1 /* BFD backend for core files which use the ptrace_user structure
2 Copyright (C) 1993-2014 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
23 MA 02110-1301, USA. */
31 #include <sys/param.h>
34 #include <sys/ptrace.h>
36 struct trad_core_struct
38 asection *data_section;
39 asection *stack_section;
40 asection *reg_section;
44 #define core_upage(bfd) (&((bfd)->tdata.trad_core_data->u))
45 #define core_datasec(bfd) ((bfd)->tdata.trad_core_data->data_section)
46 #define core_stacksec(bfd) ((bfd)->tdata.trad_core_data->stack_section)
47 #define core_regsec(bfd) ((bfd)->tdata.trad_core_data->reg_section)
49 /* forward declarations */
51 const bfd_target *ptrace_unix_core_file_p (bfd *abfd);
52 char * ptrace_unix_core_file_failing_command (bfd *abfd);
53 int ptrace_unix_core_file_failing_signal (bfd *abfd);
54 #define ptrace_unix_core_file_matches_executable_p generic_core_file_matches_executable_p
55 #define ptrace_unix_core_file_pid _bfd_nocore_core_file_pid
56 static void swap_abort (void);
59 ptrace_unix_core_file_p (bfd *abfd)
63 struct trad_core_struct *rawptr;
67 val = bfd_bread ((void *)&u, (bfd_size_type) sizeof u, abfd);
68 if (val != sizeof u || u.pt_magic != _BCS_PTRACE_MAGIC
69 || u.pt_rev != _BCS_PTRACE_REV)
71 /* Too small to be a core file */
72 bfd_set_error (bfd_error_wrong_format);
76 /* OK, we believe you. You're a core file (sure, sure). */
78 /* Allocate both the upage and the struct core_data at once, so
79 a single free() will free them both. */
80 amt = sizeof (struct trad_core_struct);
81 rawptr = (struct trad_core_struct *) bfd_zalloc (abfd, amt);
86 abfd->tdata.trad_core_data = rawptr;
88 rawptr->u = u; /*Copy the uarea into the tdata part of the bfd */
90 /* Create the sections. */
92 flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
93 core_stacksec (abfd) = bfd_make_section_anyway_with_flags (abfd, ".stack",
95 if (core_stacksec (abfd) == NULL)
97 core_datasec (abfd) = bfd_make_section_anyway_with_flags (abfd, ".data",
99 if (core_datasec (abfd) == NULL)
101 core_regsec (abfd) = bfd_make_section_anyway_with_flags (abfd, ".reg",
103 if (core_regsec (abfd) == NULL)
106 /* FIXME: Need to worry about shared memory, library data, and library
107 text. I don't think that any of these things are supported on the
108 system on which I am developing this for though. */
110 core_datasec (abfd)->size = u.pt_dsize;
111 core_stacksec (abfd)->size = u.pt_ssize;
112 core_regsec (abfd)->size = sizeof (u);
114 core_datasec (abfd)->vma = u.pt_o_data_start;
115 core_stacksec (abfd)->vma = USRSTACK - u.pt_ssize;
116 core_regsec (abfd)->vma = 0 - sizeof (u); /* see trad-core.c */
118 core_datasec (abfd)->filepos = (int) u.pt_dataptr;
119 core_stacksec (abfd)->filepos = (int) (u.pt_dataptr + u.pt_dsize);
120 core_regsec (abfd)->filepos = 0; /* Register segment is ptrace_user */
122 /* Align to word at least */
123 core_stacksec (abfd)->alignment_power = 2;
124 core_datasec (abfd)->alignment_power = 2;
125 core_regsec (abfd)->alignment_power = 2;
130 bfd_release (abfd, abfd->tdata.any);
131 abfd->tdata.any = NULL;
132 bfd_section_list_clear (abfd);
137 ptrace_unix_core_file_failing_command (bfd *abfd)
139 char *com = abfd->tdata.trad_core_data->u.pt_comm;
148 ptrace_unix_core_file_failing_signal (bfd *abfd)
150 return abfd->tdata.trad_core_data->u.pt_sigframe.sig_num;
153 /* If somebody calls any byte-swapping routines, shoot them. */
157 abort (); /* This way doesn't require any declaration for ANSI to fuck up */
160 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
161 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
162 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
163 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
164 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
165 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
167 const bfd_target ptrace_core_vec =
170 bfd_target_unknown_flavour,
171 BFD_ENDIAN_UNKNOWN, /* target byte order */
172 BFD_ENDIAN_UNKNOWN, /* target headers byte order */
173 (HAS_RELOC | EXEC_P | /* object flags */
174 HAS_LINENO | HAS_DEBUG |
175 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
176 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
177 0, /* symbol prefix */
178 ' ', /* ar_pad_char */
179 16, /* ar_max_namelen */
180 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data */
181 NO_GET, NO_GETS, NO_PUT, /* 32 bit data */
182 NO_GET, NO_GETS, NO_PUT, /* 16 bit data */
183 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs */
184 NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs */
185 NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs */
187 { /* bfd_check_format */
188 _bfd_dummy_target, /* unknown format */
189 _bfd_dummy_target, /* object file */
190 _bfd_dummy_target, /* archive */
191 ptrace_unix_core_file_p /* a core file */
193 { /* bfd_set_format */
194 bfd_false, bfd_false,
197 { /* bfd_write_contents */
198 bfd_false, bfd_false,
202 BFD_JUMP_TABLE_GENERIC (_bfd_generic),
203 BFD_JUMP_TABLE_COPY (_bfd_generic),
204 BFD_JUMP_TABLE_CORE (ptrace_unix),
205 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
206 BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
207 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
208 BFD_JUMP_TABLE_WRITE (_bfd_generic),
209 BFD_JUMP_TABLE_LINK (_bfd_nolink),
210 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
214 NULL /* backend_data */
217 #endif /* PTRACE_CORE */