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- /* Build symbol tables in GDB's internal format.
- Copyright (C) 1986-1991 Free Software Foundation, Inc.
-
- This file is part of GDB.
-
- This program 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 2 of the License, or
- (at your option) any later version.
-
- This program 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 this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #if !defined (BUILDSYM_H)
- #define BUILDSYM_H 1
-
- /* This module provides definitions used for creating and adding to
- the symbol table. These routines are called from various symbol-
- file-reading routines.
-
- They originated in dbxread.c of gdb-4.2, and were split out to
- make xcoffread.c more maintainable by sharing code.
-
- Variables declared in this file can be defined by #define-ing
- the name EXTERN to null. It is used to declare variables that
- are normally extern, but which get defined in a single module
- using this technique. */
-
- #ifndef EXTERN
- #define EXTERN extern
- #endif
-
- /* Convert stab register number (from `r' declaration) to a gdb REGNUM. */
-
- #ifndef STAB_REG_TO_REGNUM
- #define STAB_REG_TO_REGNUM(VALUE) (VALUE)
- #endif
-
- /* Name of source file whose symbol data we are now processing.
- This comes from a symbol of type N_SO. */
-
- EXTERN char *last_source_file;
-
- /* Core address of start of text of current source file.
- This too comes from the N_SO symbol. */
-
- EXTERN CORE_ADDR last_source_start_addr;
-
- /* The list of sub-source-files within the current individual compilation.
- Each file gets its own symtab with its own linetable and associated info,
- but they all share one blockvector. */
-
- struct subfile
- {
- struct subfile *next;
- char *name;
- char *dirname;
- struct linetable *line_vector;
- int line_vector_length;
- };
-
- EXTERN struct subfile *subfiles;
-
- EXTERN struct subfile *current_subfile;
-
- /* Global variable which, when set, indicates that we are processing a
- .o file compiled with gcc */
-
- EXTERN unsigned char processing_gcc_compilation;
-
- /* Count symbols as they are processed, for error messages. */
-
- EXTERN unsigned int symnum;
-
- /* Vector of types defined so far, indexed by their dbx type numbers.
- (In newer sun systems, dbx uses a pair of numbers in parens,
- as in "(SUBFILENUM,NUMWITHINSUBFILE)". Then these numbers must be
- translated through the type_translations hash table to get
- the index into the type vector.) */
-
- EXTERN struct type **type_vector;
-
- /* Number of elements allocated for type_vector currently. */
-
- EXTERN int type_vector_length;
-
- /* Hash table of global symbols whose values are not known yet.
- They are chained thru the SYMBOL_VALUE_CHAIN, since we don't
- have the correct data for that slot yet. */
- /* The use of the LOC_BLOCK code in this chain is nonstandard--
- it refers to a FORTRAN common block rather than the usual meaning. */
-
- #define HASHSIZE 127
- EXTERN struct symbol *global_sym_chain[HASHSIZE];
-
- /* Record the symbols defined for each context in a list.
- We don't create a struct block for the context until we
- know how long to make it. */
-
- #define PENDINGSIZE 100
-
- struct pending
- {
- struct pending *next;
- int nsyms;
- struct symbol *symbol[PENDINGSIZE];
- };
-
- /* List of free `struct pending' structures for reuse. */
- EXTERN struct pending *free_pendings;
-
- /* Here are the three lists that symbols are put on. */
-
- EXTERN struct pending *file_symbols; /* static at top level, and types */
-
- EXTERN struct pending *global_symbols; /* global functions and variables */
-
- EXTERN struct pending *local_symbols; /* everything local to lexic context */
-
- /* Kludge for xcoffread.c */
- struct pending_stabs {
- int count, length;
- char *stab[1];
- };
-
- EXTERN struct pending_stabs *global_stabs;
-
- /* List of symbols declared since the last BCOMM. This list is a tail
- of local_symbols. When ECOMM is seen, the symbols on the list
- are noted so their proper addresses can be filled in later,
- using the common block base address gotten from the assembler
- stabs. */
-
- EXTERN struct pending *common_block;
- EXTERN int common_block_i;
-
- /* Stack representing unclosed lexical contexts
- (that will become blocks, eventually). */
-
- struct context_stack
- {
- struct pending *locals; /* Outer locals at the time we entered */
- struct pending_block *old_blocks; /* Pointer into blocklist as of entry */
- struct symbol *name; /* Name of function, if any, defining context*/
- CORE_ADDR start_addr; /* PC where this context starts */
- CORE_ADDR end_addr; /* Temp slot for exception handling. */
- int depth; /* For error-checking matching push/pop */
- };
-
- EXTERN struct context_stack *context_stack;
-
- /* Index of first unused entry in context stack. */
- EXTERN int context_stack_depth;
-
- /* Currently allocated size of context stack. */
-
- EXTERN int context_stack_size;
-
- /* Macro "function" for popping contexts from the stack. Pushing is done
- by a real function, push_context. This returns a pointer to a struct
- context_stack. */
-
- #define pop_context() \
- (&context_stack[--context_stack_depth]);
-
- /* Nonzero if within a function (so symbols should be local,
- if nothing says specifically). */
-
- EXTERN int within_function;
-
- /* List of blocks already made (lexical contexts already closed).
- This is used at the end to make the blockvector. */
-
- struct pending_block
- {
- struct pending_block *next;
- struct block *block;
- };
-
- EXTERN struct pending_block *pending_blocks;
-
- /* Global variable which, when set, indicates that we are processing a
- .o file compiled with gcc */
-
- EXTERN unsigned char processing_gcc_compilation;
-
- /* The type code that process_one_symbol saw on its previous invocation.
- Used to detect pairs of N_SO symbols. */
-
- EXTERN int previous_stab_code;
-
- /* Setup a define to deal cleanly with the underscore problem */
-
- #ifdef NAMES_HAVE_UNDERSCORE
- #define HASH_OFFSET 1
- #else
- #define HASH_OFFSET 0
- #endif
-
- /* Support for Sun changes to dbx symbol format */
-
- /* For each identified header file, we have a table of types defined
- in that header file.
-
- header_files maps header file names to their type tables.
- It is a vector of n_header_files elements.
- Each element describes one header file.
- It contains a vector of types.
-
- Sometimes it can happen that the same header file produces
- different results when included in different places.
- This can result from conditionals or from different
- things done before including the file.
- When this happens, there are multiple entries for the file in this table,
- one entry for each distinct set of results.
- The entries are distinguished by the INSTANCE field.
- The INSTANCE field appears in the N_BINCL and N_EXCL symbol table and is
- used to match header-file references to their corresponding data. */
-
- struct header_file
- {
- char *name; /* Name of header file */
- int instance; /* Numeric code distinguishing instances
- of one header file that produced
- different results when included.
- It comes from the N_BINCL or N_EXCL. */
- struct type **vector; /* Pointer to vector of types */
- int length; /* Allocated length (# elts) of that vector */
- };
-
- EXTERN struct header_file *header_files;
-
- EXTERN int n_header_files;
-
- EXTERN int n_allocated_header_files;
-
- /* Within each object file, various header files are assigned numbers.
- A type is defined or referred to with a pair of numbers
- (FILENUM,TYPENUM) where FILENUM is the number of the header file
- and TYPENUM is the number within that header file.
- TYPENUM is the index within the vector of types for that header file.
-
- FILENUM == 1 is special; it refers to the main source of the object file,
- and not to any header file. FILENUM != 1 is interpreted by looking it up
- in the following table, which contains indices in header_files. */
-
- EXTERN int *this_object_header_files;
-
- EXTERN int n_this_object_header_files;
-
- EXTERN int n_allocated_this_object_header_files;
-
- /* When a header file is getting special overriding definitions
- for one source file, record here the header_files index
- of its normal definition vector.
- At other times, this is -1. */
-
- EXTERN int header_file_prev_index;
-
- struct subfile_stack
- {
- struct subfile_stack *next;
- char *name;
- int prev_index;
- };
-
- EXTERN struct subfile_stack *subfile_stack;
-
- extern struct complaint unknown_symtype_complaint;
-
- #define next_symbol_text() (*next_symbol_text_func)()
-
- /* Function to invoke get the next symbol. Return the symbol name. */
-
- EXTERN char *(*next_symbol_text_func) PARAMS ((void));
-
- extern void
- add_symbol_to_list PARAMS ((struct symbol *, struct pending **));
-
- extern struct symbol *
- find_symbol_in_list PARAMS ((struct pending *, char *, int));
-
- extern void
- read_type_number PARAMS ((char **, int *));
-
- extern struct type *
- read_type PARAMS ((char **, struct objfile *));
-
- extern struct type **
- dbx_lookup_type PARAMS ((int [2]));
-
- extern long
- read_number PARAMS ((char **, int));
-
- extern void
- finish_block PARAMS ((struct symbol *, struct pending **,
- struct pending_block *, CORE_ADDR, CORE_ADDR,
- struct objfile *));
-
- extern void
- add_undefined_type PARAMS ((struct type *));
-
- extern void
- really_free_pendings PARAMS ((int foo));
-
- extern void
- start_subfile PARAMS ((char *, char *));
-
- extern void
- push_subfile PARAMS ((void));
-
- extern char *
- pop_subfile PARAMS ((void));
-
- extern struct symtab *
- end_symtab PARAMS ((CORE_ADDR, int, int,struct objfile *));
-
- extern void
- scan_file_globals PARAMS ((struct objfile *));
-
- extern void
- buildsym_new_init PARAMS ((void));
-
- extern void
- buildsym_init PARAMS ((void));
-
- extern struct context_stack *
- push_context PARAMS ((int, CORE_ADDR));
-
- extern void
- record_line PARAMS ((struct subfile *, int, CORE_ADDR));
-
- extern void
- start_symtab PARAMS ((char *, char *, CORE_ADDR));
-
- extern struct symbol *
- define_symbol PARAMS ((unsigned int, char *, int, int, struct objfile *));
-
- extern struct partial_symtab *
- start_psymtab PARAMS ((struct objfile *, CORE_ADDR, char *, CORE_ADDR, int,
- struct partial_symbol *, struct partial_symbol *));
-
- extern void
- end_psymtab PARAMS ((struct partial_symtab *, char **, int, int, CORE_ADDR,
- struct partial_symtab **, int));
-
- extern void
- process_one_symbol PARAMS ((int, int, CORE_ADDR, char *, int,
- struct objfile *));
-
- extern int
- hashname PARAMS ((char *));
-
- #endif /* defined (BUILDSYM_H) */
-