/* BFD back end for NetBSD style core files
   Copyright 1988, 1989, 1991, 1992, 1993 Free Software Foundation, Inc.
   Written by Paul Kranenburg, EUR

This file is part of BFD, the Binary File Descriptor library.

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.

	$Id: netbsd-core.c,v 1.1 1995/10/18 08:39:53 deraadt Exp $
*/

/* To use this file on a particular host, configure the host with these
   parameters in the config/h-HOST file:

	HDEFINES=-DNETBSD_CORE
	HDEPFILES=netbsd-core.o

 */

#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
#include "libaout.h"           /* BFD a.out internal data structures */

#include <stdio.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/dir.h>
#include <signal.h>
#include <sys/core.h>

#include <errno.h>

struct netbsd_core_struct {
	struct core core;
} *rawptr;

/* forward declarations */

bfd_target *	netbsd_core_file_p PARAMS ((bfd *abfd));
char *		netbsd_core_file_failing_command PARAMS ((bfd *abfd));
int		netbsd_core_file_failing_signal PARAMS ((bfd *abfd));
boolean		netbsd_core_file_matches_executable_p
			 PARAMS ((bfd *core_bfd, bfd *exec_bfd));

/* Handle NetBSD-style core dump file.  */

/* ARGSUSED */
bfd_target *
netbsd_core_file_p (abfd)
     bfd *abfd;

{
	int		i, val, offset;
	asection	*asect, *asect2;
	struct core	core;
	struct coreseg	coreseg;

	val = bfd_read ((void *)&core, 1, sizeof core, abfd);
	if (val != sizeof core) {
		/* Too small to be a core file */
		bfd_error = wrong_format;
		return 0;
	}

	if (CORE_GETMAGIC(core) != COREMAGIC) {
		bfd_error = wrong_format;
		return 0;
	}

	rawptr = (struct netbsd_core_struct *)
		bfd_zalloc (abfd, sizeof (struct netbsd_core_struct));
	if (rawptr == NULL) {
		bfd_error = no_memory;
		return 0;
	}

	rawptr->core = core;
	abfd->tdata.netbsd_core_data = rawptr;

	offset = core.c_hdrsize;
	for (i = 0; i < core.c_nseg; i++) {

		if (bfd_seek (abfd, offset, SEEK_SET) != 0)
			goto punt;

		val = bfd_read ((void *)&coreseg, 1, sizeof coreseg, abfd);
		if (val != sizeof coreseg) {
			bfd_error = file_truncated;
			goto punt;
		}
		if (CORE_GETMAGIC(coreseg) != CORESEGMAGIC) {
			bfd_error = wrong_format;
			goto punt;
		}

		offset += core.c_seghdrsize;

		asect = (asection *) zalloc (sizeof (asection));
		if (asect == NULL) {
			bfd_error = no_memory;
			goto punt;
		}

		asect->_raw_size = coreseg.c_size;
		asect->vma = coreseg.c_addr;
		asect->filepos = offset;
		asect->alignment_power = 2;
		asect->next = abfd->sections;
		abfd->sections = asect;
		abfd->section_count++;
		offset += coreseg.c_size;

		switch (CORE_GETFLAG(coreseg)) {
		case CORE_CPU:
			asect->name = ".reg";
			asect->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
#ifdef CORE_FPU_OFFSET
			/* Hackish... */
			asect->_raw_size = CORE_FPU_OFFSET;
			asect2 = (asection *)zalloc (sizeof (asection));
			if (asect2 == NULL) {
				bfd_error = no_memory;
				goto punt;
			}
			asect2->_raw_size = coreseg.c_size - CORE_FPU_OFFSET;
			asect2->vma = 0;
			asect2->filepos = asect->filepos + CORE_FPU_OFFSET;
			asect2->alignment_power = 2;
			asect2->next = abfd->sections;
			asect2->name = ".reg2";
			asect2->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
			abfd->sections = asect2;
			abfd->section_count++;
#endif

			break;
		case CORE_DATA:
			asect->name = ".data";
			asect->flags = SEC_ALLOC+SEC_LOAD+SEC_HAS_CONTENTS;
			break;
		case CORE_STACK:
			asect->name = ".stack";
			asect->flags = SEC_ALLOC+SEC_LOAD+SEC_HAS_CONTENTS;
			break;
		}
	}

	/* OK, we believe you.  You're a core file (sure, sure).  */
	return abfd->xvec;

punt:	{
		asection	*anext;
		for (asect = abfd->sections; asect; asect = anext) {
			anext = asect->next;
			free((void *)asect);
		}
	}
	free ((void *)rawptr);
	abfd->tdata.netbsd_core_data = NULL;
	abfd->sections = NULL;
	abfd->section_count = 0;
	return 0;
}

char *
netbsd_core_file_failing_command (abfd)
	bfd *abfd;
{
	return abfd->tdata.netbsd_core_data->core.c_name;
}

/* ARGSUSED */
int
netbsd_core_file_failing_signal (abfd)
	bfd *abfd;
{
	return abfd->tdata.netbsd_core_data->core.c_signo;
}

/* ARGSUSED */
boolean
netbsd_core_file_matches_executable_p  (core_bfd, exec_bfd)
     bfd *core_bfd, *exec_bfd;
{
	return true;	/* FIXME, We have no way of telling at this point */
}

/* No archive file support via this BFD */
#define	netbsd_openr_next_archived_file	bfd_generic_openr_next_archived_file
#define	netbsd_generic_stat_arch_elt		bfd_generic_stat_arch_elt
#define	netbsd_slurp_armap			bfd_false
#define	netbsd_slurp_extended_name_table	bfd_true
#define	netbsd_write_armap			(boolean (*) PARAMS	\
    ((bfd *arch, unsigned int elength, struct orl *map, \
      unsigned int orl_count, int stridx))) bfd_false
#define	netbsd_truncate_arname		bfd_dont_truncate_arname
#define	aout_32_openr_next_archived_file	bfd_generic_openr_next_archived_file

#define	netbsd_close_and_cleanup		bfd_generic_close_and_cleanup
#define	netbsd_set_section_contents		(boolean (*) PARAMS	\
        ((bfd *abfd, asection *section, PTR data, file_ptr offset,	\
        bfd_size_type count))) bfd_false
#define	netbsd_get_section_contents		bfd_generic_get_section_contents
#define	netbsd_new_section_hook		(boolean (*) PARAMS	\
	((bfd *, sec_ptr))) bfd_true
#define	netbsd_get_symtab_upper_bound	bfd_0u
#define	netbsd_get_symtab			(unsigned int (*) PARAMS \
        ((bfd *, struct symbol_cache_entry **))) bfd_0u
#define	netbsd_get_reloc_upper_bound		(unsigned int (*) PARAMS \
	((bfd *, sec_ptr))) bfd_0u
#define	netbsd_canonicalize_reloc		(unsigned int (*) PARAMS \
	((bfd *, sec_ptr, arelent **, struct symbol_cache_entry**))) bfd_0u
#define	netbsd_make_empty_symbol		(struct symbol_cache_entry * \
	(*) PARAMS ((bfd *))) bfd_false
#define	netbsd_print_symbol			(void (*) PARAMS	\
	((bfd *, PTR, struct symbol_cache_entry  *,			\
	bfd_print_symbol_type))) bfd_false
#define	netbsd_get_symbol_info		(void (*) PARAMS	\
	((bfd *, struct symbol_cache_entry  *,			\
	symbol_info *))) bfd_false
#define	netbsd_get_lineno			(alent * (*) PARAMS	\
	((bfd *, struct symbol_cache_entry *))) bfd_nullvoidptr
#define	netbsd_set_arch_mach			(boolean (*) PARAMS	\
	((bfd *, enum bfd_architecture, unsigned long))) bfd_false
#define	netbsd_find_nearest_line		(boolean (*) PARAMS	\
        ((bfd *abfd, struct sec  *section,				\
         struct symbol_cache_entry  **symbols,bfd_vma offset,		\
         CONST char **file, CONST char **func, unsigned int *line))) bfd_false
#define	netbsd_sizeof_headers		(int (*) PARAMS	\
	((bfd *, boolean))) bfd_0

#define netbsd_bfd_debug_info_start		bfd_void
#define netbsd_bfd_debug_info_end		bfd_void
#define netbsd_bfd_debug_info_accumulate	(void (*) PARAMS	\
	((bfd *, struct sec *))) bfd_void
#define netbsd_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
#define netbsd_bfd_relax_section		bfd_generic_relax_section
#define netbsd_bfd_seclet_link \
  ((boolean (*) PARAMS ((bfd *, PTR, boolean))) bfd_false)
#define netbsd_bfd_reloc_type_lookup \
  ((CONST struct reloc_howto_struct *(*) PARAMS ((bfd *, bfd_reloc_code_real_type))) bfd_nullvoidptr)
#define netbsd_bfd_make_debug_symbol \
  ((asymbol *(*) PARAMS ((bfd *, void *, unsigned long))) bfd_nullvoidptr)

/* If somebody calls any byte-swapping routines, shoot them.  */
void
netbsd_swap_abort()
{
  abort(); /* This way doesn't require any declaration for ANSI to fuck up */
}
#define	NO_GET	((bfd_vma (*) PARAMS ((         bfd_byte *))) netbsd_swap_abort )
#define	NO_PUT	((void    (*) PARAMS ((bfd_vma, bfd_byte *))) netbsd_swap_abort )
#define	NO_SIGNED_GET ((bfd_signed_vma (*) PARAMS ((bfd_byte *))) netbsd_swap_abort )

bfd_target netbsd_core_vec =
  {
    "netbsd-core",
    bfd_target_unknown_flavour,
    true,			/* target byte order */
    true,			/* target headers byte order */
    (HAS_RELOC | EXEC_P |	/* object flags */
     HAS_LINENO | HAS_DEBUG |
     HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
    (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
    0,			                                   /* symbol prefix */
    ' ',						   /* ar_pad_char */
    16,							   /* ar_max_namelen */
    3,							   /* minimum alignment power */
    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 64 bit data */
    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 32 bit data */
    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 16 bit data */
    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 64 bit hdrs */
    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 32 bit hdrs */
    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 16 bit hdrs */

    {				/* bfd_check_format */
     _bfd_dummy_target,		/* unknown format */
     _bfd_dummy_target,		/* object file */
     _bfd_dummy_target,		/* archive */
     netbsd_core_file_p		/* a core file */
    },
    {				/* bfd_set_format */
     bfd_false, bfd_false,
     bfd_false, bfd_false
    },
    {				/* bfd_write_contents */
     bfd_false, bfd_false,
     bfd_false, bfd_false
    },
    
    JUMP_TABLE(netbsd),
    (PTR) 0			/* backend_data */
};