diff options
| author | Ralf Baechle | 2013-09-06 20:24:48 +0200 |
|---|---|---|
| committer | Ralf Baechle | 2013-10-29 21:25:16 +0100 |
| commit | 1d7bf993e0731b4ac790667c196b2a2d787f95c3 (patch) | |
| tree | 235093a4593d6c68b87b5d602a2f1d0dde3ad085 /arch/mips/include | |
| parent | 0dfa95aaa817eec8473abf5465eae135b1cf1138 (diff) | |
MIPS: ftrace: Add support for syscall tracepoints.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include')
| -rw-r--r-- | arch/mips/include/asm/syscall.h | 19 | ||||
| -rw-r--r-- | arch/mips/include/asm/thread_info.h | 9 | ||||
| -rw-r--r-- | arch/mips/include/asm/unistd.h | 7 |
3 files changed, 32 insertions, 3 deletions
diff --git a/arch/mips/include/asm/syscall.h b/arch/mips/include/asm/syscall.h index 087df5f26f86..81c89132c59d 100644 --- a/arch/mips/include/asm/syscall.h +++ b/arch/mips/include/asm/syscall.h @@ -59,6 +59,25 @@ static inline unsigned long mips_get_syscall_arg(unsigned long *arg, } } +static inline long syscall_get_return_value(struct task_struct *task, + struct pt_regs *regs) +{ + return regs->regs[2]; +} + +static inline void syscall_set_return_value(struct task_struct *task, + struct pt_regs *regs, + int error, long val) +{ + if (error) { + regs->regs[2] = -error; + regs->regs[7] = -1; + } else { + regs->regs[2] = val; + regs->regs[7] = 0; + } +} + static inline void syscall_get_arguments(struct task_struct *task, struct pt_regs *regs, unsigned int i, unsigned int n, diff --git a/arch/mips/include/asm/thread_info.h b/arch/mips/include/asm/thread_info.h index e0c8cf3b16ff..f9b24bfbdbae 100644 --- a/arch/mips/include/asm/thread_info.h +++ b/arch/mips/include/asm/thread_info.h @@ -116,6 +116,7 @@ static inline struct thread_info *current_thread_info(void) #define TIF_32BIT_ADDR 23 /* 32-bit address space (o32/n32) */ #define TIF_FPUBOUND 24 /* thread bound to FPU-full CPU set */ #define TIF_LOAD_WATCH 25 /* If set, load watch registers */ +#define TIF_SYSCALL_TRACEPOINT 26 /* syscall tracepoint instrumentation */ #define TIF_SYSCALL_TRACE 31 /* syscall trace active */ #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) @@ -132,20 +133,22 @@ static inline struct thread_info *current_thread_info(void) #define _TIF_32BIT_ADDR (1<<TIF_32BIT_ADDR) #define _TIF_FPUBOUND (1<<TIF_FPUBOUND) #define _TIF_LOAD_WATCH (1<<TIF_LOAD_WATCH) +#define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT) #define _TIF_WORK_SYSCALL_ENTRY (_TIF_NOHZ | _TIF_SYSCALL_TRACE | \ - _TIF_SYSCALL_AUDIT) + _TIF_SYSCALL_AUDIT | _TIF_SYSCALL_TRACEPOINT) /* work to do in syscall_trace_leave() */ #define _TIF_WORK_SYSCALL_EXIT (_TIF_NOHZ | _TIF_SYSCALL_TRACE | \ - _TIF_SYSCALL_AUDIT) + _TIF_SYSCALL_AUDIT | _TIF_SYSCALL_TRACEPOINT) /* work to do on interrupt/exception return */ #define _TIF_WORK_MASK \ (_TIF_SIGPENDING | _TIF_NEED_RESCHED | _TIF_NOTIFY_RESUME) /* work to do on any return to u-space */ #define _TIF_ALLWORK_MASK (_TIF_NOHZ | _TIF_WORK_MASK | \ - _TIF_WORK_SYSCALL_EXIT) + _TIF_WORK_SYSCALL_EXIT | \ + _TIF_SYSCALL_TRACEPOINT) /* * We stash processor id into a COP0 register to retrieve it fast diff --git a/arch/mips/include/asm/unistd.h b/arch/mips/include/asm/unistd.h index 63c9c886173a..4d3b92886665 100644 --- a/arch/mips/include/asm/unistd.h +++ b/arch/mips/include/asm/unistd.h @@ -14,6 +14,13 @@ #include <uapi/asm/unistd.h> +#ifdef CONFIG_MIPS32_N32 +#define NR_syscalls (__NR_N32_Linux + __NR_N32_Linux_syscalls) +#elif defined(CONFIG_64BIT) +#define NR_syscalls (__NR_64_Linux + __NR_64_Linux_syscalls) +#else +#define NR_syscalls (__NR_O32_Linux + __NR_O32_Linux_syscalls) +#endif #ifndef __ASSEMBLY__ |