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| author |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2010-01-13 20:44:27 +0100 |
|---|---|---|
| committer |   Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2010-01-13 20:44:44 +0100 |
| commit | 6f50248ef0efa7453397eb53e41e8aa5df534492 (patch) | |
| tree | c04084989d30918bb9515bebcc9496689e90b4e0 /arch | |
| parent | [S390] clear TIF_SINGLE_STEP for new process. (diff) | |
| download | linux-dev-6f50248ef0efa7453397eb53e41e8aa5df534492.tar.xz linux-dev-6f50248ef0efa7453397eb53e41e8aa5df534492.zip | |
[S390] duplicate SIGTRAP on signal delivery.
The code in do_signal sets the TIF_SINGLE_STEP bit and calls
tracehook_signal_handler after the signal frame has been set up.
This causes two SIGTRAP signals to be delivered to the tracer.
Stop setting the TIF_SINGLE_STEP bit in do_signal to get the
correct number of SIGTRAPs.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/kernel/signal.c | 10 |
1 files changed, 1 insertions, 9 deletions
diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c index 6b4fef877f9d..1675c48b9145 100644 --- a/arch/s390/kernel/signal.c +++ b/arch/s390/kernel/signal.c @@ -500,18 +500,10 @@ void do_signal(struct pt_regs *regs) clear_thread_flag(TIF_RESTORE_SIGMASK); /* - * If we would have taken a single-step trap - * for a normal instruction, act like we took - * one for the handler setup. - */ - if (current->thread.per_info.single_step) - set_thread_flag(TIF_SINGLE_STEP); - - /* * Let tracing know that we've done the handler setup. */ tracehook_signal_handler(signr, &info, &ka, regs, - test_thread_flag(TIF_SINGLE_STEP)); + current->thread.per_info.single_step); } return; } |