/* libunwind - a platform-independent unwind library
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Copyright (C) 2014 The Android Open Source Project
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This file is part of libunwind.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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#include "libunwind_i.h"
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#include "map_info.h"
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extern int local_get_elf_image (unw_addr_space_t as, struct elf_image *,
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unw_word_t, unsigned long *, unsigned long *,
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char **, void *);
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PROTECTED int
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tdep_get_elf_image (unw_addr_space_t as, struct elf_image *ei,
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pid_t pid, unw_word_t ip,
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unsigned long *segbase, unsigned long *mapoff, char **path,
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void *as_arg)
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{
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struct map_info *map;
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if (pid == getpid())
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return local_get_elf_image (as, ei, ip, segbase, mapoff, path, as_arg);
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map = map_find_from_addr (as->map_list, ip);
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if (!map)
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return -UNW_ENOINFO;
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if (!elf_map_cached_image (as, as_arg, map, ip, false))
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return -UNW_ENOINFO;
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*ei = map->ei;
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*segbase = map->start;
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if (ei->mapped)
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*mapoff = map->offset;
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else
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/* Always use zero as the map offset for in memory maps. The
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* dlopen of a shared library from an APK will result in a
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* non-zero offset so it won't match the elf data and cause
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* unwinds to fail. Currently, only in memory unwinds of an APK
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* are possible, so only modify this path.
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*/
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*mapoff = 0;
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if (path != NULL)
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{
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*path = strdup (map->path);
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}
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return 0;
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}
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