v4.19.13 snapshot.
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
new file mode 100644
index 0000000..6a6929f
--- /dev/null
+++ b/tools/perf/util/map.c
@@ -0,0 +1,918 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "symbol.h"
+#include <errno.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
+#include "map.h"
+#include "thread.h"
+#include "vdso.h"
+#include "build-id.h"
+#include "util.h"
+#include "debug.h"
+#include "machine.h"
+#include <linux/string.h>
+#include "srcline.h"
+#include "namespaces.h"
+#include "unwind.h"
+
+static void __maps__insert(struct maps *maps, struct map *map);
+
+static inline int is_anon_memory(const char *filename, u32 flags)
+{
+ return flags & MAP_HUGETLB ||
+ !strcmp(filename, "//anon") ||
+ !strncmp(filename, "/dev/zero", sizeof("/dev/zero") - 1) ||
+ !strncmp(filename, "/anon_hugepage", sizeof("/anon_hugepage") - 1);
+}
+
+static inline int is_no_dso_memory(const char *filename)
+{
+ return !strncmp(filename, "[stack", 6) ||
+ !strncmp(filename, "/SYSV",5) ||
+ !strcmp(filename, "[heap]");
+}
+
+static inline int is_android_lib(const char *filename)
+{
+ return !strncmp(filename, "/data/app-lib", 13) ||
+ !strncmp(filename, "/system/lib", 11);
+}
+
+static inline bool replace_android_lib(const char *filename, char *newfilename)
+{
+ const char *libname;
+ char *app_abi;
+ size_t app_abi_length, new_length;
+ size_t lib_length = 0;
+
+ libname = strrchr(filename, '/');
+ if (libname)
+ lib_length = strlen(libname);
+
+ app_abi = getenv("APP_ABI");
+ if (!app_abi)
+ return false;
+
+ app_abi_length = strlen(app_abi);
+
+ if (!strncmp(filename, "/data/app-lib", 13)) {
+ char *apk_path;
+
+ if (!app_abi_length)
+ return false;
+
+ new_length = 7 + app_abi_length + lib_length;
+
+ apk_path = getenv("APK_PATH");
+ if (apk_path) {
+ new_length += strlen(apk_path) + 1;
+ if (new_length > PATH_MAX)
+ return false;
+ snprintf(newfilename, new_length,
+ "%s/libs/%s/%s", apk_path, app_abi, libname);
+ } else {
+ if (new_length > PATH_MAX)
+ return false;
+ snprintf(newfilename, new_length,
+ "libs/%s/%s", app_abi, libname);
+ }
+ return true;
+ }
+
+ if (!strncmp(filename, "/system/lib/", 11)) {
+ char *ndk, *app;
+ const char *arch;
+ size_t ndk_length;
+ size_t app_length;
+
+ ndk = getenv("NDK_ROOT");
+ app = getenv("APP_PLATFORM");
+
+ if (!(ndk && app))
+ return false;
+
+ ndk_length = strlen(ndk);
+ app_length = strlen(app);
+
+ if (!(ndk_length && app_length && app_abi_length))
+ return false;
+
+ arch = !strncmp(app_abi, "arm", 3) ? "arm" :
+ !strncmp(app_abi, "mips", 4) ? "mips" :
+ !strncmp(app_abi, "x86", 3) ? "x86" : NULL;
+
+ if (!arch)
+ return false;
+
+ new_length = 27 + ndk_length +
+ app_length + lib_length
+ + strlen(arch);
+
+ if (new_length > PATH_MAX)
+ return false;
+ snprintf(newfilename, new_length,
+ "%s/platforms/%s/arch-%s/usr/lib/%s",
+ ndk, app, arch, libname);
+
+ return true;
+ }
+ return false;
+}
+
+void map__init(struct map *map, u64 start, u64 end, u64 pgoff, struct dso *dso)
+{
+ map->start = start;
+ map->end = end;
+ map->pgoff = pgoff;
+ map->reloc = 0;
+ map->dso = dso__get(dso);
+ map->map_ip = map__map_ip;
+ map->unmap_ip = map__unmap_ip;
+ RB_CLEAR_NODE(&map->rb_node);
+ map->groups = NULL;
+ map->erange_warned = false;
+ refcount_set(&map->refcnt, 1);
+}
+
+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,
+ struct thread *thread)
+{
+ struct map *map = malloc(sizeof(*map));
+ struct nsinfo *nsi = NULL;
+ struct nsinfo *nnsi;
+
+ if (map != NULL) {
+ char newfilename[PATH_MAX];
+ struct dso *dso;
+ int anon, no_dso, vdso, android;
+
+ android = is_android_lib(filename);
+ anon = is_anon_memory(filename, flags);
+ vdso = is_vdso_map(filename);
+ no_dso = is_no_dso_memory(filename);
+
+ map->maj = d_maj;
+ map->min = d_min;
+ map->ino = ino;
+ map->ino_generation = ino_gen;
+ map->prot = prot;
+ map->flags = flags;
+ nsi = nsinfo__get(thread->nsinfo);
+
+ if ((anon || no_dso) && nsi && (prot & PROT_EXEC)) {
+ snprintf(newfilename, sizeof(newfilename),
+ "/tmp/perf-%d.map", nsi->pid);
+ filename = newfilename;
+ }
+
+ if (android) {
+ if (replace_android_lib(filename, newfilename))
+ filename = newfilename;
+ }
+
+ if (vdso) {
+ /* The vdso maps are always on the host and not the
+ * container. Ensure that we don't use setns to look
+ * them up.
+ */
+ nnsi = nsinfo__copy(nsi);
+ if (nnsi) {
+ nsinfo__put(nsi);
+ nnsi->need_setns = false;
+ nsi = nnsi;
+ }
+ pgoff = 0;
+ dso = machine__findnew_vdso(machine, thread);
+ } else
+ dso = machine__findnew_dso(machine, filename);
+
+ if (dso == NULL)
+ goto out_delete;
+
+ map__init(map, start, start + len, pgoff, dso);
+
+ if (anon || no_dso) {
+ map->map_ip = map->unmap_ip = identity__map_ip;
+
+ /*
+ * Set memory without DSO as loaded. All map__find_*
+ * functions still return NULL, and we avoid the
+ * unnecessary map__load warning.
+ */
+ if (!(prot & PROT_EXEC))
+ dso__set_loaded(dso);
+ }
+ dso->nsinfo = nsi;
+ dso__put(dso);
+ }
+ return map;
+out_delete:
+ nsinfo__put(nsi);
+ free(map);
+ return NULL;
+}
+
+/*
+ * Constructor variant for modules (where we know from /proc/modules where
+ * they are loaded) and for vmlinux, where only after we load all the
+ * symbols we'll know where it starts and ends.
+ */
+struct map *map__new2(u64 start, struct dso *dso)
+{
+ struct map *map = calloc(1, (sizeof(*map) +
+ (dso->kernel ? sizeof(struct kmap) : 0)));
+ if (map != NULL) {
+ /*
+ * ->end will be filled after we load all the symbols
+ */
+ map__init(map, start, 0, 0, dso);
+ }
+
+ return map;
+}
+
+/*
+ * Use this and __map__is_kmodule() for map instances that are in
+ * machine->kmaps, and thus have map->groups->machine all properly set, to
+ * disambiguate between the kernel and modules.
+ *
+ * When the need arises, introduce map__is_{kernel,kmodule)() that
+ * checks (map->groups != NULL && map->groups->machine != NULL &&
+ * map->dso->kernel) before calling __map__is_{kernel,kmodule}())
+ */
+bool __map__is_kernel(const struct map *map)
+{
+ return machine__kernel_map(map->groups->machine) == map;
+}
+
+bool __map__is_extra_kernel_map(const struct map *map)
+{
+ struct kmap *kmap = __map__kmap((struct map *)map);
+
+ return kmap && kmap->name[0];
+}
+
+bool map__has_symbols(const struct map *map)
+{
+ return dso__has_symbols(map->dso);
+}
+
+static void map__exit(struct map *map)
+{
+ BUG_ON(!RB_EMPTY_NODE(&map->rb_node));
+ dso__zput(map->dso);
+}
+
+void map__delete(struct map *map)
+{
+ map__exit(map);
+ free(map);
+}
+
+void map__put(struct map *map)
+{
+ if (map && refcount_dec_and_test(&map->refcnt))
+ map__delete(map);
+}
+
+void map__fixup_start(struct map *map)
+{
+ struct rb_root *symbols = &map->dso->symbols;
+ struct rb_node *nd = rb_first(symbols);
+ if (nd != NULL) {
+ struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
+ map->start = sym->start;
+ }
+}
+
+void map__fixup_end(struct map *map)
+{
+ struct rb_root *symbols = &map->dso->symbols;
+ struct rb_node *nd = rb_last(symbols);
+ if (nd != NULL) {
+ struct symbol *sym = rb_entry(nd, struct symbol, rb_node);
+ map->end = sym->end;
+ }
+}
+
+#define DSO__DELETED "(deleted)"
+
+int map__load(struct map *map)
+{
+ const char *name = map->dso->long_name;
+ int nr;
+
+ if (dso__loaded(map->dso))
+ return 0;
+
+ nr = dso__load(map->dso, map);
+ if (nr < 0) {
+ if (map->dso->has_build_id) {
+ char sbuild_id[SBUILD_ID_SIZE];
+
+ build_id__sprintf(map->dso->build_id,
+ sizeof(map->dso->build_id),
+ sbuild_id);
+ pr_warning("%s with build id %s not found",
+ name, sbuild_id);
+ } else
+ pr_warning("Failed to open %s", name);
+
+ pr_warning(", continuing without symbols\n");
+ return -1;
+ } else if (nr == 0) {
+#ifdef HAVE_LIBELF_SUPPORT
+ const size_t len = strlen(name);
+ const size_t real_len = len - sizeof(DSO__DELETED);
+
+ if (len > sizeof(DSO__DELETED) &&
+ strcmp(name + real_len + 1, DSO__DELETED) == 0) {
+ pr_warning("%.*s was updated (is prelink enabled?). "
+ "Restart the long running apps that use it!\n",
+ (int)real_len, name);
+ } else {
+ pr_warning("no symbols found in %s, maybe install "
+ "a debug package?\n", name);
+ }
+#endif
+ return -1;
+ }
+
+ return 0;
+}
+
+struct symbol *map__find_symbol(struct map *map, u64 addr)
+{
+ if (map__load(map) < 0)
+ return NULL;
+
+ return dso__find_symbol(map->dso, addr);
+}
+
+struct symbol *map__find_symbol_by_name(struct map *map, const char *name)
+{
+ if (map__load(map) < 0)
+ return NULL;
+
+ if (!dso__sorted_by_name(map->dso))
+ dso__sort_by_name(map->dso);
+
+ return dso__find_symbol_by_name(map->dso, name);
+}
+
+struct map *map__clone(struct map *from)
+{
+ struct map *map = memdup(from, sizeof(*map));
+
+ if (map != NULL) {
+ refcount_set(&map->refcnt, 1);
+ RB_CLEAR_NODE(&map->rb_node);
+ dso__get(map->dso);
+ map->groups = NULL;
+ }
+
+ return map;
+}
+
+size_t map__fprintf(struct map *map, FILE *fp)
+{
+ return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %" PRIx64 " %s\n",
+ map->start, map->end, map->pgoff, map->dso->name);
+}
+
+size_t map__fprintf_dsoname(struct map *map, FILE *fp)
+{
+ const char *dsoname = "[unknown]";
+
+ if (map && map->dso) {
+ if (symbol_conf.show_kernel_path && map->dso->long_name)
+ dsoname = map->dso->long_name;
+ else
+ dsoname = map->dso->name;
+ }
+
+ return fprintf(fp, "%s", dsoname);
+}
+
+char *map__srcline(struct map *map, u64 addr, struct symbol *sym)
+{
+ if (map == NULL)
+ return SRCLINE_UNKNOWN;
+ return get_srcline(map->dso, map__rip_2objdump(map, addr), sym, true, true, addr);
+}
+
+int map__fprintf_srcline(struct map *map, u64 addr, const char *prefix,
+ FILE *fp)
+{
+ int ret = 0;
+
+ if (map && map->dso) {
+ char *srcline = map__srcline(map, addr, NULL);
+ if (srcline != SRCLINE_UNKNOWN)
+ ret = fprintf(fp, "%s%s", prefix, srcline);
+ free_srcline(srcline);
+ }
+ return ret;
+}
+
+/**
+ * map__rip_2objdump - convert symbol start address to objdump address.
+ * @map: memory map
+ * @rip: symbol start address
+ *
+ * objdump wants/reports absolute IPs for ET_EXEC, and RIPs for ET_DYN.
+ * map->dso->adjust_symbols==1 for ET_EXEC-like cases except ET_REL which is
+ * relative to section start.
+ *
+ * Return: Address suitable for passing to "objdump --start-address="
+ */
+u64 map__rip_2objdump(struct map *map, u64 rip)
+{
+ struct kmap *kmap = __map__kmap(map);
+
+ /*
+ * vmlinux does not have program headers for PTI entry trampolines and
+ * kcore may not either. However the trampoline object code is on the
+ * main kernel map, so just use that instead.
+ */
+ if (kmap && is_entry_trampoline(kmap->name) && kmap->kmaps && kmap->kmaps->machine) {
+ struct map *kernel_map = machine__kernel_map(kmap->kmaps->machine);
+
+ if (kernel_map)
+ map = kernel_map;
+ }
+
+ if (!map->dso->adjust_symbols)
+ return rip;
+
+ if (map->dso->rel)
+ return rip - map->pgoff;
+
+ /*
+ * kernel modules also have DSO_TYPE_USER in dso->kernel,
+ * but all kernel modules are ET_REL, so won't get here.
+ */
+ if (map->dso->kernel == DSO_TYPE_USER)
+ return rip + map->dso->text_offset;
+
+ return map->unmap_ip(map, rip) - map->reloc;
+}
+
+/**
+ * map__objdump_2mem - convert objdump address to a memory address.
+ * @map: memory map
+ * @ip: objdump address
+ *
+ * Closely related to map__rip_2objdump(), this function takes an address from
+ * objdump and converts it to a memory address. Note this assumes that @map
+ * contains the address. To be sure the result is valid, check it forwards
+ * e.g. map__rip_2objdump(map->map_ip(map, map__objdump_2mem(map, ip))) == ip
+ *
+ * Return: Memory address.
+ */
+u64 map__objdump_2mem(struct map *map, u64 ip)
+{
+ if (!map->dso->adjust_symbols)
+ return map->unmap_ip(map, ip);
+
+ if (map->dso->rel)
+ return map->unmap_ip(map, ip + map->pgoff);
+
+ /*
+ * kernel modules also have DSO_TYPE_USER in dso->kernel,
+ * but all kernel modules are ET_REL, so won't get here.
+ */
+ if (map->dso->kernel == DSO_TYPE_USER)
+ return map->unmap_ip(map, ip - map->dso->text_offset);
+
+ return ip + map->reloc;
+}
+
+static void maps__init(struct maps *maps)
+{
+ maps->entries = RB_ROOT;
+ init_rwsem(&maps->lock);
+}
+
+void map_groups__init(struct map_groups *mg, struct machine *machine)
+{
+ maps__init(&mg->maps);
+ mg->machine = machine;
+ refcount_set(&mg->refcnt, 1);
+}
+
+static void __maps__purge(struct maps *maps)
+{
+ struct rb_root *root = &maps->entries;
+ struct rb_node *next = rb_first(root);
+
+ while (next) {
+ struct map *pos = rb_entry(next, struct map, rb_node);
+
+ next = rb_next(&pos->rb_node);
+ rb_erase_init(&pos->rb_node, root);
+ map__put(pos);
+ }
+}
+
+static void maps__exit(struct maps *maps)
+{
+ down_write(&maps->lock);
+ __maps__purge(maps);
+ up_write(&maps->lock);
+}
+
+void map_groups__exit(struct map_groups *mg)
+{
+ maps__exit(&mg->maps);
+}
+
+bool map_groups__empty(struct map_groups *mg)
+{
+ return !maps__first(&mg->maps);
+}
+
+struct map_groups *map_groups__new(struct machine *machine)
+{
+ struct map_groups *mg = malloc(sizeof(*mg));
+
+ if (mg != NULL)
+ map_groups__init(mg, machine);
+
+ return mg;
+}
+
+void map_groups__delete(struct map_groups *mg)
+{
+ map_groups__exit(mg);
+ free(mg);
+}
+
+void map_groups__put(struct map_groups *mg)
+{
+ if (mg && refcount_dec_and_test(&mg->refcnt))
+ map_groups__delete(mg);
+}
+
+struct symbol *map_groups__find_symbol(struct map_groups *mg,
+ u64 addr, struct map **mapp)
+{
+ struct map *map = map_groups__find(mg, addr);
+
+ /* Ensure map is loaded before using map->map_ip */
+ if (map != NULL && map__load(map) >= 0) {
+ if (mapp != NULL)
+ *mapp = map;
+ return map__find_symbol(map, map->map_ip(map, addr));
+ }
+
+ return NULL;
+}
+
+static bool map__contains_symbol(struct map *map, struct symbol *sym)
+{
+ u64 ip = map->unmap_ip(map, sym->start);
+
+ return ip >= map->start && ip < map->end;
+}
+
+struct symbol *maps__find_symbol_by_name(struct maps *maps, const char *name,
+ struct map **mapp)
+{
+ struct symbol *sym;
+ struct rb_node *nd;
+
+ down_read(&maps->lock);
+
+ for (nd = rb_first(&maps->entries); nd; nd = rb_next(nd)) {
+ struct map *pos = rb_entry(nd, struct map, rb_node);
+
+ sym = map__find_symbol_by_name(pos, name);
+
+ if (sym == NULL)
+ continue;
+ if (!map__contains_symbol(pos, sym)) {
+ sym = NULL;
+ continue;
+ }
+ if (mapp != NULL)
+ *mapp = pos;
+ goto out;
+ }
+
+ sym = NULL;
+out:
+ up_read(&maps->lock);
+ return sym;
+}
+
+struct symbol *map_groups__find_symbol_by_name(struct map_groups *mg,
+ const char *name,
+ struct map **mapp)
+{
+ return maps__find_symbol_by_name(&mg->maps, name, mapp);
+}
+
+int map_groups__find_ams(struct addr_map_symbol *ams)
+{
+ if (ams->addr < ams->map->start || ams->addr >= ams->map->end) {
+ if (ams->map->groups == NULL)
+ return -1;
+ ams->map = map_groups__find(ams->map->groups, ams->addr);
+ if (ams->map == NULL)
+ return -1;
+ }
+
+ ams->al_addr = ams->map->map_ip(ams->map, ams->addr);
+ ams->sym = map__find_symbol(ams->map, ams->al_addr);
+
+ return ams->sym ? 0 : -1;
+}
+
+static size_t maps__fprintf(struct maps *maps, FILE *fp)
+{
+ size_t printed = 0;
+ struct rb_node *nd;
+
+ down_read(&maps->lock);
+
+ for (nd = rb_first(&maps->entries); nd; nd = rb_next(nd)) {
+ struct map *pos = rb_entry(nd, struct map, rb_node);
+ printed += fprintf(fp, "Map:");
+ printed += map__fprintf(pos, fp);
+ if (verbose > 2) {
+ printed += dso__fprintf(pos->dso, fp);
+ printed += fprintf(fp, "--\n");
+ }
+ }
+
+ up_read(&maps->lock);
+
+ return printed;
+}
+
+size_t map_groups__fprintf(struct map_groups *mg, FILE *fp)
+{
+ return maps__fprintf(&mg->maps, fp);
+}
+
+static void __map_groups__insert(struct map_groups *mg, struct map *map)
+{
+ __maps__insert(&mg->maps, map);
+ map->groups = mg;
+}
+
+static int maps__fixup_overlappings(struct maps *maps, struct map *map, FILE *fp)
+{
+ struct rb_root *root;
+ struct rb_node *next, *first;
+ int err = 0;
+
+ down_write(&maps->lock);
+
+ root = &maps->entries;
+
+ /*
+ * Find first map where end > map->start.
+ * Same as find_vma() in kernel.
+ */
+ next = root->rb_node;
+ first = NULL;
+ while (next) {
+ struct map *pos = rb_entry(next, struct map, rb_node);
+
+ if (pos->end > map->start) {
+ first = next;
+ if (pos->start <= map->start)
+ break;
+ next = next->rb_left;
+ } else
+ next = next->rb_right;
+ }
+
+ next = first;
+ while (next) {
+ struct map *pos = rb_entry(next, struct map, rb_node);
+ next = rb_next(&pos->rb_node);
+
+ /*
+ * Stop if current map starts after map->end.
+ * Maps are ordered by start: next will not overlap for sure.
+ */
+ if (pos->start >= map->end)
+ break;
+
+ if (verbose >= 2) {
+
+ if (use_browser) {
+ pr_warning("overlapping maps in %s "
+ "(disable tui for more info)\n",
+ map->dso->name);
+ } else {
+ fputs("overlapping maps:\n", fp);
+ map__fprintf(map, fp);
+ map__fprintf(pos, fp);
+ }
+ }
+
+ rb_erase_init(&pos->rb_node, root);
+ /*
+ * Now check if we need to create new maps for areas not
+ * overlapped by the new map:
+ */
+ if (map->start > pos->start) {
+ struct map *before = map__clone(pos);
+
+ if (before == NULL) {
+ err = -ENOMEM;
+ goto put_map;
+ }
+
+ before->end = map->start;
+ __map_groups__insert(pos->groups, before);
+ if (verbose >= 2 && !use_browser)
+ map__fprintf(before, fp);
+ map__put(before);
+ }
+
+ if (map->end < pos->end) {
+ struct map *after = map__clone(pos);
+
+ if (after == NULL) {
+ err = -ENOMEM;
+ goto put_map;
+ }
+
+ after->start = map->end;
+ __map_groups__insert(pos->groups, after);
+ if (verbose >= 2 && !use_browser)
+ map__fprintf(after, fp);
+ map__put(after);
+ }
+put_map:
+ map__put(pos);
+
+ if (err)
+ goto out;
+ }
+
+ err = 0;
+out:
+ up_write(&maps->lock);
+ return err;
+}
+
+int map_groups__fixup_overlappings(struct map_groups *mg, struct map *map,
+ FILE *fp)
+{
+ return maps__fixup_overlappings(&mg->maps, map, fp);
+}
+
+/*
+ * XXX This should not really _copy_ te maps, but refcount them.
+ */
+int map_groups__clone(struct thread *thread, struct map_groups *parent)
+{
+ struct map_groups *mg = thread->mg;
+ int err = -ENOMEM;
+ struct map *map;
+ struct maps *maps = &parent->maps;
+
+ down_read(&maps->lock);
+
+ for (map = maps__first(maps); map; map = map__next(map)) {
+ struct map *new = map__clone(map);
+ if (new == NULL)
+ goto out_unlock;
+
+ err = unwind__prepare_access(thread, new, NULL);
+ if (err)
+ goto out_unlock;
+
+ map_groups__insert(mg, new);
+ map__put(new);
+ }
+
+ err = 0;
+out_unlock:
+ up_read(&maps->lock);
+ return err;
+}
+
+static void __maps__insert(struct maps *maps, struct map *map)
+{
+ struct rb_node **p = &maps->entries.rb_node;
+ struct rb_node *parent = NULL;
+ const u64 ip = map->start;
+ struct map *m;
+
+ while (*p != NULL) {
+ parent = *p;
+ m = rb_entry(parent, struct map, rb_node);
+ if (ip < m->start)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+
+ rb_link_node(&map->rb_node, parent, p);
+ rb_insert_color(&map->rb_node, &maps->entries);
+ map__get(map);
+}
+
+void maps__insert(struct maps *maps, struct map *map)
+{
+ down_write(&maps->lock);
+ __maps__insert(maps, map);
+ up_write(&maps->lock);
+}
+
+static void __maps__remove(struct maps *maps, struct map *map)
+{
+ rb_erase_init(&map->rb_node, &maps->entries);
+ map__put(map);
+}
+
+void maps__remove(struct maps *maps, struct map *map)
+{
+ down_write(&maps->lock);
+ __maps__remove(maps, map);
+ up_write(&maps->lock);
+}
+
+struct map *maps__find(struct maps *maps, u64 ip)
+{
+ struct rb_node **p, *parent = NULL;
+ struct map *m;
+
+ down_read(&maps->lock);
+
+ p = &maps->entries.rb_node;
+ while (*p != NULL) {
+ parent = *p;
+ m = rb_entry(parent, struct map, rb_node);
+ if (ip < m->start)
+ p = &(*p)->rb_left;
+ else if (ip >= m->end)
+ p = &(*p)->rb_right;
+ else
+ goto out;
+ }
+
+ m = NULL;
+out:
+ up_read(&maps->lock);
+ return m;
+}
+
+struct map *maps__first(struct maps *maps)
+{
+ struct rb_node *first = rb_first(&maps->entries);
+
+ if (first)
+ return rb_entry(first, struct map, rb_node);
+ return NULL;
+}
+
+struct map *map__next(struct map *map)
+{
+ struct rb_node *next = rb_next(&map->rb_node);
+
+ if (next)
+ return rb_entry(next, struct map, rb_node);
+ return NULL;
+}
+
+struct kmap *__map__kmap(struct map *map)
+{
+ if (!map->dso || !map->dso->kernel)
+ return NULL;
+ return (struct kmap *)(map + 1);
+}
+
+struct kmap *map__kmap(struct map *map)
+{
+ struct kmap *kmap = __map__kmap(map);
+
+ if (!kmap)
+ pr_err("Internal error: map__kmap with a non-kernel map\n");
+ return kmap;
+}
+
+struct map_groups *map__kmaps(struct map *map)
+{
+ struct kmap *kmap = map__kmap(map);
+
+ if (!kmap || !kmap->kmaps) {
+ pr_err("Internal error: map__kmaps with a non-kernel map\n");
+ return NULL;
+ }
+ return kmap->kmaps;
+}