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https://github.com/Zenithsiz/ftmemsim-valgrind.git
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10b4595add
It compiles, but aborts immediately if you try to run it.
I didn't include ldt.c; I'm not sure how the LDT is used on AMD64. It can be
added later if necessary.
While doing this, did some 64-bit cleanness fixes:
- Added necessary intermediate casts to ULong to avoid warnings when converting
ThreadId to void* and vice versa, in vg_scheduler.c.
- Fixed VALGRIND_NON_SIMD_CALL[0123] to use 'long' as the return type.
- Fixed VALGRIND_PRINTF{,BACKTRACE} to use unsigned longs instead of unsigned
ints, as needed.
- Converted some offsets in vg_symtab2.h from "Int" to "OffT".
- Made strlen, strncat, etc, use SizeT instead of 'unsigned int' for the length
parameter.
- Couple of other minor things.
I had to insert some "#ifdef __amd64__" and "#ifndef __amd64__" guards in
places. In particular, in vg_mylibc.c, some of our syscall wrappers aren't
appropriate for AMD64 because the syscall numbering is a bit different in
places. This difference will have to be abstracted out somehow.
Also rewrote the sys_fcntl and sys_fcntl64 wrappers, as required for AMD64.
Also moved the ipc wrapper into x86, since it's not applicable for
AMD64. However, it is applicable (I think) for ARM, so it would be nice
to work out a way to share syscall wrappers between some, but not all,
archs. Hmm. Also now using the real IPC constants rather than magic
numbers in the wrapper.
Other non-AMD64-related fixes:
- ARM: fixed syscall table by accounting for the fact that syscall
numbers don't start at 0, but rather at 0x900000.
- Converted a few places to use ThreadId instead of 'int' or 'Int' for
thread IDs.
- Added both AMD64 and ARM (which I'd forgotten) entries to valgrind.spec.in.
- Tweaked comments in various places.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@3136
94 lines
3.0 KiB
ArmAsm
94 lines
3.0 KiB
ArmAsm
##--------------------------------------------------------------------##
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##--- Support routines for the JITter output. amd64/helpers.S ---##
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##--------------------------------------------------------------------##
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/*
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This file is part of Valgrind, an extensible x86 protected-mode
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emulator for monitoring program execution on x86-Unixes.
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Copyright (C) 2000-2004 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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#if 0
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#include "core_asm.h"
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/* ------------------ SIMULATED CPU HELPERS ------------------ */
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/* A stubs for a return which we want to catch: a signal return.
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returns and pthread returns. In the latter case, the thread's
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return value is in %EAX, so we pass this as the first argument
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to the request. In both cases we use the user request mechanism.
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You need to to read the definition of VALGRIND_MAGIC_SEQUENCE
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in valgrind.h to make sense of this.
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This isn't used in-place. It is copied into the client address space
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at an arbitary address. Therefore, this code must be completely
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position-independent.
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*/
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.global VG_(trampoline_code_start)
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.global VG_(trampoline_code_length)
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.global VG_(tramp_sigreturn_offset)
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.global VG_(tramp_syscall_offset)
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VG_(trampoline_code_start):
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sigreturn_start:
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subl $20, %esp # allocate arg block
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movl %esp, %edx # %edx == &_zzq_args[0]
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movl $VG_USERREQ__SIGNAL_RETURNS, 0(%edx) # request
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movl $0, 4(%edx) # arg1
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movl $0, 8(%edx) # arg2
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movl $0, 12(%edx) # arg3
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movl $0, 16(%edx) # arg4
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movl %edx, %eax
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# and now the magic sequence itself:
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roll $29, %eax
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roll $3, %eax
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rorl $27, %eax
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rorl $5, %eax
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roll $13, %eax
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roll $19, %eax
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# should never get here
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ud2
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# We can point our sysinfo stuff here
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.align 16
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syscall_start:
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int $0x80
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ret
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tramp_code_end:
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.data
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VG_(trampoline_code_length):
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.long tramp_code_end - VG_(trampoline_code_start)
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VG_(tramp_sigreturn_offset):
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.long sigreturn_start - VG_(trampoline_code_start)
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VG_(tramp_syscall_offset):
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.long syscall_start - VG_(trampoline_code_start)
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.text
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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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#endif
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##--------------------------------------------------------------------##
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##--- end ---##
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##--------------------------------------------------------------------##
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