1/* BFD back-end for OSF/1 core files.
2   Copyright (C) 1993-2017 Free Software Foundation, Inc.
3
4   This file is part of BFD, the Binary File Descriptor library.
5
6   This program is free software; you can redistribute it and/or modify
7   it under the terms of the GNU General Public License as published by
8   the Free Software Foundation; either version 3 of the License, or
9   (at your option) any later version.
10
11   This program is distributed in the hope that it will be useful,
12   but WITHOUT ANY WARRANTY; without even the implied warranty of
13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14   GNU General Public License for more details.
15
16   You should have received a copy of the GNU General Public License
17   along with this program; if not, write to the Free Software
18   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19   MA 02110-1301, USA.  */
20
21
22/* This file can only be compiled on systems which use OSF/1 style
23   core files.  */
24
25#include "sysdep.h"
26#include "bfd.h"
27#include "libbfd.h"
28
29#include <sys/user.h>
30#ifdef OSF_CORE
31#include <sys/core.h>
32#endif
33
34/* forward declarations */
35
36#define osf_core_core_file_matches_executable_p generic_core_file_matches_executable_p
37#define osf_core_core_file_pid _bfd_nocore_core_file_pid
38
39/* These are stored in the bfd's tdata */
40
41struct osf_core_struct
42{
43  int sig;
44  char cmd[MAXCOMLEN + 1];
45};
46
47#define core_hdr(bfd) ((bfd)->tdata.osf_core_data)
48#define core_signal(bfd)  (core_hdr(bfd)->sig)
49#define core_command(bfd) (core_hdr(bfd)->cmd)
50
51static asection *
52make_bfd_asection (bfd *abfd,
53		   const char *name,
54		   flagword flags,
55		   bfd_size_type size,
56		   bfd_vma vma,
57		   file_ptr filepos)
58{
59  asection *asect;
60
61  asect = bfd_make_section_anyway_with_flags (abfd, name, flags);
62  if (!asect)
63    return NULL;
64
65  asect->size = size;
66  asect->vma = vma;
67  asect->filepos = filepos;
68  asect->alignment_power = 8;
69
70  return asect;
71}
72
73static const bfd_target *
74osf_core_core_file_p (bfd *abfd)
75{
76  int val;
77  int i;
78  char *secname;
79  struct core_filehdr core_header;
80  bfd_size_type amt;
81
82  amt = sizeof core_header;
83  val = bfd_bread (& core_header, amt, abfd);
84  if (val != sizeof core_header)
85    return NULL;
86
87  if (! CONST_STRNEQ (core_header.magic, "Core"))
88    return NULL;
89
90  core_hdr (abfd) = (struct osf_core_struct *)
91    bfd_zalloc (abfd, (bfd_size_type) sizeof (struct osf_core_struct));
92  if (!core_hdr (abfd))
93    return NULL;
94
95  strncpy (core_command (abfd), core_header.name, MAXCOMLEN + 1);
96  core_signal (abfd) = core_header.signo;
97
98  for (i = 0; i < core_header.nscns; i++)
99    {
100      struct core_scnhdr core_scnhdr;
101      flagword flags;
102
103      amt = sizeof core_scnhdr;
104      val = bfd_bread (& core_scnhdr, amt, abfd);
105      if (val != sizeof core_scnhdr)
106	break;
107
108      /* Skip empty sections.  */
109      if (core_scnhdr.size == 0 || core_scnhdr.scnptr == 0)
110	continue;
111
112      switch (core_scnhdr.scntype)
113	{
114	case SCNRGN:
115	  secname = ".data";
116	  flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
117	  break;
118	case SCNSTACK:
119	  secname = ".stack";
120	  flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
121	  break;
122	case SCNREGS:
123	  secname = ".reg";
124	  flags = SEC_HAS_CONTENTS;
125	  break;
126	default:
127	  _bfd_error_handler (_("Unhandled OSF/1 core file section type %d\n"),
128			      core_scnhdr.scntype);
129	  continue;
130	}
131
132      if (!make_bfd_asection (abfd, secname, flags,
133			      (bfd_size_type) core_scnhdr.size,
134			      (bfd_vma) core_scnhdr.vaddr,
135			      (file_ptr) core_scnhdr.scnptr))
136	goto fail;
137    }
138
139  /* OK, we believe you.  You're a core file (sure, sure).  */
140
141  return abfd->xvec;
142
143 fail:
144  bfd_release (abfd, core_hdr (abfd));
145  core_hdr (abfd) = NULL;
146  bfd_section_list_clear (abfd);
147  return NULL;
148}
149
150static char *
151osf_core_core_file_failing_command (bfd *abfd)
152{
153  return core_command (abfd);
154}
155
156static int
157osf_core_core_file_failing_signal (bfd *abfd)
158{
159  return core_signal (abfd);
160}
161
162/* If somebody calls any byte-swapping routines, shoot them.  */
163static void
164swap_abort (void)
165{
166  abort (); /* This way doesn't require any declaration for ANSI to fuck up */
167}
168
169#define	NO_GET ((bfd_vma (*) (const void *)) swap_abort)
170#define	NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
171#define	NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
172#define	NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
173#define	NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
174#define	NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
175
176const bfd_target core_osf_vec =
177  {
178    "osf-core",
179    bfd_target_unknown_flavour,
180    BFD_ENDIAN_LITTLE,		/* target byte order */
181    BFD_ENDIAN_LITTLE,		/* target headers byte order */
182    (HAS_RELOC | EXEC_P |	/* object flags */
183     HAS_LINENO | HAS_DEBUG |
184     HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
185    (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
186    0,				/* symbol prefix */
187    ' ',			/* ar_pad_char */
188    16,				/* ar_max_namelen */
189    0,				/* match priority.  */
190    NO_GET64, NO_GETS64, NO_PUT64,	/* 64 bit data */
191    NO_GET, NO_GETS, NO_PUT,		/* 32 bit data */
192    NO_GET, NO_GETS, NO_PUT,		/* 16 bit data */
193    NO_GET64, NO_GETS64, NO_PUT64,	/* 64 bit hdrs */
194    NO_GET, NO_GETS, NO_PUT,		/* 32 bit hdrs */
195    NO_GET, NO_GETS, NO_PUT,		/* 16 bit hdrs */
196
197    {				/* bfd_check_format */
198      _bfd_dummy_target,		/* unknown format */
199      _bfd_dummy_target,		/* object file */
200      _bfd_dummy_target,		/* archive */
201      osf_core_core_file_p		/* a core file */
202    },
203    {				/* bfd_set_format */
204      bfd_false, bfd_false,
205      bfd_false, bfd_false
206    },
207    {				/* bfd_write_contents */
208      bfd_false, bfd_false,
209      bfd_false, bfd_false
210    },
211
212    BFD_JUMP_TABLE_GENERIC (_bfd_generic),
213    BFD_JUMP_TABLE_COPY (_bfd_generic),
214    BFD_JUMP_TABLE_CORE (osf_core),
215    BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
216    BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
217    BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
218    BFD_JUMP_TABLE_WRITE (_bfd_generic),
219    BFD_JUMP_TABLE_LINK (_bfd_nolink),
220    BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
221
222    NULL,
223
224    NULL			/* backend_data */
225  };
226