/* Read HP PA/Risc object files for GDB.
- Copyright 1991, 1992 Free Software Foundation, Inc.
+ Copyright 1991, 1992, 1996 Free Software Foundation, Inc.
Written by Fred Fish at Cygnus Support.
This file is part of GDB.
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "bfd.h"
-#include "som.h"
-#include "libhppa.h"
#include <syms.h>
#include "symtab.h"
#include "symfile.h"
#include "stabsread.h"
#include "gdb-stabs.h"
#include "complaints.h"
-#include <string.h>
+#include "gdb_string.h"
#include "demangle.h"
-#include <sys/file.h>
+#include "som.h"
+#include "libhppa.h"
/* Various things we might complain about... */
som_symfile_finish PARAMS ((struct objfile *));
static void
-som_symtab_read PARAMS ((bfd *, CORE_ADDR, struct objfile *));
+som_symtab_read PARAMS ((bfd *, struct objfile *,
+ struct section_offsets *));
static struct section_offsets *
som_symfile_offsets PARAMS ((struct objfile *, CORE_ADDR));
-static void
-record_minimal_symbol PARAMS ((char *, CORE_ADDR,
- enum minimal_symbol_type,
- struct objfile *));
+/* FIXME: These should really be in a common header somewhere */
-static void
-record_minimal_symbol (name, address, ms_type, objfile)
- char *name;
- CORE_ADDR address;
- enum minimal_symbol_type ms_type;
- struct objfile *objfile;
-{
- name = obsavestring (name, strlen (name), &objfile -> symbol_obstack);
- prim_record_minimal_symbol (name, address, ms_type, objfile);
-}
+extern void
+hpread_build_psymtabs PARAMS ((struct objfile *, struct section_offsets *, int));
+
+extern void
+hpread_symfile_finish PARAMS ((struct objfile *));
+
+extern void
+hpread_symfile_init PARAMS ((struct objfile *));
/*
SYNOPSIS
- void som_symtab_read (bfd *abfd, CORE_ADDR addr,
- struct objfile *objfile)
+ void som_symtab_read (bfd *abfd, struct objfile *objfile,
+ struct section_offsets *section_offsets)
DESCRIPTION
*/
static void
-som_symtab_read (abfd, addr, objfile)
+som_symtab_read (abfd, objfile, section_offsets)
bfd *abfd;
- CORE_ADDR addr;
struct objfile *objfile;
+ struct section_offsets *section_offsets;
{
unsigned int number_of_symbols;
int val, dynamic;
struct symbol_dictionary_record *buf, *bufp, *endbufp;
char *symname;
CONST int symsize = sizeof (struct symbol_dictionary_record);
+ CORE_ADDR text_offset, data_offset;
+
+
+ text_offset = ANOFFSET (section_offsets, 0);
+ data_offset = ANOFFSET (section_offsets, 1);
number_of_symbols = bfd_get_symcount (abfd);
buf = alloca (symsize * number_of_symbols);
- bfd_seek (abfd, obj_som_sym_filepos (abfd), L_SET);
+ bfd_seek (abfd, obj_som_sym_filepos (abfd), SEEK_SET);
val = bfd_read (buf, symsize * number_of_symbols, 1, abfd);
if (val != symsize * number_of_symbols)
error ("Couldn't read symbol dictionary!");
stringtab = alloca (obj_som_stringtab_size (abfd));
- bfd_seek (abfd, obj_som_str_filepos (abfd), L_SET);
+ bfd_seek (abfd, obj_som_str_filepos (abfd), SEEK_SET);
val = bfd_read (stringtab, obj_som_stringtab_size (abfd), 1, abfd);
if (val != obj_som_stringtab_size (abfd))
error ("Can't read in HP string table.");
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)
case ST_MILLICODE:
symname = bufp->name.n_strx + stringtab;
ms_type = mst_text;
+ bufp->symbol_value += text_offset;
#ifdef SMASH_TEXT_ADDRESS
SMASH_TEXT_ADDRESS (bufp->symbol_value);
#endif
ms_type = mst_solib_trampoline;
else
ms_type = mst_text;
+ bufp->symbol_value += text_offset;
#ifdef SMASH_TEXT_ADDRESS
SMASH_TEXT_ADDRESS (bufp->symbol_value);
#endif
case ST_STUB:
symname = bufp->name.n_strx + stringtab;
ms_type = mst_solib_trampoline;
+ bufp->symbol_value += text_offset;
#ifdef SMASH_TEXT_ADDRESS
SMASH_TEXT_ADDRESS (bufp->symbol_value);
#endif
case ST_DATA:
symname = bufp->name.n_strx + stringtab;
+ bufp->symbol_value += data_offset;
ms_type = mst_data;
break;
default:
case ST_CODE:
symname = bufp->name.n_strx + stringtab;
ms_type = mst_file_text;
+ bufp->symbol_value += text_offset;
#ifdef SMASH_TEXT_ADDRESS
SMASH_TEXT_ADDRESS (bufp->symbol_value);
#endif
the nasty habit of placing section symbols from the literal
subspaces in the middle of the program's text. Filter
those out as best we can. Check for first and last character
- being '$'. */
+ being '$'.
+
+ And finally, the newer HP compilers emit crud like $PIC_foo$N
+ in some circumstance (PIC code I guess). It's also claimed
+ that they emit D$ symbols too. What stupidity. */
if ((symname[0] == 'L' && symname[1] == '$')
- || (symname[0] == '$' && symname[strlen(symname) - 1] == '$'))
+ || (symname[0] == '$' && symname[strlen(symname) - 1] == '$')
+ || (symname[0] == 'D' && symname[1] == '$')
+ || (strncmp (symname, "$PIC", 4) == 0))
continue;
break;
case ST_MILLICODE:
symname = bufp->name.n_strx + stringtab;
ms_type = mst_file_text;
+ bufp->symbol_value += text_offset;
#ifdef SMASH_TEXT_ADDRESS
SMASH_TEXT_ADDRESS (bufp->symbol_value);
#endif
ms_type = mst_solib_trampoline;
else
ms_type = mst_file_text;
+ bufp->symbol_value += text_offset;
#ifdef SMASH_TEXT_ADDRESS
SMASH_TEXT_ADDRESS (bufp->symbol_value);
#endif
case ST_STUB:
symname = bufp->name.n_strx + stringtab;
ms_type = mst_solib_trampoline;
+ bufp->symbol_value += text_offset;
#ifdef SMASH_TEXT_ADDRESS
SMASH_TEXT_ADDRESS (bufp->symbol_value);
#endif
case ST_DATA:
symname = bufp->name.n_strx + stringtab;
+ bufp->symbol_value += data_offset;
ms_type = mst_file_data;
goto check_strange_names;
}
break;
+ /* 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.
+
+ 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;
+ break;
+
+ default:
+ continue;
+ }
+ break;
+
default:
continue;
}
error ("Invalid symbol data; bad HP string table offset: %d",
bufp->name.n_strx);
- record_minimal_symbol (symname,
- bufp->symbol_value, ms_type,
- objfile);
+ prim_record_minimal_symbol (symname, bufp->symbol_value, ms_type,
+ objfile);
}
}
{
bfd *abfd = objfile->obfd;
struct cleanup *back_to;
- CORE_ADDR offset;
init_minimal_symbol_collection ();
back_to = make_cleanup (discard_minimal_symbols, 0);
- /* FIXME, should take a section_offsets param, not just an offset. */
-
- offset = ANOFFSET (section_offsets, 0);
-
- /* Process the normal SOM symbol table first. */
-
- som_symtab_read (abfd, offset, objfile);
+ /* 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
- /* Now read information from the stabs debug sections. */
+ /* 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.
+ 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$");
-/* start-sanitize-hpread */
- /* 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);
-/* end-sanitize-hpread */
/* 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. */
- OBJ_UNWIND_INFO (objfile) = NULL;
+ objfile->obj_private = NULL;
do_cleanups (back_to);
}
{
mfree (objfile -> md, objfile -> sym_stab_info);
}
-/* start-sanitize-hpread */
hpread_symfile_finish (objfile);
-/* end-sanitize-hpread */
}
-/* SOM specific initialization routine for reading symbols.
+/* SOM specific initialization routine for reading symbols. */
- Nothing SOM specific left to do anymore. */
static void
som_symfile_init (objfile)
struct objfile *objfile;
{
-/* start-sanitize-hpread */
+ /* SOM objects may be reordered, so set OBJF_REORDERED. If we
+ find this causes a significant slowdown in gdb then we could
+ set it in the debug symbol readers only when necessary. */
+ objfile->flags |= OBJF_REORDERED;
hpread_symfile_init (objfile);
-/* end-sanitize-hpread */
}
/* SOM specific parsing routine for section offsets.
objfile->num_sections = SECT_OFF_MAX;
section_offsets = (struct section_offsets *)
- obstack_alloc (&objfile -> psymbol_obstack,
- sizeof (struct section_offsets)
- + sizeof (section_offsets->offsets) * (SECT_OFF_MAX-1));
+ obstack_alloc (&objfile -> psymbol_obstack, SIZEOF_SECTION_OFFSETS);
- for (i = 0; i < SECT_OFF_MAX; i++)
- ANOFFSET (section_offsets, i) = addr;
+ /* First see if we're a shared library. If so, get the section
+ offsets from the library, else get them from addr. */
+ if (!som_solib_section_offsets (objfile, section_offsets))
+ {
+ for (i = 0; i < SECT_OFF_MAX; i++)
+ ANOFFSET (section_offsets, i) = addr;
+ }
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