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
5This file is part of libunwind.
6
7Permission is hereby granted, free of charge, to any person obtaining
8a copy of this software and associated documentation files (the
9"Software"), to deal in the Software without restriction, including
10without limitation the rights to use, copy, modify, merge, publish,
11distribute, sublicense, and/or sell copies of the Software, and to
12permit persons to whom the Software is furnished to do so, subject to
13the following conditions:
14
15The above copyright notice and this permission notice shall be
16included in all copies or substantial portions of the Software.
17
18THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
22LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24WITH 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. */
35extern struct map_info *local_map_list;
36HIDDEN define_lock(os_map_lock);
37
38HIDDEN struct map_info *
39maps_create_list (pid_t pid)
40{
41  return NULL;
42}
43
44PROTECTED int
45tdep_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    }
116release_lock:
117  lock_release (&os_map_lock, saved_mask);
118
119finish:
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
133PROTECTED int
134maps_is_local_readable(struct map_info *map_list, unw_word_t addr)
135{
136  return 1;
137}
138
139PROTECTED int
140maps_is_local_writable(struct map_info *map_list, unw_word_t addr)
141{
142  return 1;
143}
144/* End of ANDROID update. */
145