[PATCH] ARM: SECCOMP support
Russell King - ARM Linux
linux at arm.linux.org.uk
Sat Sep 25 07:34:13 EDT 2010
On Thu, Sep 23, 2010 at 05:11:36PM -0400, Nicolas Pitre wrote:
> diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
> index f05a35a..cdd0a88 100644
> --- a/arch/arm/kernel/entry-common.S
> +++ b/arch/arm/kernel/entry-common.S
> @@ -314,6 +314,16 @@ ENTRY(vector_swi)
> tst ip, #_TIF_SYSCALL_TRACE @ are we tracing syscalls?
> bne __sys_trace
>
> +#ifdef CONFIG_SECCOMP
> + tst ip, #_TIF_SECCOMP
> + beq 1f
> + mov r0, scno
> + bl __secure_computing
> + add r0, sp, #S_R0 + S_OFF @ pointer to regs
> + ldmia r0, {r0 - r3} @ have to reload r0 - r3
> +1:
> +#endif
Why not do this before the test for TIF_SYSCALL_TRACE? You're doing
the same check in both paths, and x86 checks for secure computing
before any syscall tracing stuff.
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