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/* Remap file names for debug info for GNU assembler.
Copyright 2007 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
GAS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GAS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GAS; see the file COPYING. If not, write to the Free
Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
02110-1301, USA. */
#include "as.h"
#include "filenames.h"
/* Structure recording the mapping from source file and directory
names at compile time to those to be embedded in debug
information. */
typedef struct debug_prefix_map
{
const char *old_prefix;
const char *new_prefix;
size_t old_len;
size_t new_len;
struct debug_prefix_map *next;
} debug_prefix_map;
/* Linked list of such structures. */
debug_prefix_map *debug_prefix_maps;
/* Record a debug file prefix mapping. ARG is the argument to
-fdebug-prefix-map and must be of the form OLD=NEW. */
void
add_debug_prefix_map (const char *arg)
{
debug_prefix_map *map;
const char *p;
char *o;
p = strchr (arg, '=');
if (!p)
{
as_fatal (_("invalid argument '%s' to -fdebug-prefix-map"), arg);
return;
}
map = (struct debug_prefix_map *) xmalloc (sizeof (debug_prefix_map));
o = xstrdup (arg);
map->old_prefix = o;
map->old_len = p - arg;
o[map->old_len] = 0;
p++;
map->new_prefix = xstrdup (p);
map->new_len = strlen (p);
map->next = debug_prefix_maps;
debug_prefix_maps = map;
}
/* Perform user-specified mapping of debug filename prefixes. Returns
a newly allocated buffer containing the name corresponding to FILENAME.
It is the caller's responsibility to free the buffer. */
const char *
remap_debug_filename (const char *filename)
{
debug_prefix_map *map;
char *s;
const char *name;
size_t name_len;
for (map = debug_prefix_maps; map; map = map->next)
if (filename_ncmp (filename, map->old_prefix, map->old_len) == 0)
break;
if (!map)
return xstrdup (filename);
name = filename + map->old_len;
name_len = strlen (name) + 1;
s = (char *) alloca (name_len + map->new_len);
memcpy (s, map->new_prefix, map->new_len);
memcpy (s + map->new_len, name, name_len);
return xstrdup (s);
}
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