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-rw-r--r--sysdeps/i386/elf/bsd-setjmp.S78
1 files changed, 78 insertions, 0 deletions
diff --git a/sysdeps/i386/elf/bsd-setjmp.S b/sysdeps/i386/elf/bsd-setjmp.S
new file mode 100644
index 0000000000..72a85b18e1
--- /dev/null
+++ b/sysdeps/i386/elf/bsd-setjmp.S
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+/* BSD `setjmp' entry point to `sigsetjmp (..., 1)'. i386 version.
+ Copyright (C) 1995-1997,2000,2001,2002,2003 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. */
+
+#include <sysdep.h>
+#define _ASM
+#define _SETJMP_H
+#include <bits/setjmp.h>
+#include "bp-sym.h"
+#include "bp-asm.h"
+
+#define PARMS LINKAGE /* no space for saved regs */
+#define JMPBUF PARMS
+#define SIGMSK JMPBUF+PTR_SIZE
+
+ENTRY (BP_SYM (setjmp))
+ /* Note that we have to use a non-exported symbol in the next
+ jump since otherwise gas will emit it as a jump through the
+ PLT which is what we cannot use here. */
+ ENTER
+
+ movl JMPBUF(%esp), %eax
+ CHECK_BOUNDS_BOTH_WIDE (%eax, JMPBUF(%esp), $JB_SIZE)
+
+ /* Save registers. */
+ movl %ebx, (JB_BX*4)(%eax)
+ movl %esi, (JB_SI*4)(%eax)
+ movl %edi, (JB_DI*4)(%eax)
+ leal JMPBUF(%esp), %ecx /* Save SP as it will be after we return. */
+ movl %ecx, (JB_SP*4)(%eax)
+ movl PCOFF(%esp), %ecx /* Save PC we are returning to now. */
+ movl %ecx, (JB_PC*4)(%eax)
+ LEAVE /* pop frame pointer to prepare for tail-call. */
+ movl %ebp, (JB_BP*4)(%eax) /* Save caller's frame pointer. */
+
+ /* Call __sigjmp_save. */
+ pushl $1
+ pushl 8(%esp)
+#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 __i686.get_pc_thunk.cx
+ addl $_GLOBAL_OFFSET_TABLE_, %ecx
+ leal C_SYMBOL_NAME (BP_SYM (__sigjmp_save)@GOTOFF)(%ecx), %ecx
+ call *%ecx
+#else
+ call BP_SYM (__sigjmp_save)
+#endif
+ popl %ecx
+ popl %edx
+ ret
+END (BP_SYM (setjmp))
+
+ .section .gnu.linkonce.t.__i686.get_pc_thunk.cx,"ax",@progbits
+ .globl __i686.get_pc_thunk.cx
+ .hidden __i686.get_pc_thunk.cx
+ .type __i686.get_pc_thunk.cx,@function
+__i686.get_pc_thunk.cx:
+ movl (%esp), %ecx
+ ret
+ .size __i686.get_pc_thunk.cx, . - __i686.get_pc_thunk.cx