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authorStan Shebs <shebs@apple.com>1999-04-16 01:35:26 +0000
committerStan Shebs <shebs@apple.com>1999-04-16 01:35:26 +0000
commit14cd51f7793a9ce07bc435069f57269450141363 (patch)
tree280a2da48f771d61be5b451ddbacdf9ef8e9ad13 /gdb/symfile.h
downloadgdb-14cd51f7793a9ce07bc435069f57269450141363.tar.gz
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+/* Definitions for reading symbol files into GDB.
+ Copyright (C) 1990, 1991, 1992, 1993, 1994, 1996
+ 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+#if !defined (SYMFILE_H)
+#define SYMFILE_H
+
+/* This file requires that you first include "bfd.h". */
+
+/* Partial symbols are stored in the psymbol_cache and pointers to them
+ are kept in a dynamically grown array that is obtained from malloc and
+ grown as necessary via realloc. Each objfile typically has two of these,
+ one for global symbols and one for static symbols. Although this adds
+ a level of indirection for storing or accessing the partial symbols,
+ it allows us to throw away duplicate psymbols and set all pointers
+ to the single saved instance. */
+
+struct psymbol_allocation_list {
+
+ /* Pointer to beginning of dynamically allocated array of pointers to
+ partial symbols. The array is dynamically expanded as necessary to
+ accommodate more pointers. */
+
+ struct partial_symbol **list;
+
+ /* Pointer to next available slot in which to store a pointer to a partial
+ symbol. */
+
+ struct partial_symbol **next;
+
+ /* Number of allocated pointer slots in current dynamic array (not the
+ number of bytes of storage). The "next" pointer will always point
+ somewhere between list[0] and list[size], and when at list[size] the
+ array will be expanded on the next attempt to store a pointer. */
+
+ int size;
+};
+
+/* Structure to keep track of symbol reading functions for various
+ object file types. */
+
+struct sym_fns {
+
+ /* BFD flavour that we handle, or (as a special kludge, see xcoffread.c,
+ (enum bfd_flavour)-1 for xcoff). */
+
+ enum bfd_flavour sym_flavour;
+
+ /* Initializes anything that is global to the entire symbol table. It is
+ called during symbol_file_add, when we begin debugging an entirely new
+ program. */
+
+ void (*sym_new_init) PARAMS ((struct objfile *));
+
+ /* Reads any initial information from a symbol file, and initializes the
+ struct sym_fns SF in preparation for sym_read(). It is called every
+ time we read a symbol file for any reason. */
+
+ void (*sym_init) PARAMS ((struct objfile *));
+
+ /* sym_read (objfile, addr, mainline)
+ Reads a symbol file into a psymtab (or possibly a symtab).
+ OBJFILE is the objfile struct for the file we are reading.
+ SECTION_OFFSETS
+ are the offset between the file's specified section addresses and
+ their true addresses in memory.
+ MAINLINE is 1 if this is the
+ main symbol table being read, and 0 if a secondary
+ symbol file (e.g. shared library or dynamically loaded file)
+ is being read. */
+
+ void (*sym_read) PARAMS ((struct objfile *, struct section_offsets *, int));
+
+ /* Called when we are finished with an objfile. Should do all cleanup
+ that is specific to the object file format for the particular objfile. */
+
+ void (*sym_finish) PARAMS ((struct objfile *));
+
+ /* This function produces a file-dependent section_offsets structure,
+ allocated in the objfile's storage, and based on the parameter.
+ The parameter is currently a CORE_ADDR (FIXME!) for backward compatibility
+ with the higher levels of GDB. It should probably be changed to
+ a string, where NULL means the default, and others are parsed in a file
+ dependent way. The result of this function is handed in to sym_read. */
+
+ struct section_offsets *(*sym_offsets) PARAMS ((struct objfile *, CORE_ADDR));
+
+ /* Finds the next struct sym_fns. They are allocated and initialized
+ in whatever module implements the functions pointed to; an
+ initializer calls add_symtab_fns to add them to the global chain. */
+
+ struct sym_fns *next;
+
+};
+
+/* The default version of sym_fns.sym_offsets for readers that don't
+ do anything special. */
+
+extern struct section_offsets *
+default_symfile_offsets PARAMS ((struct objfile *objfile, CORE_ADDR addr));
+
+
+extern void
+extend_psymbol_list PARAMS ((struct psymbol_allocation_list *,
+ struct objfile *));
+
+/* Add any kind of symbol to a psymbol_allocation_list. */
+
+/* #include "demangle.h" */
+
+extern void
+add_psymbol_to_list PARAMS ((char *, int, namespace_enum, enum address_class,
+ struct psymbol_allocation_list *, long, CORE_ADDR,
+ enum language, struct objfile *));
+
+extern void
+add_psymbol_with_dem_name_to_list PARAMS ((char *, int, char *, int, namespace_enum,
+ enum address_class,
+ struct psymbol_allocation_list *,
+ long, CORE_ADDR,
+ enum language, struct objfile *));
+
+
+extern void init_psymbol_list PARAMS ((struct objfile *, int));
+
+extern void
+sort_pst_symbols PARAMS ((struct partial_symtab *));
+
+extern struct symtab *
+allocate_symtab PARAMS ((char *, struct objfile *));
+
+extern int
+free_named_symtabs PARAMS ((char *));
+
+extern void
+fill_in_vptr_fieldno PARAMS ((struct type *));
+
+extern void
+add_symtab_fns PARAMS ((struct sym_fns *));
+
+extern void
+init_entry_point_info PARAMS ((struct objfile *));
+
+extern void
+syms_from_objfile PARAMS ((struct objfile *, CORE_ADDR, int, int));
+
+extern void
+new_symfile_objfile PARAMS ((struct objfile *, int, int));
+
+extern struct partial_symtab *
+start_psymtab_common PARAMS ((struct objfile *, struct section_offsets *,
+ char *, CORE_ADDR,
+ struct partial_symbol **,
+ struct partial_symbol **));
+
+/* Sorting your symbols for fast lookup or alphabetical printing. */
+
+extern void
+sort_block_syms PARAMS ((struct block *));
+
+extern void
+sort_symtab_syms PARAMS ((struct symtab *));
+
+/* Make a copy of the string at PTR with SIZE characters in the symbol obstack
+ (and add a null character at the end in the copy).
+ Returns the address of the copy. */
+
+extern char *
+obsavestring PARAMS ((char *, int, struct obstack *));
+
+/* Concatenate strings S1, S2 and S3; return the new string.
+ Space is found in the symbol_obstack. */
+
+extern char *
+obconcat PARAMS ((struct obstack *obstackp, const char *, const char *,
+ const char *));
+
+ /* Variables */
+
+/* whether to auto load solibs at startup time: 0/1.
+
+ On all platforms, 0 means "don't auto load".
+
+ On HP-UX, > 0 means a threshhold, in megabytes, of symbol table which will
+ be auto loaded. When the cumulative size of solib symbol table exceeds
+ this threshhold, solibs' symbol tables will not be loaded.
+
+ On other platforms, > 0 means, "always auto load".
+ */
+
+extern int auto_solib_add;
+
+/* From symfile.c */
+
+extern CORE_ADDR
+entry_point_address PARAMS ((void));
+
+extern struct partial_symtab *
+allocate_psymtab PARAMS ((char *, struct objfile *));
+
+extern void
+discard_psymtab PARAMS ((struct partial_symtab *));
+
+extern void find_lowest_section PARAMS ((bfd *, asection *, PTR));
+
+extern bfd * symfile_bfd_open PARAMS ((char *));
+
+/* Remote targets may wish to use this as their load function. */
+extern void generic_load PARAMS ((char *name, int from_tty));
+
+/* Utility functions for overlay sections: */
+extern int overlay_debugging;
+extern int overlay_cache_invalid;
+
+/* return the "mapped" overlay section containing the PC */
+extern asection *
+find_pc_mapped_section PARAMS ((CORE_ADDR));
+
+/* return any overlay section containing the PC (even in its LMA region) */
+extern asection *
+find_pc_overlay PARAMS ((CORE_ADDR));
+
+/* return true if the section is an overlay */
+extern int
+section_is_overlay PARAMS ((asection *));
+
+/* return true if the overlay section is currently "mapped" */
+extern int
+section_is_mapped PARAMS ((asection *));
+
+/* return true if pc belongs to section's VMA */
+extern CORE_ADDR
+pc_in_mapped_range PARAMS ((CORE_ADDR, asection *));
+
+/* return true if pc belongs to section's LMA */
+extern CORE_ADDR
+pc_in_unmapped_range PARAMS ((CORE_ADDR, asection *));
+
+/* map an address from a section's LMA to its VMA */
+extern CORE_ADDR
+overlay_mapped_address PARAMS ((CORE_ADDR, asection *));
+
+/* map an address from a section's VMA to its LMA */
+extern CORE_ADDR
+overlay_unmapped_address PARAMS ((CORE_ADDR, asection *));
+
+/* convert an address in an overlay section (force into VMA range) */
+extern CORE_ADDR
+symbol_overlayed_address PARAMS ((CORE_ADDR, asection *));
+
+/* From dwarfread.c */
+
+extern void
+dwarf_build_psymtabs PARAMS ((struct objfile *, struct section_offsets *, int,
+ file_ptr, unsigned int, file_ptr, unsigned int));
+
+/* From dwarf2read.c */
+
+extern int dwarf2_has_info PARAMS ((bfd *abfd));
+
+extern void dwarf2_build_psymtabs PARAMS ((struct objfile *,
+ struct section_offsets *,
+ int));
+/* From mdebugread.c */
+
+/* Hack to force structures to exist before use in parameter list. */
+struct ecoff_debug_hack
+{
+ struct ecoff_debug_swap *a;
+ struct ecoff_debug_info *b;
+};
+extern void
+mdebug_build_psymtabs PARAMS ((struct objfile *,
+ const struct ecoff_debug_swap *,
+ struct ecoff_debug_info *,
+ struct section_offsets *));
+
+extern void
+elfmdebug_build_psymtabs PARAMS ((struct objfile *,
+ const struct ecoff_debug_swap *,
+ asection *,
+ struct section_offsets *));
+
+#endif /* !defined(SYMFILE_H) */