mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-11-15 20:58:13 +01:00
57e5696463
On some systems executable stacks are denied. Since libunwind and the
tests don't actually need executable stacks this patch marks all
assembly files as not needing it.
The original patch comes from frysk:
2007-04-05 Jan Kratochvil <jan.kratochvil@redhat.com>
* src/hppa/getcontext.S, src/hppa/setcontext.S, src/hppa/siglongjmp.S,
src/ia64/Ginstall_cursor.S, src/ia64/Linstall_cursor.S,
src/ia64/dyn_info_list.S, src/ia64/getcontext.S, src/ia64/longjmp.S,
src/ia64/setjmp.S, src/ia64/siglongjmp.S, src/ia64/sigsetjmp.S,
src/ppc64/longjmp.S, src/ppc64/siglongjmp.S, src/x86/longjmp.S,
src/x86/siglongjmp.S, src/x86_64/longjmp.S, src/x86_64/setcontext.S,
src/x86_64/siglongjmp.S: Stack should be non-executable, for SELinux.
I added a couple more markers for new files in current libunwind.
Before this patch you would get the following on selinux enabled
systems without allow_exec_stack: error while loading shared
libraries:
libunwind.so.7: cannot enable executable stack as shared object
requires: Permission denied
After the patch that error disappears and all test results are similar
to the results on systems without executable stack protection.
77 lines
2.6 KiB
ArmAsm
77 lines
2.6 KiB
ArmAsm
/* libunwind - a platform-independent unwind library
|
|
Copyright (C) 2004 Hewlett-Packard Co
|
|
Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
|
|
|
|
This file is part of libunwind.
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining
|
|
a copy of this software and associated documentation files (the
|
|
"Software"), to deal in the Software without restriction, including
|
|
without limitation the rights to use, copy, modify, merge, publish,
|
|
distribute, sublicense, and/or sell copies of the Software, and to
|
|
permit persons to whom the Software is furnished to do so, subject to
|
|
the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be
|
|
included in all copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
|
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
|
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
|
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
|
|
|
|
/* The setcontext() in glibc is a no-op (as of 4 Dec 2004), so we have
|
|
to implement something useful on our own here. */
|
|
|
|
#define FILL(n) ldw (LINUX_UC_MCONTEXT_OFF+LINUX_SC_GR_OFF+4*(n))(%r26),%r##n
|
|
|
|
#include "offsets.h"
|
|
|
|
.align 4
|
|
.global _Uhppa_setcontext
|
|
.protected _Uhppa_setcontext
|
|
.proc
|
|
.callinfo
|
|
_Uhppa_setcontext:
|
|
FILL (2) /* return-pointer */
|
|
FILL (3) /* frame pointer */
|
|
FILL (4) /* 2nd-ary frame pointer */
|
|
FILL (5) /* preserved register */
|
|
FILL (6) /* preserved register */
|
|
FILL (7) /* preserved register */
|
|
FILL (8) /* preserved register */
|
|
FILL (9) /* preserved register */
|
|
FILL (10) /* preserved register */
|
|
FILL (11) /* preserved register */
|
|
FILL (12) /* preserved register */
|
|
FILL (13) /* preserved register */
|
|
FILL (14) /* preserved register */
|
|
FILL (15) /* preserved register */
|
|
FILL (16) /* preserved register */
|
|
FILL (17) /* preserved register */
|
|
FILL (18) /* preserved register */
|
|
FILL (19) /* linkage-table register */
|
|
FILL (27) /* global-data pointer */
|
|
FILL (30) /* stack pointer */
|
|
|
|
ldo (LINUX_UC_MCONTEXT_OFF+LINUX_SC_FR_OFF)(%r26), %r29
|
|
fldds,ma 8(%r29), %fr12
|
|
fldds,ma 8(%r29), %fr13
|
|
fldds,ma 8(%r29), %fr14
|
|
fldds,ma 8(%r29), %fr15
|
|
fldds,ma 8(%r29), %fr16
|
|
fldds,ma 8(%r29), %fr17
|
|
fldds,ma 8(%r29), %fr18
|
|
fldds,ma 8(%r29), %fr19
|
|
fldds,ma 8(%r29), %fr20
|
|
fldds 8(%r29), %fr21
|
|
|
|
bv,n %r0(%rp)
|
|
.procend
|
|
#ifdef __linux__
|
|
/* We do not need executable stack. */
|
|
.section .note.GNU-stack,"",@progbits
|
|
#endif
|