Commit 07bd18d0 authored Apr 12, 2012 by Will Drewry Committed by James Morris Apr 14, 2012

asm/syscall.h: add syscall_get_arch



Adds a stub for a function that will return the AUDIT_ARCH_* value
appropriate to the supplied task based on the system call convention.

For audit's use, the value can generally be hard-coded at the
audit-site.  However, for other functionality not inlined into syscall
entry/exit, this makes that information available.  seccomp_filter is
the first planned consumer and, as such, the comment indicates a tie to
CONFIG_HAVE_ARCH_SECCOMP_FILTER.

Suggested-by: Roland McGrath <mcgrathr@chromium.org>
Signed-off-by: Will Drewry <wad@chromium.org>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Acked-by: Eric Paris <eparis@redhat.com>

v18: comment and change reword and rebase.
v14: rebase/nochanges
v13: rebase on to 88ebdda6
v12: rebase on to linux-next
v11: fixed improper return type
v10: introduced
Signed-off-by: James Morris <james.l.morris@oracle.com>

parent 932ecebb

include/asm-generic/syscall.h

+14 −0

Original line number	Diff line number	Diff line
		@@ -142,4 +142,18 @@ void syscall_set_arguments(struct task_struct task, struct pt_regs regs,
		unsigned int i, unsigned int n,
		const unsigned long *args);

		/**
		* syscall_get_arch - return the AUDIT_ARCH for the current system call
		* @task: task of interest, must be in system call entry tracing
		* @regs: task_pt_regs() of @task
		*
		* Returns the AUDIT_ARCH_* based on the system call convention in use.
		*
		* It's only valid to call this when @task is stopped on entry to a system
		* call, due to %TIF_SYSCALL_TRACE, %TIF_SYSCALL_AUDIT, or %TIF_SECCOMP.
		*
		* Architectures which permit CONFIG_HAVE_ARCH_SECCOMP_FILTER must
		* provide an implementation of this.
		*/
		int syscall_get_arch(struct task_struct task, struct pt_regs regs);
		#endif /* _ASM_SYSCALL_H */