1 /* Remap file names for debug info for GNU assembler.
2 Copyright (C) 2007-2015 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)
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
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
27 typedef struct debug_prefix_map
29 const char *old_prefix
;
30 const char *new_prefix
;
33 struct debug_prefix_map
*next
;
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. */
44 add_debug_prefix_map (const char *arg
)
46 debug_prefix_map
*map
;
50 p
= strchr (arg
, '=');
53 as_fatal (_("invalid argument '%s' to -fdebug-prefix-map"), arg
);
56 map
= (struct debug_prefix_map
*) xmalloc (sizeof (debug_prefix_map
));
59 map
->old_len
= p
- arg
;
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. */
73 remap_debug_filename (const char *filename
)
75 debug_prefix_map
*map
;
80 for (map
= debug_prefix_maps
; map
; map
= map
->next
)
81 if (filename_ncmp (filename
, map
->old_prefix
, map
->old_len
) == 0)
84 return xstrdup (filename
);
85 name
= filename
+ map
->old_len
;
86 name_len
= strlen (name
) + 1;
87 s
= (char *) alloca (name_len
+ map
->new_len
);
88 memcpy (s
, map
->new_prefix
, map
->new_len
);
89 memcpy (s
+ map
->new_len
, name
, name_len
);
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