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252b5132 | 1 | /* BFD back-end for ns32k a.out-ish binaries. |
fd67aa11 | 2 | Copyright (C) 1990-2024 Free Software Foundation, Inc. |
252b5132 RH |
3 | Contributed by Ian Dall (idall@eleceng.adelaide.edu.au). |
4 | ||
4eb6b71c | 5 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 6 | |
4eb6b71c NC |
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 | |
cd123cb7 | 9 | the Free Software Foundation; either version 3 of the License, or |
4eb6b71c | 10 | (at your option) any later version. |
252b5132 | 11 | |
4eb6b71c NC |
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. | |
252b5132 | 16 | |
4eb6b71c NC |
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 | |
cd123cb7 NC |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
20 | MA 02110-1301, USA. */ | |
252b5132 | 21 | |
691bf19c | 22 | #include "sysdep.h" |
252b5132 | 23 | #include "bfd.h" |
57698478 | 24 | #include "libbfd.h" |
252b5132 RH |
25 | #include "aout/aout64.h" |
26 | #include "ns32k.h" | |
27 | ||
e43d48cc AM |
28 | /* Do not "beautify" the CONCAT* macro args. Traditional C will not |
29 | remove whitespace added here, and thus will fail to concatenate | |
30 | the tokens. */ | |
6d00b590 | 31 | #define MYNS(OP) CONCAT2 (ns32k_aout_,OP) |
e43d48cc | 32 | |
157090f7 AM |
33 | reloc_howto_type * MYNS (bfd_reloc_type_lookup) (bfd *, bfd_reloc_code_real_type); |
34 | reloc_howto_type * MYNS (bfd_reloc_name_lookup) (bfd *, const char *); | |
0a1b45a2 | 35 | bool MYNS (write_object_contents) (bfd *); |
252b5132 | 36 | |
1725a96e NC |
37 | /* Avoid multiple definitions from aoutx if supporting |
38 | standard a.out format(s) as well as this one. */ | |
e43d48cc | 39 | #define NAME(x,y) CONCAT3 (ns32kaout,_32_,y) |
252b5132 | 40 | |
7920ce38 | 41 | void bfd_ns32k_arch (void); |
252b5132 RH |
42 | |
43 | #include "libaout.h" | |
44 | ||
7920ce38 | 45 | #define MY(OP) MYNS (OP) |
252b5132 | 46 | |
7920ce38 NC |
47 | #define MY_swap_std_reloc_in MY (swap_std_reloc_in) |
48 | #define MY_swap_std_reloc_out MY (swap_std_reloc_out) | |
252b5132 RH |
49 | |
50 | /* The ns32k series is ah, unusual, when it comes to relocation. | |
1049f94e | 51 | There are three storage methods for relocatable objects. There |
1725a96e NC |
52 | are displacements, immediate operands and ordinary twos complement |
53 | data. Of these, only the last fits into the standard relocation | |
54 | scheme. Immediate operands are stored huffman encoded and | |
55 | immediate operands are stored big endian (where as the natural byte | |
5c4491d3 | 56 | order is little endian for this architecture). |
1725a96e NC |
57 | |
58 | Note that the ns32k displacement storage method is orthogonal to | |
59 | whether the relocation is pc relative or not. The "displacement" | |
60 | storage scheme is used for essentially all address constants. The | |
61 | displacement can be relative to zero (absolute displacement), | |
62 | relative to the pc (pc relative), the stack pointer, the frame | |
63 | pointer, the static base register and general purpose register etc. | |
64 | ||
65 | For example: | |
dc810e39 | 66 | |
1725a96e NC |
67 | sym1: .long . # pc relative 2's complement |
68 | sym1: .long foo # 2's complement not pc relative | |
dc810e39 | 69 | |
1725a96e | 70 | self: movd @self, r0 # pc relative displacement |
07d6d2b8 | 71 | movd foo, r0 # non pc relative displacement |
1725a96e NC |
72 | |
73 | self: movd self, r0 # pc relative immediate | |
07d6d2b8 | 74 | movd foo, r0 # non pc relative immediate |
dc810e39 | 75 | |
1725a96e NC |
76 | In addition, for historical reasons the encoding of the relocation types |
77 | in the a.out format relocation entries is such that even the relocation | |
4eb6b71c | 78 | methods which are standard are not encoded the standard way. */ |
252b5132 | 79 | |
7920ce38 NC |
80 | reloc_howto_type MY (howto_table)[] = |
81 | { | |
82 | /* ns32k immediate operands. */ | |
c94cb026 | 83 | HOWTO (BFD_RELOC_NS32K_IMM_8, 0, 1, 8, false, 0, complain_overflow_signed, |
7920ce38 | 84 | _bfd_ns32k_reloc_imm, "NS32K_IMM_8", |
0a1b45a2 | 85 | true, 0x000000ff,0x000000ff, false), |
c94cb026 | 86 | HOWTO (BFD_RELOC_NS32K_IMM_16, 0, 2, 16, false, 0, complain_overflow_signed, |
7920ce38 | 87 | _bfd_ns32k_reloc_imm, "NS32K_IMM_16", |
0a1b45a2 | 88 | true, 0x0000ffff,0x0000ffff, false), |
c94cb026 | 89 | HOWTO (BFD_RELOC_NS32K_IMM_32, 0, 4, 32, false, 0, complain_overflow_signed, |
7920ce38 | 90 | _bfd_ns32k_reloc_imm, "NS32K_IMM_32", |
0a1b45a2 | 91 | true, 0xffffffff,0xffffffff, false), |
c94cb026 | 92 | HOWTO (BFD_RELOC_NS32K_IMM_8_PCREL, 0, 1, 8, true, 0, complain_overflow_signed, |
7920ce38 | 93 | _bfd_ns32k_reloc_imm, "PCREL_NS32K_IMM_8", |
0a1b45a2 | 94 | true, 0x000000ff, 0x000000ff, false), |
c94cb026 | 95 | HOWTO (BFD_RELOC_NS32K_IMM_16_PCREL, 0, 2, 16, true, 0, complain_overflow_signed, |
7920ce38 | 96 | _bfd_ns32k_reloc_imm, "PCREL_NS32K_IMM_16", |
0a1b45a2 | 97 | true, 0x0000ffff,0x0000ffff, false), |
c94cb026 | 98 | HOWTO (BFD_RELOC_NS32K_IMM_32_PCREL, 0, 4, 32, true, 0, complain_overflow_signed, |
7920ce38 | 99 | _bfd_ns32k_reloc_imm, "PCREL_NS32K_IMM_32", |
0a1b45a2 | 100 | true, 0xffffffff,0xffffffff, false), |
7920ce38 NC |
101 | |
102 | /* ns32k displacements. */ | |
c94cb026 | 103 | HOWTO (BFD_RELOC_NS32K_DISP_8, 0, 1, 7, false, 0, complain_overflow_signed, |
7920ce38 | 104 | _bfd_ns32k_reloc_disp, "NS32K_DISP_8", |
0a1b45a2 | 105 | true, 0x000000ff,0x000000ff, false), |
c94cb026 | 106 | HOWTO (BFD_RELOC_NS32K_DISP_16, 0, 2, 14, false, 0, complain_overflow_signed, |
7920ce38 | 107 | _bfd_ns32k_reloc_disp, "NS32K_DISP_16", |
0a1b45a2 | 108 | true, 0x0000ffff, 0x0000ffff, false), |
c94cb026 | 109 | HOWTO (BFD_RELOC_NS32K_DISP_32, 0, 4, 30, false, 0, complain_overflow_signed, |
7920ce38 | 110 | _bfd_ns32k_reloc_disp, "NS32K_DISP_32", |
0a1b45a2 | 111 | true, 0xffffffff, 0xffffffff, false), |
c94cb026 | 112 | HOWTO (BFD_RELOC_NS32K_DISP_8_PCREL, 0, 1, 7, true, 0, complain_overflow_signed, |
1725a96e | 113 | _bfd_ns32k_reloc_disp, "PCREL_NS32K_DISP_8", |
0a1b45a2 | 114 | true, 0x000000ff,0x000000ff, false), |
c94cb026 | 115 | HOWTO (BFD_RELOC_NS32K_DISP_16_PCREL, 0, 2, 14, true, 0, complain_overflow_signed, |
7920ce38 | 116 | _bfd_ns32k_reloc_disp, "PCREL_NS32K_DISP_16", |
0a1b45a2 | 117 | true, 0x0000ffff,0x0000ffff, false), |
c94cb026 | 118 | HOWTO (BFD_RELOC_NS32K_DISP_32_PCREL, 0, 4, 30, true, 0, complain_overflow_signed, |
7920ce38 | 119 | _bfd_ns32k_reloc_disp, "PCREL_NS32K_DISP_32", |
0a1b45a2 | 120 | true, 0xffffffff,0xffffffff, false), |
7920ce38 NC |
121 | |
122 | /* Normal 2's complement. */ | |
c94cb026 | 123 | HOWTO (BFD_RELOC_8, 0, 1, 8, false, 0, complain_overflow_bitfield,0, |
0a1b45a2 | 124 | "8", true, 0x000000ff,0x000000ff, false), |
c94cb026 | 125 | HOWTO (BFD_RELOC_16, 0, 2, 16, false, 0, complain_overflow_bitfield,0, |
0a1b45a2 | 126 | "16", true, 0x0000ffff,0x0000ffff, false), |
c94cb026 | 127 | HOWTO (BFD_RELOC_32, 0, 4, 32, false, 0, complain_overflow_bitfield,0, |
0a1b45a2 | 128 | "32", true, 0xffffffff,0xffffffff, false), |
c94cb026 | 129 | HOWTO (BFD_RELOC_8_PCREL, 0, 1, 8, true, 0, complain_overflow_signed, 0, |
0a1b45a2 | 130 | "PCREL_8", true, 0x000000ff,0x000000ff, false), |
c94cb026 | 131 | HOWTO (BFD_RELOC_16_PCREL, 0, 2, 16, true, 0, complain_overflow_signed, 0, |
0a1b45a2 | 132 | "PCREL_16", true, 0x0000ffff,0x0000ffff, false), |
c94cb026 | 133 | HOWTO (BFD_RELOC_32_PCREL, 0, 4, 32, true, 0, complain_overflow_signed, 0, |
0a1b45a2 | 134 | "PCREL_32", true, 0xffffffff,0xffffffff, false), |
7920ce38 NC |
135 | }; |
136 | ||
137 | #define CTOR_TABLE_RELOC_HOWTO(BFD) (MY (howto_table) + 14) | |
138 | ||
07d6d2b8 AM |
139 | #define RELOC_STD_BITS_NS32K_TYPE_BIG 0x06 |
140 | #define RELOC_STD_BITS_NS32K_TYPE_LITTLE 0x60 | |
141 | #define RELOC_STD_BITS_NS32K_TYPE_SH_BIG 1 | |
142 | #define RELOC_STD_BITS_NS32K_TYPE_SH_LITTLE 5 | |
7920ce38 NC |
143 | |
144 | static reloc_howto_type * | |
145 | MY (reloc_howto) (bfd *abfd ATTRIBUTE_UNUSED, | |
146 | struct reloc_std_external *rel, | |
0a6041ce | 147 | unsigned int *r_index, |
7920ce38 NC |
148 | int *r_extern, |
149 | int *r_pcrel) | |
252b5132 RH |
150 | { |
151 | unsigned int r_length; | |
0a6041ce | 152 | unsigned int r_ns32k_type; |
1725a96e | 153 | |
252b5132 RH |
154 | *r_index = ((rel->r_index[2] << 16) |
155 | | (rel->r_index[1] << 8) | |
156 | | rel->r_index[0] ); | |
157 | *r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE)); | |
158 | *r_pcrel = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE)); | |
159 | r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE) | |
160 | >> RELOC_STD_BITS_LENGTH_SH_LITTLE); | |
161 | r_ns32k_type = ((rel->r_type[0] & RELOC_STD_BITS_NS32K_TYPE_LITTLE) | |
162 | >> RELOC_STD_BITS_NS32K_TYPE_SH_LITTLE); | |
0a6041ce AM |
163 | if (r_length > 2 || r_ns32k_type > 2) |
164 | return NULL; | |
7920ce38 | 165 | return (MY (howto_table) + r_length + 3 * (*r_pcrel) + 6 * r_ns32k_type); |
252b5132 RH |
166 | } |
167 | ||
dc810e39 | 168 | #define MY_reloc_howto(BFD, REL, IN, EX, PC) \ |
7920ce38 NC |
169 | MY (reloc_howto) (BFD, REL, &IN, &EX, &PC) |
170 | ||
171 | static void | |
172 | MY (put_reloc) (bfd *abfd, | |
173 | int r_extern, | |
174 | int r_index, | |
175 | bfd_vma value, | |
176 | reloc_howto_type *howto, | |
177 | struct reloc_std_external *reloc) | |
252b5132 RH |
178 | { |
179 | unsigned int r_length; | |
180 | int r_pcrel; | |
181 | int r_ns32k_type; | |
1725a96e | 182 | |
252b5132 | 183 | PUT_WORD (abfd, value, reloc->r_address); |
57698478 | 184 | r_length = bfd_log2 (bfd_get_reloc_size (howto)); |
1725a96e | 185 | r_pcrel = (int) howto->pc_relative; /* Relative to PC? */ |
7920ce38 | 186 | r_ns32k_type = (howto - MY (howto_table) )/6; |
1725a96e | 187 | |
252b5132 RH |
188 | reloc->r_index[2] = r_index >> 16; |
189 | reloc->r_index[1] = r_index >> 8; | |
190 | reloc->r_index[0] = r_index; | |
191 | reloc->r_type[0] = | |
192 | (r_extern? RELOC_STD_BITS_EXTERN_LITTLE: 0) | |
193 | | (r_pcrel? RELOC_STD_BITS_PCREL_LITTLE: 0) | |
194 | | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE) | |
195 | | (r_ns32k_type << RELOC_STD_BITS_NS32K_TYPE_SH_LITTLE); | |
196 | } | |
197 | ||
198 | #define MY_put_reloc(BFD, EXT, IDX, VAL, HOWTO, RELOC) \ | |
7920ce38 | 199 | MY (put_reloc) (BFD, EXT, IDX, VAL, HOWTO, RELOC) |
252b5132 RH |
200 | |
201 | #define STAT_FOR_EXEC | |
202 | ||
203 | #define MY_final_link_relocate _bfd_ns32k_final_link_relocate | |
7920ce38 NC |
204 | #define MY_relocate_contents _bfd_ns32k_relocate_contents |
205 | ||
206 | static void MY_swap_std_reloc_in (bfd *, struct reloc_std_external *, arelent *, asymbol **, bfd_size_type); | |
207 | static void MY_swap_std_reloc_out (bfd *, arelent *, struct reloc_std_external *); | |
252b5132 | 208 | |
dc810e39 | 209 | #include "aoutx.h" |
252b5132 RH |
210 | |
211 | reloc_howto_type * | |
7920ce38 | 212 | MY (bfd_reloc_type_lookup) (bfd *abfd, bfd_reloc_code_real_type code) |
252b5132 | 213 | { |
7920ce38 | 214 | #define ENTRY(i,j) case i: return &MY (howto_table)[j] |
252b5132 RH |
215 | |
216 | int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE; | |
217 | ||
7920ce38 | 218 | BFD_ASSERT (ext == 0); |
252b5132 | 219 | if (code == BFD_RELOC_CTOR) |
30d10e9e | 220 | switch (bfd_arch_bits_per_address (abfd)) |
252b5132 RH |
221 | { |
222 | case 32: | |
223 | code = BFD_RELOC_32; | |
224 | break; | |
1725a96e NC |
225 | default: |
226 | break; | |
252b5132 RH |
227 | } |
228 | switch (code) | |
229 | { | |
7920ce38 NC |
230 | ENTRY (BFD_RELOC_NS32K_IMM_8, 0); |
231 | ENTRY (BFD_RELOC_NS32K_IMM_16, 1); | |
232 | ENTRY (BFD_RELOC_NS32K_IMM_32, 2); | |
233 | ENTRY (BFD_RELOC_NS32K_IMM_8_PCREL, 3); | |
234 | ENTRY (BFD_RELOC_NS32K_IMM_16_PCREL, 4); | |
235 | ENTRY (BFD_RELOC_NS32K_IMM_32_PCREL, 5); | |
236 | ENTRY (BFD_RELOC_NS32K_DISP_8, 6); | |
237 | ENTRY (BFD_RELOC_NS32K_DISP_16, 7); | |
238 | ENTRY (BFD_RELOC_NS32K_DISP_32, 8); | |
239 | ENTRY (BFD_RELOC_NS32K_DISP_8_PCREL, 9); | |
240 | ENTRY (BFD_RELOC_NS32K_DISP_16_PCREL, 10); | |
241 | ENTRY (BFD_RELOC_NS32K_DISP_32_PCREL, 11); | |
242 | ENTRY (BFD_RELOC_8, 12); | |
243 | ENTRY (BFD_RELOC_16, 13); | |
244 | ENTRY (BFD_RELOC_32, 14); | |
245 | ENTRY (BFD_RELOC_8_PCREL, 15); | |
246 | ENTRY (BFD_RELOC_16_PCREL, 16); | |
247 | ENTRY (BFD_RELOC_32_PCREL, 17); | |
1725a96e | 248 | default: |
7920ce38 | 249 | return NULL; |
252b5132 RH |
250 | } |
251 | #undef ENTRY | |
252 | } | |
253 | ||
157090f7 AM |
254 | reloc_howto_type * |
255 | MY (bfd_reloc_name_lookup) (bfd *abfd ATTRIBUTE_UNUSED, | |
256 | const char *r_name) | |
257 | { | |
258 | unsigned int i; | |
259 | ||
260 | for (i = 0; | |
261 | i < sizeof (MY (howto_table)) / sizeof (MY (howto_table)[0]); | |
262 | i++) | |
263 | if (MY (howto_table)[i].name != NULL | |
264 | && strcasecmp (MY (howto_table)[i].name, r_name) == 0) | |
265 | return &MY (howto_table)[i]; | |
266 | ||
267 | return NULL; | |
268 | } | |
269 | ||
252b5132 | 270 | static void |
7920ce38 NC |
271 | MY_swap_std_reloc_in (bfd *abfd, |
272 | struct reloc_std_external *bytes, | |
273 | arelent *cache_ptr, | |
274 | asymbol **symbols, | |
275 | bfd_size_type symcount ATTRIBUTE_UNUSED) | |
252b5132 | 276 | { |
0a6041ce | 277 | unsigned int r_index; |
252b5132 RH |
278 | int r_extern; |
279 | int r_pcrel; | |
280 | struct aoutdata *su = &(abfd->tdata.aout_data->a); | |
281 | ||
dc810e39 | 282 | cache_ptr->address = H_GET_32 (abfd, bytes->r_address); |
252b5132 | 283 | |
1725a96e | 284 | /* Now the fun stuff. */ |
7920ce38 | 285 | cache_ptr->howto = MY_reloc_howto (abfd, bytes, r_index, r_extern, r_pcrel); |
252b5132 | 286 | |
1725a96e | 287 | MOVE_ADDRESS (0); |
252b5132 RH |
288 | } |
289 | ||
290 | static void | |
7920ce38 NC |
291 | MY_swap_std_reloc_out (bfd *abfd, |
292 | arelent *g, | |
293 | struct reloc_std_external *natptr) | |
252b5132 RH |
294 | { |
295 | int r_index; | |
296 | asymbol *sym = *(g->sym_ptr_ptr); | |
297 | int r_extern; | |
252b5132 RH |
298 | asection *output_section = sym->section->output_section; |
299 | ||
1725a96e | 300 | /* Name was clobbered by aout_write_syms to be symbol index. */ |
252b5132 | 301 | |
c4dfa77f | 302 | /* If this relocation is relative to a symbol then set the |
252b5132 RH |
303 | r_index to the symbols index, and the r_extern bit. |
304 | ||
305 | Absolute symbols can come in in two ways, either as an offset | |
306 | from the abs section, or as a symbol which has an abs value. | |
307 | Check for that here. */ | |
252b5132 | 308 | if (bfd_is_com_section (output_section) |
45dfa85a AM |
309 | || bfd_is_abs_section (output_section) |
310 | || bfd_is_und_section (output_section)) | |
252b5132 | 311 | { |
45dfa85a | 312 | if (bfd_abs_section_ptr->symbol == sym) |
252b5132 RH |
313 | { |
314 | /* Whoops, looked like an abs symbol, but is really an offset | |
1725a96e | 315 | from the abs section. */ |
252b5132 RH |
316 | r_index = 0; |
317 | r_extern = 0; | |
318 | } | |
c4dfa77f | 319 | else |
252b5132 | 320 | { |
1725a96e | 321 | /* Fill in symbol. */ |
252b5132 RH |
322 | r_extern = 1; |
323 | #undef KEEPIT | |
324 | #define KEEPIT udata.i | |
325 | r_index = (*(g->sym_ptr_ptr))->KEEPIT; | |
c4dfa77f | 326 | #undef KEEPIT |
252b5132 RH |
327 | } |
328 | } | |
c4dfa77f | 329 | else |
252b5132 | 330 | { |
1725a96e | 331 | /* Just an ordinary section. */ |
252b5132 | 332 | r_extern = 0; |
c4dfa77f | 333 | r_index = output_section->target_index; |
252b5132 RH |
334 | } |
335 | ||
336 | MY_put_reloc (abfd, r_extern, r_index, g->address, g->howto, natptr); | |
337 | } | |
338 | ||
339 | bfd_reloc_status_type | |
7920ce38 NC |
340 | _bfd_ns32k_relocate_contents (reloc_howto_type *howto, |
341 | bfd *input_bfd, | |
342 | bfd_vma relocation, | |
343 | bfd_byte *location) | |
252b5132 | 344 | { |
7920ce38 NC |
345 | int r_ns32k_type = (howto - MY (howto_table)) / 6; |
346 | bfd_vma (*get_data) (bfd_byte *, int); | |
347 | void (*put_data) (bfd_vma, bfd_byte *, int); | |
252b5132 RH |
348 | |
349 | switch (r_ns32k_type) | |
350 | { | |
351 | case 0: | |
352 | get_data = _bfd_ns32k_get_immediate; | |
353 | put_data = _bfd_ns32k_put_immediate; | |
354 | break; | |
355 | case 1: | |
356 | get_data = _bfd_ns32k_get_displacement; | |
357 | put_data = _bfd_ns32k_put_displacement; | |
358 | break; | |
359 | case 2: | |
360 | return _bfd_relocate_contents (howto, input_bfd, relocation, | |
361 | location); | |
252b5132 RH |
362 | default: |
363 | return bfd_reloc_notsupported; | |
364 | } | |
365 | return _bfd_do_ns32k_reloc_contents (howto, input_bfd, relocation, | |
366 | location, get_data, put_data); | |
367 | } |