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| author | Roland McGrath <roland@gnu.org> | 1995-08-31 17:33:01 +0000 |
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| committer | Roland McGrath <roland@gnu.org> | 1995-08-31 17:33:01 +0000 |
| commit | e3726b056b3b1cfde7019e29d5d3c50ce70e08e9 (patch) | |
| tree | 97695fe42ef6e492efc0d3b728218746d4ccae7e /sysdeps/i386/__longjmp.S | |
| parent | a993273c0d4d1907028adee7a2ae012826fd316c (diff) | |
| download | glibc-e3726b056b3b1cfde7019e29d5d3c50ce70e08e9.zip glibc-e3726b056b3b1cfde7019e29d5d3c50ce70e08e9.tar.gz glibc-e3726b056b3b1cfde7019e29d5d3c50ce70e08e9.tar.bz2 | |
Rewrote i386 setjmp in assembly.
Thu Aug 31 13:23:35 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
* sysdeps/unix/i386/brk.S [PIC]: Set __curbrk through the GOT.
Rewrote i386 setjmp code in assembly, so as to avoid fighting
with the compiler for the register values.
* sysdeps/i386/setjmp.S, sysdeps/i386/__longjmp.S: New files.
* sysdeps/i386/setjmp.c, sysdeps/i386/__longjmp.c: Files removed.
* sysdeps/i386/jmp_buf.h [! _ASM] (__jmp_buf): Define as array of ints.
[__USE_MISC || _ASM] (JB_*): New macros, for indices therein.
(_JMPBUF_UNWINDS): Use JB_SP.
Diffstat (limited to 'sysdeps/i386/__longjmp.S')
| -rw-r--r-- | sysdeps/i386/__longjmp.S | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/sysdeps/i386/__longjmp.S b/sysdeps/i386/__longjmp.S new file mode 100644 index 0000000..f546622 --- /dev/null +++ b/sysdeps/i386/__longjmp.S @@ -0,0 +1,35 @@ +/* longjmp for i386. +Copyright (C) 1995 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library 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 +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <sysdep.h> +#define _ASM +#include <jmp_buf.h> + +ENTRY (__longjmp) + movl 4(%esp), %ecx /* User's jmp_buf in %ecx. */ + movl 8(%esp), %eax /* Second argument is return value. */ + /* Restore registers. */ + movl JB_BX(%ecx), %ebx + movl JB_SI(%ecx), %esi + movl JB_DI(%ecx), %edi + movl JB_BP(%ecx), %ebp + movl JB_SP(%ecx), %esp + /* Jump to saved PC. */ + movl JB_PC(%ecx), %ecx + jmp *%ecx |