X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Fsymfile.h;h=35913c08cd8cea2a089127ac178bdcc15a68d9ca;hb=4b14d3e4e0d9ba2ff2f9397312f884f8fc9a1135;hp=67851170f1f351508224e717cde293da5db3a132;hpb=bd5635a1e2b38ee8432fcdaa6456079191375277;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/symfile.h b/gdb/symfile.h index 67851170f1..35913c08cd 100644 --- a/gdb/symfile.h +++ b/gdb/symfile.h @@ -1,170 +1,330 @@ /* Definitions for reading symbol files into GDB. - Copyright (C) 1990 Free Software Foundation, Inc. + Copyright (C) 1990, 1991, 1992, 1993, 1994, 1996 + Free Software Foundation, Inc. -This file is part of GDB. + This file is part of GDB. -GDB 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 1, or (at your option) -any later version. + 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. -GDB 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. + 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 GDB; see the file COPYING. If not, write to -the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + 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". */ -/* Data structures and function definitions for dealing with - symbol table reading from files. */ +/* 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 40 +struct section_addr_info +{ + /* Sections whose names are file format dependant. */ + 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 { +struct sym_fns + { - /* sym_name - is the name, or name prefix, of the BFD "target type" that this - set of functions handles. E.g. "a.out" or "sunOs" or "coff". */ + /* BFD flavour that we handle, or (as a special kludge, see xcoffread.c, + (enum bfd_flavour)-1 for xcoff). */ - char *sym_name; + enum bfd_flavour sym_flavour; - /* sym_namelen - counts how many bytes of sym_name should be checked against the - BFD target type of the file being read. If an exact match is - desired, specify the number of characters in sym_name plus 1 for the - NUL. If a prefix match is desired, specify the number of characters in - sym_name. */ + /* 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. */ - int sym_namelen; + void (*sym_new_init) PARAMS ((struct objfile *)); - /* sym_new_init - initializes anything that is global to the entire - symbol table. It is called e.g. during symbol_file_command, when - we begin debugging an entirely new program. */ + /* 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_new_init) (); + void (*sym_init) PARAMS ((struct objfile *)); - /* sym_init (sf) - 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. */ + /* 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_init) (); + void (*sym_read) PARAMS ((struct objfile *, int)); - /* sym_read (sf, addr, mainline) - reads a symbol file into a psymtab (or possibly a symtab). - SF is the struct sym_fns that sym_init initialized. ADDR - is the offset between the file's specified start address and - its true address 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. */ + /* 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_read) (); + void (*sym_finish) PARAMS ((struct objfile *)); - /* sym_discard (sf) - discards any cached information from SF or elsewhere, that - was saved as part of reading a single symbol file. */ + /* 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_discard) (); + void (*sym_offsets) PARAMS ((struct objfile *, struct section_addr_info *)); - /* sym_bfd - is the accessor for the symbol file being read. */ + /* 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. */ - bfd *sym_bfd; + struct sym_fns *next; - /* sym_private - is where information can be shared among sym_init, sym_read and - sym_discard. It is typically a pointer to malloc'd memory. */ + }; - char *sym_private; /* Should be void * */ +/* The default version of sym_fns.sym_offsets for readers that don't + do anything special. */ - /* next - 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; -}; +extern void +default_symfile_offsets PARAMS ((struct objfile * objfile, struct section_addr_info *)); + + +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 *, struct section_addr_info *, int, int)); + +extern void +new_symfile_objfile PARAMS ((struct objfile *, int, int)); + +extern struct objfile * +symbol_file_add PARAMS ((char *, int, struct section_addr_info *, int, int)); - /* Functions */ +/* Build (allocate and populate) a section_addr_info struct from + an existing section table. */ -extern void free_named_symtab (); -extern int fill_in_vptr_fieldno (); -extern void add_symtab_fns (); +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); -/* Functions for dealing with the misc "function" vector, really a misc - address<->symbol mapping vector for things we don't have debug symbols - for. */ +/* Free all memory allocated by build_section_addr_info_from_section_table. */ -extern void init_misc_bunches (); -extern void prim_record_misc_function (); -extern void discard_misc_bunches (); -extern void condense_misc_bunches (); +extern void +free_section_addr_info (struct section_addr_info *); + + +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 (); -extern void sort_symtab_syms (); -extern void sort_all_symtab_syms (); -extern void sort_block_syms (); +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 (); +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 (); +extern char * + obconcat PARAMS ((struct obstack * obstackp, const char *, const char *, + const char *)); /* Variables */ -/* File name symbols were loaded from. */ +/* whether to auto load solibs at startup time: 0/1. -extern char *symfile; + On all platforms, 0 means "don't auto load". -/* The modification date of the file when they were loaded. */ + 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. -extern int symfile_mtime; + On other platforms, > 0 means, "always auto load". + */ -/* The BFD for this file -- only good while we're actively reading - symbols into a psymtab or a symtab. */ +extern int auto_solib_add; -static bfd *symfile_bfd; +/* From symfile.c */ -/* Vectors of all partial symbols read in from file. */ +extern CORE_ADDR + entry_point_address PARAMS ((void)); -extern struct psymbol_allocation_list { - struct partial_symbol *list, *next; - int size; -} global_psymbols, static_psymbols; +extern struct partial_symtab * + allocate_psymtab PARAMS ((char *, struct objfile *)); -/* Support for complaining about things in the symbol file that aren't - catastrophic. +extern void +discard_psymtab PARAMS ((struct partial_symtab *)); - Each such thing gets a counter. The first time we have the problem, - during a symbol read, we report it. At the end of symbol reading, - if verbose, we report how many of each problem we had. */ +extern void find_lowest_section PARAMS ((bfd *, asection *, PTR)); -struct complaint { - char *message; - unsigned counter; - struct complaint *next; -}; +extern bfd *symfile_bfd_open PARAMS ((char *)); + +/* 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 *, 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 *, int)); -/* Root of the chain of complaints that have at some point been issued. - This is used to reset the counters, and/or report the total counts. */ +/* From mdebugread.c */ -extern struct complaint complaint_root[1]; +/* 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 *)); -/* Functions that handle complaints. (in symfile.c) */ +extern void +elfmdebug_build_psymtabs PARAMS ((struct objfile *, + const struct ecoff_debug_swap *, + asection *)); -int complain(); -void clear_complaints(); +#endif /* !defined(SYMFILE_H) */