From f91c274ab850b627eaa7862ef1241ce5d720e03e Mon Sep 17 00:00:00 2001 From: AKASHI Takahiro Date: Wed, 30 Apr 2014 10:51:29 +0100 Subject: [PATCH] arm64: make a single hook to syscall_trace() for all syscall features Currently syscall_trace() is called only for ptrace. With additional TIF_xx flags defined, it is now called in all the cases of audit, ftrace and seccomp in addition to ptrace. Acked-by: Richard Guy Briggs Acked-by: Will Deacon Signed-off-by: AKASHI Takahiro Signed-off-by: Will Deacon Signed-off-by: Catalin Marinas Conflicts: arch/arm64/include/asm/thread_info.h arch/arm64/kernel/entry.S Change-Id: Iee71c44c45b363194a1cc7182906c0afa6b5348b --- arch/arm64/include/asm/thread_info.h | 13 +++++++++++++ arch/arm64/kernel/entry.S | 5 +++-- 2 files changed, 16 insertions(+), 2 deletions(-) diff --git a/arch/arm64/include/asm/thread_info.h b/arch/arm64/include/asm/thread_info.h index 5e95a6ce074a..c77b13b4e36e 100644 --- a/arch/arm64/include/asm/thread_info.h +++ b/arch/arm64/include/asm/thread_info.h @@ -97,6 +97,9 @@ static inline struct thread_info *current_thread_info(void) /* * thread information flags: * TIF_SYSCALL_TRACE - syscall trace active + * TIF_SYSCALL_TRACEPOINT - syscall tracepoint for ftrace + * TIF_SYSCALL_AUDIT - syscall auditing + * TIF_SECOMP - syscall secure computing * TIF_SIGPENDING - signal pending * TIF_NEED_RESCHED - rescheduling necessary * TIF_NOTIFY_RESUME - callback before returning to user @@ -108,6 +111,9 @@ static inline struct thread_info *current_thread_info(void) #define TIF_NOTIFY_RESUME 2 /* callback before returning to user */ #define TIF_FOREIGN_FPSTATE 3 /* CPU's FP state is not current's */ #define TIF_SYSCALL_TRACE 8 +#define TIF_SYSCALL_AUDIT 9 +#define TIF_SYSCALL_TRACEPOINT 10 +#define TIF_SECCOMP 11 #define TIF_POLLING_NRFLAG 16 #define TIF_MEMDIE 18 /* is terminating due to OOM killer */ #define TIF_FREEZE 19 @@ -120,10 +126,17 @@ static inline struct thread_info *current_thread_info(void) #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) #define _TIF_FOREIGN_FPSTATE (1 << TIF_FOREIGN_FPSTATE) +#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) +#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) +#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT) +#define _TIF_SECCOMP (1 << TIF_SECCOMP) #define _TIF_32BIT (1 << TIF_32BIT) #define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \ _TIF_NOTIFY_RESUME | _TIF_FOREIGN_FPSTATE) +#define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \ + _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP) + #endif /* __KERNEL__ */ #endif /* __ASM_THREAD_INFO_H */ diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index 0b65510230bb..0c609291e963 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -642,8 +642,9 @@ el0_svc_naked: // compat entry point enable_irq get_thread_info tsk - ldr x16, [tsk, #TI_FLAGS] // check for syscall tracing - tbnz x16, #TIF_SYSCALL_TRACE, __sys_trace // are we tracing syscalls? + ldr x16, [tsk, #TI_FLAGS] // check for syscall hooks + tst x16, #_TIF_SYSCALL_WORK + b.ne __sys_trace adr lr, ret_fast_syscall // return address cmp scno, sc_nr // check upper syscall limit b.hs ni_sys -- 2.34.1