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9 Commits

Author SHA1 Message Date
Joseph Myers
04277e02d7 Update copyright dates with scripts/update-copyrights. 
* All files with FSF copyright notices: Update copyright dates
	using scripts/update-copyrights.
	* locale/programs/charmap-kw.h: Regenerated.
	* locale/programs/locfile-kw.h: Likewise.
 2019-01-01 00:11:28 +00:00
Joseph Myers
688903eb3e Update copyright dates with scripts/update-copyrights. 
* All files with FSF copyright notices: Update copyright dates
	using scripts/update-copyrights.
	* locale/programs/charmap-kw.h: Regenerated.
	* locale/programs/locfile-kw.h: Likewise.
 2018-01-01 00:32:25 +00:00
Stefan Liebler
8beba15d53 S390: Add cfi information for start routines in order to stop unwinding. 
GDB failed to detect the outermost frame while showing the backtrace
within a thread:
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Before this patch, the start routines like thread_start had no cfi information.
GDB is then using the prologue unwinder if no cfi information is available.
This unwinder tries to unwind r15 and stops e.g. if r15 was updated or
on some jump-instructions.

On older glibc-versions (before commit "Remove cached PID/TID in clone"
c579f48edb), the thread_start function used
such a jump-instruction and GDB did not fail with an error.

This patch adds cfi information for _start, thread_start and __makecontext_ret
and marks r14 as undefined which marks the frame as outermost frame and GDB
stops the backtrace. Also tested different gcc versions in order to test
_Unwind_Backtrace() in libgcc as this is used by backtrace() in glibc.

ChangeLog:

	* sysdeps/s390/s390-64/start.S (_start): Add cfi information for r14.
	* sysdeps/s390/s390-32/start.S: (_start): Likewise
	* sysdeps/unix/sysv/linux/s390/s390-64/clone.S
	(thread_start): Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/clone.S
	(thread_start): Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/__makecontext_ret.S
	(__makecontext_ret): Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S
	(__makecontext_ret): Likewise.
 2017-11-21 08:45:28 +01:00
Joseph Myers
bfff8b1bec Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
Joseph Myers
f7a9f785e5 Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
Joseph Myers
b168057aaa Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
Allan McRae
d4697bc93d Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
Joseph Myers
568035b787 Update copyright notices with scripts/update-copyrights. 2013-01-02 19:05:09 +00:00
Andreas Jaeger
492e01c879 Move sysdeps/s390/s390-64/elf files 
* sysdeps/s390/s390-64/elf/bsd-_setjmp.S: Moved to ...
	* sysdeps/s390/s390-64/bsd-_setjmp.S: ... here.
	* sysdeps/s390/s390-64/elf/bsd-setjmp.S: Moved to ...
	* sysdeps/s390/s390-64/bsd-setjmp.S: ... here.
	* sysdeps/s390/s390-64/elf/setjmp.S: Moved to ...
	* sysdeps/s390/s390-64/setjmp.S: ... here.
	* sysdeps/s390/s390-64/elf/configure.in: Moved to ...
	* sysdeps/s390/s390-64/configure.in: ... here
	* sysdeps/s390/s390-64/elf/configure: Delete file.
	* sysdeps/s390/s390-64/elf/start.S: Moved to ...
	* sysdeps/s390/s390-64/start.S: ... here.
	* sysdeps/s390/s390-64/elf/configure: Delete.
 2012-03-28 09:31:29 +02:00