/* 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.
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. */
+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". */
+/* 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 {
- struct partial_symbol *list;
- struct partial_symbol *next;
+
+ /* 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;
};
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". */
-
- char *sym_name;
-
- /* 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. */
+ /* BFD flavour that we handle, or (as a special kludge, see xcoffread.c,
+ (enum bfd_flavour)-1 for xcoff). */
- int sym_namelen;
+ 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
/* sym_read (objfile, addr, mainline)
Reads a symbol file into a psymtab (or possibly a symtab).
- OBJFILE is the objfile struct for the file we are reading. ADDR
- is the offset between the file's specified start address and
- its true address in memory. MAINLINE is 1 if this is the
+ OBJFILE is the objfile struct for the file we are reading.
+ SECTION_OFFSETS
+ are the offset between the file's specified section addresses and
+ their true addresses 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. */
- void (*sym_read) PARAMS ((struct objfile *, CORE_ADDR, int));
+ void (*sym_read) PARAMS ((struct objfile *, struct section_offsets *, 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. */
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. The result of this function is handed in to sym_read. */
+
+ struct section_offsets *(*sym_offsets) PARAMS ((struct objfile *, CORE_ADDR));
+
/* 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. */
};
-/* 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
-{
-
- /* 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. */
-
- PTR md;
-
- /* Structure which keeps track of functions that manipulate objfile's
- of the same type as this objfile. I.E. the function to read partial
- symbols for example. Note that this structure is in statically
- allocated memory, and is shared by all objfiles that use the
- object module reader of this type. */
-
- struct sym_fns *sf;
-
- /* Hook for information which is shared by sym_init and sym_read for
- this objfile. It is typically a pointer to malloc'd memory. */
-
- PTR sym_private;
-
-};
-
-/* 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. */
+/* The default version of sym_fns.sym_offsets for readers that don't
+ do anything special. */
-#define OBJF_MAPPED (1 << 0) /* Objfile data is mmap'd */
+extern struct section_offsets *
+default_symfile_offsets PARAMS ((struct objfile *objfile, CORE_ADDR addr));
extern void
/* 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. */
-
-#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)
-
-#endif /* DEBUG */
+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 *));
- /* 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 *));
-extern struct objfile *
-allocate_objfile PARAMS ((bfd *, int));
-
-extern void
-free_objfile PARAMS ((struct objfile *));
-
-extern void
-free_all_objfiles PARAMS ((void));
-
extern int
free_named_symtabs PARAMS ((char *));
extern void
add_symtab_fns PARAMS ((struct sym_fns *));
+extern void
+init_entry_point_info PARAMS ((struct objfile *));
+
extern void
syms_from_objfile PARAMS ((struct objfile *, CORE_ADDR, int, int));
+extern void
+new_symfile_objfile PARAMS ((struct objfile *, int, int));
+
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. */
/* 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;
+extern int auto_solib_add;
-/* Where execution starts in symfile */
+/* From symfile.c */
-extern CORE_ADDR entry_point;
+extern struct partial_symtab *
+allocate_psymtab PARAMS ((char *, struct objfile *));
-/* Root of object file struct chain. */
+extern void find_lowest_section PARAMS ((bfd *, asection *, PTR));
-extern struct objfile *object_files;
+/* Remote targets may wish to use this as their load function. */
+extern void generic_load PARAMS ((char *name, int from_tty));
-/* Traverse all object files. ALL_OBJFILES_SAFE works even if you delete
- the objfile during the traversal. */
+/* From dwarfread.c */
-#define ALL_OBJFILES(obj) \
- for (obj = object_files; 0 != obj; obj = obj->next)
+extern void
+dwarf_build_psymtabs PARAMS ((struct objfile *, struct section_offsets *, int,
+ file_ptr, unsigned int, file_ptr, unsigned int));
-#define ALL_OBJFILES_SAFE(obj,nxt) \
- for (obj = object_files; obj? (nxt=obj->next, 1): 0; obj = nxt)
+/* From dwarf2read.c */
-/* Support for complaining about things in the symbol file that aren't
- catastrophic.
+extern int dwarf2_has_info PARAMS ((bfd *abfd));
- 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 dwarf2_build_psymtabs PARAMS ((struct objfile *,
+ struct section_offsets *,
+ int));
+/* From mdebugread.c */
-struct complaint {
- char *message;
- unsigned counter;
- struct complaint *next;
+/* 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;
};
-
-/* 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. */
-
-extern struct complaint complaint_root[1];
-
-/* Functions that handle complaints. (in symfile.c) */
-
extern void
-complain PARAMS ((struct complaint *, char *));
+mdebug_build_psymtabs PARAMS ((struct objfile *,
+ const struct ecoff_debug_swap *,
+ struct ecoff_debug_info *,
+ struct section_offsets *));
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));
+elfmdebug_build_psymtabs PARAMS ((struct objfile *,
+ const struct ecoff_debug_swap *,
+ asection *,
+ struct section_offsets *));
-/* From objfiles.c */
-
-extern PTR
-iterate_over_objfiles PARAMS ((PTR (*func) (struct objfile *,
- PTR arg1, PTR arg2, PTR arg3),
- PTR arg1, PTR arg2, PTR arg3));
-
-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 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 dwarfread.c */
+/* From demangle.c */
extern void
-dwarf_build_psymtabs PARAMS ((int, char *, CORE_ADDR, int, unsigned int,
- unsigned int, unsigned int, unsigned int,
- struct objfile *));
+set_demangling_style PARAMS ((char *));
#endif /* !defined(SYMFILE_H) */