1 /* BSD `_setjmp' entry point to `sigsetjmp (..., 0)'. i386 version.
2 Copyright (C) 1994,1995,1996,1997,2000,2001 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 Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 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 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
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. */
27 #include <bits/setjmp.h>
31 #define PARMS LINKAGE /* no space for saved regs */
33 #define SIGMSK JMPBUF+PTR_SIZE
35 ENTRY (BP_SYM (_setjmp))
39 movl JMPBUF(%esp), %edx
40 CHECK_BOUNDS_BOTH_WIDE (%edx, JMPBUF(%esp), $(JB_SIZE+4))
43 movl %ebx, (JB_BX*4)(%edx)
44 movl %esi, (JB_SI*4)(%edx)
45 movl %edi, (JB_DI*4)(%edx)
46 leal JMPBUF(%esp), %ecx /* Save SP as it will be after we return. */
47 movl %ecx, (JB_SP*4)(%edx)
48 movl PCOFF(%esp), %ecx /* Save PC we are returning to now. */
49 movl %ecx, (JB_PC*4)(%edx)
51 movl %ebp, (JB_BP*4)(%edx) /* Save caller's frame pointer. */
53 movl %eax, JB_SIZE(%edx) /* No signal mask set. */
55 END (BP_SYM (_setjmp))