gdb/stabsread.h

   1 /* Include file for stabs debugging format support functions.
   2    Copyright (C) 1986-2018 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program 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 of the License, or
   9    (at your option) any later version.
  10
  11    This program 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.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 struct objfile;
  20 enum language;
  21
  22 /* Definitions, prototypes, etc for stabs debugging format support
  23    functions.
  24
  25    Variables declared in this file can be defined by #define-ing
  26    the name EXTERN to null.  It is used to declare variables that
  27    are normally extern, but which get defined in a single module
  28    using this technique.  */
  29
  30 #ifndef EXTERN
  31 #define EXTERN extern
  32 #endif
  33
  34 #define HASHSIZE 127            /* Size of things hashed via
  35                                    hashname().  */
  36
  37 /* Compute a small integer hash code for the given name.  */
  38
  39 extern int hashname (const char *name);
  40
  41 /* Count symbols as they are processed, for error messages.  */
  42
  43 EXTERN unsigned int symnum;
  44
  45 #define next_symbol_text(objfile) (*next_symbol_text_func)(objfile)
  46
  47 /* Function to invoke get the next symbol.  Return the symbol name.  */
  48
  49 EXTERN const char *(*next_symbol_text_func) (struct objfile *);
  50
  51 /* Global variable which, when set, indicates that we are processing a
  52    .o file compiled with gcc */
  53
  54 EXTERN unsigned char processing_gcc_compilation;
  55
  56 /* Hash table of global symbols whose values are not known yet.
  57    They are chained thru the SYMBOL_VALUE_CHAIN, since we don't
  58    have the correct data for that slot yet.
  59
  60    The use of the LOC_BLOCK code in this chain is nonstandard--
  61    it refers to a FORTRAN common block rather than the usual meaning, and
  62    the such LOC_BLOCK symbols use their fields in nonstandard ways.  */
  63
  64 EXTERN struct symbol *global_sym_chain[HASHSIZE];
  65
  66 extern void common_block_start (const char *, struct objfile *);
  67 extern void common_block_end (struct objfile *);
  68
  69 /* Kludge for xcoffread.c */
  70
  71 struct pending_stabs
  72   {
  73     int count;
  74     int length;
  75     char *stab[1];
  76   };
  77
  78 EXTERN struct pending_stabs *global_stabs;
  79
  80 /* The type code that process_one_symbol saw on its previous invocation.
  81    Used to detect pairs of N_SO symbols.  */
  82
  83 EXTERN int previous_stab_code;
  84 \f
  85 /* Support for Sun changes to dbx symbol format.  */
  86
  87 /* For each identified header file, we have a table of types defined
  88    in that header file.
  89
  90    header_files maps header file names to their type tables.
  91    It is a vector of n_header_files elements.
  92    Each element describes one header file.
  93    It contains a vector of types.
  94
  95    Sometimes it can happen that the same header file produces
  96    different results when included in different places.
  97    This can result from conditionals or from different
  98    things done before including the file.
  99    When this happens, there are multiple entries for the file in this table,
 100    one entry for each distinct set of results.
 101    The entries are distinguished by the INSTANCE field.
 102    The INSTANCE field appears in the N_BINCL and N_EXCL symbol table and is
 103    used to match header-file references to their corresponding data.  */
 104
 105 struct header_file
 106   {
 107
 108     /* Name of header file */
 109
 110     char *name;
 111
 112     /* Numeric code distinguishing instances of one header file that
 113        produced different results when included.  It comes from the
 114        N_BINCL or N_EXCL.  */
 115
 116     int instance;
 117
 118     /* Pointer to vector of types */
 119
 120     struct type **vector;
 121
 122     /* Allocated length (# elts) of that vector */
 123
 124     int length;
 125
 126   };
 127
 128 /* The table of header_files of this OBJFILE.  */
 129 #define HEADER_FILES(OBJFILE) (DBX_SYMFILE_INFO (OBJFILE)->header_files)
 130
 131 /* The actual length of HEADER_FILES.  */
 132 #define N_HEADER_FILES(OBJFILE) (DBX_SYMFILE_INFO (OBJFILE)->n_header_files)
 133
 134 /* The allocated lengh of HEADER_FILES.  */
 135 #define N_ALLOCATED_HEADER_FILES(OBJFILE) \
 136   (DBX_SYMFILE_INFO (OBJFILE)->n_allocated_header_files)
 137
 138 /* Within each object file, various header files are assigned numbers.
 139    A type is defined or referred to with a pair of numbers
 140    (FILENUM,TYPENUM) where FILENUM is the number of the header file
 141    and TYPENUM is the number within that header file.
 142    TYPENUM is the index within the vector of types for that header file.
 143
 144    FILENUM == 0 is special; it refers to the main source of the object file,
 145    and not to any header file.  FILENUM != 1 is interpreted by looking it up
 146    in the following table, which contains indices in header_files.  */
 147
 148 EXTERN int *this_object_header_files;
 149
 150 EXTERN int n_this_object_header_files;
 151
 152 EXTERN int n_allocated_this_object_header_files;
 153
 154 extern void cleanup_undefined_stabs_types (struct objfile *);
 155
 156 extern long read_number (char **, int);
 157
 158 extern struct symbol *define_symbol (CORE_ADDR, const char *, int, int,
 159                                      struct objfile *);
 160
 161 extern void stabsread_init (void);
 162
 163 extern void stabsread_new_init (void);
 164
 165 extern void start_stabs (void);
 166
 167 extern void end_stabs (void);
 168
 169 extern void finish_global_stabs (struct objfile *objfile);
 170 \f
 171 /* COFF files can have multiple .stab sections, if they are linked
 172    using --split-by-reloc.  This linked list is used to pass the
 173    information into the functions in dbxread.c.  */
 174 struct stab_section_list
 175   {
 176     /* Next in list.  */
 177     struct stab_section_list *next;
 178
 179     /* Stab section.  */
 180     asection *section;
 181   };
 182 \f
 183 /* Functions exported by dbxread.c.  These are not in stabsread.c because
 184    they are only used by some stabs readers.  */
 185
 186 extern struct partial_symtab *dbx_end_psymtab
 187   (struct objfile *objfile, struct partial_symtab *pst,
 188    const char **include_list, int num_includes,
 189    int capping_symbol_offset, CORE_ADDR capping_text,
 190    struct partial_symtab **dependency_list, int number_dependencies,
 191    int textlow_not_set);
 192
 193 extern void process_one_symbol (int, int, CORE_ADDR, const char *,
 194                                 const struct section_offsets *,
 195                                 struct objfile *, enum language);
 196
 197 extern void elfstab_build_psymtabs (struct objfile *objfile,
 198                                     asection *stabsect,
 199                                     file_ptr stabstroffset,
 200                                     unsigned int stabstrsize);
 201
 202 extern void coffstab_build_psymtabs
 203   (struct objfile *objfile,
 204    CORE_ADDR textaddr, unsigned int textsize,
 205    struct stab_section_list *stabs,
 206    file_ptr stabstroffset, unsigned int stabstrsize);
 207
 208 extern void stabsect_build_psymtabs (struct objfile *objfile, char *stab_name,
 209                                      char *stabstr_name, char *text_name);
 210
 211 extern int symbol_reference_defined (const char **);
 212
 213 extern void ref_add (int, struct symbol *, const char *, CORE_ADDR);
 214
 215 extern struct symbol *ref_search (int);
 216
 217 extern void free_header_files (void);
 218
 219 extern void init_header_files (void);
 220
 221 #undef EXTERN