lto-plugin/lto-plugin.h

   1 /* Common declarations for LTO plugin for gold and/or GNU ld.
   2    Copyright (C) 2009, 2010 Free Software Foundation, Inc.
   3    Contributed by Rafael Avila de Espindola (espindola@google.com).
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 3, or (at your option)
   8 any later version.
   9
  10 This program is distributed in the hope that it will be useful, but
  11 WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; see the file COPYING3.  If not see
  17 <http://www.gnu.org/licenses/>.  */
  18
  19 #include <stdbool.h>
  20 #include "plugin-api.h"
  21
  22 /* LTO magic section name.  */
  23
  24 #define LTO_SECTION_PREFIX ".gnu.lto_.symtab"
  25
  26 /* The part of the symbol table the plugin has to keep track of. Note that we
  27    must keep SYMS until all_symbols_read is called to give the linker time to
  28    copy the symbol information. */
  29
  30 struct sym_aux
  31 {
  32   uint32_t slot;
  33   unsigned id;
  34   unsigned next_conflict;
  35 };
  36
  37 struct plugin_symtab
  38 {
  39   int nsyms;
  40   struct sym_aux *aux;
  41   struct ld_plugin_symbol *syms;
  42   unsigned id;
  43 };
  44
  45 /* All that we have to remember about a file. */
  46
  47 struct plugin_file_info
  48 {
  49   char *name;
  50   void *handle;
  51   struct plugin_symtab symtab;
  52   struct plugin_symtab conflicts;
  53 };
  54
  55 /* These are the methods supplied by one of the object format
  56    dependent files lto-plugin-elf.c or lto-plugin-coff.c  */
  57
  58 extern enum ld_plugin_status claim_file_handler
  59                 (const struct ld_plugin_input_file *file, int *claimed);
  60
  61 extern enum ld_plugin_status onload_format_checks (struct ld_plugin_tv *tv);
  62
  63 /* These methods are made available to the object format
  64    dependent files.  */
  65
  66 extern void check (bool gate, enum ld_plugin_level level, const char *text);
  67
  68 extern void translate (char *data, char *end, struct plugin_symtab *out);
  69
  70 extern char *parse_table_entry (char *p, struct ld_plugin_symbol *entry,
  71                         struct sym_aux *aux);
  72
  73 extern void resolve_conflicts (struct plugin_symtab *t,
  74                         struct plugin_symtab *conflicts);
  75
  76 /* And this callback function is exposed.  */
  77
  78 extern ld_plugin_add_symbols add_symbols;
  79
  80 /* Along with these two variables.  */
  81
  82 extern struct plugin_file_info *claimed_files;
  83 extern unsigned int num_claimed_files;
  84