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| author | Martin Koegler <mkoegler@auto.tuwien.ac.at> | 2008-05-28 20:50:07 +0200 |
|---|---|---|
| committer | Haavard Skinnemoen <haavard.skinnemoen@atmel.com> | 2008-06-27 15:07:35 +0200 |
| commit | 7c1b90a1e964f72bde88511e5cfe1c04318ff3d1 (patch) | |
| tree | b112564c758ac02033a003e134338fe6a157aa75 /arch/avr32 | |
| parent | 60ed7951d0c9bf8de8588384134f16474367b410 (diff) | |
| download | linux-7c1b90a1e964f72bde88511e5cfe1c04318ff3d1.tar.bz2 | |
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.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/avr32/kernel/signal.c b/arch/avr32/kernel/signal.c index 5616a00c10ba..c5b11f9067f1 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); |