LXR linux/tools/perf/arch/x86/tests/regs

   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
  31ENTRY(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
  63ENDPROC(perf_regs_load)
  64#else
  65ENTRY(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
  91ENDPROC(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