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Diffstat (limited to 'gdb/symfile.c')
| -rw-r--r-- | gdb/symfile.c | 3107 |
1 files changed, 0 insertions, 3107 deletions
diff --git a/gdb/symfile.c b/gdb/symfile.c deleted file mode 100644 index ca864dd..0000000 --- a/gdb/symfile.c +++ /dev/null @@ -1,3107 +0,0 @@ -/* Generic symbol file reading for the GNU debugger, GDB. - Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998 - Free Software Foundation, Inc. - Contributed by Cygnus Support, using pieces from other GDB modules. - -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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ - -#include "defs.h" -#include "symtab.h" -#include "gdbtypes.h" -#include "gdbcore.h" -#include "frame.h" -#include "target.h" -#include "value.h" -#include "symfile.h" -#include "objfiles.h" -#include "gdbcmd.h" -#include "breakpoint.h" -#include "language.h" -#include "complaints.h" -#include "demangle.h" -#include "inferior.h" /* for write_pc */ -#include "gdb-stabs.h" -#include "obstack.h" - -#include <assert.h> -#include <sys/types.h> -#include <fcntl.h> -#include "gdb_string.h" -#include "gdb_stat.h" -#include <ctype.h> -#include <time.h> -#ifdef HAVE_UNISTD_H -#include <unistd.h> -#endif - -#ifndef O_BINARY -#define O_BINARY 0 -#endif - -#ifdef HPUXHPPA -extern int hpread_pxdb_check PARAMS ((bfd *, char *)); - -/* Some HP-UX related globals to clear when a new "main" - symbol file is loaded. HP-specific. */ - -extern int hp_som_som_object_present; -extern int hp_cxx_exception_support_initialized; -#define RESET_HP_UX_GLOBALS() do {\ - hp_som_som_object_present = 0; /* indicates HP-compiled code */ \ - hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \ - } while (0) -#endif - -int (*ui_load_progress_hook) PARAMS ((char *, unsigned long)); -void (*pre_add_symbol_hook) PARAMS ((char *)); -void (*post_add_symbol_hook) PARAMS ((void)); - -/* Global variables owned by this file */ -int readnow_symbol_files; /* Read full symbols immediately */ - -struct complaint oldsyms_complaint = { - "Replacing old symbols for `%s'", 0, 0 -}; - -struct complaint empty_symtab_complaint = { - "Empty symbol table found for `%s'", 0, 0 -}; - -/* External variables and functions referenced. */ - -extern int info_verbose; - -extern void report_transfer_performance PARAMS ((unsigned long, - time_t, time_t)); - -/* Functions this file defines */ - -#if 0 -static int simple_read_overlay_region_table PARAMS ((void)); -static void simple_free_overlay_region_table PARAMS ((void)); -#endif - -static void set_initial_language PARAMS ((void)); - -static void load_command PARAMS ((char *, int)); - -static void add_symbol_file_command PARAMS ((char *, int)); - -static void add_shared_symbol_files_command PARAMS ((char *, int)); - -static void cashier_psymtab PARAMS ((struct partial_symtab *)); - -static int compare_psymbols PARAMS ((const void *, const void *)); - -static int compare_symbols PARAMS ((const void *, const void *)); - -bfd *symfile_bfd_open PARAMS ((char *)); - -static void find_sym_fns PARAMS ((struct objfile *)); - -static void decrement_reading_symtab PARAMS ((void *)); - -static void overlay_invalidate_all PARAMS ((void)); - -static int overlay_is_mapped PARAMS ((struct obj_section *)); - -void list_overlays_command PARAMS ((char *, int)); - -void map_overlay_command PARAMS ((char *, int)); - -void unmap_overlay_command PARAMS ((char *, int)); - -static void overlay_auto_command PARAMS ((char *, int)); - -static void overlay_manual_command PARAMS ((char *, int)); - -static void overlay_off_command PARAMS ((char *, int)); - -static void overlay_load_command PARAMS ((char *, int)); - -static void overlay_command PARAMS ((char *, int)); - -static void simple_free_overlay_table PARAMS ((void)); - -static void read_target_long_array PARAMS ((CORE_ADDR, unsigned int *, int)); - -static int simple_read_overlay_table PARAMS ((void)); - -static int simple_overlay_update_1 PARAMS ((struct obj_section *)); - -void _initialize_symfile PARAMS ((void)); - -/* List of all available sym_fns. On gdb startup, each object file reader - calls add_symtab_fns() to register information on each format it is - prepared to read. */ - -static struct sym_fns *symtab_fns = NULL; - -/* Flag for whether user will be reloading symbols multiple times. - Defaults to ON for VxWorks, otherwise OFF. */ - -#ifdef SYMBOL_RELOADING_DEFAULT -int symbol_reloading = SYMBOL_RELOADING_DEFAULT; -#else -int symbol_reloading = 0; -#endif - -/* If non-zero, then on HP-UX (i.e., platforms that use somsolib.c), - this variable is interpreted as a threshhold. If adding a new - library's symbol table to those already known to the debugger would - exceed this threshhold, then the shlib's symbols are not added. - - If non-zero on other platforms, 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. - - Note that HP-UX interprets this variable to mean, "threshhold size - in megabytes, where zero means never add". Other platforms interpret - this variable to mean, "always add if non-zero, never add if zero." - */ - -int auto_solib_add = 1; - - -/* Since this function is called from within qsort, in an ANSI environment - it must conform to the prototype for qsort, which specifies that the - comparison function takes two "void *" pointers. */ - -static int -compare_symbols (s1p, s2p) - const PTR s1p; - const PTR s2p; -{ - register struct symbol **s1, **s2; - - s1 = (struct symbol **) s1p; - s2 = (struct symbol **) s2p; - - return (STRCMP (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2))); -} - -/* - -LOCAL FUNCTION - - compare_psymbols -- compare two partial symbols by name - -DESCRIPTION - - Given pointers to pointers to two partial symbol table entries, - compare them by name and return -N, 0, or +N (ala strcmp). - Typically used by sorting routines like qsort(). - -NOTES - - Does direct compare of first two characters before punting - and passing to strcmp for longer compares. Note that the - original version had a bug whereby two null strings or two - identically named one character strings would return the - comparison of memory following the null byte. - - */ - -static int -compare_psymbols (s1p, s2p) - const PTR s1p; - const PTR s2p; -{ - register char *st1 = SYMBOL_NAME (*(struct partial_symbol **) s1p); - register char *st2 = SYMBOL_NAME (*(struct partial_symbol **) s2p); - - if ((st1[0] - st2[0]) || !st1[0]) - { - return (st1[0] - st2[0]); - } - else if ((st1[1] - st2[1]) || !st1[1]) - { - return (st1[1] - st2[1]); - } - else - { - /* Note: I replaced the STRCMP line (commented out below) - * with a simpler "strcmp()" which compares the 2 strings - * from the beginning. (STRCMP is a macro which first compares - * the initial characters, then falls back on strcmp). - * The reason is that the STRCMP line was tickling a C compiler - * bug on HP-UX 10.30, which is avoided with the simpler - * code. The performance gain from the more complicated code - * is negligible, given that we have already checked the - * initial 2 characters above. I reported the compiler bug, - * and once it is fixed the original line can be put back. RT - */ - /* return ( STRCMP (st1 + 2, st2 + 2)); */ - return ( strcmp (st1, st2)); - } -} - -void -sort_pst_symbols (pst) - struct partial_symtab *pst; -{ - /* Sort the global list; don't sort the static list */ - - qsort (pst -> objfile -> global_psymbols.list + pst -> globals_offset, - pst -> n_global_syms, sizeof (struct partial_symbol *), - compare_psymbols); -} - -/* Call sort_block_syms to sort alphabetically the symbols of one block. */ - -void -sort_block_syms (b) - register struct block *b; -{ - qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b), - sizeof (struct symbol *), compare_symbols); -} - -/* Call sort_symtab_syms to sort alphabetically - the symbols of each block of one symtab. */ - -void -sort_symtab_syms (s) - register struct symtab *s; -{ - register struct blockvector *bv; - int nbl; - int i; - register struct block *b; - - if (s == 0) - return; - bv = BLOCKVECTOR (s); - nbl = BLOCKVECTOR_NBLOCKS (bv); - for (i = 0; i < nbl; i++) - { - b = BLOCKVECTOR_BLOCK (bv, i); - if (BLOCK_SHOULD_SORT (b)) - sort_block_syms (b); - } -} - -/* Make a null terminated copy of the string at PTR with SIZE characters in - the obstack pointed to by OBSTACKP . Returns the address of the copy. - Note that the string at PTR does not have to be null terminated, I.E. it - may be part of a larger string and we are only saving a substring. */ - -char * -obsavestring (ptr, size, obstackp) - char *ptr; - int size; - struct obstack *obstackp; -{ - register char *p = (char *) obstack_alloc (obstackp, size + 1); - /* Open-coded memcpy--saves function call time. These strings are usually - short. FIXME: Is this really still true with a compiler that can - inline memcpy? */ - { - register char *p1 = ptr; - register char *p2 = p; - char *end = ptr + size; - while (p1 != end) - *p2++ = *p1++; - } - p[size] = 0; - return p; -} - -/* Concatenate strings S1, S2 and S3; return the new string. Space is found - in the obstack pointed to by OBSTACKP. */ - -char * -obconcat (obstackp, s1, s2, s3) - struct obstack *obstackp; - const char *s1, *s2, *s3; -{ - register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1; - register char *val = (char *) obstack_alloc (obstackp, len); - strcpy (val, s1); - strcat (val, s2); - strcat (val, s3); - return val; -} - -/* True if we are nested inside psymtab_to_symtab. */ - -int currently_reading_symtab = 0; - -static void -decrement_reading_symtab (dummy) - void *dummy; -{ - currently_reading_symtab--; -} - -/* Get the symbol table that corresponds to a partial_symtab. - This is fast after the first time you do it. In fact, there - is an even faster macro PSYMTAB_TO_SYMTAB that does the fast - case inline. */ - -struct symtab * -psymtab_to_symtab (pst) - register struct partial_symtab *pst; -{ - /* If it's been looked up before, return it. */ - if (pst->symtab) - return pst->symtab; - - /* If it has not yet been read in, read it. */ - if (!pst->readin) - { - struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL); - currently_reading_symtab++; - (*pst->read_symtab) (pst); - do_cleanups (back_to); - } - - return pst->symtab; -} - -/* Initialize entry point information for this objfile. */ - -void -init_entry_point_info (objfile) - struct objfile *objfile; -{ - /* Save startup file's range of PC addresses to help blockframe.c - decide where the bottom of the stack is. */ - - if (bfd_get_file_flags (objfile -> obfd) & EXEC_P) - { - /* Executable file -- record its entry point so we'll recognize - the startup file because it contains the entry point. */ - objfile -> ei.entry_point = bfd_get_start_address (objfile -> obfd); - } - else - { - /* Examination of non-executable.o files. Short-circuit this stuff. */ - objfile -> ei.entry_point = INVALID_ENTRY_POINT; - } - objfile -> ei.entry_file_lowpc = INVALID_ENTRY_LOWPC; - objfile -> ei.entry_file_highpc = INVALID_ENTRY_HIGHPC; - objfile -> ei.entry_func_lowpc = INVALID_ENTRY_LOWPC; - objfile -> ei.entry_func_highpc = INVALID_ENTRY_HIGHPC; - objfile -> ei.main_func_lowpc = INVALID_ENTRY_LOWPC; - objfile -> ei.main_func_highpc = INVALID_ENTRY_HIGHPC; -} - -/* Get current entry point address. */ - -CORE_ADDR -entry_point_address() -{ - return symfile_objfile ? symfile_objfile->ei.entry_point : 0; -} - -/* Remember the lowest-addressed loadable section we've seen. - This function is called via bfd_map_over_sections. - - In case of equal vmas, the section with the largest size becomes the - lowest-addressed loadable section. - - If the vmas and sizes are equal, the last section is considered the - lowest-addressed loadable section. */ - -void -find_lowest_section (abfd, sect, obj) - bfd *abfd; - asection *sect; - PTR obj; -{ - asection **lowest = (asection **)obj; - - if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD)) - return; - if (!*lowest) - *lowest = sect; /* First loadable section */ - else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect)) - *lowest = sect; /* A lower loadable section */ - else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect) - && (bfd_section_size (abfd, (*lowest)) - <= bfd_section_size (abfd, sect))) - *lowest = sect; -} - -/* Parse the user's idea of an offset for dynamic linking, into our idea - of how to represent it for fast symbol reading. This is the default - version of the sym_fns.sym_offsets function for symbol readers that - don't need to do anything special. It allocates a section_offsets table - for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */ - -struct section_offsets * -default_symfile_offsets (objfile, addr) - struct objfile *objfile; - CORE_ADDR addr; -{ - struct section_offsets *section_offsets; - int i; - - objfile->num_sections = SECT_OFF_MAX; - section_offsets = (struct section_offsets *) - obstack_alloc (&objfile -> psymbol_obstack, SIZEOF_SECTION_OFFSETS); - - for (i = 0; i < SECT_OFF_MAX; i++) - ANOFFSET (section_offsets, i) = addr; - - return section_offsets; -} - - -/* Process a symbol file, as either the main file or as a dynamically - loaded file. - - NAME is the file name (which will be tilde-expanded and made - absolute herein) (but we don't free or modify NAME itself). - FROM_TTY says how verbose to be. MAINLINE specifies whether this - is the main symbol file, or whether it's an extra symbol file such - as dynamically loaded code. If !mainline, ADDR is the address - where the text segment was loaded. If VERBO, the caller has printed - a verbose message about the symbol reading (and complaints can be - more terse about it). */ - -void -syms_from_objfile (objfile, addr, mainline, verbo) - struct objfile *objfile; - CORE_ADDR addr; - int mainline; - int verbo; -{ - struct section_offsets *section_offsets; - asection *lowest_sect; - struct cleanup *old_chain; - - init_entry_point_info (objfile); - find_sym_fns (objfile); - - /* Make sure that partially constructed symbol tables will be cleaned up - if an error occurs during symbol reading. */ - old_chain = make_cleanup ((make_cleanup_func) free_objfile, objfile); - - if (mainline) - { - /* We will modify the main symbol table, make sure that all its users - will be cleaned up if an error occurs during symbol reading. */ - make_cleanup ((make_cleanup_func) clear_symtab_users, 0); - - /* Since no error yet, throw away the old symbol table. */ - - if (symfile_objfile != NULL) - { - free_objfile (symfile_objfile); - symfile_objfile = NULL; - } - - /* Currently we keep symbols from the add-symbol-file command. - If the user wants to get rid of them, they should do "symbol-file" - without arguments first. Not sure this is the best behavior - (PR 2207). */ - - (*objfile -> sf -> sym_new_init) (objfile); - } - - /* Convert addr into an offset rather than an absolute address. - We find the lowest address of a loaded segment in the objfile, - and assume that <addr> is where that got loaded. Due to historical - precedent, we warn if that doesn't happen to be a text segment. */ - - if (mainline) - { - addr = 0; /* No offset from objfile addresses. */ - } - else - { - lowest_sect = bfd_get_section_by_name (objfile->obfd, ".text"); - if (lowest_sect == NULL) - bfd_map_over_sections (objfile->obfd, find_lowest_section, - (PTR) &lowest_sect); - - if (lowest_sect == NULL) - warning ("no loadable sections found in added symbol-file %s", - objfile->name); - else if ((bfd_get_section_flags (objfile->obfd, lowest_sect) & SEC_CODE) - == 0) - /* FIXME-32x64--assumes bfd_vma fits in long. */ - warning ("Lowest section in %s is %s at 0x%lx", - objfile->name, - bfd_section_name (objfile->obfd, lowest_sect), - (unsigned long) bfd_section_vma (objfile->obfd, lowest_sect)); - - if (lowest_sect) - addr -= bfd_section_vma (objfile->obfd, lowest_sect); - } - - /* Initialize symbol reading routines for this objfile, allow complaints to - appear for this new file, and record how verbose to be, then do the - initial symbol reading for this file. */ - - (*objfile -> sf -> sym_init) (objfile); - clear_complaints (1, verbo); - - section_offsets = (*objfile -> sf -> sym_offsets) (objfile, addr); - objfile->section_offsets = section_offsets; - -#ifndef IBM6000_TARGET - /* This is a SVR4/SunOS specific hack, I think. In any event, it - screws RS/6000. sym_offsets should be doing this sort of thing, - because it knows the mapping between bfd sections and - section_offsets. */ - /* This is a hack. As far as I can tell, section offsets are not - target dependent. They are all set to addr with a couple of - exceptions. The exceptions are sysvr4 shared libraries, whose - offsets are kept in solib structures anyway and rs6000 xcoff - which handles shared libraries in a completely unique way. - - Section offsets are built similarly, except that they are built - by adding addr in all cases because there is no clear mapping - from section_offsets into actual sections. Note that solib.c - has a different algorythm for finding section offsets. - - These should probably all be collapsed into some target - independent form of shared library support. FIXME. */ - - if (addr) - { - struct obj_section *s; - - for (s = objfile->sections; s < objfile->sections_end; ++s) - { - s->addr -= s->offset; - s->addr += addr; - s->endaddr -= s->offset; - s->endaddr += addr; - s->offset += addr; - } - } -#endif /* not IBM6000_TARGET */ - - (*objfile -> sf -> sym_read) (objfile, section_offsets, mainline); - - if (!have_partial_symbols () && !have_full_symbols ()) - { - wrap_here (""); - printf_filtered ("(no debugging symbols found)..."); - wrap_here (""); - } - - /* Don't allow char * to have a typename (else would get caddr_t). - Ditto void *. FIXME: Check whether this is now done by all the - symbol readers themselves (many of them now do), and if so remove - it from here. */ - - TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0; - TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0; - - /* Mark the objfile has having had initial symbol read attempted. Note - that this does not mean we found any symbols... */ - - objfile -> flags |= OBJF_SYMS; - - /* Discard cleanups as symbol reading was successful. */ - - discard_cleanups (old_chain); - -/* Call this after reading in a new symbol table to give target dependant code - a crack at the new symbols. For instance, this could be used to update the - values of target-specific symbols GDB needs to keep track of (such as - _sigtramp, or whatever). */ - - TARGET_SYMFILE_POSTREAD (objfile); -} - -/* Perform required actions after either reading in the initial - symbols for a new objfile, or mapping in the symbols from a reusable - objfile. */ - -void -new_symfile_objfile (objfile, mainline, verbo) - struct objfile *objfile; - int mainline; - int verbo; -{ - - /* If this is the main symbol file we have to clean up all users of the - old main symbol file. Otherwise it is sufficient to fixup all the - breakpoints that may have been redefined by this symbol file. */ - if (mainline) - { - /* OK, make it the "real" symbol file. */ - symfile_objfile = objfile; - - clear_symtab_users (); - } - else - { - breakpoint_re_set (); - } - - /* We're done reading the symbol file; finish off complaints. */ - clear_complaints (0, verbo); -} - -/* Process a symbol file, as either the main file or as a dynamically - loaded file. - - NAME is the file name (which will be tilde-expanded and made - absolute herein) (but we don't free or modify NAME itself). - FROM_TTY says how verbose to be. MAINLINE specifies whether this - is the main symbol file, or whether it's an extra symbol file such - as dynamically loaded code. If !mainline, ADDR is the address - where the text segment was loaded. - - USER_LOADED is TRUE if the add-symbol-file command was how this - symbol file came to be processed. - - IS_SOLIB is TRUE if this symbol file represents a solib, as discovered - by the target's implementation of the solib package. - - Upon success, returns a pointer to the objfile that was added. - Upon failure, jumps back to command level (never returns). */ - -struct objfile * -symbol_file_add (name, from_tty, addr, mainline, mapped, readnow, user_loaded, is_solib) - char *name; - int from_tty; - CORE_ADDR addr; - int mainline; - int mapped; - int readnow; - int user_loaded; - int is_solib; -{ - struct objfile *objfile; - struct partial_symtab *psymtab; - bfd *abfd; - - /* Open a bfd for the file, and give user a chance to burp if we'd be - interactively wiping out any existing symbols. */ - - abfd = symfile_bfd_open (name); - -#if 0 -#ifdef GDB_TARGET_IS_HPPA -{ - /********* TARGET SPECIFIC CODE (HACK!) ********** - * - * The following code is HP-specific. The "right" way of - * doing this is unknown, but we bet would involve a target- - * specific pre-file-load check using a generic mechanism. - */ - /* elz: I moved this code from inside the symfile_bfd_open function - this way we don't have to worry about recursion. - I also have taken out the call to pxdb from within the check - for pxdb processing. Seemed two logically unrelated things, - and I needed a pure checking later on anyway. - */ - - if( hpread_pxdb_needed( abfd )) - { - /* - * This file has not been pre-processed. - * Preprocess now - */ - - if (hpread_call_pxdb(name)) - { - /* The - * call above has used "system" to pre-process - * the on-disk file, so we now need to close - * and re-open the file. - */ - bfd_close (abfd); /* This also closes 'desc', */ - /* hence the recursion. */ - abfd = symfile_bfd_open( name ); - } - else /* we fail miserably without pxdb!!!*/ - /* the warning to the user has already been given - from within the call_pxdb function - */ - error("Command ignored.\n"); - } -} - /*************** END HACK ********************/ -#endif -#endif /* 0 */ - - - if ((have_full_symbols () || have_partial_symbols ()) - && mainline - && from_tty - && !query ("Load new symbol table from \"%s\"? ", name)) - error ("Not confirmed."); - - objfile = allocate_objfile (abfd, mapped, user_loaded, is_solib); - - /* If the objfile uses a mapped symbol file, and we have a psymtab for - it, then skip reading any symbols at this time. */ - - if ((objfile -> flags & OBJF_MAPPED) && (objfile -> flags & OBJF_SYMS)) - { - /* We mapped in an existing symbol table file that already has had - initial symbol reading performed, so we can skip that part. Notify - the user that instead of reading the symbols, they have been mapped. - */ - if (from_tty || info_verbose) - { - printf_filtered ("Mapped symbols for %s...", name); - wrap_here (""); - gdb_flush (gdb_stdout); - } - init_entry_point_info (objfile); - find_sym_fns (objfile); - } - else - { - /* We either created a new mapped symbol table, mapped an existing - symbol table file which has not had initial symbol reading - performed, or need to read an unmapped symbol table. */ - if (from_tty || info_verbose) - { - if (pre_add_symbol_hook) - pre_add_symbol_hook (name); - else - { - printf_filtered ("Reading symbols from %s...", name); - wrap_here (""); - gdb_flush (gdb_stdout); - } - } - syms_from_objfile (objfile, addr, mainline, from_tty); - } - - /* We now have at least a partial symbol table. Check to see if the - user requested that all symbols be read on initial access via either - the gdb startup command line or on a per symbol file basis. Expand - all partial symbol tables for this objfile if so. */ - - if (readnow || readnow_symbol_files) - { - if (from_tty || info_verbose) - { - printf_filtered ("expanding to full symbols..."); - wrap_here (""); - gdb_flush (gdb_stdout); - } - - for (psymtab = objfile -> psymtabs; - psymtab != NULL; - psymtab = psymtab -> next) - { - psymtab_to_symtab (psymtab); - } - } - - if (from_tty || info_verbose) - { - if (post_add_symbol_hook) - post_add_symbol_hook (); - else - { - printf_filtered ("done.\n"); - gdb_flush (gdb_stdout); - } - } - - new_symfile_objfile (objfile, mainline, from_tty); - - target_new_objfile (objfile); - - return (objfile); -} - -/* This is the symbol-file command. Read the file, analyze its - symbols, and add a struct symtab to a symtab list. The syntax of - the command is rather bizarre--(1) buildargv implements various - quoting conventions which are undocumented and have little or - nothing in common with the way things are quoted (or not quoted) - elsewhere in GDB, (2) options are used, which are not generally - used in GDB (perhaps "set mapped on", "set readnow on" would be - better), (3) the order of options matters, which is contrary to GNU - conventions (because it is confusing and inconvenient). */ - -void -symbol_file_command (args, from_tty) - char *args; - int from_tty; -{ - char **argv; - char *name = NULL; - CORE_ADDR text_relocation = 0; /* text_relocation */ - struct cleanup *cleanups; - int mapped = 0; - int readnow = 0; - - dont_repeat (); - - if (args == NULL) - { - if ((have_full_symbols () || have_partial_symbols ()) - && from_tty - && !query ("Discard symbol table from `%s'? ", - symfile_objfile -> name)) - error ("Not confirmed."); - free_all_objfiles (); - - /* solib descriptors may have handles to objfiles. Since their - storage has just been released, we'd better wipe the solib - descriptors as well. - */ -#if defined(SOLIB_RESTART) - SOLIB_RESTART (); -#endif - - symfile_objfile = NULL; - if (from_tty) - { - printf_unfiltered ("No symbol file now.\n"); - } -#ifdef HPUXHPPA - RESET_HP_UX_GLOBALS (); -#endif - } - else - { - if ((argv = buildargv (args)) == NULL) - { - nomem (0); - } - cleanups = make_cleanup ((make_cleanup_func) freeargv, (char *) argv); - while (*argv != NULL) - { - if (STREQ (*argv, "-mapped")) - { - mapped = 1; - } - else if (STREQ (*argv, "-readnow")) - { - readnow = 1; - } - else if (**argv == '-') - { - error ("unknown option `%s'", *argv); - } - else - { - char *p; - - name = *argv; - - /* this is for rombug remote only, to get the text relocation by - using link command */ - p = strrchr(name, '/'); - if (p != NULL) p++; - else p = name; - - target_link(p, &text_relocation); - - if (text_relocation == (CORE_ADDR)0) - return; - else if (text_relocation == (CORE_ADDR)-1) - { - symbol_file_add (name, from_tty, (CORE_ADDR)0, - 1, mapped, readnow, 1, 0); -#ifdef HPUXHPPA - RESET_HP_UX_GLOBALS (); -#endif - } - else - symbol_file_add (name, from_tty, (CORE_ADDR)text_relocation, - 0, mapped, readnow, 1, 0); - - /* Getting new symbols may change our opinion about what is - frameless. */ - reinit_frame_cache (); - - set_initial_language (); - } - argv++; - } - - if (name == NULL) - { - error ("no symbol file name was specified"); - } - TUIDO(((TuiOpaqueFuncPtr)tuiDisplayMainFunction)); - do_cleanups (cleanups); - } -} - -/* Set the initial language. - - A better solution would be to record the language in the psymtab when reading - partial symbols, and then use it (if known) to set the language. This would - be a win for formats that encode the language in an easily discoverable place, - such as DWARF. For stabs, we can jump through hoops looking for specially - named symbols or try to intuit the language from the specific type of stabs - we find, but we can't do that until later when we read in full symbols. - FIXME. */ - -static void -set_initial_language () -{ - struct partial_symtab *pst; - enum language lang = language_unknown; - - pst = find_main_psymtab (); - if (pst != NULL) - { - if (pst -> filename != NULL) - { - lang = deduce_language_from_filename (pst -> filename); - } - if (lang == language_unknown) - { - /* Make C the default language */ - lang = language_c; - } - set_language (lang); - expected_language = current_language; /* Don't warn the user */ - } -} - -/* Open file specified by NAME and hand it off to BFD for preliminary - analysis. Result is a newly initialized bfd *, which includes a newly - malloc'd` copy of NAME (tilde-expanded and made absolute). - In case of trouble, error() is called. */ - -bfd * -symfile_bfd_open (name) - char *name; -{ - bfd *sym_bfd; - int desc; - char *absolute_name; - - - - name = tilde_expand (name); /* Returns 1st new malloc'd copy */ - - /* Look down path for it, allocate 2nd new malloc'd copy. */ - desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name); -#if defined(__GO32__) || defined(_WIN32) - if (desc < 0) - { - char *exename = alloca (strlen (name) + 5); - strcat (strcpy (exename, name), ".exe"); - desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY, - 0, &absolute_name); - } -#endif - if (desc < 0) - { - make_cleanup (free, name); - perror_with_name (name); - } - free (name); /* Free 1st new malloc'd copy */ - name = absolute_name; /* Keep 2nd malloc'd copy in bfd */ - /* It'll be freed in free_objfile(). */ - - sym_bfd = bfd_fdopenr (name, gnutarget, desc); - if (!sym_bfd) - { - close (desc); - make_cleanup (free, name); - error ("\"%s\": can't open to read symbols: %s.", name, - bfd_errmsg (bfd_get_error ())); - } - sym_bfd->cacheable = true; - - if (!bfd_check_format (sym_bfd, bfd_object)) - { - /* FIXME: should be checking for errors from bfd_close (for one thing, - on error it does not free all the storage associated with the - bfd). */ - bfd_close (sym_bfd); /* This also closes desc */ - make_cleanup (free, name); - error ("\"%s\": can't read symbols: %s.", name, - bfd_errmsg (bfd_get_error ())); - } - -#ifdef HPUXHPPA - { - /********* TARGET SPECIFIC CODE (HACK!) ********** - * - * The following code is HP-specific. The "right" way of - * doing this is unknown, but we bet would involve a target- - * specific pre-file-load check using a generic mechanism. - */ - static prevent_recursion = 0; /* Needed for hack below! HP-specific */ - - if( prevent_recursion == 0 ) { - if( hpread_pxdb_needed (sym_bfd, name)) { - /* - * This file has not been pre-processed. - * Preprocess now - */ - - if (hpread_call_pxdb(name)) - { - /* The - * call above has used "system" to pre-process - * the on-disk file, so we now need to close - * and re-open the file. - */ - bfd_close (sym_bfd); /* This also closes 'desc', */ - /* hence the recursion. */ - prevent_recursion++; - sym_bfd = symfile_bfd_open( name ); - prevent_recursion--; - } - } - } -} - /*************** END HACK ********************/ -#endif - - return (sym_bfd); -} - -/* Link a new symtab_fns into the global symtab_fns list. Called on gdb - startup by the _initialize routine in each object file format reader, - to register information about each format the the reader is prepared - to handle. */ - -void -add_symtab_fns (sf) - struct sym_fns *sf; -{ - sf->next = symtab_fns; - symtab_fns = sf; -} - - -/* Initialize to read symbols from the symbol file sym_bfd. It either - returns or calls error(). The result is an initialized struct sym_fns - in the objfile structure, that contains cached information about the - symbol file. */ - -static void -find_sym_fns (objfile) - struct objfile *objfile; -{ - struct sym_fns *sf; - enum bfd_flavour our_flavour = bfd_get_flavour (objfile -> obfd); - char *our_target = bfd_get_target (objfile -> obfd); - - /* Special kludge for RS/6000 and PowerMac. See xcoffread.c. */ - if (STREQ (our_target, "aixcoff-rs6000") || - STREQ (our_target, "xcoff-powermac")) - our_flavour = (enum bfd_flavour)-1; - - /* Special kludge for apollo. See dstread.c. */ - if (STREQN (our_target, "apollo", 6)) - our_flavour = (enum bfd_flavour)-2; - - for (sf = symtab_fns; sf != NULL; sf = sf -> next) - { - if (our_flavour == sf -> sym_flavour) - { - objfile -> sf = sf; - return; - } - } - error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.", - bfd_get_target (objfile -> obfd)); -} - -/* This function runs the load command of our current target. */ - -static void -load_command (arg, from_tty) - char *arg; - int from_tty; -{ - if (arg == NULL) - arg = get_exec_file (1); - target_load (arg, from_tty); -} - -/* This version of "load" should be usable for any target. Currently - it is just used for remote targets, not inftarg.c or core files, - on the theory that only in that case is it useful. - - Avoiding xmodem and the like seems like a win (a) because we don't have - to worry about finding it, and (b) On VMS, fork() is very slow and so - we don't want to run a subprocess. On the other hand, I'm not sure how - performance compares. */ -#define GENERIC_LOAD_CHUNK 256 -#define VALIDATE_DOWNLOAD 0 -void -generic_load (filename, from_tty) - char *filename; - int from_tty; -{ - struct cleanup *old_cleanups; - asection *s; - bfd *loadfile_bfd; - time_t start_time, end_time; /* Start and end times of download */ - unsigned long data_count = 0; /* Number of bytes transferred to memory */ - int n; - unsigned long load_offset = 0; /* offset to add to vma for each section */ - char buf[GENERIC_LOAD_CHUNK+8]; -#if VALIDATE_DOWNLOAD - char verify_buffer[GENERIC_LOAD_CHUNK+8] ; -#endif - - /* enable user to specify address for downloading as 2nd arg to load */ - n = sscanf(filename, "%s 0x%lx", buf, &load_offset); - if (n > 1 ) - filename = buf; - else - load_offset = 0; - - loadfile_bfd = bfd_openr (filename, gnutarget); - if (loadfile_bfd == NULL) - { - perror_with_name (filename); - return; - } - /* FIXME: should be checking for errors from bfd_close (for one thing, - on error it does not free all the storage associated with the - bfd). */ - old_cleanups = make_cleanup ((make_cleanup_func) bfd_close, loadfile_bfd); - - if (!bfd_check_format (loadfile_bfd, bfd_object)) - { - error ("\"%s\" is not an object file: %s", filename, - bfd_errmsg (bfd_get_error ())); - } - - start_time = time (NULL); - - for (s = loadfile_bfd->sections; s; s = s->next) - { - if (s->flags & SEC_LOAD) - { - bfd_size_type size; - - size = bfd_get_section_size_before_reloc (s); - if (size > 0) - { - char *buffer; - struct cleanup *old_chain; - bfd_vma lma; - unsigned long l = size ; - int err; - char *sect; - unsigned long sent; - unsigned long len; - - l = l > GENERIC_LOAD_CHUNK ? GENERIC_LOAD_CHUNK : l ; - - buffer = xmalloc (size); - old_chain = make_cleanup (free, buffer); - - lma = s->lma; - lma += load_offset; - - /* Is this really necessary? I guess it gives the user something - to look at during a long download. */ - printf_filtered ("Loading section %s, size 0x%lx lma ", - bfd_get_section_name (loadfile_bfd, s), - (unsigned long) size); - print_address_numeric (lma, 1, gdb_stdout); - printf_filtered ("\n"); - - bfd_get_section_contents (loadfile_bfd, s, buffer, 0, size); - - sect = (char *) bfd_get_section_name (loadfile_bfd, s); - sent = 0; - do - { - len = (size - sent) < l ? (size - sent) : l; - sent += len; - err = target_write_memory (lma, buffer, len); - if (ui_load_progress_hook) - if (ui_load_progress_hook (sect, sent)) - error ("Canceled the download"); -#if VALIDATE_DOWNLOAD - /* Broken memories and broken monitors manifest themselves - here when bring new computers to life. - This doubles already slow downloads. - */ - if (err) break ; - { - target_read_memory(lma,verify_buffer,len) ; - if (0 != bcmp(buffer,verify_buffer,len)) - error("Download verify failed at %08x", - (unsigned long)lma) ; - } - -#endif - data_count += len ; - lma += len; - buffer += len; - } /* od */ - while (err == 0 && sent < size); - - if (err != 0) - error ("Memory access error while loading section %s.", - bfd_get_section_name (loadfile_bfd, s)); - - do_cleanups (old_chain); - } - } - } - - end_time = time (NULL); - { - unsigned long entry ; - entry = bfd_get_start_address(loadfile_bfd) ; - printf_filtered ("Start address 0x%lx , load size %d\n", entry,data_count); - /* We were doing this in remote-mips.c, I suspect it is right - for other targets too. */ - write_pc (entry); - } - - /* FIXME: are we supposed to call symbol_file_add or not? According to - a comment from remote-mips.c (where a call to symbol_file_add was - commented out), making the call confuses GDB if more than one file is - loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c - does. */ - - report_transfer_performance (data_count, start_time, end_time); - - do_cleanups (old_cleanups); -} - -/* Report how fast the transfer went. */ - -void -report_transfer_performance (data_count, start_time, end_time) -unsigned long data_count; -time_t start_time, end_time; -{ - printf_filtered ("Transfer rate: "); - if (end_time != start_time) - printf_filtered ("%d bits/sec", - (data_count * 8) / (end_time - start_time)); - else - printf_filtered ("%d bits in <1 sec", (data_count * 8)); - printf_filtered (".\n"); -} - -/* This function allows the addition of incrementally linked object files. - It does not modify any state in the target, only in the debugger. */ - -/* ARGSUSED */ -static void -add_symbol_file_command (args, from_tty) - char *args; - int from_tty; -{ - char *name = NULL; - CORE_ADDR text_addr; - char *arg; - int readnow = 0; - int mapped = 0; - - dont_repeat (); - - if (args == NULL) - { - error ("add-symbol-file takes a file name and an address"); - } - - /* Make a copy of the string that we can safely write into. */ - - args = strdup (args); - make_cleanup (free, args); - - /* Pick off any -option args and the file name. */ - - while ((*args != '\000') && (name == NULL)) - { - while (isspace (*args)) {args++;} - arg = args; - while ((*args != '\000') && !isspace (*args)) {args++;} - if (*args != '\000') - { - *args++ = '\000'; - } - if (*arg != '-') - { - name = arg; - } - else if (STREQ (arg, "-mapped")) - { - mapped = 1; - } - else if (STREQ (arg, "-readnow")) - { - readnow = 1; - } - else - { - error ("unknown option `%s'", arg); - } - } - - /* After picking off any options and the file name, args should be - left pointing at the remainder of the command line, which should - be the address expression to evaluate. */ - - if (name == NULL) - { - error ("add-symbol-file takes a file name"); - } - name = tilde_expand (name); - make_cleanup (free, name); - - if (*args != '\000') - { - text_addr = parse_and_eval_address (args); - } - else - { - target_link(name, &text_addr); - if (text_addr == (CORE_ADDR)-1) - error("Don't know how to get text start location for this file"); - } - - /* FIXME-32x64: Assumes text_addr fits in a long. */ - if ((from_tty) - && (!query ("add symbol table from file \"%s\" at text_addr = %s?\n", - name, local_hex_string ((unsigned long)text_addr)))) - error ("Not confirmed."); - - symbol_file_add (name, from_tty, text_addr, 0, mapped, readnow, - 1, /* user_loaded */ - 0); /* We'll guess it's ! is_solib */ - - /* Getting new symbols may change our opinion about what is - frameless. */ - reinit_frame_cache (); -} - -static void -add_shared_symbol_files_command (args, from_tty) - char *args; - int from_tty; -{ -#ifdef ADD_SHARED_SYMBOL_FILES - ADD_SHARED_SYMBOL_FILES (args, from_tty); -#else - error ("This command is not available in this configuration of GDB."); -#endif -} - -/* Re-read symbols if a symbol-file has changed. */ -void -reread_symbols () -{ - struct objfile *objfile; - long new_modtime; - int reread_one = 0; - struct stat new_statbuf; - int res; - - /* With the addition of shared libraries, this should be modified, - the load time should be saved in the partial symbol tables, since - different tables may come from different source files. FIXME. - This routine should then walk down each partial symbol table - and see if the symbol table that it originates from has been changed */ - - for (objfile = object_files; objfile; objfile = objfile->next) { - if (objfile->obfd) { -#ifdef IBM6000_TARGET - /* If this object is from a shared library, then you should - stat on the library name, not member name. */ - - if (objfile->obfd->my_archive) - res = stat (objfile->obfd->my_archive->filename, &new_statbuf); - else -#endif - res = stat (objfile->name, &new_statbuf); - if (res != 0) { - /* FIXME, should use print_sys_errmsg but it's not filtered. */ - printf_filtered ("`%s' has disappeared; keeping its symbols.\n", - objfile->name); - continue; - } - new_modtime = new_statbuf.st_mtime; - if (new_modtime != objfile->mtime) - { - struct cleanup *old_cleanups; - struct section_offsets *offsets; - int num_offsets; - int section_offsets_size; - char *obfd_filename; - - printf_filtered ("`%s' has changed; re-reading symbols.\n", - objfile->name); - - /* There are various functions like symbol_file_add, - symfile_bfd_open, syms_from_objfile, etc., which might - appear to do what we want. But they have various other - effects which we *don't* want. So we just do stuff - ourselves. We don't worry about mapped files (for one thing, - any mapped file will be out of date). */ - - /* If we get an error, blow away this objfile (not sure if - that is the correct response for things like shared - libraries). */ - old_cleanups = make_cleanup ((make_cleanup_func) free_objfile, - objfile); - /* We need to do this whenever any symbols go away. */ - make_cleanup ((make_cleanup_func) clear_symtab_users, 0); - - /* Clean up any state BFD has sitting around. We don't need - to close the descriptor but BFD lacks a way of closing the - BFD without closing the descriptor. */ - obfd_filename = bfd_get_filename (objfile->obfd); - if (!bfd_close (objfile->obfd)) - error ("Can't close BFD for %s: %s", objfile->name, - bfd_errmsg (bfd_get_error ())); - objfile->obfd = bfd_openr (obfd_filename, gnutarget); - if (objfile->obfd == NULL) - error ("Can't open %s to read symbols.", objfile->name); - /* bfd_openr sets cacheable to true, which is what we want. */ - if (!bfd_check_format (objfile->obfd, bfd_object)) - error ("Can't read symbols from %s: %s.", objfile->name, - bfd_errmsg (bfd_get_error ())); - - /* Save the offsets, we will nuke them with the rest of the - psymbol_obstack. */ - num_offsets = objfile->num_sections; - section_offsets_size = - sizeof (struct section_offsets) - + sizeof (objfile->section_offsets->offsets) * num_offsets; - offsets = (struct section_offsets *) alloca (section_offsets_size); - memcpy (offsets, objfile->section_offsets, section_offsets_size); - - /* Nuke all the state that we will re-read. Much of the following - code which sets things to NULL really is necessary to tell - other parts of GDB that there is nothing currently there. */ - - /* FIXME: Do we have to free a whole linked list, or is this - enough? */ - if (objfile->global_psymbols.list) - mfree (objfile->md, objfile->global_psymbols.list); - memset (&objfile -> global_psymbols, 0, - sizeof (objfile -> global_psymbols)); - if (objfile->static_psymbols.list) - mfree (objfile->md, objfile->static_psymbols.list); - memset (&objfile -> static_psymbols, 0, - sizeof (objfile -> static_psymbols)); - - /* Free the obstacks for non-reusable objfiles */ - obstack_free (&objfile -> psymbol_cache.cache, 0); - memset (&objfile -> psymbol_cache, 0, - sizeof (objfile -> psymbol_cache)); - obstack_free (&objfile -> psymbol_obstack, 0); - obstack_free (&objfile -> symbol_obstack, 0); - obstack_free (&objfile -> type_obstack, 0); - objfile->sections = NULL; - objfile->symtabs = NULL; - objfile->psymtabs = NULL; - objfile->free_psymtabs = NULL; - objfile->msymbols = NULL; - objfile->minimal_symbol_count= 0; - objfile->fundamental_types = NULL; - if (objfile -> sf != NULL) - { - (*objfile -> sf -> sym_finish) (objfile); - } - - /* We never make this a mapped file. */ - objfile -> md = NULL; - /* obstack_specify_allocation also initializes the obstack so - it is empty. */ - obstack_specify_allocation (&objfile -> psymbol_cache.cache, 0, 0, - xmalloc, free); - obstack_specify_allocation (&objfile -> psymbol_obstack, 0, 0, - xmalloc, free); - obstack_specify_allocation (&objfile -> symbol_obstack, 0, 0, - xmalloc, free); - obstack_specify_allocation (&objfile -> type_obstack, 0, 0, - xmalloc, free); - if (build_objfile_section_table (objfile)) - { - error ("Can't find the file sections in `%s': %s", - objfile -> name, bfd_errmsg (bfd_get_error ())); - } - - /* We use the same section offsets as from last time. I'm not - sure whether that is always correct for shared libraries. */ - objfile->section_offsets = (struct section_offsets *) - obstack_alloc (&objfile -> psymbol_obstack, section_offsets_size); - memcpy (objfile->section_offsets, offsets, section_offsets_size); - objfile->num_sections = num_offsets; - - /* What the hell is sym_new_init for, anyway? The concept of - distinguishing between the main file and additional files - in this way seems rather dubious. */ - if (objfile == symfile_objfile) - { - (*objfile->sf->sym_new_init) (objfile); -#ifdef HPUXHPPA - RESET_HP_UX_GLOBALS (); -#endif - } - - (*objfile->sf->sym_init) (objfile); - clear_complaints (1, 1); - /* The "mainline" parameter is a hideous hack; I think leaving it - zero is OK since dbxread.c also does what it needs to do if - objfile->global_psymbols.size is 0. */ - (*objfile->sf->sym_read) (objfile, objfile->section_offsets, 0); - if (!have_partial_symbols () && !have_full_symbols ()) - { - wrap_here (""); - printf_filtered ("(no debugging symbols found)\n"); - wrap_here (""); - } - objfile -> flags |= OBJF_SYMS; - - /* We're done reading the symbol file; finish off complaints. */ - clear_complaints (0, 1); - - /* Getting new symbols may change our opinion about what is - frameless. */ - - reinit_frame_cache (); - - /* Discard cleanups as symbol reading was successful. */ - discard_cleanups (old_cleanups); - - /* If the mtime has changed between the time we set new_modtime - and now, we *want* this to be out of date, so don't call stat - again now. */ - objfile->mtime = new_modtime; - reread_one = 1; - - /* Call this after reading in a new symbol table to give target - dependant code a crack at the new symbols. For instance, this - could be used to update the values of target-specific symbols GDB - needs to keep track of (such as _sigtramp, or whatever). */ - - TARGET_SYMFILE_POSTREAD (objfile); - } - } - } - - if (reread_one) - clear_symtab_users (); -} - - - -typedef struct { - char *ext; - enum language lang; -} filename_language; - -static filename_language * filename_language_table; -static int fl_table_size, fl_table_next; - -static void -add_filename_language (ext, lang) - char *ext; - enum language lang; -{ - if (fl_table_next >= fl_table_size) - { - fl_table_size += 10; - filename_language_table = realloc (filename_language_table, - fl_table_size); - } - - filename_language_table[fl_table_next].ext = strsave (ext); - filename_language_table[fl_table_next].lang = lang; - fl_table_next++; -} - -static char *ext_args; - -static void -set_ext_lang_command (args, from_tty) - char *args; - int from_tty; -{ - int i; - char *cp = ext_args; - enum language lang; - - /* First arg is filename extension, starting with '.' */ - if (*cp != '.') - error ("'%s': Filename extension must begin with '.'", ext_args); - - /* Find end of first arg. */ - while (*cp && !isspace (*cp)) - cp++; - - if (*cp == '\0') - error ("'%s': two arguments required -- filename extension and language", - ext_args); - - /* Null-terminate first arg */ - *cp++ = '\0'; - - /* Find beginning of second arg, which should be a source language. */ - while (*cp && isspace (*cp)) - cp++; - - if (*cp == '\0') - error ("'%s': two arguments required -- filename extension and language", - ext_args); - - /* Lookup the language from among those we know. */ - lang = language_enum (cp); - - /* Now lookup the filename extension: do we already know it? */ - for (i = 0; i < fl_table_next; i++) - if (0 == strcmp (ext_args, filename_language_table[i].ext)) - break; - - if (i >= fl_table_next) - { - /* new file extension */ - add_filename_language (ext_args, lang); - } - else - { - /* redefining a previously known filename extension */ - - /* if (from_tty) */ - /* query ("Really make files of type %s '%s'?", */ - /* ext_args, language_str (lang)); */ - - free (filename_language_table[i].ext); - filename_language_table[i].ext = strsave (ext_args); - filename_language_table[i].lang = lang; - } -} - -static void -info_ext_lang_command (args, from_tty) - char *args; - int from_tty; -{ - int i; - - printf_filtered ("Filename extensions and the languages they represent:"); - printf_filtered ("\n\n"); - for (i = 0; i < fl_table_next; i++) - printf_filtered ("\t%s\t- %s\n", - filename_language_table[i].ext, - language_str (filename_language_table[i].lang)); -} - -static void -init_filename_language_table () -{ - if (fl_table_size == 0) /* protect against repetition */ - { - fl_table_size = 20; - fl_table_next = 0; - filename_language_table = - xmalloc (fl_table_size * sizeof (*filename_language_table)); - add_filename_language (".c", language_c); - add_filename_language (".C", language_cplus); - add_filename_language (".cc", language_cplus); - add_filename_language (".cp", language_cplus); - add_filename_language (".cpp", language_cplus); - add_filename_language (".cxx", language_cplus); - add_filename_language (".c++", language_cplus); - /* start-sanitize-java */ - add_filename_language (".java", language_java); - add_filename_language (".class", language_java); - /* end-sanitize-java */ - add_filename_language (".ch", language_chill); - add_filename_language (".c186", language_chill); - add_filename_language (".c286", language_chill); - add_filename_language (".f", language_fortran); - add_filename_language (".F", language_fortran); - add_filename_language (".s", language_asm); - add_filename_language (".S", language_asm); - } -} - -enum language -deduce_language_from_filename (filename) - char *filename; -{ - int i; - char *cp; - - if (filename != NULL) - if ((cp = strrchr (filename, '.')) != NULL) - for (i = 0; i < fl_table_next; i++) - if (strcmp (cp, filename_language_table[i].ext) == 0) - return filename_language_table[i].lang; - - return language_unknown; -} - -/* allocate_symtab: - - Allocate and partly initialize a new symbol table. Return a pointer - to it. error() if no space. - - Caller must set these fields: - LINETABLE(symtab) - symtab->blockvector - symtab->dirname - symtab->free_code - symtab->free_ptr - possibly free_named_symtabs (symtab->filename); - */ - -struct symtab * -allocate_symtab (filename, objfile) - char *filename; - struct objfile *objfile; -{ - register struct symtab *symtab; - - symtab = (struct symtab *) - obstack_alloc (&objfile -> symbol_obstack, sizeof (struct symtab)); - memset (symtab, 0, sizeof (*symtab)); - symtab -> filename = obsavestring (filename, strlen (filename), - &objfile -> symbol_obstack); - symtab -> fullname = NULL; - symtab -> language = deduce_language_from_filename (filename); - symtab -> debugformat = obsavestring ("unknown", 7, - &objfile -> symbol_obstack); - - /* Hook it to the objfile it comes from */ - - symtab -> objfile = objfile; - symtab -> next = objfile -> symtabs; - objfile -> symtabs = symtab; - - /* FIXME: This should go away. It is only defined for the Z8000, - and the Z8000 definition of this macro doesn't have anything to - do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just - here for convenience. */ -#ifdef INIT_EXTRA_SYMTAB_INFO - INIT_EXTRA_SYMTAB_INFO (symtab); -#endif - - return (symtab); -} - -struct partial_symtab * -allocate_psymtab (filename, objfile) - char *filename; - struct objfile *objfile; -{ - struct partial_symtab *psymtab; - - if (objfile -> free_psymtabs) - { - psymtab = objfile -> free_psymtabs; - objfile -> free_psymtabs = psymtab -> next; - } - else - psymtab = (struct partial_symtab *) - obstack_alloc (&objfile -> psymbol_obstack, - sizeof (struct partial_symtab)); - - memset (psymtab, 0, sizeof (struct partial_symtab)); - psymtab -> filename = obsavestring (filename, strlen (filename), - &objfile -> psymbol_obstack); - psymtab -> symtab = NULL; - - /* Prepend it to the psymtab list for the objfile it belongs to. - Psymtabs are searched in most recent inserted -> least recent - inserted order. */ - - psymtab -> objfile = objfile; - psymtab -> next = objfile -> psymtabs; - objfile -> psymtabs = psymtab; -#if 0 - { - struct partial_symtab **prev_pst; - psymtab -> objfile = objfile; - psymtab -> next = NULL; - prev_pst = &(objfile -> psymtabs); - while ((*prev_pst) != NULL) - prev_pst = &((*prev_pst) -> next); - (*prev_pst) = psymtab; - } -#endif - - return (psymtab); -} - -void -discard_psymtab (pst) - struct partial_symtab *pst; -{ - struct partial_symtab **prev_pst; - - /* From dbxread.c: - Empty psymtabs happen as a result of header files which don't - have any symbols in them. There can be a lot of them. But this - check is wrong, in that a psymtab with N_SLINE entries but - nothing else is not empty, but we don't realize that. Fixing - that without slowing things down might be tricky. */ - - /* First, snip it out of the psymtab chain */ - - prev_pst = &(pst->objfile->psymtabs); - while ((*prev_pst) != pst) - prev_pst = &((*prev_pst)->next); - (*prev_pst) = pst->next; - - /* Next, put it on a free list for recycling */ - - pst->next = pst->objfile->free_psymtabs; - pst->objfile->free_psymtabs = pst; -} - - -/* Reset all data structures in gdb which may contain references to symbol - table data. */ - -void -clear_symtab_users () -{ - /* Someday, we should do better than this, by only blowing away - the things that really need to be blown. */ - clear_value_history (); - clear_displays (); - clear_internalvars (); - breakpoint_re_set (); - set_default_breakpoint (0, 0, 0, 0); - current_source_symtab = 0; - current_source_line = 0; - clear_pc_function_cache (); - target_new_objfile (NULL); -} - -/* clear_symtab_users_once: - - This function is run after symbol reading, or from a cleanup. - If an old symbol table was obsoleted, the old symbol table - has been blown away, but the other GDB data structures that may - reference it have not yet been cleared or re-directed. (The old - symtab was zapped, and the cleanup queued, in free_named_symtab() - below.) - - This function can be queued N times as a cleanup, or called - directly; it will do all the work the first time, and then will be a - no-op until the next time it is queued. This works by bumping a - counter at queueing time. Much later when the cleanup is run, or at - the end of symbol processing (in case the cleanup is discarded), if - the queued count is greater than the "done-count", we do the work - and set the done-count to the queued count. If the queued count is - less than or equal to the done-count, we just ignore the call. This - is needed because reading a single .o file will often replace many - symtabs (one per .h file, for example), and we don't want to reset - the breakpoints N times in the user's face. - - The reason we both queue a cleanup, and call it directly after symbol - reading, is because the cleanup protects us in case of errors, but is - discarded if symbol reading is successful. */ - -#if 0 -/* FIXME: As free_named_symtabs is currently a big noop this function - is no longer needed. */ -static void -clear_symtab_users_once PARAMS ((void)); - -static int clear_symtab_users_queued; -static int clear_symtab_users_done; - -static void -clear_symtab_users_once () -{ - /* Enforce once-per-`do_cleanups'-semantics */ - if (clear_symtab_users_queued <= clear_symtab_users_done) - return; - clear_symtab_users_done = clear_symtab_users_queued; - - clear_symtab_users (); -} -#endif - -/* Delete the specified psymtab, and any others that reference it. */ - -static void -cashier_psymtab (pst) - struct partial_symtab *pst; -{ - struct partial_symtab *ps, *pprev = NULL; - int i; - - /* Find its previous psymtab in the chain */ - for (ps = pst->objfile->psymtabs; ps; ps = ps->next) { - if (ps == pst) - break; - pprev = ps; - } - - if (ps) { - /* Unhook it from the chain. */ - if (ps == pst->objfile->psymtabs) - pst->objfile->psymtabs = ps->next; - else - pprev->next = ps->next; - - /* FIXME, we can't conveniently deallocate the entries in the - partial_symbol lists (global_psymbols/static_psymbols) that - this psymtab points to. These just take up space until all - the psymtabs are reclaimed. Ditto the dependencies list and - filename, which are all in the psymbol_obstack. */ - - /* We need to cashier any psymtab that has this one as a dependency... */ -again: - for (ps = pst->objfile->psymtabs; ps; ps = ps->next) { - for (i = 0; i < ps->number_of_dependencies; i++) { - if (ps->dependencies[i] == pst) { - cashier_psymtab (ps); - goto again; /* Must restart, chain has been munged. */ - } - } - } - } -} - -/* If a symtab or psymtab for filename NAME is found, free it along - with any dependent breakpoints, displays, etc. - Used when loading new versions of object modules with the "add-file" - command. This is only called on the top-level symtab or psymtab's name; - it is not called for subsidiary files such as .h files. - - Return value is 1 if we blew away the environment, 0 if not. - FIXME. The return valu appears to never be used. - - FIXME. I think this is not the best way to do this. We should - work on being gentler to the environment while still cleaning up - all stray pointers into the freed symtab. */ - -int -free_named_symtabs (name) - char *name; -{ -#if 0 - /* FIXME: With the new method of each objfile having it's own - psymtab list, this function needs serious rethinking. In particular, - why was it ever necessary to toss psymtabs with specific compilation - unit filenames, as opposed to all psymtabs from a particular symbol - file? -- fnf - Well, the answer is that some systems permit reloading of particular - compilation units. We want to blow away any old info about these - compilation units, regardless of which objfiles they arrived in. --gnu. */ - - register struct symtab *s; - register struct symtab *prev; - register struct partial_symtab *ps; - struct blockvector *bv; - int blewit = 0; - - /* We only wack things if the symbol-reload switch is set. */ - if (!symbol_reloading) - return 0; - - /* Some symbol formats have trouble providing file names... */ - if (name == 0 || *name == '\0') - return 0; - - /* Look for a psymtab with the specified name. */ - -again2: - for (ps = partial_symtab_list; ps; ps = ps->next) { - if (STREQ (name, ps->filename)) { - cashier_psymtab (ps); /* Blow it away...and its little dog, too. */ - goto again2; /* Must restart, chain has been munged */ - } - } - - /* Look for a symtab with the specified name. */ - - for (s = symtab_list; s; s = s->next) - { - if (STREQ (name, s->filename)) - break; - prev = s; - } - - if (s) - { - if (s == symtab_list) - symtab_list = s->next; - else - prev->next = s->next; - - /* For now, queue a delete for all breakpoints, displays, etc., whether - or not they depend on the symtab being freed. This should be - changed so that only those data structures affected are deleted. */ - - /* But don't delete anything if the symtab is empty. - This test is necessary due to a bug in "dbxread.c" that - causes empty symtabs to be created for N_SO symbols that - contain the pathname of the object file. (This problem - has been fixed in GDB 3.9x). */ - - bv = BLOCKVECTOR (s); - if (BLOCKVECTOR_NBLOCKS (bv) > 2 - || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)) - || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK))) - { - complain (&oldsyms_complaint, name); - - clear_symtab_users_queued++; - make_cleanup (clear_symtab_users_once, 0); - blewit = 1; - } else { - complain (&empty_symtab_complaint, name); - } - - free_symtab (s); - } - else - { - /* It is still possible that some breakpoints will be affected - even though no symtab was found, since the file might have - been compiled without debugging, and hence not be associated - with a symtab. In order to handle this correctly, we would need - to keep a list of text address ranges for undebuggable files. - For now, we do nothing, since this is a fairly obscure case. */ - ; - } - - /* FIXME, what about the minimal symbol table? */ - return blewit; -#else - return (0); -#endif -} - -/* Allocate and partially fill a partial symtab. It will be - completely filled at the end of the symbol list. - - SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR - is the address relative to which its symbols are (incremental) or 0 - (normal). */ - - -struct partial_symtab * -start_psymtab_common (objfile, section_offsets, - filename, textlow, global_syms, static_syms) - struct objfile *objfile; - struct section_offsets *section_offsets; - char *filename; - CORE_ADDR textlow; - struct partial_symbol **global_syms; - struct partial_symbol **static_syms; -{ - struct partial_symtab *psymtab; - - psymtab = allocate_psymtab (filename, objfile); - psymtab -> section_offsets = section_offsets; - psymtab -> textlow = textlow; - psymtab -> texthigh = psymtab -> textlow; /* default */ - psymtab -> globals_offset = global_syms - objfile -> global_psymbols.list; - psymtab -> statics_offset = static_syms - objfile -> static_psymbols.list; - return (psymtab); -} - -/* Add a symbol with a long value to a psymtab. - Since one arg is a struct, we pass in a ptr and deref it (sigh). */ - -void -add_psymbol_to_list (name, namelength, namespace, class, list, val, coreaddr, - language, objfile) - char *name; - int namelength; - namespace_enum namespace; - enum address_class class; - struct psymbol_allocation_list *list; - long val; /* Value as a long */ - CORE_ADDR coreaddr; /* Value as a CORE_ADDR */ - enum language language; - struct objfile *objfile; -{ - register struct partial_symbol *psym; - char *buf = alloca (namelength + 1); - /* psymbol is static so that there will be no uninitialized gaps in the - structure which might contain random data, causing cache misses in - bcache. */ - static struct partial_symbol psymbol; - - /* Create local copy of the partial symbol */ - memcpy (buf, name, namelength); - buf[namelength] = '\0'; - SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache); - /* val and coreaddr are mutually exclusive, one of them *will* be zero */ - if (val != 0) - { - SYMBOL_VALUE (&psymbol) = val; - } - else - { - SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr; - } - SYMBOL_SECTION (&psymbol) = 0; - SYMBOL_LANGUAGE (&psymbol) = language; - PSYMBOL_NAMESPACE (&psymbol) = namespace; - PSYMBOL_CLASS (&psymbol) = class; - SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language); - - /* Stash the partial symbol away in the cache */ - psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache); - - /* Save pointer to partial symbol in psymtab, growing symtab if needed. */ - if (list->next >= list->list + list->size) - { - extend_psymbol_list (list, objfile); - } - *list->next++ = psym; - OBJSTAT (objfile, n_psyms++); -} - -/* Add a symbol with a long value to a psymtab. This differs from - * add_psymbol_to_list above in taking both a mangled and a demangled - * name. */ - -void -add_psymbol_with_dem_name_to_list (name, namelength, dem_name, dem_namelength, - namespace, class, list, val, coreaddr, language, objfile) - char *name; - int namelength; - char *dem_name; - int dem_namelength; - namespace_enum namespace; - enum address_class class; - struct psymbol_allocation_list *list; - long val; /* Value as a long */ - CORE_ADDR coreaddr; /* Value as a CORE_ADDR */ - enum language language; - struct objfile *objfile; -{ - register struct partial_symbol *psym; - char *buf = alloca (namelength + 1); - /* psymbol is static so that there will be no uninitialized gaps in the - structure which might contain random data, causing cache misses in - bcache. */ - static struct partial_symbol psymbol; - - /* Create local copy of the partial symbol */ - - memcpy (buf, name, namelength); - buf[namelength] = '\0'; - SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache); - - buf = alloca (dem_namelength + 1); - memcpy (buf, dem_name, dem_namelength); - buf[dem_namelength] = '\0'; - - switch (language) - { - case language_c: - case language_cplus: - SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) = - bcache (buf, dem_namelength + 1, &objfile->psymbol_cache); - break; - case language_chill: - SYMBOL_CHILL_DEMANGLED_NAME (&psymbol) = - bcache (buf, dem_namelength + 1, &objfile->psymbol_cache); - - /* FIXME What should be done for the default case? Ignoring for now. */ - } - - /* val and coreaddr are mutually exclusive, one of them *will* be zero */ - if (val != 0) - { - SYMBOL_VALUE (&psymbol) = val; - } - else - { - SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr; - } - SYMBOL_SECTION (&psymbol) = 0; - SYMBOL_LANGUAGE (&psymbol) = language; - PSYMBOL_NAMESPACE (&psymbol) = namespace; - PSYMBOL_CLASS (&psymbol) = class; - SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language); - - /* Stash the partial symbol away in the cache */ - psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache); - - /* Save pointer to partial symbol in psymtab, growing symtab if needed. */ - if (list->next >= list->list + list->size) - { - extend_psymbol_list (list, objfile); - } - *list->next++ = psym; - OBJSTAT (objfile, n_psyms++); -} - -/* Initialize storage for partial symbols. */ - -void -init_psymbol_list (objfile, total_symbols) - struct objfile *objfile; - int total_symbols; -{ - /* Free any previously allocated psymbol lists. */ - - if (objfile -> global_psymbols.list) - { - mfree (objfile -> md, (PTR)objfile -> global_psymbols.list); - } - if (objfile -> static_psymbols.list) - { - mfree (objfile -> md, (PTR)objfile -> static_psymbols.list); - } - - /* Current best guess is that approximately a twentieth - of the total symbols (in a debugging file) are global or static - oriented symbols */ - - objfile -> global_psymbols.size = total_symbols / 10; - objfile -> static_psymbols.size = total_symbols / 10; - - if (objfile -> global_psymbols.size > 0) - { - objfile -> global_psymbols.next = - objfile -> global_psymbols.list = (struct partial_symbol **) - xmmalloc (objfile -> md, (objfile -> global_psymbols.size - * sizeof (struct partial_symbol *))); - } - if (objfile -> static_psymbols.size > 0) - { - objfile -> static_psymbols.next = - objfile -> static_psymbols.list = (struct partial_symbol **) - xmmalloc (objfile -> md, (objfile -> static_psymbols.size - * sizeof (struct partial_symbol *))); - } -} - -/* OVERLAYS: - The following code implements an abstraction for debugging overlay sections. - - The target model is as follows: - 1) The gnu linker will permit multiple sections to be mapped into the - same VMA, each with its own unique LMA (or load address). - 2) It is assumed that some runtime mechanism exists for mapping the - sections, one by one, from the load address into the VMA address. - 3) This code provides a mechanism for gdb to keep track of which - sections should be considered to be mapped from the VMA to the LMA. - This information is used for symbol lookup, and memory read/write. - For instance, if a section has been mapped then its contents - should be read from the VMA, otherwise from the LMA. - - Two levels of debugger support for overlays are available. One is - "manual", in which the debugger relies on the user to tell it which - overlays are currently mapped. This level of support is - implemented entirely in the core debugger, and the information about - whether a section is mapped is kept in the objfile->obj_section table. - - The second level of support is "automatic", and is only available if - the target-specific code provides functionality to read the target's - overlay mapping table, and translate its contents for the debugger - (by updating the mapped state information in the obj_section tables). - - The interface is as follows: - User commands: - overlay map <name> -- tell gdb to consider this section mapped - overlay unmap <name> -- tell gdb to consider this section unmapped - overlay list -- list the sections that GDB thinks are mapped - overlay read-target -- get the target's state of what's mapped - overlay off/manual/auto -- set overlay debugging state - Functional interface: - find_pc_mapped_section(pc): if the pc is in the range of a mapped - section, return that section. - find_pc_overlay(pc): find any overlay section that contains - the pc, either in its VMA or its LMA - overlay_is_mapped(sect): true if overlay is marked as mapped - section_is_overlay(sect): true if section's VMA != LMA - pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA - pc_in_unmapped_range(...): true if pc belongs to section's LMA - overlay_mapped_address(...): map an address from section's LMA to VMA - overlay_unmapped_address(...): map an address from section's VMA to LMA - symbol_overlayed_address(...): Return a "current" address for symbol: - either in VMA or LMA depending on whether - the symbol's section is currently mapped - */ - -/* Overlay debugging state: */ - -int overlay_debugging = 0; /* 0 == off, 1 == manual, -1 == auto */ -int overlay_cache_invalid = 0; /* True if need to refresh mapped state */ - -/* Target vector for refreshing overlay mapped state */ -static void simple_overlay_update PARAMS ((struct obj_section *)); -void (*target_overlay_update) PARAMS ((struct obj_section *)) - = simple_overlay_update; - -/* Function: section_is_overlay (SECTION) - Returns true if SECTION has VMA not equal to LMA, ie. - SECTION is loaded at an address different from where it will "run". */ - -int -section_is_overlay (section) - asection *section; -{ - if (overlay_debugging) - if (section && section->lma != 0 && - section->vma != section->lma) - return 1; - - return 0; -} - -/* Function: overlay_invalidate_all (void) - Invalidate the mapped state of all overlay sections (mark it as stale). */ - -static void -overlay_invalidate_all () -{ - struct objfile *objfile; - struct obj_section *sect; - - ALL_OBJSECTIONS (objfile, sect) - if (section_is_overlay (sect->the_bfd_section)) - sect->ovly_mapped = -1; -} - -/* Function: overlay_is_mapped (SECTION) - Returns true if section is an overlay, and is currently mapped. - Private: public access is thru function section_is_mapped. - - Access to the ovly_mapped flag is restricted to this function, so - that we can do automatic update. If the global flag - OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call - overlay_invalidate_all. If the mapped state of the particular - section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */ - -static int -overlay_is_mapped (osect) - struct obj_section *osect; -{ - if (osect == 0 || !section_is_overlay (osect->the_bfd_section)) - return 0; - - switch (overlay_debugging) - { - default: - case 0: return 0; /* overlay debugging off */ - case -1: /* overlay debugging automatic */ - /* Unles there is a target_overlay_update function, - there's really nothing useful to do here (can't really go auto) */ - if (target_overlay_update) - { - if (overlay_cache_invalid) - { - overlay_invalidate_all (); - overlay_cache_invalid = 0; - } - if (osect->ovly_mapped == -1) - (*target_overlay_update) (osect); - } - /* fall thru to manual case */ - case 1: /* overlay debugging manual */ - return osect->ovly_mapped == 1; - } -} - -/* Function: section_is_mapped - Returns true if section is an overlay, and is currently mapped. */ - -int -section_is_mapped (section) - asection *section; -{ - struct objfile *objfile; - struct obj_section *osect; - - if (overlay_debugging) - if (section && section_is_overlay (section)) - ALL_OBJSECTIONS (objfile, osect) - if (osect->the_bfd_section == section) - return overlay_is_mapped (osect); - - return 0; -} - -/* Function: pc_in_unmapped_range - If PC falls into the lma range of SECTION, return true, else false. */ - -CORE_ADDR -pc_in_unmapped_range (pc, section) - CORE_ADDR pc; - asection *section; -{ - int size; - - if (overlay_debugging) - if (section && section_is_overlay (section)) - { - size = bfd_get_section_size_before_reloc (section); - if (section->lma <= pc && pc < section->lma + size) - return 1; - } - return 0; -} - -/* Function: pc_in_mapped_range - If PC falls into the vma range of SECTION, return true, else false. */ - -CORE_ADDR -pc_in_mapped_range (pc, section) - CORE_ADDR pc; - asection *section; -{ - int size; - - if (overlay_debugging) - if (section && section_is_overlay (section)) - { - size = bfd_get_section_size_before_reloc (section); - if (section->vma <= pc && pc < section->vma + size) - return 1; - } - return 0; -} - -/* Function: overlay_unmapped_address (PC, SECTION) - Returns the address corresponding to PC in the unmapped (load) range. - May be the same as PC. */ - -CORE_ADDR -overlay_unmapped_address (pc, section) - CORE_ADDR pc; - asection *section; -{ - if (overlay_debugging) - if (section && section_is_overlay (section) && - pc_in_mapped_range (pc, section)) - return pc + section->lma - section->vma; - - return pc; -} - -/* Function: overlay_mapped_address (PC, SECTION) - Returns the address corresponding to PC in the mapped (runtime) range. - May be the same as PC. */ - -CORE_ADDR -overlay_mapped_address (pc, section) - CORE_ADDR pc; - asection *section; -{ - if (overlay_debugging) - if (section && section_is_overlay (section) && - pc_in_unmapped_range (pc, section)) - return pc + section->vma - section->lma; - - return pc; -} - - -/* Function: symbol_overlayed_address - Return one of two addresses (relative to the VMA or to the LMA), - depending on whether the section is mapped or not. */ - -CORE_ADDR -symbol_overlayed_address (address, section) - CORE_ADDR address; - asection *section; -{ - if (overlay_debugging) - { - /* If the symbol has no section, just return its regular address. */ - if (section == 0) - return address; - /* If the symbol's section is not an overlay, just return its address */ - if (!section_is_overlay (section)) - return address; - /* If the symbol's section is mapped, just return its address */ - if (section_is_mapped (section)) - return address; - /* - * HOWEVER: if the symbol is in an overlay section which is NOT mapped, - * then return its LOADED address rather than its vma address!! - */ - return overlay_unmapped_address (address, section); - } - return address; -} - -/* Function: find_pc_overlay (PC) - Return the best-match overlay section for PC: - If PC matches a mapped overlay section's VMA, return that section. - Else if PC matches an unmapped section's VMA, return that section. - Else if PC matches an unmapped section's LMA, return that section. */ - -asection * -find_pc_overlay (pc) - CORE_ADDR pc; -{ - struct objfile *objfile; - struct obj_section *osect, *best_match = NULL; - - if (overlay_debugging) - ALL_OBJSECTIONS (objfile, osect) - if (section_is_overlay (osect->the_bfd_section)) - { - if (pc_in_mapped_range (pc, osect->the_bfd_section)) - { - if (overlay_is_mapped (osect)) - return osect->the_bfd_section; - else - best_match = osect; - } - else if (pc_in_unmapped_range (pc, osect->the_bfd_section)) - best_match = osect; - } - return best_match ? best_match->the_bfd_section : NULL; -} - -/* Function: find_pc_mapped_section (PC) - If PC falls into the VMA address range of an overlay section that is - currently marked as MAPPED, return that section. Else return NULL. */ - -asection * -find_pc_mapped_section (pc) - CORE_ADDR pc; -{ - struct objfile *objfile; - struct obj_section *osect; - - if (overlay_debugging) - ALL_OBJSECTIONS (objfile, osect) - if (pc_in_mapped_range (pc, osect->the_bfd_section) && - overlay_is_mapped (osect)) - return osect->the_bfd_section; - - return NULL; -} - -/* Function: list_overlays_command - Print a list of mapped sections and their PC ranges */ - -void -list_overlays_command (args, from_tty) - char *args; - int from_tty; -{ - int nmapped = 0; - struct objfile *objfile; - struct obj_section *osect; - - if (overlay_debugging) - ALL_OBJSECTIONS (objfile, osect) - if (overlay_is_mapped (osect)) - { - const char *name; - bfd_vma lma, vma; - int size; - - vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section); - lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section); - size = bfd_get_section_size_before_reloc (osect->the_bfd_section); - name = bfd_section_name (objfile->obfd, osect->the_bfd_section); - - printf_filtered ("Section %s, loaded at ", name); - print_address_numeric (lma, 1, stdout); - puts_filtered (" - "); - print_address_numeric (lma + size, 1, stdout); - printf_filtered (", mapped at "); - print_address_numeric (vma, 1, stdout); - puts_filtered (" - "); - print_address_numeric (vma + size, 1, stdout); - puts_filtered ("\n"); - - nmapped ++; - } - if (nmapped == 0) - printf_filtered ("No sections are mapped.\n"); -} - -/* Function: map_overlay_command - Mark the named section as mapped (ie. residing at its VMA address). */ - -void -map_overlay_command (args, from_tty) - char *args; - int from_tty; -{ - struct objfile *objfile, *objfile2; - struct obj_section *sec, *sec2; - asection *bfdsec; - - if (!overlay_debugging) - error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command."); - - if (args == 0 || *args == 0) - error ("Argument required: name of an overlay section"); - - /* First, find a section matching the user supplied argument */ - ALL_OBJSECTIONS (objfile, sec) - if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) - { - /* Now, check to see if the section is an overlay. */ - bfdsec = sec->the_bfd_section; - if (!section_is_overlay (bfdsec)) - continue; /* not an overlay section */ - - /* Mark the overlay as "mapped" */ - sec->ovly_mapped = 1; - - /* Next, make a pass and unmap any sections that are - overlapped by this new section: */ - ALL_OBJSECTIONS (objfile2, sec2) - if (sec2->ovly_mapped && - sec != sec2 && - sec->the_bfd_section != sec2->the_bfd_section && - (pc_in_mapped_range (sec2->addr, sec->the_bfd_section) || - pc_in_mapped_range (sec2->endaddr, sec->the_bfd_section))) - { - if (info_verbose) - printf_filtered ("Note: section %s unmapped by overlap\n", - bfd_section_name (objfile->obfd, - sec2->the_bfd_section)); - sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */ - } - return; - } - error ("No overlay section called %s", args); -} - -/* Function: unmap_overlay_command - Mark the overlay section as unmapped - (ie. resident in its LMA address range, rather than the VMA range). */ - -void -unmap_overlay_command (args, from_tty) - char *args; - int from_tty; -{ - struct objfile *objfile; - struct obj_section *sec; - - if (!overlay_debugging) - error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command."); - - if (args == 0 || *args == 0) - error ("Argument required: name of an overlay section"); - - /* First, find a section matching the user supplied argument */ - ALL_OBJSECTIONS (objfile, sec) - if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args)) - { - if (!sec->ovly_mapped) - error ("Section %s is not mapped", args); - sec->ovly_mapped = 0; - return; - } - error ("No overlay section called %s", args); -} - -/* Function: overlay_auto_command - A utility command to turn on overlay debugging. - Possibly this should be done via a set/show command. */ - -static void -overlay_auto_command (args, from_tty) - char *args; - int from_tty; -{ - overlay_debugging = -1; - if (info_verbose) - printf_filtered ("Automatic overlay debugging enabled."); -} - -/* Function: overlay_manual_command - A utility command to turn on overlay debugging. - Possibly this should be done via a set/show command. */ - -static void -overlay_manual_command (args, from_tty) - char *args; - int from_tty; -{ - overlay_debugging = 1; - if (info_verbose) - printf_filtered ("Overlay debugging enabled."); -} - -/* Function: overlay_off_command - A utility command to turn on overlay debugging. - Possibly this should be done via a set/show command. */ - -static void -overlay_off_command (args, from_tty) - char *args; - int from_tty; -{ - overlay_debugging = 0; - if (info_verbose) - printf_filtered ("Overlay debugging disabled."); -} - -static void -overlay_load_command (args, from_tty) - char *args; - int from_tty; -{ - if (target_overlay_update) - (*target_overlay_update) (NULL); - else - error ("This target does not know how to read its overlay state."); -} - -/* Function: overlay_command - A place-holder for a mis-typed command */ - -/* Command list chain containing all defined "overlay" subcommands. */ -struct cmd_list_element *overlaylist; - -static void -overlay_command (args, from_tty) - char *args; - int from_tty; -{ - printf_unfiltered - ("\"overlay\" must be followed by the name of an overlay command.\n"); - help_list (overlaylist, "overlay ", -1, gdb_stdout); -} - - -/* Target Overlays for the "Simplest" overlay manager: - - This is GDB's default target overlay layer. It works with the - minimal overlay manager supplied as an example by Cygnus. The - entry point is via a function pointer "target_overlay_update", - so targets that use a different runtime overlay manager can - substitute their own overlay_update function and take over the - function pointer. - - The overlay_update function pokes around in the target's data structures - to see what overlays are mapped, and updates GDB's overlay mapping with - this information. - - In this simple implementation, the target data structures are as follows: - unsigned _novlys; /# number of overlay sections #/ - unsigned _ovly_table[_novlys][4] = { - {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/ - {..., ..., ..., ...}, - } - unsigned _novly_regions; /# number of overlay regions #/ - unsigned _ovly_region_table[_novly_regions][3] = { - {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/ - {..., ..., ...}, - } - These functions will attempt to update GDB's mappedness state in the - symbol section table, based on the target's mappedness state. - - To do this, we keep a cached copy of the target's _ovly_table, and - attempt to detect when the cached copy is invalidated. The main - entry point is "simple_overlay_update(SECT), which looks up SECT in - the cached table and re-reads only the entry for that section from - the target (whenever possible). - */ - -/* Cached, dynamically allocated copies of the target data structures: */ -static unsigned (*cache_ovly_table)[4] = 0; -#if 0 -static unsigned (*cache_ovly_region_table)[3] = 0; -#endif -static unsigned cache_novlys = 0; -#if 0 -static unsigned cache_novly_regions = 0; -#endif -static CORE_ADDR cache_ovly_table_base = 0; -#if 0 -static CORE_ADDR cache_ovly_region_table_base = 0; -#endif -enum ovly_index { VMA, SIZE, LMA, MAPPED}; -#define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT) - -/* Throw away the cached copy of _ovly_table */ -static void -simple_free_overlay_table () -{ - if (cache_ovly_table) - free(cache_ovly_table); - cache_novlys = 0; - cache_ovly_table = NULL; - cache_ovly_table_base = 0; -} - -#if 0 -/* Throw away the cached copy of _ovly_region_table */ -static void -simple_free_overlay_region_table () -{ - if (cache_ovly_region_table) - free(cache_ovly_region_table); - cache_novly_regions = 0; - cache_ovly_region_table = NULL; - cache_ovly_region_table_base = 0; -} -#endif - -/* Read an array of ints from the target into a local buffer. - Convert to host order. int LEN is number of ints */ -static void -read_target_long_array (memaddr, myaddr, len) - CORE_ADDR memaddr; - unsigned int *myaddr; - int len; -{ - char *buf = alloca (len * TARGET_LONG_BYTES); - int i; - - read_memory (memaddr, buf, len * TARGET_LONG_BYTES); - for (i = 0; i < len; i++) - myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf, - TARGET_LONG_BYTES); -} - -/* Find and grab a copy of the target _ovly_table - (and _novlys, which is needed for the table's size) */ -static int -simple_read_overlay_table () -{ - struct minimal_symbol *msym; - - simple_free_overlay_table (); - msym = lookup_minimal_symbol ("_novlys", 0, 0); - if (msym != NULL) - cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4); - else - return 0; /* failure */ - cache_ovly_table = (void *) xmalloc (cache_novlys * sizeof(*cache_ovly_table)); - if (cache_ovly_table != NULL) - { - msym = lookup_minimal_symbol ("_ovly_table", 0, 0); - if (msym != NULL) - { - cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (msym); - read_target_long_array (cache_ovly_table_base, - (int *) cache_ovly_table, - cache_novlys * 4); - } - else - return 0; /* failure */ - } - else - return 0; /* failure */ - return 1; /* SUCCESS */ -} - -#if 0 -/* Find and grab a copy of the target _ovly_region_table - (and _novly_regions, which is needed for the table's size) */ -static int -simple_read_overlay_region_table () -{ - struct minimal_symbol *msym; - - simple_free_overlay_region_table (); - msym = lookup_minimal_symbol ("_novly_regions", 0, 0); - if (msym != NULL) - cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4); - else - return 0; /* failure */ - cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12); - if (cache_ovly_region_table != NULL) - { - msym = lookup_minimal_symbol ("_ovly_region_table", 0, 0); - if (msym != NULL) - { - cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym); - read_target_long_array (cache_ovly_region_table_base, - (int *) cache_ovly_region_table, - cache_novly_regions * 3); - } - else - return 0; /* failure */ - } - else - return 0; /* failure */ - return 1; /* SUCCESS */ -} -#endif - -/* Function: simple_overlay_update_1 - A helper function for simple_overlay_update. Assuming a cached copy - of _ovly_table exists, look through it to find an entry whose vma, - lma and size match those of OSECT. Re-read the entry and make sure - it still matches OSECT (else the table may no longer be valid). - Set OSECT's mapped state to match the entry. Return: 1 for - success, 0 for failure. */ - -static int -simple_overlay_update_1 (osect) - struct obj_section *osect; -{ - int i, size; - - size = bfd_get_section_size_before_reloc (osect->the_bfd_section); - for (i = 0; i < cache_novlys; i++) - if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma && - cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* && - cache_ovly_table[i][SIZE] == size */) - { - read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES, - (int *) cache_ovly_table[i], 4); - if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma && - cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* && - cache_ovly_table[i][SIZE] == size */) - { - osect->ovly_mapped = cache_ovly_table[i][MAPPED]; - return 1; - } - else /* Warning! Warning! Target's ovly table has changed! */ - return 0; - } - return 0; -} - -/* Function: simple_overlay_update - If OSECT is NULL, then update all sections' mapped state - (after re-reading the entire target _ovly_table). - If OSECT is non-NULL, then try to find a matching entry in the - cached ovly_table and update only OSECT's mapped state. - If a cached entry can't be found or the cache isn't valid, then - re-read the entire cache, and go ahead and update all sections. */ - -static void -simple_overlay_update (osect) - struct obj_section *osect; -{ - struct objfile *objfile; - - /* Were we given an osect to look up? NULL means do all of them. */ - if (osect) - /* Have we got a cached copy of the target's overlay table? */ - if (cache_ovly_table != NULL) - /* Does its cached location match what's currently in the symtab? */ - if (cache_ovly_table_base == - SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", 0, 0))) - /* Then go ahead and try to look up this single section in the cache */ - if (simple_overlay_update_1 (osect)) - /* Found it! We're done. */ - return; - - /* Cached table no good: need to read the entire table anew. - Or else we want all the sections, in which case it's actually - more efficient to read the whole table in one block anyway. */ - - if (simple_read_overlay_table () == 0) /* read failed? No table? */ - { - warning ("Failed to read the target overlay mapping table."); - return; - } - /* Now may as well update all sections, even if only one was requested. */ - ALL_OBJSECTIONS (objfile, osect) - if (section_is_overlay (osect->the_bfd_section)) - { - int i, size; - - size = bfd_get_section_size_before_reloc (osect->the_bfd_section); - for (i = 0; i < cache_novlys; i++) - if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma && - cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* && - cache_ovly_table[i][SIZE] == size */) - { /* obj_section matches i'th entry in ovly_table */ - osect->ovly_mapped = cache_ovly_table[i][MAPPED]; - break; /* finished with inner for loop: break out */ - } - } -} - - -void -_initialize_symfile () -{ - struct cmd_list_element *c; - - c = add_cmd ("symbol-file", class_files, symbol_file_command, - "Load symbol table from executable file FILE.\n\ -The `file' command can also load symbol tables, as well as setting the file\n\ -to execute.", &cmdlist); - c->completer = filename_completer; - - c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command, - "Usage: add-symbol-file FILE ADDR\n\ -Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\ -ADDR is the starting address of the file's text.", - &cmdlist); - c->completer = filename_completer; - - c = add_cmd ("add-shared-symbol-files", class_files, - add_shared_symbol_files_command, - "Load the symbols from shared objects in the dynamic linker's link map.", - &cmdlist); - c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1, - &cmdlist); - - c = add_cmd ("load", class_files, load_command, - "Dynamically load FILE into the running program, and record its symbols\n\ -for access from GDB.", &cmdlist); - c->completer = filename_completer; - - add_show_from_set - (add_set_cmd ("symbol-reloading", class_support, var_boolean, - (char *)&symbol_reloading, - "Set dynamic symbol table reloading multiple times in one run.", - &setlist), - &showlist); - - add_prefix_cmd ("overlay", class_support, overlay_command, - "Commands for debugging overlays.", &overlaylist, - "overlay ", 0, &cmdlist); - - add_com_alias ("ovly", "overlay", class_alias, 1); - add_com_alias ("ov", "overlay", class_alias, 1); - - add_cmd ("map-overlay", class_support, map_overlay_command, - "Assert that an overlay section is mapped.", &overlaylist); - - add_cmd ("unmap-overlay", class_support, unmap_overlay_command, - "Assert that an overlay section is unmapped.", &overlaylist); - - add_cmd ("list-overlays", class_support, list_overlays_command, - "List mappings of overlay sections.", &overlaylist); - - add_cmd ("manual", class_support, overlay_manual_command, - "Enable overlay debugging.", &overlaylist); - add_cmd ("off", class_support, overlay_off_command, - "Disable overlay debugging.", &overlaylist); - add_cmd ("auto", class_support, overlay_auto_command, - "Enable automatic overlay debugging.", &overlaylist); - add_cmd ("load-target", class_support, overlay_load_command, - "Read the overlay mapping state from the target.", &overlaylist); - - /* Filename extension to source language lookup table: */ - init_filename_language_table (); - c = add_set_cmd ("extension-language", class_files, var_string_noescape, - (char *) &ext_args, - "Set mapping between filename extension and source language.\n\ -Usage: set extension-language .foo bar", - &setlist); - c->function.cfunc = set_ext_lang_command; - - add_info ("extensions", info_ext_lang_command, - "All filename extensions associated with a source language."); -} |