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154a1ee5 TG |
1 | /* Intel i386 Mach-O support for BFD. |
2 | Copyright 2009 | |
3 | Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
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. | |
11 | ||
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. | |
16 | ||
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. */ | |
21 | ||
22 | #include "sysdep.h" | |
23 | #include "mach-o.h" | |
24 | #include "bfd.h" | |
25 | #include "libbfd.h" | |
26 | #include "libiberty.h" | |
27 | ||
28 | #define bfd_mach_o_object_p bfd_mach_o_i386_object_p | |
29 | #define bfd_mach_o_core_p bfd_mach_o_i386_core_p | |
30 | #define bfd_mach_o_mkobject bfd_mach_o_i386_mkobject | |
31 | ||
32 | static const bfd_target * | |
33 | bfd_mach_o_i386_object_p (bfd *abfd) | |
34 | { | |
35 | return bfd_mach_o_header_p (abfd, 0, BFD_MACH_O_CPU_TYPE_I386); | |
36 | } | |
37 | ||
38 | static const bfd_target * | |
39 | bfd_mach_o_i386_core_p (bfd *abfd) | |
40 | { | |
41 | return bfd_mach_o_header_p (abfd, | |
42 | BFD_MACH_O_MH_CORE, BFD_MACH_O_CPU_TYPE_I386); | |
43 | } | |
44 | ||
45 | static bfd_boolean | |
46 | bfd_mach_o_i386_mkobject (bfd *abfd) | |
47 | { | |
48 | bfd_mach_o_data_struct *mdata; | |
49 | ||
50 | if (!bfd_mach_o_mkobject_init (abfd)) | |
51 | return FALSE; | |
52 | ||
53 | mdata = abfd->tdata.mach_o_data; | |
54 | mdata->header.magic = BFD_MACH_O_MH_MAGIC; | |
55 | mdata->header.cputype = BFD_MACH_O_CPU_TYPE_I386; | |
56 | mdata->header.cpusubtype = BFD_MACH_O_CPU_SUBTYPE_X86_ALL; | |
154a1ee5 TG |
57 | mdata->header.byteorder = BFD_ENDIAN_LITTLE; |
58 | mdata->header.version = 1; | |
59 | ||
60 | return TRUE; | |
61 | } | |
62 | ||
92bc0e80 TG |
63 | static reloc_howto_type i386_howto_table[]= |
64 | { | |
65 | HOWTO(BFD_RELOC_32, 0, 2, 32, FALSE, 0, | |
66 | complain_overflow_bitfield, | |
67 | NULL, "32", | |
68 | FALSE, 0xffffffff, 0xffffffff, FALSE), | |
69 | HOWTO(BFD_RELOC_16, 0, 1, 16, FALSE, 0, | |
70 | complain_overflow_bitfield, | |
71 | NULL, "16", | |
72 | FALSE, 0xffff, 0xffff, FALSE), | |
73 | HOWTO(BFD_RELOC_8, 0, 0, 8, FALSE, 0, | |
74 | complain_overflow_bitfield, | |
75 | NULL, "8", | |
76 | FALSE, 0xff, 0xff, FALSE), | |
77 | HOWTO(BFD_RELOC_32_PCREL, 0, 2, 32, TRUE, 0, | |
78 | complain_overflow_bitfield, | |
79 | NULL, "DISP32", | |
80 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
81 | HOWTO(BFD_RELOC_16_PCREL, 0, 1, 16, TRUE, 0, | |
82 | complain_overflow_bitfield, | |
83 | NULL, "DISP16", | |
84 | FALSE, 0xffff, 0xffff, TRUE), | |
85 | HOWTO(BFD_RELOC_MACH_O_SECTDIFF, 0, 2, 32, FALSE, 0, | |
86 | complain_overflow_bitfield, | |
87 | NULL, "SECTDIFF_32", | |
88 | FALSE, 0xffffffff, 0xffffffff, FALSE), | |
89 | HOWTO(BFD_RELOC_MACH_O_PAIR, 0, 2, 32, FALSE, 0, | |
90 | complain_overflow_bitfield, | |
91 | NULL, "PAIR_32", | |
92 | FALSE, 0xffffffff, 0xffffffff, FALSE), | |
93 | }; | |
94 | ||
95 | static bfd_boolean | |
96 | bfd_mach_o_i386_swap_reloc_in (arelent *res, bfd_mach_o_reloc_info *reloc) | |
97 | { | |
98 | if (reloc->r_scattered) | |
99 | { | |
100 | switch (reloc->r_type) | |
101 | { | |
102 | case BFD_MACH_O_GENERIC_RELOC_PAIR: | |
103 | if (reloc->r_length != 2) | |
104 | return FALSE; | |
105 | res->howto = &i386_howto_table[3]; | |
106 | res->address = res[-1].address; | |
107 | return TRUE; | |
108 | case BFD_MACH_O_GENERIC_RELOC_SECTDIFF: | |
109 | case BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF: | |
110 | if (reloc->r_length != 2) | |
111 | return FALSE; | |
112 | res->howto = &i386_howto_table[2]; | |
113 | return TRUE; | |
114 | default: | |
115 | return FALSE; | |
116 | } | |
117 | } | |
118 | else | |
119 | { | |
120 | switch (reloc->r_type) | |
121 | { | |
122 | case BFD_MACH_O_GENERIC_RELOC_VANILLA: | |
123 | switch ((reloc->r_length << 1) | reloc->r_pcrel) | |
124 | { | |
125 | case 0: /* len = 0, pcrel = 0 */ | |
126 | res->howto = &i386_howto_table[2]; | |
127 | return TRUE; | |
128 | case 2: /* len = 1, pcrel = 0 */ | |
129 | res->howto = &i386_howto_table[1]; | |
130 | return TRUE; | |
131 | case 3: /* len = 1, pcrel = 1 */ | |
132 | res->howto = &i386_howto_table[4]; | |
133 | return TRUE; | |
134 | case 4: /* len = 2, pcrel = 0 */ | |
135 | res->howto = &i386_howto_table[0]; | |
136 | return TRUE; | |
137 | case 5: /* len = 2, pcrel = 1 */ | |
138 | res->howto = &i386_howto_table[3]; | |
139 | return TRUE; | |
140 | default: | |
141 | return FALSE; | |
142 | } | |
143 | break; | |
144 | default: | |
145 | return FALSE; | |
146 | } | |
147 | } | |
148 | } | |
149 | ||
150 | static bfd_boolean | |
151 | bfd_mach_o_i386_swap_reloc_out (arelent *rel, bfd_mach_o_reloc_info *rinfo) | |
152 | { | |
153 | rinfo->r_address = rel->address; | |
154 | switch (rel->howto->type) | |
155 | { | |
156 | case BFD_RELOC_32: | |
157 | case BFD_RELOC_32_PCREL: | |
158 | case BFD_RELOC_16: | |
159 | case BFD_RELOC_16_PCREL: | |
160 | case BFD_RELOC_8: | |
161 | rinfo->r_scattered = 0; | |
162 | rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_VANILLA; | |
163 | rinfo->r_pcrel = rel->howto->pc_relative; | |
164 | rinfo->r_length = rel->howto->size; /* Correct in practice. */ | |
165 | if ((*rel->sym_ptr_ptr)->flags & BSF_SECTION_SYM) | |
166 | { | |
167 | rinfo->r_extern = 0; | |
168 | rinfo->r_value = (*rel->sym_ptr_ptr)->section->target_index; | |
169 | } | |
170 | else | |
171 | { | |
172 | rinfo->r_extern = 1; | |
173 | rinfo->r_value = (*rel->sym_ptr_ptr)->udata.i; | |
174 | } | |
175 | break; | |
176 | case BFD_RELOC_MACH_O_SECTDIFF: | |
177 | rinfo->r_scattered = 1; | |
178 | rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_SECTDIFF; | |
179 | rinfo->r_pcrel = 0; | |
180 | rinfo->r_length = 2; | |
181 | rinfo->r_extern = 0; | |
182 | rinfo->r_value = (*rel->sym_ptr_ptr)->value | |
183 | + (*rel->sym_ptr_ptr)->section->vma; | |
184 | break; | |
185 | case BFD_RELOC_MACH_O_PAIR: | |
186 | rinfo->r_address = 0; | |
187 | rinfo->r_scattered = 1; | |
188 | rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_PAIR; | |
189 | rinfo->r_pcrel = 0; | |
190 | rinfo->r_length = 2; | |
191 | rinfo->r_extern = 0; | |
192 | rinfo->r_value = (*rel->sym_ptr_ptr)->value | |
193 | + (*rel->sym_ptr_ptr)->section->vma; | |
194 | break; | |
195 | default: | |
196 | return FALSE; | |
197 | } | |
198 | return TRUE; | |
199 | } | |
200 | ||
201 | static reloc_howto_type * | |
202 | bfd_mach_o_i386_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
203 | bfd_reloc_code_real_type code) | |
204 | { | |
205 | unsigned int i; | |
206 | ||
207 | for (i = 0; i < sizeof (i386_howto_table) / sizeof (*i386_howto_table); i++) | |
208 | if (code == i386_howto_table[i].type) | |
209 | return &i386_howto_table[i]; | |
210 | return NULL; | |
211 | } | |
212 | ||
213 | static reloc_howto_type * | |
214 | bfd_mach_o_i386_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
215 | const char *name ATTRIBUTE_UNUSED) | |
216 | { | |
217 | return NULL; | |
218 | } | |
219 | ||
220 | #define bfd_mach_o_swap_reloc_in bfd_mach_o_i386_swap_reloc_in | |
221 | #define bfd_mach_o_swap_reloc_out bfd_mach_o_i386_swap_reloc_out | |
222 | ||
223 | #define bfd_mach_o_bfd_reloc_type_lookup bfd_mach_o_i386_bfd_reloc_type_lookup | |
224 | #define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_i386_bfd_reloc_name_lookup | |
225 | ||
154a1ee5 TG |
226 | #define TARGET_NAME mach_o_i386_vec |
227 | #define TARGET_STRING "mach-o-i386" | |
228 | #define TARGET_BIG_ENDIAN 0 | |
229 | #define TARGET_ARCHIVE 0 | |
154a1ee5 | 230 | #include "mach-o-target.c" |