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authorVineet Gupta <vgupta@synopsys.com>2013-01-18 15:12:19 +0530
committerVineet Gupta <vgupta@synopsys.com>2013-02-15 23:03:30 +0530
commitc3581039b6c51a778a70accec53a9bb7ad9a4d32 (patch)
tree6816e82f1a59fe3d4fbf8c291d3f52598531c50c /arch/arc/Kconfig
parentd8005e6b95268cbb50db3773d5f180c32a9434fe (diff)
downloadop-kernel-dev-c3581039b6c51a778a70accec53a9bb7ad9a4d32.zip
op-kernel-dev-c3581039b6c51a778a70accec53a9bb7ad9a4d32.tar.gz
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/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index a4e9806..756beff 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
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