1 /* BFD back-end for HPPA BSD 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 Written by the Center for Software Science at the University of Utah
22 and by Cygnus Support.
23
24 The core file structure for the Utah 4.3BSD and OSF1 ports on the
25 PA is a mix between traditional cores and hpux cores -- just
26 different enough that supporting this format would tend to add
27 gross hacks to trad-core.c or hpux-core.c. So instead we keep any
28 gross hacks isolated to this file. */
29
30 /* This file can only be compiled on systems which use HPPA-BSD style
31 core files.
32
33 I would not expect this to be of use to any other host/target, but
34 you never know. */
35
36 #include "sysdep.h"
37 #include "bfd.h"
38 #include "libbfd.h"
39
40 #if defined (HOST_HPPABSD)
41
42 #include "machine/vmparam.h"
43
44 #include <sys/param.h>
45 #include <sys/dir.h>
46 #include <signal.h>
47 #include <machine/reg.h>
48 #include <sys/user.h> /* After a.out.h */
49 #include <sys/file.h>
50
51 #define hppabsd_core_core_file_matches_executable_p generic_core_file_matches_executable_p
52 #define hppabsd_core_core_file_pid _bfd_nocore_core_file_pid
53
54 /* These are stored in the bfd's tdata. */
55
56 struct hppabsd_core_struct
57 {
58 int sig;
59 char cmd[MAXCOMLEN + 1];
60 asection *data_section;
61 asection *stack_section;
62 asection *reg_section;
63 };
64
65 #define core_hdr(bfd) ((bfd)->tdata.hppabsd_core_data)
66 #define core_signal(bfd) (core_hdr(bfd)->sig)
67 #define core_command(bfd) (core_hdr(bfd)->cmd)
68 #define core_datasec(bfd) (core_hdr(bfd)->data_section)
69 #define core_stacksec(bfd) (core_hdr(bfd)->stack_section)
70 #define core_regsec(bfd) (core_hdr(bfd)->reg_section)
71
72 static asection *
73 make_bfd_asection (bfd *abfd,
74 const char *name,
75 flagword flags,
76 bfd_size_type size,
77 file_ptr offset,
78 unsigned int alignment_power)
79 {
80 asection *asect;
81
82 asect = bfd_make_section_with_flags (abfd, name, flags);
83 if (!asect)
84 return NULL;
85
86 asect->size = size;
87 asect->filepos = offset;
88 asect->alignment_power = alignment_power;
89
90 return asect;
91 }
92
93 static bfd_cleanup
94 hppabsd_core_core_file_p (bfd *abfd)
95 {
96 int val;
97 struct user u;
98 struct hppabsd_core_struct *coredata;
99 int clicksz;
100
101 /* Try to read in the u-area. We will need information from this
102 to know how to grok the rest of the core structures. */
103 val = bfd_bread ((void *) &u, (bfd_size_type) sizeof u, abfd);
104 if (val != sizeof u)
105 {
106 if (bfd_get_error () != bfd_error_system_call)
107 bfd_set_error (bfd_error_wrong_format);
108 return NULL;
109 }
110
111 /* Get the page size out of the u structure. This will be different
112 for PA 1.0 machines and PA 1.1 machines. Yuk! */
113 clicksz = u.u_pcb.pcb_pgsz;
114
115 /* clicksz must be a power of two >= 2k. */
116 if (clicksz < 0x800
117 || clicksz != (clicksz & -clicksz))
118 {
119 bfd_set_error (bfd_error_wrong_format);
120 return NULL;
121 }
122
123 /* Sanity checks. Make sure the size of the core file matches the
124 the size computed from information within the core itself. */
125 {
126 struct stat statbuf;
127
128 if (bfd_stat (abfd, &statbuf) < 0)
129 return NULL;
130
131 if (NBPG * (UPAGES + u.u_dsize + u.u_ssize) > statbuf.st_size)
132 {
133 bfd_set_error (bfd_error_file_truncated);
134 return NULL;
135 }
136 if (clicksz * (UPAGES + u.u_dsize + u.u_ssize) < statbuf.st_size)
137 {
138 /* The file is too big. Maybe it's not a core file
139 or we otherwise have bad values for u_dsize and u_ssize). */
140 bfd_set_error (bfd_error_wrong_format);
141 return NULL;
142 }
143 }
144
145 /* OK, we believe you. You're a core file (sure, sure). */
146
147 coredata = (struct hppabsd_core_struct *)
148 bfd_zalloc (abfd, (bfd_size_type) sizeof (struct hppabsd_core_struct));
149 if (!coredata)
150 return NULL;
151
152 /* Make the core data and available via the tdata part of the BFD. */
153 abfd->tdata.hppabsd_core_data = coredata;
154
155 /* Create the sections. */
156 core_stacksec (abfd) = make_bfd_asection (abfd, ".stack",
157 SEC_ALLOC + SEC_HAS_CONTENTS,
158 clicksz * u.u_ssize,
159 NBPG * (USIZE + KSTAKSIZE)
160 + clicksz * u.u_dsize, 2);
161 if (core_stacksec (abfd) == NULL)
162 goto fail;
163 core_stacksec (abfd)->vma = USRSTACK;
164
165 core_datasec (abfd) = make_bfd_asection (abfd, ".data",
166 SEC_ALLOC + SEC_LOAD
167 + SEC_HAS_CONTENTS,
168 clicksz * u.u_dsize,
169 NBPG * (USIZE + KSTAKSIZE), 2);
170 if (core_datasec (abfd) == NULL)
171 goto fail;
172 core_datasec (abfd)->vma = UDATASEG;
173
174 core_regsec (abfd) = make_bfd_asection (abfd, ".reg",
175 SEC_HAS_CONTENTS,
176 KSTAKSIZE * NBPG,
177 NBPG * USIZE, 2);
178 if (core_regsec (abfd) == NULL)
179 goto fail;
180 core_regsec (abfd)->vma = 0;
181
182 strncpy (core_command (abfd), u.u_comm, MAXCOMLEN + 1);
183 core_signal (abfd) = u.u_code;
184 return _bfd_no_cleanup;
185
186 fail:
187 bfd_release (abfd, abfd->tdata.any);
188 abfd->tdata.any = NULL;
189 bfd_section_list_clear (abfd);
190 return NULL;
191 }
192
193 static char *
194 hppabsd_core_core_file_failing_command (bfd *abfd)
195 {
196 return core_command (abfd);
197 }
198
199 static int
200 hppabsd_core_core_file_failing_signal (bfd *abfd)
201 {
202 return core_signal (abfd);
203 }
204
205 /* If somebody calls any byte-swapping routines, shoot them. */
206 static void
207 swap_abort (void)
208 {
209 /* This way doesn't require any declaration for ANSI to fuck up. */
210 abort ();
211 }
212
213 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
214 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
215 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
216 #define NO_GET64 ((uint64_t (*) (const void *)) swap_abort)
217 #define NO_PUT64 ((void (*) (uint64_t, void *)) swap_abort)
218 #define NO_GETS64 ((int64_t (*) (const void *)) swap_abort)
219
220 const bfd_target core_hppabsd_vec =
221 {
222 "hppabsd-core",
223 bfd_target_unknown_flavour,
224 BFD_ENDIAN_BIG, /* target byte order */
225 BFD_ENDIAN_BIG, /* target headers byte order */
226 (HAS_RELOC | EXEC_P | /* object flags */
227 HAS_LINENO | HAS_DEBUG |
228 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
229 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
230 0, /* symbol prefix */
231 ' ', /* ar_pad_char */
232 16, /* ar_max_namelen */
233 TARGET_KEEP_UNUSED_SECTION_SYMBOLS, /* keep unused section symbols. */
234 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data */
235 NO_GET, NO_GETS, NO_PUT, /* 32 bit data */
236 NO_GET, NO_GETS, NO_PUT, /* 16 bit data */
237 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs */
238 NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs */
239 NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs */
240
241 { /* bfd_check_format */
242 _bfd_dummy_target, /* unknown format */
243 _bfd_dummy_target, /* object file */
244 _bfd_dummy_target, /* archive */
245 hppabsd_core_core_file_p /* a core file */
246 },
247 { /* bfd_set_format */
248 _bfd_bool_bfd_false_error,
249 _bfd_bool_bfd_false_error,
250 _bfd_bool_bfd_false_error,
251 _bfd_bool_bfd_false_error
252 },
253 { /* bfd_write_contents */
254 _bfd_bool_bfd_false_error,
255 _bfd_bool_bfd_false_error,
256 _bfd_bool_bfd_false_error,
257 _bfd_bool_bfd_false_error
258 },
259
260 BFD_JUMP_TABLE_GENERIC (_bfd_generic),
261 BFD_JUMP_TABLE_COPY (_bfd_generic),
262 BFD_JUMP_TABLE_CORE (hppabsd_core),
263 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
264 BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
265 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
266 BFD_JUMP_TABLE_WRITE (_bfd_generic),
267 BFD_JUMP_TABLE_LINK (_bfd_nolink),
268 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
269
270 NULL,
271
272 NULL /* backend_data */
273 };
274 #endif