| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | #ifndef _LINUX_KERNEL_FTRACE_INTERNAL_H |
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| 3 | #define _LINUX_KERNEL_FTRACE_INTERNAL_H |
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| 4 | |
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| 5 | int __register_ftrace_function(struct ftrace_ops *ops); |
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| 6 | int __unregister_ftrace_function(struct ftrace_ops *ops); |
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| 7 | |
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| 8 | #ifdef CONFIG_FUNCTION_TRACER |
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| 9 | |
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| 10 | extern struct mutex ftrace_lock; |
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| 11 | extern struct ftrace_ops global_ops; |
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| 12 | |
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| 13 | #ifdef CONFIG_DYNAMIC_FTRACE |
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| 14 | |
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| 15 | int ftrace_startup(struct ftrace_ops *ops, int command); |
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| 16 | int ftrace_shutdown(struct ftrace_ops *ops, int command); |
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| 17 | int ftrace_ops_test(struct ftrace_ops *ops, unsigned long ip, void *regs); |
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| 18 | int ftrace_startup_subops(struct ftrace_ops *ops, struct ftrace_ops *subops, int command); |
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| 19 | int ftrace_shutdown_subops(struct ftrace_ops *ops, struct ftrace_ops *subops, int command); |
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| 20 | |
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| 21 | #else /* !CONFIG_DYNAMIC_FTRACE */ |
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| 22 | |
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| 23 | /* Keep as macros so we do not need to define the commands */ |
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| 24 | # define ftrace_startup(ops, command) \ |
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| 25 | ({ \ |
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| 26 | int ___ret = __register_ftrace_function(ops); \ |
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| 27 | if (!___ret) \ |
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| 28 | (ops)->flags |= FTRACE_OPS_FL_ENABLED; \ |
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| 29 | ___ret; \ |
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| 30 | }) |
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| 31 | # define ftrace_shutdown(ops, command) \ |
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| 32 | ({ \ |
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| 33 | int ___ret = __unregister_ftrace_function(ops); \ |
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| 34 | if (!___ret) \ |
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| 35 | (ops)->flags &= ~FTRACE_OPS_FL_ENABLED; \ |
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| 36 | ___ret; \ |
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| 37 | }) |
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| 38 | static inline int |
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| 39 | ftrace_ops_test(struct ftrace_ops *ops, unsigned long ip, void *regs) |
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| 40 | { |
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| 41 | return 1; |
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| 42 | } |
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| 43 | static inline int ftrace_startup_subops(struct ftrace_ops *ops, struct ftrace_ops *subops, int command) |
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| 44 | { |
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| 45 | return -EINVAL; |
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| 46 | } |
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| 47 | static inline int ftrace_shutdown_subops(struct ftrace_ops *ops, struct ftrace_ops *subops, int command) |
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| 48 | { |
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| 49 | return -EINVAL; |
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| 50 | } |
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| 51 | #endif /* CONFIG_DYNAMIC_FTRACE */ |
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| 52 | |
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| 53 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
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| 54 | extern int ftrace_graph_active; |
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| 55 | # ifdef CONFIG_DYNAMIC_FTRACE |
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| 56 | extern void fgraph_update_pid_func(void); |
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| 57 | # else |
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| 58 | static inline void fgraph_update_pid_func(void) {} |
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| 59 | # endif |
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| 60 | #else /* !CONFIG_FUNCTION_GRAPH_TRACER */ |
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| 61 | # define ftrace_graph_active 0 |
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| 62 | static inline void fgraph_update_pid_func(void) {} |
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| 63 | #endif /* CONFIG_FUNCTION_GRAPH_TRACER */ |
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| 64 | |
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| 65 | #else /* !CONFIG_FUNCTION_TRACER */ |
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| 66 | #endif /* CONFIG_FUNCTION_TRACER */ |
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| 67 | |
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| 68 | #endif |
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| 69 | |
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