yann@1365: Original patch from: gentoo/src/patchsets/glibc/2.9/0070_all_glibc-i386-x86_64-revert-clone-cfi.patch
yann@1365: 
yann@1365: -= BEGIN original header =-
yann@1365: revert cfi additions to clone on i386/x86_64 to workaround problems in
yann@1365: gcc's unwinder code.  this is not a bug in glibc, it triggers problems
yann@1365: elsewhere.  this cfi code does not gain us a whole lot anyways.
yann@1365: 
yann@1365: http://gcc.gnu.org/ml/gcc/2006-12/msg00293.html
yann@1365: 
yann@1365: -= END original header =-
yann@1365: 
yann@1365: diff -durN glibc-2_9.orig/sysdeps/unix/sysv/linux/i386/clone.S glibc-2_9/sysdeps/unix/sysv/linux/i386/clone.S
yann@1365: --- glibc-2_9.orig/sysdeps/unix/sysv/linux/i386/clone.S	2006-12-04 00:12:36.000000000 +0100
yann@1365: +++ glibc-2_9/sysdeps/unix/sysv/linux/i386/clone.S	2009-02-02 22:00:45.000000000 +0100
yann@1365: @@ -120,9 +120,6 @@
yann@1365:  	ret
yann@1365:  
yann@1365:  L(thread_start):
yann@1365: -	cfi_startproc;
yann@1365: -	/* Clearing frame pointer is insufficient, use CFI.  */
yann@1365: -	cfi_undefined (eip);
yann@1365:  	/* Note: %esi is zero.  */
yann@1365:  	movl	%esi,%ebp	/* terminate the stack frame */
yann@1365:  #ifdef RESET_PID
yann@1365: @@ -155,7 +152,6 @@
yann@1365:  	jmp	L(haspid)
yann@1365:  	.previous
yann@1365:  #endif
yann@1365: -	cfi_endproc;
yann@1365:  
yann@1365:  	cfi_startproc
yann@1365:  PSEUDO_END (BP_SYM (__clone))
yann@1365: diff -durN glibc-2_9.orig/sysdeps/unix/sysv/linux/x86_64/clone.S glibc-2_9/sysdeps/unix/sysv/linux/x86_64/clone.S
yann@1365: --- glibc-2_9.orig/sysdeps/unix/sysv/linux/x86_64/clone.S	2006-12-04 00:12:36.000000000 +0100
yann@1365: +++ glibc-2_9/sysdeps/unix/sysv/linux/x86_64/clone.S	2009-02-02 22:00:45.000000000 +0100
yann@1365: @@ -89,9 +89,6 @@
yann@1365:  	ret
yann@1365:  
yann@1365:  L(thread_start):
yann@1365: -	cfi_startproc;
yann@1365: -	/* Clearing frame pointer is insufficient, use CFI.  */
yann@1365: -	cfi_undefined (rip);
yann@1365:  	/* Clear the frame pointer.  The ABI suggests this be done, to mark
yann@1365:  	   the outermost frame obviously.  */
yann@1365:  	xorl	%ebp, %ebp
yann@1365: @@ -116,7 +113,6 @@
yann@1365:  	/* Call exit with return value from function call. */
yann@1365:  	movq	%rax, %rdi
yann@1365:  	call	HIDDEN_JUMPTARGET (_exit)
yann@1365: -	cfi_endproc;
yann@1365:  
yann@1365:  	cfi_startproc;
yann@1365:  PSEUDO_END (BP_SYM (__clone))