source: trunk/src/binutils/bfd/coff-z8k.c@ 657

Last change on this file since 657 was 610, checked in by bird, 22 years ago

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1/* BFD back-end for Zilog Z800n COFF binaries.
2 Copyright 1992, 1993, 1994, 1995, 1997, 1999, 2000, 2001, 2002
3 Free Software Foundation, Inc.
4 Contributed by Cygnus Support.
5 Written by Steve Chamberlain, <sac@cygnus.com>.
6
7This file is part of BFD, the Binary File Descriptor library.
8
9This program is free software; you can redistribute it and/or modify
10it under the terms of the GNU General Public License as published by
11the Free Software Foundation; either version 2 of the License, or
12(at your option) any later version.
13
14This program is distributed in the hope that it will be useful,
15but WITHOUT ANY WARRANTY; without even the implied warranty of
16MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17GNU General Public License for more details.
18
19You should have received a copy of the GNU General Public License
20along with this program; if not, write to the Free Software
21Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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
31static void extra_case PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *, arelent *, bfd_byte *, unsigned int *, unsigned int *));
32static void reloc_processing PARAMS ((arelent *, struct internal_reloc *, asymbol **, bfd *, asection *));
33static void rtype2howto PARAMS ((arelent *, struct internal_reloc *));
34static int coff_z8k_select_reloc PARAMS ((reloc_howto_type *));
35
36#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1)
37
38static reloc_howto_type r_imm32 =
39HOWTO (R_IMM32, 0, 2, 32, FALSE, 0,
40 complain_overflow_bitfield, 0, "r_imm32", TRUE, 0xffffffff,
41 0xffffffff, FALSE);
42
43static reloc_howto_type r_imm4l =
44HOWTO (R_IMM4L, 0, 0, 4, FALSE, 0,
45 complain_overflow_bitfield, 0, "r_imm4l", TRUE, 0xf, 0xf, FALSE);
46
47static reloc_howto_type r_da =
48HOWTO (R_IMM16, 0, 1, 16, FALSE, 0,
49 complain_overflow_bitfield, 0, "r_da", TRUE, 0x0000ffff, 0x0000ffff,
50 FALSE);
51
52static reloc_howto_type r_imm8 =
53HOWTO (R_IMM8, 0, 0, 8, FALSE, 0,
54 complain_overflow_bitfield, 0, "r_imm8", TRUE, 0x000000ff, 0x000000ff,
55 FALSE);
56
57static reloc_howto_type r_rel16 =
58HOWTO (R_REL16, 0, 1, 16, FALSE, 0,
59 complain_overflow_bitfield, 0, "r_rel16", TRUE, 0x0000ffff, 0x0000ffff,
60 TRUE);
61
62static reloc_howto_type r_jr =
63HOWTO (R_JR, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0,
64 "r_jr", TRUE, 0, 0, TRUE);
65
66static reloc_howto_type r_disp7 =
67HOWTO (R_DISP7, 0, 0, 7, TRUE, 0, complain_overflow_bitfield, 0,
68 "r_disp7", TRUE, 0, 0, TRUE);
69
70static reloc_howto_type r_callr =
71HOWTO (R_CALLR, 0, 1, 12, TRUE, 0, complain_overflow_signed, 0,
72 "r_callr", TRUE, 0xfff, 0xfff, TRUE);
73
74/* Turn a howto into a reloc number */
75
76static int
77coff_z8k_select_reloc (howto)
78 reloc_howto_type *howto;
79{
80 return howto->type;
81}
82
83#define SELECT_RELOC(x,howto) x.r_type = coff_z8k_select_reloc(howto)
84
85#define BADMAG(x) Z8KBADMAG(x)
86#define Z8K 1 /* Customize coffcode.h */
87#define __A_MAGIC_SET__
88
89/* Code to swap in the reloc. */
90#define SWAP_IN_RELOC_OFFSET H_GET_32
91#define SWAP_OUT_RELOC_OFFSET H_PUT_32
92#define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
93 dst->r_stuff[0] = 'S'; \
94 dst->r_stuff[1] = 'C';
95
96/* Code to turn a r_type into a howto ptr, uses the above howto table. */
97
98static void
99rtype2howto (internal, dst)
100 arelent * internal;
101 struct internal_reloc *dst;
102{
103 switch (dst->r_type)
104 {
105 default:
106 abort ();
107 break;
108 case R_IMM8:
109 internal->howto = &r_imm8;
110 break;
111 case R_IMM16:
112 internal->howto = &r_da;
113 break;
114 case R_JR:
115 internal->howto = &r_jr;
116 break;
117 case R_DISP7:
118 internal->howto = &r_disp7;
119 break;
120 case R_CALLR:
121 internal->howto = &r_callr;
122 break;
123 case R_REL16:
124 internal->howto = &r_rel16;
125 break;
126 case R_IMM32:
127 internal->howto = &r_imm32;
128 break;
129 case R_IMM4L:
130 internal->howto = &r_imm4l;
131 break;
132 }
133}
134
135#define RTYPE2HOWTO(internal, relocentry) rtype2howto (internal, relocentry)
136
137/* Perform any necessary magic to the addend in a reloc entry. */
138
139#define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
140 cache_ptr->addend = ext_reloc.r_offset;
141
142#define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
143 reloc_processing(relent, reloc, symbols, abfd, section)
144
145static void
146reloc_processing (relent, reloc, symbols, abfd, section)
147 arelent * relent;
148 struct internal_reloc * reloc;
149 asymbol ** symbols;
150 bfd * abfd;
151 asection * section;
152{
153 relent->address = reloc->r_vaddr;
154 rtype2howto (relent, reloc);
155
156 if (reloc->r_symndx > 0)
157 relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
158 else
159 relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
160
161 relent->addend = reloc->r_offset;
162 relent->address -= section->vma;
163}
164
165static void
166extra_case (in_abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)
167 bfd * in_abfd;
168 struct bfd_link_info * link_info;
169 struct bfd_link_order * link_order;
170 arelent * reloc;
171 bfd_byte * data;
172 unsigned int * src_ptr;
173 unsigned int * dst_ptr;
174{
175 asection * input_section = link_order->u.indirect.section;
176
177 switch (reloc->howto->type)
178 {
179 case R_IMM8:
180 bfd_put_8 (in_abfd,
181 bfd_coff_reloc16_get_value (reloc, link_info, input_section),
182 data + *dst_ptr);
183 (*dst_ptr) += 1;
184 (*src_ptr) += 1;
185 break;
186
187 case R_IMM32:
188 /* If no flags are set, assume immediate value. */
189 if (! (*reloc->sym_ptr_ptr)->section->flags)
190 {
191 bfd_put_32 (in_abfd,
192 bfd_coff_reloc16_get_value (reloc, link_info,
193 input_section),
194 data + *dst_ptr);
195 }
196 else
197 {
198 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
199 input_section);
200 /* Adresses are 23 bit, and the layout of those in a 32-bit
201 value is as follows:
202 1AAAAAAA xxxxxxxx AAAAAAAA AAAAAAAA
203 (A - address bits, x - ignore). */
204 dst = (dst & 0xffff) | ((dst & 0xff0000) << 8) | 0x80000000;
205 bfd_put_32 (in_abfd, dst, data + *dst_ptr);
206 }
207 (*dst_ptr) += 4;
208 (*src_ptr) += 4;
209 break;
210
211 case R_IMM4L:
212 bfd_put_8 (in_abfd,
213 ((bfd_get_8 (in_abfd, data + *dst_ptr) & 0xf0)
214 | (0x0f
215 & bfd_coff_reloc16_get_value (reloc, link_info,
216 input_section))),
217 data + *dst_ptr);
218 (*dst_ptr) += 1;
219 (*src_ptr) += 1;
220 break;
221
222 case R_IMM16:
223 bfd_put_16 (in_abfd,
224 bfd_coff_reloc16_get_value (reloc, link_info, input_section),
225 data + *dst_ptr);
226 (*dst_ptr) += 2;
227 (*src_ptr) += 2;
228 break;
229
230 case R_JR:
231 {
232 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
233 input_section);
234 bfd_vma dot = (link_order->offset
235 + *dst_ptr
236 + input_section->output_section->vma);
237 int gap = dst - dot - 1; /* -1, since we're in the odd byte of the
238 word and the pc's been incremented. */
239
240 if (gap & 1)
241 abort ();
242 gap /= 2;
243 if (gap > 128 || gap < -128)
244 {
245 if (! ((*link_info->callbacks->reloc_overflow)
246 (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
247 reloc->howto->name, reloc->addend, input_section->owner,
248 input_section, reloc->address)))
249 abort ();
250 }
251 bfd_put_8 (in_abfd, gap, data + *dst_ptr);
252 (*dst_ptr)++;
253 (*src_ptr)++;
254 break;
255 }
256
257 case R_DISP7:
258 {
259 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
260 input_section);
261 bfd_vma dot = (link_order->offset
262 + *dst_ptr
263 + input_section->output_section->vma);
264 int gap = dst - dot - 1; /* -1, since we're in the odd byte of the
265 word and the pc's been incremented. */
266
267 if (gap & 1)
268 abort ();
269 gap /= 2;
270
271 if (gap > 0 || gap < -128)
272 {
273 if (! ((*link_info->callbacks->reloc_overflow)
274 (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
275 reloc->howto->name, reloc->addend, input_section->owner,
276 input_section, reloc->address)))
277 abort ();
278 }
279 bfd_put_8 (in_abfd,
280 (bfd_get_8 ( in_abfd, data + *dst_ptr) & 0x80) + (-gap & 0x7f),
281 data + *dst_ptr);
282 (*dst_ptr)++;
283 (*src_ptr)++;
284 break;
285 }
286
287 case R_CALLR:
288 {
289 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
290 input_section);
291 bfd_vma dot = (link_order->offset
292 + *dst_ptr
293 + input_section->output_section->vma);
294 int gap = dst - dot - 2;
295
296 if (gap & 1)
297 abort ();
298 gap /= 2;
299 if (gap > 8191 || gap < -8192)
300 {
301 if (! ((*link_info->callbacks->reloc_overflow)
302 (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
303 reloc->howto->name, reloc->addend, input_section->owner,
304 input_section, reloc->address)))
305 abort ();
306 }
307 bfd_put_16 (in_abfd,
308 (bfd_get_16 ( in_abfd, data + *dst_ptr) & 0xf000) | (-gap & 0x0fff),
309 data + *dst_ptr);
310 (*dst_ptr) += 2;
311 (*src_ptr) += 2;
312 break;
313 }
314
315 case R_REL16:
316 {
317 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
318 input_section);
319 bfd_vma dot = (link_order->offset
320 + *dst_ptr
321 + input_section->output_section->vma);
322 int gap = dst - dot - 2;
323
324 if (gap > 32767 || gap < -32768)
325 {
326 if (! ((*link_info->callbacks->reloc_overflow)
327 (link_info, 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 bfd_put_16 (in_abfd, (bfd_vma) gap, data + *dst_ptr);
333 (*dst_ptr) += 2;
334 (*src_ptr) += 2;
335 break;
336 }
337
338 default:
339 abort ();
340 }
341}
342
343#define coff_reloc16_extra_cases extra_case
344
345#include "coffcode.h"
346
347#undef coff_bfd_get_relocated_section_contents
348#undef coff_bfd_relax_section
349#define coff_bfd_get_relocated_section_contents \
350 bfd_coff_reloc16_get_relocated_section_contents
351#define coff_bfd_relax_section bfd_coff_reloc16_relax_section
352
353CREATE_BIG_COFF_TARGET_VEC (z8kcoff_vec, "coff-z8k", 0, 0, '_', NULL)
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