patches/glibc/2.9/160-i386-x86_64-revert-clone-cfi.patch
author Zhenqiang Chen <zhenqiang.chen@linaro.org>
Fri Nov 18 11:32:50 2011 +0800 (2011-11-18)
branch1.13
changeset 2841 64fe22ca6e6f
parent 1201 c9967a6e3b25
permissions -rw-r--r--
cc/gcc: Apply CT_CC_GCC_DISABLE_PCH to do_cc_core.

Otherwise, users have to input --disable-libstdcxx-pch option
when building bare-metal CANADIAN C++ compiler.

Reviewed-by: Michael Hope
Signed-off-by: Zhenqiang Chen <zhenqiang.chen@linaro.org>
(transplanted from e3e1c9d45bddfbfb433ee9d583faf42fa31f50c0)
     1 Original patch from: gentoo/src/patchsets/glibc/2.9/0070_all_glibc-i386-x86_64-revert-clone-cfi.patch
     2 
     3 -= BEGIN original header =-
     4 revert cfi additions to clone on i386/x86_64 to workaround problems in
     5 gcc's unwinder code.  this is not a bug in glibc, it triggers problems
     6 elsewhere.  this cfi code does not gain us a whole lot anyways.
     7 
     8 http://gcc.gnu.org/ml/gcc/2006-12/msg00293.html
     9 
    10 -= END original header =-
    11 
    12 diff -durN glibc-2_9.orig/sysdeps/unix/sysv/linux/i386/clone.S glibc-2_9/sysdeps/unix/sysv/linux/i386/clone.S
    13 --- glibc-2_9.orig/sysdeps/unix/sysv/linux/i386/clone.S	2006-12-04 00:12:36.000000000 +0100
    14 +++ glibc-2_9/sysdeps/unix/sysv/linux/i386/clone.S	2009-02-02 22:00:45.000000000 +0100
    15 @@ -120,9 +120,6 @@
    16  	ret
    17  
    18  L(thread_start):
    19 -	cfi_startproc;
    20 -	/* Clearing frame pointer is insufficient, use CFI.  */
    21 -	cfi_undefined (eip);
    22  	/* Note: %esi is zero.  */
    23  	movl	%esi,%ebp	/* terminate the stack frame */
    24  #ifdef RESET_PID
    25 @@ -155,7 +152,6 @@
    26  	jmp	L(haspid)
    27  	.previous
    28  #endif
    29 -	cfi_endproc;
    30  
    31  	cfi_startproc
    32  PSEUDO_END (BP_SYM (__clone))
    33 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
    34 --- glibc-2_9.orig/sysdeps/unix/sysv/linux/x86_64/clone.S	2006-12-04 00:12:36.000000000 +0100
    35 +++ glibc-2_9/sysdeps/unix/sysv/linux/x86_64/clone.S	2009-02-02 22:00:45.000000000 +0100
    36 @@ -89,9 +89,6 @@
    37  	ret
    38  
    39  L(thread_start):
    40 -	cfi_startproc;
    41 -	/* Clearing frame pointer is insufficient, use CFI.  */
    42 -	cfi_undefined (rip);
    43  	/* Clear the frame pointer.  The ABI suggests this be done, to mark
    44  	   the outermost frame obviously.  */
    45  	xorl	%ebp, %ebp
    46 @@ -116,7 +113,6 @@
    47  	/* Call exit with return value from function call. */
    48  	movq	%rax, %rdi
    49  	call	HIDDEN_JUMPTARGET (_exit)
    50 -	cfi_endproc;
    51  
    52  	cfi_startproc;
    53  PSEUDO_END (BP_SYM (__clone))