1 /* BFD back-end for OSF/1 core files.
2 Copyright (C) 1993-2023 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
41 struct 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
51 static asection *
52 make_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
73 static bfd_cleanup
74 osf_core_core_file_p (bfd *abfd)
75 {
76 int val;
77 int i;
78 char *secname;
79 struct core_filehdr core_header;
80 size_t 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 (! startswith (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"),
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 _bfd_no_cleanup;
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
150 static char *
151 osf_core_core_file_failing_command (bfd *abfd)
152 {
153 return core_command (abfd);
154 }
155
156 static int
157 osf_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. */
163 static void
164 swap_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 ((uint64_t (*) (const void *)) swap_abort)
173 #define NO_PUT64 ((void (*) (uint64_t, void *)) swap_abort)
174 #define NO_GETS64 ((int64_t (*) (const void *)) swap_abort)
175
176 const 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 TARGET_KEEP_UNUSED_SECTION_SYMBOLS, /* keep unused section symbols. */
191 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data */
192 NO_GET, NO_GETS, NO_PUT, /* 32 bit data */
193 NO_GET, NO_GETS, NO_PUT, /* 16 bit data */
194 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs */
195 NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs */
196 NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs */
197
198 { /* bfd_check_format */
199 _bfd_dummy_target, /* unknown format */
200 _bfd_dummy_target, /* object file */
201 _bfd_dummy_target, /* archive */
202 osf_core_core_file_p /* a core file */
203 },
204 { /* bfd_set_format */
205 _bfd_bool_bfd_false_error,
206 _bfd_bool_bfd_false_error,
207 _bfd_bool_bfd_false_error,
208 _bfd_bool_bfd_false_error
209 },
210 { /* bfd_write_contents */
211 _bfd_bool_bfd_false_error,
212 _bfd_bool_bfd_false_error,
213 _bfd_bool_bfd_false_error,
214 _bfd_bool_bfd_false_error
215 },
216
217 BFD_JUMP_TABLE_GENERIC (_bfd_generic),
218 BFD_JUMP_TABLE_COPY (_bfd_generic),
219 BFD_JUMP_TABLE_CORE (osf_core),
220 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
221 BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
222 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
223 BFD_JUMP_TABLE_WRITE (_bfd_generic),
224 BFD_JUMP_TABLE_LINK (_bfd_nolink),
225 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
226
227 NULL,
228
229 NULL /* backend_data */
230 };