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) 2000-2017 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, UInt ecx, 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 movl 12(%ebp), %ecx 85 cpuid 86 movl 16(%ebp), %esi 87 testl %esi, %esi 88 jz 1f 89 movl %eax, (%esi) 90 1: 91 movl 20(%ebp), %esi 92 testl %esi, %esi 93 jz 2f 94 movl %ebx, (%esi) 95 2: 96 movl 24(%ebp), %esi 97 testl %esi, %esi 98 jz 3f 99 movl %ecx, (%esi) 100 3: 101 movl 28(%ebp), %esi 102 testl %esi, %esi 103 jz 4f 104 movl %edx, (%esi) 105 4: 106 popl %esi 107 popl %edx 108 popl %ecx 109 popl %ebx 110 popl %eax 111 movl %ebp, %esp 112 popl %ebp 113 ret 114 #elif defined(VGA_amd64) 115 .text 116 .globl VG_(cpuid) 117 VG_(cpuid): 118 pushq %rbp 119 movq %rsp, %rbp 120 pushq %rbx 121 movl %edi, %eax 122 movq %rcx, %rdi 123 movl %esi, %ecx 124 movq %rdx, %rsi 125 /* 126 eax_ret now in %rsi 127 ebx_ret now in %rdi 128 ecx_ret now in %r8 129 edx_ret now in %r9 130 */ 131 cpuid 132 testq %rsi, %rsi 133 jz 1f 134 movl %eax, (%rsi) 135 1: 136 testq %rdi, %rdi 137 jz 2f 138 movl %ebx, (%rdi) 139 2: 140 testq %r8, %r8 141 jz 3f 142 movl %ecx, (%r8) 143 3: 144 testq %r9, %r9 145 jz 4f 146 movl %edx, (%r9) 147 4: 148 popq %rbx 149 movq %rbp, %rsp 150 popq %rbp 151 ret 152 #endif 153 154 /* Let the linker know we don't need an executable stack */ 155 MARK_STACK_NO_EXEC 156 157 /*--------------------------------------------------------------------*/ 158 /*--- end ---*/ 159 /*--------------------------------------------------------------------*/ 160
