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92 lines
2.6 KiB
C
92 lines
2.6 KiB
C
/* Remap file names for debug info for GNU assembler.
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Copyright (C) 2007-2014 Free Software Foundation, Inc.
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This file is part of GAS, the GNU Assembler.
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GAS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GAS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GAS; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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#include "as.h"
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#include "filenames.h"
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/* Structure recording the mapping from source file and directory
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names at compile time to those to be embedded in debug
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information. */
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typedef struct debug_prefix_map
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{
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const char *old_prefix;
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const char *new_prefix;
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size_t old_len;
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size_t new_len;
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struct debug_prefix_map *next;
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} debug_prefix_map;
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/* Linked list of such structures. */
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debug_prefix_map *debug_prefix_maps;
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/* Record a debug file prefix mapping. ARG is the argument to
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-fdebug-prefix-map and must be of the form OLD=NEW. */
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void
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add_debug_prefix_map (const char *arg)
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{
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debug_prefix_map *map;
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const char *p;
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char *o;
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p = strchr (arg, '=');
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if (!p)
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{
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as_fatal (_("invalid argument '%s' to -fdebug-prefix-map"), arg);
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return;
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}
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map = (struct debug_prefix_map *) xmalloc (sizeof (debug_prefix_map));
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o = xstrdup (arg);
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map->old_prefix = o;
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map->old_len = p - arg;
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o[map->old_len] = 0;
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p++;
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map->new_prefix = xstrdup (p);
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map->new_len = strlen (p);
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map->next = debug_prefix_maps;
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debug_prefix_maps = map;
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}
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/* Perform user-specified mapping of debug filename prefixes. Returns
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a newly allocated buffer containing the name corresponding to FILENAME.
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It is the caller's responsibility to free the buffer. */
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const char *
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remap_debug_filename (const char *filename)
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{
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debug_prefix_map *map;
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char *s;
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const char *name;
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size_t name_len;
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for (map = debug_prefix_maps; map; map = map->next)
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if (filename_ncmp (filename, map->old_prefix, map->old_len) == 0)
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break;
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if (!map)
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return xstrdup (filename);
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name = filename + map->old_len;
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name_len = strlen (name) + 1;
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s = (char *) alloca (name_len + map->new_len);
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memcpy (s, map->new_prefix, map->new_len);
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memcpy (s + map->new_len, name, name_len);
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return xstrdup (s);
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}
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