-/* 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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