xref: /openbmc/linux/tools/perf/util/unwind.h (revision 3dfed9102694227aa763b9984c50d72de796d39b)
171ad0f5eSJiri Olsa #ifndef __UNWIND_H
271ad0f5eSJiri Olsa #define __UNWIND_H
371ad0f5eSJiri Olsa 
4*3dfed910SArnaldo Carvalho de Melo #include <linux/compiler.h>
5d944c4eeSBorislav Petkov #include <linux/types.h>
6*3dfed910SArnaldo Carvalho de Melo 
7*3dfed910SArnaldo Carvalho de Melo struct map;
8*3dfed910SArnaldo Carvalho de Melo struct perf_sample;
9*3dfed910SArnaldo Carvalho de Melo struct symbol;
10*3dfed910SArnaldo Carvalho de Melo struct thread;
1171ad0f5eSJiri Olsa 
1271ad0f5eSJiri Olsa struct unwind_entry {
1371ad0f5eSJiri Olsa 	struct map	*map;
1471ad0f5eSJiri Olsa 	struct symbol	*sym;
1571ad0f5eSJiri Olsa 	u64		ip;
1671ad0f5eSJiri Olsa };
1771ad0f5eSJiri Olsa 
1871ad0f5eSJiri Olsa typedef int (*unwind_entry_cb_t)(struct unwind_entry *entry, void *arg);
1971ad0f5eSJiri Olsa 
20f83c0415SHe Kuang struct unwind_libunwind_ops {
21f83c0415SHe Kuang 	int (*prepare_access)(struct thread *thread);
22f83c0415SHe Kuang 	void (*flush_access)(struct thread *thread);
23f83c0415SHe Kuang 	void (*finish_access)(struct thread *thread);
24f83c0415SHe Kuang 	int (*get_entries)(unwind_entry_cb_t cb, void *arg,
25f83c0415SHe Kuang 			   struct thread *thread,
26f83c0415SHe Kuang 			   struct perf_sample *data, int max_stack);
27f83c0415SHe Kuang };
28f83c0415SHe Kuang 
299ff125d1SJiri Olsa #ifdef HAVE_DWARF_UNWIND_SUPPORT
3071ad0f5eSJiri Olsa int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
3171ad0f5eSJiri Olsa 			struct thread *thread,
3237676af1SArnaldo Carvalho de Melo 			struct perf_sample *data, int max_stack);
339ff125d1SJiri Olsa /* libunwind specific */
349ff125d1SJiri Olsa #ifdef HAVE_LIBUNWIND_SUPPORT
35eeb118c5SHe Kuang #ifndef LIBUNWIND__ARCH_REG_ID
36eeb118c5SHe Kuang #define LIBUNWIND__ARCH_REG_ID(regnum) libunwind__arch_reg_id(regnum)
37eeb118c5SHe Kuang #endif
3878ff1d6dSHe Kuang 
3978ff1d6dSHe Kuang #ifndef LIBUNWIND__ARCH_REG_SP
4078ff1d6dSHe Kuang #define LIBUNWIND__ARCH_REG_SP PERF_REG_SP
4178ff1d6dSHe Kuang #endif
4278ff1d6dSHe Kuang 
4378ff1d6dSHe Kuang #ifndef LIBUNWIND__ARCH_REG_IP
4478ff1d6dSHe Kuang #define LIBUNWIND__ARCH_REG_IP PERF_REG_IP
4578ff1d6dSHe Kuang #endif
4678ff1d6dSHe Kuang 
47eeb118c5SHe Kuang int LIBUNWIND__ARCH_REG_ID(int regnum);
48a2873325SJiri Olsa int unwind__prepare_access(struct thread *thread, struct map *map,
49a2873325SJiri Olsa 			   bool *initialized);
50380b5143SNamhyung Kim void unwind__flush_access(struct thread *thread);
5166f066d8SNamhyung Kim void unwind__finish_access(struct thread *thread);
5266f066d8SNamhyung Kim #else
53d64ec10eSHe Kuang static inline int unwind__prepare_access(struct thread *thread __maybe_unused,
54a2873325SJiri Olsa 					 struct map *map __maybe_unused,
55a2873325SJiri Olsa 					 bool *initialized __maybe_unused)
5666f066d8SNamhyung Kim {
5766f066d8SNamhyung Kim 	return 0;
5866f066d8SNamhyung Kim }
5966f066d8SNamhyung Kim 
60380b5143SNamhyung Kim static inline void unwind__flush_access(struct thread *thread __maybe_unused) {}
6166f066d8SNamhyung Kim static inline void unwind__finish_access(struct thread *thread __maybe_unused) {}
629ff125d1SJiri Olsa #endif
6371ad0f5eSJiri Olsa #else
6471ad0f5eSJiri Olsa static inline int
651d037ca1SIrina Tirdea unwind__get_entries(unwind_entry_cb_t cb __maybe_unused,
661d037ca1SIrina Tirdea 		    void *arg __maybe_unused,
671d037ca1SIrina Tirdea 		    struct thread *thread __maybe_unused,
6837676af1SArnaldo Carvalho de Melo 		    struct perf_sample *data __maybe_unused,
6937676af1SArnaldo Carvalho de Melo 		    int max_stack __maybe_unused)
7071ad0f5eSJiri Olsa {
7171ad0f5eSJiri Olsa 	return 0;
7271ad0f5eSJiri Olsa }
7366f066d8SNamhyung Kim 
74d64ec10eSHe Kuang static inline int unwind__prepare_access(struct thread *thread __maybe_unused,
75a2873325SJiri Olsa 					 struct map *map __maybe_unused,
76a2873325SJiri Olsa 					 bool *initialized __maybe_unused)
7766f066d8SNamhyung Kim {
7866f066d8SNamhyung Kim 	return 0;
7966f066d8SNamhyung Kim }
8066f066d8SNamhyung Kim 
81380b5143SNamhyung Kim static inline void unwind__flush_access(struct thread *thread __maybe_unused) {}
8266f066d8SNamhyung Kim static inline void unwind__finish_access(struct thread *thread __maybe_unused) {}
839ff125d1SJiri Olsa #endif /* HAVE_DWARF_UNWIND_SUPPORT */
8471ad0f5eSJiri Olsa #endif /* __UNWIND_H */
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