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Diffstat (limited to 'gdb/symfile.h')
| -rw-r--r-- | gdb/symfile.h | 300 |
1 files changed, 300 insertions, 0 deletions
diff --git a/gdb/symfile.h b/gdb/symfile.h new file mode 100644 index 00000000000..0363e1e1d28 --- /dev/null +++ b/gdb/symfile.h @@ -0,0 +1,300 @@ +/* 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) */ |