From 666af3799bde3138ec31177e77129e9dced2ab37 Mon Sep 17 00:00:00 2001
From: Ulrich Drepper <drepper@redhat.com>
Date: Tue, 16 Jan 2001 23:10:00 +0000
Subject: (setjmp): Don't use __sigsetjmp code, do it here. (_setjmp):
 Likewise.

---
 sysdeps/i386/elf/setjmp.S | 65 ++++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 56 insertions(+), 9 deletions(-)

(limited to 'sysdeps')

diff --git a/sysdeps/i386/elf/setjmp.S b/sysdeps/i386/elf/setjmp.S
index 9cfa83dc31..c64c9ea696 100644
--- a/sysdeps/i386/elf/setjmp.S
+++ b/sysdeps/i386/elf/setjmp.S
@@ -1,5 +1,5 @@
 /* setjmp for i386, ELF version.
-   Copyright (C) 1995, 1996, 1997, 2000 Free Software Foundation, Inc.
+   Copyright (C) 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
@@ -24,28 +24,75 @@
 #include "bp-sym.h"
 #include "bp-asm.h"
 
+#define PARMS	LINKAGE		/* no space for saved regs */
+#define JMPBUF	PARMS
+#define SIGMSK	JMPBUF+PTR_SIZE
+
 	/* We include the BSD entry points here as well but we make
 	   them weak.  */
 ENTRY (BP_SYM (setjmp))
 	.weak C_SYMBOL_NAME (BP_SYM (setjmp))
-	PUSH_SIGNAL_MASK (1)
 	/* 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.  */
-	jmp .Linternal_sigsetjmp
+	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 here2
+here2:	popl %ecx
+	addl $_GLOBAL_OFFSET_TABLE_+[.-here2], %ecx
+	movl C_SYMBOL_NAME (BP_SYM (__sigjmp_save)@GOT)(%ecx), %ecx
+	call *%ecx
+#else
+	call BP_SYM (__sigjmp_save)
+#endif
+	popl %ecx
+	popl %edx
+	ret
 END (BP_SYM (setjmp))
 
 ENTRY (BP_SYM (_setjmp))
 	.weak C_SYMBOL_NAME (BP_SYM (_setjmp))
-	PUSH_SIGNAL_MASK (0)
-	/* FALL THROUGH */
+	ENTER
 
-#define PARMS	LINKAGE		/* no space for saved regs */
-#define JMPBUF	PARMS
-#define SIGMSK	JMPBUF+PTR_SIZE
+	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
+	movl %ebp, (JB_BP*4)(%eax) /* Save caller's frame pointer.  */
+	ret
+END (BP_SYM (_setjmp))
 
 ENTRY (BP_SYM (__sigsetjmp))
-.Linternal_sigsetjmp = BP_SYM (__sigsetjmp)
 	ENTER
 
 	movl JMPBUF(%esp), %eax
-- 
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