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From: unknown author <unknown.author@example.com>
Date: Tue, 1 Nov 2011 18:58:26 +0100
Subject: [PATCH] i386/x86_64 revert clone cfi
revert cfi additions to clone on i386/x86_64 to workaround problems in
gcc's unwinder code. this is not a bug in glibc, it triggers problems
elsewhere. this cfi code does not gain us a whole lot anyways.
http://gcc.gnu.org/ml/gcc/2006-12/msg00293.html
---
sysdeps/unix/sysv/linux/i386/clone.S | 4 ----
sysdeps/unix/sysv/linux/x86_64/clone.S | 4 ----
2 files changed, 8 deletions(-)
diff --git a/sysdeps/unix/sysv/linux/i386/clone.S b/sysdeps/unix/sysv/linux/i386/clone.S
index 0603218..82c6536 100644
--- a/sysdeps/unix/sysv/linux/i386/clone.S
+++ b/sysdeps/unix/sysv/linux/i386/clone.S
@@ -119,9 +119,6 @@ L(pseudo_end):
ret
L(thread_start):
- cfi_startproc;
- /* Clearing frame pointer is insufficient, use CFI. */
- cfi_undefined (eip);
/* Note: %esi is zero. */
movl %esi,%ebp /* terminate the stack frame */
#ifdef RESET_PID
@@ -154,7 +151,6 @@ L(nomoregetpid):
jmp L(haspid)
.previous
#endif
- cfi_endproc;
cfi_startproc
PSEUDO_END (BP_SYM (__clone))
diff --git a/sysdeps/unix/sysv/linux/x86_64/clone.S b/sysdeps/unix/sysv/linux/x86_64/clone.S
index 6bcb542..656b389 100644
--- a/sysdeps/unix/sysv/linux/x86_64/clone.S
+++ b/sysdeps/unix/sysv/linux/x86_64/clone.S
@@ -88,9 +88,6 @@ L(pseudo_end):
ret
L(thread_start):
- cfi_startproc;
- /* Clearing frame pointer is insufficient, use CFI. */
- cfi_undefined (rip);
/* Clear the frame pointer. The ABI suggests this be done, to mark
the outermost frame obviously. */
xorl %ebp, %ebp
@@ -115,7 +112,6 @@ L(thread_start):
/* Call exit with return value from function call. */
movq %rax, %rdi
call HIDDEN_JUMPTARGET (_exit)
- cfi_endproc;
cfi_startproc;
PSEUDO_END (BP_SYM (__clone))
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