| #ifndef _LINUX_FTRACE_H |
| #define _LINUX_FTRACE_H |
| |
| #ifdef CONFIG_FTRACE |
| |
| #include <linux/linkage.h> |
| |
| typedef void (*ftrace_func_t)(unsigned long ip, unsigned long parent_ip); |
| |
| struct ftrace_ops { |
| ftrace_func_t func; |
| struct ftrace_ops *next; |
| }; |
| |
| /* |
| * The ftrace_ops must be a static and should also |
| * be read_mostly. These functions do modify read_mostly variables |
| * so use them sparely. Never free an ftrace_op or modify the |
| * next pointer after it has been registered. Even after unregistering |
| * it, the next pointer may still be used internally. |
| */ |
| int register_ftrace_function(struct ftrace_ops *ops); |
| int unregister_ftrace_function(struct ftrace_ops *ops); |
| void clear_ftrace_function(void); |
| |
| extern void ftrace_stub(unsigned long a0, unsigned long a1); |
| extern void mcount(void); |
| |
| #else /* !CONFIG_FTRACE */ |
| # define register_ftrace_function(ops) do { } while (0) |
| # define unregister_ftrace_function(ops) do { } while (0) |
| # define clear_ftrace_function(ops) do { } while (0) |
| #endif /* CONFIG_FTRACE */ |
| |
| |
| #ifdef CONFIG_FRAME_POINTER |
| /* TODO: need to fix this for ARM */ |
| # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) |
| # define CALLER_ADDR1 ((unsigned long)__builtin_return_address(1)) |
| # define CALLER_ADDR2 ((unsigned long)__builtin_return_address(2)) |
| # define CALLER_ADDR3 ((unsigned long)__builtin_return_address(3)) |
| # define CALLER_ADDR4 ((unsigned long)__builtin_return_address(4)) |
| # define CALLER_ADDR5 ((unsigned long)__builtin_return_address(5)) |
| #else |
| # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) |
| # define CALLER_ADDR1 0UL |
| # define CALLER_ADDR2 0UL |
| # define CALLER_ADDR3 0UL |
| # define CALLER_ADDR4 0UL |
| # define CALLER_ADDR5 0UL |
| #endif |
| |
| #ifdef CONFIG_IRQSOFF_TRACER |
| extern void notrace time_hardirqs_on(unsigned long a0, unsigned long a1); |
| extern void notrace time_hardirqs_off(unsigned long a0, unsigned long a1); |
| #else |
| # define time_hardirqs_on(a0, a1) do { } while (0) |
| # define time_hardirqs_off(a0, a1) do { } while (0) |
| #endif |
| |
| #endif /* _LINUX_FTRACE_H */ |