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3f8107ab | 1 | /* ft32-specific support for 32-bit ELF. |
2571583a | 2 | Copyright (C) 2013-2017 Free Software Foundation, Inc. |
3f8107ab AM |
3 | |
4 | Copied from elf32-moxie.c which is.. | |
2571583a | 5 | Copyright (C) 2009-2017 Free Software Foundation, Inc. |
3f8107ab AM |
6 | Free Software Foundation, Inc. |
7 | ||
8 | This file is part of BFD, the Binary File Descriptor library. | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 3 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program; if not, write to the Free Software | |
22 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
23 | MA 02110-1301, USA. */ | |
24 | ||
25 | #include "sysdep.h" | |
26 | #include "bfd.h" | |
27 | #include "libbfd.h" | |
28 | #include "elf-bfd.h" | |
29 | #include "elf/ft32.h" | |
30 | ||
31 | /* Forward declarations. */ | |
32 | ||
33 | static reloc_howto_type ft32_elf_howto_table [] = | |
34 | { | |
35 | /* This reloc does nothing. */ | |
36 | HOWTO (R_FT32_NONE, /* type */ | |
37 | 0, /* rightshift */ | |
38 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
39 | 32, /* bitsize */ | |
40 | FALSE, /* pc_relative */ | |
41 | 0, /* bitpos */ | |
42 | complain_overflow_bitfield, /* complain_on_overflow */ | |
43 | bfd_elf_generic_reloc, /* special_function */ | |
44 | "R_FT32_NONE", /* name */ | |
45 | FALSE, /* partial_inplace */ | |
46 | 0, /* src_mask */ | |
47 | 0, /* dst_mask */ | |
48 | FALSE), /* pcrel_offset */ | |
49 | ||
50 | /* A 32 bit absolute relocation. */ | |
51 | ||
52 | HOWTO (R_FT32_32, /* type */ | |
53 | 0, /* rightshift */ | |
54 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
55 | 32, /* bitsize */ | |
56 | FALSE, /* pc_relative */ | |
57 | 0, /* bitpos */ | |
58 | complain_overflow_bitfield, /* complain_on_overflow */ | |
59 | bfd_elf_generic_reloc, /* special_function */ | |
60 | "R_FT32_32", /* name */ | |
61 | FALSE, /* partial_inplace */ | |
62 | 0x00000000, /* src_mask */ | |
63 | 0xffffffff, /* dst_mask */ | |
64 | FALSE), /* pcrel_offset */ | |
65 | ||
66 | HOWTO (R_FT32_16, /* type */ | |
67 | 0, /* rightshift */ | |
68 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
69 | 16, /* bitsize */ | |
70 | FALSE, /* pc_relative */ | |
71 | 0, /* bitpos */ | |
72 | complain_overflow_bitfield, /* complain_on_overflow */ | |
73 | bfd_elf_generic_reloc, /* special_function */ | |
74 | "R_FT32_16", /* name */ | |
75 | FALSE, /* partial_inplace */ | |
76 | 0x00000000, /* src_mask */ | |
77 | 0x0000ffff, /* dst_mask */ | |
78 | FALSE), /* pcrel_offset */ | |
79 | ||
80 | HOWTO (R_FT32_8, /* type */ | |
81 | 0, /* rightshift */ | |
82 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
83 | 8, /* bitsize */ | |
84 | FALSE, /* pc_relative */ | |
85 | 0, /* bitpos */ | |
86 | complain_overflow_signed, /* complain_on_overflow */ | |
87 | bfd_elf_generic_reloc, /* special_function */ | |
88 | "R_FT32_8", /* name */ | |
89 | FALSE, /* partial_inplace */ | |
90 | 0x00000000, /* src_mask */ | |
91 | 0x000000ff, /* dst_mask */ | |
92 | FALSE), /* pcrel_offset */ | |
93 | ||
94 | HOWTO (R_FT32_10, /* type */ | |
95 | 0, /* rightshift */ | |
96 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
97 | 10, /* bitsize */ | |
98 | FALSE, /* pc_relative */ | |
99 | 4, /* bitpos */ | |
100 | complain_overflow_signed, /* complain_on_overflow */ | |
101 | bfd_elf_generic_reloc, /* special_function */ | |
102 | "R_FT32_10", /* name */ | |
103 | FALSE, /* partial_inplace */ | |
104 | 0x00000000, /* src_mask */ | |
105 | 0x00003ff0, /* dst_mask */ | |
106 | FALSE), /* pcrel_offset */ | |
107 | ||
108 | HOWTO (R_FT32_20, /* type */ | |
109 | 0, /* rightshift */ | |
110 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
111 | 20, /* bitsize */ | |
112 | FALSE, /* pc_relative */ | |
113 | 0, /* bitpos */ | |
114 | complain_overflow_dont, /* complain_on_overflow */ | |
115 | bfd_elf_generic_reloc, /* special_function */ | |
116 | "R_FT32_20", /* name */ | |
117 | FALSE, /* partial_inplace */ | |
118 | 0x00000000, /* src_mask */ | |
119 | 0x000fffff, /* dst_mask */ | |
120 | FALSE), /* pcrel_offset */ | |
121 | ||
122 | HOWTO (R_FT32_17, /* type */ | |
123 | 0, /* rightshift */ | |
124 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
125 | 17, /* bitsize */ | |
126 | FALSE, /* pc_relative */ | |
127 | 0, /* bitpos */ | |
128 | complain_overflow_dont, /* complain_on_overflow */ | |
129 | bfd_elf_generic_reloc, /* special_function */ | |
130 | "R_FT32_17", /* name */ | |
131 | FALSE, /* partial_inplace */ | |
132 | 0x00000000, /* src_mask */ | |
133 | 0x0001ffff, /* dst_mask */ | |
134 | FALSE), /* pcrel_offset */ | |
135 | ||
136 | HOWTO (R_FT32_18, /* type */ | |
137 | 2, /* rightshift */ | |
138 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
139 | 18, /* bitsize */ | |
140 | FALSE, /* pc_relative */ | |
141 | 0, /* bitpos */ | |
ef32532f | 142 | complain_overflow_dont, /* complain_on_overflow */ |
3f8107ab AM |
143 | bfd_elf_generic_reloc, /* special_function */ |
144 | "R_FT32_18", /* name */ | |
145 | FALSE, /* partial_inplace */ | |
146 | 0x00000000, /* src_mask */ | |
147 | 0x0003ffff, /* dst_mask */ | |
148 | FALSE), /* pcrel_offset */ | |
149 | ||
3b4b0a62 JB |
150 | HOWTO (R_FT32_15, /* type */ |
151 | 0, /* rightshift */ | |
152 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
153 | 15, /* bitsize */ | |
154 | FALSE, /* pc_relative */ | |
155 | 0, /* bitpos */ | |
156 | complain_overflow_dont, /* complain_on_overflow */ | |
157 | bfd_elf_generic_reloc, /* special_function */ | |
158 | "R_FT32_15", /* name */ | |
159 | FALSE, /* partial_inplace */ | |
160 | 0x00000000, /* src_mask */ | |
161 | 0x00007fff, /* dst_mask */ | |
162 | FALSE), /* pcrel_offset */ | |
3f8107ab AM |
163 | }; |
164 | \f | |
165 | /* Map BFD reloc types to FT32 ELF reloc types. */ | |
166 | ||
167 | struct ft32_reloc_map | |
168 | { | |
169 | bfd_reloc_code_real_type bfd_reloc_val; | |
170 | unsigned int ft32_reloc_val; | |
171 | }; | |
172 | ||
173 | static const struct ft32_reloc_map ft32_reloc_map [] = | |
174 | { | |
175 | { BFD_RELOC_NONE, R_FT32_NONE }, | |
458653a9 | 176 | { BFD_RELOC_32, R_FT32_32 }, |
3f8107ab AM |
177 | { BFD_RELOC_16, R_FT32_16 }, |
178 | { BFD_RELOC_8, R_FT32_8 }, | |
179 | { BFD_RELOC_FT32_10, R_FT32_10 }, | |
180 | { BFD_RELOC_FT32_20, R_FT32_20 }, | |
181 | { BFD_RELOC_FT32_17, R_FT32_17 }, | |
182 | { BFD_RELOC_FT32_18, R_FT32_18 }, | |
3b4b0a62 | 183 | { BFD_RELOC_FT32_15, R_FT32_15 }, |
3f8107ab AM |
184 | }; |
185 | ||
186 | static reloc_howto_type * | |
187 | ft32_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
188 | bfd_reloc_code_real_type code) | |
189 | { | |
190 | unsigned int i; | |
191 | ||
192 | for (i = sizeof (ft32_reloc_map) / sizeof (ft32_reloc_map[0]); | |
193 | --i;) | |
194 | if (ft32_reloc_map [i].bfd_reloc_val == code) | |
195 | return & ft32_elf_howto_table [ft32_reloc_map[i].ft32_reloc_val]; | |
196 | ||
197 | return NULL; | |
198 | } | |
199 | ||
200 | static reloc_howto_type * | |
201 | ft32_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) | |
202 | { | |
203 | unsigned int i; | |
204 | ||
205 | for (i = 0; | |
206 | i < sizeof (ft32_elf_howto_table) / sizeof (ft32_elf_howto_table[0]); | |
207 | i++) | |
208 | if (ft32_elf_howto_table[i].name != NULL | |
209 | && strcasecmp (ft32_elf_howto_table[i].name, r_name) == 0) | |
210 | return &ft32_elf_howto_table[i]; | |
211 | ||
212 | return NULL; | |
213 | } | |
214 | ||
215 | /* Set the howto pointer for an FT32 ELF reloc. */ | |
216 | ||
217 | static void | |
218 | ft32_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED, | |
219 | arelent *cache_ptr, | |
220 | Elf_Internal_Rela *dst) | |
221 | { | |
222 | unsigned int r_type; | |
223 | ||
224 | r_type = ELF32_R_TYPE (dst->r_info); | |
225 | BFD_ASSERT (r_type < (unsigned int) R_FT32_max); | |
226 | cache_ptr->howto = & ft32_elf_howto_table [r_type]; | |
227 | } | |
228 | \f | |
229 | /* Relocate an FT32 ELF section. | |
230 | ||
231 | The RELOCATE_SECTION function is called by the new ELF backend linker | |
232 | to handle the relocations for a section. | |
233 | ||
234 | The relocs are always passed as Rela structures; if the section | |
235 | actually uses Rel structures, the r_addend field will always be | |
236 | zero. | |
237 | ||
238 | This function is responsible for adjusting the section contents as | |
239 | necessary, and (if using Rela relocs and generating a relocatable | |
240 | output file) adjusting the reloc addend as necessary. | |
241 | ||
242 | This function does not have to worry about setting the reloc | |
243 | address or the reloc symbol index. | |
244 | ||
245 | LOCAL_SYMS is a pointer to the swapped in local symbols. | |
246 | ||
247 | LOCAL_SECTIONS is an array giving the section in the input file | |
248 | corresponding to the st_shndx field of each local symbol. | |
249 | ||
250 | The global hash table entry for the global symbols can be found | |
251 | via elf_sym_hashes (input_bfd). | |
252 | ||
253 | When generating relocatable output, this function must handle | |
254 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is | |
255 | going to be the section symbol corresponding to the output | |
256 | section, which means that the addend must be adjusted | |
257 | accordingly. */ | |
258 | ||
259 | static bfd_boolean | |
260 | ft32_elf_relocate_section (bfd *output_bfd, | |
261 | struct bfd_link_info *info, | |
262 | bfd *input_bfd, | |
263 | asection *input_section, | |
264 | bfd_byte *contents, | |
265 | Elf_Internal_Rela *relocs, | |
266 | Elf_Internal_Sym *local_syms, | |
267 | asection **local_sections) | |
268 | { | |
269 | Elf_Internal_Shdr *symtab_hdr; | |
270 | struct elf_link_hash_entry **sym_hashes; | |
271 | Elf_Internal_Rela *rel; | |
272 | Elf_Internal_Rela *relend; | |
273 | ||
274 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; | |
275 | sym_hashes = elf_sym_hashes (input_bfd); | |
276 | relend = relocs + input_section->reloc_count; | |
277 | ||
278 | for (rel = relocs; rel < relend; rel ++) | |
279 | { | |
280 | reloc_howto_type *howto; | |
281 | unsigned long r_symndx; | |
282 | Elf_Internal_Sym *sym; | |
283 | asection *sec; | |
284 | struct elf_link_hash_entry *h; | |
285 | bfd_vma relocation; | |
286 | bfd_reloc_status_type r; | |
287 | const char *name; | |
288 | int r_type; | |
289 | ||
290 | r_type = ELF32_R_TYPE (rel->r_info); | |
291 | r_symndx = ELF32_R_SYM (rel->r_info); | |
292 | howto = ft32_elf_howto_table + r_type; | |
293 | h = NULL; | |
294 | sym = NULL; | |
295 | sec = NULL; | |
296 | ||
297 | if (r_symndx < symtab_hdr->sh_info) | |
298 | { | |
299 | sym = local_syms + r_symndx; | |
300 | sec = local_sections [r_symndx]; | |
301 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
302 | ||
303 | name = bfd_elf_string_from_elf_section | |
304 | (input_bfd, symtab_hdr->sh_link, sym->st_name); | |
305 | name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; | |
306 | } | |
307 | else | |
308 | { | |
309 | bfd_boolean unresolved_reloc, warned, ignored; | |
310 | ||
311 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
312 | r_symndx, symtab_hdr, sym_hashes, | |
313 | h, sec, relocation, | |
314 | unresolved_reloc, warned, ignored); | |
315 | ||
316 | name = h->root.root.string; | |
317 | } | |
318 | ||
319 | if (sec != NULL && discarded_section (sec)) | |
320 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, | |
321 | rel, 1, relend, howto, 0, contents); | |
322 | ||
0e1862bb | 323 | if (bfd_link_relocatable (info)) |
3f8107ab AM |
324 | continue; |
325 | ||
326 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
327 | contents, rel->r_offset, | |
328 | relocation, rel->r_addend); | |
329 | ||
330 | if (r != bfd_reloc_ok) | |
331 | { | |
332 | const char * msg = NULL; | |
333 | ||
334 | switch (r) | |
335 | { | |
336 | case bfd_reloc_overflow: | |
1a72702b | 337 | (*info->callbacks->reloc_overflow) |
3f8107ab AM |
338 | (info, (h ? &h->root : NULL), name, howto->name, |
339 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
340 | break; | |
341 | ||
342 | case bfd_reloc_undefined: | |
1a72702b AM |
343 | (*info->callbacks->undefined_symbol) |
344 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); | |
3f8107ab AM |
345 | break; |
346 | ||
347 | case bfd_reloc_outofrange: | |
348 | msg = _("internal error: out of range error"); | |
349 | break; | |
350 | ||
351 | case bfd_reloc_notsupported: | |
352 | msg = _("internal error: unsupported relocation error"); | |
353 | break; | |
354 | ||
355 | case bfd_reloc_dangerous: | |
356 | msg = _("internal error: dangerous relocation"); | |
357 | break; | |
358 | ||
359 | default: | |
360 | msg = _("internal error: unknown error"); | |
361 | break; | |
362 | } | |
363 | ||
364 | if (msg) | |
1a72702b AM |
365 | (*info->callbacks->warning) (info, msg, name, input_bfd, |
366 | input_section, rel->r_offset); | |
3f8107ab AM |
367 | } |
368 | } | |
369 | ||
370 | return TRUE; | |
371 | } | |
372 | \f | |
373 | #define ELF_ARCH bfd_arch_ft32 | |
374 | #define ELF_MACHINE_CODE EM_FT32 | |
375 | #define ELF_MAXPAGESIZE 0x1 | |
376 | ||
377 | #define TARGET_LITTLE_SYM ft32_elf32_vec | |
378 | #define TARGET_LITTLE_NAME "elf32-ft32" | |
379 | ||
380 | #define elf_info_to_howto_rel NULL | |
381 | #define elf_info_to_howto ft32_info_to_howto_rela | |
382 | #define elf_backend_relocate_section ft32_elf_relocate_section | |
383 | ||
384 | #define elf_backend_can_gc_sections 1 | |
385 | #define elf_backend_rela_normal 1 | |
386 | ||
387 | #define bfd_elf32_bfd_reloc_type_lookup ft32_reloc_type_lookup | |
388 | #define bfd_elf32_bfd_reloc_name_lookup ft32_reloc_name_lookup | |
389 | ||
390 | #include "elf32-target.h" |