/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __PERF_MAP_H
#define __PERF_MAP_H

#include <linux/refcount.h>
#include <linux/compiler.h>
#include <linux/list.h>
#include <linux/rbtree.h>
#include <pthread.h>
#include <stdio.h>
#include <stdbool.h>
#include <linux/types.h>
#include "rwsem.h"

enum map_type {
        MAP__FUNCTION = 0,
        MAP__VARIABLE,
};

#define MAP__NR_TYPES (MAP__VARIABLE + 1)

extern const char *map_type__name[MAP__NR_TYPES];

struct dso;
struct ip_callchain;
struct ref_reloc_sym;
struct map_groups;
struct machine;
struct perf_evsel;

struct map {
        union {
                struct rb_node  rb_node;
                struct list_head node;
        };
        u64                     start;
        u64                     end;
        u8 /* enum map_type */  type;
        bool                    erange_warned;
        u32                     priv;
        u32                     prot;
        u32                     flags;
        u64                     pgoff;
        u64                     reloc;
        u32                     maj, min; /* only valid for MMAP2 record */
        u64                     ino;      /* only valid for MMAP2 record */
        u64                     ino_generation;/* only valid for MMAP2 record */

        /* ip -> dso rip */
        u64                     (*map_ip)(struct map *, u64);
        /* dso rip -> ip */
        u64                     (*unmap_ip)(struct map *, u64);

        struct dso              *dso;
        struct map_groups       *groups;
        refcount_t              refcnt;
};

struct kmap {
        struct ref_reloc_sym    *ref_reloc_sym;
        struct map_groups       *kmaps;
};

struct maps {
        struct rb_root   entries;
        struct rw_semaphore lock;
};

struct map_groups {
        struct maps      maps[MAP__NR_TYPES];
        struct machine   *machine;
        refcount_t       refcnt;
};

struct map_groups *map_groups__new(struct machine *machine);
void map_groups__delete(struct map_groups *mg);
bool map_groups__empty(struct map_groups *mg);

static inline struct map_groups *map_groups__get(struct map_groups *mg)
{
        if (mg)
                refcount_inc(&mg->refcnt);
        return mg;
}

void map_groups__put(struct map_groups *mg);

struct kmap *map__kmap(struct map *map);
struct map_groups *map__kmaps(struct map *map);

static inline u64 map__map_ip(struct map *map, u64 ip)
{
        return ip - map->start + map->pgoff;
}

static inline u64 map__unmap_ip(struct map *map, u64 ip)
{
        return ip + map->start - map->pgoff;
}

static inline u64 identity__map_ip(struct map *map __maybe_unused, u64 ip)
{
        return ip;
}

static inline size_t map__size(const struct map *map)
{
        return map->end - map->start;
}

/* rip/ip <-> addr suitable for passing to `objdump --start-address=` */
u64 map__rip_2objdump(struct map *map, u64 rip);

/* objdump address -> memory address */
u64 map__objdump_2mem(struct map *map, u64 ip);

struct symbol;
struct thread;

/* map__for_each_symbol - iterate over the symbols in the given map
 *
 * @map: the 'struct map *' in which symbols itereated
 * @pos: the 'struct symbol *' to use as a loop cursor
 * @n: the 'struct rb_node *' to use as a temporary storage
 * Note: caller must ensure map->dso is not NULL (map is loaded).
 */
#define map__for_each_symbol(map, pos, n)       \
        dso__for_each_symbol(map->dso, pos, n, map->type)

/* map__for_each_symbol_with_name - iterate over the symbols in the given map
 *                                  that have the given name
 *
 * @map: the 'struct map *' in which symbols itereated
 * @sym_name: the symbol name
 * @pos: the 'struct symbol *' to use as a loop cursor
 */
#define __map__for_each_symbol_by_name(map, sym_name, pos)      \
        for (pos = map__find_symbol_by_name(map, sym_name);     \
             pos &&                                             \
             !symbol__match_symbol_name(pos->name, sym_name,    \
                                        SYMBOL_TAG_INCLUDE__DEFAULT_ONLY); \
             pos = symbol__next_by_name(pos))

#define map__for_each_symbol_by_name(map, sym_name, pos)                \
        __map__for_each_symbol_by_name(map, sym_name, (pos))

void map__init(struct map *map, enum map_type type,
               u64 start, u64 end, u64 pgoff, struct dso *dso);
struct map *map__new(struct machine *machine, u64 start, u64 len,
                     u64 pgoff, u32 d_maj, u32 d_min, u64 ino,
                     u64 ino_gen, u32 prot, u32 flags,
                     char *filename, enum map_type type, struct thread *thread);
struct map *map__new2(u64 start, struct dso *dso, enum map_type type);
void map__delete(struct map *map);
struct map *map__clone(struct map *map);

static inline struct map *map__get(struct map *map)
{
        if (map)
                refcount_inc(&map->refcnt);
        return map;
}

void map__put(struct map *map);

static inline void __map__zput(struct map **map)
{
        map__put(*map);
        *map = NULL;
}

#define map__zput(map) __map__zput(&map)

int map__overlap(struct map *l, struct map *r);
size_t map__fprintf(struct map *map, FILE *fp);
size_t map__fprintf_dsoname(struct map *map, FILE *fp);
int map__fprintf_srcline(struct map *map, u64 addr, const char *prefix,
                         FILE *fp);

int map__load(struct map *map);
struct symbol *map__find_symbol(struct map *map, u64 addr);
struct symbol *map__find_symbol_by_name(struct map *map, const char *name);
void map__fixup_start(struct map *map);
void map__fixup_end(struct map *map);

void map__reloc_vmlinux(struct map *map);

size_t __map_groups__fprintf_maps(struct map_groups *mg, enum map_type type,
                                  FILE *fp);
void maps__insert(struct maps *maps, struct map *map);
void maps__remove(struct maps *maps, struct map *map);
struct map *maps__find(struct maps *maps, u64 addr);
struct map *maps__first(struct maps *maps);
struct map *map__next(struct map *map);
struct symbol *maps__find_symbol_by_name(struct maps *maps, const char *name,
                                         struct map **mapp);
void map_groups__init(struct map_groups *mg, struct machine *machine);
void map_groups__exit(struct map_groups *mg);
int map_groups__clone(struct thread *thread,
                      struct map_groups *parent, enum map_type type);
size_t map_groups__fprintf(struct map_groups *mg, FILE *fp);

int maps__set_kallsyms_ref_reloc_sym(struct map **maps, const char *symbol_name,
                                     u64 addr);

static inline void map_groups__insert(struct map_groups *mg, struct map *map)
{
        maps__insert(&mg->maps[map->type], map);
        map->groups = mg;
}

static inline void map_groups__remove(struct map_groups *mg, struct map *map)
{
        maps__remove(&mg->maps[map->type], map);
}

static inline struct map *map_groups__find(struct map_groups *mg,
                                           enum map_type type, u64 addr)
{
        return maps__find(&mg->maps[type], addr);
}

static inline struct map *map_groups__first(struct map_groups *mg,
                                            enum map_type type)
{
        return maps__first(&mg->maps[type]);
}

static inline struct map *map_groups__next(struct map *map)
{
        return map__next(map);
}

struct symbol *map_groups__find_symbol(struct map_groups *mg,
                                       enum map_type type, u64 addr,
                                       struct map **mapp);

struct symbol *map_groups__find_symbol_by_name(struct map_groups *mg,
                                               enum map_type type,
                                               const char *name,
                                               struct map **mapp);

struct addr_map_symbol;

int map_groups__find_ams(struct addr_map_symbol *ams);

static inline
struct symbol *map_groups__find_function_by_name(struct map_groups *mg,
                                                 const char *name, struct map **mapp)
{
        return map_groups__find_symbol_by_name(mg, MAP__FUNCTION, name, mapp);
}

int map_groups__fixup_overlappings(struct map_groups *mg, struct map *map,
                                   FILE *fp);

struct map *map_groups__find_by_name(struct map_groups *mg,
                                     enum map_type type, const char *name);

bool __map__is_kernel(const struct map *map);

static inline bool __map__is_kmodule(const struct map *map)
{
        return !__map__is_kernel(map);
}

#endif /* __PERF_MAP_H */