1 /* BFD back-end for os9000 i386 binaries.
2 Copyright (C) 1990-2017 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
26 #include "libaout.h" /* BFD a.out internal data structures */
29 /* Swaps the information in an executable header taken from a raw byte
30 stream memory image, into the internal exec_header structure. */
32 os9k_swap_exec_header_in (bfd *abfd,
34 struct internal_exec *execp)
36 mh_com *bytes = (mh_com *) raw_bytes;
37 unsigned int dload, dmemsize, dmemstart;
39 /* Now fill in fields in the execp, from the bytes in the raw data. */
40 execp->a_info = H_GET_16 (abfd, bytes->m_sync);
42 execp->a_entry = H_GET_32 (abfd, bytes->m_exec);
47 dload = H_GET_32 (abfd, bytes->m_idata);
48 execp->a_data = dload + 8;
50 if (bfd_seek (abfd, (file_ptr) dload, SEEK_SET) != 0
51 || (bfd_bread (&dmemstart, (bfd_size_type) sizeof (dmemstart), abfd)
52 != sizeof (dmemstart))
53 || (bfd_bread (&dmemsize, (bfd_size_type) sizeof (dmemsize), abfd)
54 != sizeof (dmemsize)))
58 execp->a_dload = H_GET_32 (abfd, (unsigned char *) &dmemstart);
59 execp->a_text = dload - execp->a_tload;
60 execp->a_data = H_GET_32 (abfd, (unsigned char *) &dmemsize);
61 execp->a_bss = H_GET_32 (abfd, bytes->m_data) - execp->a_data;
70 /* Finish up the opening of a b.out file for reading. Fill in all the
71 fields that are not handled by common code. */
73 static const bfd_target *
74 os9k_callback (bfd *abfd)
76 struct internal_exec *execp = exec_hdr (abfd);
77 unsigned long bss_start;
79 /* Architecture and machine type. */
80 bfd_set_arch_mach (abfd, bfd_arch_i386, 0);
82 /* The positions of the string table and symbol table. */
83 obj_str_filepos (abfd) = 0;
84 obj_sym_filepos (abfd) = 0;
86 /* The alignments of the sections. */
87 obj_textsec (abfd)->alignment_power = execp->a_talign;
88 obj_datasec (abfd)->alignment_power = execp->a_dalign;
89 obj_bsssec (abfd)->alignment_power = execp->a_balign;
91 /* The starting addresses of the sections. */
92 obj_textsec (abfd)->vma = execp->a_tload;
93 obj_datasec (abfd)->vma = execp->a_dload;
95 /* And reload the sizes, since the aout module zaps them. */
96 obj_textsec (abfd)->size = execp->a_text;
98 bss_start = execp->a_dload + execp->a_data; /* BSS = end of data section. */
99 obj_bsssec (abfd)->vma = align_power (bss_start, execp->a_balign);
101 /* The file positions of the sections. */
102 obj_textsec (abfd)->filepos = execp->a_entry;
103 obj_datasec (abfd)->filepos = execp->a_dload;
105 /* The file positions of the relocation info ***
106 obj_textsec (abfd)->rel_filepos = N_TROFF (execp);
107 obj_datasec (abfd)->rel_filepos = N_DROFF (execp); */
109 adata (abfd).page_size = 1; /* Not applicable. */
110 adata (abfd).segment_size = 1;/* Not applicable. */
111 adata (abfd).exec_bytes_size = MHCOM_BYTES_SIZE;
116 static const bfd_target *
117 os9k_object_p (bfd *abfd)
119 struct internal_exec anexec;
122 if (bfd_bread (&exec_bytes, (bfd_size_type) MHCOM_BYTES_SIZE, abfd)
125 if (bfd_get_error () != bfd_error_system_call)
126 bfd_set_error (bfd_error_wrong_format);
130 anexec.a_info = H_GET_16 (abfd, exec_bytes.m_sync);
131 if (N_BADMAG (&anexec))
133 bfd_set_error (bfd_error_wrong_format);
137 if (! os9k_swap_exec_header_in (abfd, &exec_bytes, &anexec))
139 if (bfd_get_error () != bfd_error_system_call)
140 bfd_set_error (bfd_error_wrong_format);
143 return aout_32_some_aout_object_p (abfd, &anexec, os9k_callback);
147 os9k_sizeof_headers (bfd *abfd ATTRIBUTE_UNUSED,
148 struct bfd_link_info *info ATTRIBUTE_UNUSED)
150 return sizeof (struct internal_exec);
155 #define aout_32_close_and_cleanup aout_32_bfd_free_cached_info
157 #define aout_32_find_line _bfd_nosymbols_find_line
158 #define aout_32_get_symbol_version_string \
159 _bfd_nosymbols_get_symbol_version_string
160 #define aout_32_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
162 #define aout_32_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
163 #define aout_32_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
165 #define aout_32_get_section_contents_in_window \
166 _bfd_generic_get_section_contents_in_window
168 #define os9k_bfd_get_relocated_section_contents \
169 bfd_generic_get_relocated_section_contents
170 #define os9k_bfd_relax_section bfd_generic_relax_section
171 #define os9k_bfd_gc_sections bfd_generic_gc_sections
172 #define os9k_bfd_lookup_section_flags bfd_generic_lookup_section_flags
173 #define os9k_bfd_merge_sections bfd_generic_merge_sections
174 #define os9k_bfd_is_group_section bfd_generic_is_group_section
175 #define os9k_bfd_discard_group bfd_generic_discard_group
176 #define os9k_section_already_linked \
177 _bfd_generic_section_already_linked
178 #define os9k_bfd_define_common_symbol bfd_generic_define_common_symbol
179 #define os9k_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
180 #define os9k_bfd_link_add_symbols _bfd_generic_link_add_symbols
181 #define os9k_bfd_link_just_syms _bfd_generic_link_just_syms
182 #define os9k_bfd_copy_link_hash_symbol_type \
183 _bfd_generic_copy_link_hash_symbol_type
184 #define os9k_bfd_final_link _bfd_generic_final_link
185 #define os9k_bfd_link_split_section _bfd_generic_link_split_section
186 #define os9k_bfd_link_check_relocs _bfd_generic_link_check_relocs
188 const bfd_target i386_aout_os9k_vec =
190 "i386os9k", /* name */
191 bfd_target_os9k_flavour,
192 BFD_ENDIAN_LITTLE, /* data byte order is little */
193 BFD_ENDIAN_LITTLE, /* hdr byte order is little */
194 (HAS_RELOC | EXEC_P | WP_TEXT), /* object flags */
195 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD), /* section flags */
196 0, /* symbol leading char */
197 ' ', /* ar_pad_char */
198 16, /* ar_max_namelen */
199 0, /* match priority. */
201 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
202 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
203 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
204 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
205 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
206 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
207 {_bfd_dummy_target, os9k_object_p, /* bfd_check_format */
208 bfd_generic_archive_p, _bfd_dummy_target},
209 {bfd_false, bfd_false, /* bfd_set_format */
210 _bfd_generic_mkarchive, bfd_false},
211 {bfd_false, bfd_false, /* bfd_write_contents */
212 _bfd_write_archive_contents, bfd_false},
214 BFD_JUMP_TABLE_GENERIC (aout_32),
215 BFD_JUMP_TABLE_COPY (_bfd_generic),
216 BFD_JUMP_TABLE_CORE (_bfd_nocore),
217 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd),
218 BFD_JUMP_TABLE_SYMBOLS (aout_32),
219 BFD_JUMP_TABLE_RELOCS (aout_32),
220 BFD_JUMP_TABLE_WRITE (aout_32),
221 BFD_JUMP_TABLE_LINK (os9k),
222 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),