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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/ia64/kernel/gate.lds.S
10817 views
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/*

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 * Linker script for gate DSO.  The gate pages are an ELF shared object

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 * prelinked to its virtual address, with only one read-only segment and

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 * one execute-only segment (both fit in one page).  This script controls

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 * its layout.

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 */

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#include <asm/system.h>

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#include "paravirt_patchlist.h"

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SECTIONS

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{

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	. = GATE_ADDR + SIZEOF_HEADERS;

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	.hash			: { *(.hash) }		:readable

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	.gnu.hash		: { *(.gnu.hash) }

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	.dynsym			: { *(.dynsym) }

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	.dynstr			: { *(.dynstr) }

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	.gnu.version		: { *(.gnu.version) }

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	.gnu.version_d		: { *(.gnu.version_d) }

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	.gnu.version_r		: { *(.gnu.version_r) }

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	.note			: { *(.note*) }		:readable	:note

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	.dynamic		: { *(.dynamic) }	:readable	:dynamic

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	/*

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	 * This linker script is used both with -r and with -shared.  For

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	 * the layouts to match, we need to skip more than enough space for

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	 * the dynamic symbol table et al.  If this amount is insufficient,

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	 * ld -shared will barf.  Just increase it here.

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	 */

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	. = GATE_ADDR + 0x600;

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	.data..patch		: {

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		__paravirt_start_gate_mckinley_e9_patchlist = .;

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		*(.data..patch.mckinley_e9)

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		__paravirt_end_gate_mckinley_e9_patchlist = .;

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		__paravirt_start_gate_vtop_patchlist = .;

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		*(.data..patch.vtop)

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		__paravirt_end_gate_vtop_patchlist = .;

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		__paravirt_start_gate_fsyscall_patchlist = .;

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		*(.data..patch.fsyscall_table)

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		__paravirt_end_gate_fsyscall_patchlist = .;

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		__paravirt_start_gate_brl_fsys_bubble_down_patchlist = .;

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		*(.data..patch.brl_fsys_bubble_down)

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		__paravirt_end_gate_brl_fsys_bubble_down_patchlist = .;

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	}						:readable

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	.IA_64.unwind_info	: { *(.IA_64.unwind_info*) }

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	.IA_64.unwind		: { *(.IA_64.unwind*) }	:readable	:unwind

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#ifdef HAVE_BUGGY_SEGREL

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	.text (GATE_ADDR + PAGE_SIZE) : { *(.text) *(.text.*) }	:readable

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#else

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	. = ALIGN(PERCPU_PAGE_SIZE) + (. & (PERCPU_PAGE_SIZE - 1));

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	.text			: { *(.text) *(.text.*) }	:epc

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#endif

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	/DISCARD/		: {

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		*(.got.plt) *(.got)

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		*(.data .data.* .gnu.linkonce.d.*)

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		*(.dynbss)

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		*(.bss .bss.* .gnu.linkonce.b.*)

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		*(__ex_table)

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		*(__mca_table)

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	}

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}

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/*

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 * ld does not recognize this name token; use the constant.

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 */

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#define	PT_IA_64_UNWIND	0x70000001

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/*

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 * We must supply the ELF program headers explicitly to get just one

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 * PT_LOAD segment, and set the flags explicitly to make segments read-only.

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 */

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PHDRS

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{

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	readable	PT_LOAD	FILEHDR	PHDRS	FLAGS(4);	/* PF_R */

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#ifndef HAVE_BUGGY_SEGREL

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	epc		PT_LOAD	FILEHDR PHDRS	FLAGS(1);	/* PF_X */

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#endif

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	dynamic		PT_DYNAMIC		FLAGS(4);	/* PF_R */

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	note		PT_NOTE			FLAGS(4);	/* PF_R */

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	unwind		PT_IA_64_UNWIND;

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}

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/*

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 * This controls what symbols we export from the DSO.

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 */

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VERSION

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{

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	LINUX_2.5 {

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	global:

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		__kernel_syscall_via_break;

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		__kernel_syscall_via_epc;

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		__kernel_sigtramp;

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	local: *;

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	};

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}

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/* The ELF entry point can be used to set the AT_SYSINFO value.  */

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ENTRY(__kernel_syscall_via_epc)

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