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c256e17165
All uses updated. (add_symtab_fns): Update prototype. * symfile.c (sym_fns_ptr): Delete. Replace with ... (registered_sym_fns): ... this. (symtab_fns): Update. (add_symtab_fns): New arg "flavour". All callers updated. (find_sym_fns): Rewrite to use new sym_fns registry.
667 lines
25 KiB
C
667 lines
25 KiB
C
/* Definitions for reading symbol files into GDB.
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Copyright (C) 1990-2013 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#if !defined (SYMFILE_H)
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#define SYMFILE_H
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/* This file requires that you first include "bfd.h". */
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#include "symtab.h"
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#include "probe.h"
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/* Opaque declarations. */
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struct target_section;
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struct objfile;
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struct obj_section;
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struct obstack;
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struct block;
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struct probe;
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struct value;
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struct frame_info;
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struct agent_expr;
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struct axs_value;
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/* Comparison function for symbol look ups. */
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typedef int (symbol_compare_ftype) (const char *string1,
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const char *string2);
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/* Partial symbols are stored in the psymbol_cache and pointers to
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them are kept in a dynamically grown array that is obtained from
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malloc and grown as necessary via realloc. Each objfile typically
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has two of these, one for global symbols and one for static
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symbols. Although this adds a level of indirection for storing or
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accessing the partial symbols, it allows us to throw away duplicate
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psymbols and set all pointers to the single saved instance. */
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struct psymbol_allocation_list
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{
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/* Pointer to beginning of dynamically allocated array of pointers
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to partial symbols. The array is dynamically expanded as
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necessary to accommodate more pointers. */
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struct partial_symbol **list;
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/* Pointer to next available slot in which to store a pointer to a
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partial symbol. */
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struct partial_symbol **next;
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/* Number of allocated pointer slots in current dynamic array (not
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the number of bytes of storage). The "next" pointer will always
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point somewhere between list[0] and list[size], and when at
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list[size] the array will be expanded on the next attempt to
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store a pointer. */
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int size;
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};
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/* Define an array of addresses to accommodate non-contiguous dynamic
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loading of modules. This is for use when entering commands, so we
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can keep track of the section names until we read the file and can
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map them to bfd sections. This structure is also used by solib.c
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to communicate the section addresses in shared objects to
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symbol_file_add (). */
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struct section_addr_info
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{
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/* The number of sections for which address information is
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available. */
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size_t num_sections;
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/* Sections whose names are file format dependent. */
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struct other_sections
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{
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CORE_ADDR addr;
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char *name;
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/* SECTINDEX must be valid for associated BFD or set to -1. */
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int sectindex;
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} other[1];
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};
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/* A table listing the load segments in a symfile, and which segment
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each BFD section belongs to. */
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struct symfile_segment_data
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{
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/* How many segments are present in this file. If there are
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two, the text segment is the first one and the data segment
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is the second one. */
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int num_segments;
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/* If NUM_SEGMENTS is greater than zero, the original base address
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of each segment. */
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CORE_ADDR *segment_bases;
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/* If NUM_SEGMENTS is greater than zero, the memory size of each
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segment. */
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CORE_ADDR *segment_sizes;
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/* If NUM_SEGMENTS is greater than zero, this is an array of entries
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recording which segment contains each BFD section.
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SEGMENT_INFO[I] is S+1 if the I'th BFD section belongs to segment
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S, or zero if it is not in any segment. */
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int *segment_info;
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};
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/* Callback for quick_symbol_functions->map_symbol_filenames. */
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typedef void (symbol_filename_ftype) (const char *filename,
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const char *fullname, void *data);
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/* The "quick" symbol functions exist so that symbol readers can
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avoiding an initial read of all the symbols. For example, symbol
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readers might choose to use the "partial symbol table" utilities,
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which is one implementation of the quick symbol functions.
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The quick symbol functions are generally opaque: the underlying
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representation is hidden from the caller.
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In general, these functions should only look at whatever special
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index the symbol reader creates -- looking through the symbol
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tables themselves is handled by generic code. If a function is
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defined as returning a "symbol table", this means that the function
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should only return a newly-created symbol table; it should not
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examine pre-existing ones.
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The exact list of functions here was determined in an ad hoc way
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based on gdb's history. */
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struct quick_symbol_functions
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{
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/* Return true if this objfile has any "partial" symbols
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available. */
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int (*has_symbols) (struct objfile *objfile);
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/* Return the symbol table for the "last" file appearing in
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OBJFILE. */
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struct symtab *(*find_last_source_symtab) (struct objfile *objfile);
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/* Forget all cached full file names for OBJFILE. */
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void (*forget_cached_source_info) (struct objfile *objfile);
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/* Expand and iterate over each "partial" symbol table in OBJFILE
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where the source file is named NAME.
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If NAME is not absolute, a match after a '/' in the symbol table's
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file name will also work, REAL_PATH is NULL then. If NAME is
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absolute then REAL_PATH is non-NULL absolute file name as resolved
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via gdb_realpath from NAME.
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If a match is found, the "partial" symbol table is expanded.
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Then, this calls iterate_over_some_symtabs (or equivalent) over
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all newly-created symbol tables, passing CALLBACK and DATA to it.
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The result of this call is returned. */
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int (*map_symtabs_matching_filename) (struct objfile *objfile,
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const char *name,
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const char *real_path,
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int (*callback) (struct symtab *,
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void *),
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void *data);
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/* Check to see if the symbol is defined in a "partial" symbol table
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of OBJFILE. KIND should be either GLOBAL_BLOCK or STATIC_BLOCK,
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depending on whether we want to search global symbols or static
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symbols. NAME is the name of the symbol to look for. DOMAIN
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indicates what sort of symbol to search for.
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Returns the newly-expanded symbol table in which the symbol is
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defined, or NULL if no such symbol table exists. If OBJFILE
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contains !TYPE_OPAQUE symbol prefer its symtab. If it contains
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only TYPE_OPAQUE symbol(s), return at least that symtab. */
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struct symtab *(*lookup_symbol) (struct objfile *objfile,
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int kind, const char *name,
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domain_enum domain);
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/* Print statistics about any indices loaded for OBJFILE. The
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statistics should be printed to gdb_stdout. This is used for
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"maint print statistics". */
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void (*print_stats) (struct objfile *objfile);
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/* Dump any indices loaded for OBJFILE. The dump should go to
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gdb_stdout. This is used for "maint print objfiles". */
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void (*dump) (struct objfile *objfile);
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/* This is called by objfile_relocate to relocate any indices loaded
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for OBJFILE. */
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void (*relocate) (struct objfile *objfile,
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const struct section_offsets *new_offsets,
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const struct section_offsets *delta);
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/* Find all the symbols in OBJFILE named FUNC_NAME, and ensure that
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the corresponding symbol tables are loaded. */
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void (*expand_symtabs_for_function) (struct objfile *objfile,
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const char *func_name);
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/* Read all symbol tables associated with OBJFILE. */
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void (*expand_all_symtabs) (struct objfile *objfile);
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/* Read all symbol tables associated with OBJFILE which have
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symtab_to_fullname equal to FULLNAME.
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This is for the purposes of examining code only, e.g., expand_line_sal.
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The routine may ignore debug info that is known to not be useful with
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code, e.g., DW_TAG_type_unit for dwarf debug info. */
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void (*expand_symtabs_with_fullname) (struct objfile *objfile,
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const char *fullname);
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/* Find global or static symbols in all tables that are in NAMESPACE
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and for which MATCH (symbol name, NAME) == 0, passing each to
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CALLBACK, reading in partial symbol tables as needed. Look
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through global symbols if GLOBAL and otherwise static symbols.
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Passes NAME, NAMESPACE, and DATA to CALLBACK with each symbol
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found. After each block is processed, passes NULL to CALLBACK.
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MATCH must be weaker than strcmp_iw_ordered in the sense that
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strcmp_iw_ordered(x,y) == 0 --> MATCH(x,y) == 0. ORDERED_COMPARE,
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if non-null, must be an ordering relation compatible with
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strcmp_iw_ordered in the sense that
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strcmp_iw_ordered(x,y) == 0 --> ORDERED_COMPARE(x,y) == 0
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and
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strcmp_iw_ordered(x,y) <= 0 --> ORDERED_COMPARE(x,y) <= 0
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(allowing strcmp_iw_ordered(x,y) < 0 while ORDERED_COMPARE(x, y) == 0).
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CALLBACK returns 0 to indicate that the scan should continue, or
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non-zero to indicate that the scan should be terminated. */
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void (*map_matching_symbols) (struct objfile *,
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const char *name, domain_enum namespace,
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int global,
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int (*callback) (struct block *,
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struct symbol *, void *),
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void *data,
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symbol_compare_ftype *match,
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symbol_compare_ftype *ordered_compare);
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/* Expand all symbol tables in OBJFILE matching some criteria.
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FILE_MATCHER is called for each file in OBJFILE. The file name
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and the DATA argument are passed to it. If it returns zero, this
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file is skipped. If FILE_MATCHER is NULL such file is not skipped.
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If BASENAMES is non-zero the function should consider only base name of
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DATA (passed file name is already only the lbasename part).
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Otherwise, if KIND does not match this symbol is skipped.
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If even KIND matches, then NAME_MATCHER is called for each symbol
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defined in the file. The symbol "search" name and DATA are passed
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to NAME_MATCHER.
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If NAME_MATCHER returns zero, then this symbol is skipped.
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Otherwise, this symbol's symbol table is expanded.
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DATA is user data that is passed unmodified to the callback
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functions. */
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void (*expand_symtabs_matching)
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(struct objfile *objfile,
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int (*file_matcher) (const char *, void *, int basenames),
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int (*name_matcher) (const char *, void *),
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enum search_domain kind,
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void *data);
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/* Return the symbol table from OBJFILE that contains PC and
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SECTION. Return NULL if there is no such symbol table. This
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should return the symbol table that contains a symbol whose
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address exactly matches PC, or, if there is no exact match, the
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symbol table that contains a symbol whose address is closest to
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PC. */
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struct symtab *(*find_pc_sect_symtab) (struct objfile *objfile,
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struct minimal_symbol *msymbol,
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CORE_ADDR pc,
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struct obj_section *section,
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int warn_if_readin);
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/* Call a callback for every file defined in OBJFILE whose symtab is
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not already read in. FUN is the callback. It is passed the file's
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FILENAME, the file's FULLNAME (if need_fullname is non-zero), and
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the DATA passed to this function. */
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void (*map_symbol_filenames) (struct objfile *objfile,
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symbol_filename_ftype *fun, void *data,
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int need_fullname);
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};
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/* Structure of functions used for probe support. If one of these functions
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is provided, all must be. */
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struct sym_probe_fns
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{
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/* If non-NULL, return an array of probe objects.
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The returned value does not have to be freed and it has lifetime of the
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OBJFILE. */
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VEC (probe_p) *(*sym_get_probes) (struct objfile *);
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/* Return the number of arguments available to PROBE. PROBE will
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have come from a call to this objfile's sym_get_probes method.
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If you provide an implementation of sym_get_probes, you must
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implement this method as well. */
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unsigned (*sym_get_probe_argument_count) (struct probe *probe);
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/* Return 1 if the probe interface can evaluate the arguments of probe
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PROBE, zero otherwise. This function can be probe-specific, informing
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whether only the arguments of PROBE can be evaluated, of generic,
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informing whether the probe interface is able to evaluate any kind of
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argument. If you provide an implementation of sym_get_probes, you must
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implement this method as well. */
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int (*can_evaluate_probe_arguments) (struct probe *probe);
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/* Evaluate the Nth argument available to PROBE. PROBE will have
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come from a call to this objfile's sym_get_probes method. N will
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be between 0 and the number of arguments available to this probe.
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FRAME is the frame in which the evaluation is done; the frame's
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PC will match the address of the probe. If you provide an
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implementation of sym_get_probes, you must implement this method
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as well. */
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struct value *(*sym_evaluate_probe_argument) (struct probe *probe,
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unsigned n);
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/* Compile the Nth probe argument to an agent expression. PROBE
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will have come from a call to this objfile's sym_get_probes
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method. N will be between 0 and the number of arguments
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available to this probe. EXPR and VALUE are the agent expression
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that is being updated. */
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void (*sym_compile_to_ax) (struct probe *probe,
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struct agent_expr *expr,
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struct axs_value *value,
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unsigned n);
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/* Relocate the probe section of OBJFILE. */
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void (*sym_relocate_probe) (struct objfile *objfile,
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const struct section_offsets *new_offsets,
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const struct section_offsets *delta);
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};
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/* Structure to keep track of symbol reading functions for various
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object file types. */
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struct sym_fns
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{
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/* Initializes anything that is global to the entire symbol table.
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It is called during symbol_file_add, when we begin debugging an
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entirely new program. */
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void (*sym_new_init) (struct objfile *);
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/* Reads any initial information from a symbol file, and initializes
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the struct sym_fns SF in preparation for sym_read(). It is
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called every time we read a symbol file for any reason. */
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void (*sym_init) (struct objfile *);
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/* sym_read (objfile, symfile_flags) Reads a symbol file into a psymtab
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(or possibly a symtab). OBJFILE is the objfile struct for the
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file we are reading. SYMFILE_FLAGS are the flags passed to
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symbol_file_add & co. */
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void (*sym_read) (struct objfile *, int);
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/* Read the partial symbols for an objfile. This may be NULL, in which case
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gdb has to check other ways if this objfile has any symbols. This may
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only be non-NULL if the objfile actually does have debuginfo available.
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*/
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void (*sym_read_psymbols) (struct objfile *);
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/* Called when we are finished with an objfile. Should do all
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cleanup that is specific to the object file format for the
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particular objfile. */
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void (*sym_finish) (struct objfile *);
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/* This function produces a file-dependent section_offsets
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structure, allocated in the objfile's storage, and based on the
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parameter. The parameter is currently a CORE_ADDR (FIXME!) for
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backward compatibility with the higher levels of GDB. It should
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probably be changed to a string, where NULL means the default,
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and others are parsed in a file dependent way. */
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void (*sym_offsets) (struct objfile *, const struct section_addr_info *);
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/* This function produces a format-independent description of
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the segments of ABFD. Each segment is a unit of the file
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which may be relocated independently. */
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struct symfile_segment_data *(*sym_segments) (bfd *abfd);
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/* This function should read the linetable from the objfile when
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the line table cannot be read while processing the debugging
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information. */
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void (*sym_read_linetable) (struct objfile *);
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/* Relocate the contents of a debug section SECTP. The
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contents are stored in BUF if it is non-NULL, or returned in a
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malloc'd buffer otherwise. */
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bfd_byte *(*sym_relocate) (struct objfile *, asection *sectp, bfd_byte *buf);
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/* If non-NULL, this objfile has probe support, and all the probe
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functions referred to here will be non-NULL. */
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const struct sym_probe_fns *sym_probe_fns;
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/* The "quick" (aka partial) symbol functions for this symbol
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reader. */
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const struct quick_symbol_functions *qf;
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};
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extern struct section_addr_info *
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build_section_addr_info_from_objfile (const struct objfile *objfile);
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extern void relative_addr_info_to_section_offsets
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(struct section_offsets *section_offsets, int num_sections,
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const struct section_addr_info *addrs);
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extern void addr_info_make_relative (struct section_addr_info *addrs,
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bfd *abfd);
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/* The default version of sym_fns.sym_offsets for readers that don't
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do anything special. */
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extern void default_symfile_offsets (struct objfile *objfile,
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const struct section_addr_info *);
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/* The default version of sym_fns.sym_segments for readers that don't
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do anything special. */
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extern struct symfile_segment_data *default_symfile_segments (bfd *abfd);
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/* The default version of sym_fns.sym_relocate for readers that don't
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do anything special. */
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extern bfd_byte *default_symfile_relocate (struct objfile *objfile,
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asection *sectp, bfd_byte *buf);
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extern struct symtab *allocate_symtab (const char *, struct objfile *)
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ATTRIBUTE_NONNULL (1);
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extern void add_symtab_fns (enum bfd_flavour flavour, const struct sym_fns *);
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/* This enum encodes bit-flags passed as ADD_FLAGS parameter to
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symbol_file_add, etc. */
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enum symfile_add_flags
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{
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/* Be chatty about what you are doing. */
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SYMFILE_VERBOSE = 1 << 1,
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/* This is the main symbol file (as opposed to symbol file for dynamically
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loaded code). */
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SYMFILE_MAINLINE = 1 << 2,
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/* Do not call breakpoint_re_set when adding this symbol file. */
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SYMFILE_DEFER_BP_RESET = 1 << 3,
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/* Do not immediately read symbols for this file. By default,
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symbols are read when the objfile is created. */
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SYMFILE_NO_READ = 1 << 4
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};
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extern void new_symfile_objfile (struct objfile *, int);
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extern struct objfile *symbol_file_add (const char *, int,
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struct section_addr_info *, int);
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extern struct objfile *symbol_file_add_from_bfd (bfd *, const char *, int,
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struct section_addr_info *,
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int, struct objfile *parent);
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extern void symbol_file_add_separate (bfd *, const char *, int,
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struct objfile *);
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extern char *find_separate_debug_file_by_debuglink (struct objfile *);
|
|
|
|
/* 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 *);
|
|
|
|
|
|
/* 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;
|
|
|
|
/* From symfile.c */
|
|
|
|
extern void set_initial_language (void);
|
|
|
|
extern void find_lowest_section (bfd *, asection *, void *);
|
|
|
|
extern bfd *symfile_bfd_open (const char *);
|
|
|
|
extern bfd *gdb_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 *);
|
|
|
|
/* 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 (const 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 (struct objfile *, asection *,
|
|
bfd_byte *);
|
|
|
|
extern int symfile_map_offsets_to_segments (bfd *,
|
|
const 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 */
|
|
|
|
/* 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 addr;
|
|
struct dwarf2_section_names frame;
|
|
struct dwarf2_section_names eh_frame;
|
|
struct dwarf2_section_names gdb_index;
|
|
/* This field has no meaning, but exists solely to catch changes to
|
|
this structure which are not reflected in some instance. */
|
|
int sentinel;
|
|
};
|
|
|
|
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 **, const gdb_byte **,
|
|
bfd_size_type *);
|
|
|
|
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 */
|
|
|
|
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 *);
|
|
|
|
/* From minidebug.c. */
|
|
|
|
extern bfd *find_separate_debug_file_in_section (struct objfile *);
|
|
|
|
#endif /* !defined(SYMFILE_H) */
|