[PATCH v10 03/11] asm/syscall.h: add syscall_get_arch
From: Will Drewry <wad@chromium.org>
Date: 2012-02-21 17:34:43
Also in:
linux-arch, lkml
Subsystem:
generic include/asm header files, ptrace support, the rest · Maintainers:
Arnd Bergmann, Oleg Nesterov, Linus Torvalds
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 HAVE_ARCH_SECCOMP_FILTER. That is probably an unneeded detail. Suggested-by: Roland McGrath <redacted> Signed-off-by: Will Drewry <wad@chromium.org> --- include/asm-generic/syscall.h | 14 ++++++++++++++ 1 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/include/asm-generic/syscall.h b/include/asm-generic/syscall.h
index 5c122ae..13edfa2 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. + * + * Note, at present this function is only required with + * CONFIG_HAVE_ARCH_SECCOMP_FILTER. + */ +void syscall_get_arch(struct task_struct *task, struct pt_regs *regs); #endif /* _ASM_SYSCALL_H */
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1.7.5.4