1 2 /*--------------------------------------------------------------------*/ 3 /*--- CPUID interface. m_cpuid.S ---*/ 4 /*--------------------------------------------------------------------*/ 5 6 /* 7 This file is part of Valgrind, a dynamic binary instrumentation 8 framework. 9 10 Copyright (C) 2000-2010 Julian Seward 11 jseward (at) acm.org 12 13 This program is free software; you can redistribute it and/or 14 modify it under the terms of the GNU General Public License as 15 published by the Free Software Foundation; either version 2 of the 16 License, or (at your option) any later version. 17 18 This program is distributed in the hope that it will be useful, but 19 WITHOUT ANY WARRANTY; without even the implied warranty of 20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 21 General Public License for more details. 22 23 You should have received a copy of the GNU General Public License 24 along with this program; if not, write to the Free Software 25 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 26 02111-1307, USA. 27 28 The GNU General Public License is contained in the file COPYING. 29 */ 30 31 #include "pub_core_basics_asm.h" 32 33 /* 34 Bool VG_(has_cpuid)(void) 35 */ 36 #if defined(VGA_x86) 37 .text 38 .globl VG_(has_cpuid) 39 VG_(has_cpuid): 40 pushl %ebp 41 movl %esp, %ebp 42 pushl %ecx 43 pushfl 44 pushfl 45 popl %eax 46 movl %eax, %ecx 47 xorl $0x200000, %eax 48 pushl %eax 49 popfl 50 pushfl 51 popl %eax 52 popfl 53 xorl %ecx, %eax 54 andl $0x200000, %eax 55 shrl $21, %eax 56 popl %ecx 57 movl %ebp, %esp 58 popl %ebp 59 ret 60 #elif defined(VGA_amd64) 61 .text 62 .globl VG_(has_cpuid) 63 VG_(has_cpuid): 64 movq $1, %rax 65 ret 66 #endif 67 68 /* 69 void VG_(cpuid)(UInt eax, 70 UInt* eax_ret, UInt* ebx_ret, UInt* ecx_ret, UInt* edx_ret) 71 */ 72 #if defined(VGA_x86) 73 .text 74 .globl VG_(cpuid) 75 VG_(cpuid): 76 pushl %ebp 77 movl %esp, %ebp 78 pushl %eax 79 pushl %ebx 80 pushl %ecx 81 pushl %edx 82 pushl %esi 83 movl 8(%ebp), %eax 84 cpuid 85 movl 12(%ebp), %esi 86 testl %esi, %esi 87 jz 1f 88 movl %eax, (%esi) 89 1: 90 movl 16(%ebp), %esi 91 testl %esi, %esi 92 jz 2f 93 movl %ebx, (%esi) 94 2: 95 movl 20(%ebp), %esi 96 testl %esi, %esi 97 jz 3f 98 movl %ecx, (%esi) 99 3: 100 movl 24(%ebp), %esi 101 testl %esi, %esi 102 jz 4f 103 movl %edx, (%esi) 104 4: 105 popl %esi 106 popl %edx 107 popl %ecx 108 popl %ebx 109 popl %eax 110 movl %ebp, %esp 111 popl %ebp 112 ret 113 #elif defined(VGA_amd64) 114 .text 115 .globl VG_(cpuid) 116 VG_(cpuid): 117 pushq %rbp 118 movq %rsp, %rbp 119 pushq %rbx 120 movl %edi, %eax 121 movq %rdx, %rdi 122 movq %rcx, %r9 123 /* 124 eax_ret now in %rsi 125 ebx_ret now in %rdi 126 ecx_ret now in %r9 127 edx_ret now in %r8 128 */ 129 cpuid 130 testq %rsi, %rsi 131 jz 1f 132 movl %eax, (%rsi) 133 1: 134 testq %rdi, %rdi 135 jz 2f 136 movl %ebx, (%rdi) 137 2: 138 testq %r9, %r9 139 jz 3f 140 movl %ecx, (%r9) 141 3: 142 testq %r8, %r8 143 jz 4f 144 movl %edx, (%r8) 145 4: 146 popq %rbx 147 movq %rbp, %rsp 148 popq %rbp 149 ret 150 #endif 151 152 #if defined(VGP_x86_linux) || defined(VGP_amd64_linux) 153 /* Let the linker know we don't need an executable stack */ 154 .section .note.GNU-stack,"",@progbits 155 #endif 156 157 /*--------------------------------------------------------------------*/ 158 /*--- end ---*/ 159 /*--------------------------------------------------------------------*/ 160
