From 272b289859eff42d77fac6cf3125b38b0ff01791 Mon Sep 17 00:00:00 2001
From: Ulrich Drepper <drepper@redhat.com>
Date: Wed, 28 Dec 2005 19:13:20 +0000
Subject: [PATCH] * sysdeps/i386/__longjmp.S [PTR_DEMANGLE]: Also demangle
 stack

	pointer.  Add CFI.
	* sysdeps/i386/bsd-_setjmp.S [PTR_MANGLE]: Also mangle stack pointer.
	* sysdeps/i386/bsd-setjmp.S: Likewise.
	* sysdeps/i386/setjmp.S: Likewise.
---
 ChangeLog                  |  6 ++++++
 sysdeps/i386/__longjmp.S   | 32 ++++++++++++++++++++++++++++++--
 sysdeps/i386/bsd-_setjmp.S |  3 +++
 sysdeps/i386/bsd-setjmp.S  |  3 +++
 sysdeps/i386/setjmp.S      |  3 +++
 5 files changed, 45 insertions(+), 2 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 27e2ad4868..dfdb271974 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
 2005-12-28  Ulrich Drepper  <drepper@redhat.com>
 
+	* sysdeps/i386/__longjmp.S [PTR_DEMANGLE]: Also demangle stack
+	pointer.  Add CFI.
+	* sysdeps/i386/bsd-_setjmp.S [PTR_MANGLE]: Also mangle stack pointer.
+	* sysdeps/i386/bsd-setjmp.S: Likewise.
+	* sysdeps/i386/setjmp.S: Likewise.
+
 	* sysdeps/x86_64/__longjmp.S: No need to make sure return value is
 	!= 0, the caller did that.
 
diff --git a/sysdeps/i386/__longjmp.S b/sysdeps/i386/__longjmp.S
index aced5f42c9..10a4650fb0 100644
--- a/sysdeps/i386/__longjmp.S
+++ b/sysdeps/i386/__longjmp.S
@@ -32,6 +32,36 @@
 ENTRY (BP_SYM (__longjmp))
 	ENTER
 
+#ifdef PTR_DEMANGLE
+	movl JBUF(%esp), %eax	/* User's jmp_buf in %eax.  */
+	CHECK_BOUNDS_BOTH_WIDE (%eax, JBUF(%esp), $JB_SIZE)
+
+	/* Save the return address now.  */
+	movl (JB_PC*4)(%eax), %edx
+	/* Get the stack pointer.  */
+	movl (JB_SP*4)(%eax), %ecx
+	PTR_DEMANGLE (%edx)
+	PTR_DEMANGLE (%ecx)
+	cfi_def_cfa(%eax, 0)
+	cfi_register(%eip, %edx)
+	cfi_register(%esp, %ecx)
+	cfi_offset(%ebx, JB_BX*4)
+	cfi_offset(%esi, JB_SI*4)
+	cfi_offset(%edi, JB_DI*4)
+	cfi_offset(%ebp, JB_BP*4)
+     	/* Restore registers.  */
+	movl (JB_BX*4)(%eax), %ebx
+	movl (JB_SI*4)(%eax), %esi
+	movl (JB_DI*4)(%eax), %edi
+	movl (JB_BP*4)(%eax), %ebp
+	cfi_restore(%ebx)
+	cfi_restore(%esi)
+	cfi_restore(%edi)
+	cfi_restore(%ebp)
+
+	movl VAL(%esp), %eax	/* Second argument is return value.  */
+	movl %ecx, %esp
+#else
 	movl JBUF(%esp), %ecx	/* User's jmp_buf in %ecx.  */
 	CHECK_BOUNDS_BOTH_WIDE (%ecx, JBUF(%esp), $JB_SIZE)
 
@@ -44,8 +74,6 @@ ENTRY (BP_SYM (__longjmp))
 	movl (JB_DI*4)(%ecx), %edi
 	movl (JB_BP*4)(%ecx), %ebp
 	movl (JB_SP*4)(%ecx), %esp
-#ifdef PTR_DEMANGLE
-	PTR_DEMANGLE (%edx)
 #endif
 	/* Jump to saved PC.  */
      	jmp *%edx
diff --git a/sysdeps/i386/bsd-_setjmp.S b/sysdeps/i386/bsd-_setjmp.S
index f80d239323..99cc79160a 100644
--- a/sysdeps/i386/bsd-_setjmp.S
+++ b/sysdeps/i386/bsd-_setjmp.S
@@ -44,6 +44,9 @@ ENTRY (BP_SYM (_setjmp))
 	movl %esi, (JB_SI*4)(%edx)
 	movl %edi, (JB_DI*4)(%edx)
 	leal JMPBUF(%esp), %ecx	/* Save SP as it will be after we return.  */
+#ifdef PTR_MANGLE
+	PTR_MANGLE (%ecx)
+#endif
      	movl %ecx, (JB_SP*4)(%edx)
 	movl PCOFF(%esp), %ecx	/* Save PC we are returning to now.  */
 #ifdef PTR_MANGLE
diff --git a/sysdeps/i386/bsd-setjmp.S b/sysdeps/i386/bsd-setjmp.S
index f4257a0dc5..02c76a8c79 100644
--- a/sysdeps/i386/bsd-setjmp.S
+++ b/sysdeps/i386/bsd-setjmp.S
@@ -46,6 +46,9 @@ ENTRY (BP_SYM (setjmp))
 	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.  */
+#ifdef PTR_MANGLE
+	PTR_MANGLE (%ecx)
+#endif
      	movl %ecx, (JB_SP*4)(%eax)
 	movl PCOFF(%esp), %ecx	/* Save PC we are returning to now.  */
 #ifdef PTR_MANGLE
diff --git a/sysdeps/i386/setjmp.S b/sysdeps/i386/setjmp.S
index 747499adc2..94dcbf2e1f 100644
--- a/sysdeps/i386/setjmp.S
+++ b/sysdeps/i386/setjmp.S
@@ -40,6 +40,9 @@ ENTRY (BP_SYM (__sigsetjmp))
 	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.  */
+#ifdef PTR_MANGLE
+	PTR_MANGLE (%ecx)
+#endif
      	movl %ecx, (JB_SP*4)(%eax)
 	movl PCOFF(%esp), %ecx	/* Save PC we are returning to now.  */
 #ifdef PTR_MANGLE