#define SYMTAB_H 1
/* Opaque declarations. */
+
struct obstack;
struct objfile;
+struct block;
+struct blockvector;
/* Don't do this; it means that if some .o's are compiled with GNU C
and some are not (easy to do accidentally the way we configure
#define MSYMBOL_INFO(msymbol) (msymbol)->info
#define MSYMBOL_TYPE(msymbol) (msymbol)->type
-\f
-
-
-/* All of the name-scope contours of the program
- are represented by `struct block' objects.
- All of these objects are pointed to by the blockvector.
-
- Each block represents one name scope.
- Each lexical context has its own block.
-
- The blockvector begins with some special blocks.
- The GLOBAL_BLOCK contains all the symbols defined in this compilation
- whose scope is the entire program linked together.
- The STATIC_BLOCK contains all the symbols whose scope is the
- entire compilation excluding other separate compilations.
- Blocks starting with the FIRST_LOCAL_BLOCK are not special.
-
- Each block records a range of core addresses for the code that
- is in the scope of the block. The STATIC_BLOCK and GLOBAL_BLOCK
- give, for the range of code, the entire range of code produced
- by the compilation that the symbol segment belongs to.
-
- The blocks appear in the blockvector
- in order of increasing starting-address,
- and, within that, in order of decreasing ending-address.
-
- This implies that within the body of one function
- the blocks appear in the order of a depth-first tree walk. */
-
-struct blockvector
-{
- /* Number of blocks in the list. */
- int nblocks;
- /* The blocks themselves. */
- struct block *block[1];
-};
-
-#define BLOCKVECTOR_NBLOCKS(blocklist) (blocklist)->nblocks
-#define BLOCKVECTOR_BLOCK(blocklist,n) (blocklist)->block[n]
-
-/* Special block numbers */
-
-#define GLOBAL_BLOCK 0
-#define STATIC_BLOCK 1
-#define FIRST_LOCAL_BLOCK 2
-
-struct block
-{
-
- /* Addresses in the executable code that are in this block. */
-
- CORE_ADDR startaddr;
- CORE_ADDR endaddr;
-
- /* The symbol that names this block, if the block is the body of a
- function; otherwise, zero. */
-
- struct symbol *function;
-
- /* The `struct block' for the containing block, or 0 if none.
-
- The superblock of a top-level local block (i.e. a function in the
- case of C) is the STATIC_BLOCK. The superblock of the
- STATIC_BLOCK is the GLOBAL_BLOCK. */
-
- struct block *superblock;
-
- /* Version of GCC used to compile the function corresponding
- to this block, or 0 if not compiled with GCC. When possible,
- GCC should be compatible with the native compiler, or if that
- is not feasible, the differences should be fixed during symbol
- reading. As of 16 Apr 93, this flag is never used to distinguish
- between gcc2 and the native compiler.
- If there is no function corresponding to this block, this meaning
- of this flag is undefined. */
-
- unsigned char gcc_compile_flag;
-
- /* The symbols for this block are either in a simple linear list or
- in a simple hashtable. Blocks which correspond to a function
- (which have a list of symbols corresponding to arguments) use
- a linear list, as do some older symbol readers (currently only
- mdebugread and dstread). Other blocks are hashed.
-
- The hashtable uses the same hash function as the minsym hashtables,
- found in minsyms.c:minsym_hash_iw. Symbols are hashed based on
- their demangled name if appropriate, and on their name otherwise.
- The hash function ignores space, and stops at the beginning of the
- argument list if any.
-
- The table is laid out in NSYMS/5 buckets and symbols are chained via
- their hash_next field. */
-
- /* If this is really a hashtable of the symbols, this flag is 1. */
-
- unsigned char hashtable;
-
- /* Number of local symbols. */
-
- int nsyms;
-
- /* The symbols. If some of them are arguments, then they must be
- in the order in which we would like to print them. */
-
- struct symbol *sym[1];
-};
-
-#define BLOCK_START(bl) (bl)->startaddr
-#define BLOCK_END(bl) (bl)->endaddr
-#define BLOCK_FUNCTION(bl) (bl)->function
-#define BLOCK_SUPERBLOCK(bl) (bl)->superblock
-#define BLOCK_GCC_COMPILED(bl) (bl)->gcc_compile_flag
-#define BLOCK_HASHTABLE(bl) (bl)->hashtable
-
-/* For blocks without a hashtable (BLOCK_HASHTABLE (bl) == 0) only. */
-#define BLOCK_NSYMS(bl) (bl)->nsyms
-#define BLOCK_SYM(bl, n) (bl)->sym[n]
-
-/* For blocks with a hashtable, but these are valid for non-hashed blocks as
- well - each symbol will appear to be one bucket by itself. */
-#define BLOCK_BUCKETS(bl) (bl)->nsyms
-#define BLOCK_BUCKET(bl, n) (bl)->sym[n]
-
-/* Macro used to set the size of a hashtable for N symbols. */
-#define BLOCK_HASHTABLE_SIZE(n) ((n)/5 + 1)
-
-/* Macro to loop through all symbols in a block BL, in no particular order.
- i counts which bucket we are in, and sym points to the current symbol. */
-
-#define ALL_BLOCK_SYMBOLS(bl, i, sym) \
- for ((i) = 0; (i) < BLOCK_BUCKETS ((bl)); (i)++) \
- for ((sym) = BLOCK_BUCKET ((bl), (i)); (sym); \
- (sym) = (sym)->hash_next)
-
-/* Nonzero if symbols of block BL should be sorted alphabetically.
- Don't sort a block which corresponds to a function. If we did the
- sorting would have to preserve the order of the symbols for the
- arguments. Also don't sort any block that we chose to hash. */
-
-#define BLOCK_SHOULD_SORT(bl) (! BLOCK_HASHTABLE (bl) \
- && BLOCK_FUNCTION (bl) == NULL)
\f
/* Represent one symbol name; a variable, constant, function or typedef. */
extern struct type *lookup_enum (char *, struct block *);
-/* lookup the function corresponding to the block */
-
-extern struct symbol *block_function (struct block *);
-
/* from blockframe.c: */
/* lookup the function symbol corresponding to the address */
extern int find_pc_line_pc_range (CORE_ADDR, CORE_ADDR *, CORE_ADDR *);
-extern int contained_in (struct block *, struct block *);
-
extern void reread_symbols (void);
extern struct type *lookup_transparent_type (const char *);
extern struct symtab_and_line find_function_start_sal (struct symbol *sym,
int);
-/* blockframe.c */
-
-extern struct blockvector *blockvector_for_pc (CORE_ADDR, int *);
-
-extern struct blockvector *blockvector_for_pc_sect (CORE_ADDR, asection *,
- int *, struct symtab *);
-
/* symfile.c */
extern void clear_symtab_users (void);
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