/* Definitions for reading symbol files into GDB.
- Copyright (C) 1990, 1991, 1992, 1993, 1994, 1996
+
+ Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
+ 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009
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,
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 <http://www.gnu.org/licenses/>. */
#if !defined (SYMFILE_H)
#define SYMFILE_H
/* This file requires that you first include "bfd.h". */
-
-/* Partial symbols are stored in the psymbol_cache and pointers to them
- are kept in a dynamically grown array that is obtained from malloc and
- grown as necessary via realloc. Each objfile typically has two of these,
- one for global symbols and one for static symbols. Although this adds
- a level of indirection for storing or accessing the partial symbols,
- it allows us to throw away duplicate psymbols and set all pointers
- to the single saved instance. */
+#include "symtab.h"
+
+/* Opaque declarations. */
+struct section_table;
+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;
+
+ /* 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
{
-
- /* 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;
- };
+ 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
- {
+{
+
+ /* BFD flavour that we handle, or (as a special kludge, see
+ xcoffread.c, (enum bfd_flavour)-1 for xcoff). */
- /* BFD flavour that we handle, or (as a special kludge, see xcoffread.c,
- (enum bfd_flavour)-1 for xcoff). */
+ enum bfd_flavour sym_flavour;
- enum bfd_flavour sym_flavour;
+ /* Initializes anything that is global to the entire symbol table.
+ It is called during symbol_file_add, when we begin debugging an
+ entirely new program. */
- /* Initializes anything that is global to the entire symbol table. It is
- called during symbol_file_add, when we begin debugging an entirely new
- program. */
+ void (*sym_new_init) (struct objfile *);
- void (*sym_new_init) PARAMS ((struct objfile *));
+ /* Reads any initial information from a symbol file, and initializes
+ the struct sym_fns SF in preparation for sym_read(). It is
+ called every time we read a symbol file for any reason. */
- /* Reads any initial information from a symbol file, and initializes the
- struct sym_fns SF in preparation for sym_read(). It is called every
- time we read a symbol file for any reason. */
+ void (*sym_init) (struct objfile *);
- void (*sym_init) PARAMS ((struct objfile *));
+ /* 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. */
- /* 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_read) (struct objfile *, int);
- void (*sym_read) PARAMS ((struct objfile *, int));
+ /* Called when we are finished with an objfile. Should do all
+ cleanup that is specific to the object file format for the
+ particular objfile. */
- /* Called when we are finished with an objfile. Should do all cleanup
- that is specific to the object file format for the particular objfile. */
+ void (*sym_finish) (struct objfile *);
- void (*sym_finish) PARAMS ((struct objfile *));
+ /* This function produces a file-dependent section_offsets
+ structure, allocated in the objfile's storage, and based on the
+ parameter. The parameter is currently a CORE_ADDR (FIXME!) for
+ backward compatibility with the higher levels of GDB. It should
+ probably be changed to a string, where NULL means the default,
+ and others are parsed in a file dependent way. */
- /* 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_offsets) (struct objfile *, struct section_addr_info *);
- void (*sym_offsets) PARAMS ((struct objfile *, struct section_addr_info *));
+ /* 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. */
- /* 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 symfile_segment_data *(*sym_segments) (bfd *abfd);
- struct sym_fns *next;
+ /* 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);
- };
+ /* Finds the next struct sym_fns. They are allocated and
+ initialized in whatever module implements the functions pointed
+ to; an initializer calls add_symtab_fns to add them to the global
+ chain. */
+
+ struct sym_fns *next;
+
+};
/* The default version of sym_fns.sym_offsets for readers that don't
do anything special. */
-extern void
-default_symfile_offsets PARAMS ((struct objfile * objfile, struct section_addr_info *));
+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 PARAMS ((struct psymbol_allocation_list *,
- struct objfile *));
+extern void extend_psymbol_list (struct psymbol_allocation_list *,
+ struct objfile *);
-/* Add any kind of symbol to a psymbol_allocation_list. */
+/* 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 const
+struct partial_symbol *add_psymbol_to_list (char *, int, domain_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 (struct objfile *, int);
+extern void sort_pst_symbols (struct partial_symtab *);
-extern void init_psymbol_list PARAMS ((struct objfile *, int));
+extern struct symtab *allocate_symtab (char *, struct objfile *);
-extern void
-sort_pst_symbols PARAMS ((struct partial_symtab *));
+extern int free_named_symtabs (char *);
-extern struct symtab *
- allocate_symtab PARAMS ((char *, struct objfile *));
+extern void add_symtab_fns (struct sym_fns *);
-extern int
-free_named_symtabs PARAMS ((char *));
+extern void syms_from_objfile (struct objfile *,
+ struct section_addr_info *,
+ struct section_offsets *, int, int, int);
-extern void
-fill_in_vptr_fieldno PARAMS ((struct type *));
+extern void new_symfile_objfile (struct objfile *, int, int);
-extern void
-add_symtab_fns PARAMS ((struct sym_fns *));
+extern struct objfile *symbol_file_add (char *, int,
+ struct section_addr_info *, int, int);
-extern void
-init_entry_point_info PARAMS ((struct objfile *));
+extern struct objfile *symbol_file_add_from_bfd (bfd *, int,
+ struct section_addr_info *,
+ int, int);
-extern void
-syms_from_objfile PARAMS ((struct objfile *, struct section_addr_info *, int, int));
+/* Create a new section_addr_info, with room for NUM_SECTIONS. */
-extern void
-new_symfile_objfile PARAMS ((struct objfile *, int, int));
+extern struct section_addr_info *alloc_section_addr_info (size_t
+ num_sections);
-extern struct partial_symtab *
- start_psymtab_common PARAMS ((struct objfile *, struct section_offsets *,
- char *, CORE_ADDR,
- struct partial_symbol **,
- struct partial_symbol **));
+/* Return a freshly allocated copy of ADDRS. The section names, if
+ any, are also freshly allocated copies of those in ADDRS. */
+extern struct section_addr_info *(copy_section_addr_info
+ (struct section_addr_info *addrs));
-/* Sorting your symbols for fast lookup or alphabetical printing. */
+/* Build (allocate and populate) a section_addr_info struct from an
+ existing section table. */
-extern void
-sort_block_syms PARAMS ((struct block *));
+extern struct section_addr_info
+ *build_section_addr_info_from_section_table (const struct section_table
+ *start,
+ const struct section_table
+ *end);
-extern void
-sort_symtab_syms PARAMS ((struct symtab *));
+/* Free all memory allocated by
+ build_section_addr_info_from_section_table. */
-/* 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 void free_section_addr_info (struct section_addr_info *);
-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 struct partial_symtab *start_psymtab_common (struct objfile *,
+ struct section_offsets *,
+ char *, CORE_ADDR,
+ struct partial_symbol **,
+ struct partial_symbol **);
-extern char *
- obconcat PARAMS ((struct obstack * obstackp, const char *, const char *,
- const char *));
+/* 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. */
- /* Variables */
+extern char *obsavestring (const char *, int, struct obstack *);
-/* whether to auto load solibs at startup time: 0/1.
+/* Concatenate strings S1, S2 and S3; return the new string. Space is
+ found in the OBSTACKP */
- On all platforms, 0 means "don't auto load".
+extern char *obconcat (struct obstack *obstackp, const char *, const char *,
+ const char *);
+
+ /* Variables */
- 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.
+/* If non-zero, gdb will notify the user when it is loading symbols
+ from a file. This is almost always what users will want to have happen;
+ but for programs with lots of dynamically linked libraries, the output
+ can be more noise than signal. */
- On other platforms, > 0 means, "always auto load".
- */
+extern int print_symbol_loading;
+
+/* 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;
+/* 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 PARAMS ((void));
+extern void set_initial_language (void);
-extern struct partial_symtab *
- allocate_psymtab PARAMS ((char *, struct objfile *));
+extern struct partial_symtab *allocate_psymtab (char *, struct objfile *);
-extern void
-discard_psymtab PARAMS ((struct partial_symtab *));
+extern void discard_psymtab (struct partial_symtab *);
-extern void find_lowest_section PARAMS ((bfd *, asection *, PTR));
+extern void find_lowest_section (bfd *, asection *, void *);
-extern bfd *symfile_bfd_open PARAMS ((char *));
+extern bfd *symfile_bfd_open (char *);
+
+extern int get_section_index (struct objfile *, char *);
/* Utility functions for overlay sections: */
-extern int overlay_debugging;
+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 asection *
- find_pc_mapped_section PARAMS ((CORE_ADDR));
+/* 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 any overlay section containing the PC (even in its LMA region) */
-extern asection *
- find_pc_overlay PARAMS ((CORE_ADDR));
+/* Return true if the overlay section is currently "mapped". */
+extern int section_is_mapped (struct obj_section *);
-/* return true if the section is an overlay */
-extern int
-section_is_overlay PARAMS ((asection *));
+/* Return true if pc belongs to section's VMA. */
+extern CORE_ADDR pc_in_mapped_range (CORE_ADDR, struct obj_section *);
-/* return true if the overlay section is currently "mapped" */
-extern int
-section_is_mapped PARAMS ((asection *));
+/* Return true if pc belongs to section's LMA. */
+extern CORE_ADDR pc_in_unmapped_range (CORE_ADDR, struct obj_section *);
-/* return true if pc belongs to section's VMA */
-extern CORE_ADDR
- pc_in_mapped_range PARAMS ((CORE_ADDR, asection *));
+/* Map an address from a section's LMA to its VMA. */
+extern CORE_ADDR overlay_mapped_address (CORE_ADDR, struct obj_section *);
-/* 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 VMA to its LMA. */
+extern CORE_ADDR overlay_unmapped_address (CORE_ADDR, struct obj_section *);
-/* map an address from a section's LMA to its VMA */
-extern CORE_ADDR
- overlay_mapped_address PARAMS ((CORE_ADDR, asection *));
+/* Convert an address in an overlay section (force into VMA range). */
+extern CORE_ADDR symbol_overlayed_address (CORE_ADDR, struct obj_section *);
-/* map an address from a section's VMA to its LMA */
-extern CORE_ADDR
- overlay_unmapped_address PARAMS ((CORE_ADDR, asection *));
+/* Load symbols from a file. */
+extern void symbol_file_add_main (char *args, int from_tty);
-/* convert an address in an overlay section (force into VMA range) */
-extern CORE_ADDR
- symbol_overlayed_address PARAMS ((CORE_ADDR, asection *));
+/* Clear GDB symbol tables. */
+extern void symbol_file_clear (int from_tty);
-/* From dwarfread.c */
+/* Default overlay update function. */
+extern void simple_overlay_update (struct obj_section *);
-extern void
-dwarf_build_psymtabs PARAMS ((struct objfile *, int, file_ptr, unsigned int,
- file_ptr, unsigned int));
+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 PARAMS ((bfd * abfd));
+extern int dwarf2_has_info (struct objfile *);
+
+extern void dwarf2_build_psymtabs (struct objfile *, int);
+extern void dwarf2_build_frame_info (struct objfile *);
-extern void dwarf2_build_psymtabs PARAMS ((struct objfile *, int));
+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 void
-mdebug_build_psymtabs PARAMS ((struct objfile *,
- const struct ecoff_debug_swap *,
- struct ecoff_debug_info *));
-
-extern void
-elfmdebug_build_psymtabs PARAMS ((struct objfile *,
- const struct ecoff_debug_swap *,
- asection *));
+{
+ struct ecoff_debug_swap *a;
+ struct ecoff_debug_info *b;
+};
+
+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 *);
#endif /* !defined(SYMFILE_H) */
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