bfd/
[binutils.git] / bfd / coff-z8k.c
blobcf4da77c299cac146fa2270e6e3b1f1faf6df61a
1 /* BFD back-end for Zilog Z800n COFF binaries.
2 Copyright 1992, 1993, 1994, 1995, 1997, 1999, 2000, 2001, 2002, 2003
3 Free Software Foundation, Inc.
4 Contributed by Cygnus Support.
5 Written by Steve Chamberlain, <sac@cygnus.com>.
7 This file is part of BFD, the Binary File Descriptor library.
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.
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.
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. */
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"
31 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1)
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);
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);
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);
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);
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);
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);
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);
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);
69 /* Turn a howto into a reloc number */
71 static int
72 coff_z8k_select_reloc (reloc_howto_type *howto)
74 return howto->type;
77 #define SELECT_RELOC(x,howto) x.r_type = coff_z8k_select_reloc(howto)
79 #define BADMAG(x) Z8KBADMAG(x)
80 #define Z8K 1 /* Customize coffcode.h */
81 #define __A_MAGIC_SET__
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';
90 /* Code to turn a r_type into a howto ptr, uses the above howto table. */
92 static void
93 rtype2howto (arelent *internal, struct internal_reloc *dst)
95 switch (dst->r_type)
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;
127 #define RTYPE2HOWTO(internal, relocentry) rtype2howto (internal, relocentry)
129 /* Perform any necessary magic to the addend in a reloc entry. */
131 #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
132 cache_ptr->addend = ext_reloc.r_offset;
134 #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
135 reloc_processing(relent, reloc, symbols, abfd, section)
137 static void
138 reloc_processing (arelent *relent,
139 struct internal_reloc *reloc,
140 asymbol **symbols,
141 bfd *abfd,
142 asection *section)
144 relent->address = reloc->r_vaddr;
145 rtype2howto (relent, reloc);
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;
152 relent->addend = reloc->r_offset;
153 relent->address -= section->vma;
156 static void
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)
165 asection * input_section = link_order->u.indirect.section;
167 switch (reloc->howto->type)
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;
177 case R_IMM32:
178 /* If no flags are set, assume immediate value. */
179 if (! (*reloc->sym_ptr_ptr)->section->flags)
181 bfd_put_32 (in_abfd,
182 bfd_coff_reloc16_get_value (reloc, link_info,
183 input_section),
184 data + *dst_ptr);
186 else
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);
197 (*dst_ptr) += 4;
198 (*src_ptr) += 4;
199 break;
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;
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;
220 case R_JR:
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. */
230 if (gap & 1)
231 abort ();
232 gap /= 2;
233 if (gap > 128 || gap < -128)
235 if (! ((*link_info->callbacks->reloc_overflow)
236 (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
237 reloc->howto->name, reloc->addend, input_section->owner,
238 input_section, reloc->address)))
239 abort ();
241 bfd_put_8 (in_abfd, gap, data + *dst_ptr);
242 (*dst_ptr)++;
243 (*src_ptr)++;
244 break;
247 case R_DISP7:
249 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
250 input_section);
251 bfd_vma dot = (link_order->offset
252 + *dst_ptr
253 + input_section->output_section->vma);
254 int gap = dst - dot - 1; /* -1, since we're in the odd byte of the
255 word and the pc's been incremented. */
257 if (gap & 1)
258 abort ();
259 gap /= 2;
261 if (gap > 0 || gap < -127)
263 if (! ((*link_info->callbacks->reloc_overflow)
264 (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
265 reloc->howto->name, reloc->addend, input_section->owner,
266 input_section, reloc->address)))
267 abort ();
269 bfd_put_8 (in_abfd,
270 (bfd_get_8 ( in_abfd, data + *dst_ptr) & 0x80) + (-gap & 0x7f),
271 data + *dst_ptr);
272 (*dst_ptr)++;
273 (*src_ptr)++;
274 break;
277 case R_CALLR:
279 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
280 input_section);
281 bfd_vma dot = (link_order->offset
282 + *dst_ptr
283 + input_section->output_section->vma);
284 int gap = dst - dot - 2;
286 if (gap & 1)
287 abort ();
288 if (gap > 4096 || gap < -4095)
290 if (! ((*link_info->callbacks->reloc_overflow)
291 (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
292 reloc->howto->name, reloc->addend, input_section->owner,
293 input_section, reloc->address)))
294 abort ();
296 gap /= 2;
297 bfd_put_16 (in_abfd,
298 (bfd_get_16 ( in_abfd, data + *dst_ptr) & 0xf000) | (-gap & 0x0fff),
299 data + *dst_ptr);
300 (*dst_ptr) += 2;
301 (*src_ptr) += 2;
302 break;
305 case R_REL16:
307 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
308 input_section);
309 bfd_vma dot = (link_order->offset
310 + *dst_ptr
311 + input_section->output_section->vma);
312 int gap = dst - dot - 2;
314 if (gap > 32767 || gap < -32768)
316 if (! ((*link_info->callbacks->reloc_overflow)
317 (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
318 reloc->howto->name, reloc->addend, input_section->owner,
319 input_section, reloc->address)))
320 abort ();
322 bfd_put_16 (in_abfd, (bfd_vma) gap, data + *dst_ptr);
323 (*dst_ptr) += 2;
324 (*src_ptr) += 2;
325 break;
328 default:
329 abort ();
333 #define coff_reloc16_extra_cases extra_case
335 #include "coffcode.h"
337 #undef coff_bfd_get_relocated_section_contents
338 #undef coff_bfd_relax_section
339 #define coff_bfd_get_relocated_section_contents \
340 bfd_coff_reloc16_get_relocated_section_contents
341 #define coff_bfd_relax_section bfd_coff_reloc16_relax_section
343 CREATE_BIG_COFF_TARGET_VEC (z8kcoff_vec, "coff-z8k", 0, 0, '_', NULL, COFF_SWAP_TABLE)