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252b5132 | 1 | /* BFD back-end for Motorola 88000 COFF "Binary Compatability Standard" files. |
dc810e39 AM |
2 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1997, 1998, 1999, 2000, |
3 | 2001 | |
5f771d47 | 4 | Free Software Foundation, Inc. |
252b5132 RH |
5 | Written by Cygnus Support. |
6 | ||
7 | This file is part of BFD, the Binary File Descriptor library. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
22 | ||
23 | #define M88 1 /* Customize various include files */ | |
24 | #include "bfd.h" | |
25 | #include "sysdep.h" | |
26 | #include "libbfd.h" | |
27 | #include "coff/m88k.h" | |
28 | #include "coff/internal.h" | |
29 | #include "libcoff.h" | |
30 | ||
31 | static boolean m88k_is_local_label_name PARAMS ((bfd *, const char *)); | |
32 | static bfd_reloc_status_type m88k_special_reloc | |
33 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
34 | static void rtype2howto PARAMS ((arelent *, struct internal_reloc *)); | |
35 | static void reloc_processing | |
36 | PARAMS ((arelent *, struct internal_reloc *, asymbol **, bfd *, asection *)); | |
37 | ||
38 | #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (3) | |
39 | ||
dc810e39 AM |
40 | #define GET_SCNHDR_NRELOC H_GET_32 |
41 | #define GET_SCNHDR_NLNNO H_GET_32 | |
252b5132 RH |
42 | |
43 | /* On coff-m88k, local labels start with '@'. */ | |
44 | ||
45 | #define coff_bfd_is_local_label_name m88k_is_local_label_name | |
46 | ||
47 | static boolean | |
48 | m88k_is_local_label_name (abfd, name) | |
5f771d47 | 49 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
50 | const char *name; |
51 | { | |
52 | return name[0] == '@'; | |
53 | } | |
54 | ||
b48499ec | 55 | static bfd_reloc_status_type |
252b5132 RH |
56 | m88k_special_reloc (abfd, reloc_entry, symbol, data, |
57 | input_section, output_bfd, error_message) | |
58 | bfd *abfd; | |
59 | arelent *reloc_entry; | |
60 | asymbol *symbol; | |
61 | PTR data; | |
62 | asection *input_section; | |
63 | bfd *output_bfd; | |
5f771d47 | 64 | char **error_message ATTRIBUTE_UNUSED; |
252b5132 RH |
65 | { |
66 | reloc_howto_type *howto = reloc_entry->howto; | |
67 | ||
68 | switch (howto->type) | |
69 | { | |
70 | case R_HVRT16: | |
71 | case R_LVRT16: | |
72 | if (output_bfd != (bfd *) NULL) | |
73 | { | |
74 | /* This is a partial relocation, and we want to apply the | |
75 | relocation to the reloc entry rather than the raw data. | |
76 | Modify the reloc inplace to reflect what we now know. */ | |
77 | ||
78 | reloc_entry->address += input_section->output_offset; | |
79 | } | |
80 | else | |
81 | { | |
82 | bfd_vma output_base = 0; | |
83 | bfd_vma addr = reloc_entry->address; | |
84 | bfd_vma x = bfd_get_16 (abfd, (bfd_byte *) data + addr); | |
85 | asection *reloc_target_output_section; | |
86 | long relocation = 0; | |
87 | ||
88 | /* Work out which section the relocation is targetted at and the | |
89 | initial relocation command value. */ | |
90 | ||
91 | /* Get symbol value. (Common symbols are special.) */ | |
92 | if (bfd_is_com_section (symbol->section)) | |
93 | relocation = 0; | |
94 | else | |
95 | relocation = symbol->value; | |
96 | ||
97 | reloc_target_output_section = symbol->section->output_section; | |
98 | ||
99 | /* Convert input-section-relative symbol value to absolute. */ | |
100 | if (output_bfd) | |
101 | output_base = 0; | |
102 | else | |
103 | output_base = reloc_target_output_section->vma; | |
104 | ||
105 | relocation += output_base + symbol->section->output_offset; | |
106 | ||
107 | /* Add in supplied addend. */ | |
108 | relocation += ((reloc_entry->addend << howto->bitsize) + x); | |
109 | ||
110 | reloc_entry->addend = 0; | |
111 | ||
112 | relocation >>= (bfd_vma) howto->rightshift; | |
113 | ||
114 | /* Shift everything up to where it's going to be used */ | |
115 | ||
116 | relocation <<= (bfd_vma) howto->bitpos; | |
117 | ||
118 | if (relocation) | |
dc810e39 AM |
119 | bfd_put_16 (abfd, (bfd_vma) relocation, |
120 | (unsigned char *) data + addr); | |
252b5132 RH |
121 | } |
122 | ||
123 | /* If we are not producing relocateable output, return an error if | |
124 | the symbol is not defined. */ | |
125 | if (bfd_is_und_section (symbol->section) && output_bfd == (bfd *) NULL) | |
126 | return bfd_reloc_undefined; | |
127 | ||
128 | return bfd_reloc_ok; | |
129 | ||
130 | default: | |
131 | if (output_bfd != (bfd *) NULL) | |
132 | { | |
133 | /* This is a partial relocation, and we want to apply the | |
134 | relocation to the reloc entry rather than the raw data. | |
135 | Modify the reloc inplace to reflect what we now know. */ | |
136 | ||
137 | reloc_entry->address += input_section->output_offset; | |
138 | return bfd_reloc_ok; | |
139 | } | |
140 | break; | |
141 | } | |
142 | ||
143 | if (output_bfd == (bfd *) NULL) | |
144 | return bfd_reloc_continue; | |
145 | ||
146 | return bfd_reloc_ok; | |
147 | } | |
148 | ||
b48499ec | 149 | static reloc_howto_type howto_table[] = |
252b5132 RH |
150 | { |
151 | HOWTO (R_PCR16L, /* type */ | |
152 | 02, /* rightshift */ | |
153 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
154 | 16, /* bitsize */ | |
155 | true, /* pc_relative */ | |
156 | 0, /* bitpos */ | |
157 | complain_overflow_signed, /* complain_on_overflow */ | |
158 | m88k_special_reloc, /* special_function */ | |
159 | "PCR16L", /* name */ | |
160 | false, /* partial_inplace */ | |
161 | 0x0000ffff, /* src_mask */ | |
162 | 0x0000ffff, /* dst_mask */ | |
163 | true), /* pcrel_offset */ | |
164 | ||
165 | HOWTO (R_PCR26L, /* type */ | |
166 | 02, /* rightshift */ | |
167 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
168 | 26, /* bitsize */ | |
169 | true, /* pc_relative */ | |
170 | 0, /* bitpos */ | |
171 | complain_overflow_signed, /* complain_on_overflow */ | |
172 | m88k_special_reloc, /* special_function */ | |
173 | "PCR26L", /* name */ | |
174 | false, /* partial_inplace */ | |
175 | 0x03ffffff, /* src_mask */ | |
176 | 0x03ffffff, /* dst_mask */ | |
177 | true), /* pcrel_offset */ | |
178 | ||
179 | HOWTO (R_VRT16, /* type */ | |
180 | 00, /* rightshift */ | |
181 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
182 | 16, /* bitsize */ | |
183 | false, /* pc_relative */ | |
184 | 0, /* bitpos */ | |
185 | complain_overflow_bitfield, /* complain_on_overflow */ | |
186 | m88k_special_reloc, /* special_function */ | |
187 | "VRT16", /* name */ | |
188 | false, /* partial_inplace */ | |
189 | 0x0000ffff, /* src_mask */ | |
190 | 0x0000ffff, /* dst_mask */ | |
191 | true), /* pcrel_offset */ | |
192 | ||
193 | HOWTO (R_HVRT16, /* type */ | |
194 | 16, /* rightshift */ | |
195 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
196 | 16, /* bitsize */ | |
197 | false, /* pc_relative */ | |
198 | 0, /* bitpos */ | |
199 | complain_overflow_dont, /* complain_on_overflow */ | |
200 | m88k_special_reloc, /* special_function */ | |
201 | "HVRT16", /* name */ | |
202 | false, /* partial_inplace */ | |
203 | 0x0000ffff, /* src_mask */ | |
204 | 0x0000ffff, /* dst_mask */ | |
205 | true), /* pcrel_offset */ | |
206 | ||
207 | HOWTO (R_LVRT16, /* type */ | |
208 | 00, /* rightshift */ | |
209 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
210 | 16, /* bitsize */ | |
211 | false, /* pc_relative */ | |
212 | 0, /* bitpos */ | |
213 | complain_overflow_dont, /* complain_on_overflow */ | |
214 | m88k_special_reloc, /* special_function */ | |
215 | "LVRT16", /* name */ | |
216 | false, /* partial_inplace */ | |
217 | 0x0000ffff, /* src_mask */ | |
218 | 0x0000ffff, /* dst_mask */ | |
219 | true), /* pcrel_offset */ | |
220 | ||
221 | HOWTO (R_VRT32, /* type */ | |
222 | 00, /* rightshift */ | |
223 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
224 | 32, /* bitsize */ | |
225 | false, /* pc_relative */ | |
226 | 0, /* bitpos */ | |
227 | complain_overflow_bitfield, /* complain_on_overflow */ | |
228 | m88k_special_reloc, /* special_function */ | |
229 | "VRT32", /* name */ | |
230 | false, /* partial_inplace */ | |
231 | 0xffffffff, /* src_mask */ | |
232 | 0xffffffff, /* dst_mask */ | |
233 | true), /* pcrel_offset */ | |
234 | }; | |
235 | ||
236 | /* Code to turn an external r_type into a pointer to an entry in the | |
237 | above howto table. */ | |
238 | static void | |
239 | rtype2howto (cache_ptr, dst) | |
240 | arelent *cache_ptr; | |
241 | struct internal_reloc *dst; | |
242 | { | |
243 | if (dst->r_type >= R_PCR16L && dst->r_type <= R_VRT32) | |
244 | { | |
245 | cache_ptr->howto = howto_table + dst->r_type - R_PCR16L; | |
246 | } | |
247 | else | |
248 | { | |
249 | BFD_ASSERT (0); | |
250 | } | |
251 | } | |
252 | ||
253 | #define RTYPE2HOWTO(cache_ptr, dst) rtype2howto (cache_ptr, dst) | |
254 | ||
252b5132 | 255 | /* Code to swap in the reloc offset */ |
dc810e39 AM |
256 | #define SWAP_IN_RELOC_OFFSET H_GET_16 |
257 | #define SWAP_OUT_RELOC_OFFSET H_PUT_16 | |
252b5132 | 258 | |
252b5132 RH |
259 | #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \ |
260 | reloc_processing(relent, reloc, symbols, abfd, section) | |
261 | ||
262 | static void | |
263 | reloc_processing (relent, reloc, symbols, abfd, section) | |
264 | arelent *relent; | |
265 | struct internal_reloc *reloc; | |
266 | asymbol **symbols; | |
267 | bfd *abfd; | |
268 | asection *section; | |
269 | { | |
270 | relent->address = reloc->r_vaddr; | |
271 | rtype2howto (relent, reloc); | |
272 | ||
273 | if (((int) reloc->r_symndx) > 0) | |
274 | { | |
275 | relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx]; | |
276 | } | |
277 | else | |
278 | { | |
279 | relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; | |
280 | } | |
281 | ||
282 | relent->addend = reloc->r_offset; | |
283 | relent->address -= section->vma; | |
284 | } | |
285 | ||
286 | #define BADMAG(x) MC88BADMAG(x) | |
287 | #include "coffcode.h" | |
288 | ||
289 | #undef coff_write_armap | |
290 | ||
8a70eff3 | 291 | CREATE_BIG_COFF_TARGET_VEC (m88kbcs_vec, "coff-m88kbcs", 0, 0, '_', NULL) |