[x32] PATCH: Properly save the x32 new stack boundary

[H.J. Lu]

Hi,

I checked in this patch to properly save the x32 new stack boundary.


H.J.
---
commit 556b6e068c17f0b5775140c29cd5323014775b37
Author: H.J. Lu <hjl.to...@gmail.com>
Date:   Tue Mar 15 18:00:01 2011 -0700

    Properly save the x32 new stack boundary.

diff --git a/libgcc/ChangeLog.x32 b/libgcc/ChangeLog.x32
index d980b39..2fc9d48 100644
--- a/libgcc/ChangeLog.x32
+++ b/libgcc/ChangeLog.x32
@@ -1,3 +1,8 @@
+2011-03-15  H.J. Lu  <hongjiu...@intel.com>
+
+       * config/i386/morestack.S: Properly save the x32 new stack
+       boundary.
+
 2011-02-14  H.J. Lu  <hongjiu...@intel.com>
 
        * config/i386/morestack.S: Replace __LP64___ with __LP64__.
diff --git a/libgcc/config/i386/morestack.S b/libgcc/config/i386/morestack.S
index 4496e3d..70a6e94 100644
--- a/libgcc/config/i386/morestack.S
+++ b/libgcc/config/i386/morestack.S
@@ -354,7 +354,11 @@ __morestack:
        # FIXME: The offset must match
        # TARGET_THREAD_SPLIT_STACK_OFFSET in
        # gcc/config/i386/linux64.h.
+#ifdef __LP64__
        movq    %rax,%fs:0x70           # Save the new stack boundary.
+#else
+       movl    %eax,%fs:0x40           # Save the new stack boundary.
+#endif
 
        call    __morestack_unblock_signals
 
@@ -392,7 +396,11 @@ __morestack:
        subq    0(%rsp),%rax            # Subtract available space.
        addq    $BACKOFF,%rax           # Back off 1024 bytes.
 .LEHE0:
+#ifdef __LP64__
        movq    %rax,%fs:0x70           # Save the new stack boundary.
+#else
+       movl    %eax,%fs:0x40           # Save the new stack boundary.
+#endif
 
        addq    $16,%rsp                # Remove values from stack.
 
@@ -434,7 +442,11 @@ __morestack:
        movq    %rbp,%rcx               # Get the stack pointer.
        subq    %rax,%rcx               # Subtract available space.
        addq    $BACKOFF,%rcx           # Back off 1024 bytes.
+#ifdef __LP64__
        movq    %rcx,%fs:0x70           # Save new stack boundary.
+#else
+       movl    %ecx,%fs:0x40           # Save new stack boundary.
+#endif
        movq    (%rsp),%rdi             # Restore exception data for call.
 #ifdef __PIC__
        call    _Unwind_Resume@PLT      # Resume unwinding.
@@ -554,7 +566,11 @@ __stack_split_initialize:
 #else /* defined(__x86_64__) */
 
        leaq    -16000(%rsp),%rax       # We should have at least 16K.
+#ifdef __LP64__
        movq    %rax,%fs:0x70
+#else
+       movl    %eax,%fs:0x40
+#endif
        movq    %rsp,%rdi
        movq    $16000,%rsi
 #ifdef __PIC__