[binutils.git] / gdb / somread.c

/* Read HP PA/Risc object files for GDB.
   Copyright 1991, 1992 Free Software Foundation, Inc.
   Written by Fred Fish at Cygnus Support.

This file is part of GDB.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */

#include "defs.h"
#include "bfd.h"
#include "som.h"
#include "libhppa.h"
#include <syms.h>
#include "symtab.h"
#include "symfile.h"
#include "objfiles.h"
#include "buildsym.h"
#include "stabsread.h"
#include "gdb-stabs.h"
#include "complaints.h"
#include <string.h>
#include "demangle.h"
#include <sys/file.h>

/* Various things we might complain about... */

static void
som_symfile_init PARAMS ((struct objfile *));

static void
som_new_init PARAMS ((struct objfile *));

static void
som_symfile_read PARAMS ((struct objfile *, struct section_offsets *, int));

static void
som_symfile_finish PARAMS ((struct objfile *));

static void
som_symtab_read PARAMS ((bfd *,  CORE_ADDR, struct objfile *));

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 *));

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);
}

/*

LOCAL FUNCTION

	som_symtab_read -- read the symbol table of a SOM file

SYNOPSIS

	void som_symtab_read (bfd *abfd, CORE_ADDR addr,
			      struct objfile *objfile)

DESCRIPTION

	Given an open bfd, a base address to relocate symbols to, and a
	flag that specifies whether or not this bfd is for an executable
	or not (may be shared library for example), add all the global
	function and data symbols to the minimal symbol table.
*/

static void
som_symtab_read (abfd, addr, objfile)
     bfd *abfd;
     CORE_ADDR addr;
     struct objfile *objfile;
{
  unsigned int number_of_symbols;
  int val, dynamic;
  char *stringtab;
  asection *shlib_info;
  struct symbol_dictionary_record *buf, *bufp, *endbufp;
  char *symname;
  CONST int symsize = sizeof (struct symbol_dictionary_record);

  number_of_symbols = bfd_get_symcount (abfd);

  buf = alloca (symsize * number_of_symbols);
  bfd_seek (abfd, obj_som_sym_filepos (abfd), L_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);
  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.");

  /* We need to determine if objfile is a dynamic executable (so we
     can do the right thing for ST_ENTRY vs ST_CODE symbols).

     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;

  endbufp = buf + number_of_symbols;
  for (bufp = buf; bufp < endbufp; ++bufp)
    {
      enum minimal_symbol_type ms_type;

      QUIT;

      switch (bufp->symbol_scope)
	{
	case SS_UNIVERSAL:
	case SS_EXTERNAL:
	  switch (bufp->symbol_type)
	    {
	    case ST_SYM_EXT:
	    case ST_ARG_EXT:
	      continue;

	    case ST_CODE:
	    case ST_PRI_PROG:
	    case ST_SEC_PROG:
	    case ST_MILLICODE:
	      symname = bufp->name.n_strx + stringtab;
	      ms_type = mst_text;
#ifdef SMASH_TEXT_ADDRESS
	      SMASH_TEXT_ADDRESS (bufp->symbol_value);
#endif
	      break;

	    case ST_ENTRY:
	      symname = bufp->name.n_strx + stringtab;
	      /* For a dynamic executable, ST_ENTRY symbols are
		 the stubs, while the ST_CODE symbol is the real
		 function.  */
	      if (dynamic)
		ms_type = mst_solib_trampoline;
	      else
		ms_type = mst_text;
#ifdef SMASH_TEXT_ADDRESS
	      SMASH_TEXT_ADDRESS (bufp->symbol_value);
#endif
	      break;

	    case ST_STUB:
	      symname = bufp->name.n_strx + stringtab;
	      ms_type = mst_solib_trampoline;
#ifdef SMASH_TEXT_ADDRESS
	      SMASH_TEXT_ADDRESS (bufp->symbol_value);
#endif
	      break;

	    case ST_DATA:
	      symname = bufp->name.n_strx + stringtab;
	      ms_type = mst_data;
	      break;
	    default:
	      continue;
	    }
	  break;

#if 0
	  /* SS_GLOBAL and SS_LOCAL are two names for the same thing (!).  */
	case SS_GLOBAL:
#endif
	case SS_LOCAL:
	  switch (bufp->symbol_type)
	    {
	    case ST_SYM_EXT:
	    case ST_ARG_EXT:
	      continue;

	    case ST_CODE:
	      symname = bufp->name.n_strx + stringtab;
	      ms_type = mst_file_text;
#ifdef SMASH_TEXT_ADDRESS
	      SMASH_TEXT_ADDRESS (bufp->symbol_value);
#endif

	    check_strange_names:
	      /* Utah GCC 2.5, FSF GCC 2.6 and later generate correct local
		 label prefixes for stabs, constant data, etc.  So we need
		 only filter out L$ symbols which are left in due to
		 limitations in how GAS generates SOM relocations.

		 When linking in the HPUX C-library the HP linker has
		 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 '$'.  */
	      if ((symname[0] == 'L' && symname[1] == '$')
		  || (symname[0] == '$' && symname[strlen(symname) - 1] == '$'))
		continue;
	      break;

	    case ST_PRI_PROG:
	    case ST_SEC_PROG:
	    case ST_MILLICODE:
	      symname = bufp->name.n_strx + stringtab;
	      ms_type = mst_file_text;
#ifdef SMASH_TEXT_ADDRESS
	      SMASH_TEXT_ADDRESS (bufp->symbol_value);
#endif
	      break;

	    case ST_ENTRY:
	      symname = bufp->name.n_strx + stringtab;
	      /* For a dynamic executable, ST_ENTRY symbols are
		 the stubs, while the ST_CODE symbol is the real
		 function.  */
	      if (dynamic)
		ms_type = mst_solib_trampoline;
	      else
		ms_type = mst_file_text;
#ifdef SMASH_TEXT_ADDRESS
	      SMASH_TEXT_ADDRESS (bufp->symbol_value);
#endif
	      break;

	    case ST_STUB:
	      symname = bufp->name.n_strx + stringtab;
	      ms_type = mst_solib_trampoline;
#ifdef SMASH_TEXT_ADDRESS
	      SMASH_TEXT_ADDRESS (bufp->symbol_value);
#endif
	      break;


	    case ST_DATA:
	      symname = bufp->name.n_strx + stringtab;
	      ms_type = mst_file_data;
	      goto check_strange_names;

	    default:
	      continue;
	    }
	  break;

	default:
	  continue;
	}

      if (bufp->name.n_strx > obj_som_stringtab_size (abfd))
	error ("Invalid symbol data; bad HP string table offset: %d",
	       bufp->name.n_strx);

      record_minimal_symbol (symname,
			     bufp->symbol_value, ms_type, 
			     objfile);
    }
}

/* Scan and build partial symbols for a symbol file.
   We have been initialized by a call to som_symfile_init, which 
   currently does nothing.

   SECTION_OFFSETS is a set of offsets to apply to relocate the symbols
   in each section.  This is ignored, as it isn't needed for SOM.

   MAINLINE is true if we are reading the main symbol
   table (as opposed to a shared lib or dynamically loaded file).

   This function only does the minimum work necessary for letting the
   user "name" things symbolically; it does not read the entire symtab.
   Instead, it reads the external and static symbols and puts them in partial
   symbol tables.  When more extensive information is requested of a
   file, the corresponding partial symbol table is mutated into a full
   fledged symbol table by going back and reading the symbols
   for real.

   We look for sections with specific names, to tell us what debug
   format to look for:  FIXME!!!

   somstab_build_psymtabs() handles STABS symbols.

   Note that SOM files have a "minimal" symbol table, which is vaguely
   reminiscent of a COFF symbol table, but has only the minimal information
   necessary for linking.  We process this also, and use the information to
   build gdb's minimal symbol table.  This gives us some minimal debugging
   capability even for files compiled without -g.  */

static void
som_symfile_read (objfile, section_offsets, mainline)
     struct objfile *objfile;
     struct section_offsets *section_offsets;
     int mainline;
{
  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);

  /* Now read information from the stabs debug sections.  */
  stabsect_build_psymtabs (objfile, section_offsets, mainline,
			   "$GDB_SYMBOLS$", "$GDB_STRINGS$", "$TEXT$");

/* start-sanitize-hpread */
  /* Now read the native debug information.  */
  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.  */
  install_minimal_symbols (objfile);

  do_cleanups (back_to);
}

/* Initialize anything that needs initializing when a completely new symbol
   file is specified (not just adding some symbols from another file, e.g. a
   shared library).

   We reinitialize buildsym, since we may be reading stabs from a SOM file.  */

static void
som_new_init (ignore)
     struct objfile *ignore;
{
  stabsread_new_init ();
  buildsym_new_init ();
}

/* Perform any local cleanups required when we are done with a particular
   objfile.  I.E, we are in the process of discarding all symbol information
   for an objfile, freeing up all memory held for it, and unlinking the
   objfile struct from the global list of known objfiles. */

static void
som_symfile_finish (objfile)
     struct objfile *objfile;
{
  if (objfile -> sym_stab_info != NULL)
    {
      mfree (objfile -> md, objfile -> sym_stab_info);
    }
/* start-sanitize-hpread */
  hpread_symfile_finish (objfile);
/* end-sanitize-hpread */
}

/* 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 */
  hpread_symfile_init (objfile);
/* end-sanitize-hpread */
}

/* SOM specific parsing routine for section offsets.

   Plain and simple for now.  */

static struct section_offsets *
som_symfile_offsets (objfile, addr)
     struct objfile *objfile;
     CORE_ADDR addr;
{
  struct section_offsets *section_offsets;
  int i;

  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));

  for (i = 0; i < SECT_OFF_MAX; i++)
    ANOFFSET (section_offsets, i) = addr;

  return section_offsets;
}
\f
/* Register that we are able to handle SOM object file formats.  */

static struct sym_fns som_sym_fns =
{
  bfd_target_som_flavour,
  som_new_init,		/* sym_new_init: init anything gbl to entire symtab */
  som_symfile_init,	/* sym_init: read initial info, setup for sym_read() */
  som_symfile_read,	/* sym_read: read a symbol file into symtab */
  som_symfile_finish,	/* sym_finish: finished with file, cleanup */
  som_symfile_offsets,	/* sym_offsets:  Translate ext. to int. relocation */
  NULL			/* next: pointer to next struct sym_fns */
};

void
_initialize_somread ()
{
  add_symtab_fns (&som_sym_fns);
}
Commit	Line	Data
bfe2f12b JL	1	/* Read HP PA/Risc object files for GDB.
	2	Copyright 1991, 1992 Free Software Foundation, Inc.
	3	Written by Fred Fish at Cygnus Support.
	4
	5	This file is part of GDB.
	6
	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 2 of the License, or
	10	(at your option) any later version.
	11
	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
	18	along with this program; if not, write to the Free Software
	19	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
	20
	21	#include "defs.h"
	22	#include "bfd.h"
bfe2f12b JL	23	#include "som.h"
	24	#include "libhppa.h"
	25	#include <syms.h>
	26	#include "symtab.h"
	27	#include "symfile.h"
	28	#include "objfiles.h"
	29	#include "buildsym.h"
	30	#include "stabsread.h"
	31	#include "gdb-stabs.h"
	32	#include "complaints.h"
	33	#include <string.h>
	34	#include "demangle.h"
	35	#include <sys/file.h>
	36
bfe2f12b JL	37	/* Various things we might complain about... */
	38
	39	static void
6a86fa48	40	som_symfile_init PARAMS ((struct objfile *));
bfe2f12b JL	41
	42	static void
	43	som_new_init PARAMS ((struct objfile *));
	44
	45	static void
	46	som_symfile_read PARAMS ((struct objfile , struct section_offsets , int));
	47
	48	static void
	49	som_symfile_finish PARAMS ((struct objfile *));
	50
	51	static void
	52	som_symtab_read PARAMS ((bfd , CORE_ADDR, struct objfile ));
	53
bfe2f12b JL	54	static struct section_offsets *
	55	som_symfile_offsets PARAMS ((struct objfile *, CORE_ADDR));
	56
	57	static void
	58	record_minimal_symbol PARAMS ((char *, CORE_ADDR,
	59	enum minimal_symbol_type,
	60	struct objfile *));
	61
	62	static void
	63	record_minimal_symbol (name, address, ms_type, objfile)
	64	char *name;
	65	CORE_ADDR address;
	66	enum minimal_symbol_type ms_type;
	67	struct objfile *objfile;
	68	{
	69	name = obsavestring (name, strlen (name), &objfile -> symbol_obstack);
	70	prim_record_minimal_symbol (name, address, ms_type, objfile);
	71	}
	72
	73	/*
	74
	75	LOCAL FUNCTION
	76
	77	som_symtab_read -- read the symbol table of a SOM file
	78
	79	SYNOPSIS
	80
	81	void som_symtab_read (bfd *abfd, CORE_ADDR addr,
	82	struct objfile *objfile)
	83
	84	DESCRIPTION
	85
	86	Given an open bfd, a base address to relocate symbols to, and a
	87	flag that specifies whether or not this bfd is for an executable
	88	or not (may be shared library for example), add all the global
	89	function and data symbols to the minimal symbol table.
	90	*/
	91
	92	static void
	93	som_symtab_read (abfd, addr, objfile)
	94	bfd *abfd;
	95	CORE_ADDR addr;
	96	struct objfile *objfile;
	97	{
	98	unsigned int number_of_symbols;
bfe2f12b JL	99	int val, dynamic;
	100	char *stringtab;
	101	asection *shlib_info;
	102	struct symbol_dictionary_record buf, bufp, *endbufp;
	103	char *symname;
	104	CONST int symsize = sizeof (struct symbol_dictionary_record);
	105
	106	number_of_symbols = bfd_get_symcount (abfd);
	107
	108	buf = alloca (symsize * number_of_symbols);
	109	bfd_seek (abfd, obj_som_sym_filepos (abfd), L_SET);
	110	val = bfd_read (buf, symsize * number_of_symbols, 1, abfd);
	111	if (val != symsize * number_of_symbols)
	112	error ("Couldn't read symbol dictionary!");
	113
	114	stringtab = alloca (obj_som_stringtab_size (abfd));
	115	bfd_seek (abfd, obj_som_str_filepos (abfd), L_SET);
	116	val = bfd_read (stringtab, obj_som_stringtab_size (abfd), 1, abfd);
	117	if (val != obj_som_stringtab_size (abfd))
	118	error ("Can't read in HP string table.");
	119
	120	/* We need to determine if objfile is a dynamic executable (so we
	121	can do the right thing for ST_ENTRY vs ST_CODE symbols).
	122
	123	There's nothing in the header which easily allows us to do
	124	this. The only reliable way I know of is to check for the
	125	existance of a $SHLIB_INFO$ section with a non-zero size. */
	126	shlib_info = bfd_get_section_by_name (objfile->obfd, "$SHLIB_INFO$");
	127	if (shlib_info)
	128	dynamic = (bfd_section_size (objfile->obfd, shlib_info) != 0);
	129	else
	130	dynamic = 0;
	131
	132	endbufp = buf + number_of_symbols;
	133	for (bufp = buf; bufp < endbufp; ++bufp)
	134	{
	135	enum minimal_symbol_type ms_type;
	136
	137	QUIT;
	138
	139	switch (bufp->symbol_scope)
	140	{
	141	case SS_UNIVERSAL:
	142	case SS_EXTERNAL:
	143	switch (bufp->symbol_type)
	144	{
	145	case ST_SYM_EXT:
	146	case ST_ARG_EXT:
	147	continue;
	148
	149	case ST_CODE:
	150	case ST_PRI_PROG:
	151	case ST_SEC_PROG:
	152	case ST_MILLICODE:
	153	symname = bufp->name.n_strx + stringtab;
	154	ms_type = mst_text;
	155	#ifdef SMASH_TEXT_ADDRESS
	156	SMASH_TEXT_ADDRESS (bufp->symbol_value);
	157	#endif
	158	break;
	159
	160	case ST_ENTRY:
	161	symname = bufp->name.n_strx + stringtab;
	162	/* For a dynamic executable, ST_ENTRY symbols are
163	the stubs, while the ST_CODE symbol is the real
164	function. */
165	if (dynamic)
166	ms_type = mst_solib_trampoline;
167	else
168	ms_type = mst_text;
169	#ifdef SMASH_TEXT_ADDRESS
170	SMASH_TEXT_ADDRESS (bufp->symbol_value);
171	#endif
172	break;
173
174	case ST_STUB:
175	symname = bufp->name.n_strx + stringtab;
176	ms_type = mst_solib_trampoline;
177	#ifdef SMASH_TEXT_ADDRESS
178	SMASH_TEXT_ADDRESS (bufp->symbol_value);
179	#endif
180	break;
181
182	case ST_DATA:
183	symname = bufp->name.n_strx + stringtab;
184	ms_type = mst_data;
185	break;
186	default:
187	continue;
188	}
189	break;
190
191	#if 0
192	/* SS_GLOBAL and SS_LOCAL are two names for the same thing (!). */
193	case SS_GLOBAL:
194	#endif
195	case SS_LOCAL:
196	switch (bufp->symbol_type)
197	{
198	case ST_SYM_EXT:
199	case ST_ARG_EXT:
200	continue;
201
202	case ST_CODE:
203	symname = bufp->name.n_strx + stringtab;
204	ms_type = mst_file_text;
205	#ifdef SMASH_TEXT_ADDRESS
206	SMASH_TEXT_ADDRESS (bufp->symbol_value);
207	#endif
208
209	check_strange_names:
210	/* Utah GCC 2.5, FSF GCC 2.6 and later generate correct local
211	label prefixes for stabs, constant data, etc. So we need
212	only filter out L$ symbols which are left in due to
213	limitations in how GAS generates SOM relocations.
214
215	When linking in the HPUX C-library the HP linker has
216	the nasty habit of placing section symbols from the literal
217	subspaces in the middle of the program's text. Filter
218	those out as best we can. Check for first and last character
219	being '$'. */
220	if ((symname[0] == 'L' && symname[1] == '$')
221	\|\| (symname[0] == '$' && symname[strlen(symname) - 1] == '$'))
222	continue;
223	break;
224
225	case ST_PRI_PROG:
226	case ST_SEC_PROG:
227	case ST_MILLICODE:
228	symname = bufp->name.n_strx + stringtab;
229	ms_type = mst_file_text;
230	#ifdef SMASH_TEXT_ADDRESS
231	SMASH_TEXT_ADDRESS (bufp->symbol_value);
232	#endif
233	break;
234
235	case ST_ENTRY:
236	symname = bufp->name.n_strx + stringtab;
237	/* For a dynamic executable, ST_ENTRY symbols are
238	the stubs, while the ST_CODE symbol is the real
239	function. */
240	if (dynamic)
241	ms_type = mst_solib_trampoline;
242	else
243	ms_type = mst_file_text;
244	#ifdef SMASH_TEXT_ADDRESS
245	SMASH_TEXT_ADDRESS (bufp->symbol_value);
246	#endif
247	break;
248
249	case ST_STUB:
250	symname = bufp->name.n_strx + stringtab;
251	ms_type = mst_solib_trampoline;
252	#ifdef SMASH_TEXT_ADDRESS
253	SMASH_TEXT_ADDRESS (bufp->symbol_value);
254	#endif
255	break;
256
257
258	case ST_DATA:
259	symname = bufp->name.n_strx + stringtab;
260	ms_type = mst_file_data;
261	goto check_strange_names;
262
263	default:
264	continue;
265	}
266	break;
267
268	default:
269	continue;
270	}
271
272	if (bufp->name.n_strx > obj_som_stringtab_size (abfd))
273	error ("Invalid symbol data; bad HP string table offset: %d",
274	bufp->name.n_strx);
275
276	record_minimal_symbol (symname,
277	bufp->symbol_value, ms_type,
278	objfile);
279	}
bfe2f12b JL	280	}
	281
	282	/* Scan and build partial symbols for a symbol file.
	283	We have been initialized by a call to som_symfile_init, which
	284	currently does nothing.
	285
	286	SECTION_OFFSETS is a set of offsets to apply to relocate the symbols
	287	in each section. This is ignored, as it isn't needed for SOM.
	288
	289	MAINLINE is true if we are reading the main symbol
	290	table (as opposed to a shared lib or dynamically loaded file).
	291
	292	This function only does the minimum work necessary for letting the
	293	user "name" things symbolically; it does not read the entire symtab.
	294	Instead, it reads the external and static symbols and puts them in partial
	295	symbol tables. When more extensive information is requested of a
	296	file, the corresponding partial symbol table is mutated into a full
	297	fledged symbol table by going back and reading the symbols
	298	for real.
	299
	300	We look for sections with specific names, to tell us what debug
	301	format to look for: FIXME!!!
	302
	303	somstab_build_psymtabs() handles STABS symbols.
	304
	305	Note that SOM files have a "minimal" symbol table, which is vaguely
	306	reminiscent of a COFF symbol table, but has only the minimal information
	307	necessary for linking. We process this also, and use the information to
	308	build gdb's minimal symbol table. This gives us some minimal debugging
	309	capability even for files compiled without -g. */
	310
	311	static void
	312	som_symfile_read (objfile, section_offsets, mainline)
	313	struct objfile *objfile;
	314	struct section_offsets *section_offsets;
	315	int mainline;
	316	{
	317	bfd *abfd = objfile->obfd;
	318	struct cleanup *back_to;
	319	CORE_ADDR offset;
	320
	321	init_minimal_symbol_collection ();
	322	back_to = make_cleanup (discard_minimal_symbols, 0);
	323
bfe2f12b JL	324	/* FIXME, should take a section_offsets param, not just an offset. */
	325
	326	offset = ANOFFSET (section_offsets, 0);
bfe2f12b	327
6a86fa48	328	/* Process the normal SOM symbol table first. */
bfe2f12b	329
6a86fa48	330	som_symtab_read (abfd, offset, objfile);
bfe2f12b	331
98c0e047	332	/* Now read information from the stabs debug sections. */
6a86fa48 JL	333	stabsect_build_psymtabs (objfile, section_offsets, mainline,
6a86fa48 JL	334	"$GDB_SYMBOLS$", "$GDB_STRINGS$", "$TEXT$");
bfe2f12b	335
98c0e047 JL	336	/* start-sanitize-hpread */
	337	/* Now read the native debug information. */
	338	hpread_build_psymtabs (objfile, section_offsets, mainline);
	339	/* end-sanitize-hpread */
	340
6a86fa48 JL	341	/* Install any minimal symbols that have been collected as the current
	342	minimal symbols for this objfile. */
	343	install_minimal_symbols (objfile);
bfe2f12b	344
6a86fa48	345	do_cleanups (back_to);
bfe2f12b JL	346	}
	347
	348	/* Initialize anything that needs initializing when a completely new symbol
	349	file is specified (not just adding some symbols from another file, e.g. a
	350	shared library).
	351
	352	We reinitialize buildsym, since we may be reading stabs from a SOM file. */
	353
	354	static void
	355	som_new_init (ignore)
	356	struct objfile *ignore;
	357	{
	358	stabsread_new_init ();
	359	buildsym_new_init ();
	360	}
	361
	362	/* Perform any local cleanups required when we are done with a particular
	363	objfile. I.E, we are in the process of discarding all symbol information
	364	for an objfile, freeing up all memory held for it, and unlinking the
	365	objfile struct from the global list of known objfiles. */
	366
	367	static void
	368	som_symfile_finish (objfile)
	369	struct objfile *objfile;
	370	{
	371	if (objfile -> sym_stab_info != NULL)
	372	{
	373	mfree (objfile -> md, objfile -> sym_stab_info);
	374	}
98c0e047 JL	375	/* start-sanitize-hpread */
	376	hpread_symfile_finish (objfile);
	377	/* end-sanitize-hpread */
bfe2f12b JL	378	}
	379
	380	/* SOM specific initialization routine for reading symbols.
	381
6a86fa48	382	Nothing SOM specific left to do anymore. */
bfe2f12b	383	static void
98c0e047 JL	384	som_symfile_init (objfile)
98c0e047 JL	385	struct objfile *objfile;
bfe2f12b	386	{
98c0e047 JL	387	/* start-sanitize-hpread */
	388	hpread_symfile_init (objfile);
	389	/* end-sanitize-hpread */
bfe2f12b JL	390	}
	391
	392	/* SOM specific parsing routine for section offsets.
	393
	394	Plain and simple for now. */
	395
	396	static struct section_offsets *
	397	som_symfile_offsets (objfile, addr)
	398	struct objfile *objfile;
	399	CORE_ADDR addr;
	400	{
	401	struct section_offsets *section_offsets;
	402	int i;
	403
	404	objfile->num_sections = SECT_OFF_MAX;
	405	section_offsets = (struct section_offsets *)
	406	obstack_alloc (&objfile -> psymbol_obstack,
	407	sizeof (struct section_offsets)
	408	+ sizeof (section_offsets->offsets) * (SECT_OFF_MAX-1));
	409
	410	for (i = 0; i < SECT_OFF_MAX; i++)
	411	ANOFFSET (section_offsets, i) = addr;
	412
	413	return section_offsets;
	414	}
	415	\f
	416	/* Register that we are able to handle SOM object file formats. */
	417
	418	static struct sym_fns som_sym_fns =
	419	{
	420	bfd_target_som_flavour,
	421	som_new_init, /* sym_new_init: init anything gbl to entire symtab */
	422	som_symfile_init, /* sym_init: read initial info, setup for sym_read() */
	423	som_symfile_read, /* sym_read: read a symbol file into symtab */
	424	som_symfile_finish, /* sym_finish: finished with file, cleanup */
	425	som_symfile_offsets, /* sym_offsets: Translate ext. to int. relocation */
	426	NULL /* next: pointer to next struct sym_fns */
	427	};
	428
	429	void
	430	_initialize_somread ()
	431	{
	432	add_symtab_fns (&som_sym_fns);
	433	}