1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __UNWIND_H 3 #define __UNWIND_H 4 5 #include <linux/compiler.h> 6 #include <linux/types.h> 7 8 struct map; 9 struct perf_sample; 10 struct symbol; 11 struct thread; 12 13 struct unwind_entry { 14 struct map *map; 15 struct symbol *sym; 16 u64 ip; 17 }; 18 19 typedef int (*unwind_entry_cb_t)(struct unwind_entry *entry, void *arg); 20 21 struct unwind_libunwind_ops { 22 int (*prepare_access)(struct thread *thread); 23 void (*flush_access)(struct thread *thread); 24 void (*finish_access)(struct thread *thread); 25 int (*get_entries)(unwind_entry_cb_t cb, void *arg, 26 struct thread *thread, 27 struct perf_sample *data, int max_stack); 28 }; 29 30 #ifdef HAVE_DWARF_UNWIND_SUPPORT 31 int unwind__get_entries(unwind_entry_cb_t cb, void *arg, 32 struct thread *thread, 33 struct perf_sample *data, int max_stack); 34 /* libunwind specific */ 35 #ifdef HAVE_LIBUNWIND_SUPPORT 36 #ifndef LIBUNWIND__ARCH_REG_ID 37 #define LIBUNWIND__ARCH_REG_ID(regnum) libunwind__arch_reg_id(regnum) 38 #endif 39 40 #ifndef LIBUNWIND__ARCH_REG_SP 41 #define LIBUNWIND__ARCH_REG_SP PERF_REG_SP 42 #endif 43 44 #ifndef LIBUNWIND__ARCH_REG_IP 45 #define LIBUNWIND__ARCH_REG_IP PERF_REG_IP 46 #endif 47 48 int LIBUNWIND__ARCH_REG_ID(int regnum); 49 int unwind__prepare_access(struct thread *thread, struct map *map, 50 bool *initialized); 51 void unwind__flush_access(struct thread *thread); 52 void unwind__finish_access(struct thread *thread); 53 #else 54 static inline int unwind__prepare_access(struct thread *thread __maybe_unused, 55 struct map *map __maybe_unused, 56 bool *initialized __maybe_unused) 57 { 58 return 0; 59 } 60 61 static inline void unwind__flush_access(struct thread *thread __maybe_unused) {} 62 static inline void unwind__finish_access(struct thread *thread __maybe_unused) {} 63 #endif 64 #else 65 static inline int 66 unwind__get_entries(unwind_entry_cb_t cb __maybe_unused, 67 void *arg __maybe_unused, 68 struct thread *thread __maybe_unused, 69 struct perf_sample *data __maybe_unused, 70 int max_stack __maybe_unused) 71 { 72 return 0; 73 } 74 75 static inline int unwind__prepare_access(struct thread *thread __maybe_unused, 76 struct map *map __maybe_unused, 77 bool *initialized __maybe_unused) 78 { 79 return 0; 80 } 81 82 static inline void unwind__flush_access(struct thread *thread __maybe_unused) {} 83 static inline void unwind__finish_access(struct thread *thread __maybe_unused) {} 84 #endif /* HAVE_DWARF_UNWIND_SUPPORT */ 85 #endif /* __UNWIND_H */ 86