mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-27 03:41:23 +08:00
52b2a80fae
This patch changes longjmp to always restore the TOC pointer (r2 register) to the caller frame on powerpc64 and powerpc64le. This is related to bug 21895 that reports a situation where you have a static longjmp to a shared object file. [BZ #21895] * sysdeps/powerpc/powerpc64/__longjmp-common.S: Remove condition code for restoring r2 in longjmp. * sysdeps/powerpc/powerpc64/Makefile: Added tst-setjmp-bug21895-static to test list. Added rules to build test tst-setjmp-bug21895-static. Added module setjmp-bug21895 and rules to build a shared object from it. * sysdeps/powerpc/powerpc64/setjmp-bug21895.c: New test file. * sysdeps/powerpc/powerpc64/tst-setjmp-bug21895-static.c: New test file. Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
/* Shared object part of test for setjmp interoperability with static
|
|
dlopen BZ #21895.
|
|
Copyright (C) 2017-2018 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <string.h>
|
|
#include <setjmp.h>
|
|
|
|
/* Copy r1 adress to a local variable. */
|
|
#define GET_STACK_POINTER(sp) \
|
|
({ \
|
|
asm volatile ("mr %0, 1\n\t" \
|
|
: "=r" (sp)); \
|
|
})
|
|
|
|
jmp_buf jb;
|
|
void (*bar)(jmp_buf, unsigned long);
|
|
|
|
void
|
|
lbar (unsigned long sp)
|
|
{
|
|
bar(jb, sp);
|
|
for(;;);
|
|
}
|
|
|
|
void
|
|
foo (void)
|
|
{
|
|
unsigned long sp;
|
|
/* Copy r1 (stack pointer) to sp. It will be use later to get
|
|
TOC area. */
|
|
GET_STACK_POINTER(sp);
|
|
setjmp(jb);
|
|
lbar(sp);
|
|
|
|
for(;;);
|
|
}
|