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https://github.com/Zenithsiz/ftmemsim-valgrind.git
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87 lines
2.4 KiB
ArmAsm
87 lines
2.4 KiB
ArmAsm
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##--------------------------------------------------------------------##
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##--- Support for determining CPU characteristics. amd64/cpuid.S ---##
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##--------------------------------------------------------------------##
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/*
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This file is part of Valgrind, a dynamic binary instrumentation
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framework.
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Copyright (C) 2000-2005 Julian Seward
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jseward@acm.org
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307, USA.
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The GNU General Public License is contained in the file COPYING.
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*/
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#include "core_asm.h"
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/*
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Bool VG_(has_cpuid)(void)
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*/
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.globl VG_(has_cpuid)
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VG_(has_cpuid):
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movq $1, %rax
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ret
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/*
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int VG_(cpuid)(UInt eax,
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UInt *eax_ret, UInt *ebx_ret, UInt *ecx_ret, UInt *edx_ret)
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*/
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.globl VG_(cpuid)
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VG_(cpuid):
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pushq %rbp
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movq %rsp, %rbp
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pushq %rbx
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movl %edi, %eax
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movq %rdx, %rdi
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movq %rcx, %r9
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/*
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eax_ret now in %rsi
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ebx_ret now in %rdi
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ecx_ret now in %r9
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edx_ret now in %r8
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*/
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cpuid
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testq %rsi, %rsi
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jz 1f
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movl %eax, (%rsi)
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1:
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testq %rdi, %rdi
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jz 2f
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movl %ebx, (%rdi)
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2:
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testq %r9, %r9
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jz 3f
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movl %ecx, (%r9)
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3:
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testq %r8, %r8
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jz 4f
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movl %edx, (%r8)
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4:
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popq %rbx
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movq %rbp, %rsp
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popq %rbp
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ret
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/* Let the linker know we don't need an executable stack */
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.section .note.GNU-stack,"",@progbits
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##--------------------------------------------------------------------##
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##--- end ---##
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##--------------------------------------------------------------------##
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