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[binutils-gdb.git] / gas / remap.c
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1 /* Remap file names for debug info for GNU assembler.
2 Copyright (C) 2007-2022 Free Software Foundation, Inc.
4 This file is part of GAS, the GNU Assembler.
6 GAS is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3, or (at your option)
9 any later version.
11 GAS is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GAS; see the file COPYING. If not, write to the Free
18 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
19 02110-1301, USA. */
21 #include "as.h"
22 #include "filenames.h"
24 /* Structure recording the mapping from source file and directory
25 names at compile time to those to be embedded in debug
26 information. */
27 typedef struct debug_prefix_map
29 const char *old_prefix;
30 const char *new_prefix;
31 size_t old_len;
32 size_t new_len;
33 struct debug_prefix_map *next;
34 } debug_prefix_map;
36 /* Linked list of such structures. */
37 debug_prefix_map *debug_prefix_maps;
40 /* Record a debug file prefix mapping. ARG is the argument to
41 -fdebug-prefix-map and must be of the form OLD=NEW. */
43 void
44 add_debug_prefix_map (const char *arg)
46 debug_prefix_map *map;
47 const char *p;
48 char *o;
50 p = strchr (arg, '=');
51 if (!p)
53 as_fatal (_("invalid argument '%s' to -fdebug-prefix-map"), arg);
54 return;
56 map = XNEW (debug_prefix_map);
57 o = xstrdup (arg);
58 map->old_prefix = o;
59 map->old_len = p - arg;
60 o[map->old_len] = 0;
61 p++;
62 map->new_prefix = xstrdup (p);
63 map->new_len = strlen (p);
64 map->next = debug_prefix_maps;
65 debug_prefix_maps = map;
68 /* Perform user-specified mapping of debug filename prefixes. Returns
69 a newly allocated buffer containing the name corresponding to FILENAME.
70 It is the caller's responsibility to free the buffer. */
72 const char *
73 remap_debug_filename (const char *filename)
75 debug_prefix_map *map;
77 for (map = debug_prefix_maps; map; map = map->next)
78 if (filename_ncmp (filename, map->old_prefix, map->old_len) == 0)
80 const char *name = filename + map->old_len;
81 return concat (map->new_prefix, name, NULL);
84 return xstrdup (filename);