* hosts/h-*.h: Configure fopen using ../include/fopen-*.h
[deliverable/binutils-gdb.git] / bfd / coff-a29k.c
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1/* AMD 29000 COFF back-end for BFD.
2 Copyright (C) 1990-1991 Free Software Foundation, Inc.
3 Contributed by David Wood at New York University 7/8/91.
2013f9b4 4
3c8a3c56 5This file is part of BFD, the Binary File Descriptor library.
2013f9b4 6
3c8a3c56 7This program is free software; you can redistribute it and/or modify
2013f9b4 8it under the terms of the GNU General Public License as published by
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9the Free Software Foundation; either version 2 of the License, or
10(at your option) any later version.
2013f9b4 11
3c8a3c56 12This program is distributed in the hope that it will be useful,
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13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
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18along with this program; if not, write to the Free Software
19Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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20
21/* $Id$ */
22
23#define A29K 1
24
2013f9b4 25#include "bfd.h"
bbc8d484 26#include "sysdep.h"
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27#include "libbfd.h"
28#include "obstack.h"
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29#include "coff/a29k.h"
30#include "coff/internal.h"
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31#include "libcoff.h"
32
33#define INSERT_HWORD(WORD,HWORD) \
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34 (((WORD) & 0xff00ff00) | (((HWORD) & 0xff00) << 8) | ((HWORD)& 0xff))
35#define EXTRACT_HWORD(WORD) \
36 (((WORD) & 0x00ff0000) >> 8) | ((WORD)& 0xff)
37#define SIGN_EXTEND_HWORD(HWORD) \
38 ((HWORD) & 0x8000 ? (HWORD)|0xffff0000 : (HWORD))
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39
40/* Provided the symbol, returns the value reffed */
41static long
42get_symbol_value(symbol)
43asymbol *symbol;
44{
45 long relocation = 0;
46
47 if (symbol != (asymbol *)NULL) {
48 if (symbol->flags & BSF_FORT_COMM) {
49 relocation = 0;
50 } else {
51 relocation = symbol->value;
52 }
53 if (symbol->section != (asection *)NULL) {
54 relocation += symbol->section->output_section->vma +
55 symbol->section->output_offset;
56 }
57 }
58 return(relocation);
59}
60
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61/* this function is in charge of performing all the 29k relocations */
62
9e2dad8e 63static bfd_reloc_status_type
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64DEFUN(a29k_reloc,(abfd, reloc_entry, symbol_in, data, input_section),
65 bfd *abfd AND
66 arelent *reloc_entry AND
67 asymbol *symbol_in AND
68 unsigned char *data AND
69 asection *input_section)
2013f9b4 70{
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71 /* the consth relocation comes in two parts, we have to remember
72 the state between calls, in these variables */
73 static boolean part1_consth_active = false;
f58809fd 74 static unsigned long part1_consth_value;
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75
76 unsigned long insn;
77 unsigned long sym_value;
78 unsigned long unsigned_value;
f58809fd 79 unsigned short r_type;
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80 long signed_value;
81
2013f9b4 82
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83 r_type = reloc_entry->howto->type;
84
85 /* FIXME: Do we need to check for partial linking here */
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86 if (symbol_in && (symbol_in->flags & BSF_UNDEFINED))
87 {
f58809fd 88 /* Keep the state machine happy in case we're called again */
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89 if (r_type == R_IHIHALF)
90 {
91 part1_consth_active = true;
f58809fd 92 part1_consth_value = 0;
2013f9b4 93 }
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94 return(bfd_reloc_undefined);
95 }
96
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97 if ((part1_consth_active) && (r_type != R_IHCONST))
98 {
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99 fprintf(stderr,"Relocation problem : ");
100 fprintf(stderr,"Missing IHCONST in module %s\n",abfd->filename);
c2ce0738 101 part1_consth_active = false;
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102 return(bfd_reloc_dangerous);
103 }
104
105 insn = bfd_get_32(abfd, data + reloc_entry->address);
106 sym_value = get_symbol_value(symbol_in);
107
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108 switch (r_type)
109 {
110 case R_IREL:
111 /* Take the value in the field and sign extend it */
112 signed_value = EXTRACT_HWORD(insn) << 2;
113 signed_value = SIGN_EXTEND_HWORD(signed_value);
114 signed_value += sym_value + reloc_entry->addend;
115 if ((signed_value&~0x3ffff) == 0)
116 { /* Absolute jmp/call */
117 insn |= (1<<24); /* Make it absolute */
f58809fd 118 /* FIXME: Should we change r_type to R_IABS */
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119 signed_value /= 2;
120 }
121 else
122 {
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123 /* Relative jmp/call, so subtract from the value the
124 address of the place we're coming from */
c2ce0738 125 signed_value -= reloc_entry->address +
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126 input_section->output_section->vma +
127 input_section->output_offset;
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128 if (signed_value>0x1ffff || signed_value<-0x20000)
129 return(bfd_reloc_outofrange);
130
131 signed_value /= 2;
2013f9b4 132 }
c2ce0738 133 insn = INSERT_HWORD(insn, signed_value);
f58809fd 134 break;
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135 case R_ILOHALF:
136 unsigned_value = EXTRACT_HWORD(insn);
137 unsigned_value += sym_value + reloc_entry->addend;
138 insn = INSERT_HWORD(insn, unsigned_value);
f58809fd 139 break;
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140 case R_IHIHALF:
141 /* consth, part 1
142 Just get the symbol value that is referenced */
143 part1_consth_active = true;
f58809fd 144 part1_consth_value = sym_value + reloc_entry->addend;
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145 /* Don't modify insn until R_IHCONST */
146 return(bfd_reloc_ok);
f58809fd 147 break;
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148 case R_IHCONST:
149 /* consth, part 2
150 Now relocate the reference */
151 if (part1_consth_active == false) {
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152 fprintf(stderr,"Relocation problem : ");
153 fprintf(stderr,"IHIHALF missing in module %s\n",
154 abfd->filename);
f58809fd 155 return(bfd_reloc_dangerous);
2013f9b4 156 }
f58809fd 157 /* sym_ptr_ptr = r_symndx, in coff_slurp_reloc_table() */
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158 unsigned_value = 0; /*EXTRACT_HWORD(insn) << 16;*/
159 unsigned_value += reloc_entry->addend; /* r_symndx */
160 unsigned_value += part1_consth_value;
161 unsigned_value = unsigned_value >> 16;
162 insn = INSERT_HWORD(insn, unsigned_value);
163 part1_consth_active = false;
f58809fd 164 break;
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165 case R_BYTE:
166 unsigned_value = (insn >> 24) + sym_value + reloc_entry->addend;
167 if (unsigned_value & 0xffffff00) {
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168 fprintf(stderr,"Relocation problem : ");
169 fprintf(stderr,"byte value too large in module %s\n",
170 abfd->filename);
171 return(bfd_reloc_overflow);
172 }
c2ce0738 173 insn = (insn & 0x00ffffff) | (unsigned_value << 24);
f58809fd 174 break;
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175 case R_HWORD:
176 unsigned_value = (insn >> 16) + sym_value + reloc_entry->addend;
177 if (unsigned_value & 0xffff0000) {
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178 fprintf(stderr,"Relocation problem : ");
179 fprintf(stderr,"hword value too large in module %s\n",
180 abfd->filename);
181 return(bfd_reloc_overflow);
182 }
c2ce0738 183 insn = (insn & 0x0000ffff) | (unsigned_value<<16);
f58809fd 184 break;
c2ce0738 185 case R_WORD:
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186 insn += sym_value + reloc_entry->addend;
187 break;
c2ce0738 188 default:
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189 fprintf(stderr,"Relocation problem : ");
190 fprintf(stderr,"Unrecognized reloc type %d, in module %s\n",
191 r_type,abfd->filename);
192 return (bfd_reloc_dangerous);
193 }
194
195 bfd_put_32(abfd, insn, data+reloc_entry->address);
196 return(bfd_reloc_ok);
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197}
198
199/* type rightshift
200 size
201 bitsize
202 pc-relative
203 bitpos
204 absolute
205 complain_on_overflow
206 special_function
207 relocation name
208 partial_inplace
209 src_mask
210*/
211
212/*FIXME: I'm not real sure about this table */
213#define NA 0 /* Obsolete fields, via the documentation */
214static reloc_howto_type howto_table[] =
215{
216 {R_ABS, 0, 3, NA, false, NA, NA, true,a29k_reloc,"ABS", true, 0xffffffff,0xffffffff, false},
217 {1}, {2}, {3}, {4}, {5}, {6}, {7}, {8}, {9}, {10},
218 {11}, {12}, {13}, {14}, {15}, {16}, {17}, {18}, {19}, {20},
219 {21}, {22}, {23},
220 {R_IREL, 0, 3, NA, true, NA, NA, true,a29k_reloc,"IREL", true, 0xffffffff,0xffffffff, false},
221 {R_IABS, 0, 3, NA, false, NA, NA, true,a29k_reloc,"IABS", true, 0xffffffff,0xffffffff, false},
222 {R_ILOHALF, 0, 3, NA, true, NA, NA, true,a29k_reloc,"ILOHALF", true, 0x0000ffff,0x0000ffff, false},
223 {R_IHIHALF, 0, 3, NA, true, NA, NA, true,a29k_reloc,"IHIHALF", true, 0xffff0000,0xffff0000, false},
224 {R_IHCONST, 0, 3, NA, true, NA, NA, true,a29k_reloc,"IHCONST", true, 0xffff0000,0xffff0000, false},
225 {R_BYTE, 0, 0, NA, false, NA, NA, true,a29k_reloc,"BYTE", true, 0x000000ff,0x000000ff, false},
226 {R_HWORD, 0, 1, NA, false, NA, NA, true,a29k_reloc,"HWORD", true, 0x0000ffff,0x0000ffff, false},
227 {R_WORD, 0, 2, NA, false, NA, NA, true,a29k_reloc,"WORD", true, 0xffffffff,0xffffffff, false},
228};
229#undef NA
230
231#define BADMAG(x) A29KBADMAG(x)
232
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233#define RELOC_PROCESSING(relent, reloc, symbols, abfd, section) \
234 reloc_processing(relent, reloc, symbols, abfd, section)
235
236void DEFUN(reloc_processing,(relent,reloc, symbols, abfd, section) ,
237 arelent *relent AND
238 struct internal_reloc *reloc AND
239 asymbol **symbols AND
240 bfd *abfd AND
241 asection *section)
242{
243 relent->address = reloc->r_vaddr;
244 relent->howto = howto_table + reloc->r_type;
245 if (reloc->r_type == R_IHCONST)
246 {
247 relent->addend = reloc->r_symndx;
248 relent->sym_ptr_ptr= 0;
249 }
250 else
251 {
252 asymbol *ptr;
253 relent->sym_ptr_ptr = symbols + obj_convert(abfd)[reloc->r_symndx];
254
255 ptr = *(relent->sym_ptr_ptr);
256
257 if (ptr
258 && ptr->the_bfd == abfd
259 && ptr->section != (asection *) NULL
260 && ((ptr->flags & BSF_OLD_COMMON)== 0))
261 {
262 relent->addend = -(ptr->section->vma + ptr->value);
263 }
264 else
265 {
266 relent->addend = 0;
267 }
268 relent->address-= section->vma;
269 relent->section = 0;
270 }
271}
3b4f1a5d 272
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273#include "coffcode.h"
274
275bfd_target a29kcoff_big_vec =
276{
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277 "coff-a29k-big", /* name */
278 bfd_target_coff_flavour,
279 true, /* data byte order is big */
280 true, /* header byte order is big */
281
282 (HAS_RELOC | EXEC_P | /* object flags */
283 HAS_LINENO | HAS_DEBUG |
284 HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT),
285
286 (SEC_HAS_CONTENTS | SEC_ALLOC /* section flags */
287 | SEC_LOAD | SEC_RELOC
288 | SEC_READONLY ),
289 '/', /* ar_pad_char */
290 15, /* ar_max_namelen */
291 2, /* minimum section alignment */
292 /* data */
293 _do_getb64, _do_putb64, _do_getb32,
294 _do_putb32, _do_getb16, _do_putb16,
295 /* hdrs */
296 _do_getb64, _do_putb64, _do_getb32,
297 _do_putb32, _do_getb16, _do_putb16,
298
299 {
300
301 _bfd_dummy_target,
302 coff_object_p,
303 bfd_generic_archive_p,
304 _bfd_dummy_target
305 },
306 {
307 bfd_false,
308 coff_mkobject,
309 _bfd_generic_mkarchive,
310 bfd_false
311 },
312 {
313 bfd_false,
314 coff_write_object_contents,
315 _bfd_write_archive_contents,
316 bfd_false
317 },
318
319 JUMP_TABLE(coff),
320 COFF_SWAP_TABLE
321 };
2013f9b4 322
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