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https://github.com/Zenithsiz/ftmemsim-valgrind.git
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9d7b4d9ae2
amd64 version is broken again. Writing code with undocumented assumptions should be a firable offense. At the very least. git-svn-id: svn://svn.valgrind.org/valgrind/trunk@3402
97 lines
2.9 KiB
C
97 lines
2.9 KiB
C
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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 "ume.h"
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#define ZERO_ALL_INT_REGS \
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" movl $0, %eax\n" \
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" movl $0, %ebx\n" \
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" movl $0, %ecx\n" \
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" movl $0, %edx\n" \
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" movl $0, %esi\n" \
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" movl $0, %edi\n" \
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" movl $0, %ebp\n"
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/* Jump to 'dst', but first set the stack pointer to 'stack'. Also,
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clear all the integer registers before entering 'dst'. It's
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important that the stack pointer is set to exactly 'stack' and not
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(eg) stack - apparently_harmless_looking_small_offset. Basically
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because the code at 'dst' might be wanting to scan the area above
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'stack' (viz, the auxv array), and putting spurious words on the
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stack confuses it.
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*/
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/*
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__attribute__((noreturn))
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void jump_and_switch_stacks ( Addr stack, Addr dst );
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4(%esp) == stack
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8(%esp) == f
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*/
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asm(
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".global jump_and_switch_stacks\n"
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"jump_and_switch_stacks:\n"
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" movl %esp, %esi\n" /* remember old stack pointer */
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" movl 4(%esi), %esp\n" /* set stack */
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" pushl 8(%esi)\n" /* f to stack*/
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ZERO_ALL_INT_REGS
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" ret\n" /* jump to f */
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" ud2\n" /* should never get here */
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);
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/* Call f(arg1), but first switch stacks, using 'stack' as the new
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stack, and use 'retaddr' as f's return-to address. Also, clear all
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the integer registers before entering f.*/
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/*
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__attribute__((noreturn))
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void call_on_new_stack_0_1 ( Addr stack,
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Addr retaddr,
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void (*f)(Word),
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Word arg1 );
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4(%esp) == stack
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8(%esp) == retaddr
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12(%esp) == f
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16(%esp) == arg1
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*/
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asm(
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".global call_on_new_stack_0_1\n"
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"call_on_new_stack_0_1:\n"
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" movl %esp, %esi\n" /* remember old stack pointer */
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" movl 4(%esi), %esp\n" /* set stack */
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" pushl 16(%esi)\n" /* arg1 to stack */
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" pushl 8(%esi)\n" /* retaddr to stack */
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" pushl 12(%esi)\n" /* f to stack */
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ZERO_ALL_INT_REGS
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" ret\n" /* jump to f */
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" ud2\n" /* should never get here */
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);
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#undef ZERO_ALL_INT_REGS
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