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| author | Dmitry Safonov <dsafonov@virtuozzo.com> | 2016-09-05 13:33:08 (GMT) |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2016-09-14 19:28:11 (GMT) |
| commit | 6846351052e685c2d1428e80ead2d7ca3d7ed913 (patch) | |
| tree | 5bc4ba09c325f2cd672e793f3c23f69b206bea19 /arch/x86/include/asm | |
| parent | cc87324b3dbb9bdf6916c7f479230db24c4aa309 (diff) | |
| download | linux-6846351052e685c2d1428e80ead2d7ca3d7ed913.tar.xz | |
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 'arch/x86/include/asm')
| -rw-r--r-- | arch/x86/include/asm/fpu/signal.h | 6 | ||||
| -rw-r--r-- | arch/x86/include/asm/signal.h | 4 |
2 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/include/asm/fpu/signal.h b/arch/x86/include/asm/fpu/signal.h index 0e970d0..20a1fbf 100644 --- a/arch/x86/include/asm/fpu/signal.h +++ b/arch/x86/include/asm/fpu/signal.h @@ -19,6 +19,12 @@ int ia32_setup_frame(int sig, struct ksignal *ksig, # define ia32_setup_rt_frame __setup_rt_frame #endif +#ifdef CONFIG_COMPAT +int __copy_siginfo_to_user32(compat_siginfo_t __user *to, + const siginfo_t *from, bool x32_ABI); +#endif + + extern void convert_from_fxsr(struct user_i387_ia32_struct *env, struct task_struct *tsk); extern void convert_to_fxsr(struct task_struct *tsk, diff --git a/arch/x86/include/asm/signal.h b/arch/x86/include/asm/signal.h index dd1e7d6..8af22be 100644 --- a/arch/x86/include/asm/signal.h +++ b/arch/x86/include/asm/signal.h @@ -23,6 +23,10 @@ typedef struct { unsigned long sig[_NSIG_WORDS]; } sigset_t; +/* non-uapi in-kernel SA_FLAGS for those indicates ABI for a signal frame */ +#define SA_IA32_ABI 0x02000000u +#define SA_X32_ABI 0x01000000u + #ifndef CONFIG_COMPAT typedef sigset_t compat_sigset_t; #endif |