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| author | Dmitry Safonov <dsafonov@virtuozzo.com> | 2016-09-05 16:33:08 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2016-09-14 21:28:11 +0200 |
| commit | 6846351052e685c2d1428e80ead2d7ca3d7ed913 (patch) | |
| tree | 5bc4ba09c325f2cd672e793f3c23f69b206bea19 /kernel/signal.c | |
| parent | cc87324b3dbb9bdf6916c7f479230db24c4aa309 (diff) | |
| download | lwn-6846351052e685c2d1428e80ead2d7ca3d7ed913.tar.gz lwn-6846351052e685c2d1428e80ead2d7ca3d7ed913.zip | |
x86/signal: Add SA_{X32,IA32}_ABI sa_flags
Introduce new flags that defines which ABI to use on creating sigframe.
Those flags kernel will set according to sigaction syscall ABI,
which set handler for the signal being delivered.
So that will drop the dependency on TIF_IA32/TIF_X32 flags on signal deliver.
Those flags will be used only under CONFIG_COMPAT.
Similar way ARM uses sa_flags to differ in which mode deliver signal
for 26-bit applications (look at SA_THIRYTWO).
Signed-off-by: Dmitry Safonov <dsafonov@virtuozzo.com>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Cc: 0x7f454c46@gmail.com
Cc: oleg@redhat.com
Cc: linux-mm@kvack.org
Cc: gorcunov@openvz.org
Cc: xemul@virtuozzo.com
Link: http://lkml.kernel.org/r/20160905133308.28234-7-dsafonov@virtuozzo.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/signal.c')
| -rw-r--r-- | kernel/signal.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/signal.c b/kernel/signal.c index af21afc00d08..75761acc77cf 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -3044,6 +3044,11 @@ void kernel_sigaction(int sig, __sighandler_t action) } EXPORT_SYMBOL(kernel_sigaction); +void __weak sigaction_compat_abi(struct k_sigaction *act, + struct k_sigaction *oact) +{ +} + int do_sigaction(int sig, struct k_sigaction *act, struct k_sigaction *oact) { struct task_struct *p = current, *t; @@ -3059,6 +3064,8 @@ int do_sigaction(int sig, struct k_sigaction *act, struct k_sigaction *oact) if (oact) *oact = *k; + sigaction_compat_abi(act, oact); + if (act) { sigdelsetmask(&act->sa.sa_mask, sigmask(SIGKILL) | sigmask(SIGSTOP)); |