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 |
31 | SYM_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 |
63 | SYM_FUNC_END(perf_regs_load) |
64 | #else |
65 | SYM_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 |
91 | SYM_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 | |