1 /* BFD backend for core files which use the ptrace_user structure
2 Copyright 1993 Free Software Foundation, Inc.
3 The structure of this file is based on trad-core.c written by John Gilmore
5 Modified to work with the ptrace_user structure by Kevin A. Buettner.
6 (Longterm it may be better to merge this file with trad-core.c)
8 This file is part of BFD, the Binary File Descriptor library.
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 2 of the License, or
13 (at your option) any later version.
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.
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., 675 Mass Ave, Cambridge, MA 02139, USA.
24 To use this file on a particular host, configure the host with these
25 parameters in the config/h-HOST file:
27 HDEFINES=-DPTRACE_CORE
28 HDEPFILES=ptrace-core.o
39 #include <sys/types.h>
40 #include <sys/param.h>
45 #include <sys/ptrace.h>
48 struct trad_core_struct
50 asection *data_section;
51 asection *stack_section;
52 asection *reg_section;
56 #define core_upage(bfd) (&((bfd)->tdata.trad_core_data->u))
57 #define core_datasec(bfd) ((bfd)->tdata.trad_core_data->data_section)
58 #define core_stacksec(bfd) ((bfd)->tdata.trad_core_data->stack_section)
59 #define core_regsec(bfd) ((bfd)->tdata.trad_core_data->reg_section)
61 /* forward declarations */
63 bfd_target * ptrace_unix_core_file_p PARAMS ((bfd *abfd));
64 char * ptrace_unix_core_file_failing_command PARAMS ((bfd *abfd));
65 int ptrace_unix_core_file_failing_signal PARAMS ((bfd *abfd));
66 boolean ptrace_unix_core_file_matches_executable_p
67 PARAMS ((bfd *core_bfd, bfd *exec_bfd));
71 ptrace_unix_core_file_p (abfd)
78 val = bfd_read ((void *)&u, 1, sizeof u, abfd);
79 if (val != sizeof u || u.pt_magic != _BCS_PTRACE_MAGIC
80 || u.pt_rev != _BCS_PTRACE_REV)
82 /* Too small to be a core file */
83 bfd_set_error (bfd_error_wrong_format);
87 /* OK, we believe you. You're a core file (sure, sure). */
89 /* Allocate both the upage and the struct core_data at once, so
90 a single free() will free them both. */
91 rawptr = (struct trad_core_struct *)
92 bfd_zalloc (abfd, sizeof (struct trad_core_struct));
95 bfd_set_error (bfd_error_no_memory);
99 abfd->tdata.trad_core_data = rawptr;
101 rawptr->u = u; /*Copy the uarea into the tdata part of the bfd */
103 /* Create the sections. This is raunchy, but bfd_close wants to free
106 core_stacksec(abfd) = (asection *) bfd_zmalloc (sizeof (asection));
107 if (core_stacksec (abfd) == NULL) {
109 bfd_set_error (bfd_error_no_memory);
110 free ((void *)rawptr);
113 core_datasec (abfd) = (asection *) zalloc (sizeof (asection));
114 if (core_datasec (abfd) == NULL) {
116 free ((void *)core_stacksec (abfd));
119 core_regsec (abfd) = (asection *) zalloc (sizeof (asection));
120 if (core_regsec (abfd) == NULL) {
121 free ((void *)core_datasec (abfd));
125 core_stacksec (abfd)->name = ".stack";
126 core_datasec (abfd)->name = ".data";
127 core_regsec (abfd)->name = ".reg";
129 /* FIXME: Need to worry about shared memory, library data, and library
130 text. I don't think that any of these things are supported on the
131 system on which I am developing this for though. */
134 core_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
135 core_datasec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
136 core_regsec (abfd)->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
138 core_datasec (abfd)->_raw_size = u.pt_dsize;
139 core_stacksec (abfd)->_raw_size = u.pt_ssize;
140 core_regsec (abfd)->_raw_size = sizeof(u);
142 core_datasec (abfd)->vma = u.pt_o_data_start;
143 core_stacksec (abfd)->vma = USRSTACK - u.pt_ssize;
144 core_regsec (abfd)->vma = 0 - sizeof(u); /* see trad-core.c */
146 core_datasec (abfd)->filepos = (int) u.pt_dataptr;
147 core_stacksec (abfd)->filepos = (int) (u.pt_dataptr + u.pt_dsize);
148 core_regsec (abfd)->filepos = 0; /* Register segment is ptrace_user */
150 /* Align to word at least */
151 core_stacksec (abfd)->alignment_power = 2;
152 core_datasec (abfd)->alignment_power = 2;
153 core_regsec (abfd)->alignment_power = 2;
155 abfd->sections = core_stacksec (abfd);
156 core_stacksec (abfd)->next = core_datasec (abfd);
157 core_datasec (abfd)->next = core_regsec (abfd);
158 abfd->section_count = 3;
164 ptrace_unix_core_file_failing_command (abfd)
167 char *com = abfd->tdata.trad_core_data->u.pt_comm;
176 ptrace_unix_core_file_failing_signal (abfd)
179 return abfd->tdata.trad_core_data->u.pt_sigframe.sig_num;
184 ptrace_unix_core_file_matches_executable_p (core_bfd, exec_bfd)
185 bfd *core_bfd, *exec_bfd;
187 /* FIXME: Use pt_timdat field of the ptrace_user structure to match
188 the date of the executable */
192 /* If somebody calls any byte-swapping routines, shoot them. */
196 abort(); /* This way doesn't require any declaration for ANSI to fuck up */
198 #define NO_GET ((bfd_vma (*) PARAMS (( const bfd_byte *))) swap_abort )
199 #define NO_PUT ((void (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
200 #define NO_SIGNED_GET \
201 ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
203 bfd_target ptrace_core_vec =
206 bfd_target_unknown_flavour,
207 true, /* target byte order */
208 true, /* target headers byte order */
209 (HAS_RELOC | EXEC_P | /* object flags */
210 HAS_LINENO | HAS_DEBUG |
211 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
212 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
213 0, /* symbol prefix */
214 ' ', /* ar_pad_char */
215 16, /* ar_max_namelen */
216 3, /* minimum alignment power */
217 NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit data */
218 NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit data */
219 NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit data */
220 NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit hdrs */
221 NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit hdrs */
222 NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit hdrs */
224 { /* bfd_check_format */
225 _bfd_dummy_target, /* unknown format */
226 _bfd_dummy_target, /* object file */
227 _bfd_dummy_target, /* archive */
228 ptrace_unix_core_file_p /* a core file */
230 { /* bfd_set_format */
231 bfd_false, bfd_false,
234 { /* bfd_write_contents */
235 bfd_false, bfd_false,
239 BFD_JUMP_TABLE_GENERIC (_bfd_generic),
240 BFD_JUMP_TABLE_COPY (_bfd_generic),
241 BFD_JUMP_TABLE_CORE (ptrace_unix),
242 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
243 BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
244 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
245 BFD_JUMP_TABLE_WRITE (_bfd_generic),
246 BFD_JUMP_TABLE_LINK (_bfd_nolink),
248 (PTR) 0 /* backend_data */
251 #endif /* PTRACE_CORE */