arch/x86/kernel/acpi/wakeup_64.S

Source file repositories/reference/linux-study-clean/arch/x86/kernel/acpi/wakeup_64.S

File Facts

System
Linux kernel
Corpus path
arch/x86/kernel/acpi/wakeup_64.S
Extension
.S
Size
3304 bytes
Lines
146
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

.text
#include <linux/linkage.h>
#include <linux/objtool.h>
#include <asm/segment.h>
#include <asm/pgtable_types.h>
#include <asm/page_types.h>
#include <asm/msr.h>
#include <asm/asm-offsets.h>
#include <asm/frame.h>
#include <asm/nospec-branch.h>

# Copyright 2003 Pavel Machek <pavel@suse.cz

.code64
	/*
	 * Hooray, we are in Long 64-bit mode (but still running in low memory)
	 */
SYM_FUNC_START(wakeup_long64)
	ANNOTATE_NOENDBR
	movq	saved_magic(%rip), %rax
	movq	$0x123456789abcdef0, %rdx
	cmpq	%rdx, %rax
	je	2f

	/* stop here on a saved_magic mismatch */
	movq $0xbad6d61676963, %rcx
1:
	jmp 1b
2:
	movw	$__KERNEL_DS, %ax
	movw	%ax, %ss	
	movw	%ax, %ds
	movw	%ax, %es
	movw	%ax, %fs
	movw	%ax, %gs
	movq	saved_rsp(%rip), %rsp

	movq	saved_rbx(%rip), %rbx
	movq	saved_rdi(%rip), %rdi
	movq	saved_rsi(%rip), %rsi
	movq	saved_rbp(%rip), %rbp

	movq	saved_rip(%rip), %rax
	ANNOTATE_RETPOLINE_SAFE
	jmp	*%rax
SYM_FUNC_END(wakeup_long64)

SYM_FUNC_START(do_suspend_lowlevel)
	FRAME_BEGIN
	subq	$8, %rsp
	xorl	%eax, %eax
	call	save_processor_state

	movq	$saved_context, %rax
	movq	%rsp, pt_regs_sp(%rax)
	movq	%rbp, pt_regs_bp(%rax)
	movq	%rsi, pt_regs_si(%rax)
	movq	%rdi, pt_regs_di(%rax)
	movq	%rbx, pt_regs_bx(%rax)
	movq	%rcx, pt_regs_cx(%rax)
	movq	%rdx, pt_regs_dx(%rax)
	movq	%r8, pt_regs_r8(%rax)
	movq	%r9, pt_regs_r9(%rax)
	movq	%r10, pt_regs_r10(%rax)
	movq	%r11, pt_regs_r11(%rax)
	movq	%r12, pt_regs_r12(%rax)
	movq	%r13, pt_regs_r13(%rax)
	movq	%r14, pt_regs_r14(%rax)
	movq	%r15, pt_regs_r15(%rax)
	pushfq

Annotation

Implementation Notes