312 lines
10 KiB
C
312 lines
10 KiB
C
/* Definitions for reading symbol files into GDB.
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Copyright (C) 1990, 1991, 1992, 1993, 1994, 1996, 2000
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Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#if !defined (SYMFILE_H)
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#define SYMFILE_H
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/* This file requires that you first include "bfd.h". */
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/* Partial symbols are stored in the psymbol_cache and pointers to them
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are kept in a dynamically grown array that is obtained from malloc and
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grown as necessary via realloc. Each objfile typically has two of these,
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one for global symbols and one for static symbols. Although this adds
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a level of indirection for storing or accessing the partial symbols,
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it allows us to throw away duplicate psymbols and set all pointers
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to the single saved instance. */
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struct psymbol_allocation_list
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{
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/* Pointer to beginning of dynamically allocated array of pointers to
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partial symbols. The array is dynamically expanded as necessary to
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accommodate more pointers. */
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struct partial_symbol **list;
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/* Pointer to next available slot in which to store a pointer to a partial
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symbol. */
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struct partial_symbol **next;
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/* Number of allocated pointer slots in current dynamic array (not the
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number of bytes of storage). The "next" pointer will always point
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somewhere between list[0] and list[size], and when at list[size] the
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array will be expanded on the next attempt to store a pointer. */
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int size;
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};
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/* Define an array of addresses to accommodate non-contiguous dynamic
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loading of modules. This is for use when entering commands, so we
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can keep track of the section names until we read the file and
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can map them to bfd sections. This structure is also used by
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solib.c to communicate the section addresses in shared objects to
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symbol_file_add (). */
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#define MAX_SECTIONS 64
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struct section_addr_info
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{
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/* Sections whose names are file format dependent. */
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struct other_sections
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{
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CORE_ADDR addr;
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char *name;
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int sectindex;
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} other[MAX_SECTIONS];
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};
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/* Structure to keep track of symbol reading functions for various
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object file types. */
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struct sym_fns
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{
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/* BFD flavour that we handle, or (as a special kludge, see xcoffread.c,
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(enum bfd_flavour)-1 for xcoff). */
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enum bfd_flavour sym_flavour;
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/* Initializes anything that is global to the entire symbol table. It is
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called during symbol_file_add, when we begin debugging an entirely new
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program. */
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void (*sym_new_init) (struct objfile *);
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/* Reads any initial information from a symbol file, and initializes the
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struct sym_fns SF in preparation for sym_read(). It is called every
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time we read a symbol file for any reason. */
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void (*sym_init) (struct objfile *);
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/* sym_read (objfile, mainline)
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Reads a symbol file into a psymtab (or possibly a symtab).
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OBJFILE is the objfile struct for the file we are reading.
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MAINLINE is 1 if this is the
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main symbol table being read, and 0 if a secondary
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symbol file (e.g. shared library or dynamically loaded file)
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is being read. */
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void (*sym_read) (struct objfile *, int);
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/* Called when we are finished with an objfile. Should do all cleanup
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that is specific to the object file format for the particular objfile. */
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void (*sym_finish) (struct objfile *);
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/* This function produces a file-dependent section_offsets structure,
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allocated in the objfile's storage, and based on the parameter.
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The parameter is currently a CORE_ADDR (FIXME!) for backward compatibility
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with the higher levels of GDB. It should probably be changed to
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a string, where NULL means the default, and others are parsed in a file
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dependent way. */
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void (*sym_offsets) (struct objfile *, struct section_addr_info *);
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/* Finds the next struct sym_fns. They are allocated and initialized
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in whatever module implements the functions pointed to; an
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initializer calls add_symtab_fns to add them to the global chain. */
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struct sym_fns *next;
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};
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/* The default version of sym_fns.sym_offsets for readers that don't
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do anything special. */
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extern void
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default_symfile_offsets (struct objfile *objfile, struct section_addr_info *);
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extern void
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extend_psymbol_list (struct psymbol_allocation_list *, struct objfile *);
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/* Add any kind of symbol to a psymbol_allocation_list. */
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/* #include "demangle.h" */
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extern void
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add_psymbol_to_list (char *, int, namespace_enum, enum address_class,
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struct psymbol_allocation_list *, long, CORE_ADDR,
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enum language, struct objfile *);
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extern void
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add_psymbol_with_dem_name_to_list (char *, int, char *, int, namespace_enum,
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enum address_class,
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struct psymbol_allocation_list *,
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long, CORE_ADDR,
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enum language, struct objfile *);
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extern void init_psymbol_list (struct objfile *, int);
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extern void sort_pst_symbols (struct partial_symtab *);
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extern struct symtab *allocate_symtab (char *, struct objfile *);
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extern int free_named_symtabs (char *);
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extern void fill_in_vptr_fieldno (struct type *);
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extern void add_symtab_fns (struct sym_fns *);
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extern void init_entry_point_info (struct objfile *);
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extern void
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syms_from_objfile (struct objfile *, struct section_addr_info *, int, int);
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extern void new_symfile_objfile (struct objfile *, int, int);
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extern struct objfile *symbol_file_add (char *, int,
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struct section_addr_info *, int, int);
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/* Build (allocate and populate) a section_addr_info struct from
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an existing section table. */
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struct section_table;
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extern struct section_addr_info *
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build_section_addr_info_from_section_table (const struct section_table *start,
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const struct section_table *end);
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/* Free all memory allocated by build_section_addr_info_from_section_table. */
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extern void
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free_section_addr_info (struct section_addr_info *);
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extern struct partial_symtab *start_psymtab_common (struct objfile *,
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struct section_offsets *,
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char *, CORE_ADDR,
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struct partial_symbol **,
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struct partial_symbol **);
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/* Sorting your symbols for fast lookup or alphabetical printing. */
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extern void sort_block_syms (struct block *);
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extern void sort_symtab_syms (struct symtab *);
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/* Make a copy of the string at PTR with SIZE characters in the symbol obstack
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(and add a null character at the end in the copy).
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Returns the address of the copy. */
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extern char *obsavestring (char *, int, struct obstack *);
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/* Concatenate strings S1, S2 and S3; return the new string.
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Space is found in the symbol_obstack. */
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extern char *obconcat (struct obstack *obstackp, const char *, const char *,
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const char *);
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/* Variables */
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/* whether to auto load solibs at startup time: 0/1.
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On all platforms, 0 means "don't auto load".
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On HP-UX, > 0 means a threshhold, in megabytes, of symbol table which will
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be auto loaded. When the cumulative size of solib symbol table exceeds
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this threshhold, solibs' symbol tables will not be loaded.
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On other platforms, > 0 means, "always auto load".
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*/
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extern int auto_solib_add;
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/* From symfile.c */
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extern CORE_ADDR entry_point_address (void);
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extern struct partial_symtab *allocate_psymtab (char *, struct objfile *);
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extern void discard_psymtab (struct partial_symtab *);
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extern void find_lowest_section (bfd *, asection *, PTR);
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extern bfd *symfile_bfd_open (char *);
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/* Utility functions for overlay sections: */
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extern int overlay_debugging;
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extern int overlay_cache_invalid;
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/* return the "mapped" overlay section containing the PC */
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extern asection *find_pc_mapped_section (CORE_ADDR);
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/* return any overlay section containing the PC (even in its LMA region) */
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extern asection *find_pc_overlay (CORE_ADDR);
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/* return true if the section is an overlay */
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extern int section_is_overlay (asection *);
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/* return true if the overlay section is currently "mapped" */
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extern int section_is_mapped (asection *);
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/* return true if pc belongs to section's VMA */
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extern CORE_ADDR pc_in_mapped_range (CORE_ADDR, asection *);
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/* return true if pc belongs to section's LMA */
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extern CORE_ADDR pc_in_unmapped_range (CORE_ADDR, asection *);
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/* map an address from a section's LMA to its VMA */
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extern CORE_ADDR overlay_mapped_address (CORE_ADDR, asection *);
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/* map an address from a section's VMA to its LMA */
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extern CORE_ADDR overlay_unmapped_address (CORE_ADDR, asection *);
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/* convert an address in an overlay section (force into VMA range) */
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extern CORE_ADDR symbol_overlayed_address (CORE_ADDR, asection *);
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/* Load symbols from a file. */
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extern void symbol_file_add_main (char *args, int from_tty);
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/* Clear GDB symbol tables. */
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extern void symbol_file_clear (int from_tty);
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/* From dwarfread.c */
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extern void
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dwarf_build_psymtabs (struct objfile *, int, file_ptr, unsigned int,
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file_ptr, unsigned int);
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/* From dwarf2read.c */
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extern int dwarf2_has_info (bfd * abfd);
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extern void dwarf2_build_psymtabs (struct objfile *, int);
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/* From mdebugread.c */
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/* Hack to force structures to exist before use in parameter list. */
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struct ecoff_debug_hack
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{
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struct ecoff_debug_swap *a;
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struct ecoff_debug_info *b;
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};
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extern void
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mdebug_build_psymtabs (struct objfile *,
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const struct ecoff_debug_swap *,
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struct ecoff_debug_info *);
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extern void
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elfmdebug_build_psymtabs (struct objfile *,
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const struct ecoff_debug_swap *, asection *);
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#endif /* !defined(SYMFILE_H) */
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