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143 lines
3.1 KiB
143 lines
3.1 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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.text |
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#include <linux/linkage.h> |
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#include <linux/objtool.h> |
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#include <asm/segment.h> |
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#include <asm/pgtable_types.h> |
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#include <asm/page_types.h> |
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#include <asm/msr.h> |
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#include <asm/asm-offsets.h> |
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#include <asm/frame.h> |
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#include <asm/nospec-branch.h> |
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# Copyright 2003 Pavel Machek <pavel@suse.cz |
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.code64 |
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/* |
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* Hooray, we are in Long 64-bit mode (but still running in low memory) |
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*/ |
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SYM_FUNC_START(wakeup_long64) |
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movq saved_magic, %rax |
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movq $0x123456789abcdef0, %rdx |
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cmpq %rdx, %rax |
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je 2f |
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/* stop here on a saved_magic mismatch */ |
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movq $0xbad6d61676963, %rcx |
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1: |
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jmp 1b |
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2: |
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movw $__KERNEL_DS, %ax |
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movw %ax, %ss |
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movw %ax, %ds |
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movw %ax, %es |
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movw %ax, %fs |
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movw %ax, %gs |
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movq saved_rsp, %rsp |
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movq saved_rbx, %rbx |
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movq saved_rdi, %rdi |
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movq saved_rsi, %rsi |
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movq saved_rbp, %rbp |
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movq saved_rip, %rax |
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ANNOTATE_RETPOLINE_SAFE |
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jmp *%rax |
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SYM_FUNC_END(wakeup_long64) |
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SYM_FUNC_START(do_suspend_lowlevel) |
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FRAME_BEGIN |
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subq $8, %rsp |
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xorl %eax, %eax |
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call save_processor_state |
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movq $saved_context, %rax |
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movq %rsp, pt_regs_sp(%rax) |
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movq %rbp, pt_regs_bp(%rax) |
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movq %rsi, pt_regs_si(%rax) |
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movq %rdi, pt_regs_di(%rax) |
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movq %rbx, pt_regs_bx(%rax) |
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movq %rcx, pt_regs_cx(%rax) |
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movq %rdx, pt_regs_dx(%rax) |
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movq %r8, pt_regs_r8(%rax) |
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movq %r9, pt_regs_r9(%rax) |
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movq %r10, pt_regs_r10(%rax) |
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movq %r11, pt_regs_r11(%rax) |
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movq %r12, pt_regs_r12(%rax) |
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movq %r13, pt_regs_r13(%rax) |
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movq %r14, pt_regs_r14(%rax) |
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movq %r15, pt_regs_r15(%rax) |
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pushfq |
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popq pt_regs_flags(%rax) |
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movq $.Lresume_point, saved_rip(%rip) |
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movq %rsp, saved_rsp |
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movq %rbp, saved_rbp |
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movq %rbx, saved_rbx |
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movq %rdi, saved_rdi |
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movq %rsi, saved_rsi |
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addq $8, %rsp |
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movl $3, %edi |
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xorl %eax, %eax |
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call x86_acpi_enter_sleep_state |
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/* in case something went wrong, restore the machine status and go on */ |
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jmp .Lresume_point |
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.align 4 |
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.Lresume_point: |
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/* We don't restore %rax, it must be 0 anyway */ |
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movq $saved_context, %rax |
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movq saved_context_cr4(%rax), %rbx |
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movq %rbx, %cr4 |
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movq saved_context_cr3(%rax), %rbx |
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movq %rbx, %cr3 |
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movq saved_context_cr2(%rax), %rbx |
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movq %rbx, %cr2 |
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movq saved_context_cr0(%rax), %rbx |
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movq %rbx, %cr0 |
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pushq pt_regs_flags(%rax) |
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popfq |
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movq pt_regs_sp(%rax), %rsp |
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movq pt_regs_bp(%rax), %rbp |
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movq pt_regs_si(%rax), %rsi |
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movq pt_regs_di(%rax), %rdi |
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movq pt_regs_bx(%rax), %rbx |
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movq pt_regs_cx(%rax), %rcx |
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movq pt_regs_dx(%rax), %rdx |
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movq pt_regs_r8(%rax), %r8 |
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movq pt_regs_r9(%rax), %r9 |
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movq pt_regs_r10(%rax), %r10 |
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movq pt_regs_r11(%rax), %r11 |
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movq pt_regs_r12(%rax), %r12 |
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movq pt_regs_r13(%rax), %r13 |
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movq pt_regs_r14(%rax), %r14 |
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movq pt_regs_r15(%rax), %r15 |
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#if defined(CONFIG_KASAN) && defined(CONFIG_KASAN_STACK) |
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/* |
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* The suspend path may have poisoned some areas deeper in the stack, |
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* which we now need to unpoison. |
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*/ |
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movq %rsp, %rdi |
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call kasan_unpoison_task_stack_below |
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#endif |
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xorl %eax, %eax |
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addq $8, %rsp |
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FRAME_END |
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jmp restore_processor_state |
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SYM_FUNC_END(do_suspend_lowlevel) |
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STACK_FRAME_NON_STANDARD do_suspend_lowlevel |
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.data |
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saved_rbp: .quad 0 |
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saved_rsi: .quad 0 |
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saved_rdi: .quad 0 |
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saved_rbx: .quad 0 |
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saved_rip: .quad 0 |
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saved_rsp: .quad 0 |
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SYM_DATA(saved_magic, .quad 0)
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