1 /* BSD `_setjmp' entry point to `sigsetjmp (..., 0)'. i386 version.
2 Copyright (C) 1994-1997,2000-2002,2005, 2006 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
20 /* This just does a tail-call to `__sigsetjmp (ARG, 0)'.
21 We cannot do it in C because it must be a tail-call, so frame-unwinding
22 in setjmp doesn't clobber the state restored by longjmp. */
25 #include <jmpbuf-offsets.h>
29 #define PARMS LINKAGE /* no space for saved regs */
31 #define SIGMSK JMPBUF+PTR_SIZE
33 ENTRY (BP_SYM (_setjmp))
37 movl JMPBUF(%esp), %edx
38 CHECK_BOUNDS_BOTH_WIDE (%edx, JMPBUF(%esp), $(JB_SIZE+4))
41 movl %ebx, (JB_BX*4)(%edx)
42 movl %esi, (JB_SI*4)(%edx)
43 movl %edi, (JB_DI*4)(%edx)
44 leal JMPBUF(%esp), %ecx /* Save SP as it will be after we return. */
48 movl %ecx, (JB_SP*4)(%edx)
49 movl PCOFF(%esp), %ecx /* Save PC we are returning to now. */
53 movl %ecx, (JB_PC*4)(%edx)
55 movl %ebp, (JB_BP*4)(%edx) /* Save caller's frame pointer. */
57 movl %eax, JB_SIZE(%edx) /* No signal mask set. */
59 END (BP_SYM (_setjmp))
60 libc_hidden_def (_setjmp)