yann@2437: revert cfi additions to clone on i386/x86_64 to workaround problems in
yann@2437: gcc's unwinder code.  this is not a bug in glibc, it triggers problems
yann@2437: elsewhere.  this cfi code does not gain us a whole lot anyways.
yann@2437: 
yann@2437: http://gcc.gnu.org/ml/gcc/2006-12/msg00293.html
yann@2437: 
yann@2437: Index: sysdeps/unix/sysv/linux/i386/clone.S
yann@2437: ===================================================================
yann@2437: RCS file: /cvs/glibc/libc/sysdeps/unix/sysv/linux/i386/clone.S,v
yann@2437: retrieving revision 1.27
yann@2437: retrieving revision 1.26
yann@2437: diff -u -p -r1.27 -r1.26
yann@2437: 
yann@2437: diff -durN glibc-2.12.1.orig/sysdeps/unix/sysv/linux/i386/clone.S glibc-2.12.1/sysdeps/unix/sysv/linux/i386/clone.S
yann@2437: --- glibc-2.12.1.orig/sysdeps/unix/sysv/linux/i386/clone.S	2006-12-04 00:12:36.000000000 +0100
yann@2437: +++ glibc-2.12.1/sysdeps/unix/sysv/linux/i386/clone.S	2009-11-13 00:49:45.000000000 +0100
yann@2437: @@ -120,9 +120,6 @@
yann@2437:  	ret
yann@2437:  
yann@2437:  L(thread_start):
yann@2437: -	cfi_startproc;
yann@2437: -	/* Clearing frame pointer is insufficient, use CFI.  */
yann@2437: -	cfi_undefined (eip);
yann@2437:  	/* Note: %esi is zero.  */
yann@2437:  	movl	%esi,%ebp	/* terminate the stack frame */
yann@2437:  #ifdef RESET_PID
yann@2437: @@ -155,7 +152,6 @@
yann@2437:  	jmp	L(haspid)
yann@2437:  	.previous
yann@2437:  #endif
yann@2437: -	cfi_endproc;
yann@2437:  
yann@2437:  	cfi_startproc
yann@2437:  PSEUDO_END (BP_SYM (__clone))
yann@2437: diff -durN glibc-2.12.1.orig/sysdeps/unix/sysv/linux/x86_64/clone.S glibc-2.12.1/sysdeps/unix/sysv/linux/x86_64/clone.S
yann@2437: --- glibc-2.12.1.orig/sysdeps/unix/sysv/linux/x86_64/clone.S	2006-12-04 00:12:36.000000000 +0100
yann@2437: +++ glibc-2.12.1/sysdeps/unix/sysv/linux/x86_64/clone.S	2009-11-13 00:49:45.000000000 +0100
yann@2437: @@ -89,9 +89,6 @@
yann@2437:  	ret
yann@2437:  
yann@2437:  L(thread_start):
yann@2437: -	cfi_startproc;
yann@2437: -	/* Clearing frame pointer is insufficient, use CFI.  */
yann@2437: -	cfi_undefined (rip);
yann@2437:  	/* Clear the frame pointer.  The ABI suggests this be done, to mark
yann@2437:  	   the outermost frame obviously.  */
yann@2437:  	xorl	%ebp, %ebp
yann@2437: @@ -116,7 +113,6 @@
yann@2437:  	/* Call exit with return value from function call. */
yann@2437:  	movq	%rax, %rdi
yann@2437:  	call	HIDDEN_JUMPTARGET (_exit)
yann@2437: -	cfi_endproc;
yann@2437:  
yann@2437:  	cfi_startproc;
yann@2437:  PSEUDO_END (BP_SYM (__clone))