arch/x86/entry/vdso/common/vdso-layout.lds.S

Source file repositories/reference/linux-study-clean/arch/x86/entry/vdso/common/vdso-layout.lds.S

File Facts

System
Linux kernel
Corpus path
arch/x86/entry/vdso/common/vdso-layout.lds.S
Extension
.S
Size
2461 bytes
Lines
110
Domain
Architecture Layer
Bucket
arch/x86
Inferred role
Architecture Layer: arch/x86
Status
atlas-only

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#include <asm/vdso.h>
#include <asm/vdso/vsyscall.h>
#include <vdso/datapage.h>

/*
 * Linker script for vDSO.  This is an ELF shared object prelinked to
 * its virtual address, and with only one read-only segment.
 * This script controls its layout.
 */

SECTIONS
{
	/*
	 * User/kernel shared data is before the vDSO.  This may be a little
	 * uglier than putting it after the vDSO, but it avoids issues with
	 * non-allocatable things that dangle past the end of the PT_LOAD
	 * segment.
	 */

	VDSO_VVAR_SYMS

	vclock_pages = VDSO_VCLOCK_PAGES_START(vdso_u_data);
	pvclock_page = vclock_pages + VDSO_PAGE_PVCLOCK_OFFSET * PAGE_SIZE;
	hvclock_page = vclock_pages + VDSO_PAGE_HVCLOCK_OFFSET * PAGE_SIZE;

	. = SIZEOF_HEADERS;

	.hash		: { *(.hash) }			:text
	.gnu.hash	: { *(.gnu.hash) }
	.dynsym		: { *(.dynsym) }
	.dynstr		: { *(.dynstr) }
	.gnu.version	: { *(.gnu.version) }
	.gnu.version_d	: { *(.gnu.version_d) }
	.gnu.version_r	: { *(.gnu.version_r) }

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

	.rodata		: {
		*(.rodata*)
		*(.data*)
		*(.sdata*)
		*(.got.plt) *(.got)
		*(.gnu.linkonce.d.*)
		*(.bss*)
		*(.dynbss*)
		*(.gnu.linkonce.b.*)
	}						:text

	.note.gnu.property : {
		*(.note.gnu.property)
	}					:text :note :gnu_property
	.note		: {
		*(.note*)
	}					:text :note

	.eh_frame_hdr	: { *(.eh_frame_hdr) }	:text :eh_frame_hdr
	.eh_frame	: {
		KEEP (*(.eh_frame))
		*(.eh_frame.*)
	}					:text

	/*
	 * Text is well-separated from actual data: there's plenty of
	 * stuff that isn't used at runtime in between.
	 */

	.text		: {
		*(.text*)
	}						:text	=0x90909090,

Annotation

Implementation Notes