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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/mips/kernel/binfmt_elfn32.c
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/*

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 * Support for n32 Linux/MIPS ELF binaries.

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 *

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 * Copyright (C) 1999, 2001 Ralf Baechle

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 * Copyright (C) 1999, 2001 Silicon Graphics, Inc.

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 *

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 * Heavily inspired by the 32-bit Sparc compat code which is

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 * Copyright (C) 1995, 1996, 1997, 1998 David S. Miller ([email protected])

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 * Copyright (C) 1995, 1996, 1997, 1998 Jakub Jelinek   ([email protected])

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 */

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#define ELF_ARCH		EM_MIPS

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#define ELF_CLASS		ELFCLASS32

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#ifdef __MIPSEB__

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#define ELF_DATA		ELFDATA2MSB;

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#else /* __MIPSEL__ */

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#define ELF_DATA		ELFDATA2LSB;

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#endif

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/* ELF register definitions */

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#define ELF_NGREG	45

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#define ELF_NFPREG	33

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typedef unsigned long elf_greg_t;

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typedef elf_greg_t elf_gregset_t[ELF_NGREG];

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typedef double elf_fpreg_t;

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typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];

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/*

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 * This is used to ensure we don't load something for the wrong architecture.

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 */

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#define elf_check_arch(hdr)						\

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({									\

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	int __res = 1;							\

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	struct elfhdr *__h = (hdr);					\

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									\

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	if (__h->e_machine != EM_MIPS)					\

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		__res = 0;						\

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	if (__h->e_ident[EI_CLASS] != ELFCLASS32)			\

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		__res = 0;						\

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	if (((__h->e_flags & EF_MIPS_ABI2) == 0) ||			\

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	    ((__h->e_flags & EF_MIPS_ABI) != 0))			\

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		__res = 0;						\

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									\

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	__res;								\

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})

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#define TASK32_SIZE		0x7fff8000UL

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#undef ELF_ET_DYN_BASE

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#define ELF_ET_DYN_BASE         (TASK32_SIZE / 3 * 2)

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#include <asm/processor.h>

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#include <linux/module.h>

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#include <linux/elfcore.h>

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#include <linux/compat.h>

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#include <linux/math64.h>

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#define elf_prstatus elf_prstatus32

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struct elf_prstatus32

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{

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	struct elf_siginfo pr_info;	/* Info associated with signal */

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	short	pr_cursig;		/* Current signal */

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	unsigned int pr_sigpend;	/* Set of pending signals */

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	unsigned int pr_sighold;	/* Set of held signals */

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	pid_t	pr_pid;

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	pid_t	pr_ppid;

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	pid_t	pr_pgrp;

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	pid_t	pr_sid;

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	struct compat_timeval pr_utime;	/* User time */

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	struct compat_timeval pr_stime;	/* System time */

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	struct compat_timeval pr_cutime;/* Cumulative user time */

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	struct compat_timeval pr_cstime;/* Cumulative system time */

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	elf_gregset_t pr_reg;	/* GP registers */

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	int pr_fpvalid;		/* True if math co-processor being used.  */

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};

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#define elf_prpsinfo elf_prpsinfo32

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struct elf_prpsinfo32

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{

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	char	pr_state;	/* numeric process state */

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	char	pr_sname;	/* char for pr_state */

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	char	pr_zomb;	/* zombie */

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	char	pr_nice;	/* nice val */

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	unsigned int pr_flag;	/* flags */

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	__kernel_uid_t	pr_uid;

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	__kernel_gid_t	pr_gid;

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	pid_t	pr_pid, pr_ppid, pr_pgrp, pr_sid;

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	/* Lots missing */

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	char	pr_fname[16];	/* filename of executable */

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	char	pr_psargs[ELF_PRARGSZ];	/* initial part of arg list */

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};

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#define elf_caddr_t	u32

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#define init_elf_binfmt init_elfn32_binfmt

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#define jiffies_to_timeval jiffies_to_compat_timeval

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static __inline__ void

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jiffies_to_compat_timeval(unsigned long jiffies, struct compat_timeval *value)

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{

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	/*

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	 * Convert jiffies to nanoseconds and separate with

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	 * one divide.

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	 */

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	u64 nsec = (u64)jiffies * TICK_NSEC;

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	u32 rem;

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	value->tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem);

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	value->tv_usec = rem / NSEC_PER_USEC;

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}

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#define ELF_CORE_EFLAGS EF_MIPS_ABI2

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MODULE_DESCRIPTION("Binary format loader for compatibility with n32 Linux/MIPS binaries");

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MODULE_AUTHOR("Ralf Baechle ([email protected])");

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#undef MODULE_DESCRIPTION

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#undef MODULE_AUTHOR

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#undef TASK_SIZE

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#define TASK_SIZE TASK_SIZE32

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#include "../../../fs/binfmt_elf.c"

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