There's nothing in the header which easily allows us to do
this. The only reliable way I know of is to check for the
existance of a $SHLIB_INFO$ section with a non-zero size. */
- shlib_info = bfd_get_section_by_name (objfile->obfd, "$SHLIB_INFO$");
- if (shlib_info)
- dynamic = (bfd_section_size (objfile->obfd, shlib_info) != 0);
- else
- dynamic = 0;
+ /* The code below is not a reliable way to check whether an
+ * executable is dynamic, so I commented it out - RT
+ * shlib_info = bfd_get_section_by_name (objfile->obfd, "$SHLIB_INFO$");
+ * if (shlib_info)
+ * dynamic = (bfd_section_size (objfile->obfd, shlib_info) != 0);
+ * else
+ * dynamic = 0;
+ */
+ /* I replaced the code with a simple check for text offset not being
+ * zero. Still not 100% reliable, but a more reliable way of asking
+ * "is this a dynamic executable?" than the above. RT
+ */
+ dynamic = (text_offset != 0);
endbufp = buf + number_of_symbols;
for (bufp = buf; bufp < endbufp; ++bufp)
/* This can happen for common symbols when -E is passed to the
final link. No idea _why_ that would make the linker force
- common symbols to have an SS_UNSAT scope, but it does. */
+ common symbols to have an SS_UNSAT scope, but it does.
+
+ This also happens for weak symbols, but their type is
+ ST_DATA. */
case SS_UNSAT:
switch (bufp->symbol_type)
{
case ST_STORAGE:
+ case ST_DATA:
symname = bufp->name.n_strx + stringtab;
bufp->symbol_value += data_offset;
ms_type = mst_data;
init_minimal_symbol_collection ();
back_to = make_cleanup (discard_minimal_symbols, 0);
- /* Process the normal SOM symbol table first. */
+ /* Read in the import list and the export list. Currently
+ the export list isn't used; the import list is used in
+ hp-symtab-read.c to handle static vars declared in other
+ shared libraries. */
+ init_import_symbols (objfile);
+#if 0 /* Export symbols not used today 1997-08-05 */
+ init_export_symbols (objfile);
+#else
+ objfile->export_list = NULL;
+ objfile->export_list_size = 0;
+#endif
+ /* Process the normal SOM symbol table first.
+ This reads in the DNTT and string table, but doesn't
+ actually scan the DNTT. It does scan the linker symbol
+ table and thus build up a "minimal symbol table". */
+
som_symtab_read (abfd, objfile, section_offsets);
- /* Now read information from the stabs debug sections. */
+ /* Now read information from the stabs debug sections.
+ This is a no-op for SOM.
+ Perhaps it is intended for some kind of mixed STABS/SOM
+ situation? */
stabsect_build_psymtabs (objfile, section_offsets, mainline,
"$GDB_SYMBOLS$", "$GDB_STRINGS$", "$TEXT$");
- /* Now read the native debug information. */
+ /* Now read the native debug information.
+ This builds the psymtab. This used to be done via a scan of
+ the DNTT, but is now done via the PXDB-built quick-lookup tables
+ together with a scan of the GNTT. See hp-psymtab-read.c. */
hpread_build_psymtabs (objfile, section_offsets, mainline);
/* Install any minimal symbols that have been collected as the current
- minimal symbols for this objfile. */
+ minimal symbols for this objfile.
+ Further symbol-reading is done incrementally, file-by-file,
+ in a step known as "psymtab-to-symtab" expansion. hp-symtab-read.c
+ contains the code to do the actual DNTT scanning and symtab building. */
install_minimal_symbols (objfile);
/* Force hppa-tdep.c to re-read the unwind descriptors. */
return section_offsets;
}
+
+
+
+/* Check if a given symbol NAME is in the import list
+ of OBJFILE.
+ 1 => true, 0 => false
+ This is used in hp_symtab_read.c to deal with static variables
+ that are defined in a different shared library than the one
+ whose symbols are being processed. */
+
+int is_in_import_list (name, objfile)
+ char * name;
+ struct objfile * objfile;
+{
+ register int i;
+
+ if (!objfile ||
+ !name ||
+ !*name)
+ return 0;
+
+ for (i=0; i < objfile->import_list_size; i++)
+ if (objfile->import_list[i] && STREQ (name, objfile->import_list[i]))
+ return 1;
+ return 0;
+}
+
+
+/* Read in and initialize the SOM import list which is present
+ for all executables and shared libraries. The import list
+ consists of the symbols that are referenced in OBJFILE but
+ not defined there. (Variables that are imported are dealt
+ with as "loc_indirect" vars.)
+ Return value = number of import symbols read in. */
+int
+init_import_symbols (objfile)
+ struct objfile * objfile;
+{
+ unsigned int import_list;
+ unsigned int import_list_size;
+ unsigned int string_table;
+ unsigned int string_table_size;
+ char * string_buffer;
+ register int i;
+ register int j;
+ register int k;
+ asection * text_section; /* section handle */
+ unsigned int dl_header[12]; /* SOM executable header */
+
+ /* A struct for an entry in the SOM import list */
+ typedef struct {
+ int name; /* index into the string table */
+ short dont_care1; /* we don't use this */
+ unsigned char type; /* 0 = NULL, 2 = Data, 3 = Code, 7 = Storage, 13 = Plabel */
+ unsigned int reserved2 : 8; /* not used */
+ } SomImportEntry;
+
+ /* We read 100 entries in at a time from the disk file. */
+# define SOM_READ_IMPORTS_NUM 100
+# define SOM_READ_IMPORTS_CHUNK_SIZE (sizeof (SomImportEntry) * SOM_READ_IMPORTS_NUM)
+ SomImportEntry buffer[SOM_READ_IMPORTS_NUM];
+
+ /* Initialize in case we error out */
+ objfile->import_list = NULL;
+ objfile->import_list_size = 0;
+
+#if 0 /* DEBUGGING */
+ printf ("Processing import list for %s\n", objfile->name);
+#endif
+
+ /* It doesn't work, for some reason, to read in space $TEXT$;
+ the subspace $SHLIB_INFO$ has to be used. Some BFD quirk? pai/1997-08-05 */
+ text_section = bfd_get_section_by_name (objfile->obfd, "$SHLIB_INFO$");
+ if (!text_section)
+ return 0;
+ /* Get the SOM executable header */
+ bfd_get_section_contents (objfile->obfd, text_section, dl_header, 0, 12 * sizeof (int));
+
+ /* Check header version number for 10.x HP-UX */
+ /* Currently we deal only with 10.x systems; on 9.x the version # is 89060912.
+ FIXME: Change for future HP-UX releases and mods to the SOM executable format */
+ if (dl_header[0] != 93092112)
+ return 0;
+
+ import_list = dl_header[4];
+ import_list_size = dl_header[5];
+ if (!import_list_size)
+ return 0;
+ string_table = dl_header[10];
+ string_table_size = dl_header[11];
+ if (!string_table_size)
+ return 0;
+
+ /* Suck in SOM string table */
+ string_buffer = (char *) xmalloc (string_table_size);
+ bfd_get_section_contents (objfile->obfd, text_section, string_buffer,
+ string_table, string_table_size);
+
+ /* Allocate import list in the psymbol obstack; this has nothing
+ to do with psymbols, just a matter of convenience. We want the
+ import list to be freed when the objfile is deallocated */
+ objfile->import_list
+ = (ImportEntry *) obstack_alloc (&objfile->psymbol_obstack,
+ import_list_size * sizeof (ImportEntry));
+
+ /* Read in the import entries, a bunch at a time */
+ for (j=0, k=0;
+ j < (import_list_size / SOM_READ_IMPORTS_NUM);
+ j++)
+ {
+ bfd_get_section_contents (objfile->obfd, text_section, buffer,
+ import_list + j * SOM_READ_IMPORTS_CHUNK_SIZE,
+ SOM_READ_IMPORTS_CHUNK_SIZE);
+ for (i=0; i < SOM_READ_IMPORTS_NUM; i++, k++)
+ {
+ if (buffer[i].type != (unsigned char) 0)
+ {
+ objfile->import_list[k]
+ = (char *) obstack_alloc (&objfile->psymbol_obstack, strlen (string_buffer + buffer[i].name) + 1);
+ strcpy (objfile->import_list[k], string_buffer + buffer[i].name);
+ /* Some day we might want to record the type and other information too */
+ }
+ else /* null type */
+ objfile->import_list[k] = NULL;
+
+#if 0 /* DEBUGGING */
+ printf ("Import String %d:%d (%d), type %d is %s\n", j, i, k,
+ (int) buffer[i].type, objfile->import_list[k]);
+#endif
+ }
+ }
+
+ /* Get the leftovers */
+ if (k < import_list_size)
+ bfd_get_section_contents (objfile->obfd, text_section, buffer,
+ import_list + k * sizeof (SomImportEntry),
+ (import_list_size - k) * sizeof (SomImportEntry));
+ for (i=0; k < import_list_size; i++, k++)
+ {
+ if (buffer[i].type != (unsigned char) 0)
+ {
+ objfile->import_list[k]
+ = (char *) obstack_alloc (&objfile->psymbol_obstack, strlen (string_buffer + buffer[i].name) + 1);
+ strcpy (objfile->import_list[k], string_buffer + buffer[i].name);
+ /* Some day we might want to record the type and other information too */
+ }
+ else
+ objfile->import_list[k] = NULL;
+#if 0 /* DEBUGGING */
+ printf ("Import String F:%d (%d), type %d, is %s\n", i, k,
+ (int) buffer[i].type, objfile->import_list[k]);
+#endif
+ }
+
+ objfile->import_list_size = import_list_size;
+ free (string_buffer);
+ return import_list_size;
+}
+
+/* Read in and initialize the SOM export list which is present
+ for all executables and shared libraries. The import list
+ consists of the symbols that are referenced in OBJFILE but
+ not defined there. (Variables that are imported are dealt
+ with as "loc_indirect" vars.)
+ Return value = number of import symbols read in. */
+int
+init_export_symbols (objfile)
+ struct objfile * objfile;
+{
+ unsigned int export_list;
+ unsigned int export_list_size;
+ unsigned int string_table;
+ unsigned int string_table_size;
+ char * string_buffer;
+ register int i;
+ register int j;
+ register int k;
+ asection * text_section; /* section handle */
+ unsigned int dl_header[12]; /* SOM executable header */
+
+ /* A struct for an entry in the SOM export list */
+ typedef struct {
+ int next; /* for hash table use -- we don't use this */
+ int name; /* index into string table */
+ int value; /* offset or plabel */
+ int dont_care1; /* not used */
+ unsigned char type; /* 0 = NULL, 2 = Data, 3 = Code, 7 = Storage, 13 = Plabel */
+ char dont_care2; /* not used */
+ short dont_care3; /* not used */
+ } SomExportEntry;
+
+ /* We read 100 entries in at a time from the disk file. */
+# define SOM_READ_EXPORTS_NUM 100
+# define SOM_READ_EXPORTS_CHUNK_SIZE (sizeof (SomExportEntry) * SOM_READ_EXPORTS_NUM)
+ SomExportEntry buffer[SOM_READ_EXPORTS_NUM];
+
+ /* Initialize in case we error out */
+ objfile->export_list = NULL;
+ objfile->export_list_size = 0;
+
+#if 0 /* DEBUGGING */
+ printf ("Processing export list for %s\n", objfile->name);
+#endif
+
+ /* It doesn't work, for some reason, to read in space $TEXT$;
+ the subspace $SHLIB_INFO$ has to be used. Some BFD quirk? pai/1997-08-05 */
+ text_section = bfd_get_section_by_name (objfile->obfd, "$SHLIB_INFO$");
+ if (!text_section)
+ return 0;
+ /* Get the SOM executable header */
+ bfd_get_section_contents (objfile->obfd, text_section, dl_header, 0, 12 * sizeof (int));
+
+ /* Check header version number for 10.x HP-UX */
+ /* Currently we deal only with 10.x systems; on 9.x the version # is 89060912.
+ FIXME: Change for future HP-UX releases and mods to the SOM executable format */
+ if (dl_header[0] != 93092112)
+ return 0;
+
+ export_list = dl_header[8];
+ export_list_size = dl_header[9];
+ if (!export_list_size)
+ return 0;
+ string_table = dl_header[10];
+ string_table_size = dl_header[11];
+ if (!string_table_size)
+ return 0;
+
+ /* Suck in SOM string table */
+ string_buffer = (char *) xmalloc (string_table_size);
+ bfd_get_section_contents (objfile->obfd, text_section, string_buffer,
+ string_table, string_table_size);
+
+ /* Allocate export list in the psymbol obstack; this has nothing
+ to do with psymbols, just a matter of convenience. We want the
+ export list to be freed when the objfile is deallocated */
+ objfile->export_list
+ = (ExportEntry *) obstack_alloc (&objfile->psymbol_obstack,
+ export_list_size * sizeof (ExportEntry));
+
+ /* Read in the export entries, a bunch at a time */
+ for (j=0, k=0;
+ j < (export_list_size / SOM_READ_EXPORTS_NUM);
+ j++)
+ {
+ bfd_get_section_contents (objfile->obfd, text_section, buffer,
+ export_list + j * SOM_READ_EXPORTS_CHUNK_SIZE,
+ SOM_READ_EXPORTS_CHUNK_SIZE);
+ for (i=0; i < SOM_READ_EXPORTS_NUM; i++, k++)
+ {
+ if (buffer[i].type != (unsigned char) 0)
+ {
+ objfile->export_list[k].name
+ = (char *) obstack_alloc (&objfile->psymbol_obstack, strlen (string_buffer + buffer[i].name) + 1);
+ strcpy (objfile->export_list[k].name, string_buffer + buffer[i].name);
+ objfile->export_list[k].address = buffer[i].value;
+ /* Some day we might want to record the type and other information too */
+ }
+ else /* null type */
+ {
+ objfile->export_list[k].name = NULL;
+ objfile->export_list[k].address = 0;
+ }
+#if 0 /* DEBUGGING */
+ printf ("Export String %d:%d (%d), type %d is %s\n", j, i, k,
+ (int) buffer[i].type, objfile->export_list[k].name);
+#endif
+ }
+ }
+
+ /* Get the leftovers */
+ if (k < export_list_size)
+ bfd_get_section_contents (objfile->obfd, text_section, buffer,
+ export_list + k * sizeof (SomExportEntry),
+ (export_list_size - k) * sizeof (SomExportEntry));
+ for (i=0; k < export_list_size; i++, k++)
+ {
+ if (buffer[i].type != (unsigned char) 0)
+ {
+ objfile->export_list[k].name
+ = (char *) obstack_alloc (&objfile->psymbol_obstack, strlen (string_buffer + buffer[i].name) + 1);
+ strcpy (objfile->export_list[k].name, string_buffer + buffer[i].name);
+ /* Some day we might want to record the type and other information too */
+ objfile->export_list[k].address = buffer[i].value;
+ }
+ else
+ {
+ objfile->export_list[k].name = NULL;
+ objfile->export_list[k].address = 0;
+ }
+#if 0 /* DEBUGGING */
+ printf ("Export String F:%d (%d), type %d, value %x is %s\n", i, k,
+ (int) buffer[i].type, buffer[i].value, objfile->export_list[k].name);
+#endif
+ }
+
+ objfile->export_list_size = export_list_size;
+ free (string_buffer);
+ return export_list_size;
+}
+
+
\f
/* Register that we are able to handle SOM object file formats. */
projects / deliverable / binutils-gdb.git / blobdiff