/* Definitions for reading symbol files into GDB.
- Copyright (C) 1990, 1991, 1992 Free Software Foundation, Inc.
+ Copyright (C) 1990, 1991, 1992, 1993, 1994, 1996
+ Free Software Foundation, Inc.
-This file is part of GDB.
+ This file is part of GDB.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
-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.
+ 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, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
#if !defined (SYMFILE_H)
#define SYMFILE_H
/* This file requires that you first include "bfd.h". */
-struct psymbol_allocation_list {
- struct partial_symbol *list;
- struct partial_symbol *next;
- int size;
-};
-
-/* Master structure for keeping track of each input file from which
- gdb reads symbols. One of these is allocated for each such file we
- access, e.g. the exec_file, symbol_file, and any shared library object
- files. */
-
-struct objfile
+/* Partial symbols are stored in the psymbol_cache and pointers to them
+ are kept in a dynamically grown array that is obtained from malloc and
+ grown as necessary via realloc. Each objfile typically has two of these,
+ one for global symbols and one for static symbols. Although this adds
+ a level of indirection for storing or accessing the partial symbols,
+ it allows us to throw away duplicate psymbols and set all pointers
+ to the single saved instance. */
+
+struct psymbol_allocation_list
+ {
+
+ /* Pointer to beginning of dynamically allocated array of pointers to
+ partial symbols. The array is dynamically expanded as necessary to
+ accommodate more pointers. */
+
+ struct partial_symbol **list;
+
+ /* Pointer to next available slot in which to store a pointer to a partial
+ symbol. */
+
+ struct partial_symbol **next;
+
+ /* Number of allocated pointer slots in current dynamic array (not the
+ number of bytes of storage). The "next" pointer will always point
+ somewhere between list[0] and list[size], and when at list[size] the
+ array will be expanded on the next attempt to store a pointer. */
+
+ int size;
+ };
+
+/* Define an array of addresses to accommodate non-contiguous dynamic
+ loading of modules. This is for use when entering commands, so we
+ can keep track of the section names until we read the file and
+ can map them to bfd sections. This structure is also used by
+ solib.c to communicate the section addresses in shared objects to
+ symbol_file_add (). */
+
+#define MAX_SECTIONS 40
+struct section_addr_info
{
-
- /* All struct objfile's are chained together by their next pointers.
- The global variable "object_files" points to the first link in this
- chain. */
-
- struct objfile *next;
-
- /* The object file's name. Malloc'd; free it if you free this struct. */
-
- char *name;
-
- /* Some flag bits for this objfile. */
-
- unsigned short flags;
-
- /* Each objfile points to a linked list of symtabs derived from this file,
- one symtab structure for each compilation unit (source file). Each link
- in the symtab list contains a backpointer to this objfile. */
-
- struct symtab *symtabs;
-
- /* Each objfile points to a linked list of partial symtabs derived from
- this file, one partial symtab structure for each compilation unit
- (source file). */
-
- struct partial_symtab *psymtabs;
-
- /* List of freed partial symtabs, available for re-use */
-
- struct partial_symtab *free_psymtabs;
-
- /* The object file's BFD. Can be null, in which case bfd_open (name) and
- put the result here. */
-
- bfd *obfd;
-
- /* The modification timestamp of the object file, as of the last time
- we read its symbols. */
-
- long mtime;
-
- /* Obstacks to hold objects that should be freed when we load a new symbol
- table from this object file. */
-
- struct obstack psymbol_obstack; /* Partial symbols */
- struct obstack symbol_obstack; /* Full symbols */
- struct obstack type_obstack; /* Types */
-
- /* Vectors of all partial symbols read in from file. The actual data
- is stored in the psymbol_obstack. */
-
- struct psymbol_allocation_list global_psymbols;
- struct psymbol_allocation_list static_psymbols;
-
- /* Each file contains a pointer to an array of minimal symbols for all
- global symbols that are defined within the file. The array is terminated
- by a "null symbol", one that has a NULL pointer for the name and a zero
- value for the address. This makes it easy to walk through the array
- when passed a pointer to somewhere in the middle of it. There is also
- a count of the number of symbols, which does include the terminating
- null symbol. The array itself, as well as all the data that it points
- to, should be allocated on the symbol_obstack for this file. */
-
- struct minimal_symbol *msymbols;
- int minimal_symbol_count;
-
- /* For object file formats which don't specify fundamental types, gdb
- can create such types. For now, it maintains a vector of pointers
- to these internally created fundamental types on a per objfile basis,
- however it really should ultimately keep them on a per-compilation-unit
- basis, to account for linkage-units that consist of a number of
- compilation units that may have different fundamental types, such as
- linking C modules with ADA modules, or linking C modules that are
- compiled with 32-bit ints with C modules that are compiled with 64-bit
- ints (not inherently evil with a smarter linker). */
-
- struct type **fundamental_types;
-
- /* The mmalloc() malloc-descriptor for this objfile if we are using
- the memory mapped malloc() package to manage storage for this objfile's
- data. NULL if we are not. */
-
- void *md;
-
+ /* Sections whose names are file format dependant. */
+ struct other_sections
+ {
+ CORE_ADDR addr;
+ char *name;
+ int sectindex;
+ } other[MAX_SECTIONS];
};
-/* Defines for the objfile flag word. */
-
-/* Gdb can arrange to allocate storage for all objects related to a
- particular objfile in a designated section of it's address space,
- managed at a low level by mmap() and using a special version of
- malloc that handles malloc/free/realloc on top of the mmap() interface.
- This allows the "internal gdb state" for a particular objfile to be
- dumped to a gdb state file and subsequently reloaded at a later time. */
-
-#define OBJF_MAPPED (1 << 0) /* Objfile data is mmap'd */
-
-
/* Structure to keep track of symbol reading functions for various
object file types. */
-struct sym_fns {
+struct sym_fns
+ {
- /* 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" or "elf". */
+ /* 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;
- /* counts how many bytes of sym_name should be checked against the
- BFD target type of the file being read. If an exact match is
- desired, specify the number of characters in sym_name plus 1 for the
- NUL. If a prefix match is desired, specify the number of characters in
- sym_name. */
+ /* Initializes anything that is global to the entire symbol table. It is
+ called during symbol_file_add, when we begin debugging an entirely new
+ program. */
- int sym_namelen;
+ void (*sym_new_init) PARAMS ((struct objfile *));
- /* 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. */
+ /* 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) PARAMS ((void));
+ void (*sym_init) PARAMS ((struct objfile *));
- /* sym_init (sf)
- reads any initial information from a symbol file, and
- initializes the struct sym_fns SF in preparation for sym_read().
- It is called every time we read a symbol file for any reason. */
+ /* sym_read (objfile, mainline)
+ Reads a symbol file into a psymtab (or possibly a symtab).
+ OBJFILE is the objfile struct for the file we are reading.
+ MAINLINE is 1 if this is the
+ main symbol table being read, and 0 if a secondary
+ symbol file (e.g. shared library or dynamically loaded file)
+ is being read. */
- void (*sym_init) PARAMS ((struct sym_fns *));
+ void (*sym_read) PARAMS ((struct objfile *, int));
- /* sym_read (sf, addr, mainline)
- reads a symbol file into a psymtab (or possibly a symtab).
- SF is the struct sym_fns that sym_init initialized. ADDR
- is the offset between the file's specified start address and
- its true address in memory. MAINLINE is 1 if this is the
- main symbol table being read, and 0 if a secondary
- symbol file (e.g. shared library or dynamically loaded file)
- is being read. */
+ /* Called when we are finished with an objfile. Should do all cleanup
+ that is specific to the object file format for the particular objfile. */
- void (*sym_read) PARAMS ((struct sym_fns *, CORE_ADDR, int));
+ void (*sym_finish) PARAMS ((struct objfile *));
- /* is the accessor for the symbol file being read. */
+ /* 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. */
- bfd *sym_bfd;
+ void (*sym_offsets) PARAMS ((struct objfile *, struct section_addr_info *));
- /* is where information can be shared among sym_init and sym_read.
- It is typically a pointer to malloc'd memory. */
+ /* 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. */
- char *sym_private; /* Should be void * */
+ struct sym_fns *next;
- /* is the "struct objfile" for the object file being read. */
+ };
- struct objfile *objfile;
+/* The default version of sym_fns.sym_offsets for readers that don't
+ do anything special. */
- /* finds the next struct sym_fns. They are allocated and initialized
- in whatever module implements the functions pointed to; an
- initializer calls add_symtab_fns to add them to the global chain. */
-
- struct sym_fns *next;
+extern void
+default_symfile_offsets PARAMS ((struct objfile * objfile, struct section_addr_info *));
-};
extern void
extend_psymbol_list PARAMS ((struct psymbol_allocation_list *,
/* Add any kind of symbol to a psymbol_allocation_list. */
-#define ADD_PSYMBOL_VT_TO_LIST(NAME,NAMELENGTH,NAMESPACE,CLASS,LIST,VALUE,VT) \
- do { \
- register struct partial_symbol *psym; \
- if ((LIST).next >= (LIST).list + (LIST).size) \
- extend_psymbol_list (&(LIST),objfile); \
- psym = (LIST).next++; \
- \
- SYMBOL_NAME (psym) = (char *) obstack_alloc (&objfile->psymbol_obstack, \
- (NAMELENGTH) + 1); \
- memcpy (SYMBOL_NAME (psym), (NAME), (NAMELENGTH)); \
- SYMBOL_NAME (psym)[(NAMELENGTH)] = '\0'; \
- SYMBOL_NAMESPACE (psym) = (NAMESPACE); \
- SYMBOL_CLASS (psym) = (CLASS); \
- VT (psym) = (VALUE); \
- } while (0);
-
-#ifdef DEBUG
-
-/* Since one arg is a struct, we have to pass in a ptr and deref it (sigh) */
-
-#define ADD_PSYMBOL_TO_LIST(name, namelength, namespace, class, list, value) \
- add_psymbol_to_list (name, namelength, namespace, class, &list, value)
-
-#define ADD_PSYMBOL_ADDR_TO_LIST(name, namelength, namespace, class, list, value) \
- add_psymbol_addr_to_list (name, namelength, namespace, class, &list, value)
+/* #include "demangle.h" */
-#else /* !DEBUG */
-
-/* Add a symbol with an integer value to a psymtab. */
-
-#define ADD_PSYMBOL_TO_LIST(name, namelength, namespace, class, list, value) \
- ADD_PSYMBOL_VT_TO_LIST (name, namelength, namespace, class, list, value, SYMBOL_VALUE)
-
-/* Add a symbol with a CORE_ADDR value to a psymtab. */
+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 *));
-#define ADD_PSYMBOL_ADDR_TO_LIST(name, namelength, namespace, class, list, value)\
- ADD_PSYMBOL_VT_TO_LIST (name, namelength, namespace, class, list, value, SYMBOL_VALUE_ADDRESS)
+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 *));
-#endif /* DEBUG */
- /* Functions */
+extern void init_psymbol_list PARAMS ((struct objfile *, int));
extern void
sort_pst_symbols PARAMS ((struct partial_symtab *));
extern struct symtab *
-allocate_symtab PARAMS ((char *, struct objfile *));
+ allocate_symtab PARAMS ((char *, struct objfile *));
-extern struct objfile *
-allocate_objfile PARAMS ((bfd *, int));
+extern int
+free_named_symtabs PARAMS ((char *));
extern void
-free_objfile PARAMS ((struct objfile *));
+fill_in_vptr_fieldno PARAMS ((struct type *));
extern void
-free_all_objfiles PARAMS ((void));
+add_symtab_fns PARAMS ((struct sym_fns *));
-extern int
-free_named_symtabs PARAMS ((char *));
+extern void
+init_entry_point_info PARAMS ((struct objfile *));
extern void
-fill_in_vptr_fieldno PARAMS ((struct type *));
+syms_from_objfile PARAMS ((struct objfile *, struct section_addr_info *, int, int));
extern void
-add_symtab_fns PARAMS ((struct sym_fns *));
+new_symfile_objfile PARAMS ((struct objfile *, int, int));
+
+extern struct objfile *
+symbol_file_add PARAMS ((char *, int, struct section_addr_info *, int, int));
+
+/* Build (allocate and populate) a section_addr_info struct from
+ an existing section table. */
+
+struct section_table;
+extern struct section_addr_info *
+build_section_addr_info_from_section_table (const struct section_table *start,
+ const struct section_table *end);
+
+/* Free all memory allocated by build_section_addr_info_from_section_table. */
extern void
-syms_from_objfile PARAMS ((struct objfile *, CORE_ADDR, int, int));
+free_section_addr_info (struct section_addr_info *);
+
extern struct partial_symtab *
-start_psymtab_common PARAMS ((struct objfile *, CORE_ADDR, char *, CORE_ADDR,
- struct partial_symbol *,
- struct partial_symbol *));
+ start_psymtab_common PARAMS ((struct objfile *, struct section_offsets *,
+ char *, CORE_ADDR,
+ struct partial_symbol **,
+ struct partial_symbol **));
/* Sorting your symbols for fast lookup or alphabetical printing. */
extern void
sort_symtab_syms PARAMS ((struct symtab *));
-extern void
-sort_all_symtab_syms PARAMS ((void));
-
/* 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 PARAMS ((char *, int, struct obstack *));
+ obsavestring PARAMS ((char *, int, struct obstack *));
/* Concatenate strings S1, S2 and S3; return the new string.
Space is found in the symbol_obstack. */
extern char *
-obconcat PARAMS ((struct obstack *obstackp, const char *, const char *,
- const char *));
+ obconcat PARAMS ((struct obstack * obstackp, const char *, const char *,
+ const char *));
/* Variables */
-/* The object file that the main symbol table was loaded from (e.g. the
- argument to the "symbol-file" or "file" command). */
+/* whether to auto load solibs at startup time: 0/1.
-extern struct objfile *symfile_objfile;
+ On all platforms, 0 means "don't auto load".
-/* Where execution starts in symfile */
+ On HP-UX, > 0 means a threshhold, in megabytes, of symbol table which will
+ be auto loaded. When the cumulative size of solib symbol table exceeds
+ this threshhold, solibs' symbol tables will not be loaded.
-extern CORE_ADDR entry_point;
+ On other platforms, > 0 means, "always auto load".
+ */
-/* Root of object file struct chain. */
+extern int auto_solib_add;
-extern struct objfile *object_files;
-
-/* Traverse all object files. ALL_OBJFILES_SAFE works even if you delete
- the objfile during the traversal. */
+/* From symfile.c */
-#define ALL_OBJFILES(obj) \
- for (obj = object_files; 0 != obj; obj = obj->next)
+extern CORE_ADDR
+ entry_point_address PARAMS ((void));
-#define ALL_OBJFILES_SAFE(obj,nxt) \
- for (obj = object_files; obj? (nxt=obj->next, 1): 0; obj = nxt)
+extern struct partial_symtab *
+ allocate_psymtab PARAMS ((char *, struct objfile *));
-/* Support for complaining about things in the symbol file that aren't
- catastrophic.
+extern void
+discard_psymtab PARAMS ((struct partial_symtab *));
- Each such thing gets a counter. The first time we have the problem,
- during a symbol read, we report it. At the end of symbol reading,
- if verbose, we report how many of each problem we had. */
+extern void find_lowest_section PARAMS ((bfd *, asection *, PTR));
-struct complaint {
- char *message;
- unsigned counter;
- struct complaint *next;
-};
+extern bfd *symfile_bfd_open PARAMS ((char *));
-/* 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. */
+/* Utility functions for overlay sections: */
+extern int overlay_debugging;
+extern int overlay_cache_invalid;
-extern struct complaint complaint_root[1];
+/* return the "mapped" overlay section containing the PC */
+extern asection *
+ find_pc_mapped_section PARAMS ((CORE_ADDR));
-/* Externally visible variables defined in symfile.c */
+/* return any overlay section containing the PC (even in its LMA region) */
+extern asection *
+ find_pc_overlay PARAMS ((CORE_ADDR));
-/* The object file that the main symbol table was loaded from (e.g. the
- argument to the "symbol-file" or "file" command). */
+/* return true if the section is an overlay */
+extern int
+section_is_overlay PARAMS ((asection *));
-extern struct objfile *symfile_objfile;
+/* return true if the overlay section is currently "mapped" */
+extern int
+section_is_mapped PARAMS ((asection *));
-/* Where execution starts in symfile */
+/* return true if pc belongs to section's VMA */
+extern CORE_ADDR
+ pc_in_mapped_range PARAMS ((CORE_ADDR, asection *));
-extern CORE_ADDR entry_point;
+/* return true if pc belongs to section's LMA */
+extern CORE_ADDR
+ pc_in_unmapped_range PARAMS ((CORE_ADDR, asection *));
-/* Root of object file struct chain. */
+/* map an address from a section's LMA to its VMA */
+extern CORE_ADDR
+ overlay_mapped_address PARAMS ((CORE_ADDR, asection *));
-extern struct objfile *object_files;
+/* map an address from a section's VMA to its LMA */
+extern CORE_ADDR
+ overlay_unmapped_address PARAMS ((CORE_ADDR, asection *));
-/* Functions that handle complaints. (in symfile.c) */
+/* convert an address in an overlay section (force into VMA range) */
+extern CORE_ADDR
+ symbol_overlayed_address PARAMS ((CORE_ADDR, asection *));
-extern void
-complain PARAMS ((struct complaint *, char *));
+/* From dwarfread.c */
extern void
-clear_complaints PARAMS ((int sym_reading, int noisy));
-
-/* From symfile.c */
-
-extern struct partial_symtab *
-allocate_psymtab PARAMS ((char *, struct objfile *));
-
-/* From minsyms.c */
-
-extern PTR
-iterate_over_msymbols PARAMS ((PTR (*func) (struct objfile *,
- struct minimal_symbol *,
- PTR arg1, PTR arg2, PTR arg3),
- PTR arg1, PTR arg2, PTR arg3));
+dwarf_build_psymtabs PARAMS ((struct objfile *, int, file_ptr, unsigned int,
+ file_ptr, unsigned int));
-/* From objfiles.c */
+/* From dwarf2read.c */
-extern PTR
-iterate_over_objfiles PARAMS ((PTR (*func) (struct objfile *,
- PTR arg1, PTR arg2, PTR arg3),
- PTR arg1, PTR arg2, PTR arg3));
+extern int dwarf2_has_info PARAMS ((bfd * abfd));
-extern PTR
-iterate_over_symtabs PARAMS ((PTR (*func) (struct objfile *, struct symtab *,
- PTR arg1, PTR arg2, PTR arg3),
- PTR arg1, PTR arg2, PTR arg3));
+extern void dwarf2_build_psymtabs PARAMS ((struct objfile *, int));
-extern PTR
-iterate_over_psymtabs PARAMS ((PTR (*func) (struct objfile *,
- struct partial_symtab *,
- PTR arg1, PTR arg2, PTR arg3),
- PTR arg1, PTR arg2, PTR arg3));
+/* From mdebugread.c */
-/* From dwarfread.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
-dwarf_build_psymtabs PARAMS ((int, char *, CORE_ADDR, int, unsigned int,
- unsigned int, unsigned int, unsigned int,
- struct objfile *));
+elfmdebug_build_psymtabs PARAMS ((struct objfile *,
+ const struct ecoff_debug_swap *,
+ asection *));
-#endif /* !defined(SYMFILE_H) */
+#endif /* !defined(SYMFILE_H) */
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