| /* Generic symbol file reading for the GNU debugger, GDB. |
| |
| Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
| 1999, 2000, 2001, 2002 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 "completer.h" |
| |
| #include <sys/types.h> |
| #include <fcntl.h> |
| #include "gdb_string.h" |
| #include "gdb_stat.h" |
| #include <ctype.h> |
| #include <time.h> |
| |
| #ifndef O_BINARY |
| #define O_BINARY 0 |
| #endif |
| |
| #ifdef HPUXHPPA |
| |
| /* 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) (const char *section, unsigned long num); |
| void (*show_load_progress) (const char *section, |
| unsigned long section_sent, |
| unsigned long section_size, |
| unsigned long total_sent, |
| unsigned long total_size); |
| void (*pre_add_symbol_hook) (char *); |
| void (*post_add_symbol_hook) (void); |
| void (*target_new_objfile_hook) (struct objfile *); |
| |
| static void clear_symtab_users_cleanup (void *ignore); |
| |
| /* 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 |
| }; |
| |
| struct complaint unknown_option_complaint = |
| { |
| "Unknown option `%s' ignored", 0, 0 |
| }; |
| |
| /* External variables and functions referenced. */ |
| |
| extern void report_transfer_performance (unsigned long, time_t, time_t); |
| |
| /* Functions this file defines */ |
| |
| #if 0 |
| static int simple_read_overlay_region_table (void); |
| static void simple_free_overlay_region_table (void); |
| #endif |
| |
| static void set_initial_language (void); |
| |
| static void load_command (char *, int); |
| |
| static void symbol_file_add_main_1 (char *args, int from_tty, int flags); |
| |
| static void add_symbol_file_command (char *, int); |
| |
| static void add_shared_symbol_files_command (char *, int); |
| |
| static void cashier_psymtab (struct partial_symtab *); |
| |
| bfd *symfile_bfd_open (char *); |
| |
| static void find_sym_fns (struct objfile *); |
| |
| static void decrement_reading_symtab (void *); |
| |
| static void overlay_invalidate_all (void); |
| |
| static int overlay_is_mapped (struct obj_section *); |
| |
| void list_overlays_command (char *, int); |
| |
| void map_overlay_command (char *, int); |
| |
| void unmap_overlay_command (char *, int); |
| |
| static void overlay_auto_command (char *, int); |
| |
| static void overlay_manual_command (char *, int); |
| |
| static void overlay_off_command (char *, int); |
| |
| static void overlay_load_command (char *, int); |
| |
| static void overlay_command (char *, int); |
| |
| static void simple_free_overlay_table (void); |
| |
| static void read_target_long_array (CORE_ADDR, unsigned int *, int); |
| |
| static int simple_read_overlay_table (void); |
| |
| static int simple_overlay_update_1 (struct obj_section *); |
| |
| static void add_filename_language (char *ext, enum language lang); |
| |
| static void set_ext_lang_command (char *args, int from_tty); |
| |
| static void info_ext_lang_command (char *args, int from_tty); |
| |
| static void init_filename_language_table (void); |
| |
| void _initialize_symfile (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, 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. */ |
| |
| int auto_solib_add = 1; |
| |
| /* For systems that support it, a threshold size in megabytes. If |
| automatically adding a new library's symbol table to those already |
| known to the debugger would cause the total shared library symbol |
| size to exceed this threshhold, then the shlib's symbols are not |
| added. The threshold is ignored if the user explicitly asks for a |
| shlib to be added, such as when using the "sharedlibrary" |
| command. */ |
| |
| int auto_solib_limit; |
| |
| |
| /* 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 (const void *s1p, const void *s2p) |
| { |
| register struct symbol **s1, **s2; |
| |
| s1 = (struct symbol **) s1p; |
| s2 = (struct symbol **) s2p; |
| return (strcmp (SYMBOL_SOURCE_NAME (*s1), SYMBOL_SOURCE_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 (const void *s1p, const void *s2p) |
| { |
| register struct partial_symbol **s1, **s2; |
| register char *st1, *st2; |
| |
| s1 = (struct partial_symbol **) s1p; |
| s2 = (struct partial_symbol **) s2p; |
| st1 = SYMBOL_SOURCE_NAME (*s1); |
| st2 = SYMBOL_SOURCE_NAME (*s2); |
| |
| |
| 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 |
| { |
| return (strcmp (st1, st2)); |
| } |
| } |
| |
| void |
| sort_pst_symbols (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 (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 (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 (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 (struct obstack *obstackp, const char *s1, const char *s2, |
| const char *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 (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 (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 (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 (void) |
| { |
| 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 (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; |
| } |
| |
| |
| /* Build (allocate and populate) a section_addr_info struct from |
| an existing section table. */ |
| |
| extern struct section_addr_info * |
| build_section_addr_info_from_section_table (const struct section_table *start, |
| const struct section_table *end) |
| { |
| struct section_addr_info *sap; |
| const struct section_table *stp; |
| int oidx; |
| |
| sap = xmalloc (sizeof (struct section_addr_info)); |
| memset (sap, 0, sizeof (struct section_addr_info)); |
| |
| for (stp = start, oidx = 0; stp != end; stp++) |
| { |
| if (bfd_get_section_flags (stp->bfd, |
| stp->the_bfd_section) & (SEC_ALLOC | SEC_LOAD) |
| && oidx < MAX_SECTIONS) |
| { |
| sap->other[oidx].addr = stp->addr; |
| sap->other[oidx].name |
| = xstrdup (bfd_section_name (stp->bfd, stp->the_bfd_section)); |
| sap->other[oidx].sectindex = stp->the_bfd_section->index; |
| oidx++; |
| } |
| } |
| |
| return sap; |
| } |
| |
| |
| /* Free all memory allocated by build_section_addr_info_from_section_table. */ |
| |
| extern void |
| free_section_addr_info (struct section_addr_info *sap) |
| { |
| int idx; |
| |
| for (idx = 0; idx < MAX_SECTIONS; idx++) |
| if (sap->other[idx].name) |
| xfree (sap->other[idx].name); |
| xfree (sap); |
| } |
| |
| |
| /* 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. */ |
| |
| void |
| default_symfile_offsets (struct objfile *objfile, |
| struct section_addr_info *addrs) |
| { |
| int i; |
| asection *sect = NULL; |
| |
| objfile->num_sections = SECT_OFF_MAX; |
| objfile->section_offsets = (struct section_offsets *) |
| obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS); |
| memset (objfile->section_offsets, 0, SIZEOF_SECTION_OFFSETS); |
| |
| /* Now calculate offsets for section that were specified by the |
| caller. */ |
| for (i = 0; i < MAX_SECTIONS && addrs->other[i].name; i++) |
| { |
| struct other_sections *osp ; |
| |
| osp = &addrs->other[i] ; |
| if (osp->addr == 0) |
| continue; |
| |
| /* Record all sections in offsets */ |
| /* The section_offsets in the objfile are here filled in using |
| the BFD index. */ |
| (objfile->section_offsets)->offsets[osp->sectindex] = osp->addr; |
| } |
| |
| /* Remember the bfd indexes for the .text, .data, .bss and |
| .rodata sections. */ |
| |
| sect = bfd_get_section_by_name (objfile->obfd, ".text"); |
| if (sect) |
| objfile->sect_index_text = sect->index; |
| |
| sect = bfd_get_section_by_name (objfile->obfd, ".data"); |
| if (sect) |
| objfile->sect_index_data = sect->index; |
| |
| sect = bfd_get_section_by_name (objfile->obfd, ".bss"); |
| if (sect) |
| objfile->sect_index_bss = sect->index; |
| |
| sect = bfd_get_section_by_name (objfile->obfd, ".rodata"); |
| if (sect) |
| objfile->sect_index_rodata = sect->index; |
| |
| } |
| |
| /* Process a symbol file, as either the main file or as a dynamically |
| loaded file. |
| |
| OBJFILE is where the symbols are to be read from. |
| |
| ADDR is the address where the text segment was loaded, unless the |
| objfile is the main symbol file, in which case it is zero. |
| |
| MAINLINE is nonzero if this is the main symbol file, or zero if |
| it's an extra symbol file such as dynamically loaded code. |
| |
| VERBO is nonzero if the caller has printed a verbose message about |
| the symbol reading (and complaints can be more terse about it). */ |
| |
| void |
| syms_from_objfile (struct objfile *objfile, struct section_addr_info *addrs, |
| int mainline, int verbo) |
| { |
| asection *lower_sect; |
| asection *sect; |
| CORE_ADDR lower_offset; |
| struct section_addr_info local_addr; |
| struct cleanup *old_chain; |
| int i; |
| |
| /* If ADDRS is NULL, initialize the local section_addr_info struct and |
| point ADDRS to it. We now establish the convention that an addr of |
| zero means no load address was specified. */ |
| |
| if (addrs == NULL) |
| { |
| memset (&local_addr, 0, sizeof (local_addr)); |
| addrs = &local_addr; |
| } |
| |
| 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_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 (clear_symtab_users_cleanup, 0 /*ignore*/); |
| |
| /* 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. |
| |
| We no longer warn if the lowest section is not a text segment (as |
| happens for the PA64 port. */ |
| if (!mainline) |
| { |
| /* Find lowest loadable section to be used as starting point for |
| continguous sections. FIXME!! won't work without call to find |
| .text first, but this assumes text is lowest section. */ |
| lower_sect = bfd_get_section_by_name (objfile->obfd, ".text"); |
| if (lower_sect == NULL) |
| bfd_map_over_sections (objfile->obfd, find_lowest_section, |
| (PTR) &lower_sect); |
| if (lower_sect == NULL) |
| warning ("no loadable sections found in added symbol-file %s", |
| objfile->name); |
| else |
| if ((bfd_get_section_flags (objfile->obfd, lower_sect) & SEC_CODE) == 0) |
| warning ("Lowest section in %s is %s at %s", |
| objfile->name, |
| bfd_section_name (objfile->obfd, lower_sect), |
| paddr (bfd_section_vma (objfile->obfd, lower_sect))); |
| if (lower_sect != NULL) |
| lower_offset = bfd_section_vma (objfile->obfd, lower_sect); |
| else |
| lower_offset = 0; |
| |
| /* Calculate offsets for the loadable sections. |
| FIXME! Sections must be in order of increasing loadable section |
| so that contiguous sections can use the lower-offset!!! |
| |
| Adjust offsets if the segments are not contiguous. |
| If the section is contiguous, its offset should be set to |
| the offset of the highest loadable section lower than it |
| (the loadable section directly below it in memory). |
| this_offset = lower_offset = lower_addr - lower_orig_addr */ |
| |
| /* Calculate offsets for sections. */ |
| for (i=0 ; i < MAX_SECTIONS && addrs->other[i].name; i++) |
| { |
| if (addrs->other[i].addr != 0) |
| { |
| sect = bfd_get_section_by_name (objfile->obfd, addrs->other[i].name); |
| if (sect) |
| { |
| addrs->other[i].addr -= bfd_section_vma (objfile->obfd, sect); |
| lower_offset = addrs->other[i].addr; |
| /* This is the index used by BFD. */ |
| addrs->other[i].sectindex = sect->index ; |
| } |
| else |
| { |
| warning ("section %s not found in %s", addrs->other[i].name, |
| objfile->name); |
| addrs->other[i].addr = 0; |
| } |
| } |
| else |
| addrs->other[i].addr = lower_offset; |
| } |
| } |
| |
| /* 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); |
| |
| (*objfile->sf->sym_offsets) (objfile, addrs); |
| |
| #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 algorithm for finding section offsets. |
| |
| These should probably all be collapsed into some target |
| independent form of shared library support. FIXME. */ |
| |
| if (addrs) |
| { |
| struct obj_section *s; |
| |
| /* Map section offsets in "addr" back to the object's |
| sections by comparing the section names with bfd's |
| section names. Then adjust the section address by |
| the offset. */ /* for gdb/13815 */ |
| |
| ALL_OBJFILE_OSECTIONS (objfile, s) |
| { |
| CORE_ADDR s_addr = 0; |
| int i; |
| |
| for (i = 0; |
| !s_addr && i < MAX_SECTIONS && addrs->other[i].name; |
| i++) |
| if (strcmp (bfd_section_name (s->objfile->obfd, |
| s->the_bfd_section), |
| addrs->other[i].name) == 0) |
| s_addr = addrs->other[i].addr; /* end added for gdb/13815 */ |
| |
| s->addr -= s->offset; |
| s->addr += s_addr; |
| s->endaddr -= s->offset; |
| s->endaddr += s_addr; |
| s->offset += s_addr; |
| } |
| } |
| #endif /* not IBM6000_TARGET */ |
| |
| (*objfile->sf->sym_read) (objfile, 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 |
| dependent 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 (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. |
| |
| 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 (char *name, int from_tty, struct section_addr_info *addrs, |
| int mainline, int flags) |
| { |
| 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 ((have_full_symbols () || have_partial_symbols ()) |
| && mainline |
| && from_tty |
| && !query ("Load new symbol table from \"%s\"? ", name)) |
| error ("Not confirmed."); |
| |
| objfile = allocate_objfile (abfd, flags); |
| |
| /* 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, addrs, 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 ((flags & OBJF_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); |
| |
| if (target_new_objfile_hook) |
| target_new_objfile_hook (objfile); |
| |
| return (objfile); |
| } |
| |
| /* Call symbol_file_add() with default values and update whatever is |
| affected by the loading of a new main(). |
| Used when the file is supplied in the gdb command line |
| and by some targets with special loading requirements. |
| The auxiliary function, symbol_file_add_main_1(), has the flags |
| argument for the switches that can only be specified in the symbol_file |
| command itself. */ |
| |
| void |
| symbol_file_add_main (char *args, int from_tty) |
| { |
| symbol_file_add_main_1 (args, from_tty, 0); |
| } |
| |
| static void |
| symbol_file_add_main_1 (char *args, int from_tty, int flags) |
| { |
| symbol_file_add (args, from_tty, NULL, 1, flags); |
| |
| #ifdef HPUXHPPA |
| RESET_HP_UX_GLOBALS (); |
| #endif |
| |
| /* Getting new symbols may change our opinion about |
| what is frameless. */ |
| reinit_frame_cache (); |
| |
| set_initial_language (); |
| } |
| |
| void |
| symbol_file_clear (int from_tty) |
| { |
| 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 |
| } |
| |
| /* 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). */ |
| /* Note: ezannoni 2000-04-17. This function used to have support for |
| rombug (see remote-os9k.c). It consisted of a call to target_link() |
| (target.c) to get the address of the text segment from the target, |
| and pass that to symbol_file_add(). This is no longer supported. */ |
| |
| void |
| symbol_file_command (char *args, int from_tty) |
| { |
| char **argv; |
| char *name = NULL; |
| struct cleanup *cleanups; |
| int flags = OBJF_USERLOADED; |
| |
| dont_repeat (); |
| |
| if (args == NULL) |
| { |
| symbol_file_clear (from_tty); |
| } |
| else |
| { |
| if ((argv = buildargv (args)) == NULL) |
| { |
| nomem (0); |
| } |
| cleanups = make_cleanup_freeargv (argv); |
| while (*argv != NULL) |
| { |
| if (STREQ (*argv, "-mapped")) |
| flags |= OBJF_MAPPED; |
| else |
| if (STREQ (*argv, "-readnow")) |
| flags |= OBJF_READNOW; |
| else |
| if (**argv == '-') |
| error ("unknown option `%s'", *argv); |
| else |
| { |
| name = *argv; |
| |
| symbol_file_add_main_1 (name, from_tty, flags); |
| } |
| argv++; |
| } |
| |
| if (name == NULL) |
| { |
| error ("no symbol file name was specified"); |
| } |
| 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 (void) |
| { |
| 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 (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) || defined (__CYGWIN__) |
| 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 (xfree, name); |
| perror_with_name (name); |
| } |
| xfree (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 (xfree, name); |
| error ("\"%s\": can't open to read symbols: %s.", name, |
| bfd_errmsg (bfd_get_error ())); |
| } |
| sym_bfd->cacheable = 1; |
| |
| 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 (xfree, name); |
| error ("\"%s\": can't read symbols: %s.", name, |
| bfd_errmsg (bfd_get_error ())); |
| } |
| 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 (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 (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 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 (char *arg, int from_tty) |
| { |
| if (arg == NULL) |
| arg = get_exec_file (1); |
| target_load (arg, from_tty); |
| |
| /* After re-loading the executable, we don't really know which |
| overlays are mapped any more. */ |
| overlay_cache_invalid = 1; |
| } |
| |
| /* 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. */ |
| |
| static int download_write_size = 512; |
| static int validate_download = 0; |
| |
| /* Callback service function for generic_load (bfd_map_over_sections). */ |
| |
| static void |
| add_section_size_callback (bfd *abfd, asection *asec, void *data) |
| { |
| bfd_size_type *sum = data; |
| |
| *sum += bfd_get_section_size_before_reloc (asec); |
| } |
| |
| /* Opaque data for load_section_callback. */ |
| struct load_section_data { |
| unsigned long load_offset; |
| unsigned long write_count; |
| unsigned long data_count; |
| bfd_size_type total_size; |
| }; |
| |
| /* Callback service function for generic_load (bfd_map_over_sections). */ |
| |
| static void |
| load_section_callback (bfd *abfd, asection *asec, void *data) |
| { |
| struct load_section_data *args = data; |
| |
| if (bfd_get_section_flags (abfd, asec) & SEC_LOAD) |
| { |
| bfd_size_type size = bfd_get_section_size_before_reloc (asec); |
| if (size > 0) |
| { |
| char *buffer; |
| struct cleanup *old_chain; |
| CORE_ADDR lma = bfd_section_lma (abfd, asec) + args->load_offset; |
| bfd_size_type block_size; |
| int err; |
| const char *sect_name = bfd_get_section_name (abfd, asec); |
| bfd_size_type sent; |
| |
| if (download_write_size > 0 && size > download_write_size) |
| block_size = download_write_size; |
| else |
| block_size = size; |
| |
| buffer = xmalloc (size); |
| old_chain = make_cleanup (xfree, buffer); |
| |
| /* Is this really necessary? I guess it gives the user something |
| to look at during a long download. */ |
| ui_out_message (uiout, 0, "Loading section %s, size 0x%s lma 0x%s\n", |
| sect_name, paddr_nz (size), paddr_nz (lma)); |
| |
| bfd_get_section_contents (abfd, asec, buffer, 0, size); |
| |
| sent = 0; |
| do |
| { |
| int len; |
| bfd_size_type this_transfer = size - sent; |
| |
| if (this_transfer >= block_size) |
| this_transfer = block_size; |
| len = target_write_memory_partial (lma, buffer, |
| this_transfer, &err); |
| if (err) |
| break; |
| if (validate_download) |
| { |
| /* Broken memories and broken monitors manifest |
| themselves here when bring new computers to |
| life. This doubles already slow downloads. */ |
| /* NOTE: cagney/1999-10-18: A more efficient |
| implementation might add a verify_memory() |
| method to the target vector and then use |
| that. remote.c could implement that method |
| using the ``qCRC'' packet. */ |
| char *check = xmalloc (len); |
| struct cleanup *verify_cleanups = |
| make_cleanup (xfree, check); |
| |
| if (target_read_memory (lma, check, len) != 0) |
| error ("Download verify read failed at 0x%s", |
| paddr (lma)); |
| if (memcmp (buffer, check, len) != 0) |
| error ("Download verify compare failed at 0x%s", |
| paddr (lma)); |
| do_cleanups (verify_cleanups); |
| } |
| args->data_count += len; |
| lma += len; |
| buffer += len; |
| args->write_count += 1; |
| sent += len; |
| if (quit_flag |
| || (ui_load_progress_hook != NULL |
| && ui_load_progress_hook (sect_name, sent))) |
| error ("Canceled the download"); |
| |
| if (show_load_progress != NULL) |
| show_load_progress (sect_name, sent, size, |
| args->data_count, args->total_size); |
| } |
| while (sent < size); |
| |
| if (err != 0) |
| error ("Memory access error while loading section %s.", sect_name); |
| |
| do_cleanups (old_chain); |
| } |
| } |
| } |
| |
| void |
| generic_load (char *args, int from_tty) |
| { |
| asection *s; |
| bfd *loadfile_bfd; |
| time_t start_time, end_time; /* Start and end times of download */ |
| char *filename; |
| struct cleanup *old_cleanups; |
| char *offptr; |
| struct load_section_data cbdata; |
| CORE_ADDR entry; |
| |
| cbdata.load_offset = 0; /* Offset to add to vma for each section. */ |
| cbdata.write_count = 0; /* Number of writes needed. */ |
| cbdata.data_count = 0; /* Number of bytes written to target memory. */ |
| cbdata.total_size = 0; /* Total size of all bfd sectors. */ |
| |
| /* Parse the input argument - the user can specify a load offset as |
| a second argument. */ |
| filename = xmalloc (strlen (args) + 1); |
| old_cleanups = make_cleanup (xfree, filename); |
| strcpy (filename, args); |
| offptr = strchr (filename, ' '); |
| if (offptr != NULL) |
| { |
| char *endptr; |
| |
| cbdata.load_offset = strtoul (offptr, &endptr, 0); |
| if (offptr == endptr) |
| error ("Invalid download offset:%s\n", offptr); |
| *offptr = '\0'; |
| } |
| else |
| cbdata.load_offset = 0; |
| |
| /* Open the file for loading. */ |
| 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). */ |
| make_cleanup_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 ())); |
| } |
| |
| bfd_map_over_sections (loadfile_bfd, add_section_size_callback, |
| (void *) &cbdata.total_size); |
| |
| start_time = time (NULL); |
| |
| bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata); |
| |
| end_time = time (NULL); |
| |
| entry = bfd_get_start_address (loadfile_bfd); |
| ui_out_text (uiout, "Start address "); |
| ui_out_field_fmt (uiout, "address", "0x%s", paddr_nz (entry)); |
| ui_out_text (uiout, ", load size "); |
| ui_out_field_fmt (uiout, "load-size", "%lu", cbdata.data_count); |
| ui_out_text (uiout, "\n"); |
| /* 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. */ |
| |
| print_transfer_performance (gdb_stdout, cbdata.data_count, |
| cbdata.write_count, end_time - start_time); |
| |
| do_cleanups (old_cleanups); |
| } |
| |
| /* Report how fast the transfer went. */ |
| |
| /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being |
| replaced by print_transfer_performance (with a very different |
| function signature). */ |
| |
| void |
| report_transfer_performance (unsigned long data_count, time_t start_time, |
| time_t end_time) |
| { |
| print_transfer_performance (gdb_stdout, data_count, |
| end_time - start_time, 0); |
| } |
| |
| void |
| print_transfer_performance (struct ui_file *stream, |
| unsigned long data_count, |
| unsigned long write_count, |
| unsigned long time_count) |
| { |
| ui_out_text (uiout, "Transfer rate: "); |
| if (time_count > 0) |
| { |
| ui_out_field_fmt (uiout, "transfer-rate", "%lu", |
| (data_count * 8) / time_count); |
| ui_out_text (uiout, " bits/sec"); |
| } |
| else |
| { |
| ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8)); |
| ui_out_text (uiout, " bits in <1 sec"); |
| } |
| if (write_count > 0) |
| { |
| ui_out_text (uiout, ", "); |
| ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count); |
| ui_out_text (uiout, " bytes/write"); |
| } |
| ui_out_text (uiout, ".\n"); |
| } |
| |
| /* This function allows the addition of incrementally linked object files. |
| It does not modify any state in the target, only in the debugger. */ |
| /* Note: ezannoni 2000-04-13 This function/command used to have a |
| special case syntax for the rombug target (Rombug is the boot |
| monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the |
| rombug case, the user doesn't need to supply a text address, |
| instead a call to target_link() (in target.c) would supply the |
| value to use. We are now discontinuing this type of ad hoc syntax. */ |
| |
| /* ARGSUSED */ |
| static void |
| add_symbol_file_command (char *args, int from_tty) |
| { |
| char *filename = NULL; |
| int flags = OBJF_USERLOADED; |
| char *arg; |
| int expecting_option = 0; |
| int section_index = 0; |
| int argcnt = 0; |
| int sec_num = 0; |
| int i; |
| int expecting_sec_name = 0; |
| int expecting_sec_addr = 0; |
| |
| struct |
| { |
| char *name; |
| char *value; |
| } sect_opts[SECT_OFF_MAX]; |
| |
| struct section_addr_info section_addrs; |
| struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL); |
| |
| 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 = xstrdup (args); |
| |
| /* Ensure section_addrs is initialized */ |
| memset (§ion_addrs, 0, sizeof (section_addrs)); |
| |
| while (*args != '\000') |
| { |
| /* Any leading spaces? */ |
| while (isspace (*args)) |
| args++; |
| |
| /* Point arg to the beginning of the argument. */ |
| arg = args; |
| |
| /* Move args pointer over the argument. */ |
| while ((*args != '\000') && !isspace (*args)) |
| args++; |
| |
| /* If there are more arguments, terminate arg and |
| proceed past it. */ |
| if (*args != '\000') |
| *args++ = '\000'; |
| |
| /* Now process the argument. */ |
| if (argcnt == 0) |
| { |
| /* The first argument is the file name. */ |
| filename = tilde_expand (arg); |
| make_cleanup (xfree, filename); |
| } |
| else |
| if (argcnt == 1) |
| { |
| /* The second argument is always the text address at which |
| to load the program. */ |
| sect_opts[section_index].name = ".text"; |
| sect_opts[section_index].value = arg; |
| section_index++; |
| } |
| else |
| { |
| /* It's an option (starting with '-') or it's an argument |
| to an option */ |
| |
| if (*arg == '-') |
| { |
| if (strcmp (arg, "-mapped") == 0) |
| flags |= OBJF_MAPPED; |
| else |
| if (strcmp (arg, "-readnow") == 0) |
| flags |= OBJF_READNOW; |
| else |
| if (strcmp (arg, "-s") == 0) |
| { |
| if (section_index >= SECT_OFF_MAX) |
| error ("Too many sections specified."); |
| expecting_sec_name = 1; |
| expecting_sec_addr = 1; |
| } |
| } |
| else |
| { |
| if (expecting_sec_name) |
| { |
| sect_opts[section_index].name = arg; |
| expecting_sec_name = 0; |
| } |
| else |
| if (expecting_sec_addr) |
| { |
| sect_opts[section_index].value = arg; |
| expecting_sec_addr = 0; |
| section_index++; |
| } |
| else |
| error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*"); |
| } |
| } |
| argcnt++; |
| } |
| |
| /* Print the prompt for the query below. And save the arguments into |
| a sect_addr_info structure to be passed around to other |
| functions. We have to split this up into separate print |
| statements because local_hex_string returns a local static |
| string. */ |
| |
| printf_filtered ("add symbol table from file \"%s\" at\n", filename); |
| for (i = 0; i < section_index; i++) |
| { |
| CORE_ADDR addr; |
| char *val = sect_opts[i].value; |
| char *sec = sect_opts[i].name; |
| |
| val = sect_opts[i].value; |
| if (val[0] == '0' && val[1] == 'x') |
| addr = strtoul (val+2, NULL, 16); |
| else |
| addr = strtoul (val, NULL, 10); |
| |
| /* Here we store the section offsets in the order they were |
| entered on the command line. */ |
| section_addrs.other[sec_num].name = sec; |
| section_addrs.other[sec_num].addr = addr; |
| printf_filtered ("\t%s_addr = %s\n", |
| sec, |
| local_hex_string ((unsigned long)addr)); |
| sec_num++; |
| |
| /* The object's sections are initialized when a |
| call is made to build_objfile_section_table (objfile). |
| This happens in reread_symbols. |
| At this point, we don't know what file type this is, |
| so we can't determine what section names are valid. */ |
| } |
| |
| if (from_tty && (!query ("%s", ""))) |
| error ("Not confirmed."); |
| |
| symbol_file_add (filename, from_tty, §ion_addrs, 0, flags); |
| |
| /* Getting new symbols may change our opinion about what is |
| frameless. */ |
| reinit_frame_cache (); |
| do_cleanups (my_cleanups); |
| } |
| |
| static void |
| add_shared_symbol_files_command (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 (void) |
| { |
| 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; |
| 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_free_objfile (objfile); |
| /* We need to do this whenever any symbols go away. */ |
| make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/); |
| |
| /* 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; |
| offsets = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS); |
| memcpy (offsets, objfile->section_offsets, SIZEOF_SECTION_OFFSETS); |
| |
| /* 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) |
| xmfree (objfile->md, objfile->global_psymbols.list); |
| memset (&objfile->global_psymbols, 0, |
| sizeof (objfile->global_psymbols)); |
| if (objfile->static_psymbols.list) |
| xmfree (objfile->md, objfile->static_psymbols.list); |
| memset (&objfile->static_psymbols, 0, |
| sizeof (objfile->static_psymbols)); |
| |
| /* Free the obstacks for non-reusable objfiles */ |
| free_bcache (&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; |
| memset (&objfile->msymbol_hash, 0, |
| sizeof (objfile->msymbol_hash)); |
| memset (&objfile->msymbol_demangled_hash, 0, |
| sizeof (objfile->msymbol_demangled_hash)); |
| 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, xfree); |
| obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0, |
| xmalloc, xfree); |
| obstack_specify_allocation (&objfile->symbol_obstack, 0, 0, |
| xmalloc, xfree); |
| obstack_specify_allocation (&objfile->type_obstack, 0, 0, |
| xmalloc, xfree); |
| 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, SIZEOF_SECTION_OFFSETS); |
| memcpy (objfile->section_offsets, offsets, SIZEOF_SECTION_OFFSETS); |
| 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, 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 |
| dependent 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 (char *ext, enum language lang) |
| { |
| if (fl_table_next >= fl_table_size) |
| { |
| fl_table_size += 10; |
| filename_language_table = xrealloc (filename_language_table, |
| fl_table_size); |
| } |
| |
| filename_language_table[fl_table_next].ext = xstrdup (ext); |
| filename_language_table[fl_table_next].lang = lang; |
| fl_table_next++; |
| } |
| |
| static char *ext_args; |
| |
| static void |
| set_ext_lang_command (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)); */ |
| |
| xfree (filename_language_table[i].ext); |
| filename_language_table[i].ext = xstrdup (ext_args); |
| filename_language_table[i].lang = lang; |
| } |
| } |
| |
| static void |
| info_ext_lang_command (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 (void) |
| { |
| 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); |
| add_filename_language (".java", language_java); |
| add_filename_language (".class", language_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); |
| add_filename_language (".pas", language_pascal); |
| add_filename_language (".p", language_pascal); |
| add_filename_language (".pp", language_pascal); |
| } |
| } |
| |
| enum language |
| deduce_language_from_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 (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 (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 (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 (void) |
| { |
| /* 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 (); |
| if (target_new_objfile_hook) |
| target_new_objfile_hook (NULL); |
| } |
| |
| static void |
| clear_symtab_users_cleanup (void *ignore) |
| { |
| clear_symtab_users (); |
| } |
| |
| /* 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 (void); |
| |
| static int clear_symtab_users_queued; |
| static int clear_symtab_users_done; |
| |
| static void |
| clear_symtab_users_once (void) |
| { |
| /* 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 (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 value 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 (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. |
| |
| FILENAME is the name of the symbol-file we are reading from. */ |
| |
| struct partial_symtab * |
| start_psymtab_common (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 (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 (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 (struct objfile *objfile, int total_symbols) |
| { |
| /* Free any previously allocated psymbol lists. */ |
| |
| if (objfile->global_psymbols.list) |
| { |
| xmfree (objfile->md, (PTR) objfile->global_psymbols.list); |
| } |
| if (objfile->static_psymbols.list) |
| { |
| xmfree (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 |
| sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap |
| 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: */ |
| |
| enum overlay_debugging_state overlay_debugging = ovly_off; |
| int overlay_cache_invalid = 0; /* True if need to refresh mapped state */ |
| |
| /* Target vector for refreshing overlay mapped state */ |
| static void simple_overlay_update (struct obj_section *); |
| void (*target_overlay_update) (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 (asection *section) |
| { |
| /* FIXME: need bfd *, so we can use bfd_section_lma methods. */ |
| |
| 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 (void) |
| { |
| 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 (struct obj_section *osect) |
| { |
| if (osect == 0 || !section_is_overlay (osect->the_bfd_section)) |
| return 0; |
| |
| switch (overlay_debugging) |
| { |
| default: |
| case ovly_off: |
| return 0; /* overlay debugging off */ |
| case ovly_auto: /* 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 ovly_on: /* 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 (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 (CORE_ADDR pc, asection *section) |
| { |
| /* FIXME: need bfd *, so we can use bfd_section_lma methods. */ |
| |
| 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 (CORE_ADDR pc, asection *section) |
| { |
| /* FIXME: need bfd *, so we can use bfd_section_vma methods. */ |
| |
| 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; |
| } |
| |
| |
| /* Return true if the mapped ranges of sections A and B overlap, false |
| otherwise. */ |
| int |
| sections_overlap (asection *a, asection *b) |
| { |
| /* FIXME: need bfd *, so we can use bfd_section_vma methods. */ |
| |
| CORE_ADDR a_start = a->vma; |
| CORE_ADDR a_end = a->vma + bfd_get_section_size_before_reloc (a); |
| CORE_ADDR b_start = b->vma; |
| CORE_ADDR b_end = b->vma + bfd_get_section_size_before_reloc (b); |
| |
| return (a_start < b_end && b_start < a_end); |
| } |
| |
| /* 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 (CORE_ADDR pc, asection *section) |
| { |
| /* FIXME: need bfd *, so we can use bfd_section_lma methods. */ |
| |
| 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 (CORE_ADDR pc, asection *section) |
| { |
| /* FIXME: need bfd *, so we can use bfd_section_vma methods. */ |
| |
| 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 (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 (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 (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 (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, gdb_stdout); |
| puts_filtered (" - "); |
| print_address_numeric (lma + size, 1, gdb_stdout); |
| printf_filtered (", mapped at "); |
| print_address_numeric (vma, 1, gdb_stdout); |
| puts_filtered (" - "); |
| print_address_numeric (vma + size, 1, gdb_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 (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 either the 'overlay auto' or\n\ |
| the 'overlay manual' 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 |
| && sections_overlap (sec->the_bfd_section, |
| sec2->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 (char *args, int from_tty) |
| { |
| struct objfile *objfile; |
| struct obj_section *sec; |
| |
| if (!overlay_debugging) |
| error ("\ |
| Overlay debugging not enabled. Use either the 'overlay auto' or\n\ |
| the 'overlay manual' 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 (char *args, int from_tty) |
| { |
| overlay_debugging = ovly_auto; |
| enable_overlay_breakpoints (); |
| 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 (char *args, int from_tty) |
| { |
| overlay_debugging = ovly_on; |
| disable_overlay_breakpoints (); |
| 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 (char *args, int from_tty) |
| { |
| overlay_debugging = ovly_off; |
| disable_overlay_breakpoints (); |
| if (info_verbose) |
| printf_filtered ("Overlay debugging disabled."); |
| } |
| |
| static void |
| overlay_load_command (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 (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 (void) |
| { |
| if (cache_ovly_table) |
| xfree (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 (void) |
| { |
| if (cache_ovly_region_table) |
| xfree (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 (CORE_ADDR memaddr, unsigned int *myaddr, int len) |
| { |
| /* FIXME (alloca): Not safe if array is very large. */ |
| 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 (void) |
| { |
| struct minimal_symbol *novlys_msym, *ovly_table_msym; |
| |
| simple_free_overlay_table (); |
| novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL); |
| if (! novlys_msym) |
| { |
| error ("Error reading inferior's overlay table: " |
| "couldn't find `_novlys' variable\n" |
| "in inferior. Use `overlay manual' mode."); |
| return 0; |
| } |
| |
| ovly_table_msym = lookup_minimal_symbol ("_ovly_table", NULL, NULL); |
| if (! ovly_table_msym) |
| { |
| error ("Error reading inferior's overlay table: couldn't find " |
| "`_ovly_table' array\n" |
| "in inferior. Use `overlay manual' mode."); |
| return 0; |
| } |
| |
| cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym), 4); |
| cache_ovly_table |
| = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table)); |
| cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym); |
| read_target_long_array (cache_ovly_table_base, |
| (int *) cache_ovly_table, |
| cache_novlys * 4); |
| |
| 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 (void) |
| { |
| struct minimal_symbol *msym; |
| |
| simple_free_overlay_region_table (); |
| msym = lookup_minimal_symbol ("_novly_regions", NULL, NULL); |
| 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", NULL, NULL); |
| 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 (struct obj_section *osect) |
| { |
| int i, size; |
| bfd *obfd = osect->objfile->obfd; |
| asection *bsect = osect->the_bfd_section; |
| |
| size = bfd_get_section_size_before_reloc (osect->the_bfd_section); |
| for (i = 0; i < cache_novlys; i++) |
| if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) |
| && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) |
| /* && 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] == bfd_section_vma (obfd, bsect) |
| && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) |
| /* && 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 (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", NULL, NULL))) |
| /* 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 ()) |
| 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; |
| bfd *obfd = osect->objfile->obfd; |
| asection *bsect = osect->the_bfd_section; |
| |
| size = bfd_get_section_size_before_reloc (osect->the_bfd_section); |
| for (i = 0; i < cache_novlys; i++) |
| if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect) |
| && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect) |
| /* && 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 (void) |
| { |
| 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 [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\ |
| Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\ |
| ADDR is the starting address of the file's text.\n\ |
| The optional arguments are section-name section-address pairs and\n\ |
| should be specified if the data and bss segments are not contiguous\n\ |
| with the text. SECT is a section name to be loaded at SECT_ADDR.", |
| &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); |
| set_cmd_cfunc (c, set_ext_lang_command); |
| |
| add_info ("extensions", info_ext_lang_command, |
| "All filename extensions associated with a source language."); |
| |
| add_show_from_set |
| (add_set_cmd ("download-write-size", class_obscure, |
| var_integer, (char *) &download_write_size, |
| "Set the write size used when downloading a program.\n" |
| "Only used when downloading a program onto a remote\n" |
| "target. Specify zero, or a negative value, to disable\n" |
| "blocked writes. The actual size of each transfer is also\n" |
| "limited by the size of the target packet and the memory\n" |
| "cache.\n", |
| &setlist), |
| &showlist); |
| } |