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patches/glibc/2.9/160-i386-x86_64-revert-clone-cfi.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Mon Mar 30 21:17:21 2009 +0000 (2009-03-30)
changeset 1281 12a2991fcffb
parent 1201 c9967a6e3b25
permissions -rw-r--r--
Cleanup the tic build used for native ncurses build, itself needed for native gdb build.

/trunk/scripts/build/debug/300-gdb.sh | 24 12 12 0 ++++++++++++------------
/trunk/scripts/build/internals.sh | 1 0 1 0 -
2 files changed, 12 insertions(+), 13 deletions(-) 
     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))
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