1 /* BFD back-end for Zilog Z800n COFF binaries.
2 Copyright 1992, 1993, 1994, 1995, 1997, 1999, 2000, 2001, 2002, 2003,
3 2004 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, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0,
59 "r_jr", TRUE, 0, 0, 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, 0, 0, TRUE);
64
65 static reloc_howto_type r_callr =
66 HOWTO (R_CALLR, 0, 1, 12, TRUE, 0, complain_overflow_signed, 0,
67 "r_callr", TRUE, 0xfff, 0xfff, TRUE);
68
69 /* Turn a howto into a reloc number */
70
71 static int
coff_z8k_select_reloc(reloc_howto_type * howto)72 coff_z8k_select_reloc (reloc_howto_type *howto)
73 {
74 return howto->type;
75 }
76
77 #define SELECT_RELOC(x,howto) x.r_type = coff_z8k_select_reloc(howto)
78
79 #define BADMAG(x) Z8KBADMAG(x)
80 #define Z8K 1 /* Customize coffcode.h */
81 #define __A_MAGIC_SET__
82
83 /* Code to swap in the reloc. */
84 #define SWAP_IN_RELOC_OFFSET H_GET_32
85 #define SWAP_OUT_RELOC_OFFSET H_PUT_32
86 #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
87 dst->r_stuff[0] = 'S'; \
88 dst->r_stuff[1] = 'C';
89
90 /* Code to turn a r_type into a howto ptr, uses the above howto table. */
91
92 static void
rtype2howto(arelent * internal,struct internal_reloc * dst)93 rtype2howto (arelent *internal, struct internal_reloc *dst)
94 {
95 switch (dst->r_type)
96 {
97 default:
98 abort ();
99 break;
100 case R_IMM8:
101 internal->howto = &r_imm8;
102 break;
103 case R_IMM16:
104 internal->howto = &r_da;
105 break;
106 case R_JR:
107 internal->howto = &r_jr;
108 break;
109 case R_DISP7:
110 internal->howto = &r_disp7;
111 break;
112 case R_CALLR:
113 internal->howto = &r_callr;
114 break;
115 case R_REL16:
116 internal->howto = &r_rel16;
117 break;
118 case R_IMM32:
119 internal->howto = &r_imm32;
120 break;
121 case R_IMM4L:
122 internal->howto = &r_imm4l;
123 break;
124 }
125 }
126
127 #define RTYPE2HOWTO(internal, relocentry) rtype2howto (internal, relocentry)
128
129 /* Perform any necessary magic to the addend in a reloc entry. */
130
131 #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
132 cache_ptr->addend = ext_reloc.r_offset;
133
134 #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
135 reloc_processing(relent, reloc, symbols, abfd, section)
136
137 static void
reloc_processing(arelent * relent,struct internal_reloc * reloc,asymbol ** symbols,bfd * abfd,asection * section)138 reloc_processing (arelent *relent,
139 struct internal_reloc *reloc,
140 asymbol **symbols,
141 bfd *abfd,
142 asection *section)
143 {
144 relent->address = reloc->r_vaddr;
145 rtype2howto (relent, reloc);
146
147 if (reloc->r_symndx > 0)
148 relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
149 else
150 relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
151
152 relent->addend = reloc->r_offset;
153 relent->address -= section->vma;
154 }
155
156 static void
extra_case(bfd * in_abfd,struct bfd_link_info * link_info,struct bfd_link_order * link_order,arelent * reloc,bfd_byte * data,unsigned int * src_ptr,unsigned int * dst_ptr)157 extra_case (bfd *in_abfd,
158 struct bfd_link_info *link_info,
159 struct bfd_link_order *link_order,
160 arelent *reloc,
161 bfd_byte *data,
162 unsigned int *src_ptr,
163 unsigned int *dst_ptr)
164 {
165 asection * input_section = link_order->u.indirect.section;
166
167 switch (reloc->howto->type)
168 {
169 case R_IMM8:
170 bfd_put_8 (in_abfd,
171 bfd_coff_reloc16_get_value (reloc, link_info, input_section),
172 data + *dst_ptr);
173 (*dst_ptr) += 1;
174 (*src_ptr) += 1;
175 break;
176
177 case R_IMM32:
178 /* If no flags are set, assume immediate value. */
179 if (! (*reloc->sym_ptr_ptr)->section->flags)
180 {
181 bfd_put_32 (in_abfd,
182 bfd_coff_reloc16_get_value (reloc, link_info,
183 input_section),
184 data + *dst_ptr);
185 }
186 else
187 {
188 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
189 input_section);
190 /* Addresses are 23 bit, and the layout of those in a 32-bit
191 value is as follows:
192 1AAAAAAA xxxxxxxx AAAAAAAA AAAAAAAA
193 (A - address bits, x - ignore). */
194 dst = (dst & 0xffff) | ((dst & 0xff0000) << 8) | 0x80000000;
195 bfd_put_32 (in_abfd, dst, data + *dst_ptr);
196 }
197 (*dst_ptr) += 4;
198 (*src_ptr) += 4;
199 break;
200
201 case R_IMM4L:
202 bfd_put_8 (in_abfd,
203 ((bfd_get_8 (in_abfd, data + *dst_ptr) & 0xf0)
204 | (0x0f
205 & bfd_coff_reloc16_get_value (reloc, link_info,
206 input_section))),
207 data + *dst_ptr);
208 (*dst_ptr) += 1;
209 (*src_ptr) += 1;
210 break;
211
212 case R_IMM16:
213 bfd_put_16 (in_abfd,
214 bfd_coff_reloc16_get_value (reloc, link_info, input_section),
215 data + *dst_ptr);
216 (*dst_ptr) += 2;
217 (*src_ptr) += 2;
218 break;
219
220 case R_JR:
221 {
222 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
223 input_section);
224 bfd_vma dot = (link_order->offset
225 + *dst_ptr
226 + input_section->output_section->vma);
227 int gap = dst - dot - 1; /* -1, since we're in the odd byte of the
228 word and the pc's been incremented. */
229
230 if (gap & 1)
231 abort ();
232 gap /= 2;
233 if (gap > 128 || gap < -128)
234 {
235 if (! ((*link_info->callbacks->reloc_overflow)
236 (link_info, NULL,
237 bfd_asymbol_name (*reloc->sym_ptr_ptr),
238 reloc->howto->name, reloc->addend, input_section->owner,
239 input_section, reloc->address)))
240 abort ();
241 }
242 bfd_put_8 (in_abfd, gap, data + *dst_ptr);
243 (*dst_ptr)++;
244 (*src_ptr)++;
245 break;
246 }
247
248 case R_DISP7:
249 {
250 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
251 input_section);
252 bfd_vma dot = (link_order->offset
253 + *dst_ptr
254 + input_section->output_section->vma);
255 int gap = dst - dot - 1; /* -1, since we're in the odd byte of the
256 word and the pc's been incremented. */
257
258 if (gap & 1)
259 abort ();
260 gap /= 2;
261
262 if (gap > 0 || gap < -127)
263 {
264 if (! ((*link_info->callbacks->reloc_overflow)
265 (link_info, NULL,
266 bfd_asymbol_name (*reloc->sym_ptr_ptr),
267 reloc->howto->name, reloc->addend, input_section->owner,
268 input_section, reloc->address)))
269 abort ();
270 }
271 bfd_put_8 (in_abfd,
272 (bfd_get_8 ( in_abfd, data + *dst_ptr) & 0x80) + (-gap & 0x7f),
273 data + *dst_ptr);
274 (*dst_ptr)++;
275 (*src_ptr)++;
276 break;
277 }
278
279 case R_CALLR:
280 {
281 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
282 input_section);
283 bfd_vma dot = (link_order->offset
284 + *dst_ptr
285 + input_section->output_section->vma);
286 int gap = dst - dot - 2;
287
288 if (gap & 1)
289 abort ();
290 if (gap > 4096 || gap < -4095)
291 {
292 if (! ((*link_info->callbacks->reloc_overflow)
293 (link_info, NULL,
294 bfd_asymbol_name (*reloc->sym_ptr_ptr),
295 reloc->howto->name, reloc->addend, input_section->owner,
296 input_section, reloc->address)))
297 abort ();
298 }
299 gap /= 2;
300 bfd_put_16 (in_abfd,
301 (bfd_get_16 ( in_abfd, data + *dst_ptr) & 0xf000) | (-gap & 0x0fff),
302 data + *dst_ptr);
303 (*dst_ptr) += 2;
304 (*src_ptr) += 2;
305 break;
306 }
307
308 case R_REL16:
309 {
310 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
311 input_section);
312 bfd_vma dot = (link_order->offset
313 + *dst_ptr
314 + input_section->output_section->vma);
315 int gap = dst - dot - 2;
316
317 if (gap > 32767 || gap < -32768)
318 {
319 if (! ((*link_info->callbacks->reloc_overflow)
320 (link_info, NULL,
321 bfd_asymbol_name (*reloc->sym_ptr_ptr),
322 reloc->howto->name, reloc->addend, input_section->owner,
323 input_section, reloc->address)))
324 abort ();
325 }
326 bfd_put_16 (in_abfd, (bfd_vma) gap, data + *dst_ptr);
327 (*dst_ptr) += 2;
328 (*src_ptr) += 2;
329 break;
330 }
331
332 default:
333 abort ();
334 }
335 }
336
337 #define coff_reloc16_extra_cases extra_case
338
339 #include "coffcode.h"
340
341 #undef coff_bfd_get_relocated_section_contents
342 #undef coff_bfd_relax_section
343 #define coff_bfd_get_relocated_section_contents \
344 bfd_coff_reloc16_get_relocated_section_contents
345 #define coff_bfd_relax_section bfd_coff_reloc16_relax_section
346
347 CREATE_BIG_COFF_TARGET_VEC (z8kcoff_vec, "coff-z8k", 0, 0, '_', NULL, COFF_SWAP_TABLE)
348