#ifndef _LINUX_FTRACE_H #define _LINUX_FTRACE_H #ifdef CONFIG_FTRACE #include <linux/linkage.h> #include <linux/fs.h> extern int ftrace_enabled; extern int ftrace_enable_sysctl(struct ctl_table *table, int write, struct file *filp, void __user *buffer, size_t *lenp, loff_t *ppos); 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); #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_DYNAMIC_FTRACE # define FTRACE_HASHBITS 10 # define FTRACE_HASHSIZE (1<<FTRACE_HASHBITS) enum { FTRACE_FL_FREE = (1 << 0), FTRACE_FL_FAILED = (1 << 1), FTRACE_FL_FILTER = (1 << 2), FTRACE_FL_ENABLED = (1 << 3), FTRACE_FL_NOTRACE = (1 << 4), FTRACE_FL_CONVERTED = (1 << 5), FTRACE_FL_FROZEN = (1 << 6), }; struct dyn_ftrace { struct hlist_node node; unsigned long ip; /* address of mcount call-site */ unsigned long flags; }; int ftrace_force_update(void); void ftrace_set_filter(unsigned char *buf, int len, int reset); /* defined in arch */ extern int ftrace_ip_converted(unsigned long ip); extern unsigned char *ftrace_nop_replace(void); extern unsigned char *ftrace_call_replace(unsigned long ip, unsigned long addr); extern int ftrace_dyn_arch_init(void *data); extern int ftrace_mcount_set(unsigned long *data); extern int ftrace_modify_code(unsigned long ip, unsigned char *old_code, unsigned char *new_code); extern int ftrace_update_ftrace_func(ftrace_func_t func); extern void ftrace_caller(void); extern void ftrace_call(void); extern void mcount_call(void); extern int skip_trace(unsigned long ip); void ftrace_disable_daemon(void); void ftrace_enable_daemon(void); #else # define skip_trace(ip) ({ 0; }) # define ftrace_force_update() ({ 0; }) # define ftrace_set_filter(buf, len, reset) do { } while (0) # define ftrace_disable_daemon() do { } while (0) # define ftrace_enable_daemon() do { } while (0) #endif /* CONFIG_DYNAMIC_FTRACE */ /* totally disable ftrace - can not re-enable after this */ void ftrace_kill(void); void ftrace_kill_atomic(void); static inline void tracer_disable(void) { #ifdef CONFIG_FTRACE ftrace_enabled = 0; #endif } #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)) # define CALLER_ADDR6 ((unsigned long)__builtin_return_address(6)) #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 # define CALLER_ADDR6 0UL #endif #ifdef CONFIG_IRQSOFF_TRACER extern void time_hardirqs_on(unsigned long a0, unsigned long a1); extern void 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 #ifdef CONFIG_PREEMPT_TRACER extern void trace_preempt_on(unsigned long a0, unsigned long a1); extern void trace_preempt_off(unsigned long a0, unsigned long a1); #else # define trace_preempt_on(a0, a1) do { } while (0) # define trace_preempt_off(a0, a1) do { } while (0) #endif #ifdef CONFIG_TRACING extern void ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3); #else static inline void ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3) { } #endif #endif /* _LINUX_FTRACE_H */