From: Will Drewry Date: Thu, 12 Apr 2012 21:47:55 +0000 (-0500) Subject: asm/syscall.h: add syscall_get_arch X-Git-Url: http://git.efficios.com/?a=commitdiff_plain;h=07bd18d00d5dcf84eb22f8120f47f09c3d8fe27d;hp=932ecebb0405b9a41cd18946e6cff8a17d434e23;p=deliverable%2Flinux.git 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 Signed-off-by: Will Drewry Acked-by: Serge Hallyn Acked-by: Eric Paris v18: comment and change reword and rebase. v14: rebase/nochanges v13: rebase on to 88ebdda6159ffc15699f204c33feb3e431bf9bdc v12: rebase on to linux-next v11: fixed improper return type v10: introduced Signed-off-by: James Morris --- diff --git a/include/asm-generic/syscall.h b/include/asm-generic/syscall.h index 5c122ae6bfa6..5b09392db673 100644 --- a/include/asm-generic/syscall.h +++ b/include/asm-generic/syscall.h @@ -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 */