/* Generic symbol file reading for the GNU debugger, GDB.
- Copyright 1990, 1991 Free Software Foundation, Inc.
+ Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998
+ Free Software Foundation, Inc.
Contributed by Cygnus Support, using pieces from other GDB modules.
-This file is part of GDB.
+ This file is part of GDB.
-GDB 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 1, or (at your option)
-any later version.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
-GDB is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-You should have received a copy of the GNU General Public License
-along with GDB; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
-#include <stdio.h>
#include "defs.h"
#include "symtab.h"
-#include "param.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 <obstack.h>
#include <assert.h>
-
#include <sys/types.h>
#include <fcntl.h>
-#include <string.h>
-#include <sys/stat.h>
+#include "gdb_string.h"
+#include "gdb_stat.h"
+#include <ctype.h>
+#include <time.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
+#ifdef HPUXHPPA
+
+/* Some HP-UX related globals to clear when a new "main"
+ symbol file is loaded. HP-specific. */
+
+extern int hp_som_som_object_present;
+extern int hp_cxx_exception_support_initialized;
+#define RESET_HP_UX_GLOBALS() do {\
+ hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
+ hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
+ } while (0)
+#endif
+
+int (*ui_load_progress_hook) PARAMS ((char *, unsigned long));
+void (*pre_add_symbol_hook) PARAMS ((char *));
+void (*post_add_symbol_hook) PARAMS ((void));
+
+/* Global variables owned by this file */
+int readnow_symbol_files; /* Read full symbols immediately */
+
+struct complaint oldsyms_complaint =
+{
+ "Replacing old symbols for `%s'", 0, 0
+};
+
+struct complaint empty_symtab_complaint =
+{
+ "Empty symbol table found for `%s'", 0, 0
+};
+
+/* External variables and functions referenced. */
extern int info_verbose;
-extern int close ();
-extern void qsort ();
-extern char *getenv ();
+extern void report_transfer_performance PARAMS ((unsigned long,
+ time_t, time_t));
/* Functions this file defines */
-static bfd *symfile_open();
-static struct sym_fns *symfile_init();
-static void clear_symtab_users_once();
-/* List of all available sym_fns. */
+#if 0
+static int simple_read_overlay_region_table PARAMS ((void));
+static void simple_free_overlay_region_table PARAMS ((void));
+#endif
+
+static void set_initial_language PARAMS ((void));
-struct sym_fns *symtab_fns = NULL;
+static void load_command PARAMS ((char *, int));
-/* Saves the sym_fns of the current symbol table, so we can call
- the right sym_discard function when we free it. */
+static void add_symbol_file_command PARAMS ((char *, int));
-static struct sym_fns *symfile_fns;
+static void add_shared_symbol_files_command PARAMS ((char *, int));
-/* Allocate an obstack to hold objects that should be freed
- when we load a new symbol table.
- This includes the symbols made by dbxread
- and the types that are not permanent. */
+static void cashier_psymtab PARAMS ((struct partial_symtab *));
-struct obstack obstack1;
+static int compare_psymbols PARAMS ((const void *, const void *));
-struct obstack *symbol_obstack = &obstack1;
+static int compare_symbols PARAMS ((const void *, const void *));
-/* This obstack will be used for partial_symbol objects. It can
- probably actually be the same as the symbol_obstack above, but I'd
- like to keep them seperate for now. If I want to later, I'll
- replace one with the other. */
+bfd *symfile_bfd_open PARAMS ((char *));
-struct obstack obstack2;
+static void find_sym_fns PARAMS ((struct objfile *));
-struct obstack *psymbol_obstack = &obstack2;
+static void decrement_reading_symtab PARAMS ((void *));
-/* File name symbols were loaded from. */
+static void overlay_invalidate_all PARAMS ((void));
-char *symfile = 0;
+static int overlay_is_mapped PARAMS ((struct obj_section *));
-/* The modification date of the file when they were loaded. */
+void list_overlays_command PARAMS ((char *, int));
-int symfile_mtime = 0;
+void map_overlay_command PARAMS ((char *, int));
-/* Structures with which to manage partial symbol allocation. */
+void unmap_overlay_command PARAMS ((char *, int));
-struct psymbol_allocation_list global_psymbols = {0}, static_psymbols = {0};
+static void overlay_auto_command PARAMS ((char *, int));
-/* Structure to manage complaints about symbol file contents. */
+static void overlay_manual_command PARAMS ((char *, int));
-struct complaint complaint_root[1] = {
- {(char *)0, 0, complaint_root},
-};
+static void overlay_off_command PARAMS ((char *, int));
+
+static void overlay_load_command PARAMS ((char *, int));
+
+static void overlay_command PARAMS ((char *, int));
+
+static void simple_free_overlay_table PARAMS ((void));
+
+static void read_target_long_array PARAMS ((CORE_ADDR, unsigned int *, int));
+
+static int simple_read_overlay_table PARAMS ((void));
+
+static int simple_overlay_update_1 PARAMS ((struct obj_section *));
+
+static void add_filename_language PARAMS ((char *ext, enum language lang));
+
+static void set_ext_lang_command PARAMS ((char *args, int from_tty));
+
+static void info_ext_lang_command PARAMS ((char *args, int from_tty));
+
+static void init_filename_language_table PARAMS ((void));
+
+void _initialize_symfile PARAMS ((void));
+
+/* List of all available sym_fns. On gdb startup, each object file reader
+ calls add_symtab_fns() to register information on each format it is
+ prepared to read. */
-/* Some actual complaints. */
+static struct sym_fns *symtab_fns = NULL;
-struct complaint oldsyms_complaint = {
- "Replacing old symbols for `%s'", 0, 0 };
+/* Flag for whether user will be reloading symbols multiple times.
+ Defaults to ON for VxWorks, otherwise OFF. */
-struct complaint empty_symtab_complaint = {
- "Empty symbol table found for `%s'", 0, 0 };
+#ifdef SYMBOL_RELOADING_DEFAULT
+int symbol_reloading = SYMBOL_RELOADING_DEFAULT;
+#else
+int symbol_reloading = 0;
+#endif
+/* If non-zero, then on HP-UX (i.e., platforms that use somsolib.c),
+ this variable is interpreted as a threshhold. If adding a new
+ library's symbol table to those already known to the debugger would
+ exceed this threshhold, then the shlib's symbols are not added.
+
+ If non-zero on other platforms, shared library symbols will be added
+ automatically when the inferior is created, new libraries are loaded,
+ or when attaching to the inferior. This is almost always what users
+ will want to have happen; but for very large programs, the startup
+ time will be excessive, and so if this is a problem, the user can
+ clear this flag and then add the shared library symbols as needed.
+ Note that there is a potential for confusion, since if the shared
+ library symbols are not loaded, commands like "info fun" will *not*
+ report all the functions that are actually present.
+
+ Note that HP-UX interprets this variable to mean, "threshhold size
+ in megabytes, where zero means never add". Other platforms interpret
+ this variable to mean, "always add if non-zero, never add if zero."
+ */
+
+int auto_solib_add = 1;
\f
-/* In the following sort, we always make sure that
- register debug symbol declarations always come before regular
- debug symbol declarations (as might happen when parameters are
- then put into registers by the compiler). */
+
+/* Since this function is called from within qsort, in an ANSI environment
+ it must conform to the prototype for qsort, which specifies that the
+ comparison function takes two "void *" pointers. */
+
+static int
+compare_symbols (s1p, s2p)
+ const PTR s1p;
+ const PTR s2p;
+{
+ register struct symbol **s1, **s2;
+
+ s1 = (struct symbol **) s1p;
+ s2 = (struct symbol **) s2p;
+
+ return (STRCMP (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2)));
+}
+
+/*
+
+ LOCAL FUNCTION
+
+ compare_psymbols -- compare two partial symbols by name
+
+ DESCRIPTION
+
+ Given pointers to pointers to two partial symbol table entries,
+ compare them by name and return -N, 0, or +N (ala strcmp).
+ Typically used by sorting routines like qsort().
+
+ NOTES
+
+ Does direct compare of first two characters before punting
+ and passing to strcmp for longer compares. Note that the
+ original version had a bug whereby two null strings or two
+ identically named one character strings would return the
+ comparison of memory following the null byte.
+
+ */
static int
-compare_symbols (s1, s2)
- struct symbol **s1, **s2;
+compare_psymbols (s1p, s2p)
+ const PTR s1p;
+ const PTR s2p;
{
- register int namediff;
+ register char *st1 = SYMBOL_NAME (*(struct partial_symbol **) s1p);
+ register char *st2 = SYMBOL_NAME (*(struct partial_symbol **) s2p);
- /* Compare the initial characters. */
- namediff = SYMBOL_NAME (*s1)[0] - SYMBOL_NAME (*s2)[0];
- if (namediff != 0) return namediff;
+ if ((st1[0] - st2[0]) || !st1[0])
+ {
+ return (st1[0] - st2[0]);
+ }
+ else if ((st1[1] - st2[1]) || !st1[1])
+ {
+ return (st1[1] - st2[1]);
+ }
+ else
+ {
+ /* Note: I replaced the STRCMP line (commented out below)
+ * with a simpler "strcmp()" which compares the 2 strings
+ * from the beginning. (STRCMP is a macro which first compares
+ * the initial characters, then falls back on strcmp).
+ * The reason is that the STRCMP line was tickling a C compiler
+ * bug on HP-UX 10.30, which is avoided with the simpler
+ * code. The performance gain from the more complicated code
+ * is negligible, given that we have already checked the
+ * initial 2 characters above. I reported the compiler bug,
+ * and once it is fixed the original line can be put back. RT
+ */
+ /* return ( STRCMP (st1 + 2, st2 + 2)); */
+ return (strcmp (st1, st2));
+ }
+}
- /* If they match, compare the rest of the names. */
- namediff = strcmp (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2));
- if (namediff != 0) return namediff;
+void
+sort_pst_symbols (pst)
+ struct partial_symtab *pst;
+{
+ /* Sort the global list; don't sort the static list */
- /* For symbols of the same name, registers should come first. */
- return ((SYMBOL_CLASS (*s2) == LOC_REGISTER)
- - (SYMBOL_CLASS (*s1) == LOC_REGISTER));
+ 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. */
sort_symtab_syms (s)
register struct symtab *s;
{
- register struct blockvector *bv = BLOCKVECTOR (s);
- int nbl = BLOCKVECTOR_NBLOCKS (bv);
+ 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);
}
}
-void
-sort_all_symtab_syms ()
-{
- register struct symtab *s;
-
- for (s = symtab_list; s; s = s->next)
- {
- sort_symtab_syms (s);
- }
-}
-
-/* Make a copy of the string at PTR with SIZE characters in the symbol obstack
- (and add a null character at the end in the copy).
- Returns the address of the copy. */
+/* Make a null terminated copy of the string at PTR with SIZE characters in
+ the obstack pointed to by OBSTACKP . Returns the address of the copy.
+ Note that the string at PTR does not have to be null terminated, I.E. it
+ may be part of a larger string and we are only saving a substring. */
char *
-obsavestring (ptr, size)
+obsavestring (ptr, size, obstackp)
char *ptr;
int size;
+ struct obstack *obstackp;
{
- register char *p = (char *) obstack_alloc (symbol_obstack, size + 1);
- /* Open-coded bcopy--saves function call time.
- These strings are usually short. */
+ 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;
return p;
}
-/* Concatenate strings S1, S2 and S3; return the new string.
- Space is found in the symbol_obstack. */
+/* Concatenate strings S1, S2 and S3; return the new string. Space is found
+ in the obstack pointed to by OBSTACKP. */
char *
-obconcat (s1, s2, s3)
- char *s1, *s2, *s3;
+obconcat (obstackp, s1, s2, s3)
+ struct obstack *obstackp;
+ const char *s1, *s2, *s3;
{
register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1;
- register char *val = (char *) obstack_alloc (symbol_obstack, len);
+ register char *val = (char *) obstack_alloc (obstackp, len);
strcpy (val, s1);
strcat (val, s2);
strcat (val, s3);
return val;
}
-\f
-/* Accumulate the misc functions in bunches of 127.
- At the end, copy them all into one newly allocated structure. */
-
-#define MISC_BUNCH_SIZE 127
-
-struct misc_bunch
-{
- struct misc_bunch *next;
- struct misc_function contents[MISC_BUNCH_SIZE];
-};
-
-/* Bunch currently being filled up.
- The next field points to chain of filled bunches. */
-
-static struct misc_bunch *misc_bunch;
-/* Number of slots filled in current bunch. */
+/* True if we are nested inside psymtab_to_symtab. */
-static int misc_bunch_index;
+int currently_reading_symtab = 0;
-/* Total number of misc functions recorded so far. */
-
-static int misc_count;
-
-void
-init_misc_bunches ()
+static void
+decrement_reading_symtab (dummy)
+ void *dummy;
{
- misc_count = 0;
- misc_bunch = 0;
- misc_bunch_index = MISC_BUNCH_SIZE;
+ currently_reading_symtab--;
}
-void
-prim_record_misc_function (name, address, misc_type)
- char *name;
- CORE_ADDR address;
- enum misc_function_type misc_type;
+/* Get the symbol table that corresponds to a partial_symtab.
+ This is fast after the first time you do it. In fact, there
+ is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
+ case inline. */
+
+struct symtab *
+psymtab_to_symtab (pst)
+ register struct partial_symtab *pst;
{
- register struct misc_bunch *new;
+ /* If it's been looked up before, return it. */
+ if (pst->symtab)
+ return pst->symtab;
- if (misc_bunch_index == MISC_BUNCH_SIZE)
+ /* If it has not yet been read in, read it. */
+ if (!pst->readin)
{
- new = (struct misc_bunch *) xmalloc (sizeof (struct misc_bunch));
- misc_bunch_index = 0;
- new->next = misc_bunch;
- misc_bunch = new;
+ struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL);
+ currently_reading_symtab++;
+ (*pst->read_symtab) (pst);
+ do_cleanups (back_to);
}
- misc_bunch->contents[misc_bunch_index].name = name;
- misc_bunch->contents[misc_bunch_index].address = address;
- misc_bunch->contents[misc_bunch_index].type = misc_type;
- misc_bunch->contents[misc_bunch_index].misc_info = 0;
- misc_bunch_index++;
- misc_count++;
-}
-static int
-compare_misc_functions (fn1, fn2)
- struct misc_function *fn1, *fn2;
-{
- /* Return a signed result based on unsigned comparisons
- so that we sort into unsigned numeric order. */
- if (fn1->address < fn2->address)
- return -1;
- if (fn1->address > fn2->address)
- return 1;
- return 0;
+ return pst->symtab;
}
-/* ARGSUSED */
-void
-discard_misc_bunches (foo)
- int foo;
-{
- register struct misc_bunch *next;
-
- while (misc_bunch)
- {
- next = misc_bunch->next;
- free (misc_bunch);
- misc_bunch = next;
- }
-}
+/* Initialize entry point information for this objfile. */
-/* INCLINK nonzero means bunches are from an incrementally-linked file.
- Add them to the existing bunches.
- Otherwise INCLINK is zero, and we start from scratch. */
void
-condense_misc_bunches (inclink)
- int inclink;
+init_entry_point_info (objfile)
+ struct objfile *objfile;
{
- register int i, j;
- register struct misc_bunch *bunch;
+ /* Save startup file's range of PC addresses to help blockframe.c
+ decide where the bottom of the stack is. */
- if (inclink)
+ if (bfd_get_file_flags (objfile->obfd) & EXEC_P)
{
- misc_function_vector
- = (struct misc_function *)
- xrealloc (misc_function_vector, (misc_count + misc_function_count)
- * sizeof (struct misc_function));
- j = misc_function_count;
+ /* 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
{
- misc_function_vector
- = (struct misc_function *)
- xmalloc (misc_count * sizeof (struct misc_function));
- j = 0;
+ /* 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;
+}
- bunch = misc_bunch;
- while (bunch)
- {
- for (i = 0; i < misc_bunch_index; i++, j++)
- {
- misc_function_vector[j] = bunch->contents[i];
-#ifdef NAMES_HAVE_UNDERSCORE
- if (misc_function_vector[j].name[0] == '_')
- misc_function_vector[j].name++;
-#endif
- }
- bunch = bunch->next;
- misc_bunch_index = MISC_BUNCH_SIZE;
- }
+/* Get current entry point address. */
- if (misc_function_count + misc_count != j) /* DEBUG */
- printf_filtered ("Function counts are off! %d + %d != %d\n",
- misc_function_count, misc_count, j);
+CORE_ADDR
+entry_point_address ()
+{
+ return symfile_objfile ? symfile_objfile->ei.entry_point : 0;
+}
- misc_function_count = j;
+/* Remember the lowest-addressed loadable section we've seen.
+ This function is called via bfd_map_over_sections.
- /* Sort the misc functions by address. */
+ In case of equal vmas, the section with the largest size becomes the
+ lowest-addressed loadable section.
- qsort (misc_function_vector, misc_function_count,
- sizeof (struct misc_function),
- compare_misc_functions);
-}
+ If the vmas and sizes are equal, the last section is considered the
+ lowest-addressed loadable section. */
+void
+find_lowest_section (abfd, sect, obj)
+ bfd *abfd;
+ asection *sect;
+ PTR obj;
+{
+ asection **lowest = (asection **) obj;
-/* 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. */
+ 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;
+}
-struct symtab *
-psymtab_to_symtab (pst)
- register struct partial_symtab *pst;
-{
- register struct symtab *result;
+/* 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. */
- /* If it's been looked up before, return it. */
- if (pst->symtab)
- return pst->symtab;
+struct section_offsets *
+default_symfile_offsets (objfile, addr)
+ struct objfile *objfile;
+ CORE_ADDR addr;
+{
+ struct section_offsets *section_offsets;
+ int i;
- /* If it has not yet been read in, read it. */
- if (!pst->readin)
- {
- (*pst->read_symtab) (pst);
- }
+ objfile->num_sections = SECT_OFF_MAX;
+ section_offsets = (struct section_offsets *)
+ obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS);
+ memset (section_offsets, 0, SIZEOF_SECTION_OFFSETS);
- /* Search through list for correct name. */
- for (result = symtab_list; result; result = result->next)
- if (!strcmp (result->filename, pst->filename))
- {
- pst->symtab = result; /* Remember where it was. */
- return result;
- }
+ for (i = 0; i < SECT_OFF_MAX; i++)
+ ANOFFSET (section_offsets, i) = addr;
- return 0;
+ return section_offsets;
}
+
/* Process a symbol file, as either the main file or as a dynamically
loaded file.
- NAME is the file name (which will be tilde-expanded and made absolute
- herein). 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. */
+ NAME is the file name (which will be tilde-expanded and made
+ absolute herein) (but we don't free or modify NAME itself).
+ FROM_TTY says how verbose to be. MAINLINE specifies whether this
+ is the main symbol file, or whether it's an extra symbol file such
+ as dynamically loaded code. If !mainline, ADDR is the address
+ where the text segment was loaded. If VERBO, the caller has printed
+ a verbose message about the symbol reading (and complaints can be
+ more terse about it). */
void
-symbol_file_add (name, from_tty, addr, mainline)
- char *name;
- int from_tty;
+syms_from_objfile (objfile, addr, mainline, verbo)
+ struct objfile *objfile;
CORE_ADDR addr;
int mainline;
+ int verbo;
{
- bfd *sym_bfd;
- asection *text_sect;
- struct sym_fns *sf;
- char *realname;
+ struct section_offsets *section_offsets;
+ asection *lowest_sect;
+ struct cleanup *old_chain;
- sym_bfd = symfile_open (name);
+ init_entry_point_info (objfile);
+ find_sym_fns (objfile);
- entry_point = bfd_get_start_address (sym_bfd);
+ /* Make sure that partially constructed symbol tables will be cleaned up
+ if an error occurs during symbol reading. */
+ old_chain = make_cleanup ((make_cleanup_func) free_objfile, objfile);
if (mainline)
- symfile_mtime = bfd_get_mtime (sym_bfd);
+ {
+ /* We will modify the main symbol table, make sure that all its users
+ will be cleaned up if an error occurs during symbol reading. */
+ make_cleanup ((make_cleanup_func) clear_symtab_users, 0);
- /* There is a distinction between having no symbol table
- (we refuse to read the file, leaving the old set of symbols around)
- and having no debugging symbols in your symbol table (we read
- the file and end up with a mostly empty symbol table). */
+ /* Since no error yet, throw away the old symbol table. */
- if (!(bfd_get_file_flags (sym_bfd) & HAS_SYMS))
- {
- error ("%s has no symbol-table", name);
+ 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);
}
- if ((symtab_list || partial_symtab_list)
- && mainline
- && from_tty
- && !query ("Load new symbol table from \"%s\"? ", name))
- error ("Not confirmed.");
+ /* Convert addr into an offset rather than an absolute address.
+ We find the lowest address of a loaded segment in the objfile,
+ and assume that <addr> is where that got loaded. Due to historical
+ precedent, we warn if that doesn't happen to be a text segment. */
- if (from_tty)
+ if (mainline)
{
- printf_filtered ("Reading symbol data from %s...", name);
- wrap_here ("");
- fflush (stdout);
+ addr = 0; /* No offset from objfile addresses. */
+ }
+ else
+ {
+ lowest_sect = bfd_get_section_by_name (objfile->obfd, ".text");
+ if (lowest_sect == NULL)
+ bfd_map_over_sections (objfile->obfd, find_lowest_section,
+ (PTR) & lowest_sect);
+
+ if (lowest_sect == NULL)
+ warning ("no loadable sections found in added symbol-file %s",
+ objfile->name);
+ else if ((bfd_get_section_flags (objfile->obfd, lowest_sect) & SEC_CODE)
+ == 0)
+ /* FIXME-32x64--assumes bfd_vma fits in long. */
+ warning ("Lowest section in %s is %s at 0x%lx",
+ objfile->name,
+ bfd_section_name (objfile->obfd, lowest_sect),
+ (unsigned long) bfd_section_vma (objfile->obfd, lowest_sect));
+
+ if (lowest_sect)
+ addr -= bfd_section_vma (objfile->obfd, lowest_sect);
}
- sf = symfile_init (sym_bfd);
- realname = bfd_get_filename (sym_bfd);
- realname = savestring (realname, strlen (realname));
- /* FIXME, this probably creates a storage leak... */
+ /* 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. */
- if (mainline)
- {
- /* Since no error yet, throw away the old symbol table. */
+ (*objfile->sf->sym_init) (objfile);
+ clear_complaints (1, verbo);
+
+ section_offsets = (*objfile->sf->sym_offsets) (objfile, addr);
+ objfile->section_offsets = section_offsets;
- if (symfile)
- free (symfile);
- symfile = 0;
- free_all_symtabs ();
- free_all_psymtabs ();
+#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.
- (*sf->sym_new_init) ();
+ Section offsets are built similarly, except that they are built
+ by adding addr in all cases because there is no clear mapping
+ from section_offsets into actual sections. Note that solib.c
+ has a different algorythm for finding section offsets.
- /* For mainline, caller didn't know the specified address of the
- text section. We fix that here. */
- text_sect = bfd_get_section_by_name (sym_bfd, ".text");
- addr = bfd_section_vma (sym_bfd, text_sect);
+ These should probably all be collapsed into some target
+ independent form of shared library support. FIXME. */
+
+ if (addr)
+ {
+ struct obj_section *s;
+
+ for (s = objfile->sections; s < objfile->sections_end; ++s)
+ {
+ s->addr -= s->offset;
+ s->addr += addr;
+ s->endaddr -= s->offset;
+ s->endaddr += addr;
+ s->offset += addr;
+ }
}
+#endif /* not IBM6000_TARGET */
- clear_complaints(); /* Allow complaints to appear for this new file. */
+ (*objfile->sf->sym_read) (objfile, section_offsets, mainline);
- (*sf->sym_read) (sf, addr, 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 should do this for all the builtin types. */
+ /* 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;
- if (mainline)
- {
- /* OK, make it the "real" symbol file. */
- symfile = realname;
- symfile_fns = sf;
- }
+ /* Mark the objfile has having had initial symbol read attempted. Note
+ that this does not mean we found any symbols... */
- /* If we have wiped out any old symbol tables, clean up. */
- clear_symtab_users_once ();
+ objfile->flags |= OBJF_SYMS;
- if (from_tty)
- {
- printf_filtered ("done.\n");
- fflush (stdout);
- }
+ /* Discard cleanups as symbol reading was successful. */
+
+ discard_cleanups (old_chain);
+
+/* Call this after reading in a new symbol table to give target dependant code
+ a crack at the new symbols. For instance, this could be used to update the
+ values of target-specific symbols GDB needs to keep track of (such as
+ _sigtramp, or whatever). */
+
+ TARGET_SYMFILE_POSTREAD (objfile);
}
-/* This is the symbol-file command. Read the file, analyze its symbols,
- and add a struct symtab to symtab_list. */
+/* Perform required actions after either reading in the initial
+ symbols for a new objfile, or mapping in the symbols from a reusable
+ objfile. */
void
-symbol_file_command (name, from_tty)
- char *name;
- int from_tty;
+new_symfile_objfile (objfile, mainline, verbo)
+ struct objfile *objfile;
+ int mainline;
+ int verbo;
{
- dont_repeat ();
+ /* 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;
- if (name == 0)
+ clear_symtab_users ();
+ }
+ else
{
- if ((symtab_list || partial_symtab_list)
- && from_tty
- && !query ("Discard symbol table from `%s'? ", symfile))
- error ("Not confirmed.");
- if (symfile)
- free (symfile);
- symfile = 0;
- free_all_symtabs ();
- free_all_psymtabs ();
- /* FIXME, this does not account for the main file and subsequent
- files (shared libs, dynloads, etc) having different formats.
- It only calls the cleanup routine for the main file's format. */
- if (symfile_fns) {
- (*symfile_fns->sym_new_init) ();
- free (symfile_fns);
- symfile_fns = 0;
- }
- return;
+ breakpoint_re_set ();
}
- symbol_file_add (name, from_tty, (CORE_ADDR)0, 1);
+ /* We're done reading the symbol file; finish off complaints. */
+ clear_complaints (0, verbo);
}
-/* Open NAME and hand it off to BFD for preliminary analysis. Result
- is a BFD *, which includes a new copy of NAME dynamically allocated
- (which will be freed by the cleanup chain). In case of trouble,
- error() is called. */
+/* Process a symbol file, as either the main file or as a dynamically
+ loaded file.
+
+ NAME is the file name (which will be tilde-expanded and made
+ absolute herein) (but we don't free or modify NAME itself).
+ FROM_TTY says how verbose to be. MAINLINE specifies whether this
+ is the main symbol file, or whether it's an extra symbol file such
+ as dynamically loaded code. If !mainline, ADDR is the address
+ where the text segment was loaded.
+
+ USER_LOADED is TRUE if the add-symbol-file command was how this
+ symbol file came to be processed.
-static bfd *
-symfile_open (name)
+ IS_SOLIB is TRUE if this symbol file represents a solib, as discovered
+ by the target's implementation of the solib package.
+
+ Upon success, returns a pointer to the objfile that was added.
+ Upon failure, jumps back to command level (never returns). */
+
+struct objfile *
+symbol_file_add (name, from_tty, addr, mainline, mapped, readnow, user_loaded, is_solib)
char *name;
+ int from_tty;
+ CORE_ADDR addr;
+ int mainline;
+ int mapped;
+ int readnow;
+ int user_loaded;
+ int is_solib;
{
- bfd *sym_bfd;
- int desc;
- char *absolute_name;
+ struct objfile *objfile;
+ struct partial_symtab *psymtab;
+ bfd *abfd;
- name = tilde_expand (name);
- make_cleanup (free, name);
+ /* Open a bfd for the file, and give user a chance to burp if we'd be
+ interactively wiping out any existing symbols. */
- desc = openp (getenv ("PATH"), 1, name, O_RDONLY, 0, &absolute_name);
- if (desc < 0)
- perror_with_name (name);
+ 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, mapped, user_loaded, is_solib);
+
+ /* If the objfile uses a mapped symbol file, and we have a psymtab for
+ it, then skip reading any symbols at this time. */
+
+ if ((objfile->flags & OBJF_MAPPED) && (objfile->flags & OBJF_SYMS))
+ {
+ /* We mapped in an existing symbol table file that already has had
+ initial symbol reading performed, so we can skip that part. Notify
+ the user that instead of reading the symbols, they have been mapped.
+ */
+ if (from_tty || info_verbose)
+ {
+ printf_filtered ("Mapped symbols for %s...", name);
+ wrap_here ("");
+ gdb_flush (gdb_stdout);
+ }
+ init_entry_point_info (objfile);
+ find_sym_fns (objfile);
+ }
else
{
- make_cleanup (free, absolute_name);
- name = absolute_name;
+ /* We either created a new mapped symbol table, mapped an existing
+ symbol table file which has not had initial symbol reading
+ performed, or need to read an unmapped symbol table. */
+ if (from_tty || info_verbose)
+ {
+ if (pre_add_symbol_hook)
+ pre_add_symbol_hook (name);
+ else
+ {
+ printf_filtered ("Reading symbols from %s...", name);
+ wrap_here ("");
+ gdb_flush (gdb_stdout);
+ }
+ }
+ syms_from_objfile (objfile, addr, mainline, from_tty);
+ }
+
+ /* We now have at least a partial symbol table. Check to see if the
+ user requested that all symbols be read on initial access via either
+ the gdb startup command line or on a per symbol file basis. Expand
+ all partial symbol tables for this objfile if so. */
+
+ if (readnow || readnow_symbol_files)
+ {
+ if (from_tty || info_verbose)
+ {
+ printf_filtered ("expanding to full symbols...");
+ wrap_here ("");
+ gdb_flush (gdb_stdout);
+ }
+
+ for (psymtab = objfile->psymtabs;
+ psymtab != NULL;
+ psymtab = psymtab->next)
+ {
+ psymtab_to_symtab (psymtab);
+ }
}
- sym_bfd = bfd_fdopenr (name, NULL, desc);
- if (!sym_bfd)
+ if (from_tty || info_verbose)
{
- close (desc);
- error ("Could not open `%s' to read symbols: %s",
- name, bfd_errmsg (bfd_error));
+ if (post_add_symbol_hook)
+ post_add_symbol_hook ();
+ else
+ {
+ printf_filtered ("done.\n");
+ gdb_flush (gdb_stdout);
+ }
}
- make_cleanup (bfd_close, sym_bfd);
- if (!bfd_check_format (sym_bfd, bfd_object))
- error ("\"%s\": can't read symbols: %s.",
- name, bfd_errmsg (bfd_error));
+ new_symfile_objfile (objfile, mainline, from_tty);
- return sym_bfd;
+ target_new_objfile (objfile);
+
+ return (objfile);
}
-/* Link a new symtab_fns into the global symtab_fns list.
- Called by various _initialize routines. */
+/* This is the symbol-file command. Read the file, analyze its
+ symbols, and add a struct symtab to a symtab list. The syntax of
+ the command is rather bizarre--(1) buildargv implements various
+ quoting conventions which are undocumented and have little or
+ nothing in common with the way things are quoted (or not quoted)
+ elsewhere in GDB, (2) options are used, which are not generally
+ used in GDB (perhaps "set mapped on", "set readnow on" would be
+ better), (3) the order of options matters, which is contrary to GNU
+ conventions (because it is confusing and inconvenient). */
void
-add_symtab_fns (sf)
- struct sym_fns *sf;
+symbol_file_command (args, from_tty)
+ char *args;
+ int from_tty;
{
- sf->next = symtab_fns;
- symtab_fns = sf;
-}
+ char **argv;
+ char *name = NULL;
+ CORE_ADDR text_relocation = 0; /* text_relocation */
+ struct cleanup *cleanups;
+ int mapped = 0;
+ int readnow = 0;
+ dont_repeat ();
-/* Initialize to read symbols from the symbol file sym_bfd. It either
- returns or calls error(). The result is a malloc'd struct sym_fns
- that contains cached information about the symbol file. */
-
-static struct sym_fns *
-symfile_init (sym_bfd)
- bfd *sym_bfd;
-{
- struct sym_fns *sf, *sf2;
-
- for (sf = symtab_fns; sf != NULL; sf = sf->next)
+ if (args == NULL)
{
- if (!strncmp (bfd_get_target (sym_bfd), sf->sym_name, sf->sym_namelen))
- {
- sf2 = (struct sym_fns *)xmalloc (sizeof (*sf2));
- /* FIXME, who frees this? */
- *sf2 = *sf;
- sf2->sym_bfd = sym_bfd;
- sf2->sym_private = 0; /* Not alloc'd yet */
- (*sf2->sym_init) (sf2);
- return sf2;
- }
+ if ((have_full_symbols () || have_partial_symbols ())
+ && from_tty
+ && !query ("Discard symbol table from `%s'? ",
+ symfile_objfile->name))
+ error ("Not confirmed.");
+ free_all_objfiles ();
+
+ /* solib descriptors may have handles to objfiles. Since their
+ storage has just been released, we'd better wipe the solib
+ descriptors as well.
+ */
+#if defined(SOLIB_RESTART)
+ SOLIB_RESTART ();
+#endif
+
+ symfile_objfile = NULL;
+ if (from_tty)
+ {
+ printf_unfiltered ("No symbol file now.\n");
+ }
+#ifdef HPUXHPPA
+ RESET_HP_UX_GLOBALS ();
+#endif
+ }
+ else
+ {
+ if ((argv = buildargv (args)) == NULL)
+ {
+ nomem (0);
+ }
+ cleanups = make_cleanup_freeargv (argv);
+ while (*argv != NULL)
+ {
+ if (STREQ (*argv, "-mapped"))
+ {
+ mapped = 1;
+ }
+ else if (STREQ (*argv, "-readnow"))
+ {
+ readnow = 1;
+ }
+ else if (**argv == '-')
+ {
+ error ("unknown option `%s'", *argv);
+ }
+ else
+ {
+ char *p;
+
+ name = *argv;
+
+ /* this is for rombug remote only, to get the text relocation by
+ using link command */
+ p = strrchr (name, '/');
+ if (p != NULL)
+ p++;
+ else
+ p = name;
+
+ target_link (p, &text_relocation);
+
+ if (text_relocation == (CORE_ADDR) 0)
+ return;
+ else if (text_relocation == (CORE_ADDR) -1)
+ {
+ symbol_file_add (name, from_tty, (CORE_ADDR) 0,
+ 1, mapped, readnow, 1, 0);
+#ifdef HPUXHPPA
+ RESET_HP_UX_GLOBALS ();
+#endif
+ }
+ else
+ symbol_file_add (name, from_tty, (CORE_ADDR) text_relocation,
+ 0, mapped, readnow, 1, 0);
+
+ /* Getting new symbols may change our opinion about what is
+ frameless. */
+ reinit_frame_cache ();
+
+ set_initial_language ();
+ }
+ argv++;
+ }
+
+ if (name == NULL)
+ {
+ error ("no symbol file name was specified");
+ }
+ TUIDO (((TuiOpaqueFuncPtr) tuiDisplayMainFunction));
+ do_cleanups (cleanups);
+ }
+}
+
+/* Set the initial language.
+
+ A better solution would be to record the language in the psymtab when reading
+ partial symbols, and then use it (if known) to set the language. This would
+ be a win for formats that encode the language in an easily discoverable place,
+ such as DWARF. For stabs, we can jump through hoops looking for specially
+ named symbols or try to intuit the language from the specific type of stabs
+ we find, but we can't do that until later when we read in full symbols.
+ FIXME. */
+
+static void
+set_initial_language ()
+{
+ struct partial_symtab *pst;
+ enum language lang = language_unknown;
+
+ pst = find_main_psymtab ();
+ if (pst != NULL)
+ {
+ if (pst->filename != NULL)
+ {
+ lang = deduce_language_from_filename (pst->filename);
+ }
+ if (lang == language_unknown)
+ {
+ /* Make C the default language */
+ lang = language_c;
+ }
+ set_language (lang);
+ expected_language = current_language; /* Don't warn the user */
+ }
+}
+
+/* Open file specified by NAME and hand it off to BFD for preliminary
+ analysis. Result is a newly initialized bfd *, which includes a newly
+ malloc'd` copy of NAME (tilde-expanded and made absolute).
+ In case of trouble, error() is called. */
+
+bfd *
+symfile_bfd_open (name)
+ char *name;
+{
+ bfd *sym_bfd;
+ int desc;
+ char *absolute_name;
+
+
+
+ name = tilde_expand (name); /* Returns 1st new malloc'd copy */
+
+ /* Look down path for it, allocate 2nd new malloc'd copy. */
+ desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name);
+#if defined(__GO32__) || defined(_WIN32)
+ if (desc < 0)
+ {
+ char *exename = alloca (strlen (name) + 5);
+ strcat (strcpy (exename, name), ".exe");
+ desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY,
+ 0, &absolute_name);
+ }
+#endif
+ if (desc < 0)
+ {
+ make_cleanup (free, name);
+ perror_with_name (name);
+ }
+ free (name); /* Free 1st new malloc'd copy */
+ name = absolute_name; /* Keep 2nd malloc'd copy in bfd */
+ /* It'll be freed in free_objfile(). */
+
+ sym_bfd = bfd_fdopenr (name, gnutarget, desc);
+ if (!sym_bfd)
+ {
+ close (desc);
+ make_cleanup (free, name);
+ error ("\"%s\": can't open to read symbols: %s.", name,
+ bfd_errmsg (bfd_get_error ()));
+ }
+ sym_bfd->cacheable = true;
+
+ if (!bfd_check_format (sym_bfd, bfd_object))
+ {
+ /* FIXME: should be checking for errors from bfd_close (for one thing,
+ on error it does not free all the storage associated with the
+ bfd). */
+ bfd_close (sym_bfd); /* This also closes desc */
+ make_cleanup (free, name);
+ error ("\"%s\": can't read symbols: %s.", name,
+ bfd_errmsg (bfd_get_error ()));
+ }
+ return (sym_bfd);
+}
+
+/* Link a new symtab_fns into the global symtab_fns list. Called on gdb
+ startup by the _initialize routine in each object file format reader,
+ to register information about each format the the reader is prepared
+ to handle. */
+
+void
+add_symtab_fns (sf)
+ struct sym_fns *sf;
+{
+ sf->next = symtab_fns;
+ symtab_fns = sf;
+}
+
+
+/* Initialize to read symbols from the symbol file sym_bfd. It either
+ returns or calls error(). The result is an initialized struct sym_fns
+ in the objfile structure, that contains cached information about the
+ symbol file. */
+
+static void
+find_sym_fns (objfile)
+ struct objfile *objfile;
+{
+ struct sym_fns *sf;
+ enum bfd_flavour our_flavour = bfd_get_flavour (objfile->obfd);
+ char *our_target = bfd_get_target (objfile->obfd);
+
+ /* Special kludge for RS/6000 and PowerMac. See xcoffread.c. */
+ if (STREQ (our_target, "aixcoff-rs6000") ||
+ STREQ (our_target, "xcoff-powermac"))
+ our_flavour = (enum bfd_flavour) -1;
+
+ /* Special kludge for apollo. See dstread.c. */
+ if (STREQN (our_target, "apollo", 6))
+ our_flavour = (enum bfd_flavour) -2;
+
+ for (sf = symtab_fns; sf != NULL; sf = sf->next)
+ {
+ if (our_flavour == sf->sym_flavour)
+ {
+ objfile->sf = sf;
+ return;
+ }
+ }
+ error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
+ bfd_get_target (objfile->obfd));
+}
+\f
+/* This function runs the load command of our current target. */
+
+static void
+load_command (arg, from_tty)
+ char *arg;
+ int from_tty;
+{
+ if (arg == NULL)
+ arg = get_exec_file (1);
+ target_load (arg, from_tty);
+}
+
+/* This version of "load" should be usable for any target. Currently
+ it is just used for remote targets, not inftarg.c or core files,
+ on the theory that only in that case is it useful.
+
+ Avoiding xmodem and the like seems like a win (a) because we don't have
+ to worry about finding it, and (b) On VMS, fork() is very slow and so
+ we don't want to run a subprocess. On the other hand, I'm not sure how
+ performance compares. */
+#define GENERIC_LOAD_CHUNK 256
+#define VALIDATE_DOWNLOAD 0
+void
+generic_load (filename, from_tty)
+ char *filename;
+ int from_tty;
+{
+ struct cleanup *old_cleanups;
+ asection *s;
+ bfd *loadfile_bfd;
+ time_t start_time, end_time; /* Start and end times of download */
+ unsigned long data_count = 0; /* Number of bytes transferred to memory */
+ int n;
+ unsigned long load_offset = 0; /* offset to add to vma for each section */
+ char buf[GENERIC_LOAD_CHUNK + 8];
+#if VALIDATE_DOWNLOAD
+ char verify_buffer[GENERIC_LOAD_CHUNK + 8];
+#endif
+
+ /* enable user to specify address for downloading as 2nd arg to load */
+ n = sscanf (filename, "%s 0x%lx", buf, &load_offset);
+ if (n > 1)
+ filename = buf;
+ else
+ load_offset = 0;
+
+ loadfile_bfd = bfd_openr (filename, gnutarget);
+ if (loadfile_bfd == NULL)
+ {
+ perror_with_name (filename);
+ return;
+ }
+ /* FIXME: should be checking for errors from bfd_close (for one thing,
+ on error it does not free all the storage associated with the
+ bfd). */
+ old_cleanups = make_cleanup ((make_cleanup_func) bfd_close, loadfile_bfd);
+
+ if (!bfd_check_format (loadfile_bfd, bfd_object))
+ {
+ error ("\"%s\" is not an object file: %s", filename,
+ bfd_errmsg (bfd_get_error ()));
+ }
+
+ start_time = time (NULL);
+
+ for (s = loadfile_bfd->sections; s; s = s->next)
+ {
+ if (s->flags & SEC_LOAD)
+ {
+ bfd_size_type size;
+
+ size = bfd_get_section_size_before_reloc (s);
+ if (size > 0)
+ {
+ char *buffer;
+ struct cleanup *old_chain;
+ bfd_vma lma;
+ unsigned long l = size;
+ int err;
+ char *sect;
+ unsigned long sent;
+ unsigned long len;
+
+ l = l > GENERIC_LOAD_CHUNK ? GENERIC_LOAD_CHUNK : l;
+
+ buffer = xmalloc (size);
+ old_chain = make_cleanup (free, buffer);
+
+ lma = s->lma;
+ lma += load_offset;
+
+ /* Is this really necessary? I guess it gives the user something
+ to look at during a long download. */
+ printf_filtered ("Loading section %s, size 0x%lx lma ",
+ bfd_get_section_name (loadfile_bfd, s),
+ (unsigned long) size);
+ print_address_numeric (lma, 1, gdb_stdout);
+ printf_filtered ("\n");
+
+ bfd_get_section_contents (loadfile_bfd, s, buffer, 0, size);
+
+ sect = (char *) bfd_get_section_name (loadfile_bfd, s);
+ sent = 0;
+ do
+ {
+ len = (size - sent) < l ? (size - sent) : l;
+ sent += len;
+ err = target_write_memory (lma, buffer, len);
+ if (ui_load_progress_hook)
+ if (ui_load_progress_hook (sect, sent))
+ error ("Canceled the download");
+#if VALIDATE_DOWNLOAD
+ /* Broken memories and broken monitors manifest themselves
+ here when bring new computers to life.
+ This doubles already slow downloads.
+ */
+ if (err)
+ break;
+ {
+ target_read_memory (lma, verify_buffer, len);
+ if (0 != bcmp (buffer, verify_buffer, len))
+ error ("Download verify failed at %08x",
+ (unsigned long) lma);
+ }
+
+#endif
+ data_count += len;
+ lma += len;
+ buffer += len;
+ } /* od */
+ while (err == 0 && sent < size);
+
+ if (err != 0)
+ error ("Memory access error while loading section %s.",
+ bfd_get_section_name (loadfile_bfd, s));
+
+ do_cleanups (old_chain);
+ }
+ }
+ }
+
+ end_time = time (NULL);
+ {
+ unsigned long entry;
+ entry = bfd_get_start_address (loadfile_bfd);
+ printf_filtered ("Start address 0x%lx , load size %d\n", entry, data_count);
+ /* We were doing this in remote-mips.c, I suspect it is right
+ for other targets too. */
+ write_pc (entry);
+ }
+
+ /* FIXME: are we supposed to call symbol_file_add or not? According to
+ a comment from remote-mips.c (where a call to symbol_file_add was
+ commented out), making the call confuses GDB if more than one file is
+ loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
+ does. */
+
+ report_transfer_performance (data_count, start_time, end_time);
+
+ do_cleanups (old_cleanups);
+}
+
+/* Report how fast the transfer went. */
+
+void
+report_transfer_performance (data_count, start_time, end_time)
+ unsigned long data_count;
+ time_t start_time, end_time;
+{
+ printf_filtered ("Transfer rate: ");
+ if (end_time != start_time)
+ printf_filtered ("%d bits/sec",
+ (data_count * 8) / (end_time - start_time));
+ else
+ printf_filtered ("%d bits in <1 sec", (data_count * 8));
+ printf_filtered (".\n");
+}
+
+/* This function allows the addition of incrementally linked object files.
+ It does not modify any state in the target, only in the debugger. */
+
+/* ARGSUSED */
+static void
+add_symbol_file_command (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ char *name = NULL;
+ CORE_ADDR text_addr;
+ char *arg;
+ int readnow = 0;
+ int mapped = 0;
+
+ dont_repeat ();
+
+ if (args == NULL)
+ {
+ error ("add-symbol-file takes a file name and an address");
+ }
+
+ /* Make a copy of the string that we can safely write into. */
+
+ args = strdup (args);
+ make_cleanup (free, args);
+
+ /* Pick off any -option args and the file name. */
+
+ while ((*args != '\000') && (name == NULL))
+ {
+ while (isspace (*args))
+ {
+ args++;
+ }
+ arg = args;
+ while ((*args != '\000') && !isspace (*args))
+ {
+ args++;
+ }
+ if (*args != '\000')
+ {
+ *args++ = '\000';
+ }
+ if (*arg != '-')
+ {
+ name = arg;
+ }
+ else if (STREQ (arg, "-mapped"))
+ {
+ mapped = 1;
+ }
+ else if (STREQ (arg, "-readnow"))
+ {
+ readnow = 1;
+ }
+ else
+ {
+ error ("unknown option `%s'", arg);
+ }
+ }
+
+ /* After picking off any options and the file name, args should be
+ left pointing at the remainder of the command line, which should
+ be the address expression to evaluate. */
+
+ if (name == NULL)
+ {
+ error ("add-symbol-file takes a file name");
+ }
+ name = tilde_expand (name);
+ make_cleanup (free, name);
+
+ if (*args != '\000')
+ {
+ text_addr = parse_and_eval_address (args);
+ }
+ else
+ {
+ target_link (name, &text_addr);
+ if (text_addr == (CORE_ADDR) -1)
+ error ("Don't know how to get text start location for this file");
+ }
+
+ /* FIXME-32x64: Assumes text_addr fits in a long. */
+ if ((from_tty)
+ && (!query ("add symbol table from file \"%s\" at text_addr = %s?\n",
+ name, local_hex_string ((unsigned long) text_addr))))
+ error ("Not confirmed.");
+
+ symbol_file_add (name, from_tty, text_addr, 0, mapped, readnow,
+ 1, /* user_loaded */
+ 0); /* We'll guess it's ! is_solib */
+
+ /* Getting new symbols may change our opinion about what is
+ frameless. */
+ reinit_frame_cache ();
+}
+\f
+static void
+add_shared_symbol_files_command (args, from_tty)
+ char *args;
+ int from_tty;
+{
+#ifdef ADD_SHARED_SYMBOL_FILES
+ ADD_SHARED_SYMBOL_FILES (args, from_tty);
+#else
+ error ("This command is not available in this configuration of GDB.");
+#endif
+}
+\f
+/* Re-read symbols if a symbol-file has changed. */
+void
+reread_symbols ()
+{
+ struct objfile *objfile;
+ long new_modtime;
+ int reread_one = 0;
+ struct stat new_statbuf;
+ int res;
+
+ /* With the addition of shared libraries, this should be modified,
+ the load time should be saved in the partial symbol tables, since
+ different tables may come from different source files. FIXME.
+ This routine should then walk down each partial symbol table
+ and see if the symbol table that it originates from has been changed */
+
+ for (objfile = object_files; objfile; objfile = objfile->next)
+ {
+ if (objfile->obfd)
+ {
+#ifdef IBM6000_TARGET
+ /* If this object is from a shared library, then you should
+ stat on the library name, not member name. */
+
+ if (objfile->obfd->my_archive)
+ res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
+ else
+#endif
+ res = stat (objfile->name, &new_statbuf);
+ if (res != 0)
+ {
+ /* FIXME, should use print_sys_errmsg but it's not filtered. */
+ printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
+ objfile->name);
+ continue;
+ }
+ new_modtime = new_statbuf.st_mtime;
+ if (new_modtime != objfile->mtime)
+ {
+ struct cleanup *old_cleanups;
+ struct section_offsets *offsets;
+ int num_offsets;
+ int section_offsets_size;
+ char *obfd_filename;
+
+ printf_filtered ("`%s' has changed; re-reading symbols.\n",
+ objfile->name);
+
+ /* There are various functions like symbol_file_add,
+ symfile_bfd_open, syms_from_objfile, etc., which might
+ appear to do what we want. But they have various other
+ effects which we *don't* want. So we just do stuff
+ ourselves. We don't worry about mapped files (for one thing,
+ any mapped file will be out of date). */
+
+ /* If we get an error, blow away this objfile (not sure if
+ that is the correct response for things like shared
+ libraries). */
+ old_cleanups = make_cleanup ((make_cleanup_func) free_objfile,
+ objfile);
+ /* We need to do this whenever any symbols go away. */
+ make_cleanup ((make_cleanup_func) clear_symtab_users, 0);
+
+ /* Clean up any state BFD has sitting around. We don't need
+ to close the descriptor but BFD lacks a way of closing the
+ BFD without closing the descriptor. */
+ obfd_filename = bfd_get_filename (objfile->obfd);
+ if (!bfd_close (objfile->obfd))
+ error ("Can't close BFD for %s: %s", objfile->name,
+ bfd_errmsg (bfd_get_error ()));
+ objfile->obfd = bfd_openr (obfd_filename, gnutarget);
+ if (objfile->obfd == NULL)
+ error ("Can't open %s to read symbols.", objfile->name);
+ /* bfd_openr sets cacheable to true, which is what we want. */
+ if (!bfd_check_format (objfile->obfd, bfd_object))
+ error ("Can't read symbols from %s: %s.", objfile->name,
+ bfd_errmsg (bfd_get_error ()));
+
+ /* Save the offsets, we will nuke them with the rest of the
+ psymbol_obstack. */
+ num_offsets = objfile->num_sections;
+ section_offsets_size =
+ sizeof (struct section_offsets)
+ + sizeof (objfile->section_offsets->offsets) * num_offsets;
+ offsets = (struct section_offsets *) alloca (section_offsets_size);
+ memcpy (offsets, objfile->section_offsets, section_offsets_size);
+
+ /* Nuke all the state that we will re-read. Much of the following
+ code which sets things to NULL really is necessary to tell
+ other parts of GDB that there is nothing currently there. */
+
+ /* FIXME: Do we have to free a whole linked list, or is this
+ enough? */
+ if (objfile->global_psymbols.list)
+ mfree (objfile->md, objfile->global_psymbols.list);
+ memset (&objfile->global_psymbols, 0,
+ sizeof (objfile->global_psymbols));
+ if (objfile->static_psymbols.list)
+ mfree (objfile->md, objfile->static_psymbols.list);
+ memset (&objfile->static_psymbols, 0,
+ sizeof (objfile->static_psymbols));
+
+ /* Free the obstacks for non-reusable objfiles */
+ obstack_free (&objfile->psymbol_cache.cache, 0);
+ memset (&objfile->psymbol_cache, 0,
+ sizeof (objfile->psymbol_cache));
+ obstack_free (&objfile->psymbol_obstack, 0);
+ obstack_free (&objfile->symbol_obstack, 0);
+ obstack_free (&objfile->type_obstack, 0);
+ objfile->sections = NULL;
+ objfile->symtabs = NULL;
+ objfile->psymtabs = NULL;
+ objfile->free_psymtabs = NULL;
+ objfile->msymbols = NULL;
+ objfile->minimal_symbol_count = 0;
+ objfile->fundamental_types = NULL;
+ if (objfile->sf != NULL)
+ {
+ (*objfile->sf->sym_finish) (objfile);
+ }
+
+ /* We never make this a mapped file. */
+ objfile->md = NULL;
+ /* obstack_specify_allocation also initializes the obstack so
+ it is empty. */
+ obstack_specify_allocation (&objfile->psymbol_cache.cache, 0, 0,
+ xmalloc, free);
+ obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0,
+ xmalloc, free);
+ obstack_specify_allocation (&objfile->symbol_obstack, 0, 0,
+ xmalloc, free);
+ obstack_specify_allocation (&objfile->type_obstack, 0, 0,
+ xmalloc, free);
+ if (build_objfile_section_table (objfile))
+ {
+ error ("Can't find the file sections in `%s': %s",
+ objfile->name, bfd_errmsg (bfd_get_error ()));
+ }
+
+ /* We use the same section offsets as from last time. I'm not
+ sure whether that is always correct for shared libraries. */
+ objfile->section_offsets = (struct section_offsets *)
+ obstack_alloc (&objfile->psymbol_obstack, section_offsets_size);
+ memcpy (objfile->section_offsets, offsets, section_offsets_size);
+ objfile->num_sections = num_offsets;
+
+ /* What the hell is sym_new_init for, anyway? The concept of
+ distinguishing between the main file and additional files
+ in this way seems rather dubious. */
+ if (objfile == symfile_objfile)
+ {
+ (*objfile->sf->sym_new_init) (objfile);
+#ifdef HPUXHPPA
+ RESET_HP_UX_GLOBALS ();
+#endif
+ }
+
+ (*objfile->sf->sym_init) (objfile);
+ clear_complaints (1, 1);
+ /* The "mainline" parameter is a hideous hack; I think leaving it
+ zero is OK since dbxread.c also does what it needs to do if
+ objfile->global_psymbols.size is 0. */
+ (*objfile->sf->sym_read) (objfile, objfile->section_offsets, 0);
+ if (!have_partial_symbols () && !have_full_symbols ())
+ {
+ wrap_here ("");
+ printf_filtered ("(no debugging symbols found)\n");
+ wrap_here ("");
+ }
+ objfile->flags |= OBJF_SYMS;
+
+ /* We're done reading the symbol file; finish off complaints. */
+ clear_complaints (0, 1);
+
+ /* Getting new symbols may change our opinion about what is
+ frameless. */
+
+ reinit_frame_cache ();
+
+ /* Discard cleanups as symbol reading was successful. */
+ discard_cleanups (old_cleanups);
+
+ /* If the mtime has changed between the time we set new_modtime
+ and now, we *want* this to be out of date, so don't call stat
+ again now. */
+ objfile->mtime = new_modtime;
+ reread_one = 1;
+
+ /* Call this after reading in a new symbol table to give target
+ dependant code a crack at the new symbols. For instance, this
+ could be used to update the values of target-specific symbols GDB
+ needs to keep track of (such as _sigtramp, or whatever). */
+
+ TARGET_SYMFILE_POSTREAD (objfile);
+ }
+ }
+ }
+
+ if (reread_one)
+ clear_symtab_users ();
+}
+\f
+
+
+typedef struct
+{
+ char *ext;
+ enum language lang;
+}
+filename_language;
+
+static filename_language *filename_language_table;
+static int fl_table_size, fl_table_next;
+
+static void
+add_filename_language (ext, lang)
+ char *ext;
+ enum language lang;
+{
+ if (fl_table_next >= fl_table_size)
+ {
+ fl_table_size += 10;
+ filename_language_table = realloc (filename_language_table,
+ fl_table_size);
+ }
+
+ filename_language_table[fl_table_next].ext = strsave (ext);
+ filename_language_table[fl_table_next].lang = lang;
+ fl_table_next++;
+}
+
+static char *ext_args;
+
+static void
+set_ext_lang_command (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ int i;
+ char *cp = ext_args;
+ enum language lang;
+
+ /* First arg is filename extension, starting with '.' */
+ if (*cp != '.')
+ error ("'%s': Filename extension must begin with '.'", ext_args);
+
+ /* Find end of first arg. */
+ while (*cp && !isspace (*cp))
+ cp++;
+
+ if (*cp == '\0')
+ error ("'%s': two arguments required -- filename extension and language",
+ ext_args);
+
+ /* Null-terminate first arg */
+ *cp++ = '\0';
+
+ /* Find beginning of second arg, which should be a source language. */
+ while (*cp && isspace (*cp))
+ cp++;
+
+ if (*cp == '\0')
+ error ("'%s': two arguments required -- filename extension and language",
+ ext_args);
+
+ /* Lookup the language from among those we know. */
+ lang = language_enum (cp);
+
+ /* Now lookup the filename extension: do we already know it? */
+ for (i = 0; i < fl_table_next; i++)
+ if (0 == strcmp (ext_args, filename_language_table[i].ext))
+ break;
+
+ if (i >= fl_table_next)
+ {
+ /* new file extension */
+ add_filename_language (ext_args, lang);
+ }
+ else
+ {
+ /* redefining a previously known filename extension */
+
+ /* if (from_tty) */
+ /* query ("Really make files of type %s '%s'?", */
+ /* ext_args, language_str (lang)); */
+
+ free (filename_language_table[i].ext);
+ filename_language_table[i].ext = strsave (ext_args);
+ filename_language_table[i].lang = lang;
+ }
+}
+
+static void
+info_ext_lang_command (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ int i;
+
+ printf_filtered ("Filename extensions and the languages they represent:");
+ printf_filtered ("\n\n");
+ for (i = 0; i < fl_table_next; i++)
+ printf_filtered ("\t%s\t- %s\n",
+ filename_language_table[i].ext,
+ language_str (filename_language_table[i].lang));
+}
+
+static void
+init_filename_language_table ()
+{
+ if (fl_table_size == 0) /* protect against repetition */
+ {
+ fl_table_size = 20;
+ fl_table_next = 0;
+ filename_language_table =
+ xmalloc (fl_table_size * sizeof (*filename_language_table));
+ add_filename_language (".c", language_c);
+ add_filename_language (".C", language_cplus);
+ add_filename_language (".cc", language_cplus);
+ add_filename_language (".cp", language_cplus);
+ add_filename_language (".cpp", language_cplus);
+ add_filename_language (".cxx", language_cplus);
+ add_filename_language (".c++", language_cplus);
+ 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);
+ }
+}
+
+enum language
+deduce_language_from_filename (filename)
+ char *filename;
+{
+ int i;
+ char *cp;
+
+ if (filename != NULL)
+ if ((cp = strrchr (filename, '.')) != NULL)
+ for (i = 0; i < fl_table_next; i++)
+ if (strcmp (cp, filename_language_table[i].ext) == 0)
+ return filename_language_table[i].lang;
+
+ return language_unknown;
+}
+\f
+/* allocate_symtab:
+
+ Allocate and partly initialize a new symbol table. Return a pointer
+ to it. error() if no space.
+
+ Caller must set these fields:
+ LINETABLE(symtab)
+ symtab->blockvector
+ symtab->dirname
+ symtab->free_code
+ symtab->free_ptr
+ possibly free_named_symtabs (symtab->filename);
+ */
+
+struct symtab *
+allocate_symtab (filename, objfile)
+ char *filename;
+ struct objfile *objfile;
+{
+ register struct symtab *symtab;
+
+ symtab = (struct symtab *)
+ obstack_alloc (&objfile->symbol_obstack, sizeof (struct symtab));
+ memset (symtab, 0, sizeof (*symtab));
+ symtab->filename = obsavestring (filename, strlen (filename),
+ &objfile->symbol_obstack);
+ symtab->fullname = NULL;
+ symtab->language = deduce_language_from_filename (filename);
+ symtab->debugformat = obsavestring ("unknown", 7,
+ &objfile->symbol_obstack);
+
+ /* Hook it to the objfile it comes from */
+
+ symtab->objfile = objfile;
+ symtab->next = objfile->symtabs;
+ objfile->symtabs = symtab;
+
+ /* FIXME: This should go away. It is only defined for the Z8000,
+ and the Z8000 definition of this macro doesn't have anything to
+ do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
+ here for convenience. */
+#ifdef INIT_EXTRA_SYMTAB_INFO
+ INIT_EXTRA_SYMTAB_INFO (symtab);
+#endif
+
+ return (symtab);
+}
+
+struct partial_symtab *
+allocate_psymtab (filename, objfile)
+ char *filename;
+ struct objfile *objfile;
+{
+ struct partial_symtab *psymtab;
+
+ if (objfile->free_psymtabs)
+ {
+ psymtab = objfile->free_psymtabs;
+ objfile->free_psymtabs = psymtab->next;
+ }
+ else
+ psymtab = (struct partial_symtab *)
+ obstack_alloc (&objfile->psymbol_obstack,
+ sizeof (struct partial_symtab));
+
+ memset (psymtab, 0, sizeof (struct partial_symtab));
+ psymtab->filename = obsavestring (filename, strlen (filename),
+ &objfile->psymbol_obstack);
+ psymtab->symtab = NULL;
+
+ /* Prepend it to the psymtab list for the objfile it belongs to.
+ Psymtabs are searched in most recent inserted -> least recent
+ inserted order. */
+
+ psymtab->objfile = objfile;
+ psymtab->next = objfile->psymtabs;
+ objfile->psymtabs = psymtab;
+#if 0
+ {
+ struct partial_symtab **prev_pst;
+ psymtab->objfile = objfile;
+ psymtab->next = NULL;
+ prev_pst = &(objfile->psymtabs);
+ while ((*prev_pst) != NULL)
+ prev_pst = &((*prev_pst)->next);
+ (*prev_pst) = psymtab;
+ }
+#endif
+
+ return (psymtab);
+}
+
+void
+discard_psymtab (pst)
+ struct partial_symtab *pst;
+{
+ struct partial_symtab **prev_pst;
+
+ /* From dbxread.c:
+ Empty psymtabs happen as a result of header files which don't
+ have any symbols in them. There can be a lot of them. But this
+ check is wrong, in that a psymtab with N_SLINE entries but
+ nothing else is not empty, but we don't realize that. Fixing
+ that without slowing things down might be tricky. */
+
+ /* First, snip it out of the psymtab chain */
+
+ prev_pst = &(pst->objfile->psymtabs);
+ while ((*prev_pst) != pst)
+ prev_pst = &((*prev_pst)->next);
+ (*prev_pst) = pst->next;
+
+ /* Next, put it on a free list for recycling */
+
+ pst->next = pst->objfile->free_psymtabs;
+ pst->objfile->free_psymtabs = pst;
+}
+\f
+
+/* Reset all data structures in gdb which may contain references to symbol
+ table data. */
+
+void
+clear_symtab_users ()
+{
+ /* Someday, we should do better than this, by only blowing away
+ the things that really need to be blown. */
+ clear_value_history ();
+ clear_displays ();
+ clear_internalvars ();
+ breakpoint_re_set ();
+ set_default_breakpoint (0, 0, 0, 0);
+ current_source_symtab = 0;
+ current_source_line = 0;
+ clear_pc_function_cache ();
+ target_new_objfile (NULL);
+}
+
+/* clear_symtab_users_once:
+
+ This function is run after symbol reading, or from a cleanup.
+ If an old symbol table was obsoleted, the old symbol table
+ has been blown away, but the other GDB data structures that may
+ reference it have not yet been cleared or re-directed. (The old
+ symtab was zapped, and the cleanup queued, in free_named_symtab()
+ below.)
+
+ This function can be queued N times as a cleanup, or called
+ directly; it will do all the work the first time, and then will be a
+ no-op until the next time it is queued. This works by bumping a
+ counter at queueing time. Much later when the cleanup is run, or at
+ the end of symbol processing (in case the cleanup is discarded), if
+ the queued count is greater than the "done-count", we do the work
+ and set the done-count to the queued count. If the queued count is
+ less than or equal to the done-count, we just ignore the call. This
+ is needed because reading a single .o file will often replace many
+ symtabs (one per .h file, for example), and we don't want to reset
+ the breakpoints N times in the user's face.
+
+ The reason we both queue a cleanup, and call it directly after symbol
+ reading, is because the cleanup protects us in case of errors, but is
+ discarded if symbol reading is successful. */
+
+#if 0
+/* FIXME: As free_named_symtabs is currently a big noop this function
+ is no longer needed. */
+static void
+clear_symtab_users_once PARAMS ((void));
+
+static int clear_symtab_users_queued;
+static int clear_symtab_users_done;
+
+static void
+clear_symtab_users_once ()
+{
+ /* Enforce once-per-`do_cleanups'-semantics */
+ if (clear_symtab_users_queued <= clear_symtab_users_done)
+ return;
+ clear_symtab_users_done = clear_symtab_users_queued;
+
+ clear_symtab_users ();
+}
+#endif
+
+/* Delete the specified psymtab, and any others that reference it. */
+
+static void
+cashier_psymtab (pst)
+ struct partial_symtab *pst;
+{
+ struct partial_symtab *ps, *pprev = NULL;
+ int i;
+
+ /* Find its previous psymtab in the chain */
+ for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
+ {
+ if (ps == pst)
+ break;
+ pprev = ps;
+ }
+
+ if (ps)
+ {
+ /* Unhook it from the chain. */
+ if (ps == pst->objfile->psymtabs)
+ pst->objfile->psymtabs = ps->next;
+ else
+ pprev->next = ps->next;
+
+ /* FIXME, we can't conveniently deallocate the entries in the
+ partial_symbol lists (global_psymbols/static_psymbols) that
+ this psymtab points to. These just take up space until all
+ the psymtabs are reclaimed. Ditto the dependencies list and
+ filename, which are all in the psymbol_obstack. */
+
+ /* We need to cashier any psymtab that has this one as a dependency... */
+ again:
+ for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
+ {
+ for (i = 0; i < ps->number_of_dependencies; i++)
+ {
+ if (ps->dependencies[i] == pst)
+ {
+ cashier_psymtab (ps);
+ goto again; /* Must restart, chain has been munged. */
+ }
+ }
+ }
+ }
+}
+
+/* If a symtab or psymtab for filename NAME is found, free it along
+ with any dependent breakpoints, displays, etc.
+ Used when loading new versions of object modules with the "add-file"
+ command. This is only called on the top-level symtab or psymtab's name;
+ it is not called for subsidiary files such as .h files.
+
+ Return value is 1 if we blew away the environment, 0 if not.
+ FIXME. The return valu appears to never be used.
+
+ FIXME. I think this is not the best way to do this. We should
+ work on being gentler to the environment while still cleaning up
+ all stray pointers into the freed symtab. */
+
+int
+free_named_symtabs (name)
+ char *name;
+{
+#if 0
+ /* FIXME: With the new method of each objfile having it's own
+ psymtab list, this function needs serious rethinking. In particular,
+ why was it ever necessary to toss psymtabs with specific compilation
+ unit filenames, as opposed to all psymtabs from a particular symbol
+ file? -- fnf
+ Well, the answer is that some systems permit reloading of particular
+ compilation units. We want to blow away any old info about these
+ compilation units, regardless of which objfiles they arrived in. --gnu. */
+
+ register struct symtab *s;
+ register struct symtab *prev;
+ register struct partial_symtab *ps;
+ struct blockvector *bv;
+ int blewit = 0;
+
+ /* We only wack things if the symbol-reload switch is set. */
+ if (!symbol_reloading)
+ return 0;
+
+ /* Some symbol formats have trouble providing file names... */
+ if (name == 0 || *name == '\0')
+ return 0;
+
+ /* Look for a psymtab with the specified name. */
+
+again2:
+ for (ps = partial_symtab_list; ps; ps = ps->next)
+ {
+ if (STREQ (name, ps->filename))
+ {
+ cashier_psymtab (ps); /* Blow it away...and its little dog, too. */
+ goto again2; /* Must restart, chain has been munged */
+ }
+ }
+
+ /* Look for a symtab with the specified name. */
+
+ for (s = symtab_list; s; s = s->next)
+ {
+ if (STREQ (name, s->filename))
+ break;
+ prev = s;
+ }
+
+ if (s)
+ {
+ if (s == symtab_list)
+ symtab_list = s->next;
+ else
+ prev->next = s->next;
+
+ /* For now, queue a delete for all breakpoints, displays, etc., whether
+ or not they depend on the symtab being freed. This should be
+ changed so that only those data structures affected are deleted. */
+
+ /* But don't delete anything if the symtab is empty.
+ This test is necessary due to a bug in "dbxread.c" that
+ causes empty symtabs to be created for N_SO symbols that
+ contain the pathname of the object file. (This problem
+ has been fixed in GDB 3.9x). */
+
+ bv = BLOCKVECTOR (s);
+ if (BLOCKVECTOR_NBLOCKS (bv) > 2
+ || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK))
+ || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)))
+ {
+ complain (&oldsyms_complaint, name);
+
+ clear_symtab_users_queued++;
+ make_cleanup (clear_symtab_users_once, 0);
+ blewit = 1;
+ }
+ else
+ {
+ complain (&empty_symtab_complaint, name);
+ }
+
+ free_symtab (s);
+ }
+ else
+ {
+ /* It is still possible that some breakpoints will be affected
+ even though no symtab was found, since the file might have
+ been compiled without debugging, and hence not be associated
+ with a symtab. In order to handle this correctly, we would need
+ to keep a list of text address ranges for undebuggable files.
+ For now, we do nothing, since this is a fairly obscure case. */
+ ;
+ }
+
+ /* FIXME, what about the minimal symbol table? */
+ return blewit;
+#else
+ return (0);
+#endif
+}
+\f
+/* Allocate and partially fill a partial symtab. It will be
+ completely filled at the end of the symbol list.
+
+ SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
+ is the address relative to which its symbols are (incremental) or 0
+ (normal). */
+
+
+struct partial_symtab *
+start_psymtab_common (objfile, section_offsets,
+ filename, textlow, global_syms, static_syms)
+ struct objfile *objfile;
+ struct section_offsets *section_offsets;
+ char *filename;
+ CORE_ADDR textlow;
+ struct partial_symbol **global_syms;
+ struct partial_symbol **static_syms;
+{
+ struct partial_symtab *psymtab;
+
+ psymtab = allocate_psymtab (filename, objfile);
+ psymtab->section_offsets = section_offsets;
+ psymtab->textlow = textlow;
+ psymtab->texthigh = psymtab->textlow; /* default */
+ psymtab->globals_offset = global_syms - objfile->global_psymbols.list;
+ psymtab->statics_offset = static_syms - objfile->static_psymbols.list;
+ return (psymtab);
+}
+\f
+/* Add a symbol with a long value to a psymtab.
+ Since one arg is a struct, we pass in a ptr and deref it (sigh). */
+
+void
+add_psymbol_to_list (name, namelength, namespace, class, list, val, coreaddr,
+ language, objfile)
+ char *name;
+ int namelength;
+ namespace_enum namespace;
+ enum address_class class;
+ struct psymbol_allocation_list *list;
+ long val; /* Value as a long */
+ CORE_ADDR coreaddr; /* Value as a CORE_ADDR */
+ enum language language;
+ struct objfile *objfile;
+{
+ register struct partial_symbol *psym;
+ char *buf = alloca (namelength + 1);
+ /* psymbol is static so that there will be no uninitialized gaps in the
+ structure which might contain random data, causing cache misses in
+ bcache. */
+ static struct partial_symbol psymbol;
+
+ /* Create local copy of the partial symbol */
+ memcpy (buf, name, namelength);
+ buf[namelength] = '\0';
+ SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache);
+ /* val and coreaddr are mutually exclusive, one of them *will* be zero */
+ if (val != 0)
+ {
+ SYMBOL_VALUE (&psymbol) = val;
+ }
+ else
+ {
+ SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
+ }
+ SYMBOL_SECTION (&psymbol) = 0;
+ SYMBOL_LANGUAGE (&psymbol) = language;
+ PSYMBOL_NAMESPACE (&psymbol) = namespace;
+ PSYMBOL_CLASS (&psymbol) = class;
+ SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
+
+ /* Stash the partial symbol away in the cache */
+ psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache);
+
+ /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
+ if (list->next >= list->list + list->size)
+ {
+ extend_psymbol_list (list, objfile);
+ }
+ *list->next++ = psym;
+ OBJSTAT (objfile, n_psyms++);
+}
+
+/* Add a symbol with a long value to a psymtab. This differs from
+ * add_psymbol_to_list above in taking both a mangled and a demangled
+ * name. */
+
+void
+add_psymbol_with_dem_name_to_list (name, namelength, dem_name, dem_namelength,
+ namespace, class, list, val, coreaddr, language, objfile)
+ char *name;
+ int namelength;
+ char *dem_name;
+ int dem_namelength;
+ namespace_enum namespace;
+ enum address_class class;
+ struct psymbol_allocation_list *list;
+ long val; /* Value as a long */
+ CORE_ADDR coreaddr; /* Value as a CORE_ADDR */
+ enum language language;
+ struct objfile *objfile;
+{
+ register struct partial_symbol *psym;
+ char *buf = alloca (namelength + 1);
+ /* psymbol is static so that there will be no uninitialized gaps in the
+ structure which might contain random data, causing cache misses in
+ bcache. */
+ static struct partial_symbol psymbol;
+
+ /* Create local copy of the partial symbol */
+
+ memcpy (buf, name, namelength);
+ buf[namelength] = '\0';
+ SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache);
+
+ buf = alloca (dem_namelength + 1);
+ memcpy (buf, dem_name, dem_namelength);
+ buf[dem_namelength] = '\0';
+
+ switch (language)
+ {
+ case language_c:
+ case language_cplus:
+ SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) =
+ bcache (buf, dem_namelength + 1, &objfile->psymbol_cache);
+ break;
+ case language_chill:
+ SYMBOL_CHILL_DEMANGLED_NAME (&psymbol) =
+ bcache (buf, dem_namelength + 1, &objfile->psymbol_cache);
+
+ /* FIXME What should be done for the default case? Ignoring for now. */
+ }
+
+ /* val and coreaddr are mutually exclusive, one of them *will* be zero */
+ if (val != 0)
+ {
+ SYMBOL_VALUE (&psymbol) = val;
+ }
+ else
+ {
+ SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
+ }
+ SYMBOL_SECTION (&psymbol) = 0;
+ SYMBOL_LANGUAGE (&psymbol) = language;
+ PSYMBOL_NAMESPACE (&psymbol) = namespace;
+ PSYMBOL_CLASS (&psymbol) = class;
+ SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
+
+ /* Stash the partial symbol away in the cache */
+ psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache);
+
+ /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
+ if (list->next >= list->list + list->size)
+ {
+ extend_psymbol_list (list, objfile);
+ }
+ *list->next++ = psym;
+ OBJSTAT (objfile, n_psyms++);
+}
+
+/* Initialize storage for partial symbols. */
+
+void
+init_psymbol_list (objfile, total_symbols)
+ struct objfile *objfile;
+ int total_symbols;
+{
+ /* Free any previously allocated psymbol lists. */
+
+ if (objfile->global_psymbols.list)
+ {
+ mfree (objfile->md, (PTR) objfile->global_psymbols.list);
+ }
+ if (objfile->static_psymbols.list)
+ {
+ mfree (objfile->md, (PTR) objfile->static_psymbols.list);
+ }
+
+ /* Current best guess is that approximately a twentieth
+ of the total symbols (in a debugging file) are global or static
+ oriented symbols */
+
+ objfile->global_psymbols.size = total_symbols / 10;
+ objfile->static_psymbols.size = total_symbols / 10;
+
+ if (objfile->global_psymbols.size > 0)
+ {
+ objfile->global_psymbols.next =
+ objfile->global_psymbols.list = (struct partial_symbol **)
+ xmmalloc (objfile->md, (objfile->global_psymbols.size
+ * sizeof (struct partial_symbol *)));
+ }
+ if (objfile->static_psymbols.size > 0)
+ {
+ objfile->static_psymbols.next =
+ objfile->static_psymbols.list = (struct partial_symbol **)
+ xmmalloc (objfile->md, (objfile->static_psymbols.size
+ * sizeof (struct partial_symbol *)));
}
- error ("I'm sorry, Dave, I can't do that. Symbol format unknown.");
}
-\f
-/* This function runs the load command of our current target. */
-void
-load_command (arg, from_tty)
- char *arg;
- int from_tty;
+/* OVERLAYS:
+ The following code implements an abstraction for debugging overlay sections.
+
+ The target model is as follows:
+ 1) The gnu linker will permit multiple sections to be mapped into the
+ same VMA, each with its own unique LMA (or load address).
+ 2) It is assumed that some runtime mechanism exists for mapping the
+ sections, one by one, from the load address into the VMA address.
+ 3) This code provides a mechanism for gdb to keep track of which
+ sections should be considered to be mapped from the VMA to the LMA.
+ This information is used for symbol lookup, and memory read/write.
+ For instance, if a section has been mapped then its contents
+ should be read from the VMA, otherwise from the LMA.
+
+ Two levels of debugger support for overlays are available. One is
+ "manual", in which the debugger relies on the user to tell it which
+ overlays are currently mapped. This level of support is
+ implemented entirely in the core debugger, and the information about
+ whether a section is mapped is kept in the objfile->obj_section table.
+
+ The second level of support is "automatic", and is only available if
+ the target-specific code provides functionality to read the target's
+ overlay mapping table, and translate its contents for the debugger
+ (by updating the mapped state information in the obj_section tables).
+
+ The interface is as follows:
+ User commands:
+ overlay map <name> -- tell gdb to consider this section mapped
+ overlay unmap <name> -- tell gdb to consider this section unmapped
+ overlay list -- list the sections that GDB thinks are mapped
+ overlay read-target -- get the target's state of what's mapped
+ overlay off/manual/auto -- set overlay debugging state
+ Functional interface:
+ find_pc_mapped_section(pc): if the pc is in the range of a mapped
+ section, return that section.
+ find_pc_overlay(pc): find any overlay section that contains
+ the pc, either in its VMA or its LMA
+ overlay_is_mapped(sect): true if overlay is marked as mapped
+ section_is_overlay(sect): true if section's VMA != LMA
+ pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
+ pc_in_unmapped_range(...): true if pc belongs to section's LMA
+ overlay_mapped_address(...): map an address from section's LMA to VMA
+ overlay_unmapped_address(...): map an address from section's VMA to LMA
+ symbol_overlayed_address(...): Return a "current" address for symbol:
+ either in VMA or LMA depending on whether
+ the symbol's section is currently mapped
+ */
+
+/* Overlay debugging state: */
+
+int overlay_debugging = 0; /* 0 == off, 1 == manual, -1 == auto */
+int overlay_cache_invalid = 0; /* True if need to refresh mapped state */
+
+/* Target vector for refreshing overlay mapped state */
+static void simple_overlay_update PARAMS ((struct obj_section *));
+void (*target_overlay_update) PARAMS ((struct obj_section *))
+= simple_overlay_update;
+
+/* Function: section_is_overlay (SECTION)
+ Returns true if SECTION has VMA not equal to LMA, ie.
+ SECTION is loaded at an address different from where it will "run". */
+
+int
+section_is_overlay (section)
+ asection *section;
+{
+ if (overlay_debugging)
+ if (section && section->lma != 0 &&
+ section->vma != section->lma)
+ return 1;
+
+ return 0;
+}
+
+/* Function: overlay_invalidate_all (void)
+ Invalidate the mapped state of all overlay sections (mark it as stale). */
+
+static void
+overlay_invalidate_all ()
+{
+ struct objfile *objfile;
+ struct obj_section *sect;
+
+ ALL_OBJSECTIONS (objfile, sect)
+ if (section_is_overlay (sect->the_bfd_section))
+ sect->ovly_mapped = -1;
+}
+
+/* Function: overlay_is_mapped (SECTION)
+ Returns true if section is an overlay, and is currently mapped.
+ Private: public access is thru function section_is_mapped.
+
+ Access to the ovly_mapped flag is restricted to this function, so
+ that we can do automatic update. If the global flag
+ OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
+ overlay_invalidate_all. If the mapped state of the particular
+ section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
+
+static int
+overlay_is_mapped (osect)
+ struct obj_section *osect;
{
- target_load (arg, from_tty);
+ if (osect == 0 || !section_is_overlay (osect->the_bfd_section))
+ return 0;
+
+ switch (overlay_debugging)
+ {
+ default:
+ case 0:
+ return 0; /* overlay debugging off */
+ case -1: /* overlay debugging automatic */
+ /* Unles there is a target_overlay_update function,
+ there's really nothing useful to do here (can't really go auto) */
+ if (target_overlay_update)
+ {
+ if (overlay_cache_invalid)
+ {
+ overlay_invalidate_all ();
+ overlay_cache_invalid = 0;
+ }
+ if (osect->ovly_mapped == -1)
+ (*target_overlay_update) (osect);
+ }
+ /* fall thru to manual case */
+ case 1: /* overlay debugging manual */
+ return osect->ovly_mapped == 1;
+ }
}
-/* This function runs the add_syms command of our current target. */
+/* Function: section_is_mapped
+ Returns true if section is an overlay, and is currently mapped. */
-void
-add_syms_command (args, from_tty)
- char *args;
- int from_tty;
+int
+section_is_mapped (section)
+ asection *section;
{
- target_add_syms (args, from_tty);
+ 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;
}
-/* This function allows the addition of incrementally linked object files. */
+/* Function: pc_in_unmapped_range
+ If PC falls into the lma range of SECTION, return true, else false. */
-void
-add_syms_addr_command (arg_string, from_tty)
- char* arg_string;
- int from_tty;
+CORE_ADDR
+pc_in_unmapped_range (pc, section)
+ CORE_ADDR pc;
+ asection *section;
{
- char *name;
- CORE_ADDR text_addr;
-
- if (arg_string == 0)
- error ("add-syms takes a file name and an address");
+ int size;
- arg_string = tilde_expand (arg_string);
- make_cleanup (free, arg_string);
+ 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;
+}
- for( ; *arg_string == ' '; arg_string++ );
- name = arg_string;
- for( ; *arg_string && *arg_string != ' ' ; arg_string++ );
- *arg_string++ = (char) 0;
+/* Function: pc_in_mapped_range
+ If PC falls into the vma range of SECTION, return true, else false. */
- if (name[0] == 0)
- error ("add-syms takes a file name and an address");
+CORE_ADDR
+pc_in_mapped_range (pc, section)
+ CORE_ADDR pc;
+ asection *section;
+{
+ int size;
- text_addr = parse_and_eval_address (arg_string);
+ 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;
+}
- dont_repeat ();
+/* Function: overlay_unmapped_address (PC, SECTION)
+ Returns the address corresponding to PC in the unmapped (load) range.
+ May be the same as PC. */
- if (!query ("add symbol table from file \"%s\" at text_addr = 0x%x\n",
- name, text_addr))
- error ("Not confirmed.");
+CORE_ADDR
+overlay_unmapped_address (pc, section)
+ CORE_ADDR pc;
+ asection *section;
+{
+ if (overlay_debugging)
+ if (section && section_is_overlay (section) &&
+ pc_in_mapped_range (pc, section))
+ return pc + section->lma - section->vma;
- symbol_file_add (name, 0, text_addr, 0);
+ return pc;
}
-\f
-/* Re-read symbols if the symbol-file has changed. */
-void
-reread_symbols ()
+
+/* Function: overlay_mapped_address (PC, SECTION)
+ Returns the address corresponding to PC in the mapped (runtime) range.
+ May be the same as PC. */
+
+CORE_ADDR
+overlay_mapped_address (pc, section)
+ CORE_ADDR pc;
+ asection *section;
{
- struct stat symstat;
+ if (overlay_debugging)
+ if (section && section_is_overlay (section) &&
+ pc_in_unmapped_range (pc, section))
+ return pc + section->vma - section->lma;
- /* 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
- */
+ return pc;
+}
- if (stat (symfile, &symstat) < 0)
- /* Can't read symbol-file. Assume it is up to date. */
- return;
- if (symstat.st_mtime > symfile_mtime)
+/* Function: symbol_overlayed_address
+ Return one of two addresses (relative to the VMA or to the LMA),
+ depending on whether the section is mapped or not. */
+
+CORE_ADDR
+symbol_overlayed_address (address, section)
+ CORE_ADDR address;
+ asection *section;
+{
+ if (overlay_debugging)
{
- printf_filtered ("Symbol file has changed; re-reading symbols.\n");
- symbol_file_command (symfile, 0);
- breakpoint_re_set ();
+ /* 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. */
-/* This function is really horrible, but to avoid it, there would need
- to be more filling in of forward references. */
-int
-fill_in_vptr_fieldno (type)
- struct type *type;
+asection *
+find_pc_overlay (pc)
+ CORE_ADDR pc;
{
- check_stub_type (type);
- if (TYPE_VPTR_FIELDNO (type) < 0)
- TYPE_VPTR_FIELDNO (type) =
- fill_in_vptr_fieldno (TYPE_BASECLASS (type, 1));
- return TYPE_VPTR_FIELDNO (type);
+ 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;
}
-\f
-/* Functions to handle complaints during symbol reading. */
-/* How many complaints about a particular thing should be printed before
- we stop whining about it? */
+/* 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. */
-static unsigned stop_whining = 1;
+asection *
+find_pc_mapped_section (pc)
+ CORE_ADDR pc;
+{
+ struct objfile *objfile;
+ struct obj_section *osect;
-/* Print a complaint about the input symbols, and link the complaint block
- into a chain for later handling. Result is 1 if the complaint was
- printed, 0 if it was suppressed. */
+ 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;
-int
-complain (complaint, val)
- struct complaint *complaint;
- char *val;
-{
- complaint->counter++;
- if (complaint->next == 0) {
- complaint->next = complaint_root->next;
- complaint_root->next = complaint;
- }
- if (complaint->counter > stop_whining)
- return 0;
- wrap_here ("");
- if (!info_verbose) {
- puts_filtered ("During symbol reading...");
- }
- printf_filtered (complaint->message, val);
- puts_filtered ("...");
- wrap_here("");
- if (!info_verbose)
- puts_filtered ("\n");
- return 1;
+ return NULL;
}
-/* Clear out all complaint counters that have ever been incremented. */
+/* Function: list_overlays_command
+ Print a list of mapped sections and their PC ranges */
void
-clear_complaints ()
+list_overlays_command (args, from_tty)
+ char *args;
+ int from_tty;
{
- struct complaint *p;
+ int nmapped = 0;
+ struct objfile *objfile;
+ struct obj_section *osect;
- for (p = complaint_root->next; p != complaint_root; p = p->next)
- p->counter = 0;
+ 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");
}
-\f
-/* 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.)
+/* Function: map_overlay_command
+ Mark the named section as mapped (ie. residing at its VMA address). */
- 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.
+void
+map_overlay_command (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ struct objfile *objfile, *objfile2;
+ struct obj_section *sec, *sec2;
+ asection *bfdsec;
- 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 (!overlay_debugging)
+ error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command.");
-static int clear_symtab_users_queued;
-static int clear_symtab_users_done;
+ if (args == 0 || *args == 0)
+ error ("Argument required: name of an overlay section");
+
+ /* First, find a section matching the user supplied argument */
+ ALL_OBJSECTIONS (objfile, sec)
+ if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
+ {
+ /* Now, check to see if the section is an overlay. */
+ bfdsec = sec->the_bfd_section;
+ if (!section_is_overlay (bfdsec))
+ continue; /* not an overlay section */
+
+ /* Mark the overlay as "mapped" */
+ sec->ovly_mapped = 1;
+
+ /* Next, make a pass and unmap any sections that are
+ overlapped by this new section: */
+ ALL_OBJSECTIONS (objfile2, sec2)
+ if (sec2->ovly_mapped &&
+ sec != sec2 &&
+ sec->the_bfd_section != sec2->the_bfd_section &&
+ (pc_in_mapped_range (sec2->addr, sec->the_bfd_section) ||
+ pc_in_mapped_range (sec2->endaddr, sec->the_bfd_section)))
+ {
+ if (info_verbose)
+ printf_filtered ("Note: section %s unmapped by overlap\n",
+ bfd_section_name (objfile->obfd,
+ sec2->the_bfd_section));
+ sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */
+ }
+ return;
+ }
+ error ("No overlay section called %s", args);
+}
+
+/* Function: unmap_overlay_command
+ Mark the overlay section as unmapped
+ (ie. resident in its LMA address range, rather than the VMA range). */
+
+void
+unmap_overlay_command (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ struct objfile *objfile;
+ struct obj_section *sec;
+
+ if (!overlay_debugging)
+ error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command.");
+
+ if (args == 0 || *args == 0)
+ error ("Argument required: name of an overlay section");
+
+ /* First, find a section matching the user supplied argument */
+ ALL_OBJSECTIONS (objfile, sec)
+ if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
+ {
+ if (!sec->ovly_mapped)
+ error ("Section %s is not mapped", args);
+ sec->ovly_mapped = 0;
+ return;
+ }
+ error ("No overlay section called %s", args);
+}
+
+/* Function: overlay_auto_command
+ A utility command to turn on overlay debugging.
+ Possibly this should be done via a set/show command. */
static void
-clear_symtab_users_once ()
+overlay_auto_command (args, from_tty)
+ char *args;
+ int from_tty;
{
- /* Enforce once-per-`do_cleanups'-semantics */
- if (clear_symtab_users_queued <= clear_symtab_users_done)
- return;
- clear_symtab_users_done = clear_symtab_users_queued;
+ overlay_debugging = -1;
+ if (info_verbose)
+ printf_filtered ("Automatic overlay debugging enabled.");
+}
- printf ("Resetting debugger state after updating old symbol tables\n");
+/* Function: overlay_manual_command
+ A utility command to turn on overlay debugging.
+ Possibly this should be done via a set/show command. */
- /* 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;
+static void
+overlay_manual_command (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ overlay_debugging = 1;
+ if (info_verbose)
+ printf_filtered ("Overlay debugging enabled.");
}
-/* Delete the specified psymtab, and any others that reference it. */
+/* Function: overlay_off_command
+ A utility command to turn on overlay debugging.
+ Possibly this should be done via a set/show command. */
-cashier_psymtab (pst)
- struct partial_symtab *pst;
+static void
+overlay_off_command (args, from_tty)
+ char *args;
+ int from_tty;
{
- struct partial_symtab *ps, *pprev;
- int i;
+ overlay_debugging = 0;
+ if (info_verbose)
+ printf_filtered ("Overlay debugging disabled.");
+}
- /* Find its previous psymtab in the chain */
- for (ps = partial_symtab_list; ps; ps = ps->next) {
- if (ps == pst)
- break;
- pprev = ps;
- }
+static void
+overlay_load_command (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ if (target_overlay_update)
+ (*target_overlay_update) (NULL);
+ else
+ error ("This target does not know how to read its overlay state.");
+}
- if (ps) {
- /* Unhook it from the chain. */
- if (ps == partial_symtab_list)
- partial_symtab_list = 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 = partial_symtab_list; 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. */
- }
- }
- }
- }
+/* Function: overlay_command
+ A place-holder for a mis-typed command */
+
+/* Command list chain containing all defined "overlay" subcommands. */
+struct cmd_list_element *overlaylist;
+
+static void
+overlay_command (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ printf_unfiltered
+ ("\"overlay\" must be followed by the name of an overlay command.\n");
+ help_list (overlaylist, "overlay ", -1, gdb_stdout);
}
-/* 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.
+/* 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)
- 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. */
+/* Throw away the cached copy of _ovly_table */
+static void
+simple_free_overlay_table ()
+{
+ if (cache_ovly_table)
+ free (cache_ovly_table);
+ cache_novlys = 0;
+ cache_ovly_table = NULL;
+ cache_ovly_table_base = 0;
+}
-int
-free_named_symtabs (name)
- char *name;
+#if 0
+/* Throw away the cached copy of _ovly_region_table */
+static void
+simple_free_overlay_region_table ()
{
- register struct symtab *s;
- register struct symtab *prev;
- register struct partial_symtab *ps;
- register struct partial_symtab *pprev;
- struct blockvector *bv;
- int blewit = 0;
+ if (cache_ovly_region_table)
+ free (cache_ovly_region_table);
+ cache_novly_regions = 0;
+ cache_ovly_region_table = NULL;
+ cache_ovly_region_table_base = 0;
+}
+#endif
- /* Look for a psymtab with the specified name. */
+/* Read an array of ints from the target into a local buffer.
+ Convert to host order. int LEN is number of ints */
+static void
+read_target_long_array (memaddr, myaddr, len)
+ CORE_ADDR memaddr;
+ unsigned int *myaddr;
+ int len;
+{
+ char *buf = alloca (len * TARGET_LONG_BYTES);
+ int i;
-again2:
- for (ps = partial_symtab_list; ps; ps = ps->next) {
- if (!strcmp (name, ps->filename)) {
- cashier_psymtab (ps); /* Blow it away...and its little dog, too. */
- goto again2; /* Must restart, chain has been munged */
- }
- }
+ 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);
+}
- /* Look for a symtab with the specified name. */
+/* Find and grab a copy of the target _ovly_table
+ (and _novlys, which is needed for the table's size) */
+static int
+simple_read_overlay_table ()
+{
+ struct minimal_symbol *msym;
- for (s = symtab_list; s; s = s->next)
+ simple_free_overlay_table ();
+ msym = lookup_minimal_symbol ("_novlys", 0, 0);
+ if (msym != NULL)
+ cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
+ else
+ return 0; /* failure */
+ cache_ovly_table = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table));
+ if (cache_ovly_table != NULL)
{
- if (!strcmp (name, s->filename))
- break;
- prev = s;
+ msym = lookup_minimal_symbol ("_ovly_table", 0, 0);
+ if (msym != NULL)
+ {
+ cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (msym);
+ read_target_long_array (cache_ovly_table_base,
+ (int *) cache_ovly_table,
+ cache_novlys * 4);
+ }
+ else
+ return 0; /* failure */
}
+ else
+ return 0; /* failure */
+ return 1; /* SUCCESS */
+}
- if (s)
+#if 0
+/* Find and grab a copy of the target _ovly_region_table
+ (and _novly_regions, which is needed for the table's size) */
+static int
+simple_read_overlay_region_table ()
+{
+ struct minimal_symbol *msym;
+
+ simple_free_overlay_region_table ();
+ msym = lookup_minimal_symbol ("_novly_regions", 0, 0);
+ if (msym != NULL)
+ cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
+ else
+ return 0; /* failure */
+ cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12);
+ if (cache_ovly_region_table != NULL)
{
- if (s == symtab_list)
- symtab_list = s->next;
+ msym = lookup_minimal_symbol ("_ovly_region_table", 0, 0);
+ if (msym != NULL)
+ {
+ cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym);
+ read_target_long_array (cache_ovly_region_table_base,
+ (int *) cache_ovly_region_table,
+ cache_novly_regions * 3);
+ }
else
- prev->next = s->next;
+ return 0; /* failure */
+ }
+ else
+ return 0; /* failure */
+ return 1; /* SUCCESS */
+}
+#endif
- /* 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. */
+/* 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. */
- /* 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). */
+static int
+simple_overlay_update_1 (osect)
+ struct obj_section *osect;
+{
+ int i, size;
- bv = BLOCKLIST (s);
- if (BLOCKLIST_NBLOCKS (bv) > 2
- || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK))
- || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)))
- {
- complain (&oldsyms_complaint, name);
+ size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
+ for (i = 0; i < cache_novlys; i++)
+ if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
+ cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
+ cache_ovly_table[i][SIZE] == size */ )
+ {
+ read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES,
+ (int *) cache_ovly_table[i], 4);
+ if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
+ cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
+ cache_ovly_table[i][SIZE] == size */ )
+ {
+ osect->ovly_mapped = cache_ovly_table[i][MAPPED];
+ return 1;
+ }
+ else /* Warning! Warning! Target's ovly table has changed! */
+ return 0;
+ }
+ return 0;
+}
- clear_symtab_users_queued++;
- make_cleanup (clear_symtab_users_once, 0);
- blewit = 1;
- } else {
- complain (&empty_symtab_complaint, name);
- }
+/* 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. */
- free_symtab (s);
+static void
+simple_overlay_update (osect)
+ struct obj_section *osect;
+{
+ struct objfile *objfile;
+
+ /* Were we given an osect to look up? NULL means do all of them. */
+ if (osect)
+ /* Have we got a cached copy of the target's overlay table? */
+ if (cache_ovly_table != NULL)
+ /* Does its cached location match what's currently in the symtab? */
+ if (cache_ovly_table_base ==
+ SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", 0, 0)))
+ /* Then go ahead and try to look up this single section in the cache */
+ if (simple_overlay_update_1 (osect))
+ /* Found it! We're done. */
+ return;
+
+ /* Cached table no good: need to read the entire table anew.
+ Or else we want all the sections, in which case it's actually
+ more efficient to read the whole table in one block anyway. */
+
+ if (simple_read_overlay_table () == 0) /* read failed? No table? */
+ {
+ warning ("Failed to read the target overlay mapping table.");
+ return;
+ }
+ /* Now may as well update all sections, even if only one was requested. */
+ ALL_OBJSECTIONS (objfile, osect)
+ if (section_is_overlay (osect->the_bfd_section))
+ {
+ int i, size;
+
+ size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
+ for (i = 0; i < cache_novlys; i++)
+ if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
+ cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
+ cache_ovly_table[i][SIZE] == size */ )
+ { /* obj_section matches i'th entry in ovly_table */
+ osect->ovly_mapped = cache_ovly_table[i][MAPPED];
+ break; /* finished with inner for loop: break out */
+ }
}
- 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 misc function vector? */
- return blewit;
}
-\f
+
+
void
_initialize_symfile ()
{
+ struct cmd_list_element *c;
- add_com ("symbol-file", class_files, symbol_file_command,
- "Load symbol table from executable file FILE.\n\
+ 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.");
-
- add_com ("add-syms", class_files, add_syms_command,
- "Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
-The second argument provides the starting address of the file's text.");
-
- add_com ("load", class_files, load_command,
- "Dynamically load FILE into the running program, and record its symbols\n\
-for access from GDB.");
+to execute.", &cmdlist);
+ c->completer = filename_completer;
+
+ c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command,
+ "Usage: add-symbol-file FILE ADDR\n\
+Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
+ADDR is the starting address of the file's text.",
+ &cmdlist);
+ c->completer = filename_completer;
+
+ c = add_cmd ("add-shared-symbol-files", class_files,
+ add_shared_symbol_files_command,
+ "Load the symbols from shared objects in the dynamic linker's link map.",
+ &cmdlist);
+ c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1,
+ &cmdlist);
+
+ c = add_cmd ("load", class_files, load_command,
+ "Dynamically load FILE into the running program, and record its symbols\n\
+for access from GDB.", &cmdlist);
+ c->completer = filename_completer;
add_show_from_set
- (add_set_cmd ("complaints", class_support, var_uinteger,
- (char *)&stop_whining,
- "Set max number of complaints about incorrect symbols.",
+ (add_set_cmd ("symbol-reloading", class_support, var_boolean,
+ (char *) &symbol_reloading,
+ "Set dynamic symbol table reloading multiple times in one run.",
&setlist),
&showlist);
- obstack_init (symbol_obstack);
- obstack_init (psymbol_obstack);
+ add_prefix_cmd ("overlay", class_support, overlay_command,
+ "Commands for debugging overlays.", &overlaylist,
+ "overlay ", 0, &cmdlist);
+
+ add_com_alias ("ovly", "overlay", class_alias, 1);
+ add_com_alias ("ov", "overlay", class_alias, 1);
+
+ add_cmd ("map-overlay", class_support, map_overlay_command,
+ "Assert that an overlay section is mapped.", &overlaylist);
+
+ add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
+ "Assert that an overlay section is unmapped.", &overlaylist);
+
+ add_cmd ("list-overlays", class_support, list_overlays_command,
+ "List mappings of overlay sections.", &overlaylist);
+
+ add_cmd ("manual", class_support, overlay_manual_command,
+ "Enable overlay debugging.", &overlaylist);
+ add_cmd ("off", class_support, overlay_off_command,
+ "Disable overlay debugging.", &overlaylist);
+ add_cmd ("auto", class_support, overlay_auto_command,
+ "Enable automatic overlay debugging.", &overlaylist);
+ add_cmd ("load-target", class_support, overlay_load_command,
+ "Read the overlay mapping state from the target.", &overlaylist);
+
+ /* Filename extension to source language lookup table: */
+ init_filename_language_table ();
+ c = add_set_cmd ("extension-language", class_files, var_string_noescape,
+ (char *) &ext_args,
+ "Set mapping between filename extension and source language.\n\
+Usage: set extension-language .foo bar",
+ &setlist);
+ c->function.cfunc = set_ext_lang_command;
+
+ add_info ("extensions", info_ext_lang_command,
+ "All filename extensions associated with a source language.");
}
projects / deliverable / binutils-gdb.git / blobdiff