/* Generic symbol file reading for the GNU debugger, GDB.
- Copyright 1990, 1991, 1992 Free Software Foundation, Inc.
+ Copyright 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
Contributed by Cygnus Support, using pieces from other GDB modules.
This file is part of GDB.
#include "objfiles.h"
#include "gdbcmd.h"
#include "breakpoint.h"
+#include "language.h"
+#include "complaints.h"
+#include "demangle.h"
#include <obstack.h>
#include <assert.h>
#include <fcntl.h>
#include <string.h>
#include <sys/stat.h>
+#include <ctype.h>
+
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
/* 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;
/* Functions this file defines */
+static void
+set_initial_language PARAMS ((void));
+
static void
load_command PARAMS ((char *, int));
static void
find_sym_fns PARAMS ((struct objfile *));
-static void
+void
clear_symtab_users_once PARAMS ((void));
/* List of all available sym_fns. On gdb startup, each object file reader
int symbol_reloading = 0;
#endif
-/* Structure to manage complaints about symbol file contents. */
-
-struct complaint complaint_root[1] = {
- {(char *) 0, 0, complaint_root},
-};
-
-/* Some actual complaints. */
-
-struct complaint oldsyms_complaint = {
- "Replacing old symbols for `%s'", 0, 0 };
-
-struct complaint empty_symtab_complaint = {
- "Empty symbol table found for `%s'", 0, 0 };
-
\f
/* In the following sort, we always make sure that
register debug symbol declarations always come before regular
if (namediff != 0) return namediff;
/* If they match, compare the rest of the names. */
- namediff = strcmp (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2));
+ namediff = STRCMP (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2));
if (namediff != 0) return namediff;
/* For symbols of the same name, registers should come first. */
}
else
{
- return (strcmp (st1 + 2, st2 + 2));
+ return (STRCMP (st1 + 2, st2 + 2));
}
}
}
}
+/* Remember the lowest-addressed loadable section we've seen.
+ This function is called via bfd_map_over_sections. */
+
+#if 0 /* Not used yet */
+static void
+find_lowest_section (abfd, sect, obj)
+ bfd *abfd;
+ asection *sect;
+ PTR obj;
+{
+ asection **lowest = (asection **)obj;
+
+ if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD))
+ return;
+ if (!*lowest)
+ *lowest = sect; /* First loadable section */
+ else if (bfd_section_vma (abfd, *lowest) >= bfd_section_vma (abfd, sect))
+ *lowest = sect; /* A lower loadable section */
+}
+#endif
+
/* Process a symbol file, as either the main file or as a dynamically
loaded file.
int mainline;
int verbo;
{
- asection *text_sect;
-
- /* 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).
-
- FIXME: This strategy works correctly when the debugging symbols are
- intermixed with "normal" symbols. However, when the debugging symbols
- are separate, such as with ELF/DWARF, it is perfectly plausible for
- the symbol table to be missing but still have all the DWARF info
- intact. Thus in general it is wrong to assume that having no symbol
- table implies no debugging information. */
-
- if (!(bfd_get_file_flags (objfile -> obfd) & HAS_SYMS))
- return;
+ struct section_offsets *section_offsets;
+ asection *lowest_sect;
init_entry_point_info (objfile);
find_sym_fns (objfile);
}
(*objfile -> sf -> sym_new_init) (objfile);
+ }
- /* For mainline, caller didn't know the specified address of the
- text section. We fix that here. */
+ /* 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 the ".text"
+ segment. */
+
+ if (mainline)
+ {
+ addr = 0; /* No offset from objfile addresses. */
+ }
+ else
+ {
+ lowest_sect = bfd_get_section_by_name (objfile->obfd, ".text");
+#if 0
+ lowest_sect = 0;
+ bfd_map_over_sections (objfile->obfd, find_lowest_section,
+ (PTR) &lowest_sect);
+#endif
- text_sect = bfd_get_section_by_name (objfile -> obfd, ".text");
- addr = bfd_section_vma (objfile -> obfd, text_sect);
+ if (lowest_sect == 0)
+ warning ("no loadable sections found in added symbol-file %s",
+ objfile->name);
+ else if (0 == bfd_get_section_name (objfile->obfd, lowest_sect)
+ || !STREQ (".text",
+ bfd_get_section_name (objfile->obfd, lowest_sect)))
+ warning ("Lowest section in %s is %s at 0x%x",
+ objfile->name,
+ bfd_section_name (objfile->obfd, lowest_sect),
+ bfd_section_vma (objfile->obfd, lowest_sect));
+
+ if (lowest_sect)
+ addr -= bfd_section_vma (objfile->obfd, lowest_sect);
}
/* Initialize symbol reading routines for this objfile, allow complaints to
(*objfile -> sf -> sym_init) (objfile);
clear_complaints (1, verbo);
- (*objfile -> sf -> sym_read) (objfile, addr, mainline);
+
+ /* If objfile->sf->sym_offsets doesn't set this, we don't care
+ (currently). */
+ objfile->num_sections = 0; /* krp-FIXME: why zero? */
+ section_offsets = (*objfile -> sf -> sym_offsets) (objfile, addr);
+ objfile->section_offsets = section_offsets;
+
+#ifndef IBM6000_TARGET
+ /* This is a SVR4/SunOS specific hack, I think. In any event, it
+ screws RS/6000. sym_offsets should be doing this sort of thing,
+ because it knows the mapping between bfd sections and
+ section_offsets. */
+ /* This is a hack. As far as I can tell, section offsets are not
+ target dependent. They are all set to addr with a couple of
+ exceptions. The exceptions are sysvr4 shared libraries, whose
+ offsets are kept in solib structures anyway and rs6000 xcoff
+ which handles shared libraries in a completely unique way.
+
+ Section offsets are built similarly, except that they are built
+ by adding addr in all cases because there is no clear mapping
+ from section_offsets into actual sections. Note that solib.c
+ has a different algorythm for finding section offsets.
+
+ These should probably all be collapsed into some target
+ independent form of shared library support. FIXME. */
+
+ if (addr)
+ {
+ struct obj_section *s;
+
+ for (s = objfile->sections; s < objfile->sections_end; ++s)
+ {
+ s->addr -= s->offset;
+ s->addr += addr;
+ s->endaddr -= s->offset;
+ s->endaddr += addr;
+ s->offset += addr;
+ }
+ }
+#endif /* not IBM6000_TARGET */
+
+ (*objfile -> sf -> sym_read) (objfile, section_offsets, mainline);
/* Don't allow char * to have a typename (else would get caddr_t.) */
/* Ditto void *. FIXME should do this for all the builtin types. */
TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0;
TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0;
+ /* Mark the objfile has having had initial symbol read attempted. Note
+ that this does not mean we found any symbols... */
+
+ objfile -> flags |= OBJF_SYMS;
+}
+
+/* Perform required actions immediately after either reading in the initial
+ symbols for a new objfile, or mapping in the symbols from a reusable
+ objfile. */
+
+void
+new_symfile_objfile (objfile, mainline, verbo)
+ struct objfile *objfile;
+ int mainline;
+ int verbo;
+{
if (mainline)
{
/* OK, make it the "real" symbol file. */
struct partial_symtab *psymtab;
bfd *abfd;
- /* Open a bfd for the file and then check to see if the file has a
- symbol table. 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 the symbol table (we read the file
- and end up with a mostly empty symbol table, but with lots of stuff in
- the minimal symbol table). We need to make the decision about whether
- to continue with the file before allocating and building a objfile.
-
- FIXME: This strategy works correctly when the debugging symbols are
- intermixed with "normal" symbols. However, when the debugging symbols
- are separate, such as with ELF/DWARF, it is perfectly plausible for
- the symbol table to be missing but still have all the DWARF info
- intact. Thus in general it is wrong to assume that having no symbol
- table implies no debugging information. */
+ /* Open a bfd for the file, and give user a chance to burp if we'd be
+ interactively wiping out any existing symbols. */
abfd = symfile_bfd_open (name);
- if (!(bfd_get_file_flags (abfd) & HAS_SYMS))
- {
- error ("%s has no symbol-table", name);
- }
if ((have_full_symbols () || have_partial_symbols ())
&& mainline
&& !query ("Load new symbol table from \"%s\"? ", name))
error ("Not confirmed.");
+ /* Getting new symbols may change our opinion about what is
+ frameless. */
+
+ reinit_frame_cache ();
+
objfile = allocate_objfile (abfd, mapped);
/* If the objfile uses a mapped symbol file, and we have a psymtab for
wrap_here ("");
fflush (stdout);
}
+ init_entry_point_info (objfile);
+ find_sym_fns (objfile);
}
else
{
fflush (stdout);
}
syms_from_objfile (objfile, addr, mainline, from_tty);
- objfile -> flags |= OBJF_SYMS;
}
+ new_symfile_objfile (objfile, 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
psymtab != NULL;
psymtab = psymtab -> next)
{
- (void) psymtab_to_symtab (psymtab);
+ psymtab_to_symtab (psymtab);
}
}
error ("Not confirmed.");
free_all_objfiles ();
symfile_objfile = NULL;
+ current_source_symtab = NULL;
+ current_source_line = 0;
+ if (from_tty)
+ {
+ printf ("No symbol file now.\n");
+ }
}
else
{
cleanups = make_cleanup (freeargv, (char *) argv);
while (*argv != NULL)
{
- if (strcmp (*argv, "-mapped") == 0)
+ if (STREQ (*argv, "-mapped"))
{
mapped = 1;
}
- else if (strcmp (*argv, "-readnow") == 0)
+ else if (STREQ (*argv, "-readnow"))
{
readnow = 1;
}
}
else
{
- /* Getting new symbols may change our opinion about what is
- frameless. */
- reinit_frame_cache ();
- (void) symbol_file_add (name, from_tty, (CORE_ADDR)0, 1,
- mapped, readnow);
+ symbol_file_add (name, from_tty, (CORE_ADDR)0, 1, mapped, readnow);
+ set_initial_language ();
}
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).
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, 0, &absolute_name);
+ desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name);
if (desc < 0)
{
make_cleanup (free, 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, NULL, desc);
if (!sym_bfd)
error ("\"%s\": can't open to read symbols: %s.", name,
bfd_errmsg (bfd_error));
}
+ sym_bfd->cacheable = true;
if (!bfd_check_format (sym_bfd, bfd_object))
{
{
name = arg;
}
- else if (strcmp (arg, "-mapped") == 0)
+ else if (STREQ (arg, "-mapped"))
{
mapped = 1;
}
- else if (strcmp (arg, "-readnow") == 0)
+ else if (STREQ (arg, "-readnow"))
{
readnow = 1;
}
name, local_hex_string (text_addr)))
error ("Not confirmed.");
- /* Getting new symbols may change our opinion about what is
- frameless. */
-
- reinit_frame_cache ();
-
- (void) symbol_file_add (name, 0, text_addr, 0, mapped, readnow);
+ symbol_file_add (name, 0, text_addr, 0, mapped, readnow);
}
\f
/* Re-read symbols if a symbol-file has changed. */
if (reread_one)
breakpoint_re_set ();
}
-\f
-/* Functions to handle complaints during symbol reading. */
-
-/* How many complaints about a particular thing should be printed before
- we stop whining about it? Default is no whining at all, since so many
- systems have ill-constructed symbol files. */
-
-static unsigned stop_whining = 0;
-
-/* Should each complaint be self explanatory, or should we assume that
- a series of complaints is being produced?
- case 0: self explanatory message.
- case 1: First message of a series that must start off with explanation.
- case 2: Subsequent message, when user already knows we are reading
- symbols and we can just state our piece. */
-
-static int complaint_series = 0;
-
-/* Print a complaint about the input symbols, and link the complaint block
- into a chain for later handling. */
-
-void
-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;
- wrap_here ("");
-
- switch (complaint_series + (info_verbose << 1)) {
-
- /* Isolated messages, must be self-explanatory. */
- case 0:
- puts_filtered ("During symbol reading, ");
- wrap_here("");
- printf_filtered (complaint->message, val);
- puts_filtered (".\n");
- break;
-
- /* First of a series, without `set verbose'. */
- case 1:
- puts_filtered ("During symbol reading...");
- printf_filtered (complaint->message, val);
- puts_filtered ("...");
- wrap_here("");
- complaint_series++;
- break;
-
- /* Subsequent messages of a series, or messages under `set verbose'.
- (We'll already have produced a "Reading in symbols for XXX..." message
- and will clean up at the end with a newline.) */
- default:
- printf_filtered (complaint->message, val);
- puts_filtered ("...");
- wrap_here("");
- }
-}
-
-/* Clear out all complaint counters that have ever been incremented.
- If sym_reading is 1, be less verbose about successive complaints,
- since the messages are appearing all together during a command that
- reads symbols (rather than scattered around as psymtabs get fleshed
- out into symtabs at random times). If noisy is 1, we are in a
- noisy symbol reading command, and our caller will print enough
- context for the user to figure it out. */
-
-void
-clear_complaints (sym_reading, noisy)
- int sym_reading;
- int noisy;
-{
- struct complaint *p;
-
- for (p = complaint_root->next; p != complaint_root; p = p->next)
- p->counter = 0;
-
- if (!sym_reading && !noisy && complaint_series > 1) {
- /* Terminate previous series, since caller won't. */
- puts_filtered ("\n");
- }
- complaint_series = sym_reading? 1 + noisy: 0;
-}
\f
enum language
deduce_language_from_filename (filename)
char *filename;
{
- char *c = strrchr (filename, '.');
+ char *c;
- if (!c) ; /* Get default. */
- else if(!strcmp(c,".mod"))
- return language_m2;
- else if(!strcmp(c,".c"))
- return language_c;
- else if(!strcmp(c,".cc") || !strcmp(c,".C"))
- return language_cplus;
+ if (0 == filename)
+ ; /* Get default */
+ else if (0 == (c = strrchr (filename, '.')))
+ ; /* Get default. */
+ else if(STREQ(c,".mod"))
+ return language_m2;
+ else if(STREQ(c,".c"))
+ return language_c;
+ else if(STREQ(c,".cc") || STREQ(c,".C"))
+ return language_cplus;
+ else if(STREQ(c,".ch") || STREQ(c,".c186") || STREQ(c,".c286"))
+ return language_chill;
return language_unknown; /* default */
}
symtab = (struct symtab *)
obstack_alloc (&objfile -> symbol_obstack, sizeof (struct symtab));
- (void) memset (symtab, 0, sizeof (*symtab));
+ memset (symtab, 0, sizeof (*symtab));
symtab -> filename = obsavestring (filename, strlen (filename),
&objfile -> symbol_obstack);
symtab -> fullname = NULL;
obstack_alloc (&objfile -> psymbol_obstack,
sizeof (struct partial_symtab));
- (void) memset (psymtab, 0, sizeof (struct partial_symtab));
+ memset (psymtab, 0, sizeof (struct partial_symtab));
psymtab -> filename = obsavestring (filename, strlen (filename),
&objfile -> psymbol_obstack);
psymtab -> symtab = NULL;
static int clear_symtab_users_queued;
static int clear_symtab_users_done;
-static void
+void
clear_symtab_users_once ()
{
/* Enforce once-per-`do_cleanups'-semantics */
again2:
for (ps = partial_symtab_list; ps; ps = ps->next) {
- if (!strcmp (name, ps->filename)) {
+ if (STREQ (name, ps->filename)) {
cashier_psymtab (ps); /* Blow it away...and its little dog, too. */
goto again2; /* Must restart, chain has been munged */
}
for (s = symtab_list; s; s = s->next)
{
- if (!strcmp (name, s->filename))
+ if (STREQ (name, s->filename))
break;
prev = s;
}
struct partial_symtab *
-start_psymtab_common (objfile, addr,
+start_psymtab_common (objfile, section_offsets,
filename, textlow, global_syms, static_syms)
struct objfile *objfile;
- CORE_ADDR addr;
+ struct section_offsets *section_offsets;
char *filename;
CORE_ADDR textlow;
struct partial_symbol *global_syms;
struct partial_symtab *psymtab;
psymtab = allocate_psymtab (filename, objfile);
- psymtab -> addr = addr;
+ 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
+/* Debugging versions of functions that are usually inline macros
+ (see symfile.h). */
+
+#if !INLINE_ADD_PSYMBOL
+
+/* 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, language,
+ objfile)
+ char *name;
+ int namelength;
+ enum namespace namespace;
+ enum address_class class;
+ struct psymbol_allocation_list *list;
+ long val;
+ enum language language;
+ struct objfile *objfile;
+{
+ register struct partial_symbol *psym;
+ register char *demangled_name;
+
+ if (list->next >= list->list + list->size)
+ {
+ extend_psymbol_list (list,objfile);
+ }
+ psym = list->next++;
+
+ SYMBOL_NAME (psym) =
+ (char *) obstack_alloc (&objfile->psymbol_obstack, namelength + 1);
+ memcpy (SYMBOL_NAME (psym), name, namelength);
+ SYMBOL_NAME (psym)[namelength] = '\0';
+ SYMBOL_VALUE (psym) = val;
+ SYMBOL_LANGUAGE (psym) = language;
+ PSYMBOL_NAMESPACE (psym) = namespace;
+ PSYMBOL_CLASS (psym) = class;
+ SYMBOL_INIT_DEMANGLED_NAME (psym, &objfile->psymbol_obstack);
+}
+
+/* Add a symbol with a CORE_ADDR value to a psymtab. */
+
+void
+add_psymbol_addr_to_list (name, namelength, namespace, class, list, val,
+ language, objfile)
+ char *name;
+ int namelength;
+ enum namespace namespace;
+ enum address_class class;
+ struct psymbol_allocation_list *list;
+ CORE_ADDR val;
+ enum language language;
+ struct objfile *objfile;
+{
+ register struct partial_symbol *psym;
+ register char *demangled_name;
+
+ if (list->next >= list->list + list->size)
+ {
+ extend_psymbol_list (list,objfile);
+ }
+ psym = list->next++;
+
+ SYMBOL_NAME (psym) =
+ (char *) obstack_alloc (&objfile->psymbol_obstack, namelength + 1);
+ memcpy (SYMBOL_NAME (psym), name, namelength);
+ SYMBOL_NAME (psym)[namelength] = '\0';
+ SYMBOL_VALUE_ADDRESS (psym) = val;
+ SYMBOL_LANGUAGE (psym) = language;
+ PSYMBOL_NAMESPACE (psym) = namespace;
+ PSYMBOL_CLASS (psym) = class;
+ SYMBOL_INIT_DEMANGLED_NAME (psym, &objfile->psymbol_obstack);
+}
+
+#endif /* !INLINE_ADD_PSYMBOL */
\f
void
"Dynamically load FILE into the running program, and record its symbols\n\
for access from GDB.");
- add_show_from_set
- (add_set_cmd ("complaints", class_support, var_zinteger,
- (char *)&stop_whining,
- "Set max number of complaints about incorrect symbols.",
- &setlist),
- &showlist);
-
add_show_from_set
(add_set_cmd ("symbol-reloading", class_support, var_boolean,
(char *)&symbol_reloading,
projects / deliverable / binutils-gdb.git / blobdiff