tools/perf/util/map.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __PERF_MAP_H
   3 #define __PERF_MAP_H
   4
   5 #include <linux/refcount.h>
   6 #include <linux/compiler.h>
   7 #include <linux/list.h>
   8 #include <linux/rbtree.h>
   9 #include <stdio.h>
  10 #include <string.h>
  11 #include <stdbool.h>
  12 #include <linux/types.h>
  13
  14 struct dso;
  15 struct maps;
  16 struct machine;
  17
  18 struct map {
  19         union {
  20                 struct rb_node  rb_node;
  21                 struct list_head node;
  22         };
  23         u64                     start;
  24         u64                     end;
  25         bool                    erange_warned:1;
  26         bool                    priv:1;
  27         u32                     prot;
  28         u64                     pgoff;
  29         u64                     reloc;
  30
  31         /* ip -> dso rip */
  32         u64                     (*map_ip)(struct map *, u64);
  33         /* dso rip -> ip */
  34         u64                     (*unmap_ip)(struct map *, u64);
  35
  36         struct dso              *dso;
  37         refcount_t              refcnt;
  38         u32                     flags;
  39 };
  40
  41 struct kmap;
  42
  43 struct kmap *__map__kmap(struct map *map);
  44 struct kmap *map__kmap(struct map *map);
  45 struct maps *map__kmaps(struct map *map);
  46
  47 static inline u64 map__map_ip(struct map *map, u64 ip)
  48 {
  49         return ip - map->start + map->pgoff;
  50 }
  51
  52 static inline u64 map__unmap_ip(struct map *map, u64 ip)
  53 {
  54         return ip + map->start - map->pgoff;
  55 }
  56
  57 static inline u64 identity__map_ip(struct map *map __maybe_unused, u64 ip)
  58 {
  59         return ip;
  60 }
  61
  62 static inline size_t map__size(const struct map *map)
  63 {
  64         return map->end - map->start;
  65 }
  66
  67 /* rip/ip <-> addr suitable for passing to `objdump --start-address=` */
  68 u64 map__rip_2objdump(struct map *map, u64 rip);
  69
  70 /* objdump address -> memory address */
  71 u64 map__objdump_2mem(struct map *map, u64 ip);
  72
  73 struct symbol;
  74 struct thread;
  75
  76 /* map__for_each_symbol - iterate over the symbols in the given map
  77  *
  78  * @map: the 'struct map *' in which symbols itereated
  79  * @pos: the 'struct symbol *' to use as a loop cursor
  80  * @n: the 'struct rb_node *' to use as a temporary storage
  81  * Note: caller must ensure map->dso is not NULL (map is loaded).
  82  */
  83 #define map__for_each_symbol(map, pos, n)       \
  84         dso__for_each_symbol(map->dso, pos, n)
  85
  86 /* map__for_each_symbol_with_name - iterate over the symbols in the given map
  87  *                                  that have the given name
  88  *
  89  * @map: the 'struct map *' in which symbols itereated
  90  * @sym_name: the symbol name
  91  * @pos: the 'struct symbol *' to use as a loop cursor
  92  */
  93 #define __map__for_each_symbol_by_name(map, sym_name, pos)      \
  94         for (pos = map__find_symbol_by_name(map, sym_name);     \
  95              pos &&                                             \
  96              !symbol__match_symbol_name(pos->name, sym_name,    \
  97                                         SYMBOL_TAG_INCLUDE__DEFAULT_ONLY); \
  98              pos = symbol__next_by_name(pos))
  99
 100 #define map__for_each_symbol_by_name(map, sym_name, pos)                \
 101         __map__for_each_symbol_by_name(map, sym_name, (pos))
 102
 103 void map__init(struct map *map,
 104                u64 start, u64 end, u64 pgoff, struct dso *dso);
 105
 106 struct dso_id;
 107
 108 struct map *map__new(struct machine *machine, u64 start, u64 len,
 109                      u64 pgoff, struct dso_id *id, u32 prot, u32 flags,
 110                      char *filename, struct thread *thread);
 111 struct map *map__new2(u64 start, struct dso *dso);
 112 void map__delete(struct map *map);
 113 struct map *map__clone(struct map *map);
 114
 115 static inline struct map *map__get(struct map *map)
 116 {
 117         if (map)
 118                 refcount_inc(&map->refcnt);
 119         return map;
 120 }
 121
 122 void map__put(struct map *map);
 123
 124 static inline void __map__zput(struct map **map)
 125 {
 126         map__put(*map);
 127         *map = NULL;
 128 }
 129
 130 #define map__zput(map) __map__zput(&map)
 131
 132 size_t map__fprintf(struct map *map, FILE *fp);
 133 size_t map__fprintf_dsoname(struct map *map, FILE *fp);
 134 char *map__srcline(struct map *map, u64 addr, struct symbol *sym);
 135 int map__fprintf_srcline(struct map *map, u64 addr, const char *prefix,
 136                          FILE *fp);
 137
 138 int map__load(struct map *map);
 139 struct symbol *map__find_symbol(struct map *map, u64 addr);
 140 struct symbol *map__find_symbol_by_name(struct map *map, const char *name);
 141 void map__fixup_start(struct map *map);
 142 void map__fixup_end(struct map *map);
 143
 144 int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name,
 145                                     u64 addr);
 146
 147 bool __map__is_kernel(const struct map *map);
 148 bool __map__is_extra_kernel_map(const struct map *map);
 149 bool __map__is_bpf_prog(const struct map *map);
 150 bool __map__is_bpf_image(const struct map *map);
 151 bool __map__is_ool(const struct map *map);
 152
 153 static inline bool __map__is_kmodule(const struct map *map)
 154 {
 155         return !__map__is_kernel(map) && !__map__is_extra_kernel_map(map) &&
 156                !__map__is_bpf_prog(map) && !__map__is_ool(map) &&
 157                !__map__is_bpf_image(map);
 158 }
 159
 160 bool map__has_symbols(const struct map *map);
 161
 162 #define ENTRY_TRAMPOLINE_NAME "__entry_SYSCALL_64_trampoline"
 163
 164 static inline bool is_entry_trampoline(const char *name)
 165 {
 166         return !strcmp(name, ENTRY_TRAMPOLINE_NAME);
 167 }
 168
 169 static inline bool is_bpf_image(const char *name)
 170 {
 171         return strncmp(name, "bpf_trampoline_", sizeof("bpf_trampoline_") - 1) == 0 ||
 172                strncmp(name, "bpf_dispatcher_", sizeof("bpf_dispatcher_") - 1) == 0;
 173 }
 174
 175 static inline int is_anon_memory(const char *filename)
 176 {
 177         return !strcmp(filename, "//anon") ||
 178                !strncmp(filename, "/dev/zero", sizeof("/dev/zero") - 1) ||
 179                !strncmp(filename, "/anon_hugepage", sizeof("/anon_hugepage") - 1);
 180 }
 181
 182 static inline int is_no_dso_memory(const char *filename)
 183 {
 184         return !strncmp(filename, "[stack", 6) ||
 185                !strncmp(filename, "/SYSV", 5)  ||
 186                !strcmp(filename, "[heap]");
 187 }
 188 #endif /* __PERF_MAP_H */