d747e0af3d
* All GDB files that #include defs.h: Removed stdio.h. (defs.h): #include stdio.h. This has been tested by building GDBs for all targets hosted on Sun4. None of the build problems were related to stdio.h inclusion. (n.b. many configurations don't build for other reasons.)
339 lines
9.6 KiB
C
339 lines
9.6 KiB
C
/* GDB routines for manipulating objfiles.
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Copyright 1992 Free Software Foundation, Inc.
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Contributed by Cygnus Support, using pieces from other GDB modules.
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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 2 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, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* This file contains support routines for creating, manipulating, and
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destroying objfile structures. */
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#include "defs.h"
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#include "bfd.h" /* Binary File Description */
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#include "symtab.h"
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#include "symfile.h"
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#include <obstack.h>
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/* Externally visible variables that are owned by this module. */
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struct objfile *object_files; /* Linked list of all objfiles */
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/* Allocate a new objfile struct, fill it in as best we can, and return it.
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It is also linked into the list of all known object files. */
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struct objfile *
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allocate_objfile (abfd, filename, dumpable)
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bfd *abfd;
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char *filename;
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int dumpable;
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{
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struct objfile *objfile;
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/* First, if the objfile is to be dumpable, we must malloc the structure
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itself using the mmap version, and arrange that all memory allocation
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for the objfile uses the mmap routines. Otherwise, just use the
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old sbrk'd malloc routines. */
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if (dumpable)
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{
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objfile = (struct objfile *) mmap_xmalloc (sizeof (struct objfile));
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(void) memset (objfile, 0, sizeof (struct objfile));
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objfile -> malloc = mmap_malloc;
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objfile -> realloc = mmap_realloc;
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objfile -> xmalloc = mmap_xmalloc;
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objfile -> xrealloc = mmap_xrealloc;
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objfile -> free = mmap_free;
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objfile -> flags |= OBJF_DUMPABLE;
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}
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else
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{
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objfile = (struct objfile *) xmalloc (sizeof (struct objfile));
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(void) memset (objfile, 0, sizeof (struct objfile));
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objfile -> malloc = (PTR (*) PARAMS ((long))) malloc;
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objfile -> realloc = (PTR (*) PARAMS ((PTR, long))) realloc;
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objfile -> xmalloc = xmalloc;
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objfile -> xrealloc = xrealloc;
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objfile -> free = free;
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}
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/* Now, malloc a fresh copy of the filename string using the malloc
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specified as appropriate for the objfile. */
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objfile -> name = (*objfile -> xmalloc) (strlen (filename) + 1);
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strcpy (objfile -> name, filename);
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objfile -> obfd = abfd;
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objfile -> mtime = bfd_get_mtime (abfd);
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/* Set up the various obstacks to use the memory allocation/free
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functions that are appropriate for this objfile. */
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obstack_full_begin (&objfile -> psymbol_obstack, 0, 0,
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objfile -> xmalloc, objfile -> free);
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obstack_full_begin (&objfile -> symbol_obstack, 0, 0,
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objfile -> xmalloc, objfile -> free);
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obstack_full_begin (&objfile -> type_obstack, 0, 0,
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objfile -> xmalloc, objfile -> free);
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/* Push this file onto the head of the linked list of other such files. */
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objfile -> next = object_files;
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object_files = objfile;
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return (objfile);
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}
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/* Destroy an objfile and all the symtabs and psymtabs under it. Note
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that as much as possible is allocated on the symbol_obstack and
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psymbol_obstack, so that the memory can be efficiently freed. */
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void
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free_objfile (objfile)
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struct objfile *objfile;
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{
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struct objfile *ofp;
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if (objfile -> name)
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{
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(*objfile -> free) (objfile -> name);
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}
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if (objfile -> obfd)
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{
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bfd_close (objfile -> obfd);
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}
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/* Remove it from the chain of all objfiles. */
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if (object_files == objfile)
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{
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object_files = objfile -> next;
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}
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else
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{
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for (ofp = object_files; ofp; ofp = ofp -> next)
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{
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if (ofp -> next == objfile)
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{
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ofp -> next = objfile -> next;
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}
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}
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}
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obstack_free (&objfile -> psymbol_obstack, 0);
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obstack_free (&objfile -> symbol_obstack, 0);
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obstack_free (&objfile -> type_obstack, 0);
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#if 0 /* FIXME!! */
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/* Before the symbol table code was redone to make it easier to
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selectively load and remove information particular to a specific
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linkage unit, gdb used to do these things whenever the monolithic
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symbol table was blown away. How much still needs to be done
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is unknown, but we play it safe for now and keep each action until
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it is shown to be no longer needed. */
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clear_symtab_users_once ();
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#if defined (CLEAR_SOLIB)
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CLEAR_SOLIB ();
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#endif
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clear_pc_function_cache ();
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#endif
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/* The last thing we do is free the objfile struct itself, using the
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free() that is appropriate for the objfile. */
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(*objfile -> free) (objfile);
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}
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/* Free all the object files at once. */
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void
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free_all_objfiles ()
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{
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struct objfile *objfile, *temp;
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ALL_OBJFILES_SAFE (objfile, temp)
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{
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free_objfile (objfile);
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}
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}
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/* Many places in gdb want to test just to see if we have any partial
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symbols available. This function returns zero if none are currently
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available, nonzero otherwise. */
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int
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have_partial_symbols ()
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{
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struct objfile *ofp;
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int havethem = 0;
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for (ofp = object_files; ofp; ofp = ofp -> next)
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{
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if (ofp -> psymtabs != NULL)
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{
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havethem++;
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break;
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}
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}
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return (havethem);
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}
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/* Many places in gdb want to test just to see if we have any full
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symbols available. This function returns zero if none are currently
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available, nonzero otherwise. */
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int
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have_full_symbols ()
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{
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struct objfile *ofp;
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int havethem = 0;
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for (ofp = object_files; ofp; ofp = ofp -> next)
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{
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if (ofp -> symtabs != NULL)
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{
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havethem++;
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break;
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}
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}
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return (havethem);
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}
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/* Many places in gdb want to test just to see if we have any minimal
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symbols available. This function returns zero if none are currently
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available, nonzero otherwise. */
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int
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have_minimal_symbols ()
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{
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struct objfile *ofp;
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int havethem = 0;
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for (ofp = object_files; ofp; ofp = ofp -> next)
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{
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if (ofp -> msymbols != NULL)
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{
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havethem++;
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break;
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}
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}
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return (havethem);
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}
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/* Call the function specified by FUNC for each currently available objfile,
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for as long as this function continues to return NULL. If the function
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ever returns non-NULL, then the iteration over the objfiles is terminated,
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and the result is returned to the caller. The function called has full
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control over the form and content of the information returned via the
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non-NULL result, which may be as simple as a pointer to the objfile that
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the iteration terminated on, or as complex as a pointer to a private
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structure containing multiple results. */
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PTR
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iterate_over_objfiles (func, arg1, arg2, arg3)
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PTR (*func) PARAMS ((struct objfile *, PTR, PTR, PTR));
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PTR arg1;
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PTR arg2;
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PTR arg3;
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{
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register struct objfile *objfile;
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PTR result = NULL;
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for (objfile = object_files;
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objfile != NULL && result == NULL;
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objfile = objfile -> next)
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{
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result = (*func)(objfile, arg1, arg2, arg3);
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}
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return (result);
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}
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/* Call the function specified by FUNC for each currently available symbol
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table, for as long as this function continues to return NULL. If the
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function ever returns non-NULL, then the iteration over the symbol tables
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is terminated, and the result is returned to the caller. The function
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called has full control over the form and content of the information
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returned via the non-NULL result, which may be as simple as a pointer
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to the symtab that the iteration terminated on, or as complex as a
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pointer to a private structure containing multiple results. */
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PTR
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iterate_over_symtabs (func, arg1, arg2, arg3)
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PTR (*func) PARAMS ((struct objfile *, struct symtab *, PTR, PTR, PTR));
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PTR arg1;
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PTR arg2;
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PTR arg3;
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{
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register struct objfile *objfile;
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register struct symtab *symtab;
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PTR result = NULL;
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for (objfile = object_files;
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objfile != NULL && result == NULL;
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objfile = objfile -> next)
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{
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for (symtab = objfile -> symtabs;
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symtab != NULL && result == NULL;
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symtab = symtab -> next)
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{
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result = (*func)(objfile, symtab, arg1, arg2, arg3);
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}
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}
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return (result);
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}
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/* Call the function specified by FUNC for each currently available partial
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symbol table, for as long as this function continues to return NULL. If
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the function ever returns non-NULL, then the iteration over the partial
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symbol tables is terminated, and the result is returned to the caller.
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The function called has full control over the form and content of the
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information returned via the non-NULL result, which may be as simple as a
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pointer to the partial symbol table that the iteration terminated on, or
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as complex as a pointer to a private structure containing multiple
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results. */
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PTR
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iterate_over_psymtabs (func, arg1, arg2, arg3)
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PTR (*func) PARAMS ((struct objfile *, struct partial_symtab *,
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PTR, PTR, PTR));
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PTR arg1;
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PTR arg2;
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PTR arg3;
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{
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register struct objfile *objfile;
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register struct partial_symtab *psymtab;
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PTR result = NULL;
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for (objfile = object_files;
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objfile != NULL && result == NULL;
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objfile = objfile -> next)
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{
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for (psymtab = objfile -> psymtabs;
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psymtab != NULL && result == NULL;
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psymtab = psymtab -> next)
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{
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result = (*func)(objfile, psymtab, arg1, arg2, arg3);
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}
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}
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return (result);
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}
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