blob: 3f09a23f71b4207b4ac24f521e520bf5847ab7f8 [file] [log] [blame]
Arnaldo Carvalho de Melo5aab6212010-03-25 19:59:00 -03001#define _GNU_SOURCE
2#include <ctype.h>
3#include <dirent.h>
4#include <errno.h>
5#include <libgen.h>
6#include <stdlib.h>
7#include <stdio.h>
8#include <string.h>
9#include <sys/types.h>
10#include <sys/stat.h>
11#include <sys/param.h>
12#include <fcntl.h>
13#include <unistd.h>
Arnaldo Carvalho de Melo9486aa32011-01-22 20:37:02 -020014#include <inttypes.h>
Arnaldo Carvalho de Melob36f19d2010-05-20 12:15:33 -030015#include "build-id.h"
Arnaldo Carvalho de Melo8a6c5b22010-07-20 14:42:52 -030016#include "debug.h"
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -030017#include "symbol.h"
Arnaldo Carvalho de Melo5aab6212010-03-25 19:59:00 -030018#include "strlist.h"
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -030019
20#include <libelf.h>
21#include <gelf.h>
22#include <elf.h>
Arnaldo Carvalho de Melof1617b42009-11-18 20:20:52 -020023#include <limits.h>
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -030024#include <sys/utsname.h>
Peter Zijlstra2cdbc462009-08-05 14:05:16 +020025
Arnaldo Carvalho de Melo3b01a412010-12-22 01:08:36 -020026#ifndef KSYM_NAME_LEN
27#define KSYM_NAME_LEN 128
28#endif
29
Arnaldo Carvalho de Meloc12e15e2009-11-21 14:31:25 -020030#ifndef NT_GNU_BUILD_ID
31#define NT_GNU_BUILD_ID 3
32#endif
33
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -030034static bool dso__build_id_equal(const struct dso *dso, u8 *build_id);
Dave Martin21916c32010-07-30 09:08:08 -030035static int elf_read_build_id(Elf *elf, void *bf, size_t size);
Arnaldo Carvalho de Melob0da9542009-11-27 16:29:14 -020036static void dsos__add(struct list_head *head, struct dso *dso);
Arnaldo Carvalho de Melo36105832009-11-27 16:29:16 -020037static struct map *map__new2(u64 start, struct dso *dso, enum map_type type);
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -030038static int dso__load_kernel_sym(struct dso *dso, struct map *map,
Arnaldo Carvalho de Melo9de89fe2010-02-03 16:52:00 -020039 symbol_filter_t filter);
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -030040static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map,
Zhang, Yanmina1645ce2010-04-19 13:32:50 +080041 symbol_filter_t filter);
Arnaldo Carvalho de Melocc612d82009-11-23 16:39:10 -020042static int vmlinux_path__nr_entries;
43static char **vmlinux_path;
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -030044
Arnaldo Carvalho de Melo75be6cf2009-12-15 20:04:39 -020045struct symbol_conf symbol_conf = {
Arnaldo Carvalho de Melod599db32009-12-15 20:04:42 -020046 .exclude_other = true,
Arnaldo Carvalho de Melob32d1332009-11-24 12:05:15 -020047 .use_modules = true,
48 .try_vmlinux_path = true,
Stephane Eranian3e6a2a72011-05-17 17:32:07 +020049 .annotate_src = true,
David Ahernec5761e2010-12-09 13:27:07 -070050 .symfs = "",
Arnaldo Carvalho de Melob32d1332009-11-24 12:05:15 -020051};
52
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -030053int dso__name_len(const struct dso *dso)
Arnaldo Carvalho de Melo8a6c5b22010-07-20 14:42:52 -030054{
55 if (verbose)
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -030056 return dso->long_name_len;
Arnaldo Carvalho de Melo8a6c5b22010-07-20 14:42:52 -030057
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -030058 return dso->short_name_len;
Arnaldo Carvalho de Melo8a6c5b22010-07-20 14:42:52 -030059}
60
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -030061bool dso__loaded(const struct dso *dso, enum map_type type)
Arnaldo Carvalho de Melo36105832009-11-27 16:29:16 -020062{
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -030063 return dso->loaded & (1 << type);
Arnaldo Carvalho de Melo36105832009-11-27 16:29:16 -020064}
65
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -030066bool dso__sorted_by_name(const struct dso *dso, enum map_type type)
Arnaldo Carvalho de Melo79406cd2009-12-11 18:50:22 -020067{
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -030068 return dso->sorted_by_name & (1 << type);
Arnaldo Carvalho de Melo79406cd2009-12-11 18:50:22 -020069}
70
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -030071static void dso__set_sorted_by_name(struct dso *dso, enum map_type type)
Arnaldo Carvalho de Melo79406cd2009-12-11 18:50:22 -020072{
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -030073 dso->sorted_by_name |= (1 << type);
Arnaldo Carvalho de Melo79406cd2009-12-11 18:50:22 -020074}
75
Arnaldo Carvalho de Melo36a3e642010-01-04 16:19:27 -020076bool symbol_type__is_a(char symbol_type, enum map_type map_type)
Arnaldo Carvalho de Melo6893d4e2009-12-11 14:50:37 -020077{
Anton Blanchard31877902011-08-24 16:40:16 +100078 symbol_type = toupper(symbol_type);
79
Arnaldo Carvalho de Melo6893d4e2009-12-11 14:50:37 -020080 switch (map_type) {
81 case MAP__FUNCTION:
82 return symbol_type == 'T' || symbol_type == 'W';
Arnaldo Carvalho de Melof1dfa0b2009-12-11 14:50:39 -020083 case MAP__VARIABLE:
Anton Blanchard31877902011-08-24 16:40:16 +100084 return symbol_type == 'D';
Arnaldo Carvalho de Melo6893d4e2009-12-11 14:50:37 -020085 default:
86 return false;
87 }
88}
89
Anton Blanchard694bf402011-08-24 16:40:17 +100090static int prefix_underscores_count(const char *str)
91{
92 const char *tail = str;
93
94 while (*tail == '_')
95 tail++;
96
97 return tail - str;
98}
99
100#define SYMBOL_A 0
101#define SYMBOL_B 1
102
103static int choose_best_symbol(struct symbol *syma, struct symbol *symb)
104{
105 s64 a;
106 s64 b;
107
108 /* Prefer a symbol with non zero length */
109 a = syma->end - syma->start;
110 b = symb->end - symb->start;
111 if ((b == 0) && (a > 0))
112 return SYMBOL_A;
113 else if ((a == 0) && (b > 0))
114 return SYMBOL_B;
115
116 /* Prefer a non weak symbol over a weak one */
117 a = syma->binding == STB_WEAK;
118 b = symb->binding == STB_WEAK;
119 if (b && !a)
120 return SYMBOL_A;
121 if (a && !b)
122 return SYMBOL_B;
123
124 /* Prefer a global symbol over a non global one */
125 a = syma->binding == STB_GLOBAL;
126 b = symb->binding == STB_GLOBAL;
127 if (a && !b)
128 return SYMBOL_A;
129 if (b && !a)
130 return SYMBOL_B;
131
132 /* Prefer a symbol with less underscores */
133 a = prefix_underscores_count(syma->name);
134 b = prefix_underscores_count(symb->name);
135 if (b > a)
136 return SYMBOL_A;
137 else if (a > b)
138 return SYMBOL_B;
139
140 /* If all else fails, choose the symbol with the longest name */
141 if (strlen(syma->name) >= strlen(symb->name))
142 return SYMBOL_A;
143 else
144 return SYMBOL_B;
145}
146
147static void symbols__fixup_duplicate(struct rb_root *symbols)
148{
149 struct rb_node *nd;
150 struct symbol *curr, *next;
151
152 nd = rb_first(symbols);
153
154 while (nd) {
155 curr = rb_entry(nd, struct symbol, rb_node);
156again:
157 nd = rb_next(&curr->rb_node);
158 next = rb_entry(nd, struct symbol, rb_node);
159
160 if (!nd)
161 break;
162
163 if (curr->start != next->start)
164 continue;
165
166 if (choose_best_symbol(curr, next) == SYMBOL_A) {
167 rb_erase(&next->rb_node, symbols);
168 goto again;
169 } else {
170 nd = rb_next(&curr->rb_node);
171 rb_erase(&curr->rb_node, symbols);
172 }
173 }
174}
175
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300176static void symbols__fixup_end(struct rb_root *symbols)
Arnaldo Carvalho de Meloaf427bf2009-10-05 14:26:17 -0300177{
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300178 struct rb_node *nd, *prevnd = rb_first(symbols);
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -0300179 struct symbol *curr, *prev;
Arnaldo Carvalho de Meloaf427bf2009-10-05 14:26:17 -0300180
181 if (prevnd == NULL)
182 return;
183
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -0300184 curr = rb_entry(prevnd, struct symbol, rb_node);
185
Arnaldo Carvalho de Meloaf427bf2009-10-05 14:26:17 -0300186 for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) {
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -0300187 prev = curr;
188 curr = rb_entry(nd, struct symbol, rb_node);
Arnaldo Carvalho de Meloaf427bf2009-10-05 14:26:17 -0300189
Arnaldo Carvalho de Melo3b01a412010-12-22 01:08:36 -0200190 if (prev->end == prev->start && prev->end != curr->start)
Arnaldo Carvalho de Meloaf427bf2009-10-05 14:26:17 -0300191 prev->end = curr->start - 1;
Arnaldo Carvalho de Meloaf427bf2009-10-05 14:26:17 -0300192 }
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -0300193
194 /* Last entry */
195 if (curr->end == curr->start)
196 curr->end = roundup(curr->start, 4096);
Arnaldo Carvalho de Meloaf427bf2009-10-05 14:26:17 -0300197}
198
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300199static void __map_groups__fixup_end(struct map_groups *mg, enum map_type type)
Arnaldo Carvalho de Meloaf427bf2009-10-05 14:26:17 -0300200{
201 struct map *prev, *curr;
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300202 struct rb_node *nd, *prevnd = rb_first(&mg->maps[type]);
Arnaldo Carvalho de Meloaf427bf2009-10-05 14:26:17 -0300203
204 if (prevnd == NULL)
205 return;
206
207 curr = rb_entry(prevnd, struct map, rb_node);
Arnaldo Carvalho de Meloaf427bf2009-10-05 14:26:17 -0300208
209 for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) {
210 prev = curr;
211 curr = rb_entry(nd, struct map, rb_node);
212 prev->end = curr->start - 1;
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -0300213 }
Arnaldo Carvalho de Melo90c83212009-11-21 14:31:24 -0200214
215 /*
216 * We still haven't the actual symbols, so guess the
217 * last map final address.
218 */
Ian Munsie9d1faba2010-11-25 15:12:53 +1100219 curr->end = ~0ULL;
Arnaldo Carvalho de Meloaf427bf2009-10-05 14:26:17 -0300220}
221
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300222static void map_groups__fixup_end(struct map_groups *mg)
Arnaldo Carvalho de Melo23ea4a32009-11-27 16:29:19 -0200223{
224 int i;
225 for (i = 0; i < MAP__NR_TYPES; ++i)
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300226 __map_groups__fixup_end(mg, i);
Arnaldo Carvalho de Melo23ea4a32009-11-27 16:29:19 -0200227}
228
Arnaldo Carvalho de Meloc408fed2010-08-05 12:59:47 -0300229static struct symbol *symbol__new(u64 start, u64 len, u8 binding,
230 const char *name)
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300231{
Arnaldo Carvalho de Melo0085c9542009-05-28 14:55:13 -0300232 size_t namelen = strlen(name) + 1;
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300233 struct symbol *sym = calloc(1, (symbol_conf.priv_size +
234 sizeof(*sym) + namelen));
235 if (sym == NULL)
Ingo Molnar0b73da32009-06-06 15:48:52 +0200236 return NULL;
237
Arnaldo Carvalho de Melo75be6cf2009-12-15 20:04:39 -0200238 if (symbol_conf.priv_size)
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300239 sym = ((void *)sym) + symbol_conf.priv_size;
Arnaldo Carvalho de Melo36479482009-11-24 12:05:16 -0200240
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300241 sym->start = start;
242 sym->end = len ? start + len - 1 : start;
243 sym->binding = binding;
244 sym->namelen = namelen - 1;
Arnaldo Carvalho de Meloe4204992009-10-20 14:25:40 -0200245
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300246 pr_debug4("%s: %s %#" PRIx64 "-%#" PRIx64 "\n",
247 __func__, name, start, sym->end);
248 memcpy(sym->name, name, namelen);
Arnaldo Carvalho de Meloe4204992009-10-20 14:25:40 -0200249
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300250 return sym;
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300251}
252
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300253void symbol__delete(struct symbol *sym)
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300254{
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300255 free(((void *)sym) - symbol_conf.priv_size);
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300256}
257
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300258static size_t symbol__fprintf(struct symbol *sym, FILE *fp)
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300259{
Arnaldo Carvalho de Melo9486aa32011-01-22 20:37:02 -0200260 return fprintf(fp, " %" PRIx64 "-%" PRIx64 " %c %s\n",
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300261 sym->start, sym->end,
262 sym->binding == STB_GLOBAL ? 'g' :
263 sym->binding == STB_LOCAL ? 'l' : 'w',
264 sym->name);
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300265}
266
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300267void dso__set_long_name(struct dso *dso, char *name)
Arnaldo Carvalho de Melocfc10d32009-11-17 15:40:53 -0200268{
Arnaldo Carvalho de Meloef6ae722009-11-20 20:51:29 -0200269 if (name == NULL)
270 return;
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300271 dso->long_name = name;
272 dso->long_name_len = strlen(name);
Arnaldo Carvalho de Melocfc10d32009-11-17 15:40:53 -0200273}
274
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300275static void dso__set_short_name(struct dso *dso, const char *name)
Arnaldo Carvalho de Melob63be8d2010-03-15 15:03:50 -0300276{
277 if (name == NULL)
278 return;
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300279 dso->short_name = name;
280 dso->short_name_len = strlen(name);
Arnaldo Carvalho de Melob63be8d2010-03-15 15:03:50 -0300281}
282
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300283static void dso__set_basename(struct dso *dso)
Arnaldo Carvalho de Melocfc10d32009-11-17 15:40:53 -0200284{
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300285 dso__set_short_name(dso, basename(dso->long_name));
Arnaldo Carvalho de Melocfc10d32009-11-17 15:40:53 -0200286}
287
Arnaldo Carvalho de Melo00a192b2009-10-30 16:28:24 -0200288struct dso *dso__new(const char *name)
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300289{
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300290 struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1);
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300291
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300292 if (dso != NULL) {
Arnaldo Carvalho de Melo6a4694a2009-11-27 16:29:17 -0200293 int i;
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300294 strcpy(dso->name, name);
295 dso__set_long_name(dso, dso->name);
296 dso__set_short_name(dso, dso->name);
Arnaldo Carvalho de Melo6a4694a2009-11-27 16:29:17 -0200297 for (i = 0; i < MAP__NR_TYPES; ++i)
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300298 dso->symbols[i] = dso->symbol_names[i] = RB_ROOT;
299 dso->symtab_type = SYMTAB__NOT_FOUND;
300 dso->loaded = 0;
301 dso->sorted_by_name = 0;
302 dso->has_build_id = 0;
303 dso->kernel = DSO_TYPE_USER;
304 INIT_LIST_HEAD(&dso->node);
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300305 }
306
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300307 return dso;
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300308}
309
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300310static void symbols__delete(struct rb_root *symbols)
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300311{
312 struct symbol *pos;
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300313 struct rb_node *next = rb_first(symbols);
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300314
315 while (next) {
316 pos = rb_entry(next, struct symbol, rb_node);
317 next = rb_next(&pos->rb_node);
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300318 rb_erase(&pos->rb_node, symbols);
Arnaldo Carvalho de Melo00a192b2009-10-30 16:28:24 -0200319 symbol__delete(pos);
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300320 }
321}
322
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300323void dso__delete(struct dso *dso)
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300324{
Arnaldo Carvalho de Melo6a4694a2009-11-27 16:29:17 -0200325 int i;
326 for (i = 0; i < MAP__NR_TYPES; ++i)
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300327 symbols__delete(&dso->symbols[i]);
328 if (dso->sname_alloc)
329 free((char *)dso->short_name);
330 if (dso->lname_alloc)
331 free(dso->long_name);
332 free(dso);
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300333}
334
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300335void dso__set_build_id(struct dso *dso, void *build_id)
Arnaldo Carvalho de Melo8d063672009-11-04 18:50:43 -0200336{
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300337 memcpy(dso->build_id, build_id, sizeof(dso->build_id));
338 dso->has_build_id = 1;
Arnaldo Carvalho de Melo8d063672009-11-04 18:50:43 -0200339}
340
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300341static void symbols__insert(struct rb_root *symbols, struct symbol *sym)
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300342{
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300343 struct rb_node **p = &symbols->rb_node;
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300344 struct rb_node *parent = NULL;
Paul Mackerras9cffa8d2009-06-19 22:21:42 +1000345 const u64 ip = sym->start;
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300346 struct symbol *s;
347
348 while (*p != NULL) {
349 parent = *p;
350 s = rb_entry(parent, struct symbol, rb_node);
351 if (ip < s->start)
352 p = &(*p)->rb_left;
353 else
354 p = &(*p)->rb_right;
355 }
356 rb_link_node(&sym->rb_node, parent, p);
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300357 rb_insert_color(&sym->rb_node, symbols);
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300358}
359
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300360static struct symbol *symbols__find(struct rb_root *symbols, u64 ip)
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300361{
362 struct rb_node *n;
363
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300364 if (symbols == NULL)
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300365 return NULL;
366
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300367 n = symbols->rb_node;
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300368
369 while (n) {
370 struct symbol *s = rb_entry(n, struct symbol, rb_node);
371
372 if (ip < s->start)
373 n = n->rb_left;
374 else if (ip > s->end)
375 n = n->rb_right;
376 else
377 return s;
378 }
379
380 return NULL;
381}
382
Arnaldo Carvalho de Melo79406cd2009-12-11 18:50:22 -0200383struct symbol_name_rb_node {
384 struct rb_node rb_node;
385 struct symbol sym;
386};
387
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300388static void symbols__insert_by_name(struct rb_root *symbols, struct symbol *sym)
Arnaldo Carvalho de Melo79406cd2009-12-11 18:50:22 -0200389{
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300390 struct rb_node **p = &symbols->rb_node;
Arnaldo Carvalho de Melo79406cd2009-12-11 18:50:22 -0200391 struct rb_node *parent = NULL;
Rabin Vincent02a9d032010-11-23 22:08:18 +0530392 struct symbol_name_rb_node *symn, *s;
393
394 symn = container_of(sym, struct symbol_name_rb_node, sym);
Arnaldo Carvalho de Melo79406cd2009-12-11 18:50:22 -0200395
396 while (*p != NULL) {
397 parent = *p;
398 s = rb_entry(parent, struct symbol_name_rb_node, rb_node);
399 if (strcmp(sym->name, s->sym.name) < 0)
400 p = &(*p)->rb_left;
401 else
402 p = &(*p)->rb_right;
403 }
404 rb_link_node(&symn->rb_node, parent, p);
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300405 rb_insert_color(&symn->rb_node, symbols);
Arnaldo Carvalho de Melo79406cd2009-12-11 18:50:22 -0200406}
407
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300408static void symbols__sort_by_name(struct rb_root *symbols,
409 struct rb_root *source)
Arnaldo Carvalho de Melo79406cd2009-12-11 18:50:22 -0200410{
411 struct rb_node *nd;
412
413 for (nd = rb_first(source); nd; nd = rb_next(nd)) {
414 struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300415 symbols__insert_by_name(symbols, pos);
Arnaldo Carvalho de Melo79406cd2009-12-11 18:50:22 -0200416 }
417}
418
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300419static struct symbol *symbols__find_by_name(struct rb_root *symbols,
420 const char *name)
Arnaldo Carvalho de Melo79406cd2009-12-11 18:50:22 -0200421{
422 struct rb_node *n;
423
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300424 if (symbols == NULL)
Arnaldo Carvalho de Melo79406cd2009-12-11 18:50:22 -0200425 return NULL;
426
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300427 n = symbols->rb_node;
Arnaldo Carvalho de Melo79406cd2009-12-11 18:50:22 -0200428
429 while (n) {
430 struct symbol_name_rb_node *s;
431 int cmp;
432
433 s = rb_entry(n, struct symbol_name_rb_node, rb_node);
434 cmp = strcmp(name, s->sym.name);
435
436 if (cmp < 0)
437 n = n->rb_left;
438 else if (cmp > 0)
439 n = n->rb_right;
440 else
441 return &s->sym;
442 }
443
444 return NULL;
445}
446
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300447struct symbol *dso__find_symbol(struct dso *dso,
Arnaldo Carvalho de Melo79406cd2009-12-11 18:50:22 -0200448 enum map_type type, u64 addr)
Arnaldo Carvalho de Melofcf12032009-11-24 13:01:52 -0200449{
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300450 return symbols__find(&dso->symbols[type], addr);
Arnaldo Carvalho de Melofcf12032009-11-24 13:01:52 -0200451}
452
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300453struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type,
Arnaldo Carvalho de Melo79406cd2009-12-11 18:50:22 -0200454 const char *name)
455{
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300456 return symbols__find_by_name(&dso->symbol_names[type], name);
Arnaldo Carvalho de Melo79406cd2009-12-11 18:50:22 -0200457}
458
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300459void dso__sort_by_name(struct dso *dso, enum map_type type)
Arnaldo Carvalho de Melo79406cd2009-12-11 18:50:22 -0200460{
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300461 dso__set_sorted_by_name(dso, type);
462 return symbols__sort_by_name(&dso->symbol_names[type],
463 &dso->symbols[type]);
Arnaldo Carvalho de Melo79406cd2009-12-11 18:50:22 -0200464}
465
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300466int build_id__sprintf(const u8 *build_id, int len, char *bf)
Arnaldo Carvalho de Melo8d063672009-11-04 18:50:43 -0200467{
468 char *bid = bf;
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300469 const u8 *raw = build_id;
Arnaldo Carvalho de Melo8d063672009-11-04 18:50:43 -0200470 int i;
471
472 for (i = 0; i < len; ++i) {
473 sprintf(bid, "%02x", *raw);
474 ++raw;
475 bid += 2;
476 }
477
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300478 return raw - build_id;
Arnaldo Carvalho de Melo8d063672009-11-04 18:50:43 -0200479}
480
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300481size_t dso__fprintf_buildid(struct dso *dso, FILE *fp)
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300482{
Arnaldo Carvalho de Melo8d063672009-11-04 18:50:43 -0200483 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
Arnaldo Carvalho de Melo8d063672009-11-04 18:50:43 -0200484
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300485 build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id);
Arnaldo Carvalho de Melo9e03eb22009-11-16 16:32:44 -0200486 return fprintf(fp, "%s", sbuild_id);
487}
488
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300489size_t dso__fprintf_symbols_by_name(struct dso *dso,
490 enum map_type type, FILE *fp)
Srikar Dronamraju90f18e62010-08-25 19:13:29 +0530491{
492 size_t ret = 0;
493 struct rb_node *nd;
494 struct symbol_name_rb_node *pos;
495
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300496 for (nd = rb_first(&dso->symbol_names[type]); nd; nd = rb_next(nd)) {
Srikar Dronamraju90f18e62010-08-25 19:13:29 +0530497 pos = rb_entry(nd, struct symbol_name_rb_node, rb_node);
498 fprintf(fp, "%s\n", pos->sym.name);
499 }
500
501 return ret;
502}
503
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300504size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp)
Arnaldo Carvalho de Melo9e03eb22009-11-16 16:32:44 -0200505{
506 struct rb_node *nd;
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300507 size_t ret = fprintf(fp, "dso: %s (", dso->short_name);
Arnaldo Carvalho de Melo9e03eb22009-11-16 16:32:44 -0200508
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300509 if (dso->short_name != dso->long_name)
510 ret += fprintf(fp, "%s, ", dso->long_name);
Arnaldo Carvalho de Melo3846df22010-02-22 16:15:39 -0300511 ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type],
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300512 dso->loaded ? "" : "NOT ");
513 ret += dso__fprintf_buildid(dso, fp);
Arnaldo Carvalho de Melo6a4694a2009-11-27 16:29:17 -0200514 ret += fprintf(fp, ")\n");
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300515 for (nd = rb_first(&dso->symbols[type]); nd; nd = rb_next(nd)) {
Arnaldo Carvalho de Melo95011c62009-11-27 16:29:20 -0200516 struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
517 ret += symbol__fprintf(pos, fp);
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300518 }
519
520 return ret;
521}
522
Arnaldo Carvalho de Melo9e201442010-01-14 18:30:06 -0200523int kallsyms__parse(const char *filename, void *arg,
524 int (*process_symbol)(void *arg, const char *name,
Arnaldo Carvalho de Melo3b01a412010-12-22 01:08:36 -0200525 char type, u64 start, u64 end))
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300526{
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300527 char *line = NULL;
528 size_t n;
Arnaldo Carvalho de Melo3b01a412010-12-22 01:08:36 -0200529 int err = -1;
Arnaldo Carvalho de Melo9e201442010-01-14 18:30:06 -0200530 FILE *file = fopen(filename, "r");
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300531
532 if (file == NULL)
533 goto out_failure;
534
Arnaldo Carvalho de Melo3b01a412010-12-22 01:08:36 -0200535 err = 0;
536
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300537 while (!feof(file)) {
Paul Mackerras9cffa8d2009-06-19 22:21:42 +1000538 u64 start;
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300539 int line_len, len;
540 char symbol_type;
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -0300541 char *symbol_name;
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300542
543 line_len = getline(&line, &n, file);
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800544 if (line_len < 0 || !line)
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300545 break;
546
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300547 line[--line_len] = '\0'; /* \n */
548
Arnaldo Carvalho de Meloa0055ae2009-06-01 17:50:19 -0300549 len = hex2u64(line, &start);
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300550
551 len++;
552 if (len + 2 >= line_len)
553 continue;
554
Anton Blanchard31877902011-08-24 16:40:16 +1000555 symbol_type = line[len];
Arnaldo Carvalho de Melo3b01a412010-12-22 01:08:36 -0200556 len += 2;
557 symbol_name = line + len;
558 len = line_len - len;
Arnaldo Carvalho de Meloaf427bf2009-10-05 14:26:17 -0300559
Arnaldo Carvalho de Melo3b01a412010-12-22 01:08:36 -0200560 if (len >= KSYM_NAME_LEN) {
561 err = -1;
Arnaldo Carvalho de Melo682b3352010-01-04 16:19:26 -0200562 break;
Arnaldo Carvalho de Melo3b01a412010-12-22 01:08:36 -0200563 }
564
Anton Blanchard3f5a4272011-08-24 16:40:15 +1000565 /*
566 * module symbols are not sorted so we add all
567 * symbols with zero length and rely on
568 * symbols__fixup_end() to fix it up.
569 */
570 err = process_symbol(arg, symbol_name,
571 symbol_type, start, start);
572 if (err)
573 break;
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -0300574 }
575
576 free(line);
577 fclose(file);
Arnaldo Carvalho de Melo682b3352010-01-04 16:19:26 -0200578 return err;
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -0300579
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -0300580out_failure:
581 return -1;
582}
583
Arnaldo Carvalho de Melo682b3352010-01-04 16:19:26 -0200584struct process_kallsyms_args {
585 struct map *map;
586 struct dso *dso;
587};
588
Arnaldo Carvalho de Meloc408fed2010-08-05 12:59:47 -0300589static u8 kallsyms2elf_type(char type)
590{
591 if (type == 'W')
592 return STB_WEAK;
593
594 return isupper(type) ? STB_GLOBAL : STB_LOCAL;
595}
596
Arnaldo Carvalho de Melo682b3352010-01-04 16:19:26 -0200597static int map__process_kallsym_symbol(void *arg, const char *name,
Arnaldo Carvalho de Melo3b01a412010-12-22 01:08:36 -0200598 char type, u64 start, u64 end)
Arnaldo Carvalho de Melo682b3352010-01-04 16:19:26 -0200599{
600 struct symbol *sym;
601 struct process_kallsyms_args *a = arg;
602 struct rb_root *root = &a->dso->symbols[a->map->type];
603
604 if (!symbol_type__is_a(type, a->map->type))
605 return 0;
606
Arnaldo Carvalho de Melo3b01a412010-12-22 01:08:36 -0200607 sym = symbol__new(start, end - start + 1,
608 kallsyms2elf_type(type), name);
Arnaldo Carvalho de Melo682b3352010-01-04 16:19:26 -0200609 if (sym == NULL)
610 return -ENOMEM;
611 /*
612 * We will pass the symbols to the filter later, in
613 * map__split_kallsyms, when we have split the maps per module
614 */
615 symbols__insert(root, sym);
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800616
Arnaldo Carvalho de Melo682b3352010-01-04 16:19:26 -0200617 return 0;
618}
619
620/*
621 * Loads the function entries in /proc/kallsyms into kernel_map->dso,
622 * so that we can in the next step set the symbol ->end address and then
623 * call kernel_maps__split_kallsyms.
624 */
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300625static int dso__load_all_kallsyms(struct dso *dso, const char *filename,
Arnaldo Carvalho de Melo9e201442010-01-14 18:30:06 -0200626 struct map *map)
Arnaldo Carvalho de Melo682b3352010-01-04 16:19:26 -0200627{
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300628 struct process_kallsyms_args args = { .map = map, .dso = dso, };
Arnaldo Carvalho de Melo9e201442010-01-14 18:30:06 -0200629 return kallsyms__parse(filename, &args, map__process_kallsym_symbol);
Arnaldo Carvalho de Melo682b3352010-01-04 16:19:26 -0200630}
631
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -0300632/*
633 * Split the symbols into maps, making sure there are no overlaps, i.e. the
634 * kernel range is broken in several maps, named [kernel].N, as we don't have
635 * the original ELF section names vmlinux have.
636 */
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300637static int dso__split_kallsyms(struct dso *dso, struct map *map,
Arnaldo Carvalho de Melo9de89fe2010-02-03 16:52:00 -0200638 symbol_filter_t filter)
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -0300639{
Arnaldo Carvalho de Melo9de89fe2010-02-03 16:52:00 -0200640 struct map_groups *kmaps = map__kmap(map)->kmaps;
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300641 struct machine *machine = kmaps->machine;
Arnaldo Carvalho de Melo4e062552009-11-27 16:29:18 -0200642 struct map *curr_map = map;
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -0300643 struct symbol *pos;
Arnaldo Carvalho de Melo8a953312010-11-29 12:44:15 -0200644 int count = 0, moved = 0;
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300645 struct rb_root *root = &dso->symbols[map->type];
Arnaldo Carvalho de Melo4e062552009-11-27 16:29:18 -0200646 struct rb_node *next = rb_first(root);
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -0300647 int kernel_range = 0;
648
649 while (next) {
650 char *module;
651
652 pos = rb_entry(next, struct symbol, rb_node);
653 next = rb_next(&pos->rb_node);
654
655 module = strchr(pos->name, '\t');
656 if (module) {
Arnaldo Carvalho de Melo75be6cf2009-12-15 20:04:39 -0200657 if (!symbol_conf.use_modules)
Arnaldo Carvalho de Melo1de8e242009-11-27 16:29:21 -0200658 goto discard_symbol;
659
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -0300660 *module++ = '\0';
661
Arnaldo Carvalho de Melob7cece72010-01-13 13:22:17 -0200662 if (strcmp(curr_map->dso->short_name, module)) {
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800663 if (curr_map != map &&
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300664 dso->kernel == DSO_TYPE_GUEST_KERNEL &&
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300665 machine__is_default_guest(machine)) {
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800666 /*
667 * We assume all symbols of a module are
668 * continuous in * kallsyms, so curr_map
669 * points to a module and all its
670 * symbols are in its kmap. Mark it as
671 * loaded.
672 */
673 dso__set_loaded(curr_map->dso,
674 curr_map->type);
Arnaldo Carvalho de Meloaf427bf2009-10-05 14:26:17 -0300675 }
Arnaldo Carvalho de Melob7cece72010-01-13 13:22:17 -0200676
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800677 curr_map = map_groups__find_by_name(kmaps,
678 map->type, module);
679 if (curr_map == NULL) {
Arnaldo Carvalho de Melo2f519032010-05-17 17:57:59 -0300680 pr_debug("%s/proc/{kallsyms,modules} "
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800681 "inconsistency while looking "
682 "for \"%s\" module!\n",
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300683 machine->root_dir, module);
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800684 curr_map = map;
685 goto discard_symbol;
686 }
687
688 if (curr_map->dso->loaded &&
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300689 !machine__is_default_guest(machine))
Arnaldo Carvalho de Melob7cece72010-01-13 13:22:17 -0200690 goto discard_symbol;
Arnaldo Carvalho de Meloaf427bf2009-10-05 14:26:17 -0300691 }
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -0300692 /*
693 * So that we look just like we get from .ko files,
694 * i.e. not prelinked, relative to map->start.
695 */
Arnaldo Carvalho de Melo4e062552009-11-27 16:29:18 -0200696 pos->start = curr_map->map_ip(curr_map, pos->start);
697 pos->end = curr_map->map_ip(curr_map, pos->end);
698 } else if (curr_map != map) {
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -0300699 char dso_name[PATH_MAX];
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300700 struct dso *ndso;
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300701
Arnaldo Carvalho de Melo8a953312010-11-29 12:44:15 -0200702 if (count == 0) {
703 curr_map = map;
704 goto filter_symbol;
705 }
706
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300707 if (dso->kernel == DSO_TYPE_GUEST_KERNEL)
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800708 snprintf(dso_name, sizeof(dso_name),
709 "[guest.kernel].%d",
710 kernel_range++);
711 else
712 snprintf(dso_name, sizeof(dso_name),
713 "[kernel].%d",
714 kernel_range++);
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300715
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300716 ndso = dso__new(dso_name);
717 if (ndso == NULL)
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -0300718 return -1;
719
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300720 ndso->kernel = dso->kernel;
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800721
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300722 curr_map = map__new2(pos->start, ndso, map->type);
Zhang, Yanmin37fe5fc2010-02-25 11:00:51 +0800723 if (curr_map == NULL) {
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300724 dso__delete(ndso);
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -0300725 return -1;
726 }
727
Arnaldo Carvalho de Melo4e062552009-11-27 16:29:18 -0200728 curr_map->map_ip = curr_map->unmap_ip = identity__map_ip;
Arnaldo Carvalho de Melo9de89fe2010-02-03 16:52:00 -0200729 map_groups__insert(kmaps, curr_map);
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -0300730 ++kernel_range;
731 }
Arnaldo Carvalho de Melo8a953312010-11-29 12:44:15 -0200732filter_symbol:
Arnaldo Carvalho de Melo4e062552009-11-27 16:29:18 -0200733 if (filter && filter(curr_map, pos)) {
Arnaldo Carvalho de Melo1de8e242009-11-27 16:29:21 -0200734discard_symbol: rb_erase(&pos->rb_node, root);
Arnaldo Carvalho de Melo00a192b2009-10-30 16:28:24 -0200735 symbol__delete(pos);
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -0300736 } else {
Arnaldo Carvalho de Melo4e062552009-11-27 16:29:18 -0200737 if (curr_map != map) {
738 rb_erase(&pos->rb_node, root);
739 symbols__insert(&curr_map->dso->symbols[curr_map->type], pos);
Arnaldo Carvalho de Melo8a953312010-11-29 12:44:15 -0200740 ++moved;
741 } else
742 ++count;
Mike Galbraith9974f492009-07-02 08:05:58 +0200743 }
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300744 }
745
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800746 if (curr_map != map &&
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300747 dso->kernel == DSO_TYPE_GUEST_KERNEL &&
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -0300748 machine__is_default_guest(kmaps->machine)) {
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800749 dso__set_loaded(curr_map->dso, curr_map->type);
750 }
751
Arnaldo Carvalho de Melo8a953312010-11-29 12:44:15 -0200752 return count + moved;
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300753}
754
Arnaldo Carvalho de Meloec80fde2011-05-26 09:53:51 -0300755static bool symbol__restricted_filename(const char *filename,
756 const char *restricted_filename)
757{
758 bool restricted = false;
759
760 if (symbol_conf.kptr_restrict) {
761 char *r = realpath(filename, NULL);
762
763 if (r != NULL) {
764 restricted = strcmp(r, restricted_filename) == 0;
765 free(r);
766 return restricted;
767 }
768 }
769
770 return restricted;
771}
772
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300773int dso__load_kallsyms(struct dso *dso, const char *filename,
Arnaldo Carvalho de Melo9de89fe2010-02-03 16:52:00 -0200774 struct map *map, symbol_filter_t filter)
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -0300775{
Arnaldo Carvalho de Meloec80fde2011-05-26 09:53:51 -0300776 if (symbol__restricted_filename(filename, "/proc/kallsyms"))
777 return -1;
778
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300779 if (dso__load_all_kallsyms(dso, filename, map) < 0)
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -0300780 return -1;
781
Anton Blanchard694bf402011-08-24 16:40:17 +1000782 symbols__fixup_duplicate(&dso->symbols[map->type]);
Anton Blanchard3f5a4272011-08-24 16:40:15 +1000783 symbols__fixup_end(&dso->symbols[map->type]);
784
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300785 if (dso->kernel == DSO_TYPE_GUEST_KERNEL)
786 dso->symtab_type = SYMTAB__GUEST_KALLSYMS;
Zhang, Yanmina1645ce2010-04-19 13:32:50 +0800787 else
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300788 dso->symtab_type = SYMTAB__KALLSYMS;
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -0300789
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300790 return dso__split_kallsyms(dso, map, filter);
Arnaldo Carvalho de Meloaf427bf2009-10-05 14:26:17 -0300791}
792
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300793static int dso__load_perf_map(struct dso *dso, struct map *map,
Arnaldo Carvalho de Melo6beba7a2009-10-21 17:34:06 -0200794 symbol_filter_t filter)
Pekka Enberg80d496b2009-06-08 21:12:48 +0300795{
796 char *line = NULL;
797 size_t n;
798 FILE *file;
799 int nr_syms = 0;
800
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300801 file = fopen(dso->long_name, "r");
Pekka Enberg80d496b2009-06-08 21:12:48 +0300802 if (file == NULL)
803 goto out_failure;
804
805 while (!feof(file)) {
Paul Mackerras9cffa8d2009-06-19 22:21:42 +1000806 u64 start, size;
Pekka Enberg80d496b2009-06-08 21:12:48 +0300807 struct symbol *sym;
808 int line_len, len;
809
810 line_len = getline(&line, &n, file);
811 if (line_len < 0)
812 break;
813
814 if (!line)
815 goto out_failure;
816
817 line[--line_len] = '\0'; /* \n */
818
819 len = hex2u64(line, &start);
820
821 len++;
822 if (len + 2 >= line_len)
823 continue;
824
825 len += hex2u64(line + len, &size);
826
827 len++;
828 if (len + 2 >= line_len)
829 continue;
830
Arnaldo Carvalho de Meloc408fed2010-08-05 12:59:47 -0300831 sym = symbol__new(start, size, STB_GLOBAL, line + len);
Pekka Enberg80d496b2009-06-08 21:12:48 +0300832
833 if (sym == NULL)
834 goto out_delete_line;
835
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -0300836 if (filter && filter(map, sym))
Arnaldo Carvalho de Melo00a192b2009-10-30 16:28:24 -0200837 symbol__delete(sym);
Pekka Enberg80d496b2009-06-08 21:12:48 +0300838 else {
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300839 symbols__insert(&dso->symbols[map->type], sym);
Pekka Enberg80d496b2009-06-08 21:12:48 +0300840 nr_syms++;
841 }
842 }
843
844 free(line);
845 fclose(file);
846
847 return nr_syms;
848
849out_delete_line:
850 free(line);
851out_failure:
852 return -1;
853}
854
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300855/**
856 * elf_symtab__for_each_symbol - iterate thru all the symbols
857 *
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300858 * @syms: struct elf_symtab instance to iterate
Ingo Molnar83a09442009-08-15 12:26:57 +0200859 * @idx: uint32_t idx
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300860 * @sym: GElf_Sym iterator
861 */
Ingo Molnar83a09442009-08-15 12:26:57 +0200862#define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \
863 for (idx = 0, gelf_getsym(syms, idx, &sym);\
864 idx < nr_syms; \
865 idx++, gelf_getsym(syms, idx, &sym))
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300866
867static inline uint8_t elf_sym__type(const GElf_Sym *sym)
868{
869 return GELF_ST_TYPE(sym->st_info);
870}
871
872static inline int elf_sym__is_function(const GElf_Sym *sym)
873{
874 return elf_sym__type(sym) == STT_FUNC &&
875 sym->st_name != 0 &&
Arnaldo Carvalho de Melo81833132009-10-05 23:35:03 -0300876 sym->st_shndx != SHN_UNDEF;
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300877}
878
Arnaldo Carvalho de Melof1dfa0b2009-12-11 14:50:39 -0200879static inline bool elf_sym__is_object(const GElf_Sym *sym)
880{
881 return elf_sym__type(sym) == STT_OBJECT &&
882 sym->st_name != 0 &&
883 sym->st_shndx != SHN_UNDEF;
884}
885
Mike Galbraith6cfcc532009-07-02 08:08:36 +0200886static inline int elf_sym__is_label(const GElf_Sym *sym)
887{
888 return elf_sym__type(sym) == STT_NOTYPE &&
889 sym->st_name != 0 &&
890 sym->st_shndx != SHN_UNDEF &&
891 sym->st_shndx != SHN_ABS;
892}
893
894static inline const char *elf_sec__name(const GElf_Shdr *shdr,
895 const Elf_Data *secstrs)
896{
897 return secstrs->d_buf + shdr->sh_name;
898}
899
900static inline int elf_sec__is_text(const GElf_Shdr *shdr,
901 const Elf_Data *secstrs)
902{
903 return strstr(elf_sec__name(shdr, secstrs), "text") != NULL;
904}
905
Arnaldo Carvalho de Melof1dfa0b2009-12-11 14:50:39 -0200906static inline bool elf_sec__is_data(const GElf_Shdr *shdr,
907 const Elf_Data *secstrs)
908{
909 return strstr(elf_sec__name(shdr, secstrs), "data") != NULL;
910}
911
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300912static inline const char *elf_sym__name(const GElf_Sym *sym,
913 const Elf_Data *symstrs)
914{
915 return symstrs->d_buf + sym->st_name;
916}
917
918static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
919 GElf_Shdr *shp, const char *name,
Ingo Molnar83a09442009-08-15 12:26:57 +0200920 size_t *idx)
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300921{
922 Elf_Scn *sec = NULL;
923 size_t cnt = 1;
924
925 while ((sec = elf_nextscn(elf, sec)) != NULL) {
926 char *str;
927
928 gelf_getshdr(sec, shp);
929 str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name);
930 if (!strcmp(name, str)) {
Ingo Molnar83a09442009-08-15 12:26:57 +0200931 if (idx)
932 *idx = cnt;
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -0300933 break;
934 }
935 ++cnt;
936 }
937
938 return sec;
939}
940
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -0300941#define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \
942 for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \
943 idx < nr_entries; \
944 ++idx, pos = gelf_getrel(reldata, idx, &pos_mem))
945
946#define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \
947 for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \
948 idx < nr_entries; \
949 ++idx, pos = gelf_getrela(reldata, idx, &pos_mem))
950
Arnaldo Carvalho de Meloa25e46c2009-07-11 12:18:36 -0300951/*
952 * We need to check if we have a .dynsym, so that we can handle the
953 * .plt, synthesizing its symbols, that aren't on the symtabs (be it
954 * .dynsym or .symtab).
955 * And always look at the original dso, not at debuginfo packages, that
956 * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS).
957 */
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300958static int dso__synthesize_plt_symbols(struct dso *dso, struct map *map,
Arnaldo Carvalho de Melo82164162009-11-16 13:48:11 -0200959 symbol_filter_t filter)
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -0300960{
961 uint32_t nr_rel_entries, idx;
962 GElf_Sym sym;
Paul Mackerras9cffa8d2009-06-19 22:21:42 +1000963 u64 plt_offset;
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -0300964 GElf_Shdr shdr_plt;
965 struct symbol *f;
Arnaldo Carvalho de Meloa25e46c2009-07-11 12:18:36 -0300966 GElf_Shdr shdr_rel_plt, shdr_dynsym;
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -0300967 Elf_Data *reldata, *syms, *symstrs;
Arnaldo Carvalho de Meloa25e46c2009-07-11 12:18:36 -0300968 Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym;
969 size_t dynsym_idx;
970 GElf_Ehdr ehdr;
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -0300971 char sympltname[1024];
Arnaldo Carvalho de Meloa25e46c2009-07-11 12:18:36 -0300972 Elf *elf;
973 int nr = 0, symidx, fd, err = 0;
David Ahernec5761e2010-12-09 13:27:07 -0700974 char name[PATH_MAX];
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -0300975
David Ahernec5761e2010-12-09 13:27:07 -0700976 snprintf(name, sizeof(name), "%s%s",
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -0300977 symbol_conf.symfs, dso->long_name);
David Ahernec5761e2010-12-09 13:27:07 -0700978 fd = open(name, O_RDONLY);
Arnaldo Carvalho de Meloa25e46c2009-07-11 12:18:36 -0300979 if (fd < 0)
980 goto out;
981
Marti Raudsepp84087122009-10-24 19:10:36 +0300982 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
Arnaldo Carvalho de Meloa25e46c2009-07-11 12:18:36 -0300983 if (elf == NULL)
984 goto out_close;
985
986 if (gelf_getehdr(elf, &ehdr) == NULL)
987 goto out_elf_end;
988
989 scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym,
990 ".dynsym", &dynsym_idx);
991 if (scn_dynsym == NULL)
992 goto out_elf_end;
993
994 scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -0300995 ".rela.plt", NULL);
996 if (scn_plt_rel == NULL) {
Arnaldo Carvalho de Meloa25e46c2009-07-11 12:18:36 -0300997 scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -0300998 ".rel.plt", NULL);
999 if (scn_plt_rel == NULL)
Arnaldo Carvalho de Meloa25e46c2009-07-11 12:18:36 -03001000 goto out_elf_end;
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -03001001 }
1002
Arnaldo Carvalho de Meloa25e46c2009-07-11 12:18:36 -03001003 err = -1;
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -03001004
Arnaldo Carvalho de Meloa25e46c2009-07-11 12:18:36 -03001005 if (shdr_rel_plt.sh_link != dynsym_idx)
1006 goto out_elf_end;
1007
1008 if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL)
1009 goto out_elf_end;
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -03001010
1011 /*
Ingo Molnar83a09442009-08-15 12:26:57 +02001012 * Fetch the relocation section to find the idxes to the GOT
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -03001013 * and the symbols in the .dynsym they refer to.
1014 */
1015 reldata = elf_getdata(scn_plt_rel, NULL);
1016 if (reldata == NULL)
Arnaldo Carvalho de Meloa25e46c2009-07-11 12:18:36 -03001017 goto out_elf_end;
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -03001018
1019 syms = elf_getdata(scn_dynsym, NULL);
1020 if (syms == NULL)
Arnaldo Carvalho de Meloa25e46c2009-07-11 12:18:36 -03001021 goto out_elf_end;
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -03001022
Arnaldo Carvalho de Meloa25e46c2009-07-11 12:18:36 -03001023 scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link);
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -03001024 if (scn_symstrs == NULL)
Arnaldo Carvalho de Meloa25e46c2009-07-11 12:18:36 -03001025 goto out_elf_end;
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -03001026
1027 symstrs = elf_getdata(scn_symstrs, NULL);
1028 if (symstrs == NULL)
Arnaldo Carvalho de Meloa25e46c2009-07-11 12:18:36 -03001029 goto out_elf_end;
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -03001030
1031 nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize;
1032 plt_offset = shdr_plt.sh_offset;
1033
1034 if (shdr_rel_plt.sh_type == SHT_RELA) {
1035 GElf_Rela pos_mem, *pos;
1036
1037 elf_section__for_each_rela(reldata, pos, pos_mem, idx,
1038 nr_rel_entries) {
1039 symidx = GELF_R_SYM(pos->r_info);
1040 plt_offset += shdr_plt.sh_entsize;
1041 gelf_getsym(syms, symidx, &sym);
1042 snprintf(sympltname, sizeof(sympltname),
1043 "%s@plt", elf_sym__name(&sym, symstrs));
1044
1045 f = symbol__new(plt_offset, shdr_plt.sh_entsize,
Arnaldo Carvalho de Meloc408fed2010-08-05 12:59:47 -03001046 STB_GLOBAL, sympltname);
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -03001047 if (!f)
Arnaldo Carvalho de Meloa25e46c2009-07-11 12:18:36 -03001048 goto out_elf_end;
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -03001049
Arnaldo Carvalho de Melo82164162009-11-16 13:48:11 -02001050 if (filter && filter(map, f))
1051 symbol__delete(f);
1052 else {
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001053 symbols__insert(&dso->symbols[map->type], f);
Arnaldo Carvalho de Melo82164162009-11-16 13:48:11 -02001054 ++nr;
1055 }
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -03001056 }
1057 } else if (shdr_rel_plt.sh_type == SHT_REL) {
1058 GElf_Rel pos_mem, *pos;
1059 elf_section__for_each_rel(reldata, pos, pos_mem, idx,
1060 nr_rel_entries) {
1061 symidx = GELF_R_SYM(pos->r_info);
1062 plt_offset += shdr_plt.sh_entsize;
1063 gelf_getsym(syms, symidx, &sym);
1064 snprintf(sympltname, sizeof(sympltname),
1065 "%s@plt", elf_sym__name(&sym, symstrs));
1066
1067 f = symbol__new(plt_offset, shdr_plt.sh_entsize,
Arnaldo Carvalho de Meloc408fed2010-08-05 12:59:47 -03001068 STB_GLOBAL, sympltname);
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -03001069 if (!f)
Arnaldo Carvalho de Meloa25e46c2009-07-11 12:18:36 -03001070 goto out_elf_end;
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -03001071
Arnaldo Carvalho de Melo82164162009-11-16 13:48:11 -02001072 if (filter && filter(map, f))
1073 symbol__delete(f);
1074 else {
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001075 symbols__insert(&dso->symbols[map->type], f);
Arnaldo Carvalho de Melo82164162009-11-16 13:48:11 -02001076 ++nr;
1077 }
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -03001078 }
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -03001079 }
1080
Arnaldo Carvalho de Meloa25e46c2009-07-11 12:18:36 -03001081 err = 0;
1082out_elf_end:
1083 elf_end(elf);
1084out_close:
1085 close(fd);
1086
1087 if (err == 0)
1088 return nr;
1089out:
Arnaldo Carvalho de Melofe2197b2010-03-11 20:12:40 -03001090 pr_debug("%s: problems reading %s PLT info.\n",
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001091 __func__, dso->long_name);
Arnaldo Carvalho de Meloa25e46c2009-07-11 12:18:36 -03001092 return 0;
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -03001093}
1094
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001095static bool elf_sym__is_a(GElf_Sym *sym, enum map_type type)
Arnaldo Carvalho de Melod45868d2009-12-11 14:50:38 -02001096{
1097 switch (type) {
1098 case MAP__FUNCTION:
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001099 return elf_sym__is_function(sym);
Arnaldo Carvalho de Melof1dfa0b2009-12-11 14:50:39 -02001100 case MAP__VARIABLE:
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001101 return elf_sym__is_object(sym);
Arnaldo Carvalho de Melod45868d2009-12-11 14:50:38 -02001102 default:
1103 return false;
1104 }
1105}
1106
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001107static bool elf_sec__is_a(GElf_Shdr *shdr, Elf_Data *secstrs,
1108 enum map_type type)
Arnaldo Carvalho de Melod45868d2009-12-11 14:50:38 -02001109{
1110 switch (type) {
1111 case MAP__FUNCTION:
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001112 return elf_sec__is_text(shdr, secstrs);
Arnaldo Carvalho de Melof1dfa0b2009-12-11 14:50:39 -02001113 case MAP__VARIABLE:
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001114 return elf_sec__is_data(shdr, secstrs);
Arnaldo Carvalho de Melod45868d2009-12-11 14:50:38 -02001115 default:
1116 return false;
1117 }
1118}
1119
Eric B Munson70c38562010-06-14 14:56:33 +01001120static size_t elf_addr_to_index(Elf *elf, GElf_Addr addr)
1121{
1122 Elf_Scn *sec = NULL;
1123 GElf_Shdr shdr;
1124 size_t cnt = 1;
1125
1126 while ((sec = elf_nextscn(elf, sec)) != NULL) {
1127 gelf_getshdr(sec, &shdr);
1128
1129 if ((addr >= shdr.sh_addr) &&
1130 (addr < (shdr.sh_addr + shdr.sh_size)))
1131 return cnt;
1132
1133 ++cnt;
1134 }
1135
1136 return -1;
1137}
1138
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001139static int dso__load_sym(struct dso *dso, struct map *map, const char *name,
Dave Martin6da80ce2010-07-30 09:50:09 -03001140 int fd, symbol_filter_t filter, int kmodule,
1141 int want_symtab)
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001142{
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001143 struct kmap *kmap = dso->kernel ? map__kmap(map) : NULL;
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -03001144 struct map *curr_map = map;
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001145 struct dso *curr_dso = dso;
Mike Galbraith6cfcc532009-07-02 08:08:36 +02001146 Elf_Data *symstrs, *secstrs;
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001147 uint32_t nr_syms;
1148 int err = -1;
Ingo Molnar83a09442009-08-15 12:26:57 +02001149 uint32_t idx;
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001150 GElf_Ehdr ehdr;
Eric B Munson70c38562010-06-14 14:56:33 +01001151 GElf_Shdr shdr, opdshdr;
1152 Elf_Data *syms, *opddata = NULL;
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001153 GElf_Sym sym;
Eric B Munson70c38562010-06-14 14:56:33 +01001154 Elf_Scn *sec, *sec_strndx, *opdsec;
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001155 Elf *elf;
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001156 int nr = 0;
Eric B Munson70c38562010-06-14 14:56:33 +01001157 size_t opdidx = 0;
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001158
Marti Raudsepp84087122009-10-24 19:10:36 +03001159 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001160 if (elf == NULL) {
Dave Martin8b1389e2010-07-30 09:36:08 -03001161 pr_debug("%s: cannot read %s ELF file.\n", __func__, name);
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001162 goto out_close;
1163 }
1164
1165 if (gelf_getehdr(elf, &ehdr) == NULL) {
Dave Martin8b1389e2010-07-30 09:36:08 -03001166 pr_debug("%s: cannot get elf header.\n", __func__);
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001167 goto out_elf_end;
1168 }
1169
Dave Martin6da80ce2010-07-30 09:50:09 -03001170 /* Always reject images with a mismatched build-id: */
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001171 if (dso->has_build_id) {
Dave Martin21916c32010-07-30 09:08:08 -03001172 u8 build_id[BUILD_ID_SIZE];
1173
Stephane Eranianbe96ea82010-10-22 17:25:01 +02001174 if (elf_read_build_id(elf, build_id, BUILD_ID_SIZE) < 0)
Dave Martin21916c32010-07-30 09:08:08 -03001175 goto out_elf_end;
1176
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001177 if (!dso__build_id_equal(dso, build_id))
Dave Martin21916c32010-07-30 09:08:08 -03001178 goto out_elf_end;
1179 }
1180
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -03001181 sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL);
1182 if (sec == NULL) {
Dave Martin6da80ce2010-07-30 09:50:09 -03001183 if (want_symtab)
1184 goto out_elf_end;
1185
Arnaldo Carvalho de Meloa25e46c2009-07-11 12:18:36 -03001186 sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL);
1187 if (sec == NULL)
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -03001188 goto out_elf_end;
Arnaldo Carvalho de Melo8ce998d2009-06-03 00:54:33 -03001189 }
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001190
Eric B Munson70c38562010-06-14 14:56:33 +01001191 opdsec = elf_section_by_name(elf, &ehdr, &opdshdr, ".opd", &opdidx);
Anton Blanchardadb09182011-08-24 16:40:14 +10001192 if (opdshdr.sh_type != SHT_PROGBITS)
1193 opdsec = NULL;
Eric B Munson70c38562010-06-14 14:56:33 +01001194 if (opdsec)
1195 opddata = elf_rawdata(opdsec, NULL);
1196
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001197 syms = elf_getdata(sec, NULL);
1198 if (syms == NULL)
1199 goto out_elf_end;
1200
1201 sec = elf_getscn(elf, shdr.sh_link);
1202 if (sec == NULL)
1203 goto out_elf_end;
1204
1205 symstrs = elf_getdata(sec, NULL);
1206 if (symstrs == NULL)
1207 goto out_elf_end;
1208
Mike Galbraith6cfcc532009-07-02 08:08:36 +02001209 sec_strndx = elf_getscn(elf, ehdr.e_shstrndx);
1210 if (sec_strndx == NULL)
1211 goto out_elf_end;
1212
1213 secstrs = elf_getdata(sec_strndx, NULL);
Stoyan Gaydarov9b30a262009-07-30 05:25:29 -05001214 if (secstrs == NULL)
Mike Galbraith6cfcc532009-07-02 08:08:36 +02001215 goto out_elf_end;
1216
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001217 nr_syms = shdr.sh_size / shdr.sh_entsize;
1218
Arjan van de Vene9fbc9d2009-06-06 21:22:33 +02001219 memset(&sym, 0, sizeof(sym));
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001220 if (dso->kernel == DSO_TYPE_USER) {
1221 dso->adjust_symbols = (ehdr.e_type == ET_EXEC ||
Arnaldo Carvalho de Melo30d7a772009-07-02 21:24:14 -03001222 elf_section_by_name(elf, &ehdr, &shdr,
1223 ".gnu.prelink_undo",
1224 NULL) != NULL);
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001225 } else {
1226 dso->adjust_symbols = 0;
1227 }
Ingo Molnar83a09442009-08-15 12:26:57 +02001228 elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) {
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001229 struct symbol *f;
Arnaldo Carvalho de Melo56b03f32010-01-05 16:50:31 -02001230 const char *elf_name = elf_sym__name(&sym, symstrs);
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -03001231 char *demangled = NULL;
Mike Galbraith6cfcc532009-07-02 08:08:36 +02001232 int is_label = elf_sym__is_label(&sym);
1233 const char *section_name;
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001234
Arnaldo Carvalho de Melo9de89fe2010-02-03 16:52:00 -02001235 if (kmap && kmap->ref_reloc_sym && kmap->ref_reloc_sym->name &&
1236 strcmp(elf_name, kmap->ref_reloc_sym->name) == 0)
1237 kmap->ref_reloc_sym->unrelocated_addr = sym.st_value;
Arnaldo Carvalho de Melo56b03f32010-01-05 16:50:31 -02001238
Arnaldo Carvalho de Melod45868d2009-12-11 14:50:38 -02001239 if (!is_label && !elf_sym__is_a(&sym, map->type))
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001240 continue;
1241
Dave Martin696b97a2010-08-09 12:21:18 +01001242 /* Reject ARM ELF "mapping symbols": these aren't unique and
1243 * don't identify functions, so will confuse the profile
1244 * output: */
1245 if (ehdr.e_machine == EM_ARM) {
1246 if (!strcmp(elf_name, "$a") ||
1247 !strcmp(elf_name, "$d") ||
1248 !strcmp(elf_name, "$t"))
1249 continue;
1250 }
1251
Eric B Munson70c38562010-06-14 14:56:33 +01001252 if (opdsec && sym.st_shndx == opdidx) {
1253 u32 offset = sym.st_value - opdshdr.sh_addr;
1254 u64 *opd = opddata->d_buf + offset;
1255 sym.st_value = *opd;
1256 sym.st_shndx = elf_addr_to_index(elf, sym.st_value);
1257 }
1258
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001259 sec = elf_getscn(elf, sym.st_shndx);
1260 if (!sec)
1261 goto out_elf_end;
1262
1263 gelf_getshdr(sec, &shdr);
Mike Galbraith6cfcc532009-07-02 08:08:36 +02001264
Arnaldo Carvalho de Melod45868d2009-12-11 14:50:38 -02001265 if (is_label && !elf_sec__is_a(&shdr, secstrs, map->type))
Mike Galbraith6cfcc532009-07-02 08:08:36 +02001266 continue;
1267
1268 section_name = elf_sec__name(&shdr, secstrs);
Ingo Molnar0b73da32009-06-06 15:48:52 +02001269
Dr. David Alan Gilbertb2f8fb22011-01-21 16:40:19 +00001270 /* On ARM, symbols for thumb functions have 1 added to
1271 * the symbol address as a flag - remove it */
1272 if ((ehdr.e_machine == EM_ARM) &&
1273 (map->type == MAP__FUNCTION) &&
1274 (sym.st_value & 1))
1275 --sym.st_value;
1276
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001277 if (dso->kernel != DSO_TYPE_USER || kmodule) {
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -03001278 char dso_name[PATH_MAX];
1279
1280 if (strcmp(section_name,
Arnaldo Carvalho de Melob63be8d2010-03-15 15:03:50 -03001281 (curr_dso->short_name +
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001282 dso->short_name_len)) == 0)
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -03001283 goto new_symbol;
1284
1285 if (strcmp(section_name, ".text") == 0) {
1286 curr_map = map;
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001287 curr_dso = dso;
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -03001288 goto new_symbol;
1289 }
1290
1291 snprintf(dso_name, sizeof(dso_name),
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001292 "%s%s", dso->short_name, section_name);
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -03001293
Arnaldo Carvalho de Melo9de89fe2010-02-03 16:52:00 -02001294 curr_map = map_groups__find_by_name(kmap->kmaps, map->type, dso_name);
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -03001295 if (curr_map == NULL) {
1296 u64 start = sym.st_value;
1297
1298 if (kmodule)
1299 start += map->start + shdr.sh_offset;
1300
Arnaldo Carvalho de Melo00a192b2009-10-30 16:28:24 -02001301 curr_dso = dso__new(dso_name);
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -03001302 if (curr_dso == NULL)
1303 goto out_elf_end;
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001304 curr_dso->kernel = dso->kernel;
1305 curr_dso->long_name = dso->long_name;
1306 curr_dso->long_name_len = dso->long_name_len;
Arnaldo Carvalho de Melo36105832009-11-27 16:29:16 -02001307 curr_map = map__new2(start, curr_dso,
Arnaldo Carvalho de Melo6275ce22010-02-03 16:52:01 -02001308 map->type);
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -03001309 if (curr_map == NULL) {
1310 dso__delete(curr_dso);
1311 goto out_elf_end;
1312 }
Arnaldo Carvalho de Meloed52ce22009-10-19 17:17:57 -02001313 curr_map->map_ip = identity__map_ip;
1314 curr_map->unmap_ip = identity__map_ip;
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001315 curr_dso->symtab_type = dso->symtab_type;
Arnaldo Carvalho de Melo9de89fe2010-02-03 16:52:00 -02001316 map_groups__insert(kmap->kmaps, curr_map);
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001317 dsos__add(&dso->node, curr_dso);
Arnaldo Carvalho de Melo6275ce22010-02-03 16:52:01 -02001318 dso__set_loaded(curr_dso, map->type);
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -03001319 } else
1320 curr_dso = curr_map->dso;
1321
1322 goto new_symbol;
Arnaldo Carvalho de Meloaf427bf2009-10-05 14:26:17 -03001323 }
1324
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -03001325 if (curr_dso->adjust_symbols) {
Arnaldo Carvalho de Melo9486aa32011-01-22 20:37:02 -02001326 pr_debug4("%s: adjusting symbol: st_value: %#" PRIx64 " "
1327 "sh_addr: %#" PRIx64 " sh_offset: %#" PRIx64 "\n", __func__,
Arnaldo Carvalho de Melo29a9f662010-02-03 16:52:06 -02001328 (u64)sym.st_value, (u64)shdr.sh_addr,
1329 (u64)shdr.sh_offset);
Arnaldo Carvalho de Melof5812a72009-06-30 11:43:17 -03001330 sym.st_value -= shdr.sh_addr - shdr.sh_offset;
Arnaldo Carvalho de Meloaf427bf2009-10-05 14:26:17 -03001331 }
Arnaldo Carvalho de Melo28ac9092009-07-20 14:14:12 -03001332 /*
1333 * We need to figure out if the object was created from C++ sources
1334 * DWARF DW_compile_unit has this, but we don't always have access
1335 * to it...
1336 */
Ingo Molnar83a09442009-08-15 12:26:57 +02001337 demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI);
Arnaldo Carvalho de Melo28ac9092009-07-20 14:14:12 -03001338 if (demangled != NULL)
Ingo Molnar83a09442009-08-15 12:26:57 +02001339 elf_name = demangled;
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -03001340new_symbol:
Arnaldo Carvalho de Meloc408fed2010-08-05 12:59:47 -03001341 f = symbol__new(sym.st_value, sym.st_size,
1342 GELF_ST_BIND(sym.st_info), elf_name);
Arnaldo Carvalho de Melo28ac9092009-07-20 14:14:12 -03001343 free(demangled);
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001344 if (!f)
1345 goto out_elf_end;
1346
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -03001347 if (filter && filter(curr_map, f))
Arnaldo Carvalho de Melo00a192b2009-10-30 16:28:24 -02001348 symbol__delete(f);
Arnaldo Carvalho de Melo69ee69f2009-05-28 14:55:26 -03001349 else {
Arnaldo Carvalho de Melo6a4694a2009-11-27 16:29:17 -02001350 symbols__insert(&curr_dso->symbols[curr_map->type], f);
Arnaldo Carvalho de Melo69ee69f2009-05-28 14:55:26 -03001351 nr++;
1352 }
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001353 }
1354
Arnaldo Carvalho de Melo2e538c42009-10-07 13:48:56 -03001355 /*
1356 * For misannotated, zeroed, ASM function sizes.
1357 */
Arnaldo Carvalho de Melo6275ce22010-02-03 16:52:01 -02001358 if (nr > 0) {
Anton Blanchard694bf402011-08-24 16:40:17 +10001359 symbols__fixup_duplicate(&dso->symbols[map->type]);
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001360 symbols__fixup_end(&dso->symbols[map->type]);
Arnaldo Carvalho de Melo6275ce22010-02-03 16:52:01 -02001361 if (kmap) {
1362 /*
1363 * We need to fixup this here too because we create new
1364 * maps here, for things like vsyscall sections.
1365 */
1366 __map_groups__fixup_end(kmap->kmaps, map->type);
1367 }
1368 }
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001369 err = nr;
1370out_elf_end:
1371 elf_end(elf);
1372out_close:
1373 return err;
1374}
1375
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001376static bool dso__build_id_equal(const struct dso *dso, u8 *build_id)
Arnaldo Carvalho de Melo78075ca2009-11-20 20:51:26 -02001377{
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001378 return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0;
Arnaldo Carvalho de Melo78075ca2009-11-20 20:51:26 -02001379}
1380
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08001381bool __dsos__read_build_ids(struct list_head *head, bool with_hits)
Frederic Weisbecker57f395a2009-11-11 04:51:04 +01001382{
Arnaldo Carvalho de Meloe30a3d12009-11-18 20:20:51 -02001383 bool have_build_id = false;
Frederic Weisbecker57f395a2009-11-11 04:51:04 +01001384 struct dso *pos;
1385
Arnaldo Carvalho de Melo6122e4e2010-02-03 16:52:05 -02001386 list_for_each_entry(pos, head, node) {
1387 if (with_hits && !pos->hit)
1388 continue;
Arnaldo Carvalho de Melof6e14672010-05-19 11:13:02 -03001389 if (pos->has_build_id) {
1390 have_build_id = true;
1391 continue;
1392 }
Arnaldo Carvalho de Meloe30a3d12009-11-18 20:20:51 -02001393 if (filename__read_build_id(pos->long_name, pos->build_id,
1394 sizeof(pos->build_id)) > 0) {
1395 have_build_id = true;
1396 pos->has_build_id = true;
1397 }
Arnaldo Carvalho de Melo6122e4e2010-02-03 16:52:05 -02001398 }
Frederic Weisbecker57f395a2009-11-11 04:51:04 +01001399
Arnaldo Carvalho de Meloe30a3d12009-11-18 20:20:51 -02001400 return have_build_id;
Frederic Weisbecker57f395a2009-11-11 04:51:04 +01001401}
1402
Arnaldo Carvalho de Melofd7a3462009-11-20 20:51:25 -02001403/*
1404 * Align offset to 4 bytes as needed for note name and descriptor data.
1405 */
1406#define NOTE_ALIGN(n) (((n) + 3) & -4U)
1407
Dave Martin21916c32010-07-30 09:08:08 -03001408static int elf_read_build_id(Elf *elf, void *bf, size_t size)
Arnaldo Carvalho de Melo4d1e00a2009-08-05 19:02:49 -03001409{
Dave Martin21916c32010-07-30 09:08:08 -03001410 int err = -1;
Arnaldo Carvalho de Melo4d1e00a2009-08-05 19:02:49 -03001411 GElf_Ehdr ehdr;
1412 GElf_Shdr shdr;
Arnaldo Carvalho de Melofd7a3462009-11-20 20:51:25 -02001413 Elf_Data *data;
Arnaldo Carvalho de Melo4d1e00a2009-08-05 19:02:49 -03001414 Elf_Scn *sec;
Pekka Enberge57cfcd2009-11-22 12:29:44 +02001415 Elf_Kind ek;
Arnaldo Carvalho de Melofd7a3462009-11-20 20:51:25 -02001416 void *ptr;
Arnaldo Carvalho de Melo4d1e00a2009-08-05 19:02:49 -03001417
Arnaldo Carvalho de Melo2643ce12009-11-03 21:46:10 -02001418 if (size < BUILD_ID_SIZE)
1419 goto out;
1420
Pekka Enberge57cfcd2009-11-22 12:29:44 +02001421 ek = elf_kind(elf);
1422 if (ek != ELF_K_ELF)
Dave Martin21916c32010-07-30 09:08:08 -03001423 goto out;
Pekka Enberge57cfcd2009-11-22 12:29:44 +02001424
Arnaldo Carvalho de Melo4d1e00a2009-08-05 19:02:49 -03001425 if (gelf_getehdr(elf, &ehdr) == NULL) {
Arnaldo Carvalho de Melo6beba7a2009-10-21 17:34:06 -02001426 pr_err("%s: cannot get elf header.\n", __func__);
Dave Martin21916c32010-07-30 09:08:08 -03001427 goto out;
Arnaldo Carvalho de Melo4d1e00a2009-08-05 19:02:49 -03001428 }
1429
Arnaldo Carvalho de Melo2643ce12009-11-03 21:46:10 -02001430 sec = elf_section_by_name(elf, &ehdr, &shdr,
1431 ".note.gnu.build-id", NULL);
Arnaldo Carvalho de Melofd7a3462009-11-20 20:51:25 -02001432 if (sec == NULL) {
1433 sec = elf_section_by_name(elf, &ehdr, &shdr,
1434 ".notes", NULL);
1435 if (sec == NULL)
Dave Martin21916c32010-07-30 09:08:08 -03001436 goto out;
Arnaldo Carvalho de Melofd7a3462009-11-20 20:51:25 -02001437 }
1438
1439 data = elf_getdata(sec, NULL);
1440 if (data == NULL)
Dave Martin21916c32010-07-30 09:08:08 -03001441 goto out;
Arnaldo Carvalho de Melo4d1e00a2009-08-05 19:02:49 -03001442
Arnaldo Carvalho de Melofd7a3462009-11-20 20:51:25 -02001443 ptr = data->d_buf;
1444 while (ptr < (data->d_buf + data->d_size)) {
1445 GElf_Nhdr *nhdr = ptr;
Stephane Eranianbe96ea82010-10-22 17:25:01 +02001446 size_t namesz = NOTE_ALIGN(nhdr->n_namesz),
1447 descsz = NOTE_ALIGN(nhdr->n_descsz);
Arnaldo Carvalho de Melofd7a3462009-11-20 20:51:25 -02001448 const char *name;
1449
1450 ptr += sizeof(*nhdr);
1451 name = ptr;
1452 ptr += namesz;
1453 if (nhdr->n_type == NT_GNU_BUILD_ID &&
1454 nhdr->n_namesz == sizeof("GNU")) {
1455 if (memcmp(name, "GNU", sizeof("GNU")) == 0) {
Stephane Eranianbe96ea82010-10-22 17:25:01 +02001456 size_t sz = min(size, descsz);
1457 memcpy(bf, ptr, sz);
1458 memset(bf + sz, 0, size - sz);
1459 err = descsz;
Arnaldo Carvalho de Melofd7a3462009-11-20 20:51:25 -02001460 break;
1461 }
1462 }
1463 ptr += descsz;
1464 }
Dave Martin21916c32010-07-30 09:08:08 -03001465
1466out:
1467 return err;
1468}
1469
1470int filename__read_build_id(const char *filename, void *bf, size_t size)
1471{
1472 int fd, err = -1;
1473 Elf *elf;
1474
1475 if (size < BUILD_ID_SIZE)
1476 goto out;
1477
1478 fd = open(filename, O_RDONLY);
1479 if (fd < 0)
1480 goto out;
1481
1482 elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
1483 if (elf == NULL) {
1484 pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename);
1485 goto out_close;
1486 }
1487
1488 err = elf_read_build_id(elf, bf, size);
1489
Arnaldo Carvalho de Melo2643ce12009-11-03 21:46:10 -02001490 elf_end(elf);
1491out_close:
1492 close(fd);
1493out:
1494 return err;
1495}
1496
Arnaldo Carvalho de Melof1617b42009-11-18 20:20:52 -02001497int sysfs__read_build_id(const char *filename, void *build_id, size_t size)
1498{
1499 int fd, err = -1;
1500
1501 if (size < BUILD_ID_SIZE)
1502 goto out;
1503
1504 fd = open(filename, O_RDONLY);
1505 if (fd < 0)
1506 goto out;
1507
1508 while (1) {
1509 char bf[BUFSIZ];
1510 GElf_Nhdr nhdr;
Stephane Eranianbe96ea82010-10-22 17:25:01 +02001511 size_t namesz, descsz;
Arnaldo Carvalho de Melof1617b42009-11-18 20:20:52 -02001512
1513 if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr))
1514 break;
1515
Arnaldo Carvalho de Melofd7a3462009-11-20 20:51:25 -02001516 namesz = NOTE_ALIGN(nhdr.n_namesz);
1517 descsz = NOTE_ALIGN(nhdr.n_descsz);
Arnaldo Carvalho de Melof1617b42009-11-18 20:20:52 -02001518 if (nhdr.n_type == NT_GNU_BUILD_ID &&
1519 nhdr.n_namesz == sizeof("GNU")) {
Stephane Eranianbe96ea82010-10-22 17:25:01 +02001520 if (read(fd, bf, namesz) != (ssize_t)namesz)
Arnaldo Carvalho de Melof1617b42009-11-18 20:20:52 -02001521 break;
1522 if (memcmp(bf, "GNU", sizeof("GNU")) == 0) {
Stephane Eranianbe96ea82010-10-22 17:25:01 +02001523 size_t sz = min(descsz, size);
1524 if (read(fd, build_id, sz) == (ssize_t)sz) {
1525 memset(build_id + sz, 0, size - sz);
Arnaldo Carvalho de Melof1617b42009-11-18 20:20:52 -02001526 err = 0;
1527 break;
1528 }
Stephane Eranianbe96ea82010-10-22 17:25:01 +02001529 } else if (read(fd, bf, descsz) != (ssize_t)descsz)
Arnaldo Carvalho de Melof1617b42009-11-18 20:20:52 -02001530 break;
1531 } else {
1532 int n = namesz + descsz;
1533 if (read(fd, bf, n) != n)
1534 break;
1535 }
1536 }
1537 close(fd);
1538out:
1539 return err;
1540}
1541
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001542char dso__symtab_origin(const struct dso *dso)
Arnaldo Carvalho de Melo94cb9e32009-08-06 14:43:17 -03001543{
1544 static const char origin[] = {
Arnaldo Carvalho de Melo878b4392011-03-11 13:13:36 -03001545 [SYMTAB__KALLSYMS] = 'k',
1546 [SYMTAB__JAVA_JIT] = 'j',
1547 [SYMTAB__BUILD_ID_CACHE] = 'B',
1548 [SYMTAB__FEDORA_DEBUGINFO] = 'f',
1549 [SYMTAB__UBUNTU_DEBUGINFO] = 'u',
1550 [SYMTAB__BUILDID_DEBUGINFO] = 'b',
1551 [SYMTAB__SYSTEM_PATH_DSO] = 'd',
1552 [SYMTAB__SYSTEM_PATH_KMODULE] = 'K',
1553 [SYMTAB__GUEST_KALLSYMS] = 'g',
1554 [SYMTAB__GUEST_KMODULE] = 'G',
Arnaldo Carvalho de Melo94cb9e32009-08-06 14:43:17 -03001555 };
1556
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001557 if (dso == NULL || dso->symtab_type == SYMTAB__NOT_FOUND)
Arnaldo Carvalho de Melo94cb9e32009-08-06 14:43:17 -03001558 return '!';
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001559 return origin[dso->symtab_type];
Arnaldo Carvalho de Melo94cb9e32009-08-06 14:43:17 -03001560}
1561
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001562int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter)
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001563{
Arnaldo Carvalho de Melo4d1e00a2009-08-05 19:02:49 -03001564 int size = PATH_MAX;
Arnaldo Carvalho de Meloc338aee2009-11-20 20:51:27 -02001565 char *name;
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001566 int ret = -1;
1567 int fd;
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -03001568 struct machine *machine;
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08001569 const char *root_dir;
Dave Martin6da80ce2010-07-30 09:50:09 -03001570 int want_symtab;
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001571
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001572 dso__set_loaded(dso, map->type);
Arnaldo Carvalho de Melo66bd8422009-10-28 21:51:21 -02001573
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001574 if (dso->kernel == DSO_TYPE_KERNEL)
1575 return dso__load_kernel_sym(dso, map, filter);
1576 else if (dso->kernel == DSO_TYPE_GUEST_KERNEL)
1577 return dso__load_guest_kernel_sym(dso, map, filter);
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08001578
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -03001579 if (map->groups && map->groups->machine)
1580 machine = map->groups->machine;
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08001581 else
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -03001582 machine = NULL;
Arnaldo Carvalho de Meloc338aee2009-11-20 20:51:27 -02001583
1584 name = malloc(size);
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001585 if (!name)
1586 return -1;
1587
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001588 dso->adjust_symbols = 0;
Arnaldo Carvalho de Melof5812a72009-06-30 11:43:17 -03001589
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001590 if (strncmp(dso->name, "/tmp/perf-", 10) == 0) {
Pekka Enberg981c1252011-08-09 22:54:18 +03001591 struct stat st;
1592
Vasiliy Kulikove9b52ef2011-08-12 00:55:37 +04001593 if (lstat(dso->name, &st) < 0)
Pekka Enberg981c1252011-08-09 22:54:18 +03001594 return -1;
1595
1596 if (st.st_uid && (st.st_uid != geteuid())) {
1597 pr_warning("File %s not owned by current user or root, "
1598 "ignoring it.\n", dso->name);
1599 return -1;
1600 }
1601
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001602 ret = dso__load_perf_map(dso, map, filter);
1603 dso->symtab_type = ret > 0 ? SYMTAB__JAVA_JIT :
Arnaldo Carvalho de Melo878b4392011-03-11 13:13:36 -03001604 SYMTAB__NOT_FOUND;
Arnaldo Carvalho de Melo94cb9e32009-08-06 14:43:17 -03001605 return ret;
1606 }
1607
Dave Martin6da80ce2010-07-30 09:50:09 -03001608 /* Iterate over candidate debug images.
1609 * On the first pass, only load images if they have a full symtab.
1610 * Failing that, do a second pass where we accept .dynsym also
1611 */
Arnaldo Carvalho de Melo60e4b102011-03-22 15:42:14 -03001612 want_symtab = 1;
1613restart:
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001614 for (dso->symtab_type = SYMTAB__BUILD_ID_CACHE;
1615 dso->symtab_type != SYMTAB__NOT_FOUND;
1616 dso->symtab_type++) {
1617 switch (dso->symtab_type) {
Arnaldo Carvalho de Melo878b4392011-03-11 13:13:36 -03001618 case SYMTAB__BUILD_ID_CACHE:
David Ahernec5761e2010-12-09 13:27:07 -07001619 /* skip the locally configured cache if a symfs is given */
1620 if (symbol_conf.symfs[0] ||
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001621 (dso__build_id_filename(dso, name, size) == NULL)) {
Dave Martin6da80ce2010-07-30 09:50:09 -03001622 continue;
David Ahernec5761e2010-12-09 13:27:07 -07001623 }
Dave Martin6da80ce2010-07-30 09:50:09 -03001624 break;
Arnaldo Carvalho de Melo878b4392011-03-11 13:13:36 -03001625 case SYMTAB__FEDORA_DEBUGINFO:
David Ahernec5761e2010-12-09 13:27:07 -07001626 snprintf(name, size, "%s/usr/lib/debug%s.debug",
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001627 symbol_conf.symfs, dso->long_name);
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001628 break;
Arnaldo Carvalho de Melo878b4392011-03-11 13:13:36 -03001629 case SYMTAB__UBUNTU_DEBUGINFO:
David Ahernec5761e2010-12-09 13:27:07 -07001630 snprintf(name, size, "%s/usr/lib/debug%s",
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001631 symbol_conf.symfs, dso->long_name);
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001632 break;
Arnaldo Carvalho de Melo878b4392011-03-11 13:13:36 -03001633 case SYMTAB__BUILDID_DEBUGINFO: {
Dave Martin6da80ce2010-07-30 09:50:09 -03001634 char build_id_hex[BUILD_ID_SIZE * 2 + 1];
1635
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001636 if (!dso->has_build_id)
Dave Martin6da80ce2010-07-30 09:50:09 -03001637 continue;
1638
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001639 build_id__sprintf(dso->build_id,
1640 sizeof(dso->build_id),
Dave Martin6da80ce2010-07-30 09:50:09 -03001641 build_id_hex);
1642 snprintf(name, size,
David Ahernec5761e2010-12-09 13:27:07 -07001643 "%s/usr/lib/debug/.build-id/%.2s/%s.debug",
1644 symbol_conf.symfs, build_id_hex, build_id_hex + 2);
Arnaldo Carvalho de Melo4d1e00a2009-08-05 19:02:49 -03001645 }
Dave Martin6da80ce2010-07-30 09:50:09 -03001646 break;
Arnaldo Carvalho de Melo878b4392011-03-11 13:13:36 -03001647 case SYMTAB__SYSTEM_PATH_DSO:
David Ahernec5761e2010-12-09 13:27:07 -07001648 snprintf(name, size, "%s%s",
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001649 symbol_conf.symfs, dso->long_name);
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001650 break;
Arnaldo Carvalho de Melo878b4392011-03-11 13:13:36 -03001651 case SYMTAB__GUEST_KMODULE:
Kyle McMartinfb7d0b32011-01-24 11:13:04 -05001652 if (map->groups && machine)
1653 root_dir = machine->root_dir;
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08001654 else
1655 root_dir = "";
David Ahernec5761e2010-12-09 13:27:07 -07001656 snprintf(name, size, "%s%s%s", symbol_conf.symfs,
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001657 root_dir, dso->long_name);
David Ahernec5761e2010-12-09 13:27:07 -07001658 break;
1659
Arnaldo Carvalho de Melo878b4392011-03-11 13:13:36 -03001660 case SYMTAB__SYSTEM_PATH_KMODULE:
David Ahernec5761e2010-12-09 13:27:07 -07001661 snprintf(name, size, "%s%s", symbol_conf.symfs,
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001662 dso->long_name);
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08001663 break;
Arnaldo Carvalho de Melo60e4b102011-03-22 15:42:14 -03001664 default:;
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001665 }
Dave Martin6da80ce2010-07-30 09:50:09 -03001666
1667 /* Name is now the name of the next image to try */
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001668 fd = open(name, O_RDONLY);
Dave Martin6da80ce2010-07-30 09:50:09 -03001669 if (fd < 0)
1670 continue;
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001671
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001672 ret = dso__load_sym(dso, map, name, fd, filter, 0,
Dave Martin6da80ce2010-07-30 09:50:09 -03001673 want_symtab);
1674 close(fd);
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001675
Dave Martin6da80ce2010-07-30 09:50:09 -03001676 /*
1677 * Some people seem to have debuginfo files _WITHOUT_ debug
1678 * info!?!?
1679 */
1680 if (!ret)
1681 continue;
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001682
Dave Martin6da80ce2010-07-30 09:50:09 -03001683 if (ret > 0) {
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001684 int nr_plt = dso__synthesize_plt_symbols(dso, map,
1685 filter);
Dave Martin6da80ce2010-07-30 09:50:09 -03001686 if (nr_plt > 0)
1687 ret += nr_plt;
1688 break;
1689 }
Arnaldo Carvalho de Meloa25e46c2009-07-11 12:18:36 -03001690 }
Dave Martin6da80ce2010-07-30 09:50:09 -03001691
Arnaldo Carvalho de Melo60e4b102011-03-22 15:42:14 -03001692 /*
1693 * If we wanted a full symtab but no image had one,
1694 * relax our requirements and repeat the search.
1695 */
1696 if (ret <= 0 && want_symtab) {
1697 want_symtab = 0;
1698 goto restart;
1699 }
1700
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001701 free(name);
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001702 if (ret < 0 && strstr(dso->name, " (deleted)") != NULL)
Arnaldo Carvalho de Melo1340e6b2009-08-11 17:04:36 -03001703 return 0;
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001704 return ret;
1705}
1706
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001707struct map *map_groups__find_by_name(struct map_groups *mg,
Arnaldo Carvalho de Melo79406cd2009-12-11 18:50:22 -02001708 enum map_type type, const char *name)
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001709{
1710 struct rb_node *nd;
1711
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001712 for (nd = rb_first(&mg->maps[type]); nd; nd = rb_next(nd)) {
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001713 struct map *map = rb_entry(nd, struct map, rb_node);
1714
Arnaldo Carvalho de Melob7cece72010-01-13 13:22:17 -02001715 if (map->dso && strcmp(map->dso->short_name, name) == 0)
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001716 return map;
1717 }
1718
1719 return NULL;
1720}
1721
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001722static int dso__kernel_module_get_build_id(struct dso *dso,
1723 const char *root_dir)
Arnaldo Carvalho de Melob7cece72010-01-13 13:22:17 -02001724{
1725 char filename[PATH_MAX];
1726 /*
1727 * kernel module short names are of the form "[module]" and
1728 * we need just "module" here.
1729 */
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001730 const char *name = dso->short_name + 1;
Arnaldo Carvalho de Melob7cece72010-01-13 13:22:17 -02001731
1732 snprintf(filename, sizeof(filename),
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08001733 "%s/sys/module/%.*s/notes/.note.gnu.build-id",
1734 root_dir, (int)strlen(name) - 1, name);
Arnaldo Carvalho de Melob7cece72010-01-13 13:22:17 -02001735
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001736 if (sysfs__read_build_id(filename, dso->build_id,
1737 sizeof(dso->build_id)) == 0)
1738 dso->has_build_id = true;
Arnaldo Carvalho de Melob7cece72010-01-13 13:22:17 -02001739
1740 return 0;
1741}
1742
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001743static int map_groups__set_modules_path_dir(struct map_groups *mg,
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08001744 const char *dir_name)
Mike Galbraith6cfcc532009-07-02 08:08:36 +02001745{
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001746 struct dirent *dent;
Arnaldo Carvalho de Melo5aab6212010-03-25 19:59:00 -03001747 DIR *dir = opendir(dir_name);
Gui Jianfeng74534342010-06-24 15:04:02 +08001748 int ret = 0;
Mike Galbraith6cfcc532009-07-02 08:08:36 +02001749
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001750 if (!dir) {
Arnaldo Carvalho de Melo5aab6212010-03-25 19:59:00 -03001751 pr_debug("%s: cannot open %s dir\n", __func__, dir_name);
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001752 return -1;
Mike Galbraith6cfcc532009-07-02 08:08:36 +02001753 }
1754
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001755 while ((dent = readdir(dir)) != NULL) {
1756 char path[PATH_MAX];
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08001757 struct stat st;
Mike Galbraith6cfcc532009-07-02 08:08:36 +02001758
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08001759 /*sshfs might return bad dent->d_type, so we have to stat*/
1760 sprintf(path, "%s/%s", dir_name, dent->d_name);
1761 if (stat(path, &st))
1762 continue;
1763
1764 if (S_ISDIR(st.st_mode)) {
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001765 if (!strcmp(dent->d_name, ".") ||
1766 !strcmp(dent->d_name, ".."))
1767 continue;
Mike Galbraith6cfcc532009-07-02 08:08:36 +02001768
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001769 snprintf(path, sizeof(path), "%s/%s",
Arnaldo Carvalho de Melo5aab6212010-03-25 19:59:00 -03001770 dir_name, dent->d_name);
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001771 ret = map_groups__set_modules_path_dir(mg, path);
Gui Jianfeng74534342010-06-24 15:04:02 +08001772 if (ret < 0)
1773 goto out;
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001774 } else {
1775 char *dot = strrchr(dent->d_name, '.'),
1776 dso_name[PATH_MAX];
1777 struct map *map;
Arnaldo Carvalho de Melocfc10d32009-11-17 15:40:53 -02001778 char *long_name;
Mike Galbraith6cfcc532009-07-02 08:08:36 +02001779
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001780 if (dot == NULL || strcmp(dot, ".ko"))
1781 continue;
1782 snprintf(dso_name, sizeof(dso_name), "[%.*s]",
1783 (int)(dot - dent->d_name), dent->d_name);
Mike Galbraith6cfcc532009-07-02 08:08:36 +02001784
Arnaldo Carvalho de Meloa2a99e82009-10-05 14:26:18 -03001785 strxfrchar(dso_name, '-', '_');
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001786 map = map_groups__find_by_name(mg, MAP__FUNCTION,
1787 dso_name);
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001788 if (map == NULL)
1789 continue;
Mike Galbraith6cfcc532009-07-02 08:08:36 +02001790
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001791 snprintf(path, sizeof(path), "%s/%s",
Arnaldo Carvalho de Melo5aab6212010-03-25 19:59:00 -03001792 dir_name, dent->d_name);
Mike Galbraith6cfcc532009-07-02 08:08:36 +02001793
Arnaldo Carvalho de Melocfc10d32009-11-17 15:40:53 -02001794 long_name = strdup(path);
Gui Jianfeng74534342010-06-24 15:04:02 +08001795 if (long_name == NULL) {
1796 ret = -1;
1797 goto out;
1798 }
Arnaldo Carvalho de Melocfc10d32009-11-17 15:40:53 -02001799 dso__set_long_name(map->dso, long_name);
Arnaldo Carvalho de Melo6e406252010-07-29 15:11:30 -03001800 map->dso->lname_alloc = 1;
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08001801 dso__kernel_module_get_build_id(map->dso, "");
Mike Galbraith6cfcc532009-07-02 08:08:36 +02001802 }
Mike Galbraith6cfcc532009-07-02 08:08:36 +02001803 }
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001804
Gui Jianfeng74534342010-06-24 15:04:02 +08001805out:
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001806 closedir(dir);
Gui Jianfeng74534342010-06-24 15:04:02 +08001807 return ret;
Mike Galbraith6cfcc532009-07-02 08:08:36 +02001808}
1809
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08001810static char *get_kernel_version(const char *root_dir)
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001811{
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08001812 char version[PATH_MAX];
1813 FILE *file;
1814 char *name, *tmp;
1815 const char *prefix = "Linux version ";
1816
1817 sprintf(version, "%s/proc/version", root_dir);
1818 file = fopen(version, "r");
1819 if (!file)
1820 return NULL;
1821
1822 version[0] = '\0';
1823 tmp = fgets(version, sizeof(version), file);
1824 fclose(file);
1825
1826 name = strstr(version, prefix);
1827 if (!name)
1828 return NULL;
1829 name += strlen(prefix);
1830 tmp = strchr(name, ' ');
1831 if (tmp)
1832 *tmp = '\0';
1833
1834 return strdup(name);
1835}
1836
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001837static int machine__set_modules_path(struct machine *machine)
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08001838{
1839 char *version;
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001840 char modules_path[PATH_MAX];
1841
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001842 version = get_kernel_version(machine->root_dir);
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08001843 if (!version)
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001844 return -1;
1845
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08001846 snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel",
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001847 machine->root_dir, version);
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08001848 free(version);
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001849
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001850 return map_groups__set_modules_path_dir(&machine->kmaps, modules_path);
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001851}
1852
1853/*
1854 * Constructor variant for modules (where we know from /proc/modules where
1855 * they are loaded) and for vmlinux, where only after we load all the
1856 * symbols we'll know where it starts and ends.
1857 */
Arnaldo Carvalho de Melo36105832009-11-27 16:29:16 -02001858static struct map *map__new2(u64 start, struct dso *dso, enum map_type type)
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001859{
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001860 struct map *map = calloc(1, (sizeof(*map) +
1861 (dso->kernel ? sizeof(struct kmap) : 0)));
1862 if (map != NULL) {
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001863 /*
Arnaldo Carvalho de Meloafb7b4f2009-10-30 16:28:23 -02001864 * ->end will be filled after we load all the symbols
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001865 */
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001866 map__init(map, type, start, 0, 0, dso);
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001867 }
Arnaldo Carvalho de Meloafb7b4f2009-10-30 16:28:23 -02001868
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001869 return map;
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001870}
1871
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001872struct map *machine__new_module(struct machine *machine, u64 start,
Arnaldo Carvalho de Melod28c6222010-04-27 21:20:43 -03001873 const char *filename)
Arnaldo Carvalho de Melob7cece72010-01-13 13:22:17 -02001874{
1875 struct map *map;
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001876 struct dso *dso = __dsos__findnew(&machine->kernel_dsos, filename);
Arnaldo Carvalho de Melob7cece72010-01-13 13:22:17 -02001877
1878 if (dso == NULL)
1879 return NULL;
1880
1881 map = map__new2(start, dso, MAP__FUNCTION);
1882 if (map == NULL)
1883 return NULL;
1884
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001885 if (machine__is_host(machine))
Arnaldo Carvalho de Melo878b4392011-03-11 13:13:36 -03001886 dso->symtab_type = SYMTAB__SYSTEM_PATH_KMODULE;
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08001887 else
Arnaldo Carvalho de Melo878b4392011-03-11 13:13:36 -03001888 dso->symtab_type = SYMTAB__GUEST_KMODULE;
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001889 map_groups__insert(&machine->kmaps, map);
Arnaldo Carvalho de Melob7cece72010-01-13 13:22:17 -02001890 return map;
1891}
1892
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001893static int machine__create_modules(struct machine *machine)
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001894{
1895 char *line = NULL;
1896 size_t n;
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08001897 FILE *file;
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001898 struct map *map;
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08001899 const char *modules;
1900 char path[PATH_MAX];
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001901
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001902 if (machine__is_default_guest(machine))
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08001903 modules = symbol_conf.default_guest_modules;
1904 else {
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001905 sprintf(path, "%s/proc/modules", machine->root_dir);
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08001906 modules = path;
1907 }
1908
Arnaldo Carvalho de Meloec80fde2011-05-26 09:53:51 -03001909 if (symbol__restricted_filename(path, "/proc/modules"))
1910 return -1;
1911
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08001912 file = fopen(modules, "r");
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001913 if (file == NULL)
1914 return -1;
1915
1916 while (!feof(file)) {
1917 char name[PATH_MAX];
1918 u64 start;
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001919 char *sep;
1920 int line_len;
1921
1922 line_len = getline(&line, &n, file);
1923 if (line_len < 0)
1924 break;
1925
1926 if (!line)
1927 goto out_failure;
1928
1929 line[--line_len] = '\0'; /* \n */
1930
1931 sep = strrchr(line, 'x');
1932 if (sep == NULL)
1933 continue;
1934
1935 hex2u64(sep + 1, &start);
1936
1937 sep = strchr(line, ' ');
1938 if (sep == NULL)
1939 continue;
1940
1941 *sep = '\0';
1942
1943 snprintf(name, sizeof(name), "[%s]", line);
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001944 map = machine__new_module(machine, start, name);
Arnaldo Carvalho de Melob7cece72010-01-13 13:22:17 -02001945 if (map == NULL)
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001946 goto out_delete_line;
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001947 dso__kernel_module_get_build_id(map->dso, machine->root_dir);
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001948 }
1949
1950 free(line);
1951 fclose(file);
1952
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001953 return machine__set_modules_path(machine);
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03001954
1955out_delete_line:
1956 free(line);
1957out_failure:
1958 return -1;
1959}
1960
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001961int dso__load_vmlinux(struct dso *dso, struct map *map,
Franck Bui-Huufd930ff2010-12-10 14:06:03 +01001962 const char *vmlinux, symbol_filter_t filter)
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001963{
Arnaldo Carvalho de Melofbd733b2009-11-20 20:51:28 -02001964 int err = -1, fd;
David Ahernec5761e2010-12-09 13:27:07 -07001965 char symfs_vmlinux[PATH_MAX];
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001966
Arnaldo Carvalho de Meloa639dc62011-02-28 13:54:38 -03001967 snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s%s",
David Ahernec5761e2010-12-09 13:27:07 -07001968 symbol_conf.symfs, vmlinux);
1969 fd = open(symfs_vmlinux, O_RDONLY);
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001970 if (fd < 0)
1971 return -1;
1972
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001973 dso__set_long_name(dso, (char *)vmlinux);
1974 dso__set_loaded(dso, map->type);
1975 err = dso__load_sym(dso, map, symfs_vmlinux, fd, filter, 0, 0);
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001976 close(fd);
1977
Arnaldo Carvalho de Melo3846df22010-02-22 16:15:39 -03001978 if (err > 0)
David Ahernec5761e2010-12-09 13:27:07 -07001979 pr_debug("Using %s for symbols\n", symfs_vmlinux);
Arnaldo Carvalho de Melo3846df22010-02-22 16:15:39 -03001980
Arnaldo Carvalho de Meloa2928c42009-05-28 14:55:04 -03001981 return err;
1982}
1983
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001984int dso__load_vmlinux_path(struct dso *dso, struct map *map,
Arnaldo Carvalho de Melo9de89fe2010-02-03 16:52:00 -02001985 symbol_filter_t filter)
Arnaldo Carvalho de Meloa19afe42010-01-27 21:05:50 -02001986{
1987 int i, err = 0;
Arnaldo Carvalho de Melo5ad90e42010-05-26 13:26:02 -03001988 char *filename;
Arnaldo Carvalho de Meloa19afe42010-01-27 21:05:50 -02001989
1990 pr_debug("Looking at the vmlinux_path (%d entries long)\n",
Arnaldo Carvalho de Melo5ad90e42010-05-26 13:26:02 -03001991 vmlinux_path__nr_entries + 1);
1992
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001993 filename = dso__build_id_filename(dso, NULL, 0);
Arnaldo Carvalho de Melo5ad90e42010-05-26 13:26:02 -03001994 if (filename != NULL) {
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001995 err = dso__load_vmlinux(dso, map, filename, filter);
Arnaldo Carvalho de Melo5ad90e42010-05-26 13:26:02 -03001996 if (err > 0) {
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03001997 dso__set_long_name(dso, filename);
Arnaldo Carvalho de Melo5ad90e42010-05-26 13:26:02 -03001998 goto out;
1999 }
2000 free(filename);
2001 }
Arnaldo Carvalho de Meloa19afe42010-01-27 21:05:50 -02002002
2003 for (i = 0; i < vmlinux_path__nr_entries; ++i) {
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002004 err = dso__load_vmlinux(dso, map, vmlinux_path[i], filter);
Arnaldo Carvalho de Meloa19afe42010-01-27 21:05:50 -02002005 if (err > 0) {
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002006 dso__set_long_name(dso, strdup(vmlinux_path[i]));
Arnaldo Carvalho de Meloa19afe42010-01-27 21:05:50 -02002007 break;
2008 }
2009 }
Arnaldo Carvalho de Melo5ad90e42010-05-26 13:26:02 -03002010out:
Arnaldo Carvalho de Meloa19afe42010-01-27 21:05:50 -02002011 return err;
2012}
2013
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002014static int dso__load_kernel_sym(struct dso *dso, struct map *map,
Arnaldo Carvalho de Melo9de89fe2010-02-03 16:52:00 -02002015 symbol_filter_t filter)
Arnaldo Carvalho de Meloa827c872009-05-28 14:55:19 -03002016{
Arnaldo Carvalho de Melocc612d82009-11-23 16:39:10 -02002017 int err;
Arnaldo Carvalho de Melo9e201442010-01-14 18:30:06 -02002018 const char *kallsyms_filename = NULL;
2019 char *kallsyms_allocated_filename = NULL;
Arnaldo Carvalho de Melodc8d6ab2010-01-19 10:36:14 -02002020 /*
David Ahernb226a5a2010-12-07 19:39:46 -07002021 * Step 1: if the user specified a kallsyms or vmlinux filename, use
2022 * it and only it, reporting errors to the user if it cannot be used.
Arnaldo Carvalho de Melodc8d6ab2010-01-19 10:36:14 -02002023 *
2024 * For instance, try to analyse an ARM perf.data file _without_ a
2025 * build-id, or if the user specifies the wrong path to the right
2026 * vmlinux file, obviously we can't fallback to another vmlinux (a
2027 * x86_86 one, on the machine where analysis is being performed, say),
2028 * or worse, /proc/kallsyms.
2029 *
2030 * If the specified file _has_ a build-id and there is a build-id
2031 * section in the perf.data file, we will still do the expected
2032 * validation in dso__load_vmlinux and will bail out if they don't
2033 * match.
2034 */
David Ahernb226a5a2010-12-07 19:39:46 -07002035 if (symbol_conf.kallsyms_name != NULL) {
2036 kallsyms_filename = symbol_conf.kallsyms_name;
2037 goto do_kallsyms;
2038 }
2039
Arnaldo Carvalho de Melodc8d6ab2010-01-19 10:36:14 -02002040 if (symbol_conf.vmlinux_name != NULL) {
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002041 err = dso__load_vmlinux(dso, map,
Arnaldo Carvalho de Melodc8d6ab2010-01-19 10:36:14 -02002042 symbol_conf.vmlinux_name, filter);
Arnaldo Carvalho de Meloe7dadc02010-06-03 18:35:55 -03002043 if (err > 0) {
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002044 dso__set_long_name(dso,
Arnaldo Carvalho de Meloe7dadc02010-06-03 18:35:55 -03002045 strdup(symbol_conf.vmlinux_name));
2046 goto out_fixup;
2047 }
2048 return err;
Arnaldo Carvalho de Melodc8d6ab2010-01-19 10:36:14 -02002049 }
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03002050
Arnaldo Carvalho de Melocc612d82009-11-23 16:39:10 -02002051 if (vmlinux_path != NULL) {
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002052 err = dso__load_vmlinux_path(dso, map, filter);
Arnaldo Carvalho de Meloa19afe42010-01-27 21:05:50 -02002053 if (err > 0)
2054 goto out_fixup;
Arnaldo Carvalho de Melocc612d82009-11-23 16:39:10 -02002055 }
2056
David Ahernec5761e2010-12-09 13:27:07 -07002057 /* do not try local files if a symfs was given */
2058 if (symbol_conf.symfs[0] != 0)
2059 return -1;
2060
Arnaldo Carvalho de Melob7cece72010-01-13 13:22:17 -02002061 /*
2062 * Say the kernel DSO was created when processing the build-id header table,
2063 * we have a build-id, so check if it is the same as the running kernel,
2064 * using it if it is.
2065 */
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002066 if (dso->has_build_id) {
Arnaldo Carvalho de Melob7cece72010-01-13 13:22:17 -02002067 u8 kallsyms_build_id[BUILD_ID_SIZE];
Arnaldo Carvalho de Melo9e201442010-01-14 18:30:06 -02002068 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
Arnaldo Carvalho de Melob7cece72010-01-13 13:22:17 -02002069
2070 if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id,
Arnaldo Carvalho de Melo8d0591f2010-01-14 18:30:05 -02002071 sizeof(kallsyms_build_id)) == 0) {
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002072 if (dso__build_id_equal(dso, kallsyms_build_id)) {
Arnaldo Carvalho de Melo9e201442010-01-14 18:30:06 -02002073 kallsyms_filename = "/proc/kallsyms";
Arnaldo Carvalho de Melo8d0591f2010-01-14 18:30:05 -02002074 goto do_kallsyms;
Arnaldo Carvalho de Melo9e201442010-01-14 18:30:06 -02002075 }
Arnaldo Carvalho de Melo8d0591f2010-01-14 18:30:05 -02002076 }
Arnaldo Carvalho de Melodc8d6ab2010-01-19 10:36:14 -02002077 /*
2078 * Now look if we have it on the build-id cache in
2079 * $HOME/.debug/[kernel.kallsyms].
2080 */
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002081 build_id__sprintf(dso->build_id, sizeof(dso->build_id),
Arnaldo Carvalho de Melo9e201442010-01-14 18:30:06 -02002082 sbuild_id);
2083
2084 if (asprintf(&kallsyms_allocated_filename,
2085 "%s/.debug/[kernel.kallsyms]/%s",
Arnaldo Carvalho de Melo3846df22010-02-22 16:15:39 -03002086 getenv("HOME"), sbuild_id) == -1) {
2087 pr_err("Not enough memory for kallsyms file lookup\n");
Arnaldo Carvalho de Melo8d0591f2010-01-14 18:30:05 -02002088 return -1;
Arnaldo Carvalho de Melo3846df22010-02-22 16:15:39 -03002089 }
Arnaldo Carvalho de Melo8d0591f2010-01-14 18:30:05 -02002090
Arnaldo Carvalho de Melo19fc2de2010-01-22 14:35:02 -02002091 kallsyms_filename = kallsyms_allocated_filename;
2092
Arnaldo Carvalho de Melodc8d6ab2010-01-19 10:36:14 -02002093 if (access(kallsyms_filename, F_OK)) {
Arnaldo Carvalho de Melo3846df22010-02-22 16:15:39 -03002094 pr_err("No kallsyms or vmlinux with build-id %s "
2095 "was found\n", sbuild_id);
Arnaldo Carvalho de Melodc8d6ab2010-01-19 10:36:14 -02002096 free(kallsyms_allocated_filename);
2097 return -1;
2098 }
Arnaldo Carvalho de Melodc8d6ab2010-01-19 10:36:14 -02002099 } else {
2100 /*
2101 * Last resort, if we don't have a build-id and couldn't find
2102 * any vmlinux file, try the running kernel kallsyms table.
2103 */
2104 kallsyms_filename = "/proc/kallsyms";
Arnaldo Carvalho de Meloef6ae722009-11-20 20:51:29 -02002105 }
Arnaldo Carvalho de Meloa827c872009-05-28 14:55:19 -03002106
Arnaldo Carvalho de Melodc8d6ab2010-01-19 10:36:14 -02002107do_kallsyms:
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002108 err = dso__load_kallsyms(dso, kallsyms_filename, map, filter);
Arnaldo Carvalho de Melo3846df22010-02-22 16:15:39 -03002109 if (err > 0)
2110 pr_debug("Using %s for symbols\n", kallsyms_filename);
Arnaldo Carvalho de Melodc8d6ab2010-01-19 10:36:14 -02002111 free(kallsyms_allocated_filename);
2112
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03002113 if (err > 0) {
Arnaldo Carvalho de Melocc612d82009-11-23 16:39:10 -02002114out_fixup:
Arnaldo Carvalho de Meloe1c7c6a2010-01-22 14:35:01 -02002115 if (kallsyms_filename != NULL)
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002116 dso__set_long_name(dso, strdup("[kernel.kallsyms]"));
Arnaldo Carvalho de Melo6a4694a2009-11-27 16:29:17 -02002117 map__fixup_start(map);
2118 map__fixup_end(map);
Arnaldo Carvalho de Melo439d4732009-10-02 03:29:58 -03002119 }
Arnaldo Carvalho de Melo94cb9e32009-08-06 14:43:17 -03002120
Arnaldo Carvalho de Meloa827c872009-05-28 14:55:19 -03002121 return err;
2122}
2123
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002124static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map,
2125 symbol_filter_t filter)
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08002126{
2127 int err;
2128 const char *kallsyms_filename = NULL;
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -03002129 struct machine *machine;
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08002130 char path[PATH_MAX];
2131
2132 if (!map->groups) {
2133 pr_debug("Guest kernel map hasn't the point to groups\n");
2134 return -1;
2135 }
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -03002136 machine = map->groups->machine;
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08002137
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -03002138 if (machine__is_default_guest(machine)) {
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08002139 /*
2140 * if the user specified a vmlinux filename, use it and only
2141 * it, reporting errors to the user if it cannot be used.
2142 * Or use file guest_kallsyms inputted by user on commandline
2143 */
2144 if (symbol_conf.default_guest_vmlinux_name != NULL) {
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002145 err = dso__load_vmlinux(dso, map,
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08002146 symbol_conf.default_guest_vmlinux_name, filter);
2147 goto out_try_fixup;
2148 }
2149
2150 kallsyms_filename = symbol_conf.default_guest_kallsyms;
2151 if (!kallsyms_filename)
2152 return -1;
2153 } else {
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -03002154 sprintf(path, "%s/proc/kallsyms", machine->root_dir);
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08002155 kallsyms_filename = path;
2156 }
2157
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002158 err = dso__load_kallsyms(dso, kallsyms_filename, map, filter);
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08002159 if (err > 0)
2160 pr_debug("Using %s for symbols\n", kallsyms_filename);
2161
2162out_try_fixup:
2163 if (err > 0) {
2164 if (kallsyms_filename != NULL) {
Arnaldo Carvalho de Melo48ea8f52010-04-27 21:19:05 -03002165 machine__mmap_name(machine, path, sizeof(path));
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002166 dso__set_long_name(dso, strdup(path));
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08002167 }
2168 map__fixup_start(map);
2169 map__fixup_end(map);
2170 }
2171
2172 return err;
2173}
Frederic Weisbeckercd84c2a2009-08-12 10:03:49 +02002174
Arnaldo Carvalho de Melob0da9542009-11-27 16:29:14 -02002175static void dsos__add(struct list_head *head, struct dso *dso)
Frederic Weisbeckercd84c2a2009-08-12 10:03:49 +02002176{
Arnaldo Carvalho de Melob0da9542009-11-27 16:29:14 -02002177 list_add_tail(&dso->node, head);
Frederic Weisbeckercd84c2a2009-08-12 10:03:49 +02002178}
2179
Arnaldo Carvalho de Melob0da9542009-11-27 16:29:14 -02002180static struct dso *dsos__find(struct list_head *head, const char *name)
Frederic Weisbeckercd84c2a2009-08-12 10:03:49 +02002181{
2182 struct dso *pos;
2183
Arnaldo Carvalho de Melob0da9542009-11-27 16:29:14 -02002184 list_for_each_entry(pos, head, node)
Arnaldo Carvalho de Melocf4e5b02010-01-14 23:45:27 -02002185 if (strcmp(pos->long_name, name) == 0)
Frederic Weisbeckercd84c2a2009-08-12 10:03:49 +02002186 return pos;
2187 return NULL;
2188}
2189
Arnaldo Carvalho de Meloa89e5ab2010-01-07 19:59:39 -02002190struct dso *__dsos__findnew(struct list_head *head, const char *name)
Frederic Weisbeckercd84c2a2009-08-12 10:03:49 +02002191{
Arnaldo Carvalho de Meloa89e5ab2010-01-07 19:59:39 -02002192 struct dso *dso = dsos__find(head, name);
Frederic Weisbeckercd84c2a2009-08-12 10:03:49 +02002193
Arnaldo Carvalho de Meloe4204992009-10-20 14:25:40 -02002194 if (!dso) {
Arnaldo Carvalho de Melo00a192b2009-10-30 16:28:24 -02002195 dso = dso__new(name);
Arnaldo Carvalho de Melocfc10d32009-11-17 15:40:53 -02002196 if (dso != NULL) {
Arnaldo Carvalho de Meloa89e5ab2010-01-07 19:59:39 -02002197 dsos__add(head, dso);
Arnaldo Carvalho de Melocfc10d32009-11-17 15:40:53 -02002198 dso__set_basename(dso);
2199 }
Arnaldo Carvalho de Melo66bd8422009-10-28 21:51:21 -02002200 }
Frederic Weisbeckercd84c2a2009-08-12 10:03:49 +02002201
2202 return dso;
Frederic Weisbeckercd84c2a2009-08-12 10:03:49 +02002203}
2204
Arnaldo Carvalho de Melo1f626bc2010-05-09 19:57:08 -03002205size_t __dsos__fprintf(struct list_head *head, FILE *fp)
Frederic Weisbeckercd84c2a2009-08-12 10:03:49 +02002206{
2207 struct dso *pos;
Arnaldo Carvalho de Melocbf69682010-04-27 21:22:44 -03002208 size_t ret = 0;
Frederic Weisbeckercd84c2a2009-08-12 10:03:49 +02002209
Arnaldo Carvalho de Melo95011c62009-11-27 16:29:20 -02002210 list_for_each_entry(pos, head, node) {
2211 int i;
2212 for (i = 0; i < MAP__NR_TYPES; ++i)
Arnaldo Carvalho de Melocbf69682010-04-27 21:22:44 -03002213 ret += dso__fprintf(pos, i, fp);
Arnaldo Carvalho de Melo95011c62009-11-27 16:29:20 -02002214 }
Arnaldo Carvalho de Melocbf69682010-04-27 21:22:44 -03002215
2216 return ret;
Frederic Weisbeckercd84c2a2009-08-12 10:03:49 +02002217}
2218
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002219size_t machines__fprintf_dsos(struct rb_root *machines, FILE *fp)
Arnaldo Carvalho de Melob0da9542009-11-27 16:29:14 -02002220{
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08002221 struct rb_node *nd;
Arnaldo Carvalho de Melocbf69682010-04-27 21:22:44 -03002222 size_t ret = 0;
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08002223
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002224 for (nd = rb_first(machines); nd; nd = rb_next(nd)) {
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -03002225 struct machine *pos = rb_entry(nd, struct machine, rb_node);
Arnaldo Carvalho de Melocbf69682010-04-27 21:22:44 -03002226 ret += __dsos__fprintf(&pos->kernel_dsos, fp);
2227 ret += __dsos__fprintf(&pos->user_dsos, fp);
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08002228 }
Arnaldo Carvalho de Melocbf69682010-04-27 21:22:44 -03002229
2230 return ret;
Arnaldo Carvalho de Melob0da9542009-11-27 16:29:14 -02002231}
2232
Arnaldo Carvalho de Melo88d3d9b72010-01-14 23:45:30 -02002233static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp,
2234 bool with_hits)
Arnaldo Carvalho de Melo9e03eb22009-11-16 16:32:44 -02002235{
2236 struct dso *pos;
2237 size_t ret = 0;
2238
Arnaldo Carvalho de Melob0da9542009-11-27 16:29:14 -02002239 list_for_each_entry(pos, head, node) {
Arnaldo Carvalho de Melo88d3d9b72010-01-14 23:45:30 -02002240 if (with_hits && !pos->hit)
2241 continue;
Arnaldo Carvalho de Melo9e03eb22009-11-16 16:32:44 -02002242 ret += dso__fprintf_buildid(pos, fp);
Arnaldo Carvalho de Melo1124ba72009-11-16 21:45:25 -02002243 ret += fprintf(fp, " %s\n", pos->long_name);
Arnaldo Carvalho de Melo9e03eb22009-11-16 16:32:44 -02002244 }
2245 return ret;
2246}
2247
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002248size_t machine__fprintf_dsos_buildid(struct machine *machine, FILE *fp,
2249 bool with_hits)
Arnaldo Carvalho de Melof8690972010-05-19 13:41:23 -03002250{
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002251 return __dsos__fprintf_buildid(&machine->kernel_dsos, fp, with_hits) +
2252 __dsos__fprintf_buildid(&machine->user_dsos, fp, with_hits);
Arnaldo Carvalho de Melof8690972010-05-19 13:41:23 -03002253}
2254
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002255size_t machines__fprintf_dsos_buildid(struct rb_root *machines,
2256 FILE *fp, bool with_hits)
Arnaldo Carvalho de Melob0da9542009-11-27 16:29:14 -02002257{
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08002258 struct rb_node *nd;
2259 size_t ret = 0;
2260
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002261 for (nd = rb_first(machines); nd; nd = rb_next(nd)) {
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -03002262 struct machine *pos = rb_entry(nd, struct machine, rb_node);
Arnaldo Carvalho de Melof8690972010-05-19 13:41:23 -03002263 ret += machine__fprintf_dsos_buildid(pos, fp, with_hits);
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08002264 }
2265 return ret;
Arnaldo Carvalho de Melob0da9542009-11-27 16:29:14 -02002266}
2267
Jiri Olsaf57b05e2011-06-01 21:43:46 +02002268static struct dso*
2269dso__kernel_findnew(struct machine *machine, const char *name,
2270 const char *short_name, int dso_type)
Arnaldo Carvalho de Melofd1d9082010-01-27 21:05:51 -02002271{
Jiri Olsaf57b05e2011-06-01 21:43:46 +02002272 /*
2273 * The kernel dso could be created by build_id processing.
2274 */
2275 struct dso *dso = __dsos__findnew(&machine->kernel_dsos, name);
Arnaldo Carvalho de Melofd1d9082010-01-27 21:05:51 -02002276
Jiri Olsaf57b05e2011-06-01 21:43:46 +02002277 /*
2278 * We need to run this in all cases, since during the build_id
2279 * processing we had no idea this was the kernel dso.
2280 */
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002281 if (dso != NULL) {
Jiri Olsaf57b05e2011-06-01 21:43:46 +02002282 dso__set_short_name(dso, short_name);
2283 dso->kernel = dso_type;
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08002284 }
2285
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002286 return dso;
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08002287}
2288
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002289void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine)
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08002290{
2291 char path[PATH_MAX];
2292
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -03002293 if (machine__is_default_guest(machine))
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08002294 return;
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -03002295 sprintf(path, "%s/sys/kernel/notes", machine->root_dir);
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002296 if (sysfs__read_build_id(path, dso->build_id,
2297 sizeof(dso->build_id)) == 0)
2298 dso->has_build_id = true;
Arnaldo Carvalho de Melofd1d9082010-01-27 21:05:51 -02002299}
2300
Jiri Olsaf57b05e2011-06-01 21:43:46 +02002301static struct dso *machine__get_kernel(struct machine *machine)
Frederic Weisbeckercd84c2a2009-08-12 10:03:49 +02002302{
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08002303 const char *vmlinux_name = NULL;
2304 struct dso *kernel;
Frederic Weisbeckercd84c2a2009-08-12 10:03:49 +02002305
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002306 if (machine__is_host(machine)) {
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08002307 vmlinux_name = symbol_conf.vmlinux_name;
Jiri Olsaf57b05e2011-06-01 21:43:46 +02002308 if (!vmlinux_name)
2309 vmlinux_name = "[kernel.kallsyms]";
2310
2311 kernel = dso__kernel_findnew(machine, vmlinux_name,
2312 "[kernel]",
2313 DSO_TYPE_KERNEL);
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08002314 } else {
Jiri Olsaf57b05e2011-06-01 21:43:46 +02002315 char bf[PATH_MAX];
2316
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002317 if (machine__is_default_guest(machine))
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08002318 vmlinux_name = symbol_conf.default_guest_vmlinux_name;
Jiri Olsaf57b05e2011-06-01 21:43:46 +02002319 if (!vmlinux_name)
2320 vmlinux_name = machine__mmap_name(machine, bf,
2321 sizeof(bf));
2322
2323 kernel = dso__kernel_findnew(machine, vmlinux_name,
2324 "[guest.kernel]",
2325 DSO_TYPE_GUEST_KERNEL);
Arnaldo Carvalho de Melo8d92c022010-02-03 16:52:02 -02002326 }
Frederic Weisbeckercd84c2a2009-08-12 10:03:49 +02002327
Jiri Olsaf57b05e2011-06-01 21:43:46 +02002328 if (kernel != NULL && (!kernel->has_build_id))
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002329 dso__read_running_kernel_build_id(kernel, machine);
Jiri Olsaf57b05e2011-06-01 21:43:46 +02002330
Arnaldo Carvalho de Melof1dfa0b2009-12-11 14:50:39 -02002331 return kernel;
Arnaldo Carvalho de Melof1dfa0b2009-12-11 14:50:39 -02002332}
2333
Ming Leid214afb2010-11-25 19:27:25 +08002334struct process_args {
2335 u64 start;
2336};
2337
2338static int symbol__in_kernel(void *arg, const char *name,
Arnaldo Carvalho de Melo3b01a412010-12-22 01:08:36 -02002339 char type __used, u64 start, u64 end __used)
Ming Leid214afb2010-11-25 19:27:25 +08002340{
2341 struct process_args *args = arg;
2342
2343 if (strchr(name, '['))
2344 return 0;
2345
2346 args->start = start;
2347 return 1;
2348}
2349
2350/* Figure out the start address of kernel map from /proc/kallsyms */
2351static u64 machine__get_kernel_start_addr(struct machine *machine)
2352{
2353 const char *filename;
2354 char path[PATH_MAX];
2355 struct process_args args;
2356
2357 if (machine__is_host(machine)) {
2358 filename = "/proc/kallsyms";
2359 } else {
2360 if (machine__is_default_guest(machine))
2361 filename = (char *)symbol_conf.default_guest_kallsyms;
2362 else {
2363 sprintf(path, "%s/proc/kallsyms", machine->root_dir);
2364 filename = path;
2365 }
2366 }
2367
Arnaldo Carvalho de Meloec80fde2011-05-26 09:53:51 -03002368 if (symbol__restricted_filename(filename, "/proc/kallsyms"))
2369 return 0;
2370
Ming Leid214afb2010-11-25 19:27:25 +08002371 if (kallsyms__parse(filename, &args, symbol__in_kernel) <= 0)
2372 return 0;
2373
2374 return args.start;
2375}
2376
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002377int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel)
Arnaldo Carvalho de Melof1dfa0b2009-12-11 14:50:39 -02002378{
Arnaldo Carvalho de Melode176482010-01-04 16:19:29 -02002379 enum map_type type;
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002380 u64 start = machine__get_kernel_start_addr(machine);
Arnaldo Carvalho de Melof1dfa0b2009-12-11 14:50:39 -02002381
Arnaldo Carvalho de Melode176482010-01-04 16:19:29 -02002382 for (type = 0; type < MAP__NR_TYPES; ++type) {
Arnaldo Carvalho de Melo9de89fe2010-02-03 16:52:00 -02002383 struct kmap *kmap;
2384
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002385 machine->vmlinux_maps[type] = map__new2(start, kernel, type);
2386 if (machine->vmlinux_maps[type] == NULL)
Arnaldo Carvalho de Melode176482010-01-04 16:19:29 -02002387 return -1;
Arnaldo Carvalho de Melof1dfa0b2009-12-11 14:50:39 -02002388
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002389 machine->vmlinux_maps[type]->map_ip =
2390 machine->vmlinux_maps[type]->unmap_ip =
2391 identity__map_ip;
2392 kmap = map__kmap(machine->vmlinux_maps[type]);
2393 kmap->kmaps = &machine->kmaps;
2394 map_groups__insert(&machine->kmaps,
2395 machine->vmlinux_maps[type]);
Arnaldo Carvalho de Melof1dfa0b2009-12-11 14:50:39 -02002396 }
2397
Arnaldo Carvalho de Melof1dfa0b2009-12-11 14:50:39 -02002398 return 0;
Arnaldo Carvalho de Melo24460422009-11-18 20:20:53 -02002399}
2400
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002401void machine__destroy_kernel_maps(struct machine *machine)
Arnaldo Carvalho de Melo076c6e452010-08-02 18:18:28 -03002402{
2403 enum map_type type;
2404
2405 for (type = 0; type < MAP__NR_TYPES; ++type) {
2406 struct kmap *kmap;
2407
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002408 if (machine->vmlinux_maps[type] == NULL)
Arnaldo Carvalho de Melo076c6e452010-08-02 18:18:28 -03002409 continue;
2410
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002411 kmap = map__kmap(machine->vmlinux_maps[type]);
2412 map_groups__remove(&machine->kmaps,
2413 machine->vmlinux_maps[type]);
Arnaldo Carvalho de Melo076c6e452010-08-02 18:18:28 -03002414 if (kmap->ref_reloc_sym) {
2415 /*
2416 * ref_reloc_sym is shared among all maps, so free just
2417 * on one of them.
2418 */
2419 if (type == MAP__FUNCTION) {
2420 free((char *)kmap->ref_reloc_sym->name);
2421 kmap->ref_reloc_sym->name = NULL;
2422 free(kmap->ref_reloc_sym);
2423 }
2424 kmap->ref_reloc_sym = NULL;
2425 }
2426
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002427 map__delete(machine->vmlinux_maps[type]);
2428 machine->vmlinux_maps[type] = NULL;
Arnaldo Carvalho de Melo076c6e452010-08-02 18:18:28 -03002429 }
2430}
2431
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002432int machine__create_kernel_maps(struct machine *machine)
Arnaldo Carvalho de Melo5c0541d2010-04-29 15:25:23 -03002433{
Jiri Olsaf57b05e2011-06-01 21:43:46 +02002434 struct dso *kernel = machine__get_kernel(machine);
Arnaldo Carvalho de Melo5c0541d2010-04-29 15:25:23 -03002435
2436 if (kernel == NULL ||
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002437 __machine__create_kernel_maps(machine, kernel) < 0)
Arnaldo Carvalho de Melo5c0541d2010-04-29 15:25:23 -03002438 return -1;
2439
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002440 if (symbol_conf.use_modules && machine__create_modules(machine) < 0)
Arnaldo Carvalho de Melo5c0541d2010-04-29 15:25:23 -03002441 pr_debug("Problems creating module maps, continuing anyway...\n");
2442 /*
2443 * Now that we have all the maps created, just set the ->end of them:
2444 */
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002445 map_groups__fixup_end(&machine->kmaps);
Arnaldo Carvalho de Melo5c0541d2010-04-29 15:25:23 -03002446 return 0;
2447}
2448
Arnaldo Carvalho de Melocc612d82009-11-23 16:39:10 -02002449static void vmlinux_path__exit(void)
Arnaldo Carvalho de Melo24460422009-11-18 20:20:53 -02002450{
Arnaldo Carvalho de Melocc612d82009-11-23 16:39:10 -02002451 while (--vmlinux_path__nr_entries >= 0) {
2452 free(vmlinux_path[vmlinux_path__nr_entries]);
2453 vmlinux_path[vmlinux_path__nr_entries] = NULL;
2454 }
2455
2456 free(vmlinux_path);
2457 vmlinux_path = NULL;
2458}
2459
2460static int vmlinux_path__init(void)
2461{
2462 struct utsname uts;
2463 char bf[PATH_MAX];
2464
Arnaldo Carvalho de Melocc612d82009-11-23 16:39:10 -02002465 vmlinux_path = malloc(sizeof(char *) * 5);
2466 if (vmlinux_path == NULL)
2467 return -1;
2468
2469 vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux");
2470 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2471 goto out_fail;
2472 ++vmlinux_path__nr_entries;
2473 vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux");
2474 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2475 goto out_fail;
2476 ++vmlinux_path__nr_entries;
David Ahernec5761e2010-12-09 13:27:07 -07002477
2478 /* only try running kernel version if no symfs was given */
2479 if (symbol_conf.symfs[0] != 0)
2480 return 0;
2481
2482 if (uname(&uts) < 0)
2483 return -1;
2484
Arnaldo Carvalho de Melocc612d82009-11-23 16:39:10 -02002485 snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release);
2486 vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
2487 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2488 goto out_fail;
2489 ++vmlinux_path__nr_entries;
2490 snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release);
2491 vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
2492 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2493 goto out_fail;
2494 ++vmlinux_path__nr_entries;
2495 snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux",
2496 uts.release);
2497 vmlinux_path[vmlinux_path__nr_entries] = strdup(bf);
2498 if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
2499 goto out_fail;
2500 ++vmlinux_path__nr_entries;
2501
2502 return 0;
2503
2504out_fail:
2505 vmlinux_path__exit();
2506 return -1;
2507}
2508
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002509size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp)
Arnaldo Carvalho de Melob0a9ab62010-03-15 11:46:58 -03002510{
2511 int i;
2512 size_t printed = 0;
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002513 struct dso *kdso = machine->vmlinux_maps[MAP__FUNCTION]->dso;
Arnaldo Carvalho de Melo5ad90e42010-05-26 13:26:02 -03002514
2515 if (kdso->has_build_id) {
2516 char filename[PATH_MAX];
2517 if (dso__build_id_filename(kdso, filename, sizeof(filename)))
2518 printed += fprintf(fp, "[0] %s\n", filename);
2519 }
Arnaldo Carvalho de Melob0a9ab62010-03-15 11:46:58 -03002520
2521 for (i = 0; i < vmlinux_path__nr_entries; ++i)
Arnaldo Carvalho de Melo5ad90e42010-05-26 13:26:02 -03002522 printed += fprintf(fp, "[%d] %s\n",
2523 i + kdso->has_build_id, vmlinux_path[i]);
Arnaldo Carvalho de Melob0a9ab62010-03-15 11:46:58 -03002524
2525 return printed;
2526}
2527
Arnaldo Carvalho de Melo655000e2009-12-15 20:04:40 -02002528static int setup_list(struct strlist **list, const char *list_str,
2529 const char *list_name)
2530{
2531 if (list_str == NULL)
2532 return 0;
2533
2534 *list = strlist__new(true, list_str);
2535 if (!*list) {
2536 pr_err("problems parsing %s list\n", list_name);
2537 return -1;
2538 }
2539 return 0;
2540}
2541
Arnaldo Carvalho de Meloec80fde2011-05-26 09:53:51 -03002542static bool symbol__read_kptr_restrict(void)
2543{
2544 bool value = false;
2545
2546 if (geteuid() != 0) {
2547 FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r");
2548 if (fp != NULL) {
2549 char line[8];
2550
2551 if (fgets(line, sizeof(line), fp) != NULL)
2552 value = atoi(line) != 0;
2553
2554 fclose(fp);
2555 }
2556 }
2557
2558 return value;
2559}
2560
Arnaldo Carvalho de Melo75be6cf2009-12-15 20:04:39 -02002561int symbol__init(void)
Arnaldo Carvalho de Melocc612d82009-11-23 16:39:10 -02002562{
David Ahernec5761e2010-12-09 13:27:07 -07002563 const char *symfs;
2564
Jovi Zhang85e00b52010-09-09 13:30:59 -03002565 if (symbol_conf.initialized)
2566 return 0;
2567
David S. Miller4d439512011-03-29 14:18:39 -03002568 symbol_conf.priv_size = ALIGN(symbol_conf.priv_size, sizeof(u64));
2569
Arnaldo Carvalho de Melo95011c62009-11-27 16:29:20 -02002570 elf_version(EV_CURRENT);
Arnaldo Carvalho de Melo75be6cf2009-12-15 20:04:39 -02002571 if (symbol_conf.sort_by_name)
2572 symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) -
2573 sizeof(struct symbol));
Arnaldo Carvalho de Melob32d1332009-11-24 12:05:15 -02002574
Arnaldo Carvalho de Melo75be6cf2009-12-15 20:04:39 -02002575 if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0)
Arnaldo Carvalho de Melocc612d82009-11-23 16:39:10 -02002576 return -1;
2577
Arnaldo Carvalho de Meloc410a332009-12-15 20:04:41 -02002578 if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') {
2579 pr_err("'.' is the only non valid --field-separator argument\n");
2580 return -1;
2581 }
2582
Arnaldo Carvalho de Melo655000e2009-12-15 20:04:40 -02002583 if (setup_list(&symbol_conf.dso_list,
2584 symbol_conf.dso_list_str, "dso") < 0)
2585 return -1;
2586
2587 if (setup_list(&symbol_conf.comm_list,
2588 symbol_conf.comm_list_str, "comm") < 0)
2589 goto out_free_dso_list;
2590
2591 if (setup_list(&symbol_conf.sym_list,
2592 symbol_conf.sym_list_str, "symbol") < 0)
2593 goto out_free_comm_list;
2594
David Ahernec5761e2010-12-09 13:27:07 -07002595 /*
2596 * A path to symbols of "/" is identical to ""
2597 * reset here for simplicity.
2598 */
2599 symfs = realpath(symbol_conf.symfs, NULL);
2600 if (symfs == NULL)
2601 symfs = symbol_conf.symfs;
2602 if (strcmp(symfs, "/") == 0)
2603 symbol_conf.symfs = "";
2604 if (symfs != symbol_conf.symfs)
2605 free((void *)symfs);
2606
Arnaldo Carvalho de Meloec80fde2011-05-26 09:53:51 -03002607 symbol_conf.kptr_restrict = symbol__read_kptr_restrict();
2608
Jovi Zhang85e00b52010-09-09 13:30:59 -03002609 symbol_conf.initialized = true;
Arnaldo Carvalho de Melo4aa65632009-12-13 19:50:29 -02002610 return 0;
Arnaldo Carvalho de Melo655000e2009-12-15 20:04:40 -02002611
2612out_free_dso_list:
2613 strlist__delete(symbol_conf.dso_list);
2614out_free_comm_list:
2615 strlist__delete(symbol_conf.comm_list);
2616 return -1;
Arnaldo Carvalho de Melo4aa65632009-12-13 19:50:29 -02002617}
Arnaldo Carvalho de Melocc612d82009-11-23 16:39:10 -02002618
Arnaldo Carvalho de Melod65a4582010-07-30 18:31:28 -03002619void symbol__exit(void)
2620{
Jovi Zhang85e00b52010-09-09 13:30:59 -03002621 if (!symbol_conf.initialized)
2622 return;
Arnaldo Carvalho de Melod65a4582010-07-30 18:31:28 -03002623 strlist__delete(symbol_conf.sym_list);
2624 strlist__delete(symbol_conf.dso_list);
2625 strlist__delete(symbol_conf.comm_list);
2626 vmlinux_path__exit();
2627 symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL;
Jovi Zhang85e00b52010-09-09 13:30:59 -03002628 symbol_conf.initialized = false;
Arnaldo Carvalho de Melod65a4582010-07-30 18:31:28 -03002629}
2630
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002631int machines__create_kernel_maps(struct rb_root *machines, pid_t pid)
Arnaldo Carvalho de Melo4aa65632009-12-13 19:50:29 -02002632{
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002633 struct machine *machine = machines__findnew(machines, pid);
Arnaldo Carvalho de Melo9de89fe2010-02-03 16:52:00 -02002634
Arnaldo Carvalho de Melo23346f22010-04-27 21:17:50 -03002635 if (machine == NULL)
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08002636 return -1;
Arnaldo Carvalho de Melo4aa65632009-12-13 19:50:29 -02002637
Arnaldo Carvalho de Melo5c0541d2010-04-29 15:25:23 -03002638 return machine__create_kernel_maps(machine);
Frederic Weisbeckercd84c2a2009-08-12 10:03:49 +02002639}
Arnaldo Carvalho de Melo5aab6212010-03-25 19:59:00 -03002640
2641static int hex(char ch)
2642{
2643 if ((ch >= '0') && (ch <= '9'))
2644 return ch - '0';
2645 if ((ch >= 'a') && (ch <= 'f'))
2646 return ch - 'a' + 10;
2647 if ((ch >= 'A') && (ch <= 'F'))
2648 return ch - 'A' + 10;
2649 return -1;
2650}
2651
2652/*
2653 * While we find nice hex chars, build a long_val.
2654 * Return number of chars processed.
2655 */
2656int hex2u64(const char *ptr, u64 *long_val)
2657{
2658 const char *p = ptr;
2659 *long_val = 0;
2660
2661 while (*p) {
2662 const int hex_val = hex(*p);
2663
2664 if (hex_val < 0)
2665 break;
2666
2667 *long_val = (*long_val << 4) | hex_val;
2668 p++;
2669 }
2670
2671 return p - ptr;
2672}
2673
2674char *strxfrchar(char *s, char from, char to)
2675{
2676 char *p = s;
2677
2678 while ((p = strchr(p, from)) != NULL)
2679 *p++ = to;
2680
2681 return s;
2682}
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08002683
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002684int machines__create_guest_kernel_maps(struct rb_root *machines)
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08002685{
2686 int ret = 0;
2687 struct dirent **namelist = NULL;
2688 int i, items = 0;
2689 char path[PATH_MAX];
2690 pid_t pid;
2691
2692 if (symbol_conf.default_guest_vmlinux_name ||
2693 symbol_conf.default_guest_modules ||
2694 symbol_conf.default_guest_kallsyms) {
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002695 machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID);
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08002696 }
2697
2698 if (symbol_conf.guestmount) {
2699 items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL);
2700 if (items <= 0)
2701 return -ENOENT;
2702 for (i = 0; i < items; i++) {
2703 if (!isdigit(namelist[i]->d_name[0])) {
2704 /* Filter out . and .. */
2705 continue;
2706 }
2707 pid = atoi(namelist[i]->d_name);
2708 sprintf(path, "%s/%s/proc/kallsyms",
2709 symbol_conf.guestmount,
2710 namelist[i]->d_name);
2711 ret = access(path, R_OK);
2712 if (ret) {
2713 pr_debug("Can't access file %s\n", path);
2714 goto failure;
2715 }
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002716 machines__create_kernel_maps(machines, pid);
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08002717 }
2718failure:
2719 free(namelist);
2720 }
2721
2722 return ret;
2723}
Arnaldo Carvalho de Melo5c0541d2010-04-29 15:25:23 -03002724
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002725void machines__destroy_guest_kernel_maps(struct rb_root *machines)
Arnaldo Carvalho de Melo076c6e452010-08-02 18:18:28 -03002726{
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002727 struct rb_node *next = rb_first(machines);
Arnaldo Carvalho de Melo076c6e452010-08-02 18:18:28 -03002728
2729 while (next) {
2730 struct machine *pos = rb_entry(next, struct machine, rb_node);
2731
2732 next = rb_next(&pos->rb_node);
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002733 rb_erase(&pos->rb_node, machines);
Arnaldo Carvalho de Melo076c6e452010-08-02 18:18:28 -03002734 machine__delete(pos);
2735 }
2736}
2737
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002738int machine__load_kallsyms(struct machine *machine, const char *filename,
Arnaldo Carvalho de Melo5c0541d2010-04-29 15:25:23 -03002739 enum map_type type, symbol_filter_t filter)
2740{
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002741 struct map *map = machine->vmlinux_maps[type];
Arnaldo Carvalho de Melo5c0541d2010-04-29 15:25:23 -03002742 int ret = dso__load_kallsyms(map->dso, filename, map, filter);
2743
2744 if (ret > 0) {
2745 dso__set_loaded(map->dso, type);
2746 /*
2747 * Since /proc/kallsyms will have multiple sessions for the
2748 * kernel, with modules between them, fixup the end of all
2749 * sections.
2750 */
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002751 __map_groups__fixup_end(&machine->kmaps, type);
Arnaldo Carvalho de Melo5c0541d2010-04-29 15:25:23 -03002752 }
2753
2754 return ret;
2755}
2756
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002757int machine__load_vmlinux_path(struct machine *machine, enum map_type type,
Arnaldo Carvalho de Melo5c0541d2010-04-29 15:25:23 -03002758 symbol_filter_t filter)
2759{
Arnaldo Carvalho de Meloaeafcba2011-03-31 10:56:28 -03002760 struct map *map = machine->vmlinux_maps[type];
Arnaldo Carvalho de Melo5c0541d2010-04-29 15:25:23 -03002761 int ret = dso__load_vmlinux_path(map->dso, map, filter);
2762
2763 if (ret > 0) {
2764 dso__set_loaded(map->dso, type);
2765 map__reloc_vmlinux(map);
2766 }
2767
2768 return ret;
2769}