1/* SPDX-License-Identifier: GPL-2.0 */
2#include <linux/linkage.h>
3
4#define AX 0
5#define BX 1 * 8
6#define CX 2 * 8
7#define DX 3 * 8
8#define SI 4 * 8
9#define DI 5 * 8
10#define BP 6 * 8
11#define SP 7 * 8
12#define IP 8 * 8
13#define FLAGS 9 * 8
14#define CS 10 * 8
15#define SS 11 * 8
16#define DS 12 * 8
17#define ES 13 * 8
18#define FS 14 * 8
19#define GS 15 * 8
20#define R8 16 * 8
21#define R9 17 * 8
22#define R10 18 * 8
23#define R11 19 * 8
24#define R12 20 * 8
25#define R13 21 * 8
26#define R14 22 * 8
27#define R15 23 * 8
28
29.text
30#ifdef HAVE_ARCH_X86_64_SUPPORT
31SYM_FUNC_START(perf_regs_load)
32 movq %rax, AX(%rdi)
33 movq %rbx, BX(%rdi)
34 movq %rcx, CX(%rdi)
35 movq %rdx, DX(%rdi)
36 movq %rsi, SI(%rdi)
37 movq %rdi, DI(%rdi)
38 movq %rbp, BP(%rdi)
39
40 leaq 8(%rsp), %rax /* exclude this call. */
41 movq %rax, SP(%rdi)
42
43 movq 0(%rsp), %rax
44 movq %rax, IP(%rdi)
45
46 movq $0, FLAGS(%rdi)
47 movq $0, CS(%rdi)
48 movq $0, SS(%rdi)
49 movq $0, DS(%rdi)
50 movq $0, ES(%rdi)
51 movq $0, FS(%rdi)
52 movq $0, GS(%rdi)
53
54 movq %r8, R8(%rdi)
55 movq %r9, R9(%rdi)
56 movq %r10, R10(%rdi)
57 movq %r11, R11(%rdi)
58 movq %r12, R12(%rdi)
59 movq %r13, R13(%rdi)
60 movq %r14, R14(%rdi)
61 movq %r15, R15(%rdi)
62 ret
63SYM_FUNC_END(perf_regs_load)
64#else
65SYM_FUNC_START(perf_regs_load)
66 push %edi
67 movl 8(%esp), %edi
68 movl %eax, AX(%edi)
69 movl %ebx, BX(%edi)
70 movl %ecx, CX(%edi)
71 movl %edx, DX(%edi)
72 movl %esi, SI(%edi)
73 pop %eax
74 movl %eax, DI(%edi)
75 movl %ebp, BP(%edi)
76
77 leal 4(%esp), %eax /* exclude this call. */
78 movl %eax, SP(%edi)
79
80 movl 0(%esp), %eax
81 movl %eax, IP(%edi)
82
83 movl $0, FLAGS(%edi)
84 movl $0, CS(%edi)
85 movl $0, SS(%edi)
86 movl $0, DS(%edi)
87 movl $0, ES(%edi)
88 movl $0, FS(%edi)
89 movl $0, GS(%edi)
90 ret
91SYM_FUNC_END(perf_regs_load)
92#endif
93
94/*
95 * We need to provide note.GNU-stack section, saying that we want
96 * NOT executable stack. Otherwise the final linking will assume that
97 * the ELF stack should not be restricted at all and set it RWX.
98 */
99.section .note.GNU-stack,"",@progbits
100

source code of linux/tools/perf/arch/x86/tests/regs_load.S