & opt->flag) {
			printf(" %-10.10s %s\n", first ? name : "",
			    opt->desc);
			first = 0;
		}
	}
}

static void
dump_mips_odk_reginfo(struct readelf *re, uint8_t *p, size_t sz)
{
	uint32_t ri_gprmask;
	uint32_t ri_cprmask[4];
	uint64_t ri_gp_value;
	uint8_t *pe;
	int i;

	pe = p + sz;
	while (p < pe) {
		ri_gprmask = re->dw_decode(&p, 4);
		/* Skip ri_pad padding field for mips64. */
		if (re->ec == ELFCLASS64)
			re->dw_decode(&p, 4);
		for (i = 0; i < 4; i++)
			ri_cprmask[i] = re->dw_decode(&p, 4);
		if (re->ec == ELFCLASS32)
			ri_gp_value = re->dw_decode(&p, 4);
		else
			ri_gp_value = re->dw_decode(&p, 8);
		printf(" %s    ", option_kind(ODK_REGINFO));
		printf("ri_gprmask:    0x%08jx\n", (uintmax_t) ri_gprmask);
		for (i = 0; i < 4; i++)
			printf("%11.11s ri_cprmask[%d]: 0x%08jx\n", "", i,
			    (uintmax_t) ri_cprmask[i]);
		printf("%12.12s", "");
		printf("ri_gp_value:   %#jx\n", (uintmax_t) ri_gp_value);
	}
}

static void
dump_arch_specific_info(struct readelf *re)
{

	dump_liblist(re);
	dump_attributes(re);

	switch (re->ehdr.e_machine) {
	case EM_MIPS:
	case EM_MIPS_RS3_LE:
		dump_mips_specific_info(re);
	default:
		break;
	}
}

static const char *
dwarf_regname(struct readelf *re, unsigned int num)
{
	static char rx[32];
	const char *rn;

	if ((rn = dwarf_reg(re->ehdr.e_machine, num)) != NULL)
		return (rn);

	snprintf(rx, sizeof(rx), "r%u", num);

	return (rx);
}

static void
dump_dwarf_line(struct readelf *re)
{
	struct section *s;
	Dwarf_Die die;
	Dwarf_Error de;
	Dwarf_Half tag, version, pointer_size;
	Dwarf_Unsigned offset, endoff, length, hdrlen, dirndx, mtime, fsize;
	Dwarf_Small minlen, defstmt, lrange, opbase, oplen;
	Elf_Data *d;
	char *pn;
	uint64_t address, file, line, column, isa, opsize, udelta;
	int64_t sdelta;
	uint8_t *p, *pe;
	int8_t lbase;
	int i, is_stmt, dwarf_size, elferr, ret;

	printf("\nDump of debug contents of section .debug_line:\n");

	s = NULL;
	for (i = 0; (size_t) i < re->shnum; i++) {
		s = &re->sl[i];
		if (s->name != NULL && !strcmp(s->name, ".debug_line"))
			break;
	}
	if ((size_t) i >= re->shnum)
		return;

	(void) elf_errno();
	if ((d = elf_getdata(s->scn, NULL)) == NULL) {
		elferr = elf_errno();
		if (elferr != 0)
			warnx("elf_getdata failed: %s", elf_errmsg(-1));
		return;
	}
	if (d->d_size <= 0)
		return;

	while ((ret = dwarf_next_cu_header(re->dbg, NULL, NULL, NULL, NULL,
	    NULL, &de)) ==  DW_DLV_OK) {
		die = NULL;
		while (dwarf_siblingof(re->dbg, die, &die, &de) == DW_DLV_OK) {
			if (dwarf_tag(die, &tag, &de) != DW_DLV_OK) {
				warnx("dwarf_tag failed: %s",
				    dwarf_errmsg(de));
				return;
			}
			/* XXX: What about DW_TAG_partial_unit? */
			if (tag == DW_TAG_compile_unit)
				break;
		}
		if (die == NULL) {
			warnx("could not find DW_TAG_compile_unit die");
			return;
		}
		if (dwarf_attrval_unsigned(die, DW_AT_stmt_list, &offset,
		    &de) != DW_DLV_OK) {
			dwarf_dealloc(re->dbg, die, DW_DLA_DIE);
			continue;
		}

		length = re->dw_read(d, &offset, 4);
		if (length == 0xffffffff) {
			dwarf_size = 8;
			length = re->dw_read(d, &offset, 8);
		} else
			dwarf_size = 4;

		if (length > d->d_size - offset) {
			warnx("invalid .dwarf_line section");
			dwarf_dealloc(re->dbg, die, DW_DLA_DIE);
			continue;
		}

		endoff = offset + length;
		pe = (uint8_t *) d->d_buf + endoff;
		version = re->dw_read(d, &offset, 2);
		hdrlen = re->dw_read(d, &offset, dwarf_size);
		minlen = re->dw_read(d, &offset, 1);
		defstmt = re->dw_read(d, &offset, 1);
		lbase = re->dw_read(d, &offset, 1);
		lrange = re->dw_read(d, &offset, 1);
		opbase = re->dw_read(d, &offset, 1);

		printf("\n");
		printf("  Length:\t\t\t%ju\n", (uintmax_t) length);
		printf("  DWARF version:\t\t%u\n", version);
		printf("  Prologue Length:\t\t%ju\n", (uintmax_t) hdrlen);
		printf("  Minimum Instruction Length:\t%u\n", minlen);
		printf("  Initial value of 'is_stmt':\t%u\n", defstmt);
		printf("  Line Base:\t\t\t%d\n", lbase);
		printf("  Line Range:\t\t\t%u\n", lrange);
		printf("  Opcode Base:\t\t\t%u\n", opbase);
		(void) dwarf_get_address_size(re->dbg, &pointer_size, &de);
		printf("  (Pointer size:\t\t%u)\n", pointer_size);

		printf("\n");
		printf(" Opcodes:\n");
		for (i = 1; i < opbase; i++) {
			oplen = re->dw_read(d, &offset, 1);
			printf("  Opcode %d has %u args\n", i, oplen);
		}

		printf("\n");
		printf(" The Directory Table:\n");
		p = (uint8_t *) d->d_buf + offset;
		while (*p != '\0') {
			printf("  %s\n", (char *) p);
			p += strlen((char *) p) + 1;
		}

		p++;
		printf("\n");
		printf(" The File Name Table:\n");
		printf("  Entry\tDir\tTime\tSize\tName\n");
		i = 0;
		while (*p != '\0') {
			i++;
			pn = (char *) p;
			p += strlen(pn) + 1;
			dirndx = _decode_uleb128(&p, pe);
			mtime = _decode_uleb128(&p, pe);
			fsize = _decode_uleb128(&p, pe);
			printf("  %d\t%ju\t%ju\t%ju\t%s\n", i,
			    (uintmax_t) dirndx, (uintmax_t) mtime,
			    (uintmax_t) fsize, pn);
		}

#define	RESET_REGISTERS						\
	do {							\
		address	       = 0;				\
		file	       = 1;				\
		line	       = 1;				\
		column	       = 0;				\
		is_stmt	       = defstmt;			\
	} while(0)

#define	LINE(x) (lbase + (((x) - opbase) % lrange))
#define	ADDRESS(x) ((((x) - opbase) / lrange) * minlen)

		p++;
		printf("\n");
		printf(" Line Number Statements:\n");

		RESET_REGISTERS;

		while (p < pe) {

			if (*p == 0) {
				/*
				 * Extended Opcodes.
				 */
				p++;
				opsize = _decode_uleb128(&p, pe);
				printf("  Extended opcode %u: ", *p);
				switch (*p) {
				case DW_LNE_end_sequence:
					p++;
					RESET_REGISTERS;
					printf("End of Sequence\n");
					break;
				case DW_LNE_set_address:
					p++;
					address = re->dw_decode(&p,
					    pointer_size);
					printf("set Address to %#jx\n",
					    (uintmax_t) address);
					break;
				case DW_LNE_define_file:
					p++;
					pn = (char *) p;
					p += strlen(pn) + 1;
					dirndx = _decode_uleb128(&p, pe);
					mtime = _decode_uleb128(&p, pe);
					fsize = _decode_uleb128(&p, pe);
					printf("define new file: %s\n", pn);
					break;
				default:
					/* Unrecognized extened opcodes. */
					p += opsize;
					printf("unknown opcode\n");
				}
			} else if (*p > 0 && *p < opbase) {
				/*
				 * Standard Opcodes.
				 */
				switch(*p++) {
				case DW_LNS_copy:
					printf("  Copy\n");
					break;
				case DW_LNS_advance_pc:
					udelta = _decode_uleb128(&p, pe) *
					    minlen;
					address += udelta;
					printf("  Advance PC by %ju to %#jx\n",
					    (uintmax_t) udelta,
					    (uintmax_t) address);
					break;
				case DW_LNS_advance_line:
					sdelta = _decode_sleb128(&p, pe);
					line += sdelta;
					printf("  Advance Line by %jd to %ju\n",
					    (intmax_t) sdelta,
					    (uintmax_t) line);
					break;
				case DW_LNS_set_file:
					file = _decode_uleb128(&p, pe);
					printf("  Set File to %ju\n",
					    (uintmax_t) file);
					break;
				case DW_LNS_set_column:
					column = _decode_uleb128(&p, pe);
					printf("  Set Column to %ju\n",
					    (uintmax_t) column);
					break;
				case DW_LNS_negate_stmt:
					is_stmt = !is_stmt;
					printf("  Set is_stmt to %d\n", is_stmt);
					break;
				case DW_LNS_set_basic_block:
					printf("  Set basic block flag\n");
					break;
				case DW_LNS_const_add_pc:
					address += ADDRESS(255);
					printf("  Advance PC by constant %ju"
					    " to %#jx\n",
					    (uintmax_t) ADDRESS(255),
					    (uintmax_t) address);
					break;
				case DW_LNS_fixed_advance_pc:
					udelta = re->dw_decode(&p, 2);
					address += udelta;
					printf("  Advance PC by fixed value "
					    "%ju to %#jx\n",
					    (uintmax_t) udelta,
					    (uintmax_t) address);
					break;
				case DW_LNS_set_prologue_end:
					printf("  Set prologue end flag\n");
					break;
				case DW_LNS_set_epilogue_begin:
					printf("  Set epilogue begin flag\n");
					break;
				case DW_LNS_set_isa:
					isa = _decode_uleb128(&p, pe);
					printf("  Set isa to %ju\n",
					    (uintmax_t) isa);
					break;
				default:
					/* Unrecognized extended opcodes. */
					printf("  Unknown extended opcode %u\n",
					    *(p - 1));
					break;
				}

			} else {
				/*
				 * Special Opcodes.
				 */
				line += LINE(*p);
				address += ADDRESS(*p);
				printf("  Special opcode %u: advance Address "
				    "by %ju to %#jx and Line by %jd to %ju\n",
				    *p - opbase, (uintmax_t) ADDRESS(*p),
				    (uintmax_t) address, (intmax_t) LINE(*p),
				    (uintmax_t) line);
				p++;
			}
		}
		dwarf_dealloc(re->dbg, die, DW_DLA_DIE);
	}
	if (ret == DW_DLV_ERROR)
		warnx("dwarf_next_cu_header: %s", dwarf_errmsg(de));

#undef	RESET_REGISTERS
#undef	LINE
#undef	ADDRESS
}

static void
dump_dwarf_line_decoded(struct readelf *re)
{
	Dwarf_Die die;
	Dwarf_Line *linebuf, ln;
	Dwarf_Addr lineaddr;
	Dwarf_Signed linecount, srccount;
	Dwarf_Unsigned lineno, fn;
	Dwarf_Error de;
	const char *dir, *file;
	char **srcfiles;
	int i, ret;

	printf("Decoded dump of debug contents of section .debug_line:\n\n");
	while ((ret = dwarf_next_cu_header(re->dbg, NULL, NULL, NULL, NULL,
	    NULL, &de)) == DW_DLV_OK) {
		if (dwarf_siblingof(re->dbg, NULL, &die, &de) != DW_DLV_OK)
			continue;
		if (dwarf_attrval_string(die, DW_AT_name, &file, &de) !=
		    DW_DLV_OK)
			file = NULL;
		if (dwarf_attrval_string(die, DW_AT_comp_dir, &dir, &de) !=
		    DW_DLV_OK)
			dir = NULL;
		printf("CU: ");
		if (dir && file && file[0] != '/')
			printf("%s/", dir);
		if (file)
			printf("%s", file);
		putchar('\n');
		printf("%-37s %11s   %s\n", "Filename", "Line Number",
		    "Starting Address");
		if (dwarf_srclines(die, &linebuf, &linecount, &de) != DW_DLV_OK)
			goto done;
		if (dwarf_srcfiles(die, &srcfiles, &srccount, &de) != DW_DLV_OK)
			goto done;
		for (i = 0; i < linecount; i++) {
			ln = linebuf[i];
			if (dwarf_line_srcfileno(ln, &fn, &de) != DW_DLV_OK)
				continue;
			if (dwarf_lineno(ln, &lineno, &de) != DW_DLV_OK)
				continue;
			if (dwarf_lineaddr(ln, &lineaddr, &de) != DW_DLV_OK)
				continue;
			printf("%-37s %11ju %#18jx\n",
			    basename(srcfiles[fn - 1]), (uintmax_t) lineno,
			    (uintmax_t) lineaddr);
		}
		putchar('\n');
done:
		dwarf_dealloc(re->dbg, die, DW_DLA_DIE);
	}
}

static void
dump_dwarf_die(struct readelf *re, Dwarf_Die die, int level)
{
	Dwarf_Attribute *attr_list;
	Dwarf_Die ret_die;
	Dwarf_Off dieoff, cuoff, culen, attroff;
	Dwarf_Unsigned ate, lang, v_udata, v_sig;
	Dwarf_Signed attr_count, v_sdata;
	Dwarf_Off v_off;
	Dwarf_Addr v_addr;
	Dwarf_Half tag, attr, form;
	Dwarf_Block *v_block;
	Dwarf_Bool v_bool, is_info;
	Dwarf_Sig8 v_sig8;
	Dwarf_Error de;
	Dwarf_Ptr v_expr;
	const char *tag_str, *attr_str, *ate_str, *lang_str;
	char unk_tag[32], unk_attr[32];
	char *v_str;
	uint8_t *b, *p;
	int i, j, abc, ret;

	if (dwarf_dieoffset(die, &dieoff, &de) != DW_DLV_OK) {
		warnx("dwarf_dieoffset failed: %s", dwarf_errmsg(de));
		goto cont_search;
	}

	printf(" <%d><%jx>: ", level, (uintmax_t) dieoff);

	if (dwarf_die_CU_offset_range(die, &cuoff, &culen, &de) != DW_DLV_OK) {
		warnx("dwarf_die_CU_offset_range failed: %s",
		      dwarf_errmsg(de));
		cuoff = 0;
	}

	abc = dwarf_die_abbrev_code(die);
	if (dwarf_tag(die, &tag, &de) != DW_DLV_OK) {
		warnx("dwarf_tag failed: %s", dwarf_errmsg(de));
		goto cont_search;
	}
	if (dwarf_get_TAG_name(tag, &tag_str) != DW_DLV_OK) {
		snprintf(unk_tag, sizeof(unk_tag), "[Unknown Tag: %#x]", tag);
		tag_str = unk_tag;
	}

	printf("Abbrev Number: %d (%s)\n", abc, tag_str);

	if ((ret = dwarf_attrlist(die, &attr_list, &attr_count, &de)) !=
	    DW_DLV_OK) {
		if (ret == DW_DLV_ERROR)
			warnx("dwarf_attrlist failed: %s", dwarf_errmsg(de));
		goto cont_search;
	}

	for (i = 0; i < attr_count; i++) {
		if (dwarf_whatform(attr_list[i], &form, &de) != DW_DLV_OK) {
			warnx("dwarf_whatform failed: %s", dwarf_errmsg(de));
			continue;
		}
		if (dwarf_whatattr(attr_list[i], &attr, &de) != DW_DLV_OK) {
			warnx("dwarf_whatattr failed: %s", dwarf_errmsg(de));
			continue;
		}
		if (dwarf_get_AT_name(attr, &attr_str) != DW_DLV_OK) {
			snprintf(unk_attr, sizeof(unk_attr),
			    "[Unknown AT: %#x]", attr);
			attr_str = unk_attr;
		}
		if (dwarf_attroffset(attr_list[i], &attroff, &de) !=
		    DW_DLV_OK) {
			warnx("dwarf_attroffset failed: %s", dwarf_errmsg(de));
			attroff = 0;
		}
		printf("    <%jx>   %-18s: ", (uintmax_t) attroff, attr_str);
		switch (form) {
		case DW_FORM_ref_addr:
		case DW_FORM_sec_offset:
			if (dwarf_global_formref(attr_list[i], &v_off, &de) !=
			    DW_DLV_OK) {
				warnx("dwarf_global_formref failed: %s",
				    dwarf_errmsg(de));
				continue;
			}
			if (form == DW_FORM_ref_addr)
				printf("<0x%jx>", (uintmax_t) v_off);
			else
				printf("0x%jx", (uintmax_t) v_off);
			break;

		case DW_FORM_ref1:
		case DW_FORM_ref2:
		case DW_FORM_ref4:
		case DW_FORM_ref8:
		case DW_FORM_ref_udata:
			if (dwarf_formref(attr_list[i], &v_off, &de) !=
			    DW_DLV_OK) {
				warnx("dwarf_formref failed: %s",
				    dwarf_errmsg(de));
				continue;
			}
			v_off += cuoff;
			printf("<0x%jx>", (uintmax_t) v_off);
			break;

		case DW_FORM_addr:
			if (dwarf_formaddr(attr_list[i], &v_addr, &de) !=
			    DW_DLV_OK) {
				warnx("dwarf_formaddr failed: %s",
				    dwarf_errmsg(de));
				continue;
			}
			printf("%#jx", (uintmax_t) v_addr);
			break;

		case DW_FORM_data1:
		case DW_FORM_data2:
		case DW_FORM_data4:
		case DW_FORM_data8:
		case DW_FORM_udata:
			if (dwarf_formudata(attr_list[i], &v_udata, &de) !=
			    DW_DLV_OK) {
				warnx("dwarf_formudata failed: %s",
				    dwarf_errmsg(de));
				continue;
			}
			if (attr == DW_AT_high_pc)
				printf("0x%jx", (uintmax_t) v_udata);
			else
				printf("%ju", (uintmax_t) v_udata);
			break;

		case DW_FORM_sdata:
			if (dwarf_formsdata(attr_list[i], &v_sdata, &de) !=
			    DW_DLV_OK) {
				warnx("dwarf_formudata failed: %s",
				    dwarf_errmsg(de));
				continue;
			}
			printf("%jd", (intmax_t) v_sdata);
			break;

		case DW_FORM_flag:
			if (dwarf_formflag(attr_list[i], &v_bool, &de) !=
			    DW_DLV_OK) {
				warnx("dwarf_formflag failed: %s",
				    dwarf_errmsg(de));
				continue;
			}
			printf("%jd", (intmax_t) v_bool);
			break;

		case DW_FORM_flag_present:
			putchar('1');
			break;

		case DW_FORM_string:
		case DW_FORM_strp:
			if (dwarf_formstring(attr_list[i], &v_str, &de) !=
			    DW_DLV_OK) {
				warnx("dwarf_formstring failed: %s",
				    dwarf_errmsg(de));
				continue;
			}
			if (form == DW_FORM_string)
				printf("%s", v_str);
			else
				printf("(indirect string) %s", v_str);
			break;

		case DW_FORM_block:
		case DW_FORM_block1:
		case DW_FORM_block2:
		case DW_FORM_block4:
			if (dwarf_formblock(attr_list[i], &v_block, &de) !=
			    DW_DLV_OK) {
				warnx("dwarf_formblock failed: %s",
				    dwarf_errmsg(de));
				continue;
			}
			printf("%ju byte block:", (uintmax_t) v_block->bl_len);
			b = v_block->bl_data;
			for (j = 0; (Dwarf_Unsigned) j < v_block->bl_len; j++)
				printf(" %x", b[j]);
			printf("\t(");
			dump_dwarf_block(re, v_block->bl_data, v_block->bl_len);
			putchar(')');
			break;

		case DW_FORM_exprloc:
			if (dwarf_formexprloc(attr_list[i], &v_udata, &v_expr,
			    &de) != DW_DLV_OK) {
				warnx("dwarf_formexprloc failed: %s",
				    dwarf_errmsg(de));
				continue;
			}
			printf("%ju byte block:", (uintmax_t) v_udata);
			b = v_expr;
			for (j = 0; (Dwarf_Unsigned) j < v_udata; j++)
				printf(" %x", b[j]);
			printf("\t(");
			dump_dwarf_block(re, v_expr, v_udata);
			putchar(')');
			break;

		case DW_FORM_ref_sig8:
			if (dwarf_formsig8(attr_list[i], &v_sig8, &de) !=
			    DW_DLV_OK) {
				warnx("dwarf_formsig8 failed: %s",
				    dwarf_errmsg(de));
				continue;
			}
			p = (uint8_t *)(uintptr_t) &v_sig8.signature[0];
			v_sig = re->dw_decode(&p, 8);
			printf("signature: 0x%jx", (uintmax_t) v_sig);
		}
		switch (attr) {
		case DW_AT_encoding:
			if (dwarf_attrval_unsigned(die, attr, &ate, &de) !=
			    DW_DLV_OK)
				break;
			if (dwarf_get_ATE_name(ate, &ate_str) != DW_DLV_OK)
				ate_str = "DW_ATE_UNKNOWN";
			printf("\t(%s)", &ate_str[strlen("DW_ATE_")]);
			break;

		case DW_AT_language:
			if (dwarf_attrval_unsigned(die, attr, &lang, &de) !=
			    DW_DLV_OK)
				break;
			if (dwarf_get_LANG_name(lang, &lang_str) != DW_DLV_OK)
				break;
			printf("\t(%s)", &lang_str[strlen("DW_LANG_")]);
			break;

		case DW_AT_location:
		case DW_AT_string_length:
		case DW_AT_return_addr:
		case DW_AT_data_member_location:
		case DW_AT_frame_base:
		case DW_AT_segment:
		case DW_AT_static_link:
		case DW_AT_use_location:
		case DW_AT_vtable_elem_location:
			switch (form) {
			case DW_FORM_data4:
			case DW_FORM_data8:
			case DW_FORM_sec_offset:
				printf("\t(location list)");
				break;
			default:
				break;
			}

		default:
			break;
		}
		putchar('\n');
	}


cont_search:
	/* Search children. */
	ret = dwarf_child(die, &ret_die, &de);
	if (ret == DW_DLV_ERROR)
		warnx("dwarf_child: %s", dwarf_errmsg(de));
	else if (ret == DW_DLV_OK)
		dump_dwarf_die(re, ret_die, level + 1);

	/* Search sibling. */
	is_info = dwarf_get_die_infotypes_flag(die);
	ret = dwarf_siblingof_b(re->dbg, die, &ret_die, is_info, &de);
	if (ret == DW_DLV_ERROR)
		warnx("dwarf_siblingof: %s", dwarf_errmsg(de));
	else if (ret == DW_DLV_OK)
		dump_dwarf_die(re, ret_die, level);

	dwarf_dealloc(re->dbg, die, DW_DLA_DIE);
}

static void
set_cu_context(struct readelf *re, Dwarf_Half psize, Dwarf_Half osize,
    Dwarf_Half ver)
{

	re->cu_psize = psize;
	re->cu_osize = osize;
	re->cu_ver = ver;
}

static void
dump_dwarf_info(struct readelf *re, Dwarf_Bool is_info)
{
	struct section *s;
	Dwarf_Die die;
	Dwarf_Error de;
	Dwarf_Half tag, version, pointer_size, off_size;
	Dwarf_Off cu_offset, cu_length;
	Dwarf_Off aboff;
	Dwarf_Unsigned typeoff;
	Dwarf_Sig8 sig8;
	Dwarf_Unsigned sig;
	uint8_t *p;
	const char *sn;
	int i, ret;

	sn = is_info ? ".debug_info" : ".debug_types";

	s = NULL;
	for (i = 0; (size_t) i < re->shnum; i++) {
		s = &re->sl[i];
		if (s->name != NULL && !strcmp(s->name, sn))
			break;
	}
	if ((size_t) i >= re->shnum)
		return;

	do {
		printf("\nDump of debug contents of section %s:\n", sn);

		while ((ret = dwarf_next_cu_header_c(re->dbg, is_info, NULL,
		    &version, &aboff, &pointer_size, &off_size, NULL, &sig8,
		    &typeoff, NULL, &de)) == DW_DLV_OK) {
			set_cu_context(re, pointer_size, off_size, version);
			die = NULL;
			while (dwarf_siblingof_b(re->dbg, die, &die, is_info,
			    &de) == DW_DLV_OK) {
				if (dwarf_tag(die, &tag, &de) != DW_DLV_OK) {
					warnx("dwarf_tag failed: %s",
					    dwarf_errmsg(de));
					continue;
				}
				/* XXX: What about DW_TAG_partial_unit? */
				if ((is_info && tag == DW_TAG_compile_unit) ||
				    (!is_info && tag == DW_TAG_type_unit))
					break;
			}
			if (die == NULL && is_info) {
				warnx("could not find DW_TAG_compile_unit "
				    "die");
				continue;
			} else if (die == NULL && !is_info) {
				warnx("could not find DW_TAG_type_unit die");
				continue;
			}

			if (dwarf_die_CU_offset_range(die, &cu_offset,
			    &cu_length, &de) != DW_DLV_OK) {
				warnx("dwarf_die_CU_offset failed: %s",
				    dwarf_errmsg(de));
				continue;
			}

			cu_length -= off_size == 4 ? 4 : 12;

			sig = 0;
			if (!is_info) {
				p = (uint8_t *)(uintptr_t) &sig8.signature[0];
				sig = re->dw_decode(&p, 8);
			}

			printf("\n  Type Unit @ offset 0x%jx:\n",
			    (uintmax_t) cu_offset);
			printf("    Length:\t\t%#jx (%d-bit)\n",
			    (uintmax_t) cu_length, off_size == 4 ? 32 : 64);
			printf("    Version:\t\t%u\n", version);
			printf("    Abbrev Offset:\t0x%jx\n",
			    (uintmax_t) aboff);
			printf("    Pointer Size:\t%u\n", pointer_size);
			if (!is_info) {
				printf("    Signature:\t\t0x%016jx\n",
				    (uintmax_t) sig);
				printf("    Type Offset:\t0x%jx\n",
				    (uintmax_t) typeoff);
			}

			dump_dwarf_die(re, die, 0);
		}
		if (ret == DW_DLV_ERROR)
			warnx("dwarf_next_cu_header: %s", dwarf_errmsg(de));
		if (is_info)
			break;
	} while (dwarf_next_types_section(re->dbg, &de) == DW_DLV_OK);
}

static void
dump_dwarf_abbrev(struct readelf *re)
{
	Dwarf_Abbrev ab;
	Dwarf_Off aboff, atoff;
	Dwarf_Unsigned length, attr_count;
	Dwarf_Signed flag, form;
	Dwarf_Half tag, attr;
	Dwarf_Error de;
	const char *tag_str, *attr_str, *form_str;
	char unk_tag[32], unk_attr[32], unk_form[32];
	int i, j, ret;

	printf("\nContents of section .debug_abbrev:\n\n");

	while ((ret = dwarf_next_cu_header(re->dbg, NULL, NULL, &aboff,
	    NULL, NULL, &de)) ==  DW_DLV_OK) {
		printf("  Number TAG\n");
		i = 0;
		while ((ret = dwarf_get_abbrev(re->dbg, aboff, &ab, &length,
		    &attr_count, &de)) == DW_DLV_OK) {
			if (length == 1) {
				dwarf_dealloc(re->dbg, ab, DW_DLA_ABBREV);
				break;
			}
			aboff += length;
			printf("%4d", ++i);
			if (dwarf_get_abbrev_tag(ab, &tag, &de) != DW_DLV_OK) {
				warnx("dwarf_get_abbrev_tag failed: %s",
				    dwarf_errmsg(de));
				goto next_abbrev;
			}
			if (dwarf_get_TAG_name(tag, &tag_str) != DW_DLV_OK) {
				snprintf(unk_tag, sizeof(unk_tag),
				    "[Unknown Tag: %#x]", tag);
				tag_str = unk_tag;
			}
			if (dwarf_get_abbrev_children_flag(ab, &flag, &de) !=
			    DW_DLV_OK) {
				warnx("dwarf_get_abbrev_children_flag failed:"
				    " %s", dwarf_errmsg(de));
				goto next_abbrev;
			}
			printf("      %s    %s\n", tag_str,
			    flag ? "[has children]" : "[no children]");
			for (j = 0; (Dwarf_Unsigned) j < attr_count; j++) {
				if (dwarf_get_abbrev_entry(ab, (Dwarf_Signed) j,
				    &attr, &form, &atoff, &de) != DW_DLV_OK) {
					warnx("dwarf_get_abbrev_entry failed:"
					    " %s", dwarf_errmsg(de));
					continue;
				}
				if (dwarf_get_AT_name(attr, &attr_str) !=
				    DW_DLV_OK) {
					snprintf(unk_attr, sizeof(unk_attr),
					    "[Unknown AT: %#x]", attr);
					attr_str = unk_attr;
				}
				if (dwarf_get_FORM_name(form, &form_str) !=
				    DW_DLV_OK) {
					snprintf(unk_form, sizeof(unk_form),
					    "[Unknown Form: %#x]",
					    (Dwarf_Half) form);
					form_str = unk_form;
				}
				printf("    %-18s %s\n", attr_str, form_str);
			}
		next_abbrev:
			dwarf_dealloc(re->dbg, ab, DW_DLA_ABBREV);
		}
		if (ret != DW_DLV_OK)
			warnx("dwarf_get_abbrev: %s", dwarf_errmsg(de));
	}
	if (ret == DW_DLV_ERROR)
		warnx("dwarf_next_cu_header: %s", dwarf_errmsg(de));
}

static void
dump_dwarf_pubnames(struct readelf *re)
{
	struct section *s;
	Dwarf_Off die_off;
	Dwarf_Unsigned offset, length, nt_cu_offset, nt_cu_length;
	Dwarf_Signed cnt;
	Dwarf_Global *globs;
	Dwarf_Half nt_version;
	Dwarf_Error de;
	Elf_Data *d;
	char *glob_name;
	int i, dwarf_size, elferr;

	printf("\nContents of the .debug_pubnames section:\n");

	s = NULL;
	for (i = 0; (size_t) i < re->shnum; i++) {
		s = &re->sl[i];
		if (s->name != NULL && !strcmp(s->name, ".debug_pubnames"))
			break;
	}
	if ((size_t) i >= re->shnum)
		return;

	(void) elf_errno();
	if ((d = elf_getdata(s->scn, NULL)) == NULL) {
		elferr = elf_errno();
		if (elferr != 0)
			warnx("elf_getdata failed: %s", elf_errmsg(-1));
		return;
	}
	if (d->d_size <= 0)
		return;

	/* Read in .debug_pubnames section table header. */
	offset = 0;
	length = re->dw_read(d, &offset, 4);
	if (length == 0xffffffff) {
		dwarf_size = 8;
		length = re->dw_read(d, &offset, 8);
	} else
		dwarf_size = 4;

	if (length > d->d_size - offset) {
		warnx("invalid .dwarf_pubnames section");
		return;
	}

	nt_version = re->dw_read(d, &offset, 2);
	nt_cu_offset = re->dw_read(d, &offset, dwarf_size);
	nt_cu_length = re->dw_read(d, &offset, dwarf_size);
	printf("  Length:\t\t\t\t%ju\n", (uintmax_t) length);
	printf("  Version:\t\t\t\t%u\n", nt_version);
	printf("  Offset into .debug_info section:\t%ju\n",
	    (uintmax_t) nt_cu_offset);
	printf("  Size of area in .debug_info section:\t%ju\n",
	    (uintmax_t) nt_cu_length);

	if (dwarf_get_globals(re->dbg, &globs, &cnt, &de) != DW_DLV_OK) {
		warnx("dwarf_get_globals failed: %s", dwarf_errmsg(de));
		return;
	}

	printf("\n    Offset      Name\n");
	for (i = 0; i < cnt; i++) {
		if (dwarf_globname(globs[i], &glob_name, &de) != DW_DLV_OK) {
			warnx("dwarf_globname failed: %s", dwarf_errmsg(de));
			continue;
		}
		if (dwarf_global_die_offset(globs[i], &die_off, &de) !=
		    DW_DLV_OK) {
			warnx("dwarf_global_die_offset failed: %s",
			    dwarf_errmsg(de));
			continue;
		}
		printf("    %-11ju %s\n", (uintmax_t) die_off, glob_name);
	}
}

static void
dump_dwarf_aranges(struct readelf *re)
{
	struct section *s;
	Dwarf_Arange *aranges;
	Dwarf_Addr start;
	Dwarf_Unsigned offset, length, as_cu_offset;
	Dwarf_Off die_off;
	Dwarf_Signed cnt;
	Dwarf_Half as_version, as_addrsz, as_segsz;
	Dwarf_Error de;
	Elf_Data *d;
	int i, dwarf_size, elferr;

	printf("\nContents of section .debug_aranges:\n");

	s = NULL;
	for (i = 0; (size_t) i < re->shnum; i++) {
		s = &re->sl[i];
		if (s->name != NULL && !strcmp(s->name, ".debug_aranges"))
			break;
	}
	if ((size_t) i >= re->shnum)
		return;

	(void) elf_errno();
	if ((d = elf_getdata(s->scn, NULL)) == NULL) {
		elferr = elf_errno();
		if (elferr != 0)
			warnx("elf_getdata failed: %s", elf_errmsg(-1));
		return;
	}
	if (d->d_size <= 0)
		return;

	/* Read in the .debug_aranges section table header. */
	offset = 0;
	length = re->dw_read(d, &offset, 4);
	if (length == 0xffffffff) {
		dwarf_size = 8;
		length = re->dw_read(d, &offset, 8);
	} else
		dwarf_size = 4;

	if (length > d->d_size - offset) {
		warnx("invalid .dwarf_aranges section");
		return;
	}

	as_version = re->dw_read(d, &offset, 2);
	as_cu_offset = re->dw_read(d, &offset, dwarf_size);
	as_addrsz = re->dw_read(d, &offset, 1);
	as_segsz = re->dw_read(d, &offset, 1);

	printf("  Length:\t\t\t%ju\n", (uintmax_t) length);
	printf("  Version:\t\t\t%u\n", as_version);
	printf("  Offset into .debug_info:\t%ju\n", (uintmax_t) as_cu_offset);
	printf("  Pointer Size:\t\t\t%u\n", as_addrsz);
	printf("  Segment Size:\t\t\t%u\n", as_segsz);

	if (dwarf_get_aranges(re->dbg, &aranges, &cnt, &de) != DW_DLV_OK) {
		warnx("dwarf_get_aranges failed: %s", dwarf_errmsg(de));
		return;
	}

	printf("\n    Address  Length\n");
	for (i = 0; i < cnt; i++) {
		if (dwarf_get_arange_info(aranges[i], &start, &length,
		    &die_off, &de) != DW_DLV_OK) {
			warnx("dwarf_get_arange_info failed: %s",
			    dwarf_errmsg(de));
			continue;
		}
		printf("    %08jx %ju\n", (uintmax_t) start,
		    (uintmax_t) length);
	}
}

static void
dump_dwarf_ranges_foreach(struct readelf *re, Dwarf_Die die, Dwarf_Addr base)
{
	Dwarf_Attribute *attr_list;
	Dwarf_Ranges *ranges;
	Dwarf_Die ret_die;
	Dwarf_Error de;
	Dwarf_Addr base0;
	Dwarf_Half attr;
	Dwarf_Signed attr_count, cnt;
	Dwarf_Unsigned bytecnt;
	Dwarf_Off off;
	int i, j, ret;

	if ((ret = dwarf_attrlist(die, &attr_list, &attr_count, &de)) !=
	    DW_DLV_OK) {
		if (ret == DW_DLV_ERROR)
			warnx("dwarf_attrlist failed: %s", dwarf_errmsg(de));
		goto cont_search;
	}

	for (i = 0; i < attr_count; i++) {
		if (dwarf_whatattr(attr_list[i], &attr, &de) != DW_DLV_OK) {
			warnx("dwarf_whatattr failed: %s", dwarf_errmsg(de));
			continue;
		}
		if (attr != DW_AT_ranges)
			continue;
		if (dwarf_global_formref(attr_list[i], &off, &de) != DW_DLV_OK) {
			warnx("dwarf_global_formref failed: %s",
			    dwarf_errmsg(de));
			continue;
		}
		if (dwarf_get_ranges(re->dbg, off, &ranges, &cnt,
		    &bytecnt, &de) != DW_DLV_OK)
			continue;
		base0 = base;
		for (j = 0; j < cnt; j++) {
			printf("    %08jx ", (uintmax_t) off);
			if (ranges[j].dwr_type == DW_RANGES_END) {
				printf("%s\n", "<End of list>");
				continue;
			} else if (ranges[j].dwr_type ==
			    DW_RANGES_ADDRESS_SELECTION) {
				base0 = ranges[j].dwr_addr2;
				continue;
			}
			if (re->ec == ELFCLASS32)
				printf("%08jx %08jx\n",
				    (uintmax_t) (ranges[j].dwr_addr1 + base0),
				    (uintmax_t) (ranges[j].dwr_addr2 + base0));
			else
				printf("%016jx %016jx\n",
				    (uintmax_t) (ranges[j].dwr_addr1 + base0),
				    (uintmax_t) (ranges[j].dwr_addr2 + base0));
		}
	}

cont_search:
	/* Search children. */
	ret = dwarf_child(die, &ret_die, &de);
	if (ret == DW_DLV_ERROR)
		warnx("dwarf_child: %s", dwarf_errmsg(de));
	else if (ret == DW_DLV_OK)
		dump_dwarf_ranges_foreach(re, ret_die, base);

	/* Search sibling. */
	ret = dwarf_siblingof(re->dbg, die, &ret_die, &de);
	if (ret == DW_DLV_ERROR)
		warnx("dwarf_siblingof: %s", dwarf_errmsg(de));
	else if (ret == DW_DLV_OK)
		dump_dwarf_ranges_foreach(re, ret_die, base);

	dwarf_dealloc(re->dbg, die, DW_DLA_DIE);
}

static void
dump_dwarf_ranges(struct readelf *re)
{
	Dwarf_Ranges *ranges;
	Dwarf_Die die;
	Dwarf_Signed cnt;
	Dwarf_Unsigned bytecnt;
	Dwarf_Half tag;
	Dwarf_Error de;
	Dwarf_Unsigned lowpc;
	int ret;

	if (dwarf_get_ranges(re->dbg, 0, &ranges, &cnt, &bytecnt, &de) !=
	    DW_DLV_OK)
		return;

	printf("Contents of the .debug_ranges section:\n\n");
	if (re->ec == ELFCLASS32)
		printf("    %-8s %-8s %s\n", "Offset", "Begin", "End");
	else
		printf("    %-8s %-16s %s\n", "Offset", "Begin", "End");

	while ((ret = dwarf_next_cu_header(re->dbg, NULL, NULL, NULL, NULL,
	    NULL, &de)) == DW_DLV_OK) {
		die = NULL;
		if (dwarf_siblingof(re->dbg, die, &die, &de) != DW_DLV_OK)
			continue;
		if (dwarf_tag(die, &tag, &de) != DW_DLV_OK) {
			warnx("dwarf_tag failed: %s", dwarf_errmsg(de));
			continue;
		}
		/* XXX: What about DW_TAG_partial_unit? */
		lowpc = 0;
		if (tag == DW_TAG_compile_unit) {
			if (dwarf_attrval_unsigned(die, DW_AT_low_pc, &lowpc,
			    &de) != DW_DLV_OK)
				lowpc = 0;
		}

		dump_dwarf_ranges_foreach(re, die, (Dwarf_Addr) lowpc);
	}
	putchar('\n');
}

static void
dump_dwarf_macinfo(struct readelf *re)
{
	Dwarf_Unsigned offset;
	Dwarf_Signed cnt;
	Dwarf_Macro_Details *md;
	Dwarf_Error de;
	const char *mi_str;
	char unk_mi[32];
	int i;

#define	_MAX_MACINFO_ENTRY	65535

	printf("\nContents of section .debug_macinfo:\n\n");

	offset = 0;
	while (dwarf_get_macro_details(re->dbg, offset, _MAX_MACINFO_ENTRY,
	    &cnt, &md, &de) == DW_DLV_OK) {
		for (i = 0; i < cnt; i++) {
			offset = md[i].dmd_offset + 1;
			if (md[i].dmd_type == 0)
				break;
			if (dwarf_get_MACINFO_name(md[i].dmd_type, &mi_str) !=
			    DW_DLV_OK) {
				snprintf(unk_mi, sizeof(unk_mi),
				    "[Unknown MACINFO: %#x]", md[i].dmd_type);
				mi_str = unk_mi;
			}
			printf(" %s", mi_str);
			switch (md[i].dmd_type) {
			case DW_MACINFO_define:
			case DW_MACINFO_undef:
				printf(" - lineno : %jd macro : %s\n",
				    (intmax_t) md[i].dmd_lineno,
				    md[i].dmd_macro);
				break;
			case DW_MACINFO_start_file:
				printf(" - lineno : %jd filenum : %jd\n",
				    (intmax_t) md[i].dmd_lineno,
				    (intmax_t) md[i].dmd_fileindex);
				break;
			default:
				putchar('\n');
				break;
			}
		}
	}

#undef	_MAX_MACINFO_ENTRY
}

static void
dump_dwarf_frame_inst(struct readelf *re, Dwarf_Cie cie, uint8_t *insts,
    Dwarf_Unsigned len, Dwarf_Unsigned caf, Dwarf_Signed daf, Dwarf_Addr pc,
    Dwarf_Debug dbg)
{
	Dwarf_Frame_Op *oplist;
	Dwarf_Signed opcnt, delta;
	Dwarf_Small op;
	Dwarf_Error de;
	const char *op_str;
	char unk_op[32];
	int i;

	if (dwarf_expand_frame_instructions(cie, insts, len, &oplist,
	    &opcnt, &de) != DW_DLV_OK) {
		warnx("dwarf_expand_frame_instructions failed: %s",
		    dwarf_errmsg(de));
		return;
	}

	for (i = 0; i < opcnt; i++) {
		if (oplist[i].fp_base_op != 0)
			op = oplist[i].fp_base_op << 6;
		else
			op = oplist[i].fp_extended_op;
		if (dwarf_get_CFA_name(op, &op_str) != DW_DLV_OK) {
			snprintf(unk_op, sizeof(unk_op), "[Unknown CFA: %#x]",
			    op);
			op_str = unk_op;
		}
		printf("  %s", op_str);
		switch (op) {
		case DW_CFA_advance_loc:
			delta = oplist[i].fp_offset * caf;
			pc += delta;
			printf(": %ju to %08jx", (uintmax_t) delta,
			    (uintmax_t) pc);
			break;
		case DW_CFA_offset:
		case DW_CFA_offset_extended:
		case DW_CFA_offset_extended_sf:
			delta = oplist[i].fp_offset * daf;
			printf(": r%u (%s) at cfa%+jd", oplist[i].fp_register,
			    dwarf_regname(re, oplist[i].fp_register),
			    (intmax_t) delta);
			break;
		case DW_CFA_restore:
			printf(": r%u (%s)", oplist[i].fp_register,
			    dwarf_regname(re, oplist[i].fp_register));
			break;
		case DW_CFA_set_loc:
			pc = oplist[i].fp_offset;
			printf(": to %08jx", (uintmax_t) pc);
			break;
		case DW_CFA_advance_loc1:
		case DW_CFA_advance_loc2:
		case DW_CFA_advance_loc4:
			pc += oplist[i].fp_offset;
			printf(": %jd to %08jx", (intmax_t) oplist[i].fp_offset,
			    (uintmax_t) pc);
			break;
		case DW_CFA_def_cfa:
			printf(": r%u (%s) ofs %ju", oplist[i].fp_register,
			    dwarf_regname(re, oplist[i].fp_register),
			    (uintmax_t) oplist[i].fp_offset);
			break;
		case DW_CFA_def_cfa_sf:
			printf(": r%u (%s) ofs %jd", oplist[i].fp_register,
			    dwarf_regname(re, oplist[i].fp_register),
			    (intmax_t) (oplist[i].fp_offset * daf));
			break;
		case DW_CFA_def_cfa_register:
			printf(": r%u (%s)", oplist[i].fp_register,
			    dwarf_regname(re, oplist[i].fp_register));
			break;
		case DW_CFA_def_cfa_offset:
			printf(": %ju", (uintmax_t) oplist[i].fp_offset);
			break;
		case DW_CFA_def_cfa_offset_sf:
			printf(": %jd", (intmax_t) (oplist[i].fp_offset * daf));
			break;
		default:
			break;
		}
		putchar('\n');
	}

	dwarf_dealloc(dbg, oplist, DW_DLA_FRAME_BLOCK);
}

static char *
get_regoff_str(struct readelf *re, Dwarf_Half reg, Dwarf_Addr off)
{
	static char rs[16];

	if (reg == DW_FRAME_UNDEFINED_VAL || reg == DW_FRAME_REG_INITIAL_VALUE)
		snprintf(rs, sizeof(rs), "%c", 'u');
	else if (reg == DW_FRAME_CFA_COL)
		snprintf(rs, sizeof(rs), "c%+jd", (intmax_t) off);
	else
		snprintf(rs, sizeof(rs), "%s%+jd", dwarf_regname(re, reg),
		    (intmax_t) off);

	return (rs);
}

static int
dump_dwarf_frame_regtable(struct readelf *re, Dwarf_Fde fde, Dwarf_Addr pc,
    Dwarf_Unsigned func_len, Dwarf_Half cie_ra)
{
	Dwarf_Regtable rt;
	Dwarf_Addr row_pc, end_pc, pre_pc, cur_pc;
	Dwarf_Error de;
	char *vec;
	int i;

#define BIT_SET(v, n) (v[(n)>>3] |= 1U << ((n) & 7))
#define BIT_CLR(v, n) (v[(n)>>3] &= ~(1U << ((n) & 7)))
#define BIT_ISSET(v, n) (v[(n)>>3] & (1U << ((n) & 7)))
#define	RT(x) rt.rules[(x)]

	vec = calloc((DW_REG_TABLE_SIZE + 7) / 8, 1);
	if (vec == NULL)
		err(EXIT_FAILURE, "calloc failed");

	pre_pc = ~((Dwarf_Addr) 0);
	cur_pc = pc;
	end_pc = pc + func_len;
	for (; cur_pc < end_pc; cur_pc++) {
		if (dwarf_get_fde_info_for_all_regs(fde, cur_pc, &rt, &row_pc,
		    &de) != DW_DLV_OK) {
			free(vec);
			warnx("dwarf_get_fde_info_for_all_regs failed: %s\n",
			    dwarf_errmsg(de));
			return (-1);
		}
		if (row_pc == pre_pc)
			continue;
		pre_pc = row_pc;
		for (i = 1; i < DW_REG_TABLE_SIZE; i++) {
			if (rt.rules[i].dw_regnum != DW_FRAME_REG_INITIAL_VALUE)
				BIT_SET(vec, i);
		}
	}

	printf("   LOC   CFA      ");
	for (i = 1; i < DW_REG_TABLE_SIZE; i++) {
		if (BIT_ISSET(vec, i)) {
			if ((Dwarf_Half) i == cie_ra)
				printf("ra   ");
			else
				printf("%-5s",
				    dwarf_regname(re, (unsigned int) i));
		}
	}
	putchar('\n');

	pre_pc = ~((Dwarf_Addr) 0);
	cur_pc = pc;
	end_pc = pc + func_len;
	for (; cur_pc < end_pc; cur_pc++) {
		if (dwarf_get_fde_info_for_all_regs(fde, cur_pc, &rt, &row_pc,
		    &de) != DW_DLV_OK) {
			free(vec);
			warnx("dwarf_get_fde_info_for_all_regs failed: %s\n",
			    dwarf_errmsg(de));
			return (-1);
		}
		if (row_pc == pre_pc)
			continue;
		pre_pc = row_pc;
		printf("%08jx ", (uintmax_t) row_pc);
		printf("%-8s ", get_regoff_str(re, RT(0).dw_regnum,
		    RT(0).dw_offset));
		for (i = 1; i < DW_REG_TABLE_SIZE; i++) {
			if (BIT_ISSET(vec, i)) {
				printf("%-5s", get_regoff_str(re,
				    RT(i).dw_regnum, RT(i).dw_offset));
			}
		}
		putchar('\n');
	}

	free(vec);

	return (0);

#undef	BIT_SET
#undef	BIT_CLR
#undef	BIT_ISSET
#undef	RT
}

static void
dump_dwarf_frame_section(struct readelf *re, struct section *s, int alt)
{
	Dwarf_Cie *cie_list, cie, pre_cie;
	Dwarf_Fde *fde_list, fde;
	Dwarf_Off cie_offset, fde_offset;
	Dwarf_Unsigned cie_length, fde_instlen;
	Dwarf_Unsigned cie_caf, cie_daf, cie_instlen, func_len, fde_length;
	Dwarf_Signed cie_count, fde_count, cie_index;
	Dwarf_Addr low_pc;
	Dwarf_Half cie_ra;
	Dwarf_Small cie_version;
	Dwarf_Ptr fde_addr, fde_inst, cie_inst;
	char *cie_aug, c;
	int i, ret, eh_frame;
	Dwarf_Error de;

	printf("\nThe section %s contains:\n\n", s->name);

	if (!strcmp(s->name, ".debug_frame")) {
		eh_frame = 0;
		if (dwarf_get_fde_list(re->dbg, &cie_list, &cie_count,
		    &fde_list, &fde_count, &de) != DW_DLV_OK) {
			warnx("dwarf_get_fde_list failed: %s",
			    dwarf_errmsg(de));
			return;
		}
	} else if (!strcmp(s->name, ".eh_frame")) {
		eh_frame = 1;
		ret = dwarf_get_fde_list_eh(re->dbg, &cie_list, &cie_count,
		    &fde_list, &fde_count, &de);
		if (ret != DW_DLV_OK) {
			if (ret == DW_DLV_ERROR) {
				warnx("dwarf_get_fde_list_eh failed: %s",
				    dwarf_errmsg(de));
			}
			return;
		}
	} else
		return;

	pre_cie = NULL;
	for (i = 0; i < fde_count; i++) {
		if (dwarf_get_fde_n(fde_list, i, &fde, &de) != DW_DLV_OK) {
			warnx("dwarf_get_fde_n failed: %s", dwarf_errmsg(de));
			continue;
		}
		if (dwarf_get_cie_of_fde(fde, &cie, &de) != DW_DLV_OK) {
			warnx("dwarf_get_fde_n failed: %s", dwarf_errmsg(de));
			continue;
		}
		if (dwarf_get_fde_range(fde, &low_pc, &func_len, &fde_addr,
		    &fde_length, &cie_offset, &cie_index, &fde_offset,
		    &de) != DW_DLV_OK) {
			warnx("dwarf_get_fde_range failed: %s",
			    dwarf_errmsg(de));
			continue;
		}
		if (dwarf_get_fde_instr_bytes(fde, &fde_inst, &fde_instlen,
		    &de) != DW_DLV_OK) {
			warnx("dwarf_get_fde_instr_bytes failed: %s",
			    dwarf_errmsg(de));
			continue;
		}
		if (pre_cie == NULL || cie != pre_cie) {
			pre_cie = cie;
			if (dwarf_get_cie_info(cie, &cie_length, &cie_version,
			    &cie_aug, &cie_caf, &cie_daf, &cie_ra,
			    &cie_inst, &cie_instlen, &de) != DW_DLV_OK) {
				warnx("dwarf_get_cie_info failed: %s",
				    dwarf_errmsg(de));
				continue;
			}
			printf("%08jx %08jx %8.8jx CIE",
			    (uintmax_t) cie_offset,
			    (uintmax_t) cie_length,
			    (uintmax_t) (eh_frame ? 0 : ~0U));
			if (!alt) {
				putchar('\n');
				printf("  Version:\t\t\t%u\n", cie_version);
				printf("  Augmentation:\t\t\t\"");
				while ((c = *cie_aug++) != '\0')
					putchar(c);
				printf("\"\n");
				printf("  Code alignment factor:\t%ju\n",
				    (uintmax_t) cie_caf);
				printf("  Data alignment factor:\t%jd\n",
				    (intmax_t) cie_daf);
				printf("  Return address column:\t%ju\n",
				    (uintmax_t) cie_ra);
				putchar('\n');
				dump_dwarf_frame_inst(re, cie, cie_inst,
				    cie_instlen, cie_caf, cie_daf, 0,
				    re->dbg);
				putchar('\n');
			} else {
				printf(" \"");
				while ((c = *cie_aug++) != '\0')
					putchar(c);
				putchar('"');
				printf(" cf=%ju df=%jd ra=%ju\n",
				    (uintmax_t) cie_caf,
				    (uintmax_t) cie_daf,
				    (uintmax_t) cie_ra);
				dump_dwarf_frame_regtable(re, fde, low_pc, 1,
				    cie_ra);
				putchar('\n');
			}
		}
		printf("%08jx %08jx %08jx FDE cie=%08jx pc=%08jx..%08jx\n",
		    (uintmax_t) fde_offset, (uintmax_t) fde_length,
		    (uintmax_t) cie_offset,
		    (uintmax_t) (eh_frame ? fde_offset + 4 - cie_offset :
			cie_offset),
		    (uintmax_t) low_pc, (uintmax_t) (low_pc + func_len));
		if (!alt)
			dump_dwarf_frame_inst(re, cie, fde_inst, fde_instlen,
			    cie_caf, cie_daf, low_pc, re->dbg);
		else
			dump_dwarf_frame_regtable(re, fde, low_pc, func_len,
			    cie_ra);
		putchar('\n');
	}
}

static void
dump_dwarf_frame(struct readelf *re, int alt)
{
	struct section *s;
	int i;

	(void) dwarf_set_frame_cfa_value(re->dbg, DW_FRAME_CFA_COL);

	for (i = 0; (size_t) i < re->shnum; i++) {
		s = &re->sl[i];
		if (s->name != NULL && (!strcmp(s->name, ".debug_frame") ||
		    !strcmp(s->name, ".eh_frame")))
			dump_dwarf_frame_section(re, s, alt);
	}
}

static void
dump_dwarf_str(struct readelf *re)
{
	struct section *s;
	Elf_Data *d;
	unsigned char *p;
	int elferr, end, i, j;

	printf("\nContents of section .debug_str:\n");

	s = NULL;
	for (i = 0; (size_t) i < re->shnum; i++) {
		s = &re->sl[i];
		if (s->name != NULL && !strcmp(s->name, ".debug_str"))
			break;
	}
	if ((size_t) i >= re->shnum)
		return;

	(void) elf_errno();
	if ((d = elf_getdata(s->scn, NULL)) == NULL) {
		elferr = elf_errno();
		if (elferr != 0)
			warnx("elf_getdata failed: %s", elf_errmsg(-1));
		return;
	}
	if (d->d_size <= 0)
		return;

	for (i = 0, p = d->d_buf; (size_t) i < d->d_size; i += 16) {
		printf("  0x%08x", (unsigned int) i);
		if ((size_t) i + 16 > d->d_size)
			end = d->d_size;
		else
			end = i + 16;
		for (j = i; j < i + 16; j++) {
			if ((j - i) % 4 == 0)
				putchar(' ');
			if (j >= end) {
				printf("  ");
				continue;
			}
			printf("%02x", (uint8_t) p[j]);
		}
		putchar(' ');
		for (j = i; j < end; j++) {
			if (isprint(p[j]))
				putchar(p[j]);
			else if (p[j] == 0)
				putchar('.');
			else
				putchar(' ');
		}
		putchar('\n');
	}
}

static int
loc_at_comparator(const void *la1, const void *la2)
{
	const struct loc_at *left, *right;

	left = (const struct loc_at *)la1;
	right = (const struct loc_at *)la2;

	if (left->la_off > right->la_off)
		return (1);
	else if (left->la_off < right->la_off)
		return (-1);
	else
		return (0);
}

static void
search_loclist_at(struct readelf *re, Dwarf_Die die, Dwarf_Unsigned lowpc,
    struct loc_at **la_list, size_t *la_list_len, size_t *la_list_cap)
{
	struct loc_at *la;
	Dwarf_Attribute *attr_list;
	Dwarf_Die ret_die;
	Dwarf_Unsigned off;
	Dwarf_Off ref;
	Dwarf_Signed attr_count;
	Dwarf_Half attr, form;
	Dwarf_Bool is_info;
	Dwarf_Error de;
	int i, ret;

	is_info = dwarf_get_die_infotypes_flag(die);

	if ((ret = dwarf_attrlist(die, &attr_list, &attr_count, &de)) !=
	    DW_DLV_OK) {
		if (ret == DW_DLV_ERROR)
			warnx("dwarf_attrlist failed: %s", dwarf_errmsg(de));
		goto cont_search;
	}
	for (i = 0; i < attr_count; i++) {
		if (dwarf_whatattr(attr_list[i], &attr, &de) != DW_DLV_OK) {
			warnx("dwarf_whatattr failed: %s", dwarf_errmsg(de));
			continue;
		}
		if (attr != DW_AT_location &&
		    attr != DW_AT_string_length &&
		    attr != DW_AT_return_addr &&
		    attr != DW_AT_data_member_location &&
		    attr != DW_AT_frame_base &&
		    attr != DW_AT_segment &&
		    attr != DW_AT_static_link &&
		    attr != DW_AT_use_location &&
		    attr != DW_AT_vtable_elem_location)
			continue;
		if (dwarf_whatform(attr_list[i], &form, &de) != DW_DLV_OK) {
			warnx("dwarf_whatform failed: %s", dwarf_errmsg(de));
			continue;
		}
		if (form == DW_FORM_data4 || form == DW_FORM_data8) {
			if (dwarf_formudata(attr_list[i], &off, &de) !=
			    DW_DLV_OK) {
				warnx("dwarf_formudata failed: %s",
				    dwarf_errmsg(de));
				continue;
			}
		} else if (form == DW_FORM_sec_offset) {
			if (dwarf_global_formref(attr_list[i], &ref, &de) !=
			    DW_DLV_OK) {
				warnx("dwarf_global_formref failed: %s",
				    dwarf_errmsg(de));
				continue;
			}
			off = ref;
		} else
			continue;

		if (*la_list_cap == *la_list_len) {
			*la_list = realloc(*la_list,
			    *la_list_cap * 2 * sizeof(**la_list));
			if (*la_list == NULL)
				err(EXIT_FAILURE, "realloc failed");
			*la_list_cap *= 2;
		}
		la = &((*la_list)[*la_list_len]);
		la->la_at = attr_list[i];
		la->la_off = off;
		la->la_lowpc = lowpc;
		la->la_cu_psize = re->cu_psize;
		la->la_cu_osize = re->cu_osize;
		la->la_cu_ver = re->cu_ver;
		(*la_list_len)++;
	}

cont_search:
	/* Search children. */
	ret = dwarf_child(die, &ret_die, &de);
	if (ret == DW_DLV_ERROR)
		warnx("dwarf_child: %s", dwarf_errmsg(de));
	else if (ret == DW_DLV_OK)
		search_loclist_at(re, ret_die, lowpc, la_list,
		    la_list_len, la_list_cap);

	/* Search sibling. */
	ret = dwarf_siblingof_b(re->dbg, die, &ret_die, is_info, &de);
	if (ret == DW_DLV_ERROR)
		warnx("dwarf_siblingof: %s", dwarf_errmsg(de));
	else if (ret == DW_DLV_OK)
		search_loclist_at(re, ret_die, lowpc, la_list,
		    la_list_len, la_list_cap);
}

static void
dump_dwarf_loc(struct readelf *re, Dwarf_Loc *lr)
{
	const char *op_str;
	char unk_op[32];
	uint8_t *b, n;
	int i;

	if (dwarf_get_OP_name(lr->lr_atom, &op_str) !=
	    DW_DLV_OK) {
		snprintf(unk_op, sizeof(unk_op),
		    "[Unknown OP: %#x]", lr->lr_atom);
		op_str = unk_op;
	}

	printf("%s", op_str);

	switch (lr->lr_atom) {
	case DW_OP_reg0:
	case DW_OP_reg1:
	case DW_OP_reg2:
	case DW_OP_reg3:
	case DW_OP_reg4:
	case DW_OP_reg5:
	case DW_OP_reg6:
	case DW_OP_reg7:
	case DW_OP_reg8:
	case DW_OP_reg9:
	case DW_OP_reg10:
	case DW_OP_reg11:
	case DW_OP_reg12:
	case DW_OP_reg13:
	case DW_OP_reg14:
	case DW_OP_reg15:
	case DW_OP_reg16:
	case DW_OP_reg17:
	case DW_OP_reg18:
	case DW_OP_reg19:
	case DW_OP_reg20:
	case DW_OP_reg21:
	case DW_OP_reg22:
	case DW_OP_reg23:
	case DW_OP_reg24:
	case DW_OP_reg25:
	case DW_OP_reg26:
	case DW_OP_reg27:
	case DW_OP_reg28:
	case DW_OP_reg29:
	case DW_OP_reg30:
	case DW_OP_reg31:
		printf(" (%s)", dwarf_regname(re, lr->lr_atom - DW_OP_reg0));
		break;

	case DW_OP_deref:
	case DW_OP_lit0:
	case DW_OP_lit1:
	case DW_OP_lit2:
	case DW_OP_lit3:
	case DW_OP_lit4:
	case DW_OP_lit5:
	case DW_OP_lit6:
	case DW_OP_lit7:
	case DW_OP_lit8:
	case DW_OP_lit9:
	case DW_OP_lit10:
	case DW_OP_lit11:
	case DW_OP_lit12:
	case DW_OP_lit13:
	case DW_OP_lit14:
	case DW_OP_lit15:
	case DW_OP_lit16:
	case DW_OP_lit17:
	case DW_OP_lit18:
	case DW_OP_lit19:
	case DW_OP_lit20:
	case DW_OP_lit21:
	case DW_OP_lit22:
	case DW_OP_lit23:
	case DW_OP_lit24:
	case DW_OP_lit25:
	case DW_OP_lit26:
	case DW_OP_lit27:
	case DW_OP_lit28:
	case DW_OP_lit29:
	case DW_OP_lit30:
	case DW_OP_lit31:
	case DW_OP_dup:
	case DW_OP_drop:
	case DW_OP_over:
	case DW_OP_swap:
	case DW_OP_rot:
	case DW_OP_xderef:
	case DW_OP_abs:
	case DW_OP_and:
	case DW_OP_div:
	case DW_OP_minus:
	case DW_OP_mod:
	case DW_OP_mul:
	case DW_OP_neg:
	case DW_OP_not:
	case DW_OP_or:
	case DW_OP_plus:
	case DW_OP_shl:
	case DW_OP_shr:
	case DW_OP_shra:
	case DW_OP_xor:
	case DW_OP_eq:
	case DW_OP_ge:
	case DW_OP_gt:
	case DW_OP_le:
	case DW_OP_lt:
	case DW_OP_ne:
	case DW_OP_nop:
	case DW_OP_push_object_address:
	case DW_OP_form_tls_address:
	case DW_OP_call_frame_cfa:
	case DW_OP_stack_value:
	case DW_OP_GNU_push_tls_address:
	case DW_OP_GNU_uninit:
		break;

	case DW_OP_const1u:
	case DW_OP_pick:
	case DW_OP_deref_size:
	case DW_OP_xderef_size:
	case DW_OP_const2u:
	case DW_OP_bra:
	case DW_OP_skip:
	case DW_OP_const4u:
	case DW_OP_const8u:
	case DW_OP_constu:
	case DW_OP_plus_uconst:
	case DW_OP_regx:
	case DW_OP_piece:
		printf(": %ju", (uintmax_t)
		    lr->lr_number);
		break;

	case DW_OP_const1s:
	case DW_OP_const2s:
	case DW_OP_const4s:
	case DW_OP_const8s:
	case DW_OP_consts:
		printf(": %jd", (intmax_t)
		    lr->lr_number);
		break;

	case DW_OP_breg0:
	case DW_OP_breg1:
	case DW_OP_breg2:
	case DW_OP_breg3:
	case DW_OP_breg4:
	case DW_OP_breg5:
	case DW_OP_breg6:
	case DW_OP_breg7:
	case DW_OP_breg8:
	case DW_OP_breg9:
	case DW_OP_breg10:
	case DW_OP_breg11:
	case DW_OP_breg12:
	case DW_OP_breg13:
	case DW_OP_breg14:
	case DW_OP_breg15:
	case DW_OP_breg16:
	case DW_OP_breg17:
	case DW_OP_breg18:
	case DW_OP_breg19:
	case DW_OP_breg20:
	case DW_OP_breg21:
	case DW_OP_breg22:
	case DW_OP_breg23:
	case DW_OP_breg24:
	case DW_OP_breg25:
	case DW_OP_breg26:
	case DW_OP_breg27:
	case DW_OP_breg28:
	case DW_OP_breg29:
	case DW_OP_breg30:
	case DW_OP_breg31:
		printf(" (%s): %jd",
		    dwarf_regname(re, lr->lr_atom - DW_OP_breg0),
		    (intmax_t) lr->lr_number);
		break;

	case DW_OP_fbreg:
		printf(": %jd", (intmax_t)
		    lr->lr_number);
		break;

	case DW_OP_bregx:
		printf(": %ju (%s) %jd",
		    (uintmax_t) lr->lr_number,
		    dwarf_regname(re, (unsigned int) lr->lr_number),
		    (intmax_t) lr->lr_number2);
		break;

	case DW_OP_addr:
	case DW_OP_GNU_encoded_addr:
		printf(": %#jx", (uintmax_t)
		    lr->lr_number);
		break;

	case DW_OP_GNU_implicit_pointer:
		printf(": <0x%jx> %jd", (uintmax_t) lr->lr_number,
		    (intmax_t) lr->lr_number2);
		break;

	case DW_OP_implicit_value:
		printf(": %ju byte block:", (uintmax_t) lr->lr_number);
		b = (uint8_t *)(uintptr_t) lr->lr_number2;
		for (i = 0; (Dwarf_Unsigned) i < lr->lr_number; i++)
			printf(" %x", b[i]);
		break;

	case DW_OP_GNU_entry_value:
		printf(": (");
		dump_dwarf_block(re, (uint8_t *)(uintptr_t) lr->lr_number2,
		    lr->lr_number);
		putchar(')');
		break;

	case DW_OP_GNU_const_type:
		printf(": <0x%jx> ", (uintmax_t) lr->lr_number);
		b = (uint8_t *)(uintptr_t) lr->lr_number2;
		n = *b;
		for (i = 1; (uint8_t) i < n; i++)
			printf(" %x", b[i]);
		break;

	case DW_OP_GNU_regval_type:
		printf(": %ju (%s) <0x%jx>", (uintmax_t) lr->lr_number,
		    dwarf_regname(re, (unsigned int) lr->lr_number),
		    (uintmax_t) lr->lr_number2);
		break;

	case DW_OP_GNU_convert:
	case DW_OP_GNU_deref_type:
	case DW_OP_GNU_parameter_ref:
	case DW_OP_GNU_reinterpret:
		printf(": <0x%jx>", (uintmax_t) lr->lr_number);
		break;

	default:
		break;
	}
}

static void
dump_dwarf_block(struct readelf *re, uint8_t *b, Dwarf_Unsigned len)
{
	Dwarf_Locdesc *llbuf;
	Dwarf_Signed lcnt;
	Dwarf_Error de;
	int i;

	if (dwarf_loclist_from_expr_b(re->dbg, b, len, re->cu_psize,
	    re->cu_osize, re->cu_ver, &llbuf, &lcnt, &de) != DW_DLV_OK) {
		warnx("dwarf_loclist_form_expr_b: %s", dwarf_errmsg(de));
		return;
	}

	for (i = 0; (Dwarf_Half) i < llbuf->ld_cents; i++) {
		dump_dwarf_loc(re, &llbuf->ld_s[i]);
		if (i < llbuf->ld_cents - 1)
			printf("; ");
	}

	dwarf_dealloc(re->dbg, llbuf->ld_s, DW_DLA_LOC_BLOCK);
	dwarf_dealloc(re->dbg, llbuf, DW_DLA_LOCDESC);
}

static void
dump_dwarf_loclist(struct readelf *re)
{
	Dwarf_Die die;
	Dwarf_Locdesc **llbuf;
	Dwarf_Unsigned lowpc;
	Dwarf_Signed lcnt;
	Dwarf_Half tag, version, pointer_size, off_size;
	Dwarf_Error de;
	struct loc_at *la_list, *left, *right, *la;
	size_t la_list_len, la_list_cap;
	unsigned int duplicates, k;
	int i, j, ret, has_content;

	la_list_len = 0;
	la_list_cap = 200;
	if ((la_list = calloc(la_list_cap, sizeof(struct loc_at))) == NULL)
		errx(EXIT_FAILURE, "calloc failed");
	/* Search .debug_info section. */
	while ((ret = dwarf_next_cu_header_b(re->dbg, NULL, &version, NULL,
	    &pointer_size, &off_size, NULL, NULL, &de)) == DW_DLV_OK) {
		set_cu_context(re, pointer_size, off_size, version);
		die = NULL;
		if (dwarf_siblingof(re->dbg, die, &die, &de) != DW_DLV_OK)
			continue;
		if (dwarf_tag(die, &tag, &de) != DW_DLV_OK) {
			warnx("dwarf_tag failed: %s", dwarf_errmsg(de));
			continue;
		}
		/* XXX: What about DW_TAG_partial_unit? */
		lowpc = 0;
		if (tag == DW_TAG_compile_unit) {
			if (dwarf_attrval_unsigned(die, DW_AT_low_pc,
			    &lowpc, &de) != DW_DLV_OK)
				lowpc = 0;
		}

		/* Search attributes for reference to .debug_loc section. */
		search_loclist_at(re, die, lowpc, &la_list,
		    &la_list_len, &la_list_cap);
	}
	if (ret == DW_DLV_ERROR)
		warnx("dwarf_next_cu_header: %s", dwarf_errmsg(de));

	/* Search .debug_types section. */
	do {
		while ((ret = dwarf_next_cu_header_c(re->dbg, 0, NULL,
		    &version, NULL, &pointer_size, &off_size, NULL, NULL,
		    NULL, NULL, &de)) == DW_DLV_OK) {
			set_cu_context(re, pointer_size, off_size, version);
			die = NULL;
			if (dwarf_siblingof(re->dbg, die, &die, &de) !=
			    DW_DLV_OK)
				continue;
			if (dwarf_tag(die, &tag, &de) != DW_DLV_OK) {
				warnx("dwarf_tag failed: %s",
				    dwarf_errmsg(de));
				continue;
			}

			lowpc = 0;
			if (tag == DW_TAG_type_unit) {
				if (dwarf_attrval_unsigned(die, DW_AT_low_pc,
				    &lowpc, &de) != DW_DLV_OK)
					lowpc = 0;
			}

			/*
			 * Search attributes for reference to .debug_loc
			 * section.
			 */
			search_loclist_at(re, die, lowpc, &la_list,
			    &la_list_len, &la_list_cap);
		}
		if (ret == DW_DLV_ERROR)
			warnx("dwarf_next_cu_header: %s", dwarf_errmsg(de));
	} while (dwarf_next_types_section(re->dbg, &de) == DW_DLV_OK);

	if (la_list_len == 0) {
		free(la_list);
		return;
	}

	/* Sort la_list using loc_at_comparator. */
	qsort(la_list, la_list_len, sizeof(struct loc_at), loc_at_comparator);

	/* Get rid of the duplicates in la_list. */
	duplicates = 0;
	for (k = 1; k < la_list_len; ++k) {
		left = &la_list[k - 1 - duplicates];
		right = &la_list[k];

		if (left->la_off == right->la_off)
			duplicates++;
		else
			la_list[k - duplicates] = *right;
	}
	la_list_len -= duplicates;

	has_content = 0;
	for (k = 0; k < la_list_len; ++k) {
		la = &la_list[k];
		if ((ret = dwarf_loclist_n(la->la_at, &llbuf, &lcnt, &de)) !=
		    DW_DLV_OK) {
			if (ret != DW_DLV_NO_ENTRY)
				warnx("dwarf_loclist_n failed: %s",
				    dwarf_errmsg(de));
			continue;
		}
		if (!has_content) {
			has_content = 1;
			printf("\nContents of section .debug_loc:\n");
			printf("    Offset   Begin    End      Expression\n");
		}
		set_cu_context(re, la->la_cu_psize, la->la_cu_osize,
		    la->la_cu_ver);
		for (i = 0; i < lcnt; i++) {
			printf("    %8.8jx ", (uintmax_t) la->la_off);
			if (llbuf[i]->ld_lopc == 0 && llbuf[i]->ld_hipc == 0) {
				printf("<End of list>\n");
				continue;
			}

			/* TODO: handle base selection entry. */

			printf("%8.8jx %8.8jx ",
			    (uintmax_t) (la->la_lowpc + llbuf[i]->ld_lopc),
			    (uintmax_t) (la->la_lowpc + llbuf[i]->ld_hipc));

			putchar('(');
			for (j = 0; (Dwarf_Half) j < llbuf[i]->ld_cents; j++) {
				dump_dwarf_loc(re, &llbuf[i]->ld_s[j]);
				if (j < llbuf[i]->ld_cents - 1)
					printf("; ");
			}
			putchar(')');

			if (llbuf[i]->ld_lopc == llbuf[i]->ld_hipc)
				printf(" (start == end)");
			putchar('\n');
		}
		for (i = 0; i < lcnt; i++) {
			dwarf_dealloc(re->dbg, llbuf[i]->ld_s,
			    DW_DLA_LOC_BLOCK);
			dwarf_dealloc(re->dbg, llbuf[i], DW_DLA_LOCDESC);
		}
		dwarf_dealloc(re->dbg, llbuf, DW_DLA_LIST);
	}

	if (!has_content)
		printf("\nSection '.debug_loc' has no debugging data.\n");

	free(la_list);
}

/*
 * Retrieve a string using string table section index and the string offset.
 */
static const char*
get_string(struct readelf *re, int strtab, size_t off)
{
	const char *name;

	if ((name = elf_strptr(re->elf, strtab, off)) == NULL)
		return ("");

	return (name);
}

/*
 * Retrieve the name of a symbol using the section index of the symbol
 * table and the index of the symbol within that table.
 */
static const char *
get_symbol_name(struct readelf *re, int symtab, int i)
{
	struct section	*s;
	const char	*name;
	GElf_Sym	 sym;
	Elf_Data	*data;
	int		 elferr;

	s = &re->sl[symtab];
	if (s->type != SHT_SYMTAB && s->type != SHT_DYNSYM)
		return ("");
	(void) elf_errno();
	if ((data = elf_getdata(s->scn, NULL)) == NULL) {
		elferr = elf_errno();
		if (elferr != 0)
			warnx("elf_getdata failed: %s", elf_errmsg(elferr));
		return ("");
	}
	if (gelf_getsym(data, i, &sym) != &sym)
		return ("");
	/* Return section name for STT_SECTION symbol. */
	if (GELF_ST_TYPE(sym.st_info) == STT_SECTION) {
		if (sym.st_shndx < re->shnum &&
		    re->sl[sym.st_shndx].name != NULL)
			return (re->sl[sym.st_shndx].name);
		return ("");
	}
	if (s->link >= re->shnum ||
	    (name = elf_strptr(re->elf, s->link, sym.st_name)) == NULL)
		return ("");

	return (name);
}

static uint64_t
get_symbol_value(struct readelf *re, int symtab, int i)
{
	struct section	*s;
	GElf_Sym	 sym;
	Elf_Data	*data;
	int		 elferr;

	s = &re->sl[symtab];
	if (s->type != SHT_SYMTAB && s->type != SHT_DYNSYM)
		return (0);
	(void) elf_errno();
	if ((data = elf_getdata(s->scn, NULL)) == NULL) {
		elferr = elf_errno();
		if (elferr != 0)
			warnx("elf_getdata failed: %s", elf_errmsg(elferr));
		return (0);
	}
	if (gelf_getsym(data, i, &sym) != &sym)
		return (0);

	return (sym.st_value);
}

/*
 * Decompress a data section if needed (using ZLIB).
 * Returns true if sucessful, false otherwise.
 */
static bool decompress_section(struct section *s,
    unsigned char *compressed_data_buffer, size_t compressed_size,
    unsigned char **ret_buf, size_t *ret_sz)
{
	GElf_Shdr sh;

	if (gelf_getshdr(s->scn, &sh) == NULL)
		errx(EXIT_FAILURE, "gelf_getshdr() failed: %s", elf_errmsg(-1));

	if (sh.sh_flags & SHF_COMPRESSED) {
		int ret;
		GElf_Chdr chdr;
		Elf64_Xword inflated_size;
		unsigned char *uncompressed_data_buffer = NULL;
		Elf64_Xword uncompressed_size;
		z_stream strm;

		if (gelf_getchdr(s->scn, &chdr) == NULL)
			errx(EXIT_FAILURE, "gelf_getchdr() failed: %s", elf_errmsg(-1));
		if (chdr.ch_type != ELFCOMPRESS_ZLIB) {
			warnx("unknown compression type: %d", chdr.ch_type);
			return (false);
		}

		inflated_size = 0;
		uncompressed_size = chdr.ch_size;
		uncompressed_data_buffer = malloc(uncompressed_size);
		compressed_data_buffer += sizeof(chdr);
		compressed_size -= sizeof(chdr);

		strm.zalloc = Z_NULL;
		strm.zfree = Z_NULL;
		strm.opaque = Z_NULL;
		strm.avail_in = compressed_size;
		strm.avail_out = uncompressed_size;
		ret = inflateInit(&strm);

		if (ret != Z_OK)
			goto fail;
		/*
		 * The section can contain several compressed buffers,
		 * so decompress in a loop until all data is inflated.
		 */
		while (inflated_size < compressed_size) {
			strm.next_in = compressed_data_buffer + inflated_size;
			strm.next_out = uncompressed_data_buffer + inflated_size;
			ret = inflate(&strm, Z_FINISH);
			if (ret != Z_STREAM_END)
				goto fail;
			inflated_size = uncompressed_size - strm.avail_out;
			ret = inflateReset(&strm);
			if (ret != Z_OK)
				goto fail;
		}
		if (strm.avail_out != 0)
			warnx("Warning: wrong info in compression header.");
		ret = inflateEnd(&strm);
		if (ret != Z_OK)
			goto fail;
		*ret_buf = uncompressed_data_buffer;
		*ret_sz = uncompressed_size;
		return (true);
fail:
		inflateEnd(&strm);
		if (strm.msg)
			warnx("%s", strm.msg);
		else
			warnx("ZLIB error: %d", ret);
		free(uncompressed_data_buffer);
		return (false);
	}
	return (false);
}

static void
hex_dump(struct readelf *re)
{
	struct section *s;
	Elf_Data *d;
	uint8_t *buf, *new_buf;
	size_t sz, nbytes;
	uint64_t addr;
	int elferr, i, j;

	for (i = 1; (size_t) i < re->shnum; i++) {
		new_buf = NULL;
		s = &re->sl[i];
		if (find_dumpop(re, (size_t) i, s->name, HEX_DUMP, -1) == NULL)
			continue;
		(void) elf_errno();
		if ((d = elf_getdata(s->scn, NULL)) == NULL &&
		    (d = elf_rawdata(s->scn, NULL)) == NULL) {
			elferr = elf_errno();
			if (elferr != 0)
				warnx("elf_getdata failed: %s",
				    elf_errmsg(elferr));
			continue;
		}
		(void) elf_errno();
		if (d->d_size <= 0 || d->d_buf == NULL) {
			printf("\nSection '%s' has no data to dump.\n",
			    s->name);
			continue;
		}
		buf = d->d_buf;
		sz = d->d_size;
		addr = s->addr;
		if (re->options & RE_Z) {
			if (decompress_section(s, d->d_buf, d->d_size,
			    &new_buf, &sz))
				buf = new_buf;
		}
		printf("\nHex dump of section '%s':\n", s->name);
		while (sz > 0) {
			printf("  0x%8.8jx ", (uintmax_t)addr);
			nbytes = sz > 16? 16 : sz;
			for (j = 0; j < 16; j++) {
				if ((size_t)j < nbytes)
					printf("%2.2x", buf[j]);
				else
					printf("  ");
				if ((j & 3) == 3)
					printf(" ");
			}
			for (j = 0; (size_t)j < nbytes; j++) {
				if (isprint(buf[j]))
					printf("%c", buf[j]);
				else
					printf(".");
			}
			printf("\n");
			buf += nbytes;
			addr += nbytes;
			sz -= nbytes;
		}
		free(new_buf);
	}
}

static void
str_dump(struct readelf *re)
{
	struct section *s;
	Elf_Data *d;
	unsigned char *start, *end, *buf_end, *new_buf;
	unsigned int len;
	size_t sz;
	int i, j, elferr, found;

	for (i = 1; (size_t) i < re->shnum; i++) {
		new_buf = NULL;
		s = &re->sl[i];
		if (find_dumpop(re, (size_t) i, s->name, STR_DUMP, -1) == NULL)
			continue;
		(void) elf_errno();
		if ((d = elf_getdata(s->scn, NULL)) == NULL &&
		    (d = elf_rawdata(s->scn, NULL)) == NULL) {
			elferr = elf_errno();
			if (elferr != 0)
				warnx("elf_getdata failed: %s",
				    elf_errmsg(elferr));
			continue;
		}
		(void) elf_errno();
		if (d->d_size <= 0 || d->d_buf == NULL) {
			printf("\nSection '%s' has no data to dump.\n",
			    s->name);
			continue;
		}
		found = 0;
		start = d->d_buf;
		sz = d->d_size;
		if (re->options & RE_Z) {
			if (decompress_section(s, d->d_buf, d->d_size,
			    &new_buf, &sz))
				start = new_buf;
		}
		buf_end = start + sz;
		printf("\nString dump of section '%s':\n", s->name);
		for (;;) {
			while (start < buf_end && !isprint(*start))
				start++;
			if (start >= buf_end)
				break;
			end = start + 1;
			while (end < buf_end && isprint(*end))
				end++;
			printf("  [%6lx]  ",
			    (long) (start - (unsigned char *) d->d_buf));
			len = end - start;
			for (j = 0; (unsigned int) j < len; j++)
				putchar(start[j]);
			putchar('\n');
			found = 1;
			if (end >= buf_end)
				break;
			start = end + 1;
		}
		free(new_buf);
		if (!found)
			printf("  No strings found in this section.");
		putchar('\n');
	}
}

static void
load_sections(struct readelf *re)
{
	struct section	*s;
	const char	*name;
	Elf_Scn		*scn;
	GElf_Shdr	 sh;
	size_t		 shstrndx, ndx;
	int		 elferr;

	/* Allocate storage for internal section list. */
	if (!elf_getshnum(re->elf, &re->shnum)) {
		warnx("elf_getshnum failed: %s", elf_errmsg(-1));
		return;
	}
	if (re->sl != NULL)
		free(re->sl);
	if ((re->sl = calloc(re->shnum, sizeof(*re->sl))) == NULL)
		err(EXIT_FAILURE, "calloc failed");

	/* Get the index of .shstrtab section. */
	if (!elf_getshstrndx(re->elf, &shstrndx)) {
		warnx("elf_getshstrndx failed: %s", elf_errmsg(-1));
		return;
	}

	if ((scn = elf_getscn(re->elf, 0)) == NULL)
		return;

	(void) elf_errno();
	do {
		if (gelf_getshdr(scn, &sh) == NULL) {
			warnx("gelf_getshdr failed: %s", elf_errmsg(-1));
			(void) elf_errno();
			continue;
		}
		if ((name = elf_strptr(re->elf, shstrndx, sh.sh_name)) == NULL) {
			(void) elf_errno();
			name = "<no-name>";
		}
		if ((ndx = elf_ndxscn(scn)) == SHN_UNDEF) {
			if ((elferr = elf_errno()) != 0) {
				warnx("elf_ndxscn failed: %s",
				    elf_errmsg(elferr));
				continue;
			}
		}
		if (ndx >= re->shnum) {
			warnx("section index of '%s' out of range", name);
			continue;
		}
		if (sh.sh_link >= re->shnum)
			warnx("section link %llu of '%s' out of range",
			    (unsigned long long)sh.sh_link, name);
		s = &re->sl[ndx];
		s->name = name;
		s->scn = scn;
		s->off = sh.sh_offset;
		s->sz = sh.sh_size;
		s->entsize = sh.sh_entsize;
		s->align = sh.sh_addralign;
		s->type = sh.sh_type;
		s->flags = sh.sh_flags;
		s->addr = sh.sh_addr;
		s->link = sh.sh_link;
		s->info = sh.sh_info;
	} while ((scn = elf_nextscn(re->elf, scn)) != NULL);
	elferr = elf_errno();
	if (elferr != 0)
		warnx("elf_nextscn failed: %s", elf_errmsg(elferr));
}

static void
unload_sections(struct readelf *re)
{

	if (re->sl != NULL) {
		free(re->sl);
		re->sl = NULL;
	}
	re->shnum = 0;
	re->vd_s = NULL;
	re->vn_s = NULL;
	re->vs_s = NULL;
	re->vs = NULL;
	re->vs_sz = 0;
	if (re->ver != NULL) {
		free(re->ver);
		re->ver = NULL;
		re->ver_sz = 0;
	}
}

static bool
dump_elf(struct readelf *re)
{

	/* Fetch ELF header. No need to continue if it fails. */
	if (gelf_getehdr(re->elf, &re->ehdr) == NULL) {
		warnx("gelf_getehdr failed: %s", elf_errmsg(-1));
		return (false);
	}
	if ((re->ec = gelf_getclass(re->elf)) == ELFCLASSNONE) {
		warnx("gelf_getclass failed: %s", elf_errmsg(-1));
		return (false);
	}
	if (re->ehdr.e_ident[EI_DATA] == ELFDATA2MSB) {
		re->dw_read = _read_msb;
		re->dw_decode = _decode_msb;
	} else {
		re->dw_read = _read_lsb;
		re->dw_decode = _decode_lsb;
	}

	if (re->options & ~RE_H)
		load_sections(re);
	if ((re->options & RE_VV) || (re->options & RE_S))
		search_ver(re);
	if (re->options & RE_H)
		dump_ehdr(re);
	if (re->options & RE_L)
		dump_phdr(re);
	if (re->options & RE_SS)
		dump_shdr(re);
	if (re->options & RE_G)
		dump_section_groups(re);
	if (re->options & RE_D)
		dump_dynamic(re);
	if (re->options & RE_R)
		dump_reloc(re);
	if (re->options & RE_S)
		dump_symtabs(re);
	if (re->options & RE_N)
		dump_notes(re);
	if (re->options & RE_II)
		dump_hash(re);
	if (re->options & RE_X)
		hex_dump(re);
	if (re->options & RE_P)
		str_dump(re);
	if (re->options & RE_VV)
		dump_ver(re);
	if (re->options & RE_AA)
		dump_arch_specific_info(re);
	if (re->options & RE_W)
		dump_dwarf(re);
	if (re->options & ~RE_H)
		unload_sections(re);
	return (true);
}

static void
dump_dwarf(struct readelf *re)
{
	Dwarf_Error de;
	int error;

	if (dwarf_elf_init(re->elf, DW_DLC_READ, NULL, NULL, &re->dbg, &de)) {
		if ((error = dwarf_errno(de)) != DW_DLE_DEBUG_INFO_NULL)
			errx(EXIT_FAILURE, "dwarf_elf_init failed: %s",
			    dwarf_errmsg(de));
		return;
	}

	if (re->dop & DW_A)
		dump_dwarf_abbrev(re);
	if (re->dop & DW_L)
		dump_dwarf_line(re);
	if (re->dop & DW_LL)
		dump_dwarf_line_decoded(re);
	if (re->dop & DW_I) {
		dump_dwarf_info(re, 0);
		dump_dwarf_info(re, 1);
	}
	if (re->dop & DW_P)
		dump_dwarf_pubnames(re);
	if (re->dop & DW_R)
		dump_dwarf_aranges(re);
	if (re->dop & DW_RR)
		dump_dwarf_ranges(re);
	if (re->dop & DW_M)
		dump_dwarf_macinfo(re);
	if (re->dop & DW_F)
		dump_dwarf_frame(re, 0);
	else if (re->dop & DW_FF)
		dump_dwarf_frame(re, 1);
	if (re->dop & DW_S)
		dump_dwarf_str(re);
	if (re->dop & DW_O)
		dump_dwarf_loclist(re);

	dwarf_finish(re->dbg, &de);
}

static bool
dump_ar(struct readelf *re, int fd)
{
	Elf_Arsym *arsym;
	Elf_Arhdr *arhdr;
	Elf_Cmd cmd;
	Elf *e;
	size_t sz;
	off_t off;
	int i;

	re->ar = re->elf;

	if (re->options & RE_C) {
		if ((arsym = elf_getarsym(re->ar, &sz)) == NULL) {
			warnx("elf_getarsym() failed: %s", elf_errmsg(-1));
			goto process_members;
		}
		printf("Index of archive %s: (%ju entries)\n", re->filename,
		    (uintmax_t) sz - 1);
		off = 0;
		for (i = 0; (size_t) i < sz; i++) {
			if (arsym[i].as_name == NULL)
				break;
			if (arsym[i].as_off != off) {
				off = arsym[i].as_off;
				if (elf_rand(re->ar, off) != off) {
					warnx("elf_rand() failed: %s",
					    elf_errmsg(-1));
					continue;
				}
				if ((e = elf_begin(fd, ELF_C_READ, re->ar)) ==
				    NULL) {
					warnx("elf_begin() failed: %s",
					    elf_errmsg(-1));
					continue;
				}
				if ((arhdr = elf_getarhdr(e)) == NULL) {
					warnx("elf_getarhdr() failed: %s",
					    elf_errmsg(-1));
					elf_end(e);
					continue;
				}
				printf("Binary %s(%s) contains:\n",
				    re->filename, arhdr->ar_name);
				elf_end(e);
			}
			printf("\t%s\n", arsym[i].as_name);
		}
		if (elf_rand(re->ar, SARMAG) != SARMAG) {
			warnx("elf_rand() failed: %s", elf_errmsg(-1));
			return (false);
		}
	}

process_members:

	if ((re->options & ~RE_C) == 0)
		return (true);

	cmd = ELF_C_READ;
	while ((re->elf = elf_begin(fd, cmd, re->ar)) != NULL) {
		if ((arhdr = elf_getarhdr(re->elf)) == NULL) {
			warnx("elf_getarhdr() failed: %s", elf_errmsg(-1));
			goto next_member;
		}
		if (strcmp(arhdr->ar_name, "/") == 0 ||
		    strcmp(arhdr->ar_name, "//") == 0 ||
		    strcmp(arhdr->ar_name, "__.SYMDEF") == 0)
			goto next_member;
		printf("\nFile: %s(%s)\n", re->filename, arhdr->ar_name);
		dump_elf(re);

	next_member:
		cmd = elf_next(re->elf);
		elf_end(re->elf);
	}
	re->elf = re->ar;
	return (true);
}

static bool
dump_object(struct readelf *re, int fd)
{
	bool rv = false;

	if ((re->flags & DISPLAY_FILENAME) != 0)
		printf("\nFile: %s\n", re->filename);

	if ((re->elf = elf_begin(fd, ELF_C_READ, NULL)) == NULL) {
		warnx("elf_begin() failed: %s", elf_errmsg(-1));
		goto done;
	}

	switch (elf_kind(re->elf)) {
	case ELF_K_NONE:
		warnx("Not an ELF file.");
		goto done;
	case ELF_K_ELF:
		rv = dump_elf(re);
		break;
	case ELF_K_AR:
		rv = dump_ar(re, fd);
		break;
	default:
		warnx("Internal: libelf returned unknown elf kind.");
	}

done:
	elf_end(re->elf);
	return (rv);
}

static void
add_dumpop(struct readelf *re, size_t si, const char *sn, int op, int t)
{
	struct dumpop *d;

	if ((d = find_dumpop(re, si, sn, -1, t)) == NULL) {
		if ((d = calloc(1, sizeof(*d))) == NULL)
			err(EXIT_FAILURE, "calloc failed");
		if (t == DUMP_BY_INDEX)
			d->u.si = si;
		else
			d->u.sn = sn;
		d->type = t;
		d->op = op;
		STAILQ_INSERT_TAIL(&re->v_dumpop, d, dumpop_list);
	} else
		d->op |= op;
}

static struct dumpop *
find_dumpop(struct readelf *re, size_t si, const char *sn, int op, int t)
{
	struct dumpop *d;

	STAILQ_FOREACH(d, &re->v_dumpop, dumpop_list) {
		if ((op == -1 || op & d->op) &&
		    (t == -1 || (unsigned) t == d->type)) {
			if ((d->type == DUMP_BY_INDEX && d->u.si == si) ||
			    (d->type == DUMP_BY_NAME && !strcmp(d->u.sn, sn)))
				return (d);
		}
	}

	return (NULL);
}

static struct {
	const char *ln;
	char sn;
	int value;
} dwarf_op[] = {
	{"rawline", 'l', DW_L},
	{"decodedline", 'L', DW_LL},
	{"info", 'i', DW_I},
	{"abbrev", 'a', DW_A},
	{"pubnames", 'p', DW_P},
	{"aranges", 'r', DW_R},
	{"ranges", 'r', DW_R},
	{"Ranges", 'R', DW_RR},
	{"macro", 'm', DW_M},
	{"frames", 'f', DW_F},
	{"frames-interp", 'F', DW_FF},
	{"str", 's', DW_S},
	{"loc", 'o', DW_O},
	{NULL, 0, 0}
};

static void
parse_dwarf_op_short(struct readelf *re, const char *op)
{
	int i;

	if (op == NULL) {
		re->dop |= DW_DEFAULT_OPTIONS;
		return;
	}

	for (; *op != '\0'; op++) {
		for (i = 0; dwarf_op[i].ln != NULL; i++) {
			if (dwarf_op[i].sn == *op) {
				re->dop |= dwarf_op[i].value;
				break;
			}
		}
	}
}

static void
parse_dwarf_op_long(struct readelf *re, const char *op)
{
	char *p, *token, *bp;
	int i;

	if (op == NULL) {
		re->dop |= DW_DEFAULT_OPTIONS;
		return;
	}

	if ((p = strdup(op)) == NULL)
		err(EXIT_FAILURE, "strdup failed");
	bp = p;

	while ((token = strsep(&p, ",")) != NULL) {
		for (i = 0; dwarf_op[i].ln != NULL; i++) {
			if (!strcmp(token, dwarf_op[i].ln)) {
				re->dop |= dwarf_op[i].value;
				break;
			}
		}
	}

	free(bp);
}

static uint64_t
_read_lsb(Elf_Data *d, uint64_t *offsetp, int bytes_to_read)
{
	uint64_t ret;
	uint8_t *src;

	src = (uint8_t *) d->d_buf + *offsetp;

	ret = 0;
	switch (bytes_to_read) {
	case 8:
		ret |= ((uint64_t) src[4]) << 32 | ((uint64_t) src[5]) << 40;
		ret |= ((uint64_t) src[6]) << 48 | ((uint64_t) src[7]) << 56;
		/* FALLTHROUGH */
	case 4:
		ret |= ((uint64_t) src[2]) << 16 | ((uint64_t) src[3]) << 24;
		/* FALLTHROUGH */
	case 2:
		ret |= ((uint64_t) src[1]) << 8;
		/* FALLTHROUGH */
	case 1:
		ret |= src[0];
		break;
	default:
		return (0);
	}

	*offsetp += bytes_to_read;

	return (ret);
}

static uint64_t
_read_msb(Elf_Data *d, uint64_t *offsetp, int bytes_to_read)
{
	uint64_t ret;
	uint8_t *src;

	src = (uint8_t *) d->d_buf + *offsetp;

	switch (bytes_to_read) {
	case 1:
		ret = src[0];
		break;
	case 2:
		ret = src[1] | ((uint64_t) src[0]) << 8;
		break;
	case 4:
		ret = src[3] | ((uint64_t) src[2]) << 8;
		ret |= ((uint64_t) src[1]) << 16 | ((uint64_t) src[0]) << 24;
		break;
	case 8:
		ret = src[7] | ((uint64_t) src[6]) << 8;
		ret |= ((uint64_t) src[5]) << 16 | ((uint64_t) src[4]) << 24;
		ret |= ((uint64_t) src[3]) << 32 | ((uint64_t) src[2]) << 40;
		ret |= ((uint64_t) src[1]) << 48 | ((uint64_t) src[0]) << 56;
		break;
	default:
		return (0);
	}

	*offsetp += bytes_to_read;

	return (ret);
}

static uint64_t
_decode_lsb(uint8_t **data, int bytes_to_read)
{
	uint64_t ret;
	uint8_t *src;

	src = *data;

	ret = 0;
	switch (bytes_to_read) {
	case 8:
		ret |= ((uint64_t) src[4]) << 32 | ((uint64_t) src[5]) << 40;
		ret |= ((uint64_t) src[6]) << 48 | ((uint64_t) src[7]) << 56;
		/* FALLTHROUGH */
	case 4:
		ret |= ((uint64_t) src[2]) << 16 | ((uint64_t) src[3]) << 24;
		/* FALLTHROUGH */
	case 2:
		ret |= ((uint64_t) src[1]) << 8;
		/* FALLTHROUGH */
	case 1:
		ret |= src[0];
		break;
	default:
		return (0);
	}

	*data += bytes_to_read;

	return (ret);
}

static uint64_t
_decode_msb(uint8_t **data, int bytes_to_read)
{
	uint64_t ret;
	uint8_t *src;

	src = *data;

	ret = 0;
	switch (bytes_to_read) {
	case 1:
		ret = src[0];
		break;
	case 2:
		ret = src[1] | ((uint64_t) src[0]) << 8;
		break;
	case 4:
		ret = src[3] | ((uint64_t) src[2]) << 8;
		ret |= ((uint64_t) src[1]) << 16 | ((uint64_t) src[0]) << 24;
		break;
	case 8:
		ret = src[7] | ((uint64_t) src[6]) << 8;
		ret |= ((uint64_t) src[5]) << 16 | ((uint64_t) src[4]) << 24;
		ret |= ((uint64_t) src[3]) << 32 | ((uint64_t) src[2]) << 40;
		ret |= ((uint64_t) src[1]) << 48 | ((uint64_t) src[0]) << 56;
		break;
	default:
		return (0);
		break;
	}

	*data += bytes_to_read;

	return (ret);
}

static int64_t
_decode_sleb128(uint8_t **dp, uint8_t *dpe)
{
	int64_t ret = 0;
	uint8_t b = 0;
	int shift = 0;

	uint8_t *src = *dp;

	do {
		if (src >= dpe)
			break;
		b = *src++;
		ret |= ((b & 0x7f) << shift);
		shift += 7;
	} while ((b & 0x80) != 0);

	if (shift < 32 && (b & 0x40) != 0)
		ret |= (-1 << shift);

	*dp = src;

	return (ret);
}

static uint64_t
_decode_uleb128(uint8_t **dp, uint8_t *dpe)
{
	uint64_t ret = 0;
	uint8_t b;
	int shift = 0;

	uint8_t *src = *dp;

	do {
		if (src >= dpe)
			break;
		b = *src++;
		ret |= ((b & 0x7f) << shift);
		shift += 7;
	} while ((b & 0x80) != 0);

	*dp = src;

	return (ret);
}

static void
readelf_version(void)
{
	(void) printf("%s (%s)\n", ELFTC_GETPROGNAME(),
	    elftc_version());
	exit(EXIT_SUCCESS);
}

#define	USAGE_MESSAGE	"\
Usage: %s [options] file...\n\
  Display information about ELF objects and ar(1) archives.\n\n\
  Options:\n\
  -a | --all               Equivalent to specifying options '-dhIlrsASV'.\n\
  -c | --archive-index     Print the archive symbol table for archives.\n\
  -d | --dynamic           Print the contents of SHT_DYNAMIC sections.\n\
  -e | --headers           Print all headers in the object.\n\
  -g | --section-groups    Print the contents of the section groups.\n\
  -h | --file-header       Print the file header for the object.\n\
  -l | --program-headers   Print the PHDR table for the object.\n\
  -n | --notes             Print the contents of SHT_NOTE sections.\n\
  -p INDEX | --string-dump=INDEX\n\
                           Print the contents of section at index INDEX.\n\
  -r | --relocs            Print relocation information.\n\
  -s | --syms | --symbols  Print symbol tables.\n\
  -t | --section-details   Print additional information about sections.\n\
  -v | --version           Print a version identifier and exit.\n\
  -w[afilmoprsFLR] | --debug-dump={abbrev,aranges,decodedline,frames,\n\
                               frames-interp,info,loc,macro,pubnames,\n\
                               ranges,Ranges,rawline,str}\n\
                           Display DWARF information.\n\
  -x INDEX | --hex-dump=INDEX\n\
                           Display contents of a section as hexadecimal.\n\
  -z | --decompress        Decompress the contents of a section before displaying it.\n\
  -A | --arch-specific     (accepted, but ignored)\n\
  -D | --use-dynamic       Print the symbol table specified by the DT_SYMTAB\n\
                           entry in the \".dynamic\" section.\n\
  -H | --help              Print a help message.\n\
  -I | --histogram         Print information on bucket list lengths for \n\
                           hash sections.\n\
  -N | --full-section-name (accepted, but ignored)\n\
  -S | --sections | --section-headers\n\
                           Print information about section headers.\n\
  -V | --version-info      Print symbol versoning information.\n\
  -W | --wide              Print information without wrapping long lines.\n"


static void
readelf_usage(int status)
{
	fprintf(stderr, USAGE_MESSAGE, ELFTC_GETPROGNAME());
	exit(status);
}

int
main(int argc, char **argv)
{
	cap_rights_t	rights;
	fileargs_t	*fa;
	struct readelf	*re, re_storage;
	unsigned long	 si;
	int		 fd, opt, i, exit_code;
	char		*ep;

	re = &re_storage;
	memset(re, 0, sizeof(*re));
	STAILQ_INIT(&re->v_dumpop);

	while ((opt = getopt_long(argc, argv, "AacDdegHhIi:lNnp:rSstuVvWw::x:z",
	    longopts, NULL)) != -1) {
		switch(opt) {
		case '?':
			readelf_usage(EXIT_SUCCESS);
			break;
		case 'A':
			re->options |= RE_AA;
			break;
		case 'a':
			re->options |= RE_AA | RE_D | RE_G | RE_H | RE_II |
			    RE_L | RE_N | RE_R | RE_SS | RE_S | RE_U | RE_VV;
			break;
		case 'c':
			re->options |= RE_C;
			break;
		case 'D':
			re->options |= RE_DD;
			break;
		case 'd':
			re->options |= RE_D;
			break;
		case 'e':
			re->options |= RE_H | RE_L | RE_SS;
			break;
		case 'g':
			re->options |= RE_G;
			break;
		case 'H':
			readelf_usage(EXIT_SUCCESS);
			break;
		case 'h':
			re->options |= RE_H;
			break;
		case 'I':
			re->options |= RE_II;
			break;
		case 'i':
			/* Not implemented yet. */
			break;
		case 'l':
			re->options |= RE_L;
			break;
		case 'N':
			re->options |= RE_NN;
			break;
		case 'n':
			re->options |= RE_N;
			break;
		case 'p':
			re->options |= RE_P;
			si = strtoul(optarg, &ep, 10);
			if (*ep == '\0')
				add_dumpop(re, (size_t) si, NULL, STR_DUMP,
				    DUMP_BY_INDEX);
			else
				add_dumpop(re, 0, optarg, STR_DUMP,
				    DUMP_BY_NAME);
			break;
		case 'r':
			re->options |= RE_R;
			break;
		case 'S':
			re->options |= RE_SS;
			break;
		case 's':
			re->options |= RE_S;
			break;
		case 't':
			re->options |= RE_SS | RE_T;
			break;
		case 'u':
			re->options |= RE_U;
			break;
		case 'V':
			re->options |= RE_VV;
			break;
		case 'v':
			readelf_version();
			break;
		case 'W':
			re->options |= RE_WW;
			break;
		case 'w':
			re->options |= RE_W;
			parse_dwarf_op_short(re, optarg);
			break;
		case 'x':
			re->options |= RE_X;
			si = strtoul(optarg, &ep, 10);
			if (*ep == '\0')
				add_dumpop(re, (size_t) si, NULL, HEX_DUMP,
				    DUMP_BY_INDEX);
			else
				add_dumpop(re, 0, optarg, HEX_DUMP,
				    DUMP_BY_NAME);
			break;
		case 'z':
			re->options |= RE_Z;
			break;
		case OPTION_DEBUG_DUMP:
			re->options |= RE_W;
			parse_dwarf_op_long(re, optarg);
		}
	}

	argv += optind;
	argc -= optind;

	if (argc == 0 || re->options == 0)
		readelf_usage(EXIT_FAILURE);

	if (argc > 1)
		re->flags |= DISPLAY_FILENAME;

	if (elf_version(EV_CURRENT) == EV_NONE)
		errx(EXIT_FAILURE, "ELF library initialization failed: %s",
		    elf_errmsg(-1));

	cap_rights_init(&rights, CAP_FCNTL, CAP_FSTAT, CAP_MMAP_R, CAP_SEEK);
	fa = fileargs_init(argc, argv, O_RDONLY, 0, &rights, FA_OPEN);
	if (fa == NULL)
		err(1, "Unable to initialize casper fileargs");

	caph_cache_catpages();
	if (caph_limit_stdio() < 0) {
		fileargs_free(fa);
		err(1, "Unable to limit stdio rights");
	}
	if (caph_enter_casper() < 0) {
		fileargs_free(fa);
		err(1, "Unable to enter capability mode");
	}

	exit_code = EXIT_SUCCESS;
	for (i = 0; i < argc; i++) {
		re->filename = argv[i];
		fd = fileargs_open(fa, re->filename);
		if (fd < 0) {
			warn("open %s failed", re->filename);
			exit_code = EXIT_FAILURE;
		} else {
			if (!dump_object(re, fd))
				exit_code = EXIT_FAILURE;
			close(fd);
		}
	}

	exit(exit_code);
}