1*fae548d3Szrj /* Remap file names for debug info for GNU assembler.
2*fae548d3Szrj Copyright (C) 2007-2020 Free Software Foundation, Inc.
3*fae548d3Szrj
4*fae548d3Szrj This file is part of GAS, the GNU Assembler.
5*fae548d3Szrj
6*fae548d3Szrj GAS is free software; you can redistribute it and/or modify
7*fae548d3Szrj it under the terms of the GNU General Public License as published by
8*fae548d3Szrj the Free Software Foundation; either version 3, or (at your option)
9*fae548d3Szrj any later version.
10*fae548d3Szrj
11*fae548d3Szrj GAS is distributed in the hope that it will be useful,
12*fae548d3Szrj but WITHOUT ANY WARRANTY; without even the implied warranty of
13*fae548d3Szrj MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14*fae548d3Szrj GNU General Public License for more details.
15*fae548d3Szrj
16*fae548d3Szrj You should have received a copy of the GNU General Public License
17*fae548d3Szrj along with GAS; see the file COPYING. If not, write to the Free
18*fae548d3Szrj Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
19*fae548d3Szrj 02110-1301, USA. */
20*fae548d3Szrj
21*fae548d3Szrj #include "as.h"
22*fae548d3Szrj #include "filenames.h"
23*fae548d3Szrj
24*fae548d3Szrj /* Structure recording the mapping from source file and directory
25*fae548d3Szrj names at compile time to those to be embedded in debug
26*fae548d3Szrj information. */
27*fae548d3Szrj typedef struct debug_prefix_map
28*fae548d3Szrj {
29*fae548d3Szrj const char *old_prefix;
30*fae548d3Szrj const char *new_prefix;
31*fae548d3Szrj size_t old_len;
32*fae548d3Szrj size_t new_len;
33*fae548d3Szrj struct debug_prefix_map *next;
34*fae548d3Szrj } debug_prefix_map;
35*fae548d3Szrj
36*fae548d3Szrj /* Linked list of such structures. */
37*fae548d3Szrj debug_prefix_map *debug_prefix_maps;
38*fae548d3Szrj
39*fae548d3Szrj
40*fae548d3Szrj /* Record a debug file prefix mapping. ARG is the argument to
41*fae548d3Szrj -fdebug-prefix-map and must be of the form OLD=NEW. */
42*fae548d3Szrj
43*fae548d3Szrj void
add_debug_prefix_map(const char * arg)44*fae548d3Szrj add_debug_prefix_map (const char *arg)
45*fae548d3Szrj {
46*fae548d3Szrj debug_prefix_map *map;
47*fae548d3Szrj const char *p;
48*fae548d3Szrj char *o;
49*fae548d3Szrj
50*fae548d3Szrj p = strchr (arg, '=');
51*fae548d3Szrj if (!p)
52*fae548d3Szrj {
53*fae548d3Szrj as_fatal (_("invalid argument '%s' to -fdebug-prefix-map"), arg);
54*fae548d3Szrj return;
55*fae548d3Szrj }
56*fae548d3Szrj map = XNEW (debug_prefix_map);
57*fae548d3Szrj o = xstrdup (arg);
58*fae548d3Szrj map->old_prefix = o;
59*fae548d3Szrj map->old_len = p - arg;
60*fae548d3Szrj o[map->old_len] = 0;
61*fae548d3Szrj p++;
62*fae548d3Szrj map->new_prefix = xstrdup (p);
63*fae548d3Szrj map->new_len = strlen (p);
64*fae548d3Szrj map->next = debug_prefix_maps;
65*fae548d3Szrj debug_prefix_maps = map;
66*fae548d3Szrj }
67*fae548d3Szrj
68*fae548d3Szrj /* Perform user-specified mapping of debug filename prefixes. Returns
69*fae548d3Szrj a newly allocated buffer containing the name corresponding to FILENAME.
70*fae548d3Szrj It is the caller's responsibility to free the buffer. */
71*fae548d3Szrj
72*fae548d3Szrj const char *
remap_debug_filename(const char * filename)73*fae548d3Szrj remap_debug_filename (const char *filename)
74*fae548d3Szrj {
75*fae548d3Szrj debug_prefix_map *map;
76*fae548d3Szrj
77*fae548d3Szrj for (map = debug_prefix_maps; map; map = map->next)
78*fae548d3Szrj if (filename_ncmp (filename, map->old_prefix, map->old_len) == 0)
79*fae548d3Szrj {
80*fae548d3Szrj const char *name = filename + map->old_len;
81*fae548d3Szrj return concat (map->new_prefix, name, NULL);
82*fae548d3Szrj }
83*fae548d3Szrj
84*fae548d3Szrj return xstrdup (filename);
85*fae548d3Szrj }
86