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authorgdb-2.4+.aux.coff <gdb@fsf.org>1988-01-16 04:39:57 +0000
committerPedro Alves <palves@redhat.com>2012-06-03 15:36:30 +0100
commit7b4ac7e1ed2c4616bce56d1760807798be87ac9e (patch)
tree777c9f6aba126e91e4a25d7b1fa34c2213d038da /gdb/symtab.h
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+/* Symbol table definitions for GDB.
+ Copyright (C) 1986 Free Software Foundation, Inc.
+
+GDB is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY. No author or distributor accepts responsibility to anyone
+for the consequences of using it or for whether it serves any
+particular purpose or works at all, unless he says so in writing.
+Refer to the GDB General Public License for full details.
+
+Everyone is granted permission to copy, modify and redistribute GDB,
+but only under the conditions described in the GDB General Public
+License. A copy of this license is supposed to have been given to you
+along with GDB so you can know your rights and responsibilities. It
+should be in a file named COPYING. Among other things, the copyright
+notice and this notice must be preserved on all copies.
+
+In other words, go ahead and share GDB, but don't try to stop
+anyone else from sharing it farther. Help stamp out software hoarding!
+*/
+
+/* An obstack to hold objects that should be freed
+ when we load a new symbol table.
+ This includes the symbols made by dbxread
+ and the types that are not permanent. */
+
+extern struct obstack *symbol_obstack;
+
+/* Some definitions and declarations to go with use of obstacks. */
+#define obstack_chunk_alloc xmalloc
+#define obstack_chunk_free free
+extern char *xmalloc ();
+extern void free ();
+
+/* gdb can know one or several symbol tables at the same time;
+ the ultimate intent is to have one for each separately-compiled module.
+ Each such symbol table is recorded by a struct symtab, and they
+ are all chained together. */
+
+/* In addition, gdb can record any number of miscellaneous undebuggable
+ functions' addresses. In a system that appends _ to function names,
+ the _'s are removed from the names stored in this table. */
+
+struct misc_function
+{
+ char *name;
+ CORE_ADDR address;
+};
+
+/* Address and length of the vector recording all misc function names/addresses. */
+
+struct misc_function *misc_function_vector;
+int misc_function_count;
+
+#include "symseg.h"
+
+/* Each source file is represented by a struct symtab.
+ These objects are chained through the `next' field. */
+
+struct symtab
+ {
+ /* Chain of all existing symtabs. */
+ struct symtab *next;
+ /* List of all symbol scope blocks for this symtab. */
+ struct blockvector *blockvector;
+ /* Table mapping core addresses to line numbers for this file. */
+ struct linetable *linetable;
+ /* Vector containing all types defined for this symtab. */
+ struct typevector *typevector;
+ /* Name of this source file. */
+ char *filename;
+ /* This component says how to free the data we point to:
+ free_contents => do a tree walk and free each object.
+ free_explicit => free what free_ptr points at, and the linetable.
+ free_nothing => do nothing; some other symtab will free
+ the data this one uses.
+ free_linetable => free just the linetable. */
+ enum free_code {free_nothing, free_contents, free_explicit, free_linetable}
+ free_code;
+ /* Pointer to one block storage to be freed, if nonzero. */
+ char *free_ptr;
+ /* Total number of lines found in source file. */
+ int nlines;
+ /* Array mapping line number to character position. */
+ int *line_charpos;
+ /* Language of this source file. */
+ enum language language;
+ /* String of version information. May be zero. */
+ char *version;
+ /* String of compilation information. May be zero. */
+ char *compilation;
+ /* Offset within loader symbol table
+ of first local symbol for this file. */
+ int ldsymoff;
+ };
+
+/* This is the list of struct symtab's that gdb considers current. */
+
+struct symtab *symtab_list;
+
+/* This symtab variable specifies the current file for printing source lines */
+
+struct symtab *current_source_symtab;
+
+/* This is the next line to print for listing source lines. */
+
+int current_source_line;
+
+#define BLOCKLIST(symtab) (symtab)->blockvector
+#define BLOCKVECTOR(symtab) (symtab)->blockvector
+
+#define TYPEVECTOR(symtab) (symtab)->typevector
+
+#define LINELIST(symtab) (symtab)->linetable
+#define LINETABLE(symtab) (symtab)->linetable
+
+/* Recording the code addresses of source lines. */
+
+struct linetable
+ {
+ int nitems;
+ int item[1];
+ };
+
+/* Each item is either minus a line number, or a program counter.
+ If it represents a line number, that is the line described by the next
+ program counter value. If it is positive, it is the program
+ counter at which the code for the next line starts.
+
+ Consecutive lines can be recorded by program counter entries
+ with no line number entries between them. Line number entries
+ are used when there are lines to skip with no code on them.
+ This is to make the table shorter. */
+
+/* Macros normally used to access components of symbol table structures. */
+
+#define BLOCKLIST_NBLOCKS(blocklist) (blocklist)->nblocks
+#define BLOCKLIST_BLOCK(blocklist,n) (blocklist)->block[n]
+#define BLOCKVECTOR_NBLOCKS(blocklist) (blocklist)->nblocks
+#define BLOCKVECTOR_BLOCK(blocklist,n) (blocklist)->block[n]
+
+#define TYPEVECTOR_NTYPES(typelist) (typelist)->length
+#define TYPEVECTOR_TYPE(typelist,n) (typelist)->type[n]
+
+#define BLOCK_START(bl) (bl)->startaddr
+#define BLOCK_END(bl) (bl)->endaddr
+#define BLOCK_NSYMS(bl) (bl)->nsyms
+#define BLOCK_SYM(bl, n) (bl)->sym[n]
+#define BLOCK_FUNCTION(bl) (bl)->function
+#define BLOCK_SUPERBLOCK(bl) (bl)->superblock
+
+#define SYMBOL_NAME(symbol) (symbol)->name
+#define SYMBOL_NAMESPACE(symbol) (symbol)->namespace
+#define SYMBOL_CLASS(symbol) (symbol)->class
+#define SYMBOL_VALUE(symbol) (symbol)->value.value
+#define SYMBOL_VALUE_BYTES(symbol) (symbol)->value.bytes
+#define SYMBOL_BLOCK_VALUE(symbol) (symbol)->value.block
+#define SYMBOL_TYPE(symbol) (symbol)->type
+
+/* This appears in a type's flags word
+ if it is a (pointer to a|function returning a)* built in scalar type.
+ These types are never freed. */
+#define TYPE_FLAG_PERM 4
+
+#define TYPE_NAME(thistype) (thistype)->name
+#define TYPE_TARGET_TYPE(thistype) (thistype)->target_type
+#define TYPE_POINTER_TYPE(thistype) (thistype)->pointer_type
+#define TYPE_FUNCTION_TYPE(thistype) (thistype)->function_type
+#define TYPE_LENGTH(thistype) (thistype)->length
+#define TYPE_FLAGS(thistype) (thistype)->flags
+#define TYPE_UNSIGNED(thistype) ((thistype)->flags & TYPE_FLAG_UNSIGNED)
+#define TYPE_CODE(thistype) (thistype)->code
+#define TYPE_NFIELDS(thistype) (thistype)->nfields
+#define TYPE_FIELDS(thistype) (thistype)->fields
+
+#define TYPE_FIELD(thistype, n) (thistype)->fields[n]
+#define TYPE_FIELD_TYPE(thistype, n) (thistype)->fields[n].type
+#define TYPE_FIELD_NAME(thistype, n) (thistype)->fields[n].name
+#define TYPE_FIELD_VALUE(thistype, n) (* (int*) &(thistype)->fields[n].type)
+#define TYPE_FIELD_BITPOS(thistype, n) (thistype)->fields[n].bitpos
+#define TYPE_FIELD_BITSIZE(thistype, n) (thistype)->fields[n].bitsize
+#define TYPE_FIELD_PACKED(thistype, n) (thistype)->fields[n].bitsize
+
+/* Functions that work on the objects described above */
+
+extern struct symtab *lookup_symtab ();
+extern struct symbol *lookup_symbol ();
+extern struct type *lookup_typename ();
+extern struct type *lookup_unsigned_typename ();
+extern struct type *lookup_struct ();
+extern struct type *lookup_union ();
+extern struct type *lookup_enum ();
+extern struct type *lookup_pointer_type ();
+extern struct type *lookup_function_type ();
+extern struct symbol *block_function ();
+extern struct symbol *find_pc_function ();
+extern int find_pc_misc_function ();
+
+extern struct type *builtin_type_void;
+extern struct type *builtin_type_char;
+extern struct type *builtin_type_short;
+extern struct type *builtin_type_int;
+extern struct type *builtin_type_long;
+extern struct type *builtin_type_unsigned_char;
+extern struct type *builtin_type_unsigned_short;
+extern struct type *builtin_type_unsigned_int;
+extern struct type *builtin_type_unsigned_long;
+extern struct type *builtin_type_float;
+extern struct type *builtin_type_double;
+
+struct symtab_and_line
+{
+ struct symtab *symtab;
+ int line;
+ CORE_ADDR pc;
+ CORE_ADDR end;
+};
+
+/* Given a pc value, return line number it is in.
+ Second arg nonzero means if pc is on the boundary
+ use the previous statement's line number. */
+
+struct symtab_and_line find_pc_line ();
+
+/* Given a string, return the line specified by it.
+ For commands like "list" and "breakpoint". */
+
+struct symtab_and_line decode_line_spec ();
+struct symtab_and_line decode_line_1 ();