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/*--------------------------------------------------------------------*/
/*--- CPUID interface. m_cpuid.S ---*/
/*--------------------------------------------------------------------*/
/*
This file is part of Valgrind, a dynamic binary instrumentation
framework.
Copyright (C) 2000-2010 Julian Seward
jseward@acm.org
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307, USA.
The GNU General Public License is contained in the file COPYING.
*/
#include "pub_core_basics_asm.h"
/*
Bool VG_(has_cpuid)(void)
*/
#if defined(VGA_x86)
.text
.globl VG_(has_cpuid)
VG_(has_cpuid):
pushl %ebp
movl %esp, %ebp
pushl %ecx
pushfl
pushfl
popl %eax
movl %eax, %ecx
xorl $0x200000, %eax
pushl %eax
popfl
pushfl
popl %eax
popfl
xorl %ecx, %eax
andl $0x200000, %eax
shrl $21, %eax
popl %ecx
movl %ebp, %esp
popl %ebp
ret
#elif defined(VGA_amd64)
.text
.globl VG_(has_cpuid)
VG_(has_cpuid):
movq $1, %rax
ret
#endif
/*
void VG_(cpuid)(UInt eax,
UInt* eax_ret, UInt* ebx_ret, UInt* ecx_ret, UInt* edx_ret)
*/
#if defined(VGA_x86)
.text
.globl VG_(cpuid)
VG_(cpuid):
pushl %ebp
movl %esp, %ebp
pushl %eax
pushl %ebx
pushl %ecx
pushl %edx
pushl %esi
movl 8(%ebp), %eax
cpuid
movl 12(%ebp), %esi
testl %esi, %esi
jz 1f
movl %eax, (%esi)
1:
movl 16(%ebp), %esi
testl %esi, %esi
jz 2f
movl %ebx, (%esi)
2:
movl 20(%ebp), %esi
testl %esi, %esi
jz 3f
movl %ecx, (%esi)
3:
movl 24(%ebp), %esi
testl %esi, %esi
jz 4f
movl %edx, (%esi)
4:
popl %esi
popl %edx
popl %ecx
popl %ebx
popl %eax
movl %ebp, %esp
popl %ebp
ret
#elif defined(VGA_amd64)
.text
.globl VG_(cpuid)
VG_(cpuid):
pushq %rbp
movq %rsp, %rbp
pushq %rbx
movl %edi, %eax
movq %rdx, %rdi
movq %rcx, %r9
/*
eax_ret now in %rsi
ebx_ret now in %rdi
ecx_ret now in %r9
edx_ret now in %r8
*/
cpuid
testq %rsi, %rsi
jz 1f
movl %eax, (%rsi)
1:
testq %rdi, %rdi
jz 2f
movl %ebx, (%rdi)
2:
testq %r9, %r9
jz 3f
movl %ecx, (%r9)
3:
testq %r8, %r8
jz 4f
movl %edx, (%r8)
4:
popq %rbx
movq %rbp, %rsp
popq %rbp
ret
#endif
#if defined(VGP_x86_linux) || defined(VGP_amd64_linux)
/* Let the linker know we don't need an executable stack */
.section .note.GNU-stack,"",@progbits
#endif
/*--------------------------------------------------------------------*/
/*--- end ---*/
/*--------------------------------------------------------------------*/
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