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 }; 64 65 EXTERN struct subfile *subfiles; 66 67 EXTERN struct subfile *current_subfile; 68 69 /* Global variable which, when set, indicates that we are processing a 70 .o file compiled with gcc */ 71 72 EXTERN unsigned char processing_gcc_compilation; 73 74 /* When set, we are processing a .o file compiled by sun acc. This is 75 misnamed; it refers to all stabs-in-elf implementations which use 76 N_UNDF the way Sun does, including Solaris gcc. Hopefully all 77 stabs-in-elf implementations ever invented will choose to be 78 compatible. */ 79 80 EXTERN unsigned char processing_acc_compilation; 81 82 /* Count symbols as they are processed, for error messages. */ 83 84 EXTERN unsigned int symnum; 85 86 /* Record the symbols defined for each context in a list. 87 We don't create a struct block for the context until we 88 know how long to make it. */ 89 90 #define PENDINGSIZE 100 91 92 struct pending 93 { 94 struct pending *next; 95 int nsyms; 96 struct symbol *symbol[PENDINGSIZE]; 97 }; 98 99 /* Here are the three lists that symbols are put on. */ 100 101 EXTERN struct pending *file_symbols; /* static at top level, and types */ 102 103 EXTERN struct pending *global_symbols; /* global functions and variables */ 104 105 EXTERN struct pending *local_symbols; /* everything local to lexic context */ 106 107 /* Stack representing unclosed lexical contexts 108 (that will become blocks, eventually). */ 109 110 struct context_stack 111 { 112 /* Outer locals at the time we entered */ 113 114 struct pending *locals; 115 116 /* Pointer into blocklist as of entry */ 117 118 struct pending_block *old_blocks; 119 120 /* Name of function, if any, defining context*/ 121 122 struct symbol *name; 123 124 /* PC where this context starts */ 125 126 CORE_ADDR start_addr; 127 128 /* Temp slot for exception handling. */ 129 130 CORE_ADDR end_addr; 131 132 /* For error-checking matching push/pop */ 133 134 int depth; 135 136 }; 137 138 EXTERN struct context_stack *context_stack; 139 140 /* Index of first unused entry in context stack. */ 141 142 EXTERN int context_stack_depth; 143 144 /* Currently allocated size of context stack. */ 145 146 EXTERN int context_stack_size; 147 148 /* Macro "function" for popping contexts from the stack. Pushing is done 149 by a real function, push_context. This returns a pointer to a struct 150 context_stack. */ 151 152 #define pop_context() (&context_stack[--context_stack_depth]); 153 154 /* Nonzero if within a function (so symbols should be local, 155 if nothing says specifically). */ 156 157 EXTERN int within_function; 158 159 /* List of blocks already made (lexical contexts already closed). 160 This is used at the end to make the blockvector. */ 161 162 struct pending_block 163 { 164 struct pending_block *next; 165 struct block *block; 166 }; 167 168 169 struct subfile_stack 170 { 171 struct subfile_stack *next; 172 char *name; 173 }; 174 175 EXTERN struct subfile_stack *subfile_stack; 176 177 #define next_symbol_text(objfile) (*next_symbol_text_func)(objfile) 178 179 /* Function to invoke get the next symbol. Return the symbol name. */ 180 181 EXTERN char *(*next_symbol_text_func) PARAMS ((struct objfile *)); 182 183 /* Vector of types defined so far, indexed by their type numbers. 184 Used for both stabs and coff. 185 (In newer sun systems, dbx uses a pair of numbers in parens, 186 as in "(SUBFILENUM,NUMWITHINSUBFILE)". Then these numbers must be 187 translated through the type_translations hash table to get 188 the index into the type vector.) */ 189 190 EXTERN struct type **type_vector; 191 192 /* Number of elements allocated for type_vector currently. */ 193 194 EXTERN int type_vector_length; 195 196 /* Initial size of type vector. Is realloc'd larger if needed, 197 and realloc'd down to the size actually used, when completed. */ 198 199 #define INITIAL_TYPE_VECTOR_LENGTH 160 200 201 extern void 202 add_symbol_to_list PARAMS ((struct symbol *, struct pending **)); 203 204 extern struct symbol * 205 find_symbol_in_list PARAMS ((struct pending *, char *, int)); 206 207 extern void 208 finish_block PARAMS ((struct symbol *, struct pending **, 209 struct pending_block *, CORE_ADDR, CORE_ADDR, 210 struct objfile *)); 211 212 extern void 213 really_free_pendings PARAMS ((int foo)); 214 215 extern void 216 start_subfile PARAMS ((char *, char *)); 217 218 extern void 219 patch_subfile_names PARAMS ((struct subfile *subfile, char *name)); 220 221 extern void 222 push_subfile PARAMS ((void)); 223 224 extern char * 225 pop_subfile PARAMS ((void)); 226 227 extern struct symtab * 228 end_symtab PARAMS ((CORE_ADDR, struct objfile *, int)); 229 230 extern void 231 scan_file_globals PARAMS ((struct objfile *)); 232 233 extern void 234 buildsym_new_init PARAMS ((void)); 235 236 extern void 237 buildsym_init PARAMS ((void)); 238 239 extern struct context_stack * 240 push_context PARAMS ((int, CORE_ADDR)); 241 242 extern void 243 record_line PARAMS ((struct subfile *, int, CORE_ADDR)); 244 245 extern void 246 start_symtab PARAMS ((char *, char *, CORE_ADDR)); 247 248 extern int 249 hashname PARAMS ((char *)); 250 251 extern void 252 free_pending_blocks PARAMS ((void)); 253 254 /* FIXME: Note that this is used only in buildsym.c and dstread.c, 255 which should be fixed to not need direct access to make_blockvector. */ 256 257 extern struct blockvector * 258 make_blockvector PARAMS ((struct objfile *)); 259 260 /* FIXME: Note that this is used only in buildsym.c and dstread.c, 261 which should be fixed to not need direct access to record_pending_block. */ 262 263 extern void 264 record_pending_block PARAMS ((struct objfile *, struct block *, 265 struct pending_block *)); 266 267 #undef EXTERN 268 269 #endif /* defined (BUILDSYM_H) */ 270