/* libunwind - a platform-independent unwind library
|
Copyright (C) 2003-2005 Hewlett-Packard Co
|
Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
|
|
This file is part of libunwind.
|
|
Permission is hereby granted, free of charge, to any person obtaining
|
a copy of this software and associated documentation files (the
|
"Software"), to deal in the Software without restriction, including
|
without limitation the rights to use, copy, modify, merge, publish,
|
distribute, sublicense, and/or sell copies of the Software, and to
|
permit persons to whom the Software is furnished to do so, subject to
|
the following conditions:
|
|
The above copyright notice and this permission notice shall be
|
included in all copies or substantial portions of the Software.
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
|
|
#include <limits.h>
|
#include <stdio.h>
|
|
#include "libunwind_i.h"
|
#include "libunwind-ptrace.h"
|
#include "map_info.h"
|
#include "os-linux.h"
|
|
/* ANDROID support update. */
|
HIDDEN struct map_info *
|
map_create_list (int map_create_type, pid_t pid)
|
{
|
struct map_iterator mi;
|
unsigned long start, end, offset, flags;
|
struct map_info *map_list = NULL;
|
struct map_info *cur_map;
|
unw_addr_space_t as = NULL;
|
struct unw_addr_space* local_as = NULL;
|
void* as_arg = NULL;
|
|
if (maps_init (&mi, pid) < 0)
|
return NULL;
|
|
while (maps_next (&mi, &start, &end, &offset, &flags))
|
{
|
cur_map = map_alloc_info ();
|
if (cur_map == MAP_FAILED)
|
break;
|
cur_map->next = map_list;
|
cur_map->start = start;
|
cur_map->end = end;
|
cur_map->offset = offset;
|
cur_map->load_base = 0;
|
cur_map->flags = flags;
|
cur_map->path = strdup (mi.path);
|
mutex_init (&cur_map->ei_lock);
|
cur_map->ei.valid = false;
|
cur_map->ei.load_attempted = false;
|
cur_map->ei.mapped = false;
|
cur_map->ei.mini_debug_info_data = NULL;
|
cur_map->ei.mini_debug_info_size = 0;
|
|
/* Indicate mapped memory of devices is special and should not
|
be read or written. Use a special flag instead of zeroing the
|
flags to indicate that the maps do not need to be rebuilt if
|
any values ever wind up in these special maps.
|
/dev/ashmem/... maps are special and don't have any restrictions,
|
so don't mark them as device memory. */
|
if (strncmp ("/dev/", cur_map->path, 5) == 0
|
&& strncmp ("ashmem/", cur_map->path + 5, 7) != 0)
|
cur_map->flags |= MAP_FLAGS_DEVICE_MEM;
|
|
/* If this is a readable executable map, and not a stack map or an
|
empty map, find the load_base. */
|
if (cur_map->path[0] != '\0' && strncmp ("[stack:", cur_map->path, 7) != 0
|
&& strncmp ("[vsyscall]", cur_map->path, 10) != 0
|
&& (flags & (PROT_EXEC | PROT_READ)) == (PROT_EXEC | PROT_READ)
|
&& !(cur_map->flags & MAP_FLAGS_DEVICE_MEM))
|
{
|
struct elf_image ei;
|
// Do not map elf for local unwinds, it's faster to read
|
// from memory directly.
|
if (map_create_type == UNW_MAP_CREATE_REMOTE
|
&& elf_map_image (&ei, cur_map->path))
|
{
|
unw_word_t load_base;
|
if (elf_w (get_load_base) (&ei, offset, &load_base))
|
cur_map->load_base = load_base;
|
munmap (ei.u.mapped.image, ei.u.mapped.size);
|
}
|
else
|
{
|
// Create an address space right here with enough initialized
|
// to read data.
|
if (as == NULL)
|
{
|
if (map_create_type == UNW_MAP_CREATE_LOCAL)
|
{
|
// This is a very large structure, so allocate it.
|
if (local_as == NULL)
|
local_as = (struct unw_addr_space*) malloc(sizeof(*local_as));
|
if (local_as != NULL)
|
{
|
as = local_as;
|
unw_local_access_addr_space_init (as);
|
}
|
}
|
else
|
{
|
// For a remote unwind, create the address space
|
// and arg data the first time we need it.
|
// We'll reuse these values if we need to attempt
|
// to get elf data for another map.
|
as = unw_create_addr_space (&_UPT_accessors, 0);
|
if (as)
|
{
|
as_arg = (void*) _UPT_create (pid);
|
if (!as_arg)
|
{
|
unw_destroy_addr_space (as);
|
as = NULL;
|
}
|
}
|
}
|
}
|
if (as)
|
{
|
ei.mapped = false;
|
ei.u.memory.start = cur_map->start;
|
ei.u.memory.end = cur_map->end;
|
ei.u.memory.as = as;
|
ei.u.memory.as_arg = as_arg;
|
ei.valid = elf_w (valid_object_memory) (&ei);
|
unw_word_t load_base;
|
if (ei.valid && elf_w (get_load_base) (&ei, cur_map->offset, &load_base))
|
cur_map->load_base = load_base;
|
}
|
}
|
}
|
|
map_list = cur_map;
|
}
|
|
maps_close (&mi);
|
|
if (as && map_create_type == UNW_MAP_CREATE_REMOTE)
|
{
|
unw_destroy_addr_space (as);
|
_UPT_destroy (as_arg);
|
}
|
|
free(local_as);
|
|
return map_list;
|
}
|
/* End of ANDROID update. */
|
