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| author | Max Filippov <jcmvbkbc@gmail.com> | 2018-11-12 08:51:49 +0300 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2018-12-18 00:50:25 +0300 |
| commit | af5395c214c15c18de3decf2229373a8c88c4fde (patch) | |
| tree | d378a62b132af1c2532f745e22c99ac69c40bba2 /arch/xtensa/include | |
| parent | 9f24f3c1067c8e4ffbbcd759180b422c9a761b1b (diff) | |
| download | linux-af5395c214c15c18de3decf2229373a8c88c4fde.tar.xz | |
xtensa: implement syscall tracepoints
Add TIF_SYSCALL_TRACEPOINT flag definition; add _TIF_SYSCALL_TRACEPOINT
to _TIF_WORK_MASK. Call trace_sys_enter from do_syscall_trace_enter and
trace_sys_exit from do_syscall_trace_leave when TIF_SYSCALL_TRACEPOINT
flag is set.
Add declaration of sys_call_table to arch/xtensa/include/asm/syscall.h
Add definition of NR_syscalls to arch/xtensa/include/asm/unistd.h
Select HAVE_SYSCALL_TRACEPOINTS.
This change allows tracing each syscall entry and exit through the
ftrace mechanism.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'arch/xtensa/include')
| -rw-r--r-- | arch/xtensa/include/asm/ptrace.h | 5 | ||||
| -rw-r--r-- | arch/xtensa/include/asm/syscall.h | 3 | ||||
| -rw-r--r-- | arch/xtensa/include/asm/thread_info.h | 5 | ||||
| -rw-r--r-- | arch/xtensa/include/asm/unistd.h | 2 |
4 files changed, 14 insertions, 1 deletions
diff --git a/arch/xtensa/include/asm/ptrace.h b/arch/xtensa/include/asm/ptrace.h index f1b1de526d1d..62a58d2567e9 100644 --- a/arch/xtensa/include/asm/ptrace.h +++ b/arch/xtensa/include/asm/ptrace.h @@ -102,6 +102,11 @@ struct pt_regs { #define user_stack_pointer(regs) ((regs)->areg[1]) +static inline unsigned long regs_return_value(struct pt_regs *regs) +{ + return regs->areg[2]; +} + #else /* __ASSEMBLY__ */ # include <asm/asm-offsets.h> diff --git a/arch/xtensa/include/asm/syscall.h b/arch/xtensa/include/asm/syscall.h index e47470ec8ea8..a168bf81c7f4 100644 --- a/arch/xtensa/include/asm/syscall.h +++ b/arch/xtensa/include/asm/syscall.h @@ -19,6 +19,9 @@ static inline int syscall_get_arch(void) return AUDIT_ARCH_XTENSA; } +typedef void (*syscall_t)(void); +extern syscall_t sys_call_table[]; + static inline long syscall_get_nr(struct task_struct *task, struct pt_regs *regs) { diff --git a/arch/xtensa/include/asm/thread_info.h b/arch/xtensa/include/asm/thread_info.h index c823dddfebdf..f333f10a7650 100644 --- a/arch/xtensa/include/asm/thread_info.h +++ b/arch/xtensa/include/asm/thread_info.h @@ -106,6 +106,7 @@ static inline struct thread_info *current_thread_info(void) #define TIF_SIGPENDING 1 /* signal pending */ #define TIF_NEED_RESCHED 2 /* rescheduling necessary */ #define TIF_SINGLESTEP 3 /* restore singlestep on return to user mode */ +#define TIF_SYSCALL_TRACEPOINT 4 /* syscall tracepoint instrumentation */ #define TIF_MEMDIE 5 /* is terminating due to OOM killer */ #define TIF_RESTORE_SIGMASK 6 /* restore signal mask in do_signal() */ #define TIF_NOTIFY_RESUME 7 /* callback before returning to user */ @@ -115,8 +116,10 @@ static inline struct thread_info *current_thread_info(void) #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) #define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP) +#define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT) -#define _TIF_WORK_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP) +#define _TIF_WORK_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \ + _TIF_SYSCALL_TRACEPOINT) /* * Thread-synchronous status. diff --git a/arch/xtensa/include/asm/unistd.h b/arch/xtensa/include/asm/unistd.h index 574e5520968c..0d34629dafc5 100644 --- a/arch/xtensa/include/asm/unistd.h +++ b/arch/xtensa/include/asm/unistd.h @@ -22,4 +22,6 @@ #define __IGNORE_vfork /* use clone */ #define __IGNORE_fadvise64 /* use fadvise64_64 */ +#define NR_syscalls __NR_syscalls + #endif /* _XTENSA_UNISTD_H */ |