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Diffstat (limited to 'libc/sysdeps/linux/i386/bsd-_setjmp.S')
-rw-r--r--libc/sysdeps/linux/i386/bsd-_setjmp.S51
1 files changed, 51 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/i386/bsd-_setjmp.S b/libc/sysdeps/linux/i386/bsd-_setjmp.S
new file mode 100644
index 000000000..73d90eb4e
--- /dev/null
+++ b/libc/sysdeps/linux/i386/bsd-_setjmp.S
@@ -0,0 +1,51 @@
+/* BSD `_setjmp' entry point to `sigsetjmp (..., 0)'. i386 version.
+ Copyright (C) 1994,1995,1996,1997,2000,2001 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. */
+
+/* This just does a tail-call to `__sigsetjmp (ARG, 0)'.
+ We cannot do it in C because it must be a tail-call, so frame-unwinding
+ in setjmp doesn't clobber the state restored by longjmp. */
+
+#define _ASM
+#define _SETJMP_H
+#include <bits/setjmp.h>
+
+
+.globl _setjmp;
+.type _setjmp,@function
+.align 4;
+
+_setjmp:
+ xorl %eax, %eax
+ movl 4 (%esp), %edx
+
+ /* Save registers. */
+ movl %ebx, (JB_BX*4)(%edx)
+ movl %esi, (JB_SI*4)(%edx)
+ movl %edi, (JB_DI*4)(%edx)
+ leal 4 (%esp), %ecx /* Save SP as it will be after we return. */
+ movl %ecx, (JB_SP*4)(%edx)
+ movl 0 (%esp), %ecx /* Save PC we are returning to now. */
+ movl %ecx, (JB_PC*4)(%edx)
+ movl %ebp, (JB_BP*4)(%edx) /* Save caller's frame pointer. */
+
+ movl %eax, JB_SIZE(%edx) /* No signal mask set. */
+ ret
+.size _setjmp,.-_setjmp;
+
+