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authorMartin Koegler <mkoegler@auto.tuwien.ac.at>2008-05-28 20:50:07 +0200
committerHaavard Skinnemoen <haavard.skinnemoen@atmel.com>2008-06-27 15:07:35 +0200
commit7c1b90a1e964f72bde88511e5cfe1c04318ff3d1 (patch)
treeb112564c758ac02033a003e134338fe6a157aa75 /arch/avr32
parent60ed7951d0c9bf8de8588384134f16474367b410 (diff)
downloadlinux-7c1b90a1e964f72bde88511e5cfe1c04318ff3d1.tar.gz
avr32: Fix sigaltstack behaviour
A signal handler should be able to change the signal stack used for the next signal by altering the ucontext_t passed as a parameter to the handler. This does not currently work on avr32 since it doesn't update the in-kernel signal context from the ucontext_t upon signal handler return. Fix it by adding a call to do_sigaltstack() from sys_rt_sigreturn(), bringing it in line with most other architectures. Signed-off-by: Martin Koegler <mkoegler@auto.tuwien.ac.at> [haavard.skinnemoen@atmel.com: changed patch description] Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Diffstat (limited to 'arch/avr32')
-rw-r--r--arch/avr32/kernel/signal.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/avr32/kernel/signal.c b/arch/avr32/kernel/signal.c
index 5616a00..c5b11f9 100644
--- a/arch/avr32/kernel/signal.c
+++ b/arch/avr32/kernel/signal.c
@@ -93,6 +93,9 @@ asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
goto badframe;
+ if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->sp) == -EFAULT)
+ goto badframe;
+
pr_debug("Context restored: pc = %08lx, lr = %08lx, sp = %08lx\n",
regs->pc, regs->lr, regs->sp);