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ftmemsim-valgrind/coregrind/pub_core_machine.h
Julian Seward 19bc251432 arm-linux: determine whether the host supports Neon by looking at our 
AUXV at startup, rather than by trying to execute a Neon instruction
and seeing whether it SIGILLs.  Apparently the latter is not a
reliable way to ascertain the presence of usable Neon support.  Fixes
#249775.



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@11347
2010-09-09 07:25:58 +00:00

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/*--------------------------------------------------------------------*/
/*--- Machine-related things. pub_core_machine.h ---*/
/*--------------------------------------------------------------------*/
/*
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.
*/
#ifndef __PUB_CORE_MACHINE_H
#define __PUB_CORE_MACHINE_H
//--------------------------------------------------------------------
// PURPOSE: This module contains code related to the particular
// architecture, things like accessing guest state, endianness, word size,
// etc.
//--------------------------------------------------------------------
#include "pub_tool_machine.h"
// XXX: this is *really* the wrong spot for these things
#if defined(VGP_x86_linux)
# define VG_ELF_DATA2XXX ELFDATA2LSB
# define VG_ELF_MACHINE EM_386
# define VG_ELF_CLASS ELFCLASS32
# undef VG_PLAT_USES_PPCTOC
#elif defined(VGP_amd64_linux)
# define VG_ELF_DATA2XXX ELFDATA2LSB
# define VG_ELF_MACHINE EM_X86_64
# define VG_ELF_CLASS ELFCLASS64
# undef VG_PLAT_USES_PPCTOC
#elif defined(VGP_ppc32_linux)
# define VG_ELF_DATA2XXX ELFDATA2MSB
# define VG_ELF_MACHINE EM_PPC
# define VG_ELF_CLASS ELFCLASS32
# undef VG_PLAT_USES_PPCTOC
#elif defined(VGP_ppc64_linux)
# define VG_ELF_DATA2XXX ELFDATA2MSB
# define VG_ELF_MACHINE EM_PPC64
# define VG_ELF_CLASS ELFCLASS64
# define VG_PLAT_USES_PPCTOC 1
#elif defined(VGP_arm_linux)
# define VG_ELF_DATA2XXX ELFDATA2LSB
# define VG_ELF_MACHINE EM_ARM
# define VG_ELF_CLASS ELFCLASS32
# undef VG_PLAT_USES_PPCTOC
#elif defined(VGO_aix5)
# undef VG_ELF_DATA2XXX
# undef VG_ELF_MACHINE
# undef VG_ELF_CLASS
# define VG_PLAT_USES_PPCTOC 1
#elif defined(VGO_darwin)
# undef VG_ELF_DATA2XXX
# undef VG_ELF_MACHINE
# undef VG_ELF_CLASS
# undef VG_PLAT_USES_PPCTOC
#else
# error Unknown platform
#endif
#if defined(VGA_x86)
# define VG_INSTR_PTR guest_EIP
# define VG_STACK_PTR guest_ESP
# define VG_FRAME_PTR guest_EBP
#elif defined(VGA_amd64)
# define VG_INSTR_PTR guest_RIP
# define VG_STACK_PTR guest_RSP
# define VG_FRAME_PTR guest_RBP
#elif defined(VGA_ppc32)
# define VG_INSTR_PTR guest_CIA
# define VG_STACK_PTR guest_GPR1
# define VG_FRAME_PTR guest_GPR1 // No frame ptr for PPC
#elif defined(VGA_ppc64)
# define VG_INSTR_PTR guest_CIA
# define VG_STACK_PTR guest_GPR1
# define VG_FRAME_PTR guest_GPR1 // No frame ptr for PPC
#elif defined(VGA_arm)
# define VG_INSTR_PTR guest_R15T
# define VG_STACK_PTR guest_R13
# define VG_FRAME_PTR guest_R11
#else
# error Unknown arch
#endif
// Offsets for the Vex state
#define VG_O_STACK_PTR (offsetof(VexGuestArchState, VG_STACK_PTR))
#define VG_O_INSTR_PTR (offsetof(VexGuestArchState, VG_INSTR_PTR))
//-------------------------------------------------------------
// Guest state accessors that are not visible to tools. The only
// ones that are visible are get_IP and get_SP.
//Addr VG_(get_IP) ( ThreadId tid ); // in pub_tool_machine.h
//Addr VG_(get_SP) ( ThreadId tid ); // in pub_tool_machine.h
Addr VG_(get_FP) ( ThreadId tid );
void VG_(set_IP) ( ThreadId tid, Addr encip );
void VG_(set_SP) ( ThreadId tid, Addr sp );
//-------------------------------------------------------------
// Get hold of the values needed for a stack unwind, for the specified
// (client) thread.
void VG_(get_UnwindStartRegs) ( /*OUT*/UnwindStartRegs* regs,
ThreadId tid );
//-------------------------------------------------------------
/* Details about the capabilities of the underlying (host) CPU. These
details are acquired by (1) enquiring with the CPU at startup, or
(2) from the AT_SYSINFO entries the kernel gave us (ppc cache
line size). It's a bit nasty in the sense that there's no obvious
way to stop uses of some of this info before it's ready to go.
Current dependencies are:
x86: initially: call VG_(machine_get_hwcaps)
then safe to use VG_(machine_get_VexArchInfo)
and VG_(machine_x86_have_mxcsr)
-------------
amd64: initially: call VG_(machine_get_hwcaps)
then safe to use VG_(machine_get_VexArchInfo)
-------------
ppc32: initially: call VG_(machine_get_hwcaps)
call VG_(machine_ppc32_set_clszB)
then safe to use VG_(machine_get_VexArchInfo)
and VG_(machine_ppc32_has_FP)
and VG_(machine_ppc32_has_VMX)
-------------
ppc64: initially: call VG_(machine_get_hwcaps)
call VG_(machine_ppc64_set_clszB)
then safe to use VG_(machine_get_VexArchInfo)
and VG_(machine_ppc64_has_VMX)
-------------
arm: initially: call VG_(machine_get_hwcaps)
call VG_(machine_arm_set_has_NEON)
then safe to use VG_(machine_get_VexArchInfo)
VG_(machine_get_hwcaps) may use signals (although it attempts to
leave signal state unchanged) and therefore should only be
called before m_main sets up the client's signal state.
*/
/* Determine what insn set and insn set variant the host has, and
record it. To be called once at system startup. Returns False if
this a CPU incapable of running Valgrind. */
extern Bool VG_(machine_get_hwcaps)( void );
/* Fetch host cpu info, as per above comment. */
extern void VG_(machine_get_VexArchInfo)( /*OUT*/VexArch*,
/*OUT*/VexArchInfo* );
/* Notify host cpu cache line size, as per above comment. */
#if defined(VGA_ppc32)
extern void VG_(machine_ppc32_set_clszB)( Int );
#endif
#if defined(VGA_ppc64)
extern void VG_(machine_ppc64_set_clszB)( Int );
#endif
#if defined(VGA_arm)
extern void VG_(machine_arm_set_has_NEON)( Bool );
#endif
/* X86: set to 1 if the host is able to do {ld,st}mxcsr (load/store
the SSE control/status register), else zero. Is referenced from
assembly code, so do not change from a 32-bit int. */
#if defined(VGA_x86)
extern UInt VG_(machine_x86_have_mxcsr);
#endif
/* PPC32: set to 1 if FP instructions are supported in user-space,
else 0. Is referenced from assembly code, so do not change from a
32-bit int. */
#if defined(VGA_ppc32)
extern UInt VG_(machine_ppc32_has_FP);
#endif
/* PPC32: set to 1 if Altivec instructions are supported in
user-space, else 0. Is referenced from assembly code, so do not
change from a 32-bit int. */
#if defined(VGA_ppc32)
extern UInt VG_(machine_ppc32_has_VMX);
#endif
/* PPC64: set to 1 if Altivec instructions are supported in
user-space, else 0. Is referenced from assembly code, so do not
change from a 64-bit int. */
#if defined(VGA_ppc64)
extern ULong VG_(machine_ppc64_has_VMX);
#endif
#if defined(VGA_arm)
extern Int VG_(machine_arm_archlevel);
#endif
#endif // __PUB_CORE_MACHINE_H
/*--------------------------------------------------------------------*/
/*--- end ---*/
/*--------------------------------------------------------------------*/
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