[PATCH v7 5/6] arm64: add SIGSYS siginfo for compat task

[takahiro.akashi@linaro.org (AKASHI Takahiro)]

On 10/08/2014 11:30 PM, Will Deacon wrote:
> On Thu, Oct 02, 2014 at 10:46:15AM +0100, AKASHI Takahiro wrote:
>> SIGSYS is primarily used in secure computing to notify tracer.
>> This patch allows signal handler on compat task to get correct information
>> with SA_SIGINFO specified when this signal is delivered.
>>
>> Reviewed-by: Kees Cook <keescook@chromium.org>
>> Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
>> ---
>>   arch/arm64/include/asm/compat.h |    7 +++++++
>>   arch/arm64/kernel/signal32.c    |    6 ++++++
>>   2 files changed, 13 insertions(+)
>>
>> diff --git a/arch/arm64/include/asm/compat.h b/arch/arm64/include/asm/compat.h
>> index 253e33b..c877915 100644
>> --- a/arch/arm64/include/asm/compat.h
>> +++ b/arch/arm64/include/asm/compat.h
>> @@ -205,6 +205,13 @@ typedef struct compat_siginfo {
>>   			compat_long_t _band;	/* POLL_IN, POLL_OUT, POLL_MSG */
>>   			int _fd;
>>   		} _sigpoll;
>> +
>> +		/* SIGSYS */
>> +		struct {
>> +			compat_uptr_t _call_addr; /* calling user insn */
>> +			int _syscall;	/* triggering system call number */
>> +			unsigned int _arch;	/* AUDIT_ARCH_* of syscall */
>
> nit, but compat_uint_t looks better here (I have no idea why I didn't do
> this for the signed int types, but hey).

I will fix it.

-Takahiro AKASHI

> Will
>