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1 | /* BFD back-end for Zilog Z800n COFF binaries. | |
2 | Copyright 1992, 1993, 1994, 1995, 1997, 1999, 2000, 2001, 2002, 2003, | |
3 | 2004, 2005, 2007 Free Software Foundation, Inc. | |
4 | Contributed by Cygnus Support. | |
5 | Written by Steve Chamberlain, <sac@cygnus.com>. | |
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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ | |
22 | ||
23 | #include "bfd.h" | |
24 | #include "sysdep.h" | |
25 | #include "libbfd.h" | |
26 | #include "bfdlink.h" | |
27 | #include "coff/z8k.h" | |
28 | #include "coff/internal.h" | |
29 | #include "libcoff.h" | |
30 | ||
31 | #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1) | |
32 | ||
33 | static reloc_howto_type r_imm32 = | |
34 | HOWTO (R_IMM32, 0, 2, 32, FALSE, 0, | |
35 | complain_overflow_bitfield, 0, "r_imm32", TRUE, 0xffffffff, | |
36 | 0xffffffff, FALSE); | |
37 | ||
38 | static reloc_howto_type r_imm4l = | |
39 | HOWTO (R_IMM4L, 0, 0, 4, FALSE, 0, | |
40 | complain_overflow_bitfield, 0, "r_imm4l", TRUE, 0xf, 0xf, FALSE); | |
41 | ||
42 | static reloc_howto_type r_da = | |
43 | HOWTO (R_IMM16, 0, 1, 16, FALSE, 0, | |
44 | complain_overflow_bitfield, 0, "r_da", TRUE, 0x0000ffff, 0x0000ffff, | |
45 | FALSE); | |
46 | ||
47 | static reloc_howto_type r_imm8 = | |
48 | HOWTO (R_IMM8, 0, 0, 8, FALSE, 0, | |
49 | complain_overflow_bitfield, 0, "r_imm8", TRUE, 0x000000ff, 0x000000ff, | |
50 | FALSE); | |
51 | ||
52 | static reloc_howto_type r_rel16 = | |
53 | HOWTO (R_REL16, 0, 1, 16, FALSE, 0, | |
54 | complain_overflow_bitfield, 0, "r_rel16", TRUE, 0x0000ffff, 0x0000ffff, | |
55 | TRUE); | |
56 | ||
57 | static reloc_howto_type r_jr = | |
58 | HOWTO (R_JR, 1, 0, 8, TRUE, 0, complain_overflow_signed, 0, | |
59 | "r_jr", TRUE, 0xff, 0xff, TRUE); | |
60 | ||
61 | static reloc_howto_type r_disp7 = | |
62 | HOWTO (R_DISP7, 0, 0, 7, TRUE, 0, complain_overflow_bitfield, 0, | |
63 | "r_disp7", TRUE, 0x7f, 0x7f, TRUE); | |
64 | ||
65 | static reloc_howto_type r_callr = | |
66 | HOWTO (R_CALLR, 1, 1, 12, TRUE, 0, complain_overflow_signed, 0, | |
67 | "r_callr", TRUE, 0xfff, 0xfff, TRUE); | |
68 | ||
69 | #define BADMAG(x) Z8KBADMAG(x) | |
70 | #define Z8K 1 /* Customize coffcode.h. */ | |
71 | #define __A_MAGIC_SET__ | |
72 | ||
73 | /* Code to swap in the reloc. */ | |
74 | #define SWAP_IN_RELOC_OFFSET H_GET_32 | |
75 | #define SWAP_OUT_RELOC_OFFSET H_PUT_32 | |
76 | #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \ | |
77 | dst->r_stuff[0] = 'S'; \ | |
78 | dst->r_stuff[1] = 'C'; | |
79 | ||
80 | /* Code to turn a r_type into a howto ptr, uses the above howto table. */ | |
81 | ||
82 | static void | |
83 | rtype2howto (arelent *internal, struct internal_reloc *dst) | |
84 | { | |
85 | switch (dst->r_type) | |
86 | { | |
87 | default: | |
88 | abort (); | |
89 | break; | |
90 | case R_IMM8: | |
91 | internal->howto = &r_imm8; | |
92 | break; | |
93 | case R_IMM16: | |
94 | internal->howto = &r_da; | |
95 | break; | |
96 | case R_JR: | |
97 | internal->howto = &r_jr; | |
98 | break; | |
99 | case R_DISP7: | |
100 | internal->howto = &r_disp7; | |
101 | break; | |
102 | case R_CALLR: | |
103 | internal->howto = &r_callr; | |
104 | break; | |
105 | case R_REL16: | |
106 | internal->howto = &r_rel16; | |
107 | break; | |
108 | case R_IMM32: | |
109 | internal->howto = &r_imm32; | |
110 | break; | |
111 | case R_IMM4L: | |
112 | internal->howto = &r_imm4l; | |
113 | break; | |
114 | } | |
115 | } | |
116 | ||
117 | #define RTYPE2HOWTO(internal, relocentry) rtype2howto (internal, relocentry) | |
118 | ||
119 | static reloc_howto_type * | |
120 | coff_z8k_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
121 | bfd_reloc_code_real_type code) | |
122 | { | |
123 | switch (code) | |
124 | { | |
125 | case BFD_RELOC_8: return & r_imm8; | |
126 | case BFD_RELOC_16: return & r_da; | |
127 | case BFD_RELOC_32: return & r_imm32; | |
128 | case BFD_RELOC_8_PCREL: return & r_jr; | |
129 | case BFD_RELOC_16_PCREL: return & r_rel16; | |
130 | case BFD_RELOC_Z8K_DISP7: return & r_disp7; | |
131 | case BFD_RELOC_Z8K_CALLR: return & r_callr; | |
132 | case BFD_RELOC_Z8K_IMM4L: return & r_imm4l; | |
133 | default: BFD_FAIL (); | |
134 | return 0; | |
135 | } | |
136 | } | |
137 | ||
138 | static reloc_howto_type * | |
139 | coff_z8k_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
140 | const char *r_name) | |
141 | { | |
142 | if (strcasecmp (r_imm8.name, r_name) == 0) | |
143 | return &r_imm8; | |
144 | if (strcasecmp (r_da.name, r_name) == 0) | |
145 | return &r_da; | |
146 | if (strcasecmp (r_imm32.name, r_name) == 0) | |
147 | return &r_imm32; | |
148 | if (strcasecmp (r_jr.name, r_name) == 0) | |
149 | return &r_jr; | |
150 | if (strcasecmp (r_rel16.name, r_name) == 0) | |
151 | return &r_rel16; | |
152 | if (strcasecmp (r_disp7.name, r_name) == 0) | |
153 | return &r_disp7; | |
154 | if (strcasecmp (r_callr.name, r_name) == 0) | |
155 | return &r_callr; | |
156 | if (strcasecmp (r_imm4l.name, r_name) == 0) | |
157 | return &r_imm4l; | |
158 | ||
159 | return NULL; | |
160 | } | |
161 | ||
162 | /* Perform any necessary magic to the addend in a reloc entry. */ | |
163 | ||
164 | #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \ | |
165 | cache_ptr->addend = ext_reloc.r_offset; | |
166 | ||
167 | #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \ | |
168 | reloc_processing(relent, reloc, symbols, abfd, section) | |
169 | ||
170 | static void | |
171 | reloc_processing (arelent *relent, | |
172 | struct internal_reloc *reloc, | |
173 | asymbol **symbols, | |
174 | bfd *abfd, | |
175 | asection *section) | |
176 | { | |
177 | relent->address = reloc->r_vaddr; | |
178 | rtype2howto (relent, reloc); | |
179 | ||
180 | if (reloc->r_symndx > 0) | |
181 | relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx]; | |
182 | else | |
183 | relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; | |
184 | ||
185 | relent->addend = reloc->r_offset; | |
186 | relent->address -= section->vma; | |
187 | } | |
188 | ||
189 | static void | |
190 | extra_case (bfd *in_abfd, | |
191 | struct bfd_link_info *link_info, | |
192 | struct bfd_link_order *link_order, | |
193 | arelent *reloc, | |
194 | bfd_byte *data, | |
195 | unsigned int *src_ptr, | |
196 | unsigned int *dst_ptr) | |
197 | { | |
198 | asection * input_section = link_order->u.indirect.section; | |
199 | ||
200 | switch (reloc->howto->type) | |
201 | { | |
202 | case R_IMM8: | |
203 | bfd_put_8 (in_abfd, | |
204 | bfd_coff_reloc16_get_value (reloc, link_info, input_section), | |
205 | data + *dst_ptr); | |
206 | (*dst_ptr) += 1; | |
207 | (*src_ptr) += 1; | |
208 | break; | |
209 | ||
210 | case R_IMM32: | |
211 | /* If no flags are set, assume immediate value. */ | |
212 | if (! (*reloc->sym_ptr_ptr)->section->flags) | |
213 | { | |
214 | bfd_put_32 (in_abfd, | |
215 | bfd_coff_reloc16_get_value (reloc, link_info, | |
216 | input_section), | |
217 | data + *dst_ptr); | |
218 | } | |
219 | else | |
220 | { | |
221 | bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, | |
222 | input_section); | |
223 | /* Addresses are 23 bit, and the layout of those in a 32-bit | |
224 | value is as follows: | |
225 | 1AAAAAAA xxxxxxxx AAAAAAAA AAAAAAAA | |
226 | (A - address bits, x - ignore). */ | |
227 | dst = (dst & 0xffff) | ((dst & 0xff0000) << 8) | 0x80000000; | |
228 | bfd_put_32 (in_abfd, dst, data + *dst_ptr); | |
229 | } | |
230 | (*dst_ptr) += 4; | |
231 | (*src_ptr) += 4; | |
232 | break; | |
233 | ||
234 | case R_IMM4L: | |
235 | bfd_put_8 (in_abfd, | |
236 | ((bfd_get_8 (in_abfd, data + *dst_ptr) & 0xf0) | |
237 | | (0x0f | |
238 | & bfd_coff_reloc16_get_value (reloc, link_info, | |
239 | input_section))), | |
240 | data + *dst_ptr); | |
241 | (*dst_ptr) += 1; | |
242 | (*src_ptr) += 1; | |
243 | break; | |
244 | ||
245 | case R_IMM16: | |
246 | bfd_put_16 (in_abfd, | |
247 | bfd_coff_reloc16_get_value (reloc, link_info, input_section), | |
248 | data + *dst_ptr); | |
249 | (*dst_ptr) += 2; | |
250 | (*src_ptr) += 2; | |
251 | break; | |
252 | ||
253 | case R_JR: | |
254 | { | |
255 | bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, | |
256 | input_section); | |
257 | bfd_vma dot = (*dst_ptr | |
258 | + input_section->output_offset | |
259 | + input_section->output_section->vma); | |
260 | int gap = dst - dot - 1; /* -1, since we're in the odd byte of the | |
261 | word and the pc's been incremented. */ | |
262 | ||
263 | if (gap & 1) | |
264 | abort (); | |
265 | gap /= 2; | |
266 | if (gap > 128 || gap < -128) | |
267 | { | |
268 | if (! ((*link_info->callbacks->reloc_overflow) | |
269 | (link_info, NULL, | |
270 | bfd_asymbol_name (*reloc->sym_ptr_ptr), | |
271 | reloc->howto->name, reloc->addend, input_section->owner, | |
272 | input_section, reloc->address))) | |
273 | abort (); | |
274 | } | |
275 | bfd_put_8 (in_abfd, gap, data + *dst_ptr); | |
276 | (*dst_ptr)++; | |
277 | (*src_ptr)++; | |
278 | break; | |
279 | } | |
280 | ||
281 | case R_DISP7: | |
282 | { | |
283 | bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, | |
284 | input_section); | |
285 | bfd_vma dot = (*dst_ptr | |
286 | + input_section->output_offset | |
287 | + input_section->output_section->vma); | |
288 | int gap = dst - dot - 1; /* -1, since we're in the odd byte of the | |
289 | word and the pc's been incremented. */ | |
290 | ||
291 | if (gap & 1) | |
292 | abort (); | |
293 | gap /= 2; | |
294 | ||
295 | if (gap > 0 || gap < -127) | |
296 | { | |
297 | if (! ((*link_info->callbacks->reloc_overflow) | |
298 | (link_info, NULL, | |
299 | bfd_asymbol_name (*reloc->sym_ptr_ptr), | |
300 | reloc->howto->name, reloc->addend, input_section->owner, | |
301 | input_section, reloc->address))) | |
302 | abort (); | |
303 | } | |
304 | bfd_put_8 (in_abfd, | |
305 | (bfd_get_8 ( in_abfd, data + *dst_ptr) & 0x80) + (-gap & 0x7f), | |
306 | data + *dst_ptr); | |
307 | (*dst_ptr)++; | |
308 | (*src_ptr)++; | |
309 | break; | |
310 | } | |
311 | ||
312 | case R_CALLR: | |
313 | { | |
314 | bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, | |
315 | input_section); | |
316 | bfd_vma dot = (*dst_ptr | |
317 | + input_section->output_offset | |
318 | + input_section->output_section->vma); | |
319 | int gap = dst - dot - 2; | |
320 | ||
321 | if (gap & 1) | |
322 | abort (); | |
323 | if (gap > 4096 || gap < -4095) | |
324 | { | |
325 | if (! ((*link_info->callbacks->reloc_overflow) | |
326 | (link_info, NULL, | |
327 | bfd_asymbol_name (*reloc->sym_ptr_ptr), | |
328 | reloc->howto->name, reloc->addend, input_section->owner, | |
329 | input_section, reloc->address))) | |
330 | abort (); | |
331 | } | |
332 | gap /= 2; | |
333 | bfd_put_16 (in_abfd, | |
334 | (bfd_get_16 ( in_abfd, data + *dst_ptr) & 0xf000) | (-gap & 0x0fff), | |
335 | data + *dst_ptr); | |
336 | (*dst_ptr) += 2; | |
337 | (*src_ptr) += 2; | |
338 | break; | |
339 | } | |
340 | ||
341 | case R_REL16: | |
342 | { | |
343 | bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, | |
344 | input_section); | |
345 | bfd_vma dot = (*dst_ptr | |
346 | + input_section->output_offset | |
347 | + input_section->output_section->vma); | |
348 | int gap = dst - dot - 2; | |
349 | ||
350 | if (gap > 32767 || gap < -32768) | |
351 | { | |
352 | if (! ((*link_info->callbacks->reloc_overflow) | |
353 | (link_info, NULL, | |
354 | bfd_asymbol_name (*reloc->sym_ptr_ptr), | |
355 | reloc->howto->name, reloc->addend, input_section->owner, | |
356 | input_section, reloc->address))) | |
357 | abort (); | |
358 | } | |
359 | bfd_put_16 (in_abfd, (bfd_vma) gap, data + *dst_ptr); | |
360 | (*dst_ptr) += 2; | |
361 | (*src_ptr) += 2; | |
362 | break; | |
363 | } | |
364 | ||
365 | default: | |
366 | abort (); | |
367 | } | |
368 | } | |
369 | ||
370 | #define coff_reloc16_extra_cases extra_case | |
371 | #define coff_bfd_reloc_type_lookup coff_z8k_reloc_type_lookup | |
372 | #define coff_bfd_reloc_name_lookup coff_z8k_reloc_name_lookup | |
373 | ||
374 | #include "coffcode.h" | |
375 | ||
376 | #undef coff_bfd_get_relocated_section_contents | |
377 | #define coff_bfd_get_relocated_section_contents \ | |
378 | bfd_coff_reloc16_get_relocated_section_contents | |
379 | ||
380 | #undef coff_bfd_relax_section | |
381 | #define coff_bfd_relax_section bfd_coff_reloc16_relax_section | |
382 | ||
383 | CREATE_BIG_COFF_TARGET_VEC (z8kcoff_vec, "coff-z8k", 0, 0, '_', NULL, COFF_SWAP_TABLE) |