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80a56cc3ee
Now the ARM port implements pointer encryption for jmpbufs, gdb needs a SystemTap probe point in longjmp to determine the target PC of a call to longjmp. This patch implements the probe point in longjmp and a similar probe point in setjmp. In order to have all the appropriate registers available to pass to the probe this reorders the layout of jmpbuf, putting the sp and lr registers at the start rather than the end, allowing them to be read and written sequentially. Tested on armv7, no new failures in the glibc testsuite and confirmed that this fixes the gdb.base/longjmp.exp failures in the gdb testsuite. ChangeLog: 2014-02-25 Will Newton <will.newton@linaro.org> * sysdeps/arm/__longjmp.S: Include stap-probe.h. (__longjmp): Restore sp and lr before restoring callee saved registers. Add longjmp and longjmp_target SystemTap probe point. * sysdeps/arm/bits/setjmp.h (__jmp_buf): Update comment. * sysdeps/arm/include/bits/setjmp.h (__JMP_BUF_SP): Define to zero to match jmpbuf layout. * sysdeps/arm/setjmp.S: Include stap-probe.h. (__sigsetjmp): Save sp and lr before saving callee saved registers. Add setjmp SystemTap probe point.
37 lines
1.3 KiB
C
37 lines
1.3 KiB
C
/* Private jmp_buf-related definitions. ARM EABI version.
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Copyright (C) 2013-2014 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _INCLUDE_BITS_SETJMP_H
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#define _INCLUDE_BITS_SETJMP_H 1
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#ifndef __ASSEMBLER__
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/* Get the public declarations. */
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# include <sysdeps/arm/bits/setjmp.h>
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#endif
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#ifndef _ISOMAC
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/* Register list for a ldm/stm instruction to load/store
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the general registers from a __jmp_buf. */
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# define JMP_BUF_REGLIST {v1-v6, sl, fp}
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/* Index of __jmp_buf where the sp register resides. */
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# define __JMP_BUF_SP 0
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#endif
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#endif /* include/bits/setjmp.h */
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