Commit | Line | Data |
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252b5132 | 1 | /* BFD back-end for ns32k a.out-ish binaries. |
9553c638 | 2 | Copyright 1990, 1991, 1992, 1994, 1995, 1996, 1998, 1999, 2000, 2001, |
45dfa85a | 3 | 2002, 2003, 2005, 2006, 2007, 2010, 2012 Free Software Foundation, Inc. |
252b5132 RH |
4 | Contributed by Ian Dall (idall@eleceng.adelaide.edu.au). |
5 | ||
4eb6b71c | 6 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 7 | |
4eb6b71c NC |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 10 | the Free Software Foundation; either version 3 of the License, or |
4eb6b71c | 11 | (at your option) any later version. |
252b5132 | 12 | |
4eb6b71c NC |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
252b5132 | 17 | |
4eb6b71c NC |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
21 | MA 02110-1301, USA. */ | |
252b5132 | 22 | |
691bf19c | 23 | #include "sysdep.h" |
252b5132 RH |
24 | #include "bfd.h" |
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. */ | |
31 | #define MYNS(OP) CONCAT2 (ns32kaout_,OP) | |
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 *); | |
35 | bfd_boolean 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 NC |
70 | self: movd @self, r0 # pc relative displacement |
71 | movd foo, r0 # non pc relative displacement | |
72 | ||
73 | self: movd self, r0 # pc relative immediate | |
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. */ | |
83 | HOWTO (BFD_RELOC_NS32K_IMM_8, 0, 0, 8, FALSE, 0, complain_overflow_signed, | |
84 | _bfd_ns32k_reloc_imm, "NS32K_IMM_8", | |
85 | TRUE, 0x000000ff,0x000000ff, FALSE), | |
86 | HOWTO (BFD_RELOC_NS32K_IMM_16, 0, 1, 16, FALSE, 0, complain_overflow_signed, | |
87 | _bfd_ns32k_reloc_imm, "NS32K_IMM_16", | |
88 | TRUE, 0x0000ffff,0x0000ffff, FALSE), | |
89 | HOWTO (BFD_RELOC_NS32K_IMM_32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
90 | _bfd_ns32k_reloc_imm, "NS32K_IMM_32", | |
91 | TRUE, 0xffffffff,0xffffffff, FALSE), | |
92 | HOWTO (BFD_RELOC_NS32K_IMM_8_PCREL, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
93 | _bfd_ns32k_reloc_imm, "PCREL_NS32K_IMM_8", | |
94 | TRUE, 0x000000ff, 0x000000ff, FALSE), | |
95 | HOWTO (BFD_RELOC_NS32K_IMM_16_PCREL, 0, 1, 16, TRUE, 0, complain_overflow_signed, | |
96 | _bfd_ns32k_reloc_imm, "PCREL_NS32K_IMM_16", | |
97 | TRUE, 0x0000ffff,0x0000ffff, FALSE), | |
98 | HOWTO (BFD_RELOC_NS32K_IMM_32_PCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
99 | _bfd_ns32k_reloc_imm, "PCREL_NS32K_IMM_32", | |
100 | TRUE, 0xffffffff,0xffffffff, FALSE), | |
101 | ||
102 | /* ns32k displacements. */ | |
103 | HOWTO (BFD_RELOC_NS32K_DISP_8, 0, 0, 7, FALSE, 0, complain_overflow_signed, | |
104 | _bfd_ns32k_reloc_disp, "NS32K_DISP_8", | |
105 | TRUE, 0x000000ff,0x000000ff, FALSE), | |
106 | HOWTO (BFD_RELOC_NS32K_DISP_16, 0, 1, 14, FALSE, 0, complain_overflow_signed, | |
107 | _bfd_ns32k_reloc_disp, "NS32K_DISP_16", | |
108 | TRUE, 0x0000ffff, 0x0000ffff, FALSE), | |
109 | HOWTO (BFD_RELOC_NS32K_DISP_32, 0, 2, 30, FALSE, 0, complain_overflow_signed, | |
110 | _bfd_ns32k_reloc_disp, "NS32K_DISP_32", | |
111 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
112 | HOWTO (BFD_RELOC_NS32K_DISP_8_PCREL, 0, 0, 7, TRUE, 0, complain_overflow_signed, | |
1725a96e | 113 | _bfd_ns32k_reloc_disp, "PCREL_NS32K_DISP_8", |
7920ce38 NC |
114 | TRUE, 0x000000ff,0x000000ff, FALSE), |
115 | HOWTO (BFD_RELOC_NS32K_DISP_16_PCREL, 0, 1, 14, TRUE, 0, complain_overflow_signed, | |
116 | _bfd_ns32k_reloc_disp, "PCREL_NS32K_DISP_16", | |
117 | TRUE, 0x0000ffff,0x0000ffff, FALSE), | |
118 | HOWTO (BFD_RELOC_NS32K_DISP_32_PCREL, 0, 2, 30, TRUE, 0, complain_overflow_signed, | |
119 | _bfd_ns32k_reloc_disp, "PCREL_NS32K_DISP_32", | |
120 | TRUE, 0xffffffff,0xffffffff, FALSE), | |
121 | ||
122 | /* Normal 2's complement. */ | |
123 | HOWTO (BFD_RELOC_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,0, | |
124 | "8", TRUE, 0x000000ff,0x000000ff, FALSE), | |
125 | HOWTO (BFD_RELOC_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,0, | |
126 | "16", TRUE, 0x0000ffff,0x0000ffff, FALSE), | |
127 | HOWTO (BFD_RELOC_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,0, | |
128 | "32", TRUE, 0xffffffff,0xffffffff, FALSE), | |
129 | HOWTO (BFD_RELOC_8_PCREL, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0, | |
130 | "PCREL_8", TRUE, 0x000000ff,0x000000ff, FALSE), | |
131 | HOWTO (BFD_RELOC_16_PCREL, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0, | |
132 | "PCREL_16", TRUE, 0x0000ffff,0x0000ffff, FALSE), | |
133 | HOWTO (BFD_RELOC_32_PCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0, | |
134 | "PCREL_32", TRUE, 0xffffffff,0xffffffff, FALSE), | |
135 | }; | |
136 | ||
137 | #define CTOR_TABLE_RELOC_HOWTO(BFD) (MY (howto_table) + 14) | |
138 | ||
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 | |
143 | ||
144 | static reloc_howto_type * | |
145 | MY (reloc_howto) (bfd *abfd ATTRIBUTE_UNUSED, | |
146 | struct reloc_std_external *rel, | |
147 | int *r_index, | |
148 | int *r_extern, | |
149 | int *r_pcrel) | |
252b5132 RH |
150 | { |
151 | unsigned int r_length; | |
152 | 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); | |
7920ce38 | 163 | return (MY (howto_table) + r_length + 3 * (*r_pcrel) + 6 * r_ns32k_type); |
252b5132 RH |
164 | } |
165 | ||
dc810e39 | 166 | #define MY_reloc_howto(BFD, REL, IN, EX, PC) \ |
7920ce38 NC |
167 | MY (reloc_howto) (BFD, REL, &IN, &EX, &PC) |
168 | ||
169 | static void | |
170 | MY (put_reloc) (bfd *abfd, | |
171 | int r_extern, | |
172 | int r_index, | |
173 | bfd_vma value, | |
174 | reloc_howto_type *howto, | |
175 | struct reloc_std_external *reloc) | |
252b5132 RH |
176 | { |
177 | unsigned int r_length; | |
178 | int r_pcrel; | |
179 | int r_ns32k_type; | |
1725a96e | 180 | |
252b5132 | 181 | PUT_WORD (abfd, value, reloc->r_address); |
1725a96e NC |
182 | r_length = howto->size ; /* Size as a power of two. */ |
183 | r_pcrel = (int) howto->pc_relative; /* Relative to PC? */ | |
7920ce38 | 184 | r_ns32k_type = (howto - MY (howto_table) )/6; |
1725a96e | 185 | |
252b5132 RH |
186 | reloc->r_index[2] = r_index >> 16; |
187 | reloc->r_index[1] = r_index >> 8; | |
188 | reloc->r_index[0] = r_index; | |
189 | reloc->r_type[0] = | |
190 | (r_extern? RELOC_STD_BITS_EXTERN_LITTLE: 0) | |
191 | | (r_pcrel? RELOC_STD_BITS_PCREL_LITTLE: 0) | |
192 | | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE) | |
193 | | (r_ns32k_type << RELOC_STD_BITS_NS32K_TYPE_SH_LITTLE); | |
194 | } | |
195 | ||
196 | #define MY_put_reloc(BFD, EXT, IDX, VAL, HOWTO, RELOC) \ | |
7920ce38 | 197 | MY (put_reloc) (BFD, EXT, IDX, VAL, HOWTO, RELOC) |
252b5132 RH |
198 | |
199 | #define STAT_FOR_EXEC | |
200 | ||
201 | #define MY_final_link_relocate _bfd_ns32k_final_link_relocate | |
7920ce38 NC |
202 | #define MY_relocate_contents _bfd_ns32k_relocate_contents |
203 | ||
204 | static void MY_swap_std_reloc_in (bfd *, struct reloc_std_external *, arelent *, asymbol **, bfd_size_type); | |
205 | static void MY_swap_std_reloc_out (bfd *, arelent *, struct reloc_std_external *); | |
252b5132 | 206 | |
dc810e39 | 207 | #include "aoutx.h" |
252b5132 RH |
208 | |
209 | reloc_howto_type * | |
7920ce38 | 210 | MY (bfd_reloc_type_lookup) (bfd *abfd, bfd_reloc_code_real_type code) |
252b5132 | 211 | { |
7920ce38 | 212 | #define ENTRY(i,j) case i: return &MY (howto_table)[j] |
252b5132 RH |
213 | |
214 | int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE; | |
215 | ||
7920ce38 | 216 | BFD_ASSERT (ext == 0); |
252b5132 | 217 | if (code == BFD_RELOC_CTOR) |
30d10e9e | 218 | switch (bfd_arch_bits_per_address (abfd)) |
252b5132 RH |
219 | { |
220 | case 32: | |
221 | code = BFD_RELOC_32; | |
222 | break; | |
1725a96e NC |
223 | default: |
224 | break; | |
252b5132 RH |
225 | } |
226 | switch (code) | |
227 | { | |
7920ce38 NC |
228 | ENTRY (BFD_RELOC_NS32K_IMM_8, 0); |
229 | ENTRY (BFD_RELOC_NS32K_IMM_16, 1); | |
230 | ENTRY (BFD_RELOC_NS32K_IMM_32, 2); | |
231 | ENTRY (BFD_RELOC_NS32K_IMM_8_PCREL, 3); | |
232 | ENTRY (BFD_RELOC_NS32K_IMM_16_PCREL, 4); | |
233 | ENTRY (BFD_RELOC_NS32K_IMM_32_PCREL, 5); | |
234 | ENTRY (BFD_RELOC_NS32K_DISP_8, 6); | |
235 | ENTRY (BFD_RELOC_NS32K_DISP_16, 7); | |
236 | ENTRY (BFD_RELOC_NS32K_DISP_32, 8); | |
237 | ENTRY (BFD_RELOC_NS32K_DISP_8_PCREL, 9); | |
238 | ENTRY (BFD_RELOC_NS32K_DISP_16_PCREL, 10); | |
239 | ENTRY (BFD_RELOC_NS32K_DISP_32_PCREL, 11); | |
240 | ENTRY (BFD_RELOC_8, 12); | |
241 | ENTRY (BFD_RELOC_16, 13); | |
242 | ENTRY (BFD_RELOC_32, 14); | |
243 | ENTRY (BFD_RELOC_8_PCREL, 15); | |
244 | ENTRY (BFD_RELOC_16_PCREL, 16); | |
245 | ENTRY (BFD_RELOC_32_PCREL, 17); | |
1725a96e | 246 | default: |
7920ce38 | 247 | return NULL; |
252b5132 RH |
248 | } |
249 | #undef ENTRY | |
250 | } | |
251 | ||
157090f7 AM |
252 | reloc_howto_type * |
253 | MY (bfd_reloc_name_lookup) (bfd *abfd ATTRIBUTE_UNUSED, | |
254 | const char *r_name) | |
255 | { | |
256 | unsigned int i; | |
257 | ||
258 | for (i = 0; | |
259 | i < sizeof (MY (howto_table)) / sizeof (MY (howto_table)[0]); | |
260 | i++) | |
261 | if (MY (howto_table)[i].name != NULL | |
262 | && strcasecmp (MY (howto_table)[i].name, r_name) == 0) | |
263 | return &MY (howto_table)[i]; | |
264 | ||
265 | return NULL; | |
266 | } | |
267 | ||
252b5132 | 268 | static void |
7920ce38 NC |
269 | MY_swap_std_reloc_in (bfd *abfd, |
270 | struct reloc_std_external *bytes, | |
271 | arelent *cache_ptr, | |
272 | asymbol **symbols, | |
273 | bfd_size_type symcount ATTRIBUTE_UNUSED) | |
252b5132 RH |
274 | { |
275 | int r_index; | |
276 | int r_extern; | |
277 | int r_pcrel; | |
278 | struct aoutdata *su = &(abfd->tdata.aout_data->a); | |
279 | ||
dc810e39 | 280 | cache_ptr->address = H_GET_32 (abfd, bytes->r_address); |
252b5132 | 281 | |
1725a96e | 282 | /* Now the fun stuff. */ |
7920ce38 | 283 | cache_ptr->howto = MY_reloc_howto (abfd, bytes, r_index, r_extern, r_pcrel); |
252b5132 | 284 | |
1725a96e | 285 | MOVE_ADDRESS (0); |
252b5132 RH |
286 | } |
287 | ||
288 | static void | |
7920ce38 NC |
289 | MY_swap_std_reloc_out (bfd *abfd, |
290 | arelent *g, | |
291 | struct reloc_std_external *natptr) | |
252b5132 RH |
292 | { |
293 | int r_index; | |
294 | asymbol *sym = *(g->sym_ptr_ptr); | |
295 | int r_extern; | |
252b5132 RH |
296 | asection *output_section = sym->section->output_section; |
297 | ||
1725a96e | 298 | /* Name was clobbered by aout_write_syms to be symbol index. */ |
252b5132 | 299 | |
c4dfa77f | 300 | /* If this relocation is relative to a symbol then set the |
252b5132 RH |
301 | r_index to the symbols index, and the r_extern bit. |
302 | ||
303 | Absolute symbols can come in in two ways, either as an offset | |
304 | from the abs section, or as a symbol which has an abs value. | |
305 | Check for that here. */ | |
252b5132 | 306 | if (bfd_is_com_section (output_section) |
45dfa85a AM |
307 | || bfd_is_abs_section (output_section) |
308 | || bfd_is_und_section (output_section)) | |
252b5132 | 309 | { |
45dfa85a | 310 | if (bfd_abs_section_ptr->symbol == sym) |
252b5132 RH |
311 | { |
312 | /* Whoops, looked like an abs symbol, but is really an offset | |
1725a96e | 313 | from the abs section. */ |
252b5132 RH |
314 | r_index = 0; |
315 | r_extern = 0; | |
316 | } | |
c4dfa77f | 317 | else |
252b5132 | 318 | { |
1725a96e | 319 | /* Fill in symbol. */ |
252b5132 RH |
320 | r_extern = 1; |
321 | #undef KEEPIT | |
322 | #define KEEPIT udata.i | |
323 | r_index = (*(g->sym_ptr_ptr))->KEEPIT; | |
c4dfa77f | 324 | #undef KEEPIT |
252b5132 RH |
325 | } |
326 | } | |
c4dfa77f | 327 | else |
252b5132 | 328 | { |
1725a96e | 329 | /* Just an ordinary section. */ |
252b5132 | 330 | r_extern = 0; |
c4dfa77f | 331 | r_index = output_section->target_index; |
252b5132 RH |
332 | } |
333 | ||
334 | MY_put_reloc (abfd, r_extern, r_index, g->address, g->howto, natptr); | |
335 | } | |
336 | ||
337 | bfd_reloc_status_type | |
7920ce38 NC |
338 | _bfd_ns32k_relocate_contents (reloc_howto_type *howto, |
339 | bfd *input_bfd, | |
340 | bfd_vma relocation, | |
341 | bfd_byte *location) | |
252b5132 | 342 | { |
7920ce38 NC |
343 | int r_ns32k_type = (howto - MY (howto_table)) / 6; |
344 | bfd_vma (*get_data) (bfd_byte *, int); | |
345 | void (*put_data) (bfd_vma, bfd_byte *, int); | |
252b5132 RH |
346 | |
347 | switch (r_ns32k_type) | |
348 | { | |
349 | case 0: | |
350 | get_data = _bfd_ns32k_get_immediate; | |
351 | put_data = _bfd_ns32k_put_immediate; | |
352 | break; | |
353 | case 1: | |
354 | get_data = _bfd_ns32k_get_displacement; | |
355 | put_data = _bfd_ns32k_put_displacement; | |
356 | break; | |
357 | case 2: | |
358 | return _bfd_relocate_contents (howto, input_bfd, relocation, | |
359 | location); | |
252b5132 RH |
360 | default: |
361 | return bfd_reloc_notsupported; | |
362 | } | |
363 | return _bfd_do_ns32k_reloc_contents (howto, input_bfd, relocation, | |
364 | location, get_data, put_data); | |
365 | } |