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 9struct maps; 10struct perf_sample; 11struct thread; 12 13struct unwind_entry { 14 struct map_symbol ms; 15 u64 ip; 16}; 17 18typedef int (*unwind_entry_cb_t)(struct unwind_entry *entry, void *arg); 19 20struct unwind_libunwind_ops { 21 int (*prepare_access)(struct maps *maps); 22 void (*flush_access)(struct maps *maps); 23 void (*finish_access)(struct maps *maps); 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 30int 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 47int LIBUNWIND__ARCH_REG_ID(int regnum); 48int unwind__prepare_access(struct maps *maps, struct map *map, bool *initialized); 49void unwind__flush_access(struct maps *maps); 50void unwind__finish_access(struct maps *maps); 51#else 52static inline int unwind__prepare_access(struct maps *maps __maybe_unused, 53 struct map *map __maybe_unused, 54 bool *initialized __maybe_unused) 55{ 56 return 0; 57} 58 59static inline void unwind__flush_access(struct maps *maps __maybe_unused) {} 60static inline void unwind__finish_access(struct maps *maps __maybe_unused) {} 61#endif 62#else 63static inline int 64unwind__get_entries(unwind_entry_cb_t cb __maybe_unused, 65 void *arg __maybe_unused, 66 struct thread *thread __maybe_unused, 67 struct perf_sample *data __maybe_unused, 68 int max_stack __maybe_unused) 69{ 70 return 0; 71} 72 73static inline int unwind__prepare_access(struct maps *maps __maybe_unused, 74 struct map *map __maybe_unused, 75 bool *initialized __maybe_unused) 76{ 77 return 0; 78} 79 80static inline void unwind__flush_access(struct maps *maps __maybe_unused) {} 81static inline void unwind__finish_access(struct maps *maps __maybe_unused) {} 82#endif /* HAVE_DWARF_UNWIND_SUPPORT */ 83#endif /* __UNWIND_H */ 84