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authorJoseph Myers <joseph@codesourcery.com>2007-08-24 21:49:55 +0000
committerJoseph Myers <joseph@codesourcery.com>2007-08-24 21:49:55 +0000
commit3d6b762c68c6e19bdf387c0f1db7773fd22aab9a (patch)
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parent534a31f6908dfec77b02051240630059e3ad7520 (diff)
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2007-08-24 Joseph Myers <joseph@codesourcery.com>
Paul Brook <paul@codesourcery.com> * remap.c: New. * as.h (remap_debug_filename, add_debug_prefix_map): Declare. * as.c (show_usage): Document --debug-prefix-map option. (parse_args): Handle --debug-prefix-map. * dwarf2dbg.c (out_file_list, out_debug_info): Remap debug paths. * stabs.c (stabs_generate_asm_file): Remap debug paths. * Makefile.am (GAS_CFILES): Add remap.c (GENERIC_OBJS): Add remap.o. Regenerate dependencies. * Makefile.in: Regenerate. * doc/as.texinfo (--debug-prefix-map): Document.
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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"
+
+/* 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 = 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. Return
+ the new name corresponding to FILENAME. */
+
+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 (strncmp (filename, map->old_prefix, map->old_len) == 0)
+ break;
+ if (!map)
+ return 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);
+}