[deliverable/binutils-gdb.git] / gdb / somread.c

/* Read HP PA/Risc object files for GDB.
   Copyright 1991, 1992, 1996 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., 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 "objfiles.h"
#include "buildsym.h"
#include "stabsread.h"
#include "gdb-stabs.h"
#include "complaints.h"
#include "gdb_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 *, 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 *));

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, struct objfile *objfile,
			      struct section_offsets *section_offsets)

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, objfile, section_offsets)
     bfd *abfd;
     struct objfile *objfile;
     struct section_offsets *section_offsets;
{
  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);
  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), 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), 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.");

  /* 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;
	      bufp->symbol_value += text_offset;
#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;
	      bufp->symbol_value += text_offset;
#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;
	      bufp->symbol_value += text_offset;
#ifdef SMASH_TEXT_ADDRESS
	      SMASH_TEXT_ADDRESS (bufp->symbol_value);
#endif
	      break;

	    case ST_DATA:
	      symname = bufp->name.n_strx + stringtab;
	      bufp->symbol_value += data_offset;
	      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;
	      bufp->symbol_value += text_offset;
#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 '$'. 

		 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] == '$')
		  || (symname[0] == 'D' && symname[1] == '$')
		  || (strncmp (symname, "$PIC", 4) == 0))
		continue;
	      break;

	    case ST_PRI_PROG:
	    case ST_SEC_PROG:
	    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
	      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;
	      bufp->symbol_value += text_offset;
#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;
	      bufp->symbol_value += text_offset;
#ifdef SMASH_TEXT_ADDRESS
	      SMASH_TEXT_ADDRESS (bufp->symbol_value);
#endif
	      break;


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

	    default:
	      continue;
	    }
	  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.  */
	case SS_UNSAT:
	  switch (bufp->symbol_type)
	    {
	      case ST_STORAGE:
		symname = bufp->name.n_strx + stringtab;
		bufp->symbol_value += data_offset;
		ms_type = mst_data;
		break;

	      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;

  init_minimal_symbol_collection ();
  back_to = make_cleanup (discard_minimal_symbols, 0);

  /* Process the normal SOM symbol table first. */

  som_symtab_read (abfd, objfile, section_offsets);

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

  /* Now read the native debug information.  */
  hpread_build_psymtabs (objfile, section_offsets, mainline);

  /* Install any minimal symbols that have been collected as the current
     minimal symbols for this objfile.  */
  install_minimal_symbols (objfile);

  /* Force hppa-tdep.c to re-read the unwind descriptors.  */
  objfile->obj_private = NULL;
  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);
    }
  hpread_symfile_finish (objfile);
}

/* SOM specific initialization routine for reading symbols.  */

static void
som_symfile_init (objfile)
     struct objfile *objfile;
{
  /* 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);
}

/* 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));

  /* 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;
}
\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	1	/* Read HP PA/Risc object files for GDB.
436d4143	2	Copyright 1991, 1992, 1996 Free Software Foundation, Inc.
bfe2f12b JL	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
6c9638b4	19	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
bfe2f12b JL	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"
2b576293	33	#include "gdb_string.h"
bfe2f12b JL	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
bb140953 JL	52	som_symtab_read PARAMS ((bfd , struct objfile ,
bb140953 JL	53	struct section_offsets *));
bfe2f12b	54
bfe2f12b JL	55	static struct section_offsets *
	56	som_symfile_offsets PARAMS ((struct objfile *, CORE_ADDR));
	57
	58	static void
	59	record_minimal_symbol PARAMS ((char *, CORE_ADDR,
	60	enum minimal_symbol_type,
	61	struct objfile *));
	62
	63	static void
	64	record_minimal_symbol (name, address, ms_type, objfile)
	65	char *name;
	66	CORE_ADDR address;
	67	enum minimal_symbol_type ms_type;
	68	struct objfile *objfile;
	69	{
	70	name = obsavestring (name, strlen (name), &objfile -> symbol_obstack);
	71	prim_record_minimal_symbol (name, address, ms_type, objfile);
	72	}
	73
	74	/*
	75
	76	LOCAL FUNCTION
	77
	78	som_symtab_read -- read the symbol table of a SOM file
	79
	80	SYNOPSIS
	81
bb140953 JL	82	void som_symtab_read (bfd abfd, struct objfile objfile,
bb140953 JL	83	struct section_offsets *section_offsets)
bfe2f12b JL	84
	85	DESCRIPTION
	86
	87	Given an open bfd, a base address to relocate symbols to, and a
	88	flag that specifies whether or not this bfd is for an executable
	89	or not (may be shared library for example), add all the global
	90	function and data symbols to the minimal symbol table.
	91	*/
	92
	93	static void
bb140953	94	som_symtab_read (abfd, objfile, section_offsets)
bfe2f12b	95	bfd *abfd;
bfe2f12b	96	struct objfile *objfile;
bb140953	97	struct section_offsets *section_offsets;
bfe2f12b JL	98	{
bfe2f12b JL	99	unsigned int number_of_symbols;
bfe2f12b JL	100	int val, dynamic;
	101	char *stringtab;
	102	asection *shlib_info;
	103	struct symbol_dictionary_record buf, bufp, *endbufp;
	104	char *symname;
	105	CONST int symsize = sizeof (struct symbol_dictionary_record);
506af7a7	106	CORE_ADDR text_offset, data_offset;
bb140953 JL	107
bb140953 JL	108
bb140953	109	text_offset = ANOFFSET (section_offsets, 0);
506af7a7	110	data_offset = ANOFFSET (section_offsets, 1);
bfe2f12b JL	111
	112	number_of_symbols = bfd_get_symcount (abfd);
	113
	114	buf = alloca (symsize * number_of_symbols);
987622b5	115	bfd_seek (abfd, obj_som_sym_filepos (abfd), SEEK_SET);
bfe2f12b JL	116	val = bfd_read (buf, symsize * number_of_symbols, 1, abfd);
	117	if (val != symsize * number_of_symbols)
	118	error ("Couldn't read symbol dictionary!");
	119
	120	stringtab = alloca (obj_som_stringtab_size (abfd));
987622b5	121	bfd_seek (abfd, obj_som_str_filepos (abfd), SEEK_SET);
bfe2f12b JL	122	val = bfd_read (stringtab, obj_som_stringtab_size (abfd), 1, abfd);
	123	if (val != obj_som_stringtab_size (abfd))
	124	error ("Can't read in HP string table.");
	125
	126	/* We need to determine if objfile is a dynamic executable (so we
	127	can do the right thing for ST_ENTRY vs ST_CODE symbols).
	128
	129	There's nothing in the header which easily allows us to do
	130	this. The only reliable way I know of is to check for the
	131	existance of a $SHLIB_INFO$ section with a non-zero size. */
	132	shlib_info = bfd_get_section_by_name (objfile->obfd, "$SHLIB_INFO$");
	133	if (shlib_info)
	134	dynamic = (bfd_section_size (objfile->obfd, shlib_info) != 0);
	135	else
	136	dynamic = 0;
	137
	138	endbufp = buf + number_of_symbols;
	139	for (bufp = buf; bufp < endbufp; ++bufp)
	140	{
	141	enum minimal_symbol_type ms_type;
	142
	143	QUIT;
	144
	145	switch (bufp->symbol_scope)
	146	{
	147	case SS_UNIVERSAL:
	148	case SS_EXTERNAL:
	149	switch (bufp->symbol_type)
	150	{
	151	case ST_SYM_EXT:
	152	case ST_ARG_EXT:
	153	continue;
	154
	155	case ST_CODE:
	156	case ST_PRI_PROG:
	157	case ST_SEC_PROG:
	158	case ST_MILLICODE:
	159	symname = bufp->name.n_strx + stringtab;
	160	ms_type = mst_text;
bb140953	161	bufp->symbol_value += text_offset;
bfe2f12b JL	162	#ifdef SMASH_TEXT_ADDRESS
	163	SMASH_TEXT_ADDRESS (bufp->symbol_value);
	164	#endif
	165	break;
	166
	167	case ST_ENTRY:
	168	symname = bufp->name.n_strx + stringtab;
	169	/* For a dynamic executable, ST_ENTRY symbols are
	170	the stubs, while the ST_CODE symbol is the real
	171	function. */
	172	if (dynamic)
	173	ms_type = mst_solib_trampoline;
	174	else
	175	ms_type = mst_text;
bb140953	176	bufp->symbol_value += text_offset;
bfe2f12b JL	177	#ifdef SMASH_TEXT_ADDRESS
	178	SMASH_TEXT_ADDRESS (bufp->symbol_value);
	179	#endif
	180	break;
	181
	182	case ST_STUB:
	183	symname = bufp->name.n_strx + stringtab;
	184	ms_type = mst_solib_trampoline;
bb140953	185	bufp->symbol_value += text_offset;
bfe2f12b JL	186	#ifdef SMASH_TEXT_ADDRESS
	187	SMASH_TEXT_ADDRESS (bufp->symbol_value);
	188	#endif
	189	break;
	190
	191	case ST_DATA:
	192	symname = bufp->name.n_strx + stringtab;
506af7a7	193	bufp->symbol_value += data_offset;
bfe2f12b JL	194	ms_type = mst_data;
	195	break;
	196	default:
	197	continue;
	198	}
	199	break;
	200
	201	#if 0
	202	/* SS_GLOBAL and SS_LOCAL are two names for the same thing (!). */
	203	case SS_GLOBAL:
	204	#endif
	205	case SS_LOCAL:
	206	switch (bufp->symbol_type)
	207	{
	208	case ST_SYM_EXT:
	209	case ST_ARG_EXT:
	210	continue;
	211
	212	case ST_CODE:
	213	symname = bufp->name.n_strx + stringtab;
	214	ms_type = mst_file_text;
bb140953	215	bufp->symbol_value += text_offset;
bfe2f12b JL	216	#ifdef SMASH_TEXT_ADDRESS
	217	SMASH_TEXT_ADDRESS (bufp->symbol_value);
	218	#endif
	219
	220	check_strange_names:
	221	/* Utah GCC 2.5, FSF GCC 2.6 and later generate correct local
	222	label prefixes for stabs, constant data, etc. So we need
	223	only filter out L$ symbols which are left in due to
	224	limitations in how GAS generates SOM relocations.
	225
	226	When linking in the HPUX C-library the HP linker has
	227	the nasty habit of placing section symbols from the literal
	228	subspaces in the middle of the program's text. Filter
	229	those out as best we can. Check for first and last character
2097152a JL	230	being '$'.
	231
	232	And finally, the newer HP compilers emit crud like $PIC_foo$N
	233	in some circumstance (PIC code I guess). It's also claimed
	234	that they emit D$ symbols too. What stupidity. */
bfe2f12b	235	if ((symname[0] == 'L' && symname[1] == '$')
2097152a JL	236	\|\| (symname[0] == '$' && symname[strlen(symname) - 1] == '$')
	237	\|\| (symname[0] == 'D' && symname[1] == '$')
	238	\|\| (strncmp (symname, "$PIC", 4) == 0))
bfe2f12b JL	239	continue;
	240	break;
	241
	242	case ST_PRI_PROG:
	243	case ST_SEC_PROG:
	244	case ST_MILLICODE:
	245	symname = bufp->name.n_strx + stringtab;
	246	ms_type = mst_file_text;
bb140953	247	bufp->symbol_value += text_offset;
bfe2f12b JL	248	#ifdef SMASH_TEXT_ADDRESS
	249	SMASH_TEXT_ADDRESS (bufp->symbol_value);
	250	#endif
	251	break;
	252
	253	case ST_ENTRY:
	254	symname = bufp->name.n_strx + stringtab;
	255	/* For a dynamic executable, ST_ENTRY symbols are
	256	the stubs, while the ST_CODE symbol is the real
	257	function. */
	258	if (dynamic)
	259	ms_type = mst_solib_trampoline;
	260	else
	261	ms_type = mst_file_text;
bb140953	262	bufp->symbol_value += text_offset;
bfe2f12b JL	263	#ifdef SMASH_TEXT_ADDRESS
	264	SMASH_TEXT_ADDRESS (bufp->symbol_value);
	265	#endif
	266	break;
	267
	268	case ST_STUB:
	269	symname = bufp->name.n_strx + stringtab;
	270	ms_type = mst_solib_trampoline;
bb140953	271	bufp->symbol_value += text_offset;
bfe2f12b JL	272	#ifdef SMASH_TEXT_ADDRESS
	273	SMASH_TEXT_ADDRESS (bufp->symbol_value);
	274	#endif
	275	break;
	276
	277
	278	case ST_DATA:
	279	symname = bufp->name.n_strx + stringtab;
506af7a7	280	bufp->symbol_value += data_offset;
bfe2f12b JL	281	ms_type = mst_file_data;
	282	goto check_strange_names;
	283
	284	default:
	285	continue;
	286	}
	287	break;
	288
5dc74605 JL	289	/* This can happen for common symbols when -E is passed to the
	290	final link. No idea _why_ that would make the linker force
	291	common symbols to have an SS_UNSAT scope, but it does. */
	292	case SS_UNSAT:
	293	switch (bufp->symbol_type)
	294	{
	295	case ST_STORAGE:
	296	symname = bufp->name.n_strx + stringtab;
	297	bufp->symbol_value += data_offset;
	298	ms_type = mst_data;
	299	break;
	300
	301	default:
	302	continue;
	303	}
	304	break;
	305
bfe2f12b JL	306	default:
	307	continue;
	308	}
	309
	310	if (bufp->name.n_strx > obj_som_stringtab_size (abfd))
	311	error ("Invalid symbol data; bad HP string table offset: %d",
	312	bufp->name.n_strx);
	313
	314	record_minimal_symbol (symname,
	315	bufp->symbol_value, ms_type,
	316	objfile);
	317	}
bfe2f12b JL	318	}
	319
	320	/* Scan and build partial symbols for a symbol file.
	321	We have been initialized by a call to som_symfile_init, which
	322	currently does nothing.
	323
	324	SECTION_OFFSETS is a set of offsets to apply to relocate the symbols
	325	in each section. This is ignored, as it isn't needed for SOM.
	326
	327	MAINLINE is true if we are reading the main symbol
	328	table (as opposed to a shared lib or dynamically loaded file).
	329
	330	This function only does the minimum work necessary for letting the
	331	user "name" things symbolically; it does not read the entire symtab.
	332	Instead, it reads the external and static symbols and puts them in partial
	333	symbol tables. When more extensive information is requested of a
	334	file, the corresponding partial symbol table is mutated into a full
	335	fledged symbol table by going back and reading the symbols
	336	for real.
	337
	338	We look for sections with specific names, to tell us what debug
	339	format to look for: FIXME!!!
	340
	341	somstab_build_psymtabs() handles STABS symbols.
	342
	343	Note that SOM files have a "minimal" symbol table, which is vaguely
	344	reminiscent of a COFF symbol table, but has only the minimal information
	345	necessary for linking. We process this also, and use the information to
	346	build gdb's minimal symbol table. This gives us some minimal debugging
	347	capability even for files compiled without -g. */
	348
	349	static void
	350	som_symfile_read (objfile, section_offsets, mainline)
	351	struct objfile *objfile;
	352	struct section_offsets *section_offsets;
	353	int mainline;
	354	{
	355	bfd *abfd = objfile->obfd;
	356	struct cleanup *back_to;
bfe2f12b JL	357
	358	init_minimal_symbol_collection ();
	359	back_to = make_cleanup (discard_minimal_symbols, 0);
	360
6a86fa48	361	/* Process the normal SOM symbol table first. */
bfe2f12b	362
bb140953	363	som_symtab_read (abfd, objfile, section_offsets);
bfe2f12b	364
98c0e047	365	/* Now read information from the stabs debug sections. */
6a86fa48 JL	366	stabsect_build_psymtabs (objfile, section_offsets, mainline,
6a86fa48 JL	367	"$GDB_SYMBOLS$", "$GDB_STRINGS$", "$TEXT$");
bfe2f12b	368
98c0e047 JL	369	/* Now read the native debug information. */
98c0e047 JL	370	hpread_build_psymtabs (objfile, section_offsets, mainline);
98c0e047	371
6a86fa48 JL	372	/* Install any minimal symbols that have been collected as the current
	373	minimal symbols for this objfile. */
	374	install_minimal_symbols (objfile);
bfe2f12b	375
31b2518a	376	/* Force hppa-tdep.c to re-read the unwind descriptors. */
c676d827	377	objfile->obj_private = NULL;
6a86fa48	378	do_cleanups (back_to);
bfe2f12b JL	379	}
	380
	381	/* Initialize anything that needs initializing when a completely new symbol
	382	file is specified (not just adding some symbols from another file, e.g. a
	383	shared library).
	384
	385	We reinitialize buildsym, since we may be reading stabs from a SOM file. */
	386
	387	static void
	388	som_new_init (ignore)
	389	struct objfile *ignore;
	390	{
	391	stabsread_new_init ();
	392	buildsym_new_init ();
	393	}
	394
	395	/* Perform any local cleanups required when we are done with a particular
	396	objfile. I.E, we are in the process of discarding all symbol information
	397	for an objfile, freeing up all memory held for it, and unlinking the
	398	objfile struct from the global list of known objfiles. */
	399
	400	static void
	401	som_symfile_finish (objfile)
	402	struct objfile *objfile;
	403	{
	404	if (objfile -> sym_stab_info != NULL)
	405	{
	406	mfree (objfile -> md, objfile -> sym_stab_info);
	407	}
98c0e047	408	hpread_symfile_finish (objfile);
bfe2f12b JL	409	}
bfe2f12b JL	410
436d4143	411	/* SOM specific initialization routine for reading symbols. */
bfe2f12b	412
bfe2f12b	413	static void
98c0e047 JL	414	som_symfile_init (objfile)
98c0e047 JL	415	struct objfile *objfile;
bfe2f12b	416	{
436d4143 JL	417	/* SOM objects may be reordered, so set OBJF_REORDERED. If we
	418	find this causes a significant slowdown in gdb then we could
	419	set it in the debug symbol readers only when necessary. */
	420	objfile->flags \|= OBJF_REORDERED;
98c0e047	421	hpread_symfile_init (objfile);
bfe2f12b JL	422	}
	423
	424	/* SOM specific parsing routine for section offsets.
	425
	426	Plain and simple for now. */
	427
	428	static struct section_offsets *
	429	som_symfile_offsets (objfile, addr)
	430	struct objfile *objfile;
	431	CORE_ADDR addr;
	432	{
	433	struct section_offsets *section_offsets;
	434	int i;
	435
	436	objfile->num_sections = SECT_OFF_MAX;
	437	section_offsets = (struct section_offsets *)
	438	obstack_alloc (&objfile -> psymbol_obstack,
	439	sizeof (struct section_offsets)
	440	+ sizeof (section_offsets->offsets) * (SECT_OFF_MAX-1));
	441
506af7a7 JL	442	/* First see if we're a shared library. If so, get the section
	443	offsets from the library, else get them from addr. */
	444	if (!som_solib_section_offsets (objfile, section_offsets))
	445	{
	446	for (i = 0; i < SECT_OFF_MAX; i++)
	447	ANOFFSET (section_offsets, i) = addr;
	448	}
bfe2f12b JL	449
	450	return section_offsets;
	451	}
	452	\f
	453	/* Register that we are able to handle SOM object file formats. */
	454
	455	static struct sym_fns som_sym_fns =
	456	{
	457	bfd_target_som_flavour,
	458	som_new_init, /* sym_new_init: init anything gbl to entire symtab */
	459	som_symfile_init, /* sym_init: read initial info, setup for sym_read() */
	460	som_symfile_read, /* sym_read: read a symbol file into symtab */
	461	som_symfile_finish, /* sym_finish: finished with file, cleanup */
	462	som_symfile_offsets, /* sym_offsets: Translate ext. to int. relocation */
	463	NULL /* next: pointer to next struct sym_fns */
	464	};
	465
	466	void
	467	_initialize_somread ()
	468	{
	469	add_symtab_fns (&som_sym_fns);
	470	}