diff options
author | David M. Lee <dlee@digium.com> | 2013-01-07 14:24:28 -0600 |
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committer | David M. Lee <dlee@digium.com> | 2013-01-07 14:24:28 -0600 |
commit | f3ab456a17af1c89a6e3be4d20c5944853df1cb0 (patch) | |
tree | d00e1a332cd038a6d906a1ea0ac91e1a4458e617 /pjlib/src/pj/compat/setjmp_i386.S |
Import pjproject-2.0.1
Diffstat (limited to 'pjlib/src/pj/compat/setjmp_i386.S')
-rw-r--r-- | pjlib/src/pj/compat/setjmp_i386.S | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/pjlib/src/pj/compat/setjmp_i386.S b/pjlib/src/pj/compat/setjmp_i386.S new file mode 100644 index 0000000..9cdaaff --- /dev/null +++ b/pjlib/src/pj/compat/setjmp_i386.S @@ -0,0 +1,61 @@ +/* setjmp for i386, ELF version. + Copyright (C) 1995, 1996, 1997, 2000, 2001 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 Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#define _ASM +#define _SETJMP_H +#define PJ_LINUX_KERNEL 1 +#include <pj/compat/setjmp.h> + + +.global __sigsetjmp +.type __sigsetjmp,%function +.align 4 + +__sigsetjmp: + movl 4 (%esp), %eax + /* Save registers. */ + movl %ebx, (0 *4)(%eax) + movl %esi, (1 *4)(%eax) + movl %edi, (2 *4)(%eax) + /* Save SP as it will be after we return. */ + leal 4(%esp), %ecx + movl %ecx, (4 *4)(%eax) + /* Save PC we are returning to now. */ + movl 0(%esp), %ecx + movl %ecx, (5 *4)(%eax) + /* Save caller's frame pointer. */ + movl %ebp, (3 *4)(%eax) + + /* Make a tail call to __sigjmp_save; it takes the same args. */ +#ifdef __PIC__ + /* We cannot use the PLT, because it requires that %ebx be set, but + we can't save and restore our caller's value. Instead, we do an + indirect jump through the GOT, using for the temporary register + %ecx, which is call-clobbered. */ + call .Lhere +.Lhere: + popl %ecx + addl $_GLOBAL_OFFSET_TABLE_+[.- .Lhere ], %ecx + movl __sigjmp_save @GOT (%ecx), %ecx + jmp *%ecx +#else + jmp __sigjmp_save +#endif +.size __sigsetjmp,.-__sigsetjmp + |