X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Fsymfile.h;h=7ae819c5e5b22418b5025989c58a28d942968c87;hb=567995e103055787c86c42096397015a55e02fd4;hp=189767fa6d7da593391edeecc6061ac4e4ffb50b;hpb=b011df52462903c6b73e436a06b9b8e55e84185e;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/symfile.h b/gdb/symfile.h index 189767fa6d..7ae819c5e5 100644 --- a/gdb/symfile.h +++ b/gdb/symfile.h @@ -1,170 +1,415 @@ /* Definitions for reading symbol files into GDB. - Copyright (C) 1990 Free Software Foundation, Inc. -This file is part of GDB. + Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, + 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009, 2010 + Free Software Foundation, Inc. -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 file is part of GDB. -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 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 3 of the License, or + (at your option) any later version. -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. */ + 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, see . */ + +#if !defined (SYMFILE_H) +#define SYMFILE_H /* This file requires that you first include "bfd.h". */ +#include "symtab.h" + +/* Opaque declarations. */ +struct target_section; +struct objfile; +struct obj_section; +struct obstack; +struct block; + +/* 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; -/* Data structures and function definitions for dealing with - symbol table reading from files. */ + /* 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 (). */ + +struct section_addr_info +{ + /* The number of sections for which address information is + available. */ + size_t num_sections; + /* Sections whose names are file format dependent. */ + struct other_sections + { + CORE_ADDR addr; + char *name; + int sectindex; + } other[1]; +}; + + +/* A table listing the load segments in a symfile, and which segment + each BFD section belongs to. */ +struct symfile_segment_data +{ + /* How many segments are present in this file. If there are + two, the text segment is the first one and the data segment + is the second one. */ + int num_segments; + + /* If NUM_SEGMENTS is greater than zero, the original base address + of each segment. */ + CORE_ADDR *segment_bases; + + /* If NUM_SEGMENTS is greater than zero, the memory size of each + segment. */ + CORE_ADDR *segment_sizes; + + /* If NUM_SEGMENTS is greater than zero, this is an array of entries + recording which segment contains each BFD section. + SEGMENT_INFO[I] is S+1 if the I'th BFD section belongs to segment + S, or zero if it is not in any segment. */ + int *segment_info; +}; /* 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) (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) (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, symfile_flags) Reads a symbol file into a psymtab + (or possibly a symtab). OBJFILE is the objfile struct for the + file we are reading. SYMFILE_FLAGS are the flags passed to + symbol_file_add & co. */ - void (*sym_init) (); + void (*sym_read) (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) (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) (struct objfile *, struct section_addr_info *); - /* sym_bfd - is the accessor for the symbol file being read. */ + /* This function produces a format-independent description of + the segments of ABFD. Each segment is a unit of the file + which may be relocated independently. */ - bfd *sym_bfd; + struct symfile_segment_data *(*sym_segments) (bfd *abfd); - /* 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. */ + /* This function should read the linetable from the objfile when + the line table cannot be read while processing the debugging + information. */ + void (*sym_read_linetable) (void); - char *sym_private; /* Should be void * */ + /* 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. */ - /* 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; + }; - /* Functions */ +extern struct section_addr_info * + build_section_addr_info_from_objfile (const struct objfile *objfile); + +extern void relative_addr_info_to_section_offsets + (struct section_offsets *section_offsets, int num_sections, + struct section_addr_info *addrs); + +extern void addr_info_make_relative (struct section_addr_info *addrs, + bfd *abfd); + +/* 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 *); + +/* The default version of sym_fns.sym_segments for readers that don't + do anything special. */ + +extern struct symfile_segment_data *default_symfile_segments (bfd *abfd); + +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 const +struct partial_symbol *add_psymbol_to_list (char *, int, int, domain_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 add_symtab_fns (struct sym_fns *); + +/* This enum encodes bit-flags passed as ADD_FLAGS parameter to + syms_from_objfile, symbol_file_add, etc. */ + +enum symfile_add_flags + { + /* Be chatty about what you are doing. */ + SYMFILE_VERBOSE = 1 << 1, -extern int free_named_symtabs (); -extern void fill_in_vptr_fieldno (); -extern void add_symtab_fns (); + /* This is the main symbol file (as opposed to symbol file for dynamically + loaded code). */ + SYMFILE_MAINLINE = 1 << 2, -/* Functions for dealing with the misc "function" vector, really a misc - address<->symbol mapping vector for things we don't have debug symbols - for. */ + /* Do not call breakpoint_re_set when adding this symbol file. */ + SYMFILE_DEFER_BP_RESET = 1 << 3 + }; -extern void init_misc_bunches (); -extern void prim_record_misc_function (); -extern void discard_misc_bunches (); -extern void condense_misc_bunches (); +extern void syms_from_objfile (struct objfile *, + struct section_addr_info *, + struct section_offsets *, int, int); -/* Sorting your symbols for fast lookup or alphabetical printing. */ +extern void new_symfile_objfile (struct objfile *, int); -extern void sort_block_syms (); -extern void sort_symtab_syms (); -extern void sort_all_symtab_syms (); -extern void sort_block_syms (); +extern struct objfile *symbol_file_add (char *, int, + struct section_addr_info *, int); -/* 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 struct objfile *symbol_file_add_from_bfd (bfd *, int, + struct section_addr_info *, + int); -extern char *obsavestring (); +extern void symbol_file_add_separate (bfd *, int, struct objfile *); -/* Concatenate strings S1, S2 and S3; return the new string. - Space is found in the symbol_obstack. */ +extern char *find_separate_debug_file_by_debuglink (struct objfile *); -extern char *obconcat (); +/* Create a new section_addr_info, with room for NUM_SECTIONS. */ + +extern struct section_addr_info *alloc_section_addr_info (size_t + num_sections); + +/* Build (allocate and populate) a section_addr_info struct from an + existing section table. */ + +extern struct section_addr_info + *build_section_addr_info_from_section_table (const struct target_section + *start, + const struct target_section + *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 *, + const char *, CORE_ADDR, + struct partial_symbol **, + struct partial_symbol **); + +/* 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 (const char *, int, struct obstack *); + +/* Concatenate strings S1, S2 and S3; return the new string. Space is + found in the OBSTACKP */ + +extern char *obconcat (struct obstack *obstackp, const char *, const char *, + const char *); /* Variables */ -/* File name symbols were loaded from. */ +/* 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 char *symfile; +extern int auto_solib_add; -/* The modification date of the file when they were loaded. */ +/* 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 symfile_mtime; +extern int auto_solib_limit; -/* The BFD for this file -- only good while we're actively reading - symbols into a psymtab or a symtab. */ +/* From symfile.c */ -static bfd *symfile_bfd; +extern void set_initial_language (void); -/* Vectors of all partial symbols read in from file. */ +extern struct partial_symtab *allocate_psymtab (const char *, + struct objfile *); -extern struct psymbol_allocation_list { - struct partial_symbol *list, *next; - int size; -} global_psymbols, static_psymbols; +extern void discard_psymtab (struct partial_symtab *); -/* Support for complaining about things in the symbol file that aren't - catastrophic. +extern void find_lowest_section (bfd *, asection *, void *); - 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 bfd *symfile_bfd_open (char *); -struct complaint { - char *message; - unsigned counter; - struct complaint *next; -}; +extern bfd *bfd_open_maybe_remote (const 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 struct obj_section *find_pc_mapped_section (CORE_ADDR); + +/* Return any overlay section containing the PC (even in its LMA + region). */ +extern struct obj_section *find_pc_overlay (CORE_ADDR); + +/* Return true if the section is an overlay. */ +extern int section_is_overlay (struct obj_section *); -/* 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. */ +/* Return true if the overlay section is currently "mapped". */ +extern int section_is_mapped (struct obj_section *); + +/* Return true if pc belongs to section's VMA. */ +extern CORE_ADDR pc_in_mapped_range (CORE_ADDR, struct obj_section *); + +/* Return true if pc belongs to section's LMA. */ +extern CORE_ADDR pc_in_unmapped_range (CORE_ADDR, struct obj_section *); + +/* Map an address from a section's LMA to its VMA. */ +extern CORE_ADDR overlay_mapped_address (CORE_ADDR, struct obj_section *); + +/* Map an address from a section's VMA to its LMA. */ +extern CORE_ADDR overlay_unmapped_address (CORE_ADDR, struct obj_section *); + +/* Convert an address in an overlay section (force into VMA range). */ +extern CORE_ADDR symbol_overlayed_address (CORE_ADDR, struct obj_section *); + +/* 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); + +/* Default overlay update function. */ +extern void simple_overlay_update (struct obj_section *); + +extern bfd_byte *symfile_relocate_debug_section (bfd *abfd, asection *sectp, + bfd_byte * buf); + +extern int symfile_map_offsets_to_segments (bfd *, + struct symfile_segment_data *, + struct section_offsets *, + int, const CORE_ADDR *); +struct symfile_segment_data *get_symfile_segment_data (bfd *abfd); +void free_symfile_segment_data (struct symfile_segment_data *data); + +/* From dwarf2read.c */ + +extern int dwarf2_has_info (struct objfile *); + +extern void dwarf2_build_psymtabs (struct objfile *); +extern void dwarf2_build_frame_info (struct objfile *); + +void dwarf2_free_objfile (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 struct complaint complaint_root[1]; +extern void mdebug_build_psymtabs (struct objfile *, + const struct ecoff_debug_swap *, + struct ecoff_debug_info *); -/* Functions that handle complaints. (in symfile.c) */ +extern void elfmdebug_build_psymtabs (struct objfile *, + const struct ecoff_debug_swap *, + asection *); -int complain(); -void clear_complaints(); +#endif /* !defined(SYMFILE_H) */