X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Fsymfile.h;h=eb5beaa6739c8fbe3d2b6de50017d48d8b7e85ab;hb=cf2c3c16d9bd46007c475cef6c5b2bc91958e0c4;hp=5339253b28addd7d1b50d1c116558d33e2d362a8;hpb=526e70c05f9132dc0a15af67943d2ecf9120660e;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/symfile.h b/gdb/symfile.h index 5339253b28..eb5beaa673 100644 --- a/gdb/symfile.h +++ b/gdb/symfile.h @@ -1,13 +1,14 @@ /* Definitions for reading symbol files into GDB. - Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, - 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc. + Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, + 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009, 2010, 2011 + 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 + the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, @@ -16,21 +17,26 @@ 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. */ + 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 section_table; +struct target_section; struct objfile; +struct obj_section; struct obstack; struct block; +/* Comparison function for symbol look ups. */ + +typedef int (symbol_compare_ftype) (const char *string1, + const char *string2); + /* 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 @@ -74,15 +80,220 @@ 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. */ + /* Sections whose names are file format dependent. */ struct other_sections { CORE_ADDR addr; char *name; + + /* SECTINDEX must be valid for associated BFD or set to -1. */ 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; +}; + +/* Callback for quick_symbol_functions->map_symbol_filenames. */ + +typedef void (symbol_filename_ftype) (const char *filename, + const char *fullname, void *data); + +/* The "quick" symbol functions exist so that symbol readers can + avoiding an initial read of all the symbols. For example, symbol + readers might choose to use the "partial symbol table" utilities, + which is one implementation of the quick symbol functions. + + The quick symbol functions are generally opaque: the underlying + representation is hidden from the caller. + + In general, these functions should only look at whatever special + index the symbol reader creates -- looking through the symbol + tables themselves is handled by generic code. If a function is + defined as returning a "symbol table", this means that the function + should only return a newly-created symbol table; it should not + examine pre-existing ones. + + The exact list of functions here was determined in an ad hoc way + based on gdb's history. */ + +struct quick_symbol_functions +{ + /* Return true if this objfile has any "partial" symbols + available. */ + int (*has_symbols) (struct objfile *objfile); + + /* Return the symbol table for the "last" file appearing in + OBJFILE. */ + struct symtab *(*find_last_source_symtab) (struct objfile *objfile); + + /* Forget all cached full file names for OBJFILE. */ + void (*forget_cached_source_info) (struct objfile *objfile); + + /* Look up the symbol table, in OBJFILE, of a source file named + NAME. If there is no '/' in the name, a match after a '/' in the + symbol table's file name will also work. FULL_PATH is the + absolute file name, and REAL_PATH is the same, run through + gdb_realpath. + + If no such symbol table can be found, returns 0. + + Otherwise, sets *RESULT to the symbol table and returns 1. This + might return 1 and set *RESULT to NULL if the requested file is + an include file that does not have a symtab of its own. */ + int (*lookup_symtab) (struct objfile *objfile, + const char *name, + const char *full_path, + const char *real_path, + struct symtab **result); + + /* Check to see if the symbol is defined in a "partial" symbol table + of OBJFILE. KIND should be either GLOBAL_BLOCK or STATIC_BLOCK, + depending on whether we want to search global symbols or static + symbols. NAME is the name of the symbol to look for. DOMAIN + indicates what sort of symbol to search for. + + Returns the newly-expanded symbol table in which the symbol is + defined, or NULL if no such symbol table exists. */ + struct symtab *(*lookup_symbol) (struct objfile *objfile, + int kind, const char *name, + domain_enum domain); + + /* This is called to expand symbol tables before looking up a + symbol. A backend can choose to implement this and then have its + `lookup_symbol' hook always return NULL, or the reverse. (It + doesn't make sense to implement both.) The arguments are as for + `lookup_symbol'. */ + void (*pre_expand_symtabs_matching) (struct objfile *objfile, + enum block_enum block_kind, + const char *name, + domain_enum domain); + + /* Print statistics about any indices loaded for OBJFILE. The + statistics should be printed to gdb_stdout. This is used for + "maint print statistics". */ + void (*print_stats) (struct objfile *objfile); + + /* Dump any indices loaded for OBJFILE. The dump should go to + gdb_stdout. This is used for "maint print objfiles". */ + void (*dump) (struct objfile *objfile); + + /* This is called by objfile_relocate to relocate any indices loaded + for OBJFILE. */ + void (*relocate) (struct objfile *objfile, + struct section_offsets *new_offsets, + struct section_offsets *delta); + + /* Find all the symbols in OBJFILE named FUNC_NAME, and ensure that + the corresponding symbol tables are loaded. */ + void (*expand_symtabs_for_function) (struct objfile *objfile, + const char *func_name); + + /* Read all symbol tables associated with OBJFILE. */ + void (*expand_all_symtabs) (struct objfile *objfile); + + /* Read all symbol tables associated with OBJFILE which have the + file name FILENAME. + This is for the purposes of examining code only, e.g., expand_line_sal. + The routine may ignore debug info that is known to not be useful with + code, e.g., DW_TAG_type_unit for dwarf debug info. */ + void (*expand_symtabs_with_filename) (struct objfile *objfile, + const char *filename); + + /* Return the file name of the file holding the symbol in OBJFILE + named NAME. If no such symbol exists in OBJFILE, return NULL. */ + const char *(*find_symbol_file) (struct objfile *objfile, const char *name); + + /* Find global or static symbols in all tables that are in NAMESPACE + and for which MATCH (symbol name, NAME) == 0, passing each to + CALLBACK, reading in partial symbol symbol tables as needed. Look + through global symbols if GLOBAL and otherwise static symbols. + Passes NAME, NAMESPACE, and DATA to CALLBACK with each symbol + found. After each block is processed, passes NULL to CALLBACK. + MATCH must be weaker than strcmp_iw in the sense that + strcmp_iw(x,y) == 0 --> MATCH(x,y) == 0. ORDERED_COMPARE, if + non-null, must be an ordering relation compatible with strcmp_iw + in the sense that + strcmp(x,y) == 0 --> ORDERED_COMPARE(x,y) == 0 + and + strcmp(x,y) <= 0 --> ORDERED_COMPARE(x,y) <= 0 + (allowing strcmp(x,y) < 0 while ORDERED_COMPARE(x, y) == 0). + CALLBACK returns 0 to indicate that the scan should continue, or + non-zero to indicate that the scan should be terminated. */ + + void (*map_matching_symbols) (const char *name, domain_enum namespace, + struct objfile *, int global, + int (*callback) (struct block *, + struct symbol *, void *), + void *data, + symbol_compare_ftype *match, + symbol_compare_ftype *ordered_compare); + + /* Expand all symbol tables in OBJFILE matching some criteria. + + FILE_MATCHER is called for each file in OBJFILE. The file name + and the DATA argument are passed to it. If it returns zero, this + file is skipped. If FILE_MATCHER is NULL such file is not skipped. + + Otherwise, if KIND does not match this symbol is skipped. + + If even KIND matches, then NAME_MATCHER is called for each symbol defined + in the file. The symbol's "natural" name and DATA are passed to + NAME_MATCHER. + + If NAME_MATCHER returns zero, then this symbol is skipped. + + Otherwise, this symbol's symbol table is expanded. + + DATA is user data that is passed unmodified to the callback + functions. */ + void (*expand_symtabs_matching) (struct objfile *objfile, + int (*file_matcher) (const char *, void *), + int (*name_matcher) (const char *, void *), + enum search_domain kind, + void *data); + + /* Return the symbol table from OBJFILE that contains PC and + SECTION. Return NULL if there is no such symbol table. This + should return the symbol table that contains a symbol whose + address exactly matches PC, or, if there is no exact match, the + symbol table that contains a symbol whose address is closest to + PC. */ + struct symtab *(*find_pc_sect_symtab) (struct objfile *objfile, + struct minimal_symbol *msymbol, + CORE_ADDR pc, + struct obj_section *section, + int warn_if_readin); + + /* Call a callback for every file defined in OBJFILE whose symtab is + not already read in. FUN is the callback. It is passed the file's + FILENAME, the file's FULLNAME, and the DATA passed to this function. */ + void (*map_symbol_filenames) (struct objfile *objfile, + symbol_filename_ftype *fun, void *data); +}; + /* Structure to keep track of symbol reading functions for various object file types. */ @@ -106,14 +317,20 @@ struct sym_fns void (*sym_init) (struct objfile *); - /* sym_read (objfile, mainline) Reads a symbol file into a psymtab + /* 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. 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. */ + file we are reading. SYMFILE_FLAGS are the flags passed to + symbol_file_add & co. */ void (*sym_read) (struct objfile *, int); + /* Read the partial symbols for an objfile. This may be NULL, in which case + gdb has to check other ways if this objfile has any symbols. This may + only be non-NULL if the objfile actually does have debuginfo available. + */ + + void (*sym_read_psymbols) (struct objfile *); + /* Called when we are finished with an objfile. Should do all cleanup that is specific to the object file format for the particular objfile. */ @@ -129,64 +346,96 @@ struct sym_fns 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. */ + /* 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. */ - struct sym_fns *next; + struct symfile_segment_data *(*sym_segments) (bfd *abfd); + /* 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); + + /* Relocate the contents of a debug section SECTP. The + contents are stored in BUF if it is non-NULL, or returned in a + malloc'd buffer otherwise. */ + + bfd_byte *(*sym_relocate) (struct objfile *, asection *sectp, bfd_byte *buf); + + /* The "quick" (aka partial) symbol functions for this symbol + reader. */ + const struct quick_symbol_functions *qf; }; +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 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, domain_enum, enum address_class, - struct psymbol_allocation_list *, long, - CORE_ADDR, enum language, struct objfile *); +extern struct symfile_segment_data *default_symfile_segments (bfd *abfd); -extern void add_psymbol_with_dem_name_to_list (char *, int, char *, int, - domain_enum, - enum address_class, - struct psymbol_allocation_list - *, long, CORE_ADDR, - enum language, - struct objfile *); +/* The default version of sym_fns.sym_relocate for readers that don't + do anything special. */ +extern bfd_byte *default_symfile_relocate (struct objfile *objfile, + asection *sectp, bfd_byte *buf); -extern void init_psymbol_list (struct objfile *, int); +extern struct symtab *allocate_symtab (const char *, struct objfile *); -extern void sort_pst_symbols (struct partial_symtab *); +extern void add_symtab_fns (const struct sym_fns *); -extern struct symtab *allocate_symtab (char *, struct objfile *); +/* This enum encodes bit-flags passed as ADD_FLAGS parameter to + syms_from_objfile, symbol_file_add, etc. */ -extern int free_named_symtabs (char *); +enum symfile_add_flags + { + /* Be chatty about what you are doing. */ + SYMFILE_VERBOSE = 1 << 1, -extern void fill_in_vptr_fieldno (struct type *); + /* This is the main symbol file (as opposed to symbol file for dynamically + loaded code). */ + SYMFILE_MAINLINE = 1 << 2, -extern void add_symtab_fns (struct sym_fns *); + /* Do not call breakpoint_re_set when adding this symbol file. */ + SYMFILE_DEFER_BP_RESET = 1 << 3, -extern void init_entry_point_info (struct objfile *); + /* Do not immediately read symbols for this file. By default, + symbols are read when the objfile is created. */ + SYMFILE_NO_READ = 1 << 4 + }; extern void syms_from_objfile (struct objfile *, struct section_addr_info *, - struct section_offsets *, int, int, int); + struct section_offsets *, int, int); -extern void new_symfile_objfile (struct objfile *, int, int); +extern void new_symfile_objfile (struct objfile *, int); extern struct objfile *symbol_file_add (char *, int, - struct section_addr_info *, int, int); + struct section_addr_info *, int); + +extern struct objfile *symbol_file_add_from_bfd (bfd *, int, + struct section_addr_info *, + int, struct objfile *parent); + +extern void symbol_file_add_separate (bfd *, int, struct objfile *); + +extern char *find_separate_debug_file_by_debuglink (struct objfile *); /* Create a new section_addr_info, with room for NUM_SECTIONS. */ @@ -197,9 +446,9 @@ extern struct section_addr_info *alloc_section_addr_info (size_t existing section table. */ extern struct section_addr_info - *build_section_addr_info_from_section_table (const struct section_table + *build_section_addr_info_from_section_table (const struct target_section *start, - const struct section_table + const struct target_section *end); /* Free all memory allocated by @@ -208,23 +457,18 @@ extern struct section_addr_info 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 **); - /* 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 symbol_obstack. */ +/* Concatenate NULL terminated variable argument list of `const char + *' strings; return the new string. Space is found in the OBSTACKP. + Argument list must be terminated by a sentinel expression `(char *) + NULL'. */ -extern char *obconcat (struct obstack *obstackp, const char *, const char *, - const char *); +extern char *obconcat (struct obstack *obstackp, ...) ATTRIBUTE_SENTINEL; /* Variables */ @@ -240,27 +484,16 @@ extern char *obconcat (struct obstack *obstackp, const char *, const char *, 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 set_initial_language (void); extern void find_lowest_section (bfd *, asection *, void *); extern bfd *symfile_bfd_open (char *); +extern bfd *bfd_open_maybe_remote (const char *); + extern int get_section_index (struct objfile *, char *); /* Utility functions for overlay sections: */ @@ -273,32 +506,32 @@ extern enum overlay_debugging_state extern int overlay_cache_invalid; /* Return the "mapped" overlay section containing the PC. */ -extern asection *find_pc_mapped_section (CORE_ADDR); +extern struct obj_section *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); +extern struct obj_section *find_pc_overlay (CORE_ADDR); /* Return true if the section is an overlay. */ -extern int section_is_overlay (asection *); +extern int section_is_overlay (struct obj_section *); /* Return true if the overlay section is currently "mapped". */ -extern int section_is_mapped (asection *); +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, asection *); +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, asection *); +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, asection *); +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, asection *); +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, asection *); +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); @@ -306,21 +539,78 @@ extern void symbol_file_add_main (char *args, int from_tty); /* Clear GDB symbol tables. */ extern void symbol_file_clear (int from_tty); -extern bfd_byte *symfile_relocate_debug_section (bfd *abfd, asection *sectp, - bfd_byte * buf); +/* Default overlay update function. */ +extern void simple_overlay_update (struct obj_section *); -/* From dwarfread.c */ +extern bfd_byte *symfile_relocate_debug_section (struct objfile *, asection *, + bfd_byte *); -extern void dwarf_build_psymtabs (struct objfile *, int, file_ptr, - unsigned int, file_ptr, unsigned int); +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); + +extern struct cleanup *increment_reading_symtab (void); /* From dwarf2read.c */ -extern int dwarf2_has_info (bfd *abfd); +/* Names for a dwarf2 debugging section. The field NORMAL is the normal + section name (usually from the DWARF standard), while the field COMPRESSED + is the name of compressed sections. If your object file format doesn't + support compressed sections, the field COMPRESSED can be NULL. Likewise, + the debugging section is not supported, the field NORMAL can be NULL too. + It doesn't make sense to have a NULL NORMAL field but a non-NULL COMPRESSED + field. */ + +struct dwarf2_section_names { + const char *normal; + const char *compressed; +}; + +/* List of names for dward2 debugging sections. Also most object file formats + use the standardized (ie ELF) names, some (eg XCOFF) have customized names + due to restrictions. + The table for the standard names is defined in dwarf2read.c. Please + update all instances of dwarf2_debug_sections if you add a field to this + structure. It is always safe to use { NULL, NULL } in this case. */ + +struct dwarf2_debug_sections { + struct dwarf2_section_names info; + struct dwarf2_section_names abbrev; + struct dwarf2_section_names line; + struct dwarf2_section_names loc; + struct dwarf2_section_names macinfo; + struct dwarf2_section_names macro; + struct dwarf2_section_names str; + struct dwarf2_section_names ranges; + struct dwarf2_section_names types; + struct dwarf2_section_names frame; + struct dwarf2_section_names eh_frame; + struct dwarf2_section_names gdb_index; +}; + +extern int dwarf2_has_info (struct objfile *, + const struct dwarf2_debug_sections *); + +/* Dwarf2 sections that can be accessed by dwarf2_get_section_info. */ +enum dwarf2_section_enum { + DWARF2_DEBUG_FRAME, + DWARF2_EH_FRAME +}; + +extern void dwarf2_get_section_info (struct objfile *, + enum dwarf2_section_enum, + asection **, gdb_byte **, + bfd_size_type *); -extern void dwarf2_build_psymtabs (struct objfile *, int); +extern int dwarf2_initialize_objfile (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. */