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1 | /* Renesas RL78 specific support for 32-bit ELF. |
2 | Copyright (C) 2011 | |
3 | Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
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 | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
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. | |
16 | ||
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 | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | #include "sysdep.h" | |
22 | #include "bfd.h" | |
23 | #include "bfd_stdint.h" | |
24 | #include "libbfd.h" | |
25 | #include "elf-bfd.h" | |
26 | #include "elf/rl78.h" | |
27 | #include "libiberty.h" | |
28 | ||
29 | #define valid_16bit_address(v) ((v) <= 0x0ffff || (v) >= 0xf0000) | |
30 | ||
31 | #define RL78REL(n,sz,bit,shift,complain,pcrel) \ | |
32 | HOWTO (R_RL78_##n, shift, sz, bit, pcrel, 0, complain_overflow_ ## complain, \ | |
33 | bfd_elf_generic_reloc, "R_RL78_" #n, FALSE, 0, ~0, FALSE) | |
34 | ||
35 | /* Note that the relocations around 0x7f are internal to this file; | |
36 | feel free to move them as needed to avoid conflicts with published | |
37 | relocation numbers. */ | |
38 | ||
39 | static reloc_howto_type rl78_elf_howto_table [] = | |
40 | { | |
41 | RL78REL (NONE, 0, 0, 0, dont, FALSE), | |
42 | RL78REL (DIR32, 2, 32, 0, signed, FALSE), | |
43 | RL78REL (DIR24S, 2, 24, 0, signed, FALSE), | |
44 | RL78REL (DIR16, 1, 16, 0, dont, FALSE), | |
45 | RL78REL (DIR16U, 1, 16, 0, unsigned, FALSE), | |
46 | RL78REL (DIR16S, 1, 16, 0, signed, FALSE), | |
47 | RL78REL (DIR8, 0, 8, 0, dont, FALSE), | |
48 | RL78REL (DIR8U, 0, 8, 0, unsigned, FALSE), | |
49 | RL78REL (DIR8S, 0, 8, 0, signed, FALSE), | |
50 | RL78REL (DIR24S_PCREL, 2, 24, 0, signed, TRUE), | |
51 | RL78REL (DIR16S_PCREL, 1, 16, 0, signed, TRUE), | |
52 | RL78REL (DIR8S_PCREL, 0, 8, 0, signed, TRUE), | |
53 | RL78REL (DIR16UL, 1, 16, 2, unsigned, FALSE), | |
54 | RL78REL (DIR16UW, 1, 16, 1, unsigned, FALSE), | |
55 | RL78REL (DIR8UL, 0, 8, 2, unsigned, FALSE), | |
56 | RL78REL (DIR8UW, 0, 8, 1, unsigned, FALSE), | |
57 | RL78REL (DIR32_REV, 1, 16, 0, dont, FALSE), | |
58 | RL78REL (DIR16_REV, 1, 16, 0, dont, FALSE), | |
59 | RL78REL (DIR3U_PCREL, 0, 3, 0, dont, TRUE), | |
60 | ||
61 | EMPTY_HOWTO (0x13), | |
62 | EMPTY_HOWTO (0x14), | |
63 | EMPTY_HOWTO (0x15), | |
64 | EMPTY_HOWTO (0x16), | |
65 | EMPTY_HOWTO (0x17), | |
66 | EMPTY_HOWTO (0x18), | |
67 | EMPTY_HOWTO (0x19), | |
68 | EMPTY_HOWTO (0x1a), | |
69 | EMPTY_HOWTO (0x1b), | |
70 | EMPTY_HOWTO (0x1c), | |
71 | EMPTY_HOWTO (0x1d), | |
72 | EMPTY_HOWTO (0x1e), | |
73 | EMPTY_HOWTO (0x1f), | |
74 | ||
75 | EMPTY_HOWTO (0x20), | |
76 | EMPTY_HOWTO (0x21), | |
77 | EMPTY_HOWTO (0x22), | |
78 | EMPTY_HOWTO (0x23), | |
79 | EMPTY_HOWTO (0x24), | |
80 | EMPTY_HOWTO (0x25), | |
81 | EMPTY_HOWTO (0x26), | |
82 | EMPTY_HOWTO (0x27), | |
83 | EMPTY_HOWTO (0x28), | |
84 | EMPTY_HOWTO (0x29), | |
85 | EMPTY_HOWTO (0x2a), | |
86 | EMPTY_HOWTO (0x2b), | |
87 | EMPTY_HOWTO (0x2c), | |
88 | EMPTY_HOWTO (0x2d), | |
89 | ||
90 | EMPTY_HOWTO (0x2e), | |
91 | EMPTY_HOWTO (0x2f), | |
92 | EMPTY_HOWTO (0x30), | |
93 | EMPTY_HOWTO (0x31), | |
94 | EMPTY_HOWTO (0x32), | |
95 | EMPTY_HOWTO (0x33), | |
96 | EMPTY_HOWTO (0x34), | |
97 | EMPTY_HOWTO (0x35), | |
98 | EMPTY_HOWTO (0x36), | |
99 | EMPTY_HOWTO (0x37), | |
100 | EMPTY_HOWTO (0x38), | |
101 | EMPTY_HOWTO (0x39), | |
102 | EMPTY_HOWTO (0x3a), | |
103 | EMPTY_HOWTO (0x3b), | |
104 | EMPTY_HOWTO (0x3c), | |
105 | EMPTY_HOWTO (0x3d), | |
106 | EMPTY_HOWTO (0x3e), | |
107 | EMPTY_HOWTO (0x3f), | |
108 | EMPTY_HOWTO (0x40), | |
109 | ||
110 | RL78REL (ABS32, 2, 32, 0, dont, FALSE), | |
111 | RL78REL (ABS24S, 2, 24, 0, signed, FALSE), | |
112 | RL78REL (ABS16, 1, 16, 0, dont, FALSE), | |
113 | RL78REL (ABS16U, 1, 16, 0, unsigned, FALSE), | |
114 | RL78REL (ABS16S, 1, 16, 0, signed, FALSE), | |
115 | RL78REL (ABS8, 0, 8, 0, dont, FALSE), | |
116 | RL78REL (ABS8U, 0, 8, 0, unsigned, FALSE), | |
117 | RL78REL (ABS8S, 0, 8, 0, signed, FALSE), | |
118 | RL78REL (ABS24S_PCREL, 2, 24, 0, signed, TRUE), | |
119 | RL78REL (ABS16S_PCREL, 1, 16, 0, signed, TRUE), | |
120 | RL78REL (ABS8S_PCREL, 0, 8, 0, signed, TRUE), | |
121 | RL78REL (ABS16UL, 1, 16, 0, unsigned, FALSE), | |
122 | RL78REL (ABS16UW, 1, 16, 0, unsigned, FALSE), | |
123 | RL78REL (ABS8UL, 0, 8, 0, unsigned, FALSE), | |
124 | RL78REL (ABS8UW, 0, 8, 0, unsigned, FALSE), | |
125 | RL78REL (ABS32_REV, 2, 32, 0, dont, FALSE), | |
126 | RL78REL (ABS16_REV, 1, 16, 0, dont, FALSE), | |
127 | ||
128 | #define STACK_REL_P(x) ((x) <= R_RL78_ABS16_REV && (x) >= R_RL78_ABS32) | |
129 | ||
130 | EMPTY_HOWTO (0x52), | |
131 | EMPTY_HOWTO (0x53), | |
132 | EMPTY_HOWTO (0x54), | |
133 | EMPTY_HOWTO (0x55), | |
134 | EMPTY_HOWTO (0x56), | |
135 | EMPTY_HOWTO (0x57), | |
136 | EMPTY_HOWTO (0x58), | |
137 | EMPTY_HOWTO (0x59), | |
138 | EMPTY_HOWTO (0x5a), | |
139 | EMPTY_HOWTO (0x5b), | |
140 | EMPTY_HOWTO (0x5c), | |
141 | EMPTY_HOWTO (0x5d), | |
142 | EMPTY_HOWTO (0x5e), | |
143 | EMPTY_HOWTO (0x5f), | |
144 | EMPTY_HOWTO (0x60), | |
145 | EMPTY_HOWTO (0x61), | |
146 | EMPTY_HOWTO (0x62), | |
147 | EMPTY_HOWTO (0x63), | |
148 | EMPTY_HOWTO (0x64), | |
149 | EMPTY_HOWTO (0x65), | |
150 | EMPTY_HOWTO (0x66), | |
151 | EMPTY_HOWTO (0x67), | |
152 | EMPTY_HOWTO (0x68), | |
153 | EMPTY_HOWTO (0x69), | |
154 | EMPTY_HOWTO (0x6a), | |
155 | EMPTY_HOWTO (0x6b), | |
156 | EMPTY_HOWTO (0x6c), | |
157 | EMPTY_HOWTO (0x6d), | |
158 | EMPTY_HOWTO (0x6e), | |
159 | EMPTY_HOWTO (0x6f), | |
160 | EMPTY_HOWTO (0x70), | |
161 | EMPTY_HOWTO (0x71), | |
162 | EMPTY_HOWTO (0x72), | |
163 | EMPTY_HOWTO (0x73), | |
164 | EMPTY_HOWTO (0x74), | |
165 | EMPTY_HOWTO (0x75), | |
166 | EMPTY_HOWTO (0x76), | |
167 | EMPTY_HOWTO (0x77), | |
168 | ||
169 | EMPTY_HOWTO (0x78), | |
170 | EMPTY_HOWTO (0x79), | |
171 | EMPTY_HOWTO (0x7a), | |
172 | EMPTY_HOWTO (0x7b), | |
173 | EMPTY_HOWTO (0x7c), | |
174 | EMPTY_HOWTO (0x7d), | |
175 | EMPTY_HOWTO (0x7e), | |
176 | EMPTY_HOWTO (0x7f), | |
177 | ||
178 | RL78REL (SYM, 2, 32, 0, dont, FALSE), | |
179 | RL78REL (OPneg, 2, 32, 0, dont, FALSE), | |
180 | RL78REL (OPadd, 2, 32, 0, dont, FALSE), | |
181 | RL78REL (OPsub, 2, 32, 0, dont, FALSE), | |
182 | RL78REL (OPmul, 2, 32, 0, dont, FALSE), | |
183 | RL78REL (OPdiv, 2, 32, 0, dont, FALSE), | |
184 | RL78REL (OPshla, 2, 32, 0, dont, FALSE), | |
185 | RL78REL (OPshra, 2, 32, 0, dont, FALSE), | |
186 | RL78REL (OPsctsize, 2, 32, 0, dont, FALSE), | |
187 | EMPTY_HOWTO (0x89), | |
188 | EMPTY_HOWTO (0x8a), | |
189 | EMPTY_HOWTO (0x8b), | |
190 | EMPTY_HOWTO (0x8c), | |
191 | RL78REL (OPscttop, 2, 32, 0, dont, FALSE), | |
192 | EMPTY_HOWTO (0x8e), | |
193 | EMPTY_HOWTO (0x8f), | |
194 | RL78REL (OPand, 2, 32, 0, dont, FALSE), | |
195 | RL78REL (OPor, 2, 32, 0, dont, FALSE), | |
196 | RL78REL (OPxor, 2, 32, 0, dont, FALSE), | |
197 | RL78REL (OPnot, 2, 32, 0, dont, FALSE), | |
198 | RL78REL (OPmod, 2, 32, 0, dont, FALSE), | |
199 | RL78REL (OPromtop, 2, 32, 0, dont, FALSE), | |
200 | RL78REL (OPramtop, 2, 32, 0, dont, FALSE) | |
201 | }; | |
202 | \f | |
203 | /* Map BFD reloc types to RL78 ELF reloc types. */ | |
204 | ||
205 | struct rl78_reloc_map | |
206 | { | |
207 | bfd_reloc_code_real_type bfd_reloc_val; | |
208 | unsigned int rl78_reloc_val; | |
209 | }; | |
210 | ||
211 | static const struct rl78_reloc_map rl78_reloc_map [] = | |
212 | { | |
213 | { BFD_RELOC_NONE, R_RL78_NONE }, | |
214 | { BFD_RELOC_8, R_RL78_DIR8S }, | |
215 | { BFD_RELOC_16, R_RL78_DIR16S }, | |
216 | { BFD_RELOC_24, R_RL78_DIR24S }, | |
217 | { BFD_RELOC_32, R_RL78_DIR32 }, | |
218 | { BFD_RELOC_RL78_16_OP, R_RL78_DIR16 }, | |
219 | { BFD_RELOC_RL78_DIR3U_PCREL, R_RL78_DIR3U_PCREL }, | |
220 | { BFD_RELOC_8_PCREL, R_RL78_DIR8S_PCREL }, | |
221 | { BFD_RELOC_16_PCREL, R_RL78_DIR16S_PCREL }, | |
222 | { BFD_RELOC_24_PCREL, R_RL78_DIR24S_PCREL }, | |
223 | { BFD_RELOC_RL78_8U, R_RL78_DIR8U }, | |
224 | { BFD_RELOC_RL78_16U, R_RL78_DIR16U }, | |
225 | { BFD_RELOC_RL78_SYM, R_RL78_SYM }, | |
226 | { BFD_RELOC_RL78_OP_SUBTRACT, R_RL78_OPsub }, | |
227 | { BFD_RELOC_RL78_OP_NEG, R_RL78_OPneg }, | |
228 | { BFD_RELOC_RL78_OP_AND, R_RL78_OPand }, | |
229 | { BFD_RELOC_RL78_OP_SHRA, R_RL78_OPshra }, | |
230 | { BFD_RELOC_RL78_ABS8, R_RL78_ABS8 }, | |
231 | { BFD_RELOC_RL78_ABS16, R_RL78_ABS16 }, | |
232 | { BFD_RELOC_RL78_ABS16_REV, R_RL78_ABS16_REV }, | |
233 | { BFD_RELOC_RL78_ABS32, R_RL78_ABS32 }, | |
234 | { BFD_RELOC_RL78_ABS32_REV, R_RL78_ABS32_REV }, | |
235 | { BFD_RELOC_RL78_ABS16UL, R_RL78_ABS16UL }, | |
236 | { BFD_RELOC_RL78_ABS16UW, R_RL78_ABS16UW }, | |
237 | { BFD_RELOC_RL78_ABS16U, R_RL78_ABS16U } | |
238 | }; | |
239 | ||
240 | static reloc_howto_type * | |
241 | rl78_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, | |
242 | bfd_reloc_code_real_type code) | |
243 | { | |
244 | unsigned int i; | |
245 | ||
246 | if (code == BFD_RELOC_RL78_32_OP) | |
247 | return rl78_elf_howto_table + R_RL78_DIR32; | |
248 | ||
249 | for (i = ARRAY_SIZE (rl78_reloc_map); --i;) | |
250 | if (rl78_reloc_map [i].bfd_reloc_val == code) | |
251 | return rl78_elf_howto_table + rl78_reloc_map[i].rl78_reloc_val; | |
252 | ||
253 | return NULL; | |
254 | } | |
255 | ||
256 | static reloc_howto_type * | |
257 | rl78_reloc_name_lookup (bfd * abfd ATTRIBUTE_UNUSED, const char * r_name) | |
258 | { | |
259 | unsigned int i; | |
260 | ||
261 | for (i = 0; i < ARRAY_SIZE (rl78_elf_howto_table); i++) | |
262 | if (rl78_elf_howto_table[i].name != NULL | |
263 | && strcasecmp (rl78_elf_howto_table[i].name, r_name) == 0) | |
264 | return rl78_elf_howto_table + i; | |
265 | ||
266 | return NULL; | |
267 | } | |
268 | ||
269 | /* Set the howto pointer for an RL78 ELF reloc. */ | |
270 | ||
271 | static void | |
272 | rl78_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED, | |
273 | arelent * cache_ptr, | |
274 | Elf_Internal_Rela * dst) | |
275 | { | |
276 | unsigned int r_type; | |
277 | ||
278 | r_type = ELF32_R_TYPE (dst->r_info); | |
279 | BFD_ASSERT (r_type < (unsigned int) R_RL78_max); | |
280 | cache_ptr->howto = rl78_elf_howto_table + r_type; | |
281 | } | |
282 | \f | |
283 | static bfd_vma | |
284 | get_symbol_value (const char * name, | |
285 | bfd_reloc_status_type * status, | |
286 | struct bfd_link_info * info, | |
287 | bfd * input_bfd, | |
288 | asection * input_section, | |
289 | int offset) | |
290 | { | |
291 | bfd_vma value = 0; | |
292 | struct bfd_link_hash_entry * h; | |
293 | ||
294 | h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); | |
295 | ||
296 | if (h == NULL | |
297 | || (h->type != bfd_link_hash_defined | |
298 | && h->type != bfd_link_hash_defweak)) | |
299 | * status = info->callbacks->undefined_symbol | |
300 | (info, name, input_bfd, input_section, offset, TRUE); | |
301 | else | |
302 | value = (h->u.def.value | |
303 | + h->u.def.section->output_section->vma | |
304 | + h->u.def.section->output_offset); | |
305 | ||
306 | return value; | |
307 | } | |
308 | ||
309 | static bfd_vma | |
310 | get_romstart (bfd_reloc_status_type * status, | |
311 | struct bfd_link_info * info, | |
312 | bfd * abfd, | |
313 | asection * sec, | |
314 | int offset) | |
315 | { | |
316 | static bfd_boolean cached = FALSE; | |
317 | static bfd_vma cached_value = 0; | |
318 | ||
319 | if (!cached) | |
320 | { | |
321 | cached_value = get_symbol_value ("_start", status, info, abfd, sec, offset); | |
322 | cached = TRUE; | |
323 | } | |
324 | return cached_value; | |
325 | } | |
326 | ||
327 | static bfd_vma | |
328 | get_ramstart (bfd_reloc_status_type * status, | |
329 | struct bfd_link_info * info, | |
330 | bfd * abfd, | |
331 | asection * sec, | |
332 | int offset) | |
333 | { | |
334 | static bfd_boolean cached = FALSE; | |
335 | static bfd_vma cached_value = 0; | |
336 | ||
337 | if (!cached) | |
338 | { | |
339 | cached_value = get_symbol_value ("__datastart", status, info, abfd, sec, offset); | |
340 | cached = TRUE; | |
341 | } | |
342 | return cached_value; | |
343 | } | |
344 | ||
345 | #define NUM_STACK_ENTRIES 16 | |
346 | static int32_t rl78_stack [ NUM_STACK_ENTRIES ]; | |
347 | static unsigned int rl78_stack_top; | |
348 | ||
349 | #define RL78_STACK_PUSH(val) \ | |
350 | do \ | |
351 | { \ | |
352 | if (rl78_stack_top < NUM_STACK_ENTRIES) \ | |
353 | rl78_stack [rl78_stack_top ++] = (val); \ | |
354 | else \ | |
355 | r = bfd_reloc_dangerous; \ | |
356 | } \ | |
357 | while (0) | |
358 | ||
359 | #define RL78_STACK_POP(dest) \ | |
360 | do \ | |
361 | { \ | |
362 | if (rl78_stack_top > 0) \ | |
363 | (dest) = rl78_stack [-- rl78_stack_top]; \ | |
364 | else \ | |
365 | (dest) = 0, r = bfd_reloc_dangerous; \ | |
366 | } \ | |
367 | while (0) | |
368 | ||
369 | /* Relocate an RL78 ELF section. | |
370 | There is some attempt to make this function usable for many architectures, | |
371 | both USE_REL and USE_RELA ['twould be nice if such a critter existed], | |
372 | if only to serve as a learning tool. | |
373 | ||
374 | The RELOCATE_SECTION function is called by the new ELF backend linker | |
375 | to handle the relocations for a section. | |
376 | ||
377 | The relocs are always passed as Rela structures; if the section | |
378 | actually uses Rel structures, the r_addend field will always be | |
379 | zero. | |
380 | ||
381 | This function is responsible for adjusting the section contents as | |
382 | necessary, and (if using Rela relocs and generating a relocatable | |
383 | output file) adjusting the reloc addend as necessary. | |
384 | ||
385 | This function does not have to worry about setting the reloc | |
386 | address or the reloc symbol index. | |
387 | ||
388 | LOCAL_SYMS is a pointer to the swapped in local symbols. | |
389 | ||
390 | LOCAL_SECTIONS is an array giving the section in the input file | |
391 | corresponding to the st_shndx field of each local symbol. | |
392 | ||
393 | The global hash table entry for the global symbols can be found | |
394 | via elf_sym_hashes (input_bfd). | |
395 | ||
396 | When generating relocatable output, this function must handle | |
397 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is | |
398 | going to be the section symbol corresponding to the output | |
399 | section, which means that the addend must be adjusted | |
400 | accordingly. */ | |
401 | ||
402 | static bfd_boolean | |
403 | rl78_elf_relocate_section | |
404 | (bfd * output_bfd, | |
405 | struct bfd_link_info * info, | |
406 | bfd * input_bfd, | |
407 | asection * input_section, | |
408 | bfd_byte * contents, | |
409 | Elf_Internal_Rela * relocs, | |
410 | Elf_Internal_Sym * local_syms, | |
411 | asection ** local_sections) | |
412 | { | |
413 | Elf_Internal_Shdr * symtab_hdr; | |
414 | struct elf_link_hash_entry ** sym_hashes; | |
415 | Elf_Internal_Rela * rel; | |
416 | Elf_Internal_Rela * relend; | |
417 | bfd *dynobj; | |
418 | asection *splt; | |
419 | ||
420 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; | |
421 | sym_hashes = elf_sym_hashes (input_bfd); | |
422 | relend = relocs + input_section->reloc_count; | |
423 | ||
424 | dynobj = elf_hash_table (info)->dynobj; | |
425 | splt = NULL; | |
426 | if (dynobj != NULL) | |
427 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
428 | ||
429 | for (rel = relocs; rel < relend; rel ++) | |
430 | { | |
431 | reloc_howto_type * howto; | |
432 | unsigned long r_symndx; | |
433 | Elf_Internal_Sym * sym; | |
434 | asection * sec; | |
435 | struct elf_link_hash_entry * h; | |
436 | bfd_vma relocation; | |
437 | bfd_reloc_status_type r; | |
438 | const char * name = NULL; | |
439 | bfd_boolean unresolved_reloc = TRUE; | |
440 | int r_type; | |
441 | ||
442 | r_type = ELF32_R_TYPE (rel->r_info); | |
443 | r_symndx = ELF32_R_SYM (rel->r_info); | |
444 | ||
445 | howto = rl78_elf_howto_table + ELF32_R_TYPE (rel->r_info); | |
446 | h = NULL; | |
447 | sym = NULL; | |
448 | sec = NULL; | |
449 | relocation = 0; | |
450 | ||
451 | if (r_symndx < symtab_hdr->sh_info) | |
452 | { | |
453 | sym = local_syms + r_symndx; | |
454 | sec = local_sections [r_symndx]; | |
455 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, & sec, rel); | |
456 | ||
457 | name = bfd_elf_string_from_elf_section | |
458 | (input_bfd, symtab_hdr->sh_link, sym->st_name); | |
459 | name = (sym->st_name == 0) ? bfd_section_name (input_bfd, sec) : name; | |
460 | } | |
461 | else | |
462 | { | |
463 | bfd_boolean warned; | |
464 | ||
465 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
466 | r_symndx, symtab_hdr, sym_hashes, h, | |
467 | sec, relocation, unresolved_reloc, | |
468 | warned); | |
469 | ||
470 | name = h->root.root.string; | |
471 | } | |
472 | ||
473 | if (sec != NULL && elf_discarded_section (sec)) | |
474 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, | |
475 | rel, relend, howto, contents); | |
476 | ||
477 | if (info->relocatable) | |
478 | { | |
479 | /* This is a relocatable link. We don't have to change | |
480 | anything, unless the reloc is against a section symbol, | |
481 | in which case we have to adjust according to where the | |
482 | section symbol winds up in the output section. */ | |
483 | if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
484 | rel->r_addend += sec->output_offset; | |
485 | continue; | |
486 | } | |
487 | ||
488 | switch (ELF32_R_TYPE (rel->r_info)) | |
489 | { | |
490 | case R_RL78_DIR16S: | |
491 | { | |
492 | bfd_vma *plt_offset; | |
493 | ||
494 | if (h != NULL) | |
495 | plt_offset = &h->plt.offset; | |
496 | else | |
497 | plt_offset = elf_local_got_offsets (input_bfd) + r_symndx; | |
498 | ||
499 | /* printf("%s: rel %x plt %d\n", h ? h->root.root.string : "(none)", | |
500 | relocation, *plt_offset);*/ | |
501 | if (valid_16bit_address (relocation)) | |
502 | { | |
503 | /* If the symbol is in range for a 16-bit address, we should | |
504 | have deallocated the plt entry in relax_section. */ | |
505 | BFD_ASSERT (*plt_offset == (bfd_vma) -1); | |
506 | } | |
507 | else | |
508 | { | |
509 | /* If the symbol is out of range for a 16-bit address, | |
510 | we must have allocated a plt entry. */ | |
511 | BFD_ASSERT (*plt_offset != (bfd_vma) -1); | |
512 | ||
513 | /* If this is the first time we've processed this symbol, | |
514 | fill in the plt entry with the correct symbol address. */ | |
515 | if ((*plt_offset & 1) == 0) | |
516 | { | |
517 | unsigned int x; | |
518 | ||
519 | x = 0x000000ec; /* br !!abs24 */ | |
520 | x |= (relocation << 8) & 0xffffff00; | |
521 | bfd_put_32 (input_bfd, x, splt->contents + *plt_offset); | |
522 | *plt_offset |= 1; | |
523 | } | |
524 | ||
525 | relocation = (splt->output_section->vma | |
526 | + splt->output_offset | |
527 | + (*plt_offset & -2)); | |
528 | if (name) | |
529 | { | |
530 | char *newname = bfd_malloc (strlen(name)+5); | |
531 | strcpy (newname, name); | |
532 | strcat(newname, ".plt"); | |
533 | _bfd_generic_link_add_one_symbol (info, | |
534 | input_bfd, | |
535 | newname, | |
536 | BSF_FUNCTION | BSF_WEAK, | |
537 | splt, | |
538 | (*plt_offset & -2), | |
539 | 0, | |
540 | 1, | |
541 | 0, | |
542 | 0); | |
543 | } | |
544 | } | |
545 | } | |
546 | break; | |
547 | } | |
548 | ||
549 | if (h != NULL && h->root.type == bfd_link_hash_undefweak) | |
550 | /* If the symbol is undefined and weak | |
551 | then the relocation resolves to zero. */ | |
552 | relocation = 0; | |
553 | else | |
554 | { | |
555 | if (howto->pc_relative) | |
556 | { | |
557 | relocation -= (input_section->output_section->vma | |
558 | + input_section->output_offset | |
559 | + rel->r_offset); | |
560 | relocation -= bfd_get_reloc_size (howto); | |
561 | } | |
562 | ||
563 | relocation += rel->r_addend; | |
564 | } | |
565 | ||
566 | r = bfd_reloc_ok; | |
567 | ||
568 | #define RANGE(a,b) if (a > (long) relocation || (long) relocation > b) r = bfd_reloc_overflow | |
569 | #define ALIGN(m) if (relocation & m) r = bfd_reloc_other; | |
570 | #define OP(i) (contents[rel->r_offset + (i)]) | |
571 | ||
572 | /* Opcode relocs are always big endian. Data relocs are bi-endian. */ | |
573 | switch (r_type) | |
574 | { | |
575 | case R_RL78_NONE: | |
576 | break; | |
577 | ||
578 | case R_RL78_DIR8S_PCREL: | |
579 | RANGE (-128, 127); | |
580 | OP (0) = relocation; | |
581 | break; | |
582 | ||
583 | case R_RL78_DIR8S: | |
584 | RANGE (-128, 255); | |
585 | OP (0) = relocation; | |
586 | break; | |
587 | ||
588 | case R_RL78_DIR8U: | |
589 | RANGE (0, 255); | |
590 | OP (0) = relocation; | |
591 | break; | |
592 | ||
593 | case R_RL78_DIR16S_PCREL: | |
594 | RANGE (-32768, 32767); | |
595 | OP (0) = relocation; | |
596 | OP (1) = relocation >> 8; | |
597 | break; | |
598 | ||
599 | case R_RL78_DIR16S: | |
600 | if ((relocation & 0xf0000) == 0xf0000) | |
601 | relocation &= 0xffff; | |
602 | RANGE (-32768, 65535); | |
603 | OP (0) = relocation; | |
604 | OP (1) = relocation >> 8; | |
605 | break; | |
606 | ||
607 | case R_RL78_DIR16U: | |
608 | RANGE (0, 65536); | |
609 | OP (0) = relocation; | |
610 | OP (1) = relocation >> 8; | |
611 | break; | |
612 | ||
613 | case R_RL78_DIR16: | |
614 | RANGE (-32768, 65536); | |
615 | OP (0) = relocation; | |
616 | OP (1) = relocation >> 8; | |
617 | break; | |
618 | ||
619 | case R_RL78_DIR16_REV: | |
620 | RANGE (-32768, 65536); | |
621 | OP (1) = relocation; | |
622 | OP (0) = relocation >> 8; | |
623 | break; | |
624 | ||
625 | case R_RL78_DIR3U_PCREL: | |
626 | RANGE (3, 10); | |
627 | OP (0) &= 0xf8; | |
628 | OP (0) |= relocation & 0x07; | |
629 | break; | |
630 | ||
631 | case R_RL78_DIR24S_PCREL: | |
632 | RANGE (-0x800000, 0x7fffff); | |
633 | OP (0) = relocation; | |
634 | OP (1) = relocation >> 8; | |
635 | OP (2) = relocation >> 16; | |
636 | break; | |
637 | ||
638 | case R_RL78_DIR24S: | |
639 | RANGE (-0x800000, 0x7fffff); | |
640 | OP (0) = relocation; | |
641 | OP (1) = relocation >> 8; | |
642 | OP (2) = relocation >> 16; | |
643 | break; | |
644 | ||
645 | case R_RL78_DIR32: | |
646 | OP (0) = relocation; | |
647 | OP (1) = relocation >> 8; | |
648 | OP (2) = relocation >> 16; | |
649 | OP (3) = relocation >> 24; | |
650 | break; | |
651 | ||
652 | case R_RL78_DIR32_REV: | |
653 | OP (3) = relocation; | |
654 | OP (2) = relocation >> 8; | |
655 | OP (1) = relocation >> 16; | |
656 | OP (0) = relocation >> 24; | |
657 | break; | |
658 | ||
659 | /* Complex reloc handling: */ | |
660 | ||
661 | case R_RL78_ABS32: | |
662 | RL78_STACK_POP (relocation); | |
663 | OP (0) = relocation; | |
664 | OP (1) = relocation >> 8; | |
665 | OP (2) = relocation >> 16; | |
666 | OP (3) = relocation >> 24; | |
667 | break; | |
668 | ||
669 | case R_RL78_ABS32_REV: | |
670 | RL78_STACK_POP (relocation); | |
671 | OP (3) = relocation; | |
672 | OP (2) = relocation >> 8; | |
673 | OP (1) = relocation >> 16; | |
674 | OP (0) = relocation >> 24; | |
675 | break; | |
676 | ||
677 | case R_RL78_ABS24S_PCREL: | |
678 | case R_RL78_ABS24S: | |
679 | RL78_STACK_POP (relocation); | |
680 | RANGE (-0x800000, 0x7fffff); | |
681 | OP (0) = relocation; | |
682 | OP (1) = relocation >> 8; | |
683 | OP (2) = relocation >> 16; | |
684 | break; | |
685 | ||
686 | case R_RL78_ABS16: | |
687 | RL78_STACK_POP (relocation); | |
688 | RANGE (-32768, 65535); | |
689 | OP (0) = relocation; | |
690 | OP (1) = relocation >> 8; | |
691 | break; | |
692 | ||
693 | case R_RL78_ABS16_REV: | |
694 | RL78_STACK_POP (relocation); | |
695 | RANGE (-32768, 65535); | |
696 | OP (1) = relocation; | |
697 | OP (0) = relocation >> 8; | |
698 | break; | |
699 | ||
700 | case R_RL78_ABS16S_PCREL: | |
701 | case R_RL78_ABS16S: | |
702 | RL78_STACK_POP (relocation); | |
703 | RANGE (-32768, 32767); | |
704 | OP (0) = relocation; | |
705 | OP (1) = relocation >> 8; | |
706 | break; | |
707 | ||
708 | case R_RL78_ABS16U: | |
709 | RL78_STACK_POP (relocation); | |
710 | RANGE (0, 65536); | |
711 | OP (0) = relocation; | |
712 | OP (1) = relocation >> 8; | |
713 | break; | |
714 | ||
715 | case R_RL78_ABS16UL: | |
716 | RL78_STACK_POP (relocation); | |
717 | relocation >>= 2; | |
718 | RANGE (0, 65536); | |
719 | OP (0) = relocation; | |
720 | OP (1) = relocation >> 8; | |
721 | break; | |
722 | ||
723 | case R_RL78_ABS16UW: | |
724 | RL78_STACK_POP (relocation); | |
725 | relocation >>= 1; | |
726 | RANGE (0, 65536); | |
727 | OP (0) = relocation; | |
728 | OP (1) = relocation >> 8; | |
729 | break; | |
730 | ||
731 | case R_RL78_ABS8: | |
732 | RL78_STACK_POP (relocation); | |
733 | RANGE (-128, 255); | |
734 | OP (0) = relocation; | |
735 | break; | |
736 | ||
737 | case R_RL78_ABS8U: | |
738 | RL78_STACK_POP (relocation); | |
739 | RANGE (0, 255); | |
740 | OP (0) = relocation; | |
741 | break; | |
742 | ||
743 | case R_RL78_ABS8UL: | |
744 | RL78_STACK_POP (relocation); | |
745 | relocation >>= 2; | |
746 | RANGE (0, 255); | |
747 | OP (0) = relocation; | |
748 | break; | |
749 | ||
750 | case R_RL78_ABS8UW: | |
751 | RL78_STACK_POP (relocation); | |
752 | relocation >>= 1; | |
753 | RANGE (0, 255); | |
754 | OP (0) = relocation; | |
755 | break; | |
756 | ||
757 | case R_RL78_ABS8S_PCREL: | |
758 | case R_RL78_ABS8S: | |
759 | RL78_STACK_POP (relocation); | |
760 | RANGE (-128, 127); | |
761 | OP (0) = relocation; | |
762 | break; | |
763 | ||
764 | case R_RL78_SYM: | |
765 | if (r_symndx < symtab_hdr->sh_info) | |
766 | RL78_STACK_PUSH (sec->output_section->vma | |
767 | + sec->output_offset | |
768 | + sym->st_value | |
769 | + rel->r_addend); | |
770 | else | |
771 | { | |
772 | if (h != NULL | |
773 | && (h->root.type == bfd_link_hash_defined | |
774 | || h->root.type == bfd_link_hash_defweak)) | |
775 | RL78_STACK_PUSH (h->root.u.def.value | |
776 | + sec->output_section->vma | |
777 | + sec->output_offset | |
778 | + rel->r_addend); | |
779 | else | |
780 | _bfd_error_handler (_("Warning: RL78_SYM reloc with an unknown symbol")); | |
781 | } | |
782 | break; | |
783 | ||
784 | case R_RL78_OPneg: | |
785 | { | |
786 | int32_t tmp; | |
787 | ||
788 | RL78_STACK_POP (tmp); | |
789 | tmp = - tmp; | |
790 | RL78_STACK_PUSH (tmp); | |
791 | } | |
792 | break; | |
793 | ||
794 | case R_RL78_OPadd: | |
795 | { | |
796 | int32_t tmp1, tmp2; | |
797 | ||
798 | RL78_STACK_POP (tmp2); | |
799 | RL78_STACK_POP (tmp1); | |
800 | tmp1 += tmp2; | |
801 | RL78_STACK_PUSH (tmp1); | |
802 | } | |
803 | break; | |
804 | ||
805 | case R_RL78_OPsub: | |
806 | { | |
807 | int32_t tmp1, tmp2; | |
808 | ||
809 | RL78_STACK_POP (tmp2); | |
810 | RL78_STACK_POP (tmp1); | |
811 | tmp2 -= tmp1; | |
812 | RL78_STACK_PUSH (tmp2); | |
813 | } | |
814 | break; | |
815 | ||
816 | case R_RL78_OPmul: | |
817 | { | |
818 | int32_t tmp1, tmp2; | |
819 | ||
820 | RL78_STACK_POP (tmp2); | |
821 | RL78_STACK_POP (tmp1); | |
822 | tmp1 *= tmp2; | |
823 | RL78_STACK_PUSH (tmp1); | |
824 | } | |
825 | break; | |
826 | ||
827 | case R_RL78_OPdiv: | |
828 | { | |
829 | int32_t tmp1, tmp2; | |
830 | ||
831 | RL78_STACK_POP (tmp2); | |
832 | RL78_STACK_POP (tmp1); | |
833 | tmp1 /= tmp2; | |
834 | RL78_STACK_PUSH (tmp1); | |
835 | } | |
836 | break; | |
837 | ||
838 | case R_RL78_OPshla: | |
839 | { | |
840 | int32_t tmp1, tmp2; | |
841 | ||
842 | RL78_STACK_POP (tmp2); | |
843 | RL78_STACK_POP (tmp1); | |
844 | tmp1 <<= tmp2; | |
845 | RL78_STACK_PUSH (tmp1); | |
846 | } | |
847 | break; | |
848 | ||
849 | case R_RL78_OPshra: | |
850 | { | |
851 | int32_t tmp1, tmp2; | |
852 | ||
853 | RL78_STACK_POP (tmp2); | |
854 | RL78_STACK_POP (tmp1); | |
855 | tmp1 >>= tmp2; | |
856 | RL78_STACK_PUSH (tmp1); | |
857 | } | |
858 | break; | |
859 | ||
860 | case R_RL78_OPsctsize: | |
861 | RL78_STACK_PUSH (input_section->size); | |
862 | break; | |
863 | ||
864 | case R_RL78_OPscttop: | |
865 | RL78_STACK_PUSH (input_section->output_section->vma); | |
866 | break; | |
867 | ||
868 | case R_RL78_OPand: | |
869 | { | |
870 | int32_t tmp1, tmp2; | |
871 | ||
872 | RL78_STACK_POP (tmp2); | |
873 | RL78_STACK_POP (tmp1); | |
874 | tmp1 &= tmp2; | |
875 | RL78_STACK_PUSH (tmp1); | |
876 | } | |
877 | break; | |
878 | ||
879 | case R_RL78_OPor: | |
880 | { | |
881 | int32_t tmp1, tmp2; | |
882 | ||
883 | RL78_STACK_POP (tmp2); | |
884 | RL78_STACK_POP (tmp1); | |
885 | tmp1 |= tmp2; | |
886 | RL78_STACK_PUSH (tmp1); | |
887 | } | |
888 | break; | |
889 | ||
890 | case R_RL78_OPxor: | |
891 | { | |
892 | int32_t tmp1, tmp2; | |
893 | ||
894 | RL78_STACK_POP (tmp2); | |
895 | RL78_STACK_POP (tmp1); | |
896 | tmp1 ^= tmp2; | |
897 | RL78_STACK_PUSH (tmp1); | |
898 | } | |
899 | break; | |
900 | ||
901 | case R_RL78_OPnot: | |
902 | { | |
903 | int32_t tmp; | |
904 | ||
905 | RL78_STACK_POP (tmp); | |
906 | tmp = ~ tmp; | |
907 | RL78_STACK_PUSH (tmp); | |
908 | } | |
909 | break; | |
910 | ||
911 | case R_RL78_OPmod: | |
912 | { | |
913 | int32_t tmp1, tmp2; | |
914 | ||
915 | RL78_STACK_POP (tmp2); | |
916 | RL78_STACK_POP (tmp1); | |
917 | tmp1 %= tmp2; | |
918 | RL78_STACK_PUSH (tmp1); | |
919 | } | |
920 | break; | |
921 | ||
922 | case R_RL78_OPromtop: | |
923 | RL78_STACK_PUSH (get_romstart (&r, info, input_bfd, input_section, rel->r_offset)); | |
924 | break; | |
925 | ||
926 | case R_RL78_OPramtop: | |
927 | RL78_STACK_PUSH (get_ramstart (&r, info, input_bfd, input_section, rel->r_offset)); | |
928 | break; | |
929 | ||
930 | default: | |
931 | r = bfd_reloc_notsupported; | |
932 | break; | |
933 | } | |
934 | ||
935 | if (r != bfd_reloc_ok) | |
936 | { | |
937 | const char * msg = NULL; | |
938 | ||
939 | switch (r) | |
940 | { | |
941 | case bfd_reloc_overflow: | |
942 | /* Catch the case of a missing function declaration | |
943 | and emit a more helpful error message. */ | |
944 | if (r_type == R_RL78_DIR24S_PCREL) | |
945 | msg = _("%B(%A): error: call to undefined function '%s'"); | |
946 | else | |
947 | r = info->callbacks->reloc_overflow | |
948 | (info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0, | |
949 | input_bfd, input_section, rel->r_offset); | |
950 | break; | |
951 | ||
952 | case bfd_reloc_undefined: | |
953 | r = info->callbacks->undefined_symbol | |
954 | (info, name, input_bfd, input_section, rel->r_offset, | |
955 | TRUE); | |
956 | break; | |
957 | ||
958 | case bfd_reloc_other: | |
959 | msg = _("%B(%A): warning: unaligned access to symbol '%s' in the small data area"); | |
960 | break; | |
961 | ||
962 | case bfd_reloc_outofrange: | |
963 | msg = _("%B(%A): internal error: out of range error"); | |
964 | break; | |
965 | ||
966 | case bfd_reloc_notsupported: | |
967 | msg = _("%B(%A): internal error: unsupported relocation error"); | |
968 | break; | |
969 | ||
970 | case bfd_reloc_dangerous: | |
971 | msg = _("%B(%A): internal error: dangerous relocation"); | |
972 | break; | |
973 | ||
974 | default: | |
975 | msg = _("%B(%A): internal error: unknown error"); | |
976 | break; | |
977 | } | |
978 | ||
979 | if (msg) | |
980 | _bfd_error_handler (msg, input_bfd, input_section, name); | |
981 | ||
982 | if (! r) | |
983 | return FALSE; | |
984 | } | |
985 | } | |
986 | ||
987 | return TRUE; | |
988 | } | |
989 | \f | |
990 | /* Function to set the ELF flag bits. */ | |
991 | ||
992 | static bfd_boolean | |
993 | rl78_elf_set_private_flags (bfd * abfd, flagword flags) | |
994 | { | |
995 | elf_elfheader (abfd)->e_flags = flags; | |
996 | elf_flags_init (abfd) = TRUE; | |
997 | return TRUE; | |
998 | } | |
999 | ||
1000 | static bfd_boolean no_warn_mismatch = FALSE; | |
1001 | ||
1002 | void bfd_elf32_rl78_set_target_flags (bfd_boolean); | |
1003 | ||
1004 | void | |
1005 | bfd_elf32_rl78_set_target_flags (bfd_boolean user_no_warn_mismatch) | |
1006 | { | |
1007 | no_warn_mismatch = user_no_warn_mismatch; | |
1008 | } | |
1009 | ||
1010 | /* Merge backend specific data from an object file to the output | |
1011 | object file when linking. */ | |
1012 | ||
1013 | static bfd_boolean | |
1014 | rl78_elf_merge_private_bfd_data (bfd * ibfd, bfd * obfd) | |
1015 | { | |
99c513f6 DD |
1016 | flagword new_flags; |
1017 | bfd_boolean error = FALSE; | |
1018 | ||
1019 | new_flags = elf_elfheader (ibfd)->e_flags; | |
99c513f6 DD |
1020 | |
1021 | if (!elf_flags_init (obfd)) | |
1022 | { | |
1023 | /* First call, no flags set. */ | |
1024 | elf_flags_init (obfd) = TRUE; | |
1025 | elf_elfheader (obfd)->e_flags = new_flags; | |
1026 | } | |
1027 | ||
1028 | return !error; | |
1029 | } | |
1030 | \f | |
1031 | static bfd_boolean | |
1032 | rl78_elf_print_private_bfd_data (bfd * abfd, void * ptr) | |
1033 | { | |
1034 | FILE * file = (FILE *) ptr; | |
1035 | flagword flags; | |
1036 | ||
1037 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
1038 | ||
1039 | /* Print normal ELF private data. */ | |
1040 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
1041 | ||
1042 | flags = elf_elfheader (abfd)->e_flags; | |
1043 | fprintf (file, _("private flags = 0x%lx:"), (long) flags); | |
1044 | ||
1045 | fputc ('\n', file); | |
1046 | return TRUE; | |
1047 | } | |
1048 | ||
1049 | /* Return the MACH for an e_flags value. */ | |
1050 | ||
1051 | static int | |
1052 | elf32_rl78_machine (bfd * abfd) | |
1053 | { | |
1054 | if ((elf_elfheader (abfd)->e_flags & EF_RL78_CPU_MASK) == EF_RL78_CPU_RL78) | |
1055 | return bfd_mach_rl78; | |
1056 | ||
1057 | return 0; | |
1058 | } | |
1059 | ||
1060 | static bfd_boolean | |
1061 | rl78_elf_object_p (bfd * abfd) | |
1062 | { | |
1063 | bfd_default_set_arch_mach (abfd, bfd_arch_rl78, | |
1064 | elf32_rl78_machine (abfd)); | |
1065 | return TRUE; | |
1066 | } | |
1067 | \f | |
1068 | #ifdef DEBUG | |
1069 | void | |
1070 | rl78_dump_symtab (bfd * abfd, void * internal_syms, void * external_syms) | |
1071 | { | |
1072 | size_t locsymcount; | |
1073 | Elf_Internal_Sym * isymbuf; | |
1074 | Elf_Internal_Sym * isymend; | |
1075 | Elf_Internal_Sym * isym; | |
1076 | Elf_Internal_Shdr * symtab_hdr; | |
1077 | bfd_boolean free_internal = FALSE, free_external = FALSE; | |
1078 | char * st_info_str; | |
1079 | char * st_info_stb_str; | |
1080 | char * st_other_str; | |
1081 | char * st_shndx_str; | |
1082 | ||
1083 | if (! internal_syms) | |
1084 | { | |
1085 | internal_syms = bfd_malloc (1000); | |
1086 | free_internal = 1; | |
1087 | } | |
1088 | if (! external_syms) | |
1089 | { | |
1090 | external_syms = bfd_malloc (1000); | |
1091 | free_external = 1; | |
1092 | } | |
1093 | ||
1094 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1095 | locsymcount = symtab_hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym; | |
1096 | if (free_internal) | |
1097 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
1098 | symtab_hdr->sh_info, 0, | |
1099 | internal_syms, external_syms, NULL); | |
1100 | else | |
1101 | isymbuf = internal_syms; | |
1102 | isymend = isymbuf + locsymcount; | |
1103 | ||
1104 | for (isym = isymbuf ; isym < isymend ; isym++) | |
1105 | { | |
1106 | switch (ELF_ST_TYPE (isym->st_info)) | |
1107 | { | |
1108 | case STT_FUNC: st_info_str = "STT_FUNC"; | |
1109 | case STT_SECTION: st_info_str = "STT_SECTION"; | |
1110 | case STT_FILE: st_info_str = "STT_FILE"; | |
1111 | case STT_OBJECT: st_info_str = "STT_OBJECT"; | |
1112 | case STT_TLS: st_info_str = "STT_TLS"; | |
1113 | default: st_info_str = ""; | |
1114 | } | |
1115 | switch (ELF_ST_BIND (isym->st_info)) | |
1116 | { | |
1117 | case STB_LOCAL: st_info_stb_str = "STB_LOCAL"; | |
1118 | case STB_GLOBAL: st_info_stb_str = "STB_GLOBAL"; | |
1119 | default: st_info_stb_str = ""; | |
1120 | } | |
1121 | switch (ELF_ST_VISIBILITY (isym->st_other)) | |
1122 | { | |
1123 | case STV_DEFAULT: st_other_str = "STV_DEFAULT"; | |
1124 | case STV_INTERNAL: st_other_str = "STV_INTERNAL"; | |
1125 | case STV_PROTECTED: st_other_str = "STV_PROTECTED"; | |
1126 | default: st_other_str = ""; | |
1127 | } | |
1128 | switch (isym->st_shndx) | |
1129 | { | |
1130 | case SHN_ABS: st_shndx_str = "SHN_ABS"; | |
1131 | case SHN_COMMON: st_shndx_str = "SHN_COMMON"; | |
1132 | case SHN_UNDEF: st_shndx_str = "SHN_UNDEF"; | |
1133 | default: st_shndx_str = ""; | |
1134 | } | |
1135 | ||
1136 | printf ("isym = %p st_value = %lx st_size = %lx st_name = (%lu) %s " | |
1137 | "st_info = (%d) %s %s st_other = (%d) %s st_shndx = (%d) %s\n", | |
1138 | isym, | |
1139 | (unsigned long) isym->st_value, | |
1140 | (unsigned long) isym->st_size, | |
1141 | isym->st_name, | |
1142 | bfd_elf_string_from_elf_section (abfd, symtab_hdr->sh_link, | |
1143 | isym->st_name), | |
1144 | isym->st_info, st_info_str, st_info_stb_str, | |
1145 | isym->st_other, st_other_str, | |
1146 | isym->st_shndx, st_shndx_str); | |
1147 | } | |
1148 | if (free_internal) | |
1149 | free (internal_syms); | |
1150 | if (free_external) | |
1151 | free (external_syms); | |
1152 | } | |
1153 | ||
1154 | char * | |
1155 | rl78_get_reloc (long reloc) | |
1156 | { | |
1157 | if (0 <= reloc && reloc < R_RL78_max) | |
1158 | return rl78_elf_howto_table[reloc].name; | |
1159 | return ""; | |
1160 | } | |
1161 | #endif /* DEBUG */ | |
1162 | ||
1163 | \f | |
1164 | /* support PLT for 16-bit references to 24-bit functions. */ | |
1165 | ||
1166 | /* We support 16-bit pointers to code above 64k by generating a thunk | |
1167 | below 64k containing a JMP instruction to the final address. */ | |
1168 | ||
1169 | static bfd_boolean | |
1170 | rl78_elf_check_relocs | |
1171 | (bfd * abfd, | |
1172 | struct bfd_link_info * info, | |
1173 | asection * sec, | |
1174 | const Elf_Internal_Rela * relocs) | |
1175 | { | |
1176 | Elf_Internal_Shdr * symtab_hdr; | |
1177 | struct elf_link_hash_entry ** sym_hashes; | |
1178 | const Elf_Internal_Rela * rel; | |
1179 | const Elf_Internal_Rela * rel_end; | |
1180 | bfd_vma *local_plt_offsets; | |
1181 | asection *splt; | |
1182 | bfd *dynobj; | |
1183 | ||
1184 | if (info->relocatable) | |
1185 | return TRUE; | |
1186 | ||
1187 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1188 | sym_hashes = elf_sym_hashes (abfd); | |
1189 | local_plt_offsets = elf_local_got_offsets (abfd); | |
1190 | splt = NULL; | |
1191 | dynobj = elf_hash_table(info)->dynobj; | |
1192 | ||
1193 | rel_end = relocs + sec->reloc_count; | |
1194 | for (rel = relocs; rel < rel_end; rel++) | |
1195 | { | |
1196 | struct elf_link_hash_entry *h; | |
1197 | unsigned long r_symndx; | |
1198 | bfd_vma *offset; | |
1199 | ||
1200 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1201 | if (r_symndx < symtab_hdr->sh_info) | |
1202 | h = NULL; | |
1203 | else | |
1204 | { | |
1205 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1206 | while (h->root.type == bfd_link_hash_indirect | |
1207 | || h->root.type == bfd_link_hash_warning) | |
1208 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1209 | } | |
1210 | ||
1211 | switch (ELF32_R_TYPE (rel->r_info)) | |
1212 | { | |
1213 | /* This relocation describes a 16-bit pointer to a function. | |
1214 | We may need to allocate a thunk in low memory; reserve memory | |
1215 | for it now. */ | |
1216 | case R_RL78_DIR16S: | |
1217 | if (dynobj == NULL) | |
1218 | elf_hash_table (info)->dynobj = dynobj = abfd; | |
1219 | if (splt == NULL) | |
1220 | { | |
1221 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1222 | if (splt == NULL) | |
1223 | { | |
1224 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | |
1225 | | SEC_IN_MEMORY | SEC_LINKER_CREATED | |
1226 | | SEC_READONLY | SEC_CODE); | |
1227 | splt = bfd_make_section_with_flags (dynobj, ".plt", flags); | |
1228 | if (splt == NULL | |
1229 | || ! bfd_set_section_alignment (dynobj, splt, 1)) | |
1230 | return FALSE; | |
1231 | } | |
1232 | } | |
1233 | ||
1234 | if (h != NULL) | |
1235 | offset = &h->plt.offset; | |
1236 | else | |
1237 | { | |
1238 | if (local_plt_offsets == NULL) | |
1239 | { | |
1240 | size_t size; | |
1241 | unsigned int i; | |
1242 | ||
1243 | size = symtab_hdr->sh_info * sizeof (bfd_vma); | |
1244 | local_plt_offsets = (bfd_vma *) bfd_alloc (abfd, size); | |
1245 | if (local_plt_offsets == NULL) | |
1246 | return FALSE; | |
1247 | elf_local_got_offsets (abfd) = local_plt_offsets; | |
1248 | ||
1249 | for (i = 0; i < symtab_hdr->sh_info; i++) | |
1250 | local_plt_offsets[i] = (bfd_vma) -1; | |
1251 | } | |
1252 | offset = &local_plt_offsets[r_symndx]; | |
1253 | } | |
1254 | ||
1255 | if (*offset == (bfd_vma) -1) | |
1256 | { | |
1257 | *offset = splt->size; | |
1258 | splt->size += 4; | |
1259 | } | |
1260 | break; | |
1261 | } | |
1262 | } | |
1263 | ||
1264 | return TRUE; | |
1265 | } | |
1266 | ||
1267 | /* This must exist if dynobj is ever set. */ | |
1268 | ||
1269 | static bfd_boolean | |
1270 | rl78_elf_finish_dynamic_sections (bfd *abfd ATTRIBUTE_UNUSED, | |
1271 | struct bfd_link_info *info) | |
1272 | { | |
1273 | bfd *dynobj; | |
1274 | asection *splt; | |
1275 | ||
1276 | /* As an extra sanity check, verify that all plt entries have | |
1277 | been filled in. */ | |
1278 | ||
1279 | if ((dynobj = elf_hash_table (info)->dynobj) != NULL | |
1280 | && (splt = bfd_get_section_by_name (dynobj, ".plt")) != NULL) | |
1281 | { | |
1282 | bfd_byte *contents = splt->contents; | |
1283 | unsigned int i, size = splt->size; | |
1284 | for (i = 0; i < size; i += 4) | |
1285 | { | |
1286 | unsigned int x = bfd_get_32 (dynobj, contents + i); | |
1287 | BFD_ASSERT (x != 0); | |
1288 | } | |
1289 | } | |
1290 | ||
1291 | return TRUE; | |
1292 | } | |
1293 | ||
1294 | static bfd_boolean | |
1295 | rl78_elf_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED, | |
1296 | struct bfd_link_info *info) | |
1297 | { | |
1298 | bfd *dynobj; | |
1299 | asection *splt; | |
1300 | ||
1301 | if (info->relocatable) | |
1302 | return TRUE; | |
1303 | ||
1304 | dynobj = elf_hash_table (info)->dynobj; | |
1305 | if (dynobj == NULL) | |
1306 | return TRUE; | |
1307 | ||
1308 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1309 | BFD_ASSERT (splt != NULL); | |
1310 | ||
1311 | splt->contents = (bfd_byte *) bfd_zalloc (dynobj, splt->size); | |
1312 | if (splt->contents == NULL) | |
1313 | return FALSE; | |
1314 | ||
1315 | return TRUE; | |
1316 | } | |
1317 | ||
1318 | \f | |
1319 | ||
1320 | /* Handle relaxing. */ | |
1321 | ||
1322 | /* A subroutine of rl78_elf_relax_section. If the global symbol H | |
1323 | is within the low 64k, remove any entry for it in the plt. */ | |
1324 | ||
1325 | struct relax_plt_data | |
1326 | { | |
1327 | asection *splt; | |
1328 | bfd_boolean *again; | |
1329 | }; | |
1330 | ||
1331 | static bfd_boolean | |
1332 | rl78_relax_plt_check (struct elf_link_hash_entry *h, | |
1333 | PTR xdata) | |
1334 | { | |
1335 | struct relax_plt_data *data = (struct relax_plt_data *) xdata; | |
1336 | ||
1337 | if (h->plt.offset != (bfd_vma) -1) | |
1338 | { | |
1339 | bfd_vma address; | |
1340 | ||
1341 | if (h->root.type == bfd_link_hash_undefined | |
1342 | || h->root.type == bfd_link_hash_undefweak) | |
1343 | address = 0; | |
1344 | else | |
1345 | address = (h->root.u.def.section->output_section->vma | |
1346 | + h->root.u.def.section->output_offset | |
1347 | + h->root.u.def.value); | |
1348 | ||
1349 | if (valid_16bit_address (address)) | |
1350 | { | |
1351 | h->plt.offset = -1; | |
1352 | data->splt->size -= 4; | |
1353 | *data->again = TRUE; | |
1354 | } | |
1355 | } | |
1356 | ||
1357 | return TRUE; | |
1358 | } | |
1359 | ||
1360 | /* A subroutine of rl78_elf_relax_section. If the global symbol H | |
1361 | previously had a plt entry, give it a new entry offset. */ | |
1362 | ||
1363 | static bfd_boolean | |
1364 | rl78_relax_plt_realloc (struct elf_link_hash_entry *h, | |
1365 | PTR xdata) | |
1366 | { | |
1367 | bfd_vma *entry = (bfd_vma *) xdata; | |
1368 | ||
1369 | if (h->plt.offset != (bfd_vma) -1) | |
1370 | { | |
1371 | h->plt.offset = *entry; | |
1372 | *entry += 4; | |
1373 | } | |
1374 | ||
1375 | return TRUE; | |
1376 | } | |
1377 | ||
1378 | static bfd_boolean | |
1379 | rl78_elf_relax_plt_section (bfd *dynobj, | |
1380 | asection *splt, | |
1381 | struct bfd_link_info *info, | |
1382 | bfd_boolean *again) | |
1383 | { | |
1384 | struct relax_plt_data relax_plt_data; | |
1385 | bfd *ibfd; | |
1386 | ||
1387 | /* Assume nothing changes. */ | |
1388 | *again = FALSE; | |
1389 | ||
1390 | if (info->relocatable) | |
1391 | return TRUE; | |
1392 | ||
1393 | /* We only relax the .plt section at the moment. */ | |
1394 | if (dynobj != elf_hash_table (info)->dynobj | |
1395 | || strcmp (splt->name, ".plt") != 0) | |
1396 | return TRUE; | |
1397 | ||
1398 | /* Quick check for an empty plt. */ | |
1399 | if (splt->size == 0) | |
1400 | return TRUE; | |
1401 | ||
1402 | /* Map across all global symbols; see which ones happen to | |
1403 | fall in the low 64k. */ | |
1404 | relax_plt_data.splt = splt; | |
1405 | relax_plt_data.again = again; | |
1406 | elf_link_hash_traverse (elf_hash_table (info), rl78_relax_plt_check, | |
1407 | &relax_plt_data); | |
1408 | ||
1409 | /* Likewise for local symbols, though that's somewhat less convenient | |
1410 | as we have to walk the list of input bfds and swap in symbol data. */ | |
1411 | for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next) | |
1412 | { | |
1413 | bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd); | |
1414 | Elf_Internal_Shdr *symtab_hdr; | |
1415 | Elf_Internal_Sym *isymbuf = NULL; | |
1416 | unsigned int idx; | |
1417 | ||
1418 | if (! local_plt_offsets) | |
1419 | continue; | |
1420 | ||
1421 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
1422 | if (symtab_hdr->sh_info != 0) | |
1423 | { | |
1424 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
1425 | if (isymbuf == NULL) | |
1426 | isymbuf = bfd_elf_get_elf_syms (ibfd, symtab_hdr, | |
1427 | symtab_hdr->sh_info, 0, | |
1428 | NULL, NULL, NULL); | |
1429 | if (isymbuf == NULL) | |
1430 | return FALSE; | |
1431 | } | |
1432 | ||
1433 | for (idx = 0; idx < symtab_hdr->sh_info; ++idx) | |
1434 | { | |
1435 | Elf_Internal_Sym *isym; | |
1436 | asection *tsec; | |
1437 | bfd_vma address; | |
1438 | ||
1439 | if (local_plt_offsets[idx] == (bfd_vma) -1) | |
1440 | continue; | |
1441 | ||
1442 | isym = &isymbuf[idx]; | |
1443 | if (isym->st_shndx == SHN_UNDEF) | |
1444 | continue; | |
1445 | else if (isym->st_shndx == SHN_ABS) | |
1446 | tsec = bfd_abs_section_ptr; | |
1447 | else if (isym->st_shndx == SHN_COMMON) | |
1448 | tsec = bfd_com_section_ptr; | |
1449 | else | |
1450 | tsec = bfd_section_from_elf_index (ibfd, isym->st_shndx); | |
1451 | ||
1452 | address = (tsec->output_section->vma | |
1453 | + tsec->output_offset | |
1454 | + isym->st_value); | |
1455 | if (valid_16bit_address (address)) | |
1456 | { | |
1457 | local_plt_offsets[idx] = -1; | |
1458 | splt->size -= 4; | |
1459 | *again = TRUE; | |
1460 | } | |
1461 | } | |
1462 | ||
1463 | if (isymbuf != NULL | |
1464 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
1465 | { | |
1466 | if (! info->keep_memory) | |
1467 | free (isymbuf); | |
1468 | else | |
1469 | { | |
1470 | /* Cache the symbols for elf_link_input_bfd. */ | |
1471 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
1472 | } | |
1473 | } | |
1474 | } | |
1475 | ||
1476 | /* If we changed anything, walk the symbols again to reallocate | |
1477 | .plt entry addresses. */ | |
1478 | if (*again && splt->size > 0) | |
1479 | { | |
1480 | bfd_vma entry = 0; | |
1481 | ||
1482 | elf_link_hash_traverse (elf_hash_table (info), | |
1483 | rl78_relax_plt_realloc, &entry); | |
1484 | ||
1485 | for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next) | |
1486 | { | |
1487 | bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd); | |
1488 | unsigned int nlocals = elf_tdata (ibfd)->symtab_hdr.sh_info; | |
1489 | unsigned int idx; | |
1490 | ||
1491 | if (! local_plt_offsets) | |
1492 | continue; | |
1493 | ||
1494 | for (idx = 0; idx < nlocals; ++idx) | |
1495 | if (local_plt_offsets[idx] != (bfd_vma) -1) | |
1496 | { | |
1497 | local_plt_offsets[idx] = entry; | |
1498 | entry += 4; | |
1499 | } | |
1500 | } | |
1501 | } | |
1502 | ||
1503 | return TRUE; | |
1504 | } | |
1505 | ||
1506 | static bfd_boolean | |
1507 | rl78_elf_relax_section | |
1508 | (bfd * abfd, | |
1509 | asection * sec, | |
1510 | struct bfd_link_info * link_info, | |
1511 | bfd_boolean * again) | |
1512 | { | |
1513 | if (abfd == elf_hash_table (link_info)->dynobj | |
1514 | && strcmp (sec->name, ".plt") == 0) | |
1515 | return rl78_elf_relax_plt_section (abfd, sec, link_info, again); | |
1516 | ||
1517 | /* Assume nothing changes. */ | |
1518 | *again = FALSE; | |
1519 | return TRUE; | |
1520 | } | |
1521 | ||
1522 | \f | |
1523 | ||
1524 | #define ELF_ARCH bfd_arch_rl78 | |
1525 | #define ELF_MACHINE_CODE EM_RL78 | |
1526 | #define ELF_MAXPAGESIZE 0x1000 | |
1527 | ||
1528 | #define TARGET_LITTLE_SYM bfd_elf32_rl78_vec | |
1529 | #define TARGET_LITTLE_NAME "elf32-rl78" | |
1530 | ||
1531 | #define elf_info_to_howto_rel NULL | |
1532 | #define elf_info_to_howto rl78_info_to_howto_rela | |
1533 | #define elf_backend_object_p rl78_elf_object_p | |
1534 | #define elf_backend_relocate_section rl78_elf_relocate_section | |
1535 | #define elf_symbol_leading_char ('_') | |
1536 | #define elf_backend_can_gc_sections 1 | |
1537 | ||
1538 | #define bfd_elf32_bfd_reloc_type_lookup rl78_reloc_type_lookup | |
1539 | #define bfd_elf32_bfd_reloc_name_lookup rl78_reloc_name_lookup | |
1540 | #define bfd_elf32_bfd_set_private_flags rl78_elf_set_private_flags | |
1541 | #define bfd_elf32_bfd_merge_private_bfd_data rl78_elf_merge_private_bfd_data | |
1542 | #define bfd_elf32_bfd_print_private_bfd_data rl78_elf_print_private_bfd_data | |
1543 | ||
1544 | #define bfd_elf32_bfd_relax_section rl78_elf_relax_section | |
1545 | #define elf_backend_check_relocs rl78_elf_check_relocs | |
1546 | #define elf_backend_always_size_sections \ | |
1547 | rl78_elf_always_size_sections | |
1548 | #define elf_backend_finish_dynamic_sections \ | |
1549 | rl78_elf_finish_dynamic_sections | |
1550 | ||
1551 | #include "elf32-target.h" |