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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/tools/perf/arch/x86/tests/regs_load.S
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/* SPDX-License-Identifier: GPL-2.0 */

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#include <linux/linkage.h>

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#define AX	 0

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#define BX	 1 * 8

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#define CX	 2 * 8

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#define DX	 3 * 8

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#define SI	 4 * 8

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#define DI	 5 * 8

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#define BP	 6 * 8

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#define SP	 7 * 8

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#define IP	 8 * 8

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#define FLAGS	 9 * 8

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#define CS	10 * 8

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#define SS	11 * 8

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#define DS	12 * 8

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#define ES	13 * 8

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#define FS	14 * 8

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#define GS	15 * 8

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#define R8	16 * 8

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#define R9	17 * 8

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#define R10	18 * 8

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#define R11	19 * 8

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#define R12	20 * 8

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#define R13	21 * 8

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#define R14	22 * 8

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#define R15	23 * 8

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.text

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#ifdef HAVE_ARCH_X86_64_SUPPORT

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SYM_FUNC_START(perf_regs_load)

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	movq %rax, AX(%rdi)

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	movq %rbx, BX(%rdi)

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	movq %rcx, CX(%rdi)

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	movq %rdx, DX(%rdi)

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	movq %rsi, SI(%rdi)

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	movq %rdi, DI(%rdi)

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	movq %rbp, BP(%rdi)

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	leaq 8(%rsp), %rax /* exclude this call.  */

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	movq %rax, SP(%rdi)

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	movq 0(%rsp), %rax

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	movq %rax, IP(%rdi)

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	movq $0, FLAGS(%rdi)

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	movq $0, CS(%rdi)

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	movq $0, SS(%rdi)

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	movq $0, DS(%rdi)

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	movq $0, ES(%rdi)

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	movq $0, FS(%rdi)

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	movq $0, GS(%rdi)

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	movq %r8,  R8(%rdi)

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	movq %r9,  R9(%rdi)

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	movq %r10, R10(%rdi)

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	movq %r11, R11(%rdi)

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	movq %r12, R12(%rdi)

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	movq %r13, R13(%rdi)

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	movq %r14, R14(%rdi)

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	movq %r15, R15(%rdi)

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	ret

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SYM_FUNC_END(perf_regs_load)

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#else

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SYM_FUNC_START(perf_regs_load)

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	push %edi

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	movl 8(%esp), %edi

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	movl %eax, AX(%edi)

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	movl %ebx, BX(%edi)

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	movl %ecx, CX(%edi)

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	movl %edx, DX(%edi)

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	movl %esi, SI(%edi)

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	pop %eax

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	movl %eax, DI(%edi)

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	movl %ebp, BP(%edi)

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	leal 4(%esp), %eax /* exclude this call.  */

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	movl %eax, SP(%edi)

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	movl 0(%esp), %eax

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	movl %eax, IP(%edi)

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	movl $0, FLAGS(%edi)

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	movl $0, CS(%edi)

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	movl $0, SS(%edi)

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	movl $0, DS(%edi)

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	movl $0, ES(%edi)

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	movl $0, FS(%edi)

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	movl $0, GS(%edi)

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	ret

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SYM_FUNC_END(perf_regs_load)

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#endif

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/*

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 * We need to provide note.GNU-stack section, saying that we want

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 * NOT executable stack. Otherwise the final linking will assume that

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 * the ELF stack should not be restricted at all and set it RWX.

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 */

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.section .note.GNU-stack,"",@progbits

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