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3c8a3c56 JG |
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 | 5 | This file is part of BFD, the Binary File Descriptor library. |
2013f9b4 | 6 | |
3c8a3c56 | 7 | This program is free software; you can redistribute it and/or modify |
2013f9b4 | 8 | it under the terms of the GNU General Public License as published by |
3c8a3c56 JG |
9 | the Free Software Foundation; either version 2 of the License, or |
10 | (at your option) any later version. | |
2013f9b4 | 11 | |
3c8a3c56 | 12 | This program is distributed in the hope that it will be useful, |
2013f9b4 SC |
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. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
3c8a3c56 JG |
18 | along with this program; if not, write to the Free Software |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
2013f9b4 SC |
20 | |
21 | /* $Id$ */ | |
22 | ||
23 | #define A29K 1 | |
24 | ||
2013f9b4 | 25 | #include "bfd.h" |
bbc8d484 | 26 | #include "sysdep.h" |
2013f9b4 SC |
27 | #include "libbfd.h" |
28 | #include "obstack.h" | |
c3eb25fc SC |
29 | #include "coff/a29k.h" |
30 | #include "coff/internal.h" | |
2013f9b4 SC |
31 | #include "libcoff.h" |
32 | ||
33 | #define INSERT_HWORD(WORD,HWORD) \ | |
c2ce0738 SC |
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)) | |
2013f9b4 SC |
39 | |
40 | /* Provided the symbol, returns the value reffed */ | |
41 | static long | |
42 | get_symbol_value(symbol) | |
43 | asymbol *symbol; | |
44 | { | |
45 | long relocation = 0; | |
46 | ||
859f11ff SC |
47 | if (symbol->section == &bfd_com_section) |
48 | { | |
49 | relocation = 0; | |
2013f9b4 | 50 | } |
859f11ff SC |
51 | else |
52 | { | |
53 | relocation = symbol->value + | |
54 | symbol->section->output_section->vma + | |
55 | symbol->section->output_offset; | |
56 | } | |
57 | ||
2013f9b4 SC |
58 | return(relocation); |
59 | } | |
60 | ||
c2ce0738 SC |
61 | /* this function is in charge of performing all the 29k relocations */ |
62 | ||
9e2dad8e | 63 | static bfd_reloc_status_type |
2cfd0562 | 64 | DEFUN(a29k_reloc,(abfd, reloc_entry, symbol_in, data, input_section, output_bfd), |
c2ce0738 SC |
65 | bfd *abfd AND |
66 | arelent *reloc_entry AND | |
67 | asymbol *symbol_in AND | |
8b87cbae | 68 | PTR data AND |
2cfd0562 SC |
69 | asection *input_section AND |
70 | bfd *output_bfd) | |
2013f9b4 | 71 | { |
859f11ff SC |
72 | /* the consth relocation comes in two parts, we have to remember |
73 | the state between calls, in these variables */ | |
74 | static boolean part1_consth_active = false; | |
75 | static unsigned long part1_consth_value; | |
c2ce0738 | 76 | |
859f11ff SC |
77 | unsigned long insn; |
78 | unsigned long sym_value; | |
79 | unsigned long unsigned_value; | |
80 | unsigned short r_type; | |
81 | long signed_value; | |
c2ce0738 | 82 | |
2cfd0562 | 83 | unsigned long addr = reloc_entry->address ; /*+ input_section->vma*/ |
859f11ff | 84 | bfd_byte *hit_data =addr + (bfd_byte *)(data); |
2013f9b4 | 85 | |
859f11ff | 86 | r_type = reloc_entry->howto->type; |
f58809fd | 87 | |
2cfd0562 SC |
88 | if (output_bfd) { |
89 | /* Partial linking - do nothing */ | |
90 | reloc_entry->address += input_section->output_offset; | |
91 | return bfd_reloc_ok; | |
92 | ||
93 | } | |
94 | ||
859f11ff SC |
95 | if (symbol_in && (symbol_in->section == &bfd_und_section)) |
96 | { | |
97 | /* Keep the state machine happy in case we're called again */ | |
98 | if (r_type == R_IHIHALF) | |
c2ce0738 | 99 | { |
859f11ff SC |
100 | part1_consth_active = true; |
101 | part1_consth_value = 0; | |
f58809fd | 102 | } |
859f11ff SC |
103 | return(bfd_reloc_undefined); |
104 | } | |
f58809fd | 105 | |
859f11ff SC |
106 | if ((part1_consth_active) && (r_type != R_IHCONST)) |
107 | { | |
108 | fprintf(stderr,"Relocation problem : "); | |
109 | fprintf(stderr,"Missing IHCONST in module %s\n",abfd->filename); | |
110 | part1_consth_active = false; | |
111 | return(bfd_reloc_dangerous); | |
112 | } | |
f58809fd | 113 | |
f58809fd | 114 | |
859f11ff SC |
115 | sym_value = get_symbol_value(symbol_in); |
116 | ||
117 | switch (r_type) | |
118 | { | |
119 | case R_IREL: | |
120 | insn = bfd_get_32(abfd, hit_data); | |
121 | /* Take the value in the field and sign extend it */ | |
122 | signed_value = EXTRACT_HWORD(insn) << 2; | |
123 | signed_value = SIGN_EXTEND_HWORD(signed_value); | |
124 | signed_value += sym_value + reloc_entry->addend; | |
125 | if ((signed_value&~0x3ffff) == 0) | |
126 | { /* Absolute jmp/call */ | |
127 | insn |= (1<<24); /* Make it absolute */ | |
128 | /* FIXME: Should we change r_type to R_IABS */ | |
859f11ff SC |
129 | } |
130 | else | |
c2ce0738 | 131 | { |
859f11ff SC |
132 | /* Relative jmp/call, so subtract from the value the |
133 | address of the place we're coming from */ | |
134 | signed_value -= reloc_entry->address + | |
135 | input_section->output_section->vma + | |
136 | input_section->output_offset; | |
137 | if (signed_value>0x1ffff || signed_value<-0x20000) | |
138 | return(bfd_reloc_outofrange); | |
859f11ff | 139 | } |
bbbd93b8 | 140 | signed_value >>= 2; |
859f11ff SC |
141 | insn = INSERT_HWORD(insn, signed_value); |
142 | bfd_put_32(abfd, insn ,hit_data); | |
143 | break; | |
144 | case R_ILOHALF: | |
145 | insn = bfd_get_32(abfd, hit_data); | |
146 | unsigned_value = EXTRACT_HWORD(insn); | |
147 | unsigned_value += sym_value + reloc_entry->addend; | |
148 | insn = INSERT_HWORD(insn, unsigned_value); | |
149 | bfd_put_32(abfd, insn, hit_data); | |
150 | break; | |
151 | case R_IHIHALF: | |
152 | insn = bfd_get_32(abfd, hit_data); | |
153 | /* consth, part 1 | |
154 | Just get the symbol value that is referenced */ | |
155 | part1_consth_active = true; | |
156 | part1_consth_value = sym_value + reloc_entry->addend; | |
157 | /* Don't modify insn until R_IHCONST */ | |
158 | break; | |
159 | case R_IHCONST: | |
160 | insn = bfd_get_32(abfd, hit_data); | |
161 | /* consth, part 2 | |
162 | Now relocate the reference */ | |
163 | if (part1_consth_active == false) { | |
164 | fprintf(stderr,"Relocation problem : "); | |
165 | fprintf(stderr,"IHIHALF missing in module %s\n", | |
166 | abfd->filename); | |
167 | return(bfd_reloc_dangerous); | |
168 | } | |
169 | /* sym_ptr_ptr = r_symndx, in coff_slurp_reloc_table() */ | |
170 | unsigned_value = 0; /*EXTRACT_HWORD(insn) << 16;*/ | |
171 | unsigned_value += reloc_entry->addend; /* r_symndx */ | |
172 | unsigned_value += part1_consth_value; | |
173 | unsigned_value = unsigned_value >> 16; | |
174 | insn = INSERT_HWORD(insn, unsigned_value); | |
175 | part1_consth_active = false; | |
176 | bfd_put_32(abfd, insn, hit_data); | |
177 | break; | |
178 | case R_BYTE: | |
179 | insn = bfd_get_8(abfd, hit_data); | |
180 | unsigned_value = insn + sym_value + reloc_entry->addend; | |
181 | if (unsigned_value & 0xffffff00) { | |
182 | fprintf(stderr,"Relocation problem : "); | |
183 | fprintf(stderr,"byte value too large in module %s\n", | |
184 | abfd->filename); | |
185 | return(bfd_reloc_overflow); | |
186 | } | |
ab98fd5d | 187 | bfd_put_8(abfd, unsigned_value, hit_data); |
859f11ff SC |
188 | break; |
189 | case R_HWORD: | |
190 | insn = bfd_get_16(abfd, hit_data); | |
191 | unsigned_value = insn + sym_value + reloc_entry->addend; | |
192 | if (unsigned_value & 0xffff0000) { | |
193 | fprintf(stderr,"Relocation problem : "); | |
194 | fprintf(stderr,"hword value too large in module %s\n", | |
195 | abfd->filename); | |
196 | return(bfd_reloc_overflow); | |
f58809fd SC |
197 | } |
198 | ||
2cfd0562 | 199 | bfd_put_16(abfd, insn, hit_data); |
859f11ff SC |
200 | break; |
201 | case R_WORD: | |
202 | insn = bfd_get_32(abfd, hit_data); | |
203 | insn += sym_value + reloc_entry->addend; | |
204 | bfd_put_32(abfd, insn, hit_data); | |
205 | break; | |
206 | default: | |
207 | fprintf(stderr,"Relocation problem : "); | |
208 | fprintf(stderr,"Unrecognized reloc type %d, in module %s\n", | |
209 | r_type,abfd->filename); | |
210 | return (bfd_reloc_dangerous); | |
211 | } | |
212 | ||
213 | ||
214 | return(bfd_reloc_ok); | |
2013f9b4 SC |
215 | } |
216 | ||
217 | /* type rightshift | |
218 | size | |
219 | bitsize | |
220 | pc-relative | |
221 | bitpos | |
222 | absolute | |
223 | complain_on_overflow | |
224 | special_function | |
225 | relocation name | |
226 | partial_inplace | |
227 | src_mask | |
228 | */ | |
229 | ||
230 | /*FIXME: I'm not real sure about this table */ | |
231 | #define NA 0 /* Obsolete fields, via the documentation */ | |
21a7f8b6 | 232 | #define NAB false |
2013f9b4 SC |
233 | static reloc_howto_type howto_table[] = |
234 | { | |
21a7f8b6 | 235 | {R_ABS, 0, 3, NA, false, NA, NAB, true,a29k_reloc,"ABS", true, 0xffffffff,0xffffffff, false}, |
2013f9b4 SC |
236 | {1}, {2}, {3}, {4}, {5}, {6}, {7}, {8}, {9}, {10}, |
237 | {11}, {12}, {13}, {14}, {15}, {16}, {17}, {18}, {19}, {20}, | |
238 | {21}, {22}, {23}, | |
21a7f8b6 SC |
239 | {R_IREL, 0, 3, NA, true, NA, NAB, true,a29k_reloc,"IREL", true, 0xffffffff,0xffffffff, false}, |
240 | {R_IABS, 0, 3, NA, false, NA, NAB, true,a29k_reloc,"IABS", true, 0xffffffff,0xffffffff, false}, | |
241 | {R_ILOHALF, 0, 3, NA, true, NA, NAB, true,a29k_reloc,"ILOHALF", true, 0x0000ffff,0x0000ffff, false}, | |
242 | {R_IHIHALF, 0, 3, NA, true, NA, NAB, true,a29k_reloc,"IHIHALF", true, 0xffff0000,0xffff0000, false}, | |
243 | {R_IHCONST, 0, 3, NA, true, NA, NAB, true,a29k_reloc,"IHCONST", true, 0xffff0000,0xffff0000, false}, | |
244 | {R_BYTE, 0, 0, NA, false, NA, NAB, true,a29k_reloc,"BYTE", true, 0x000000ff,0x000000ff, false}, | |
245 | {R_HWORD, 0, 1, NA, false, NA, NAB, true,a29k_reloc,"HWORD", true, 0x0000ffff,0x0000ffff, false}, | |
246 | {R_WORD, 0, 2, NA, false, NA, NAB, true,a29k_reloc,"WORD", true, 0xffffffff,0xffffffff, false}, | |
2013f9b4 SC |
247 | }; |
248 | #undef NA | |
249 | ||
250 | #define BADMAG(x) A29KBADMAG(x) | |
251 | ||
6cba8f4b SC |
252 | #define RELOC_PROCESSING(relent, reloc, symbols, abfd, section) \ |
253 | reloc_processing(relent, reloc, symbols, abfd, section) | |
254 | ||
e98e6ec1 | 255 | static void DEFUN(reloc_processing,(relent,reloc, symbols, abfd, section) , |
6cba8f4b SC |
256 | arelent *relent AND |
257 | struct internal_reloc *reloc AND | |
258 | asymbol **symbols AND | |
259 | bfd *abfd AND | |
260 | asection *section) | |
261 | { | |
262 | relent->address = reloc->r_vaddr; | |
263 | relent->howto = howto_table + reloc->r_type; | |
264 | if (reloc->r_type == R_IHCONST) | |
265 | { | |
266 | relent->addend = reloc->r_symndx; | |
b772312e | 267 | relent->sym_ptr_ptr= bfd_abs_section.symbol_ptr_ptr; |
6cba8f4b SC |
268 | } |
269 | else | |
270 | { | |
271 | asymbol *ptr; | |
272 | relent->sym_ptr_ptr = symbols + obj_convert(abfd)[reloc->r_symndx]; | |
273 | ||
274 | ptr = *(relent->sym_ptr_ptr); | |
275 | ||
276 | if (ptr | |
277 | && ptr->the_bfd == abfd | |
859f11ff | 278 | |
6cba8f4b SC |
279 | && ((ptr->flags & BSF_OLD_COMMON)== 0)) |
280 | { | |
859f11ff | 281 | relent->addend = 0; |
6cba8f4b SC |
282 | } |
283 | else | |
284 | { | |
285 | relent->addend = 0; | |
286 | } | |
287 | relent->address-= section->vma; | |
6cba8f4b SC |
288 | } |
289 | } | |
3b4f1a5d | 290 | |
2013f9b4 SC |
291 | #include "coffcode.h" |
292 | ||
293 | bfd_target a29kcoff_big_vec = | |
294 | { | |
c2ce0738 SC |
295 | "coff-a29k-big", /* name */ |
296 | bfd_target_coff_flavour, | |
297 | true, /* data byte order is big */ | |
298 | true, /* header byte order is big */ | |
299 | ||
300 | (HAS_RELOC | EXEC_P | /* object flags */ | |
301 | HAS_LINENO | HAS_DEBUG | | |
302 | HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT), | |
303 | ||
304 | (SEC_HAS_CONTENTS | SEC_ALLOC /* section flags */ | |
305 | | SEC_LOAD | SEC_RELOC | |
306 | | SEC_READONLY ), | |
307 | '/', /* ar_pad_char */ | |
308 | 15, /* ar_max_namelen */ | |
309 | 2, /* minimum section alignment */ | |
310 | /* data */ | |
311 | _do_getb64, _do_putb64, _do_getb32, | |
312 | _do_putb32, _do_getb16, _do_putb16, | |
313 | /* hdrs */ | |
314 | _do_getb64, _do_putb64, _do_getb32, | |
315 | _do_putb32, _do_getb16, _do_putb16, | |
316 | ||
317 | { | |
318 | ||
319 | _bfd_dummy_target, | |
320 | coff_object_p, | |
321 | bfd_generic_archive_p, | |
322 | _bfd_dummy_target | |
323 | }, | |
324 | { | |
325 | bfd_false, | |
326 | coff_mkobject, | |
327 | _bfd_generic_mkarchive, | |
328 | bfd_false | |
329 | }, | |
330 | { | |
331 | bfd_false, | |
332 | coff_write_object_contents, | |
333 | _bfd_write_archive_contents, | |
334 | bfd_false | |
335 | }, | |
336 | ||
337 | JUMP_TABLE(coff), | |
338 | COFF_SWAP_TABLE | |
339 | }; | |
2013f9b4 | 340 |