1 /* libunwind - a platform-independent unwind library
2 Copyright (C) 2003-2005 Hewlett-Packard Co
3 Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
4
5 This file is part of libunwind.
6
7 Permission is hereby granted, free of charge, to any person obtaining
8 a copy of this software and associated documentation files (the
9 "Software"), to deal in the Software without restriction, including
10 without limitation the rights to use, copy, modify, merge, publish,
11 distribute, sublicense, and/or sell copies of the Software, and to
12 permit persons to whom the Software is furnished to do so, subject to
13 the following conditions:
14
15 The above copyright notice and this permission notice shall be
16 included in all copies or substantial portions of the Software.
17
18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
22 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
25
26 #include <dlfcn.h>
27 #include <string.h>
28 #include <unistd.h>
29
30 #include "libunwind_i.h"
31
32 #include "elf64.h"
33
34 /* ANDROID support update. */
35 extern struct map_info *local_map_list;
36 HIDDEN define_lock(os_map_lock);
37
38 HIDDEN struct map_info *
maps_create_list(pid_t pid)39 maps_create_list (pid_t pid)
40 {
41 return NULL;
42 }
43
44 PROTECTED int
tdep_get_elf_image(unw_addr_space_t as,struct elf_image ** ei,pid_t pid,unw_word_t ip,unsigned long * segbase,unsigned long * mapoff,char ** path)45 tdep_get_elf_image (unw_addr_space_t as, struct elf_image **ei,
46 pid_t pid, unw_word_t ip,
47 unsigned long *segbase, unsigned long *mapoff, char **path)
48 {
49 struct load_module_desc lmd;
50 const char *path;
51
52 if (pid != getpid ())
53 {
54 printf ("%s: remote case not implemented yet\n", __FUNCTION__);
55 return -UNW_ENOINFO;
56 }
57
58 /* First check to see if this ip is in our cache. */
59 map = map_find_from_addr(as->map_list, ip);
60 if (map)
61 goto finish;
62
63 /* Lock while we update the list. */
64 lock_acquire (&os_map_lock, saved_mask);
65
66 /* Check again if ip is in the map. */
67 map = map_find_from_addr(as->map_list, ip);
68 if (map)
69 goto release_lock;
70
71 /* Not in the cache, try and find the data. */
72 if (!dlmodinfo (ip, &lmd, sizeof (lmd), NULL, 0, 0))
73 goto release_lock;
74
75 path = dlgetname (&lmd, sizeof (lmd), NULL, 0, 0);
76 if (!path)
77 goto release_lock;
78
79 map = mempool_alloc (&map_pool);
80 if (!map)
81 goto release_lock;
82
83 map->start = lmd.text_base;
84 map->end = cur_map->start + lmd.text_size;
85 map->offset = 0; /* XXX fix me? */
86 map->flags = ;
87 map->path = strdup(path2);
88 mutex_init (&cur_map->ei_lock);
89 map->ei.size = 0;
90 map->ei.image = NULL;
91 map->ei_shared = 0;
92 Debug(1, "segbase=%lx, mapoff=%lx, path=%s\n", map->start, map->offset, map->path);
93
94 if (elf_map_cached_image (map, ip) < 0)
95 {
96 free(map);
97 map = NULL;
98 }
99 else
100 {
101 /* Add this element into list in descending order by start. */
102 struct map_info *map_list = as->map_list;
103 if (as->map_list == NULL || map->start > as->map_list->start)
104 {
105 map->next = as->map_list;
106 as->map_list = map;
107 }
108 else
109 {
110 while (map_list->next != NULL && map->start <= map_list->next->start)
111 map_list = map_list->next;
112 map->next = map_list->next;
113 map_list->next = map;
114 }
115 }
116 release_lock:
117 lock_release (&os_map_lock, saved_mask);
118
119 finish:
120 if (map)
121 {
122 *ei = &map->ei;
123 *segbase = map->start;
124 *mapoff = map->offset;
125 if (path != NULL)
126 {
127 *path = strdup (map->path);
128 }
129 }
130 return 0;
131 }
132
133 PROTECTED int
maps_is_local_readable(struct map_info * map_list,unw_word_t addr)134 maps_is_local_readable(struct map_info *map_list, unw_word_t addr)
135 {
136 return 1;
137 }
138
139 PROTECTED int
maps_is_local_writable(struct map_info * map_list,unw_word_t addr)140 maps_is_local_writable(struct map_info *map_list, unw_word_t addr)
141 {
142 return 1;
143 }
144 /* End of ANDROID update. */
145