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