| 1 | /* Build symbol tables in GDB's internal format. |
| 2 | Copyright (C) 1986-1996 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 2 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, write to the Free Software |
| 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 19 | |
| 20 | #if !defined (BUILDSYM_H) |
| 21 | #define BUILDSYM_H 1 |
| 22 | |
| 23 | /* This module provides definitions used for creating and adding to |
| 24 | the symbol table. These routines are called from various symbol- |
| 25 | file-reading routines. |
| 26 | |
| 27 | They originated in dbxread.c of gdb-4.2, and were split out to |
| 28 | make xcoffread.c more maintainable by sharing code. |
| 29 | |
| 30 | Variables declared in this file can be defined by #define-ing |
| 31 | the name EXTERN to null. It is used to declare variables that |
| 32 | are normally extern, but which get defined in a single module |
| 33 | using this technique. */ |
| 34 | |
| 35 | #ifndef EXTERN |
| 36 | #define EXTERN extern |
| 37 | #endif |
| 38 | |
| 39 | #define HASHSIZE 127 /* Size of things hashed via hashname() */ |
| 40 | |
| 41 | /* Name of source file whose symbol data we are now processing. |
| 42 | This comes from a symbol of type N_SO. */ |
| 43 | |
| 44 | EXTERN char *last_source_file; |
| 45 | |
| 46 | /* Core address of start of text of current source file. |
| 47 | This too comes from the N_SO symbol. */ |
| 48 | |
| 49 | EXTERN CORE_ADDR last_source_start_addr; |
| 50 | |
| 51 | /* The list of sub-source-files within the current individual compilation. |
| 52 | Each file gets its own symtab with its own linetable and associated info, |
| 53 | but they all share one blockvector. */ |
| 54 | |
| 55 | struct subfile |
| 56 | { |
| 57 | struct subfile *next; |
| 58 | char *name; |
| 59 | char *dirname; |
| 60 | struct linetable *line_vector; |
| 61 | int line_vector_length; |
| 62 | enum language language; |
| 63 | char *debugformat; |
| 64 | }; |
| 65 | |
| 66 | EXTERN struct subfile *subfiles; |
| 67 | |
| 68 | EXTERN struct subfile *current_subfile; |
| 69 | |
| 70 | /* Global variable which, when set, indicates that we are processing a |
| 71 | .o file compiled with gcc */ |
| 72 | |
| 73 | EXTERN unsigned char processing_gcc_compilation; |
| 74 | |
| 75 | /* When set, we are processing a .o file compiled by sun acc. This is |
| 76 | misnamed; it refers to all stabs-in-elf implementations which use |
| 77 | N_UNDF the way Sun does, including Solaris gcc. Hopefully all |
| 78 | stabs-in-elf implementations ever invented will choose to be |
| 79 | compatible. */ |
| 80 | |
| 81 | EXTERN unsigned char processing_acc_compilation; |
| 82 | |
| 83 | /* elz: added this flag to know when a block is compiled with HP |
| 84 | compilers (cc, aCC). This is necessary because of the macro |
| 85 | COERCE_FLOAT_TO_DOUBLE defined in tm_hppa.h, which causes |
| 86 | a coercion of float to double to always occur in parameter passing |
| 87 | for a function called by gdb (see the function value_arg_coerce in |
| 88 | valops.c). This is necessary only if the target |
| 89 | was compiled with gcc, not with HP compilers or with g++ */ |
| 90 | |
| 91 | EXTERN unsigned char processing_hp_compilation; |
| 92 | |
| 93 | /* Count symbols as they are processed, for error messages. */ |
| 94 | |
| 95 | EXTERN unsigned int symnum; |
| 96 | |
| 97 | /* Record the symbols defined for each context in a list. |
| 98 | We don't create a struct block for the context until we |
| 99 | know how long to make it. */ |
| 100 | |
| 101 | #define PENDINGSIZE 100 |
| 102 | |
| 103 | struct pending |
| 104 | { |
| 105 | struct pending *next; |
| 106 | int nsyms; |
| 107 | struct symbol *symbol[PENDINGSIZE]; |
| 108 | }; |
| 109 | |
| 110 | /* Here are the three lists that symbols are put on. */ |
| 111 | |
| 112 | EXTERN struct pending *file_symbols; /* static at top level, and types */ |
| 113 | |
| 114 | EXTERN struct pending *global_symbols; /* global functions and variables */ |
| 115 | |
| 116 | EXTERN struct pending *local_symbols; /* everything local to lexic context */ |
| 117 | |
| 118 | EXTERN struct pending *param_symbols; /* func params local to lexic context */ |
| 119 | |
| 120 | /* Stack representing unclosed lexical contexts |
| 121 | (that will become blocks, eventually). */ |
| 122 | |
| 123 | struct context_stack |
| 124 | { |
| 125 | /* Outer locals at the time we entered */ |
| 126 | |
| 127 | struct pending *locals; |
| 128 | |
| 129 | /* Pending func params at the time we entered */ |
| 130 | |
| 131 | struct pending *params; |
| 132 | |
| 133 | /* Pointer into blocklist as of entry */ |
| 134 | |
| 135 | struct pending_block *old_blocks; |
| 136 | |
| 137 | /* Name of function, if any, defining context*/ |
| 138 | |
| 139 | struct symbol *name; |
| 140 | |
| 141 | /* PC where this context starts */ |
| 142 | |
| 143 | CORE_ADDR start_addr; |
| 144 | |
| 145 | /* Temp slot for exception handling. */ |
| 146 | |
| 147 | CORE_ADDR end_addr; |
| 148 | |
| 149 | /* For error-checking matching push/pop */ |
| 150 | |
| 151 | int depth; |
| 152 | |
| 153 | }; |
| 154 | |
| 155 | EXTERN struct context_stack *context_stack; |
| 156 | |
| 157 | /* Index of first unused entry in context stack. */ |
| 158 | |
| 159 | EXTERN int context_stack_depth; |
| 160 | |
| 161 | /* Currently allocated size of context stack. */ |
| 162 | |
| 163 | EXTERN int context_stack_size; |
| 164 | |
| 165 | /* Macro "function" for popping contexts from the stack. Pushing is done |
| 166 | by a real function, push_context. This returns a pointer to a struct |
| 167 | context_stack. */ |
| 168 | |
| 169 | #define pop_context() (&context_stack[--context_stack_depth]); |
| 170 | |
| 171 | /* Nonzero if within a function (so symbols should be local, |
| 172 | if nothing says specifically). */ |
| 173 | |
| 174 | EXTERN int within_function; |
| 175 | |
| 176 | /* List of blocks already made (lexical contexts already closed). |
| 177 | This is used at the end to make the blockvector. */ |
| 178 | |
| 179 | struct pending_block |
| 180 | { |
| 181 | struct pending_block *next; |
| 182 | struct block *block; |
| 183 | }; |
| 184 | |
| 185 | /* Pointer to the head of a linked list of symbol blocks which have |
| 186 | already been finalized (lexical contexts already closed) and which are |
| 187 | just waiting to be built into a blockvector when finalizing the |
| 188 | associated symtab. */ |
| 189 | |
| 190 | EXTERN struct pending_block *pending_blocks; |
| 191 | |
| 192 | \f |
| 193 | struct subfile_stack |
| 194 | { |
| 195 | struct subfile_stack *next; |
| 196 | char *name; |
| 197 | }; |
| 198 | |
| 199 | EXTERN struct subfile_stack *subfile_stack; |
| 200 | |
| 201 | #define next_symbol_text(objfile) (*next_symbol_text_func)(objfile) |
| 202 | |
| 203 | /* Function to invoke get the next symbol. Return the symbol name. */ |
| 204 | |
| 205 | EXTERN char *(*next_symbol_text_func) PARAMS ((struct objfile *)); |
| 206 | |
| 207 | /* Vector of types defined so far, indexed by their type numbers. |
| 208 | Used for both stabs and coff. |
| 209 | (In newer sun systems, dbx uses a pair of numbers in parens, |
| 210 | as in "(SUBFILENUM,NUMWITHINSUBFILE)". Then these numbers must be |
| 211 | translated through the type_translations hash table to get |
| 212 | the index into the type vector.) */ |
| 213 | |
| 214 | EXTERN struct type **type_vector; |
| 215 | |
| 216 | /* Number of elements allocated for type_vector currently. */ |
| 217 | |
| 218 | EXTERN int type_vector_length; |
| 219 | |
| 220 | /* Initial size of type vector. Is realloc'd larger if needed, |
| 221 | and realloc'd down to the size actually used, when completed. */ |
| 222 | |
| 223 | #define INITIAL_TYPE_VECTOR_LENGTH 160 |
| 224 | |
| 225 | extern void |
| 226 | add_symbol_to_list PARAMS ((struct symbol *, struct pending **)); |
| 227 | |
| 228 | extern struct symbol * |
| 229 | find_symbol_in_list PARAMS ((struct pending *, char *, int)); |
| 230 | |
| 231 | extern void |
| 232 | finish_block PARAMS ((struct symbol *, struct pending **, |
| 233 | struct pending_block *, CORE_ADDR, CORE_ADDR, |
| 234 | struct objfile *)); |
| 235 | |
| 236 | extern void |
| 237 | really_free_pendings PARAMS ((int foo)); |
| 238 | |
| 239 | extern void |
| 240 | start_subfile PARAMS ((char *, char *)); |
| 241 | |
| 242 | extern void |
| 243 | patch_subfile_names PARAMS ((struct subfile *subfile, char *name)); |
| 244 | |
| 245 | extern void |
| 246 | push_subfile PARAMS ((void)); |
| 247 | |
| 248 | extern char * |
| 249 | pop_subfile PARAMS ((void)); |
| 250 | |
| 251 | extern struct symtab * |
| 252 | end_symtab PARAMS ((CORE_ADDR, struct objfile *, int)); |
| 253 | |
| 254 | extern void |
| 255 | scan_file_globals PARAMS ((struct objfile *)); |
| 256 | |
| 257 | extern void |
| 258 | buildsym_new_init PARAMS ((void)); |
| 259 | |
| 260 | extern void |
| 261 | buildsym_init PARAMS ((void)); |
| 262 | |
| 263 | extern struct context_stack * |
| 264 | push_context PARAMS ((int, CORE_ADDR)); |
| 265 | |
| 266 | extern void |
| 267 | record_line PARAMS ((struct subfile *, int, CORE_ADDR)); |
| 268 | |
| 269 | extern void |
| 270 | start_symtab PARAMS ((char *, char *, CORE_ADDR)); |
| 271 | |
| 272 | extern int |
| 273 | hashname PARAMS ((char *)); |
| 274 | |
| 275 | extern void |
| 276 | free_pending_blocks PARAMS ((void)); |
| 277 | |
| 278 | /* FIXME: Note that this is used only in buildsym.c and dstread.c, |
| 279 | which should be fixed to not need direct access to make_blockvector. */ |
| 280 | |
| 281 | extern struct blockvector * |
| 282 | make_blockvector PARAMS ((struct objfile *)); |
| 283 | |
| 284 | /* FIXME: Note that this is used only in buildsym.c and dstread.c, |
| 285 | which should be fixed to not need direct access to record_pending_block. */ |
| 286 | |
| 287 | extern void |
| 288 | record_pending_block PARAMS ((struct objfile *, struct block *, |
| 289 | struct pending_block *)); |
| 290 | |
| 291 | extern void |
| 292 | record_debugformat PARAMS ((char *)); |
| 293 | |
| 294 | extern void |
| 295 | merge_symbol_lists PARAMS ((struct pending **, struct pending **)); |
| 296 | |
| 297 | #undef EXTERN |
| 298 | |
| 299 | #endif /* defined (BUILDSYM_H) */ |