mirror of
https://github.com/Zenithsiz/ftmemsim-valgrind.git
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7942c92bd6
- removed some assumptions that arch==x86 in Makefile.am files - removed ume_arch.h; moved its contents into ume.h. There was no need for these to be separate. - moved ume_go.c into an x86/ subdir; gave it the more meaningful name jmp_with_stack.c in the process (the corresponding function also got the name change) git-svn-id: svn://svn.valgrind.org/valgrind/trunk@2757
52 lines
1.6 KiB
C
52 lines
1.6 KiB
C
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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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#include "ume.h"
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/*
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Jump to a particular IP with a particular SP. This is intended
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to simulate the initial CPU state when the kernel starts an program
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after exec; it therefore also clears all the other registers.
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*/
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void jmp_with_stack(addr_t eip, addr_t esp)
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{
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asm volatile ("movl %1, %%esp;" /* set esp */
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"pushl %%eax;" /* push esp */
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"xorl %%eax,%%eax;" /* clear registers */
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"xorl %%ebx,%%ebx;"
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"xorl %%ecx,%%ecx;"
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"xorl %%edx,%%edx;"
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"xorl %%esi,%%esi;"
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"xorl %%edi,%%edi;"
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"xorl %%ebp,%%ebp;"
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"ret" /* return into entry */
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: : "a" (eip), "r" (esp));
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/* we should never get here */
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for(;;)
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asm volatile("ud2");
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}
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