| Benny Prijono | 0a749f1 | 2005-10-31 21:02:30 +0000 | [diff] [blame^] | 1 | /* setjmp for i386, ELF version.
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| 2 | Copyright (C) 1995, 1996, 1997, 2000, 2001 Free Software Foundation, Inc.
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| 3 | This file is part of the GNU C Library.
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| 4 |
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| 5 | The GNU C Library is free software; you can redistribute it and/or
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| 6 | modify it under the terms of the GNU Lesser General Public
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| 7 | License as published by the Free Software Foundation; either
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| 8 | version 2.1 of the License, or (at your option) any later version.
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| 9 |
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| 10 | The GNU C Library is distributed in the hope that it will be useful,
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 13 | Lesser General Public License for more details.
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| 14 |
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| 15 | You should have received a copy of the GNU Lesser General Public
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| 16 | License along with the GNU C Library; if not, write to the Free
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| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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| 18 | 02111-1307 USA. */
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| 19 |
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| 20 | #define _ASM
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| 21 | #define _SETJMP_H
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| 22 | #define PJ_LINUX_KERNEL 1
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| 23 | #include <pj/compat/setjmp.h>
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| 24 |
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| 25 |
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| 26 | .global __sigsetjmp
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| 27 | .type __sigsetjmp,%function
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| 28 | .align 4
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| 29 |
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| 30 | __sigsetjmp:
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| 31 | movl 4 (%esp), %eax
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| 32 | /* Save registers. */
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| 33 | movl %ebx, (0 *4)(%eax)
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| 34 | movl %esi, (1 *4)(%eax)
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| 35 | movl %edi, (2 *4)(%eax)
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| 36 | /* Save SP as it will be after we return. */
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| 37 | leal 4(%esp), %ecx
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| 38 | movl %ecx, (4 *4)(%eax)
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| 39 | /* Save PC we are returning to now. */
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| 40 | movl 0(%esp), %ecx
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| 41 | movl %ecx, (5 *4)(%eax)
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| 42 | /* Save caller's frame pointer. */
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| 43 | movl %ebp, (3 *4)(%eax)
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| 44 |
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| 45 | /* Make a tail call to __sigjmp_save; it takes the same args. */
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| 46 | #ifdef __PIC__
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| 47 | /* We cannot use the PLT, because it requires that %ebx be set, but
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| 48 | we can't save and restore our caller's value. Instead, we do an
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| 49 | indirect jump through the GOT, using for the temporary register
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| 50 | %ecx, which is call-clobbered. */
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| 51 | call .Lhere
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| 52 | .Lhere:
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| 53 | popl %ecx
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| 54 | addl $_GLOBAL_OFFSET_TABLE_+[.- .Lhere ], %ecx
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| 55 | movl __sigjmp_save @GOT (%ecx), %ecx
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| 56 | jmp *%ecx
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| 57 | #else
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| 58 | jmp __sigjmp_save
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| 59 | #endif
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| 60 | .size __sigsetjmp,.-__sigsetjmp
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| 61 |
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