forge/linux-uconsole
1
0
Fork 0
Code Issues 1 Pull requests Projects Releases Packages Wiki Activity Actions
linux-uconsole/tools/perf/bench
History
Jiri Olsa f021e004b6 perf tools: Fix perf stack to non executable on x86_64 
commit 7a0153ee15 upstream.

By adding following objects:
  bench/mem-memcpy-x86-64-asm.o
the x86_64 perf binary ended up with executable stack.

The reason was that above object are assembler sourced and is missing the
GNU-stack note section. In such case the linker assumes that the final binary
should not be restricted at all and mark the stack as RWX.

Adding section ".note.GNU-stack" definition to mentioned object, with all
flags disabled, thus omiting this object from linker stack flags decision.

Problem introduced in:

  $ git describe ea7872b
  v2.6.37-rc2-19-gea7872b

Reported-at: https://bugzilla.redhat.com/show_bug.cgi?id=783570
Reported-by: Clark Williams <williams@redhat.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1328100848-5630-1-git-send-email-jolsa@redhat.com
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
[ committer note: Backported fix to perf/urgent (3.3-rc2+) ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-02-20 12:48:09 -08:00
..
bench.h perf bench: Add memcpy() benchmark 2009-11-19 06:21:48 +01:00
mem-memcpy-arch.h perf bench: Add feature that measures the performance of the arch/x86/lib/memcpy_64.S memcpy routines via 'perf bench mem' 2010-11-26 08:15:57 +01:00
mem-memcpy-x86-64-asm-def.h perf bench: Add feature that measures the performance of the arch/x86/lib/memcpy_64.S memcpy routines via 'perf bench mem' 2010-11-26 08:15:57 +01:00
mem-memcpy-x86-64-asm.S perf tools: Fix perf stack to non executable on x86_64 2012-02-20 12:48:09 -08:00
mem-memcpy.c perf bench: Print both of prefaulted and no prefaulted results by default 2010-11-26 08:15:57 +01:00
sched-messaging.c perf options: Check v type in OPT_U?INTEGER 2010-05-17 15:43:38 -03:00
sched-pipe.c perf tool: Fix gcc 4.6.0 issues 2011-02-07 12:41:41 -02:00