2000-05-04 Michael Snyder <msnyder@seadog.cygnus.com>
[binutils.git] / bfd / coff-w65.c
blob0379bfbc325ea8fa7dc4e063196af1fa6fa947b5
1 /* BFD back-end for WDC 65816 COFF binaries.
2 Copyright 1995, 96, 1997 Free Software Foundation, Inc.
3 Written by Steve Chamberlain, <sac@cygnus.com>.
5 This file is part of BFD, the Binary File Descriptor library.
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 2 of the License, or
10 (at your option) any later version.
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.
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 #include "bfd.h"
22 #include "sysdep.h"
23 #include "libbfd.h"
24 #include "bfdlink.h"
25 #include "coff/w65.h"
26 #include "coff/internal.h"
27 #include "libcoff.h"
29 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1)
30 static reloc_howto_type howto_table[] =
32 HOWTO (R_W65_ABS8, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, "abs8", true, 0x000000ff, 0x000000ff, false),
33 HOWTO (R_W65_ABS16, 1, 0, 16, false, 0, complain_overflow_bitfield, 0, "abs16", true, 0x0000ffff, 0x0000ffff, false),
34 HOWTO (R_W65_ABS24, 0, 2, 32, false, 0, complain_overflow_bitfield, 0, "abs24", true, 0x00ffffff, 0x00ffffff, false),
35 HOWTO (R_W65_ABS8S8, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, ">abs8", true, 0x000000ff, 0x000000ff, false),
36 HOWTO (R_W65_ABS8S16, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, "^abs8", true, 0x000000ff, 0x000000ff, false),
37 HOWTO (R_W65_ABS16S8, 1, 0, 16, false, 0, complain_overflow_bitfield, 0, ">abs16", true, 0x0000ffff, 0x0000ffff, false),
38 HOWTO (R_W65_ABS16S16,1, 0, 16, false, 0, complain_overflow_bitfield, 0, "^abs16", true, 0x0000ffff, 0x0000ffff, false),
39 HOWTO (R_W65_PCR8, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, "pcrel8", true, 0x000000ff, 0x000000ff, true),
40 HOWTO (R_W65_PCR16, 1, 0, 16, false, 0, complain_overflow_bitfield, 0, "pcrel16", true, 0x0000ffff, 0x0000ffff, true),
41 HOWTO (R_W65_DP, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, "dp", true, 0x000000ff, 0x000000ff, false),
46 /* Turn a howto into a reloc number */
48 #define SELECT_RELOC(x,howto) \
49 { x.r_type = select_reloc(howto); }
51 #define BADMAG(x) (W65BADMAG(x))
52 #define W65 1 /* Customize coffcode.h */
53 #define __A_MAGIC_SET__
56 /* Code to swap in the reloc */
57 #define SWAP_IN_RELOC_OFFSET bfd_h_get_32
58 #define SWAP_OUT_RELOC_OFFSET bfd_h_put_32
59 #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
60 dst->r_stuff[0] = 'S'; \
61 dst->r_stuff[1] = 'C';
64 static int
65 select_reloc (howto)
66 reloc_howto_type *howto;
68 return howto->type ;
71 /* Code to turn a r_type into a howto ptr, uses the above howto table
74 static void
75 rtype2howto (internal, dst)
76 arelent *internal;
77 struct internal_reloc *dst;
79 internal->howto = howto_table + dst->r_type - 1;
82 #define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry)
85 /* Perform any necessary magic to the addend in a reloc entry */
88 #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
89 cache_ptr->addend = ext_reloc.r_offset;
92 #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
93 reloc_processing(relent, reloc, symbols, abfd, section)
95 static void
96 reloc_processing (relent, reloc, symbols, abfd, section)
97 arelent * relent;
98 struct internal_reloc *reloc;
99 asymbol ** symbols;
100 bfd * abfd;
101 asection * section;
103 relent->address = reloc->r_vaddr;
104 rtype2howto (relent, reloc);
106 if (((int) reloc->r_symndx) > 0)
108 relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
110 else
112 relent->sym_ptr_ptr = (asymbol **)&(bfd_abs_symbol);
117 relent->addend = reloc->r_offset;
119 relent->address -= section->vma;
120 /* relent->section = 0;*/
124 static int
125 h8300_reloc16_estimate(abfd, input_section, reloc, shrink, link_info)
126 bfd *abfd;
127 asection *input_section;
128 arelent *reloc;
129 unsigned int shrink;
130 struct bfd_link_info *link_info;
132 bfd_vma value;
133 bfd_vma dot;
134 bfd_vma gap;
136 /* The address of the thing to be relocated will have moved back by
137 the size of the shrink - but we don't change reloc->address here,
138 since we need it to know where the relocation lives in the source
139 uncooked section */
141 /* reloc->address -= shrink; conceptual */
143 bfd_vma address = reloc->address - shrink;
146 switch (reloc->howto->type)
148 case R_MOV16B2:
149 case R_JMP2:
150 shrink+=2;
151 break;
153 /* Thing is a move one byte */
154 case R_MOV16B1:
155 value = bfd_coff_reloc16_get_value(reloc, link_info, input_section);
157 if (value >= 0xff00)
160 /* Change the reloc type from 16bit, possible 8 to 8bit
161 possible 16 */
162 reloc->howto = reloc->howto + 1;
163 /* The place to relc moves back by one */
164 /* This will be two bytes smaller in the long run */
165 shrink +=2 ;
166 bfd_perform_slip(abfd, 2, input_section, address);
169 break;
170 /* This is the 24 bit branch which could become an 8 bitter,
171 the relocation points to the first byte of the insn, not the
172 actual data */
174 case R_JMPL1:
175 value = bfd_coff_reloc16_get_value(reloc, link_info, input_section);
177 dot = input_section->output_section->vma +
178 input_section->output_offset + address;
180 /* See if the address we're looking at within 127 bytes of where
181 we are, if so then we can use a small branch rather than the
182 jump we were going to */
184 gap = value - dot ;
186 if (-120 < (long)gap && (long)gap < 120 )
189 /* Change the reloc type from 24bit, possible 8 to 8bit
190 possible 32 */
191 reloc->howto = reloc->howto + 1;
192 /* This will be two bytes smaller in the long run */
193 shrink +=2 ;
194 bfd_perform_slip(abfd, 2, input_section, address);
196 break;
198 case R_JMP1:
200 value = bfd_coff_reloc16_get_value(reloc, link_info, input_section);
202 dot = input_section->output_section->vma +
203 input_section->output_offset + address;
205 /* See if the address we're looking at within 127 bytes of where
206 we are, if so then we can use a small branch rather than the
207 jump we were going to */
209 gap = value - (dot - shrink);
212 if (-120 < (long)gap && (long)gap < 120 )
215 /* Change the reloc type from 16bit, possible 8 to 8bit
216 possible 16 */
217 reloc->howto = reloc->howto + 1;
218 /* The place to relc moves back by one */
220 /* This will be two bytes smaller in the long run */
221 shrink +=2 ;
222 bfd_perform_slip(abfd, 2, input_section, address);
224 break;
228 return shrink;
232 /* First phase of a relaxing link */
234 /* Reloc types
235 large small
236 R_MOV16B1 R_MOV16B2 mov.b with 16bit or 8 bit address
237 R_JMP1 R_JMP2 jmp or pcrel branch
238 R_JMPL1 R_JMPL_B8 24jmp or pcrel branch
239 R_MOV24B1 R_MOV24B2 24 or 8 bit reloc for mov.b
243 static void
244 h8300_reloc16_extra_cases (abfd, link_info, link_order, reloc, data, src_ptr,
245 dst_ptr)
246 bfd *abfd;
247 struct bfd_link_info *link_info;
248 struct bfd_link_order *link_order;
249 arelent *reloc;
250 bfd_byte *data;
251 unsigned int *src_ptr;
252 unsigned int *dst_ptr;
254 unsigned int src_address = *src_ptr;
255 unsigned int dst_address = *dst_ptr;
256 asection *input_section = link_order->u.indirect.section;
258 switch (reloc->howto->type)
260 case R_W65_ABS8:
261 case R_W65_DP:
263 unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info,
264 input_section);
265 bfd_put_8 (abfd, gap, data + dst_address);
266 dst_address += 1;
267 src_address += 1;
269 break;
271 case R_W65_ABS8S8:
273 unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info,
274 input_section);
275 gap >>= 8;
276 bfd_put_8 (abfd, gap, data + dst_address);
277 dst_address += 1;
278 src_address += 1;
280 break;
282 case R_W65_ABS8S16:
284 unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info,
285 input_section);
286 gap >>=16;
287 bfd_put_8 (abfd, gap, data + dst_address);
288 dst_address += 1;
289 src_address += 1;
291 break;
293 case R_W65_ABS16:
295 unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info,
296 input_section);
298 bfd_put_16 (abfd, gap, data + dst_address);
299 dst_address += 2;
300 src_address += 2;
302 break;
303 case R_W65_ABS16S8:
305 unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info,
306 input_section);
307 gap >>= 8;
308 bfd_put_16 (abfd, gap, data + dst_address);
309 dst_address += 2;
310 src_address += 2;
312 break;
313 case R_W65_ABS16S16:
315 unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info,
316 input_section);
317 gap >>= 16;
318 bfd_put_16 (abfd, gap, data + dst_address);
319 dst_address += 2;
320 src_address += 2;
322 break;
324 case R_W65_ABS24:
326 unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info,
327 input_section);
328 bfd_put_16 (abfd, gap, data + dst_address);
329 bfd_put_8 (abfd, gap>>16, data+dst_address+2);
330 dst_address += 3;
331 src_address += 3;
333 break;
335 case R_W65_PCR8:
337 int gap = bfd_coff_reloc16_get_value (reloc, link_info,
338 input_section);
339 bfd_vma dot = link_order->offset
340 + dst_address
341 + link_order->u.indirect.section->output_section->vma;
343 gap -= dot + 1;
344 if (gap < -128 || gap > 127) {
345 if (! ((*link_info->callbacks->reloc_overflow)
346 (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
347 reloc->howto->name, reloc->addend, input_section->owner,
348 input_section, reloc->address)))
349 abort();
351 bfd_put_8 (abfd, gap, data + dst_address);
352 dst_address += 1;
353 src_address += 1;
355 break;
357 case R_W65_PCR16:
359 bfd_vma gap = bfd_coff_reloc16_get_value (reloc, link_info,
360 input_section);
361 bfd_vma dot = link_order->offset
362 + dst_address
363 + link_order->u.indirect.section->output_section->vma;
366 /* This wraps within the page, so ignore the relativeness, look at the
367 high part */
368 if ((gap & 0xf0000) != (dot & 0xf0000)) {
369 if (! ((*link_info->callbacks->reloc_overflow)
370 (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
371 reloc->howto->name, reloc->addend, input_section->owner,
372 input_section, reloc->address)))
373 abort();
376 gap -= dot + 2;
377 bfd_put_16 (abfd, gap, data + dst_address);
378 dst_address += 2;
379 src_address += 2;
381 break;
382 default:
383 printf(_("ignoring reloc %s\n"), reloc->howto->name);
384 break;
387 *src_ptr = src_address;
388 *dst_ptr = dst_address;
392 #define coff_reloc16_extra_cases h8300_reloc16_extra_cases
393 #define coff_reloc16_estimate h8300_reloc16_estimate
395 #include "coffcode.h"
398 #undef coff_bfd_get_relocated_section_contents
399 #undef coff_bfd_relax_section
400 #define coff_bfd_get_relocated_section_contents \
401 bfd_coff_reloc16_get_relocated_section_contents
402 #define coff_bfd_relax_section bfd_coff_reloc16_relax_section
404 CREATE_LITTLE_COFF_TARGET_VEC (w65_vec, "coff-w95", BFD_IS_RELAXABLE, 0, '_', NULL)