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Diffstat (limited to 'gdb/symfile.h')
| -rw-r--r-- | gdb/symfile.h | 328 |
1 files changed, 328 insertions, 0 deletions
diff --git a/gdb/symfile.h b/gdb/symfile.h new file mode 100644 index 0000000..39eb308 --- /dev/null +++ b/gdb/symfile.h @@ -0,0 +1,328 @@ +/* Definitions for reading symbol files into GDB. + Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, + 2000, 2001 + 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; + }; + +/* Define an array of addresses to accommodate non-contiguous dynamic + loading of modules. This is for use when entering commands, so we + can keep track of the section names until we read the file and + can map them to bfd sections. This structure is also used by + solib.c to communicate the section addresses in shared objects to + symbol_file_add (). */ + +#define MAX_SECTIONS 64 +struct section_addr_info +{ + /* Sections whose names are file format dependent. */ + struct other_sections + { + CORE_ADDR addr; + char *name; + int sectindex; + } other[MAX_SECTIONS]; +}; + +/* 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) (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) (struct objfile *); + + /* sym_read (objfile, mainline) + Reads a symbol file into a psymtab (or possibly a symtab). + OBJFILE is the objfile struct for the file we are reading. + 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) (struct objfile *, 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) (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. */ + + void (*sym_offsets) (struct objfile *, struct section_addr_info *); + + /* 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 void +default_symfile_offsets (struct objfile *objfile, struct section_addr_info *); + + +extern void +extend_psymbol_list (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 (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 (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 (struct objfile *, int); + +extern void sort_pst_symbols (struct partial_symtab *); + +extern struct symtab *allocate_symtab (char *, struct objfile *); + +extern int free_named_symtabs (char *); + +extern void fill_in_vptr_fieldno (struct type *); + +extern void add_symtab_fns (struct sym_fns *); + +extern void init_entry_point_info (struct objfile *); + +extern void +syms_from_objfile (struct objfile *, struct section_addr_info *, int, int); + +extern void new_symfile_objfile (struct objfile *, int, int); + +extern struct objfile *symbol_file_add (char *, int, + struct section_addr_info *, int, int); + +/* Build (allocate and populate) a section_addr_info struct from + an existing section table. */ + +struct section_table; +extern struct section_addr_info * +build_section_addr_info_from_section_table (const struct section_table *start, + const struct section_table *end); + +/* Free all memory allocated by build_section_addr_info_from_section_table. */ + +extern void +free_section_addr_info (struct section_addr_info *); + + +extern struct partial_symtab *start_psymtab_common (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 (struct block *); + +extern void sort_symtab_syms (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 (char *, int, struct obstack *); + +/* Concatenate strings S1, S2 and S3; return the new string. + Space is found in the symbol_obstack. */ + +extern char *obconcat (struct obstack *obstackp, const char *, const char *, + const char *); + + /* Variables */ + +/* If non-zero, shared library symbols will be added automatically + when the inferior is created, new libraries are loaded, or when + attaching to the inferior. This is almost always what users will + want to have happen; but for very large programs, the startup time + will be excessive, and so if this is a problem, the user can clear + this flag and then add the shared library symbols as needed. Note + that there is a potential for confusion, since if the shared + library symbols are not loaded, commands like "info fun" will *not* + report all the functions that are actually present. */ + +extern int auto_solib_add; + +/* For systems that support it, a threshold size in megabytes. If + automatically adding a new library's symbol table to those already + known to the debugger would cause the total shared library symbol + size to exceed this threshhold, then the shlib's symbols are not + added. The threshold is ignored if the user explicitly asks for a + shlib to be added, such as when using the "sharedlibrary" + command. */ + +extern int auto_solib_limit; + +/* From symfile.c */ + +extern CORE_ADDR entry_point_address (void); + +extern struct partial_symtab *allocate_psymtab (char *, struct objfile *); + +extern void discard_psymtab (struct partial_symtab *); + +extern void find_lowest_section (bfd *, asection *, PTR); + +extern bfd *symfile_bfd_open (char *); + +extern int get_section_index (struct objfile *, char *); + +/* Utility functions for overlay sections: */ +extern enum overlay_debugging_state { + ovly_off, + ovly_on, + ovly_auto +} overlay_debugging; +extern int overlay_cache_invalid; + +/* return the "mapped" overlay section containing the PC */ +extern asection *find_pc_mapped_section (CORE_ADDR); + +/* return any overlay section containing the PC (even in its LMA region) */ +extern asection *find_pc_overlay (CORE_ADDR); + +/* return true if the section is an overlay */ +extern int section_is_overlay (asection *); + +/* return true if the overlay section is currently "mapped" */ +extern int section_is_mapped (asection *); + +/* return true if pc belongs to section's VMA */ +extern CORE_ADDR pc_in_mapped_range (CORE_ADDR, asection *); + +/* return true if pc belongs to section's LMA */ +extern CORE_ADDR pc_in_unmapped_range (CORE_ADDR, asection *); + +/* map an address from a section's LMA to its VMA */ +extern CORE_ADDR overlay_mapped_address (CORE_ADDR, asection *); + +/* map an address from a section's VMA to its LMA */ +extern CORE_ADDR overlay_unmapped_address (CORE_ADDR, asection *); + +/* convert an address in an overlay section (force into VMA range) */ +extern CORE_ADDR symbol_overlayed_address (CORE_ADDR, asection *); + +/* Load symbols from a file. */ +extern void symbol_file_add_main (char *args, int from_tty); + +/* Clear GDB symbol tables. */ +extern void symbol_file_clear (int from_tty); + +/* From dwarfread.c */ + +extern void +dwarf_build_psymtabs (struct objfile *, int, file_ptr, unsigned int, + file_ptr, unsigned int); + +/* From dwarf2read.c */ + +extern int dwarf2_has_info (bfd * abfd); + +extern void dwarf2_build_psymtabs (struct objfile *, int); +extern void dwarf2_build_frame_info (struct objfile *); + +/* 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 (struct objfile *, + const struct ecoff_debug_swap *, + struct ecoff_debug_info *); + +extern void +elfmdebug_build_psymtabs (struct objfile *, + const struct ecoff_debug_swap *, asection *); + +#endif /* !defined(SYMFILE_H) */ |