--- /dev/null
+/* 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. */
+
+/************************************************************************
+ * *
+ * NOTICE *
+ * *
+ * This file is still under construction. When it is complete, this *
+ * notice will be removed. Until then, direct any questions or changes *
+ * to Fred Fish at Cygnus Support (fnf@cygnus.com) *
+ * *
+ * FIXME Still needs support for shared libraries. *
+ * FIXME Still needs support for core files. *
+ * FIXME The ".debug" and ".line" section names are hardwired. *
+ * *
+ ************************************************************************/
+
+#include "defs.h"
+#include "bfd.h"
+#include "libbfd.h"
+#include "libhppa.h"
+#include <syms.h>
+#include "symtab.h"
+#include "symfile.h"
+#include "objfiles.h"
+#include "buildsym.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
+pa_symfile_init PARAMS ((struct objfile *));
+
+static void
+pa_new_init PARAMS ((struct objfile *));
+
+static void
+pa_symfile_read PARAMS ((struct objfile *, struct section_offsets *, int));
+
+static void
+pa_symfile_finish PARAMS ((struct objfile *));
+
+static void
+pa_symtab_read PARAMS ((bfd *, CORE_ADDR, struct objfile *));
+
+static void
+free_painfo PARAMS ((PTR));
+
+static struct section_offsets *
+pa_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);
+}
+
+/*
+
+LOCAL FUNCTION
+
+ pa_symtab_read -- read the symbol table of a PA file
+
+SYNOPSIS
+
+ void pa_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
+pa_symtab_read (abfd, addr, objfile)
+ bfd *abfd;
+ CORE_ADDR addr;
+ struct objfile *objfile;
+{
+ unsigned int number_of_symbols;
+ unsigned int i;
+ int val;
+ char *stringtab;
+ struct symbol_dictionary_record *buf, *bufp;
+
+ number_of_symbols = obj_hp_sym_count (abfd);
+
+ buf = alloca (obj_hp_symbol_entry_size (abfd) * number_of_symbols);
+ bfd_seek (abfd, obj_hp_sym_filepos (abfd), L_SET);
+ val = bfd_read (buf, obj_hp_symbol_entry_size (abfd) * number_of_symbols,
+ 1, abfd);
+ if (val != obj_hp_symbol_entry_size (abfd) * number_of_symbols)
+ error ("Couldn't read symbol dictionary!");
+
+ stringtab = alloca (obj_hp_stringtab_size (abfd));
+ bfd_seek (abfd, obj_hp_str_filepos (abfd), L_SET);
+ val = bfd_read (stringtab, obj_hp_stringtab_size (abfd), 1, abfd);
+ if (val != obj_hp_stringtab_size (abfd))
+ error ("Can't read in HP string table.");
+
+ for (i = 0, bufp = buf; i < number_of_symbols; i++, bufp++)
+ {
+ enum minimal_symbol_type ms_type;
+
+ QUIT;
+
+ if (bufp->symbol_scope != SS_UNIVERSAL)
+ continue;
+
+ 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_ENTRY:
+ case ST_MILLICODE:
+ ms_type = mst_text;
+ bufp->symbol_value &= ~0x3; /* clear out permission bits */
+ break;
+ case ST_DATA:
+ ms_type = mst_data;
+ break;
+ default:
+ continue;
+ }
+
+ if (bufp->name.n_strx > obj_hp_stringtab_size (abfd))
+ error ("Invalid symbol data; bad HP string table offset: %d",
+ bufp->name.n_strx);
+
+ record_minimal_symbol (bufp->name.n_strx + stringtab,
+ bufp->symbol_value, ms_type,
+ objfile);
+ }
+
+ install_minimal_symbols (objfile);
+}
+
+/* Scan and build partial symbols for a symbol file.
+ We have been initialized by a call to pa_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 the PA.
+
+ 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!!!
+
+ pastab_build_psymtabs() handles STABS symbols.
+
+ Note that PA 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
+pa_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);
+
+ make_cleanup (free_painfo, (PTR) objfile);
+
+ /* Process the normal PA symbol table first. */
+
+ /* FIXME, should take a section_offsets param, not just an offset. */
+
+ offset = ANOFFSET (section_offsets, 0);
+ pa_symtab_read (abfd, offset, objfile);
+
+ /* Now process debugging information, which is contained in
+ special PA sections. */
+
+ pastab_build_psymtabs (objfile, section_offsets, mainline);
+
+ do_cleanups (back_to);
+}
+
+/* This cleans up the objfile's sym_private pointer, and the chain of
+ stab_section_info's, that might be dangling from it. */
+
+static void
+free_painfo (objp)
+ PTR objp;
+{
+ struct objfile *objfile = (struct objfile *)objp;
+ struct dbx_symfile_info *dbxinfo = (struct dbx_symfile_info *)
+ objfile->sym_private;
+ struct stab_section_info *ssi, *nssi;
+
+ ssi = dbxinfo->stab_section_info;
+ while (ssi)
+ {
+ nssi = ssi->next;
+ mfree (objfile->md, ssi);
+ ssi = nssi;
+ }
+
+ dbxinfo->stab_section_info = 0; /* Just say No mo info about this. */
+}
+
+/* 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 PA file. */
+
+static void
+pa_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
+pa_symfile_finish (objfile)
+ struct objfile *objfile;
+{
+ if (objfile -> sym_private != NULL)
+ {
+ mfree (objfile -> md, objfile -> sym_private);
+ }
+}
+
+#if 0
+
+
+
+
+
+ mainline,
+ stabsect->filepos, /* .stab offset */
+ bfd_get_section_size_before_reloc (stabsect), /* .stab size */
+ stabstringsect->filepos, /* .stabstr offset */
+ bfd_get_section_size_before_reloc (stabstringsect), /* .stabstr size */
+ obj_dbx_symbol_entry_size (abfd));
+
+
+#endif
+
+/* PA specific initialization routine for reading symbols.
+
+ It is passed a pointer to a struct sym_fns which contains, among other
+ things, the BFD for the file whose symbols are being read, and a slot for
+ a pointer to "private data" which we can fill with goodies.
+
+ This routine is almost a complete ripoff of dbx_symfile_init. The
+ common parts of these routines should be extracted and used instead of
+ duplicating this code. FIXME. */
+
+static void
+pa_symfile_init (objfile)
+ struct objfile *objfile;
+{
+ int val;
+ bfd *sym_bfd = objfile->obfd;
+ char *name = bfd_get_filename (sym_bfd);
+
+ /* Allocate struct to keep track of the symfile */
+ objfile->sym_private = (PTR)
+ xmmalloc (objfile -> md, sizeof (struct dbx_symfile_info));
+
+ /* FIXME POKING INSIDE BFD DATA STRUCTURES */
+#define STRING_TABLE_OFFSET (obj_dbx_str_filepos (sym_bfd))
+#define SYMBOL_TABLE_OFFSET (obj_dbx_sym_filepos (sym_bfd))
+
+ /* FIXME POKING INSIDE BFD DATA STRUCTURES */
+
+ DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL;
+ DBX_TEXT_SECT (objfile) = bfd_get_section_by_name (sym_bfd, ".text");
+ if (!DBX_TEXT_SECT (objfile))
+ error ("Can't find .text section in symbol file");
+
+ DBX_SYMBOL_SIZE (objfile) = obj_dbx_symbol_entry_size (sym_bfd);
+ DBX_SYMCOUNT (objfile) = obj_dbx_sym_count (sym_bfd);
+ DBX_SYMTAB_OFFSET (objfile) = SYMBOL_TABLE_OFFSET;
+
+ /* Read the string table and stash it away in the psymbol_obstack. It is
+ only needed as long as we need to expand psymbols into full symbols,
+ so when we blow away the psymbol the string table goes away as well.
+ Note that gdb used to use the results of attempting to malloc the
+ string table, based on the size it read, as a form of sanity check
+ for botched byte swapping, on the theory that a byte swapped string
+ table size would be so totally bogus that the malloc would fail. Now
+ that we put in on the psymbol_obstack, we can't do this since gdb gets
+ a fatal error (out of virtual memory) if the size is bogus. We can
+ however at least check to see if the size is zero or some negative
+ value. */
+
+ DBX_STRINGTAB_SIZE (objfile) = obj_dbx_stringtab_size (sym_bfd);
+
+ if (DBX_SYMCOUNT (objfile) == 0
+ || DBX_STRINGTAB_SIZE (objfile) == 0)
+ return;
+
+ if (DBX_STRINGTAB_SIZE (objfile) <= 0
+ || DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
+ error ("ridiculous string table size (%d bytes).",
+ DBX_STRINGTAB_SIZE (objfile));
+
+ DBX_STRINGTAB (objfile) =
+ (char *) obstack_alloc (&objfile -> psymbol_obstack,
+ DBX_STRINGTAB_SIZE (objfile));
+
+ /* Now read in the string table in one big gulp. */
+
+ val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, L_SET);
+ if (val < 0)
+ perror_with_name (name);
+ val = bfd_read (DBX_STRINGTAB (objfile), DBX_STRINGTAB_SIZE (objfile), 1,
+ sym_bfd);
+ if (val != DBX_STRINGTAB_SIZE (objfile))
+ perror_with_name (name);
+}
+
+/* PA specific parsing routine for section offsets.
+
+ Plain and simple for now. */
+
+static struct section_offsets *
+pa_symfile_offsets (objfile, addr)
+ struct objfile *objfile;
+ CORE_ADDR addr;
+{
+ struct section_offsets *section_offsets;
+ int i;
+
+ 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 PA object file formats. */
+
+/* This is probably a mistake. FIXME. Why can't the HP's use an ordinary
+ file format name with an -hppa suffix? */
+static struct sym_fns pa_sym_fns =
+{
+ "hppa", /* sym_name: name or name prefix of BFD target type */
+ 4, /* sym_namelen: number of significant sym_name chars */
+ pa_new_init, /* sym_new_init: init anything gbl to entire symtab */
+ pa_symfile_init, /* sym_init: read initial info, setup for sym_read() */
+ pa_symfile_read, /* sym_read: read a symbol file into symtab */
+ pa_symfile_finish, /* sym_finish: finished with file, cleanup */
+ pa_symfile_offsets, /* sym_offsets: Translate ext. to int. relocation */
+ NULL /* next: pointer to next struct sym_fns */
+};
+
+void
+_initialize_paread ()
+{
+ add_symtab_fns (&pa_sym_fns);
+}
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