1 /* BFD back-end for AIX on PS/2 core files.
2 This was based on trad-core.c, which was written by John Gilmore of
3 Cygnus Support.
4 Copyright (C) 1988-2016 Free Software Foundation, Inc.
5 Written by Minh Tran-Le <TRANLE@INTELLICORP.COM>.
6 Converted to back end form by Ian Lance Taylor <ian@cygnus.com>.
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
23 MA 02110-1301, USA. */
24
25 #include "sysdep.h"
26 #include "bfd.h"
27 #include "libbfd.h"
28 #include "coff/i386.h"
29 #include "coff/internal.h"
30 #include "libcoff.h"
31
32 #include <signal.h>
33
34 #if defined (_AIX) && defined (_I386)
35 #define NOCHECKS /* This is for coredump.h. */
36 #define _h_USER /* Avoid including user.h from coredump.h. */
37 #include <uinfo.h>
38 #include <sys/i386/coredump.h>
39 #endif /* _AIX && _I386 */
40
41 /* Maybe this could work on some other i386 but I have not tried it
42 * mtranle@paris - Tue Sep 24 12:49:35 1991
43 */
44
45 #ifndef COR_MAGIC
46 # define COR_MAGIC "core"
47 #endif
48
49 /* Need this cast because ptr is really void *. */
50 #define core_hdr(bfd) \
51 (((bfd->tdata.trad_core_data))->hdr)
52 #define core_section(bfd,n) \
53 (((bfd)->tdata.trad_core_data)->sections[n])
54 #define core_regsec(bfd) \
55 (((bfd)->tdata.trad_core_data)->reg_section)
56 #define core_reg2sec(bfd) \
57 (((bfd)->tdata.trad_core_data)->reg2_section)
58
59 /* These are stored in the bfd's tdata. */
60 struct trad_core_struct
61 {
62 struct corehdr *hdr; /* core file header */
63 asection *reg_section;
64 asection *reg2_section;
65 asection *sections[MAX_CORE_SEGS];
66 };
67
68 static const bfd_target *
aix386_core_file_p(bfd * abfd)69 aix386_core_file_p (bfd *abfd)
70 {
71 int i, n;
72 unsigned char longbuf[4]; /* Raw bytes of various header fields */
73 bfd_size_type core_size = sizeof (struct corehdr);
74 bfd_size_type amt;
75 struct corehdr *core;
76 struct mergem
77 {
78 struct trad_core_struct coredata;
79 struct corehdr internal_core;
80 } *mergem;
81 flagword flags;
82
83 amt = sizeof (longbuf);
84 if (bfd_bread (longbuf, amt, abfd) != amt)
85 {
86 if (bfd_get_error () != bfd_error_system_call)
87 bfd_set_error (bfd_error_wrong_format);
88 return 0;
89 }
90
91 if (strncmp (longbuf, COR_MAGIC, 4))
92 return 0;
93
94 if (bfd_seek (abfd, (file_ptr) 0, 0) != 0)
95 return 0;
96
97 amt = sizeof (struct mergem);
98 mergem = (struct mergem *) bfd_zalloc (abfd, amt);
99 if (mergem == NULL)
100 return 0;
101
102 core = &mergem->internal_core;
103
104 if ((bfd_bread (core, core_size, abfd)) != core_size)
105 {
106 if (bfd_get_error () != bfd_error_system_call)
107 bfd_set_error (bfd_error_wrong_format);
108 loser:
109 bfd_release (abfd, (char *) mergem);
110 abfd->tdata.any = NULL;
111 bfd_section_list_clear (abfd);
112 return 0;
113 }
114
115 set_tdata (abfd, &mergem->coredata);
116 core_hdr (abfd) = core;
117
118 /* Create the sections. */
119 flags = SEC_HAS_CONTENTS;
120 core_regsec (abfd) = bfd_make_section_anyway_with_flags (abfd, ".reg",
121 flags);
122 if (core_regsec (abfd) == NULL)
123 goto loser;
124
125 core_regsec (abfd)->size = sizeof (core->cd_regs);
126 core_regsec (abfd)->vma = (bfd_vma) -1;
127
128 /* We'll access the regs afresh in the core file, like any section. */
129 core_regsec (abfd)->filepos =
130 (file_ptr) offsetof (struct corehdr, cd_regs[0]);
131
132 flags = SEC_HAS_CONTENTS;
133 core_reg2sec (abfd) = bfd_make_section_anyway_with_flags (abfd, ".reg2",
134 flags);
135 if (core_reg2sec (abfd) == NULL)
136 /* bfd_release frees everything allocated after it's arg. */
137 goto loser;
138
139 core_reg2sec (abfd)->size = sizeof (core->cd_fpregs);
140 core_reg2sec (abfd)->vma = (bfd_vma) -1;
141 core_reg2sec (abfd)->filepos =
142 (file_ptr) offsetof (struct corehdr, cd_fpregs);
143
144 for (i = 0, n = 0; (i < MAX_CORE_SEGS) && (core->cd_segs[i].cs_type); i++)
145 {
146 const char *sname;
147 flagword flags;
148
149 if (core->cd_segs[i].cs_offset == 0)
150 continue;
151
152 switch (core->cd_segs[i].cs_type)
153 {
154 case COR_TYPE_DATA:
155 sname = ".data";
156 flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
157 break;
158 case COR_TYPE_STACK:
159 sname = ".stack";
160 flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
161 break;
162 case COR_TYPE_LIBDATA:
163 sname = ".libdata";
164 flags = SEC_ALLOC + SEC_HAS_CONTENTS;
165 break;
166 case COR_TYPE_WRITE:
167 sname = ".writeable";
168 flags = SEC_ALLOC + SEC_HAS_CONTENTS;
169 break;
170 case COR_TYPE_MSC:
171 sname = ".misc";
172 flags = SEC_ALLOC + SEC_HAS_CONTENTS;
173 break;
174 default:
175 sname = ".unknown";
176 flags = SEC_ALLOC + SEC_HAS_CONTENTS;
177 break;
178 }
179 core_section (abfd, n) = bfd_make_section_anyway_with_flags (abfd,
180 sname,
181 flags);
182 if (core_section (abfd, n) == NULL)
183 goto loser;
184
185 core_section (abfd, n)->size = core->cd_segs[i].cs_len;
186 core_section (abfd, n)->vma = core->cd_segs[i].cs_address;
187 core_section (abfd, n)->filepos = core->cd_segs[i].cs_offset;
188 core_section (abfd, n)->alignment_power = 2;
189 n++;
190 }
191
192 return abfd->xvec;
193 }
194
195 static char *
aix386_core_file_failing_command(bfd * abfd)196 aix386_core_file_failing_command (bfd *abfd)
197 {
198 return core_hdr (abfd)->cd_comm;
199 }
200
201 static int
aix386_core_file_failing_signal(bfd * abfd)202 aix386_core_file_failing_signal (bfd *abfd)
203 {
204 return core_hdr (abfd)->cd_cursig;
205 }
206
207 #define aix386_core_file_matches_executable_p generic_core_file_matches_executable_p
208
209 #define aix386_core_file_pid _bfd_nocore_core_file_pid
210
211 /* If somebody calls any byte-swapping routines, shoot them. */
212
213 static void
swap_abort(void)214 swap_abort (void)
215 {
216 /* This way doesn't require any declaration for ANSI to fuck up. */
217 abort ();
218 }
219
220 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
221 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
222 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
223 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
224 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
225 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
226
227 const bfd_target core_aix386_vec =
228 {
229 "aix386-core",
230 bfd_target_unknown_flavour,
231 BFD_ENDIAN_BIG, /* target byte order */
232 BFD_ENDIAN_BIG, /* target headers byte order */
233 (HAS_RELOC | EXEC_P | /* object flags */
234 HAS_LINENO | HAS_DEBUG |
235 HAS_SYMS | HAS_LOCALS | WP_TEXT),
236
237 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
238 0, /* leading underscore */
239 ' ', /* ar_pad_char */
240 16, /* ar_max_namelen */
241 0, /* match priority. */
242 NO_GET64, NO_GETS64, NO_PUT64,
243 NO_GET, NO_GETS, NO_PUT,
244 NO_GET, NO_GETS, NO_PUT, /* data */
245 NO_GET64, NO_GETS64, NO_PUT64,
246 NO_GET, NO_GETS, NO_PUT,
247 NO_GET, NO_GETS, NO_PUT, /* hdrs */
248
249 {_bfd_dummy_target, _bfd_dummy_target,
250 _bfd_dummy_target, aix386_core_file_p},
251 {bfd_false, bfd_false, /* bfd_create_object */
252 bfd_false, bfd_false},
253 {bfd_false, bfd_false, /* bfd_write_contents */
254 bfd_false, bfd_false},
255
256 BFD_JUMP_TABLE_GENERIC (_bfd_generic),
257 BFD_JUMP_TABLE_COPY (_bfd_generic),
258 BFD_JUMP_TABLE_CORE (aix386),
259 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
260 BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
261 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
262 BFD_JUMP_TABLE_WRITE (_bfd_generic),
263 BFD_JUMP_TABLE_LINK (_bfd_nolink),
264 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
265
266 NULL,
267
268 NULL
269 };
270