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| author | Vineet Gupta <vgupta@synopsys.com> | 2013-01-18 15:12:19 +0530 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2013-02-15 23:03:30 +0530 |
| commit | c3581039b6c51a778a70accec53a9bb7ad9a4d32 (patch) | |
| tree | 6816e82f1a59fe3d4fbf8c291d3f52598531c50c /arch/arc/Kconfig | |
| parent | d8005e6b95268cbb50db3773d5f180c32a9434fe (diff) | |
| download | linux-c3581039b6c51a778a70accec53a9bb7ad9a4d32.tar.bz2 | |
ARC: Signal handling
Includes following fixes courtesy review by Al-Viro
* Tracer poke to Callee-regs were lost
Before going off into do_signal( ) we save the user-mode callee regs
(as they are not saved by default as part of pt_regs). This is to make
sure that that a Tracer (if tracing related signal) is able to do likes
of PEEKUSR(callee-reg).
However in return path we were simply discarding the user-mode callee
regs, which would break a POKEUSR(callee-reg) from a tracer.
* Issue related to multiple syscall restarts are addressed in next patch
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Acked-by: Jonas Bonn <jonas@southpole.se>
Diffstat (limited to 'arch/arc/Kconfig')
| -rw-r--r-- | arch/arc/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index a4e9806ace23..756beffd20cb 100644 --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -20,6 +20,7 @@ config ARC select GENERIC_KERNEL_EXECVE select GENERIC_KERNEL_THREAD select GENERIC_PENDING_IRQ if SMP + select GENERIC_SIGALTSTACK select GENERIC_SMP_IDLE_THREAD select HAVE_GENERIC_HARDIRQS select MODULES_USE_ELF_RELA |