[PATCH 2/57][Arm][GAS] Add support for MVE instructions: vpst, vadd, vsub and vabd
[binutils-gdb.git] / bfd / elf32-ip2k.c
blob43e7be63dad2b1e3640f159f4bee20d044ef984b
1 /* Ubicom IP2xxx specific support for 32-bit ELF
2 Copyright (C) 2000-2019 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
21 #include "sysdep.h"
22 #include "bfd.h"
23 #include "libbfd.h"
24 #include "elf-bfd.h"
25 #include "elf/ip2k.h"
27 /* Struct used to pass miscellaneous paramaters which
28 helps to avoid overly long parameter lists. */
29 struct misc
31 Elf_Internal_Shdr * symtab_hdr;
32 Elf_Internal_Rela * irelbase;
33 bfd_byte * contents;
34 Elf_Internal_Sym * isymbuf;
37 struct ip2k_opcode
39 unsigned short opcode;
40 unsigned short mask;
43 static bfd_boolean ip2k_relaxed = FALSE;
45 static const struct ip2k_opcode ip2k_page_opcode[] =
47 {0x0010, 0xFFF8}, /* Page. */
48 {0x0000, 0x0000},
51 #define IS_PAGE_OPCODE(code) \
52 ip2k_is_opcode (code, ip2k_page_opcode)
54 static const struct ip2k_opcode ip2k_jmp_opcode[] =
56 {0xE000, 0xE000}, /* Jmp. */
57 {0x0000, 0x0000},
60 #define IS_JMP_OPCODE(code) \
61 ip2k_is_opcode (code, ip2k_jmp_opcode)
63 static const struct ip2k_opcode ip2k_snc_opcode[] =
65 {0xA00B, 0xFFFF}, /* Snc. */
66 {0x0000, 0x0000},
69 #define IS_SNC_OPCODE(code) \
70 ip2k_is_opcode (code, ip2k_snc_opcode)
72 static const struct ip2k_opcode ip2k_inc_1sp_opcode[] =
74 {0x2B81, 0xFFFF}, /* Inc 1(SP). */
75 {0x0000, 0x0000},
78 #define IS_INC_1SP_OPCODE(code) \
79 ip2k_is_opcode (code, ip2k_inc_1sp_opcode)
81 static const struct ip2k_opcode ip2k_add_2sp_w_opcode[] =
83 {0x1F82, 0xFFFF}, /* Add 2(SP),w. */
84 {0x0000, 0x0000},
87 #define IS_ADD_2SP_W_OPCODE(code) \
88 ip2k_is_opcode (code, ip2k_add_2sp_w_opcode)
90 static const struct ip2k_opcode ip2k_add_w_wreg_opcode[] =
92 {0x1C0A, 0xFFFF}, /* Add w,wreg. */
93 {0x1E0A, 0xFFFF}, /* Add wreg,w. */
94 {0x0000, 0x0000},
97 #define IS_ADD_W_WREG_OPCODE(code) \
98 ip2k_is_opcode (code, ip2k_add_w_wreg_opcode)
100 static const struct ip2k_opcode ip2k_add_pcl_w_opcode[] =
102 {0x1E09, 0xFFFF}, /* Add pcl,w. */
103 {0x0000, 0x0000},
106 #define IS_ADD_PCL_W_OPCODE(code) \
107 ip2k_is_opcode (code, ip2k_add_pcl_w_opcode)
109 static const struct ip2k_opcode ip2k_skip_opcodes[] =
111 {0xB000, 0xF000}, /* sb */
112 {0xA000, 0xF000}, /* snb */
113 {0x7600, 0xFE00}, /* cse/csne #lit */
114 {0x5800, 0xFC00}, /* incsnz */
115 {0x4C00, 0xFC00}, /* decsnz */
116 {0x4000, 0xFC00}, /* cse/csne */
117 {0x3C00, 0xFC00}, /* incsz */
118 {0x2C00, 0xFC00}, /* decsz */
119 {0x0000, 0x0000},
122 #define IS_SKIP_OPCODE(code) \
123 ip2k_is_opcode (code, ip2k_skip_opcodes)
125 /* Relocation tables. */
126 static reloc_howto_type ip2k_elf_howto_table [] =
128 #define IP2K_HOWTO(t,rs,s,bs,pr,bp,name,sm,dm) \
129 HOWTO(t, /* type */ \
130 rs, /* rightshift */ \
131 s, /* size (0 = byte, 1 = short, 2 = long) */ \
132 bs, /* bitsize */ \
133 pr, /* pc_relative */ \
134 bp, /* bitpos */ \
135 complain_overflow_dont,/* complain_on_overflow */ \
136 bfd_elf_generic_reloc,/* special_function */ \
137 name, /* name */ \
138 FALSE, /* partial_inplace */ \
139 sm, /* src_mask */ \
140 dm, /* dst_mask */ \
141 pr) /* pcrel_offset */
143 /* This reloc does nothing. */
144 IP2K_HOWTO (R_IP2K_NONE, 0,3,0, FALSE, 0, "R_IP2K_NONE", 0, 0),
145 /* A 16 bit absolute relocation. */
146 IP2K_HOWTO (R_IP2K_16, 0,1,16, FALSE, 0, "R_IP2K_16", 0, 0xffff),
147 /* A 32 bit absolute relocation. */
148 IP2K_HOWTO (R_IP2K_32, 0,2,32, FALSE, 0, "R_IP2K_32", 0, 0xffffffff),
149 /* A 8-bit data relocation for the FR9 field. Ninth bit is computed specially. */
150 IP2K_HOWTO (R_IP2K_FR9, 0,1,9, FALSE, 0, "R_IP2K_FR9", 0, 0x00ff),
151 /* A 4-bit data relocation. */
152 IP2K_HOWTO (R_IP2K_BANK, 8,1,4, FALSE, 0, "R_IP2K_BANK", 0, 0x000f),
153 /* A 13-bit insn relocation - word address => right-shift 1 bit extra. */
154 IP2K_HOWTO (R_IP2K_ADDR16CJP, 1,1,13, FALSE, 0, "R_IP2K_ADDR16CJP", 0, 0x1fff),
155 /* A 3-bit insn relocation - word address => right-shift 1 bit extra. */
156 IP2K_HOWTO (R_IP2K_PAGE3, 14,1,3, FALSE, 0, "R_IP2K_PAGE3", 0, 0x0007),
157 /* Two 8-bit data relocations. */
158 IP2K_HOWTO (R_IP2K_LO8DATA, 0,1,8, FALSE, 0, "R_IP2K_LO8DATA", 0, 0x00ff),
159 IP2K_HOWTO (R_IP2K_HI8DATA, 8,1,8, FALSE, 0, "R_IP2K_HI8DATA", 0, 0x00ff),
160 /* Two 8-bit insn relocations. word address => right-shift 1 bit extra. */
161 IP2K_HOWTO (R_IP2K_LO8INSN, 1,1,8, FALSE, 0, "R_IP2K_LO8INSN", 0, 0x00ff),
162 IP2K_HOWTO (R_IP2K_HI8INSN, 9,1,8, FALSE, 0, "R_IP2K_HI8INSN", 0, 0x00ff),
164 /* Special 1 bit relocation for SKIP instructions. */
165 IP2K_HOWTO (R_IP2K_PC_SKIP, 1,1,1, FALSE, 12, "R_IP2K_PC_SKIP", 0xfffe, 0x1000),
166 /* 16 bit word address. */
167 IP2K_HOWTO (R_IP2K_TEXT, 1,1,16, FALSE, 0, "R_IP2K_TEXT", 0, 0xffff),
168 /* A 7-bit offset relocation for the FR9 field. Eigth and ninth bit comes from insn. */
169 IP2K_HOWTO (R_IP2K_FR_OFFSET, 0,1,9, FALSE, 0, "R_IP2K_FR_OFFSET", 0x180, 0x007f),
170 /* Bits 23:16 of an address. */
171 IP2K_HOWTO (R_IP2K_EX8DATA, 16,1,8, FALSE, 0, "R_IP2K_EX8DATA", 0, 0x00ff),
175 /* Map BFD reloc types to IP2K ELF reloc types. */
177 static reloc_howto_type *
178 ip2k_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
179 bfd_reloc_code_real_type code)
181 /* Note that the ip2k_elf_howto_table is indxed by the R_
182 constants. Thus, the order that the howto records appear in the
183 table *must* match the order of the relocation types defined in
184 include/elf/ip2k.h. */
186 switch (code)
188 case BFD_RELOC_NONE:
189 return &ip2k_elf_howto_table[ (int) R_IP2K_NONE];
190 case BFD_RELOC_16:
191 return &ip2k_elf_howto_table[ (int) R_IP2K_16];
192 case BFD_RELOC_32:
193 return &ip2k_elf_howto_table[ (int) R_IP2K_32];
194 case BFD_RELOC_IP2K_FR9:
195 return &ip2k_elf_howto_table[ (int) R_IP2K_FR9];
196 case BFD_RELOC_IP2K_BANK:
197 return &ip2k_elf_howto_table[ (int) R_IP2K_BANK];
198 case BFD_RELOC_IP2K_ADDR16CJP:
199 return &ip2k_elf_howto_table[ (int) R_IP2K_ADDR16CJP];
200 case BFD_RELOC_IP2K_PAGE3:
201 return &ip2k_elf_howto_table[ (int) R_IP2K_PAGE3];
202 case BFD_RELOC_IP2K_LO8DATA:
203 return &ip2k_elf_howto_table[ (int) R_IP2K_LO8DATA];
204 case BFD_RELOC_IP2K_HI8DATA:
205 return &ip2k_elf_howto_table[ (int) R_IP2K_HI8DATA];
206 case BFD_RELOC_IP2K_LO8INSN:
207 return &ip2k_elf_howto_table[ (int) R_IP2K_LO8INSN];
208 case BFD_RELOC_IP2K_HI8INSN:
209 return &ip2k_elf_howto_table[ (int) R_IP2K_HI8INSN];
210 case BFD_RELOC_IP2K_PC_SKIP:
211 return &ip2k_elf_howto_table[ (int) R_IP2K_PC_SKIP];
212 case BFD_RELOC_IP2K_TEXT:
213 return &ip2k_elf_howto_table[ (int) R_IP2K_TEXT];
214 case BFD_RELOC_IP2K_FR_OFFSET:
215 return &ip2k_elf_howto_table[ (int) R_IP2K_FR_OFFSET];
216 case BFD_RELOC_IP2K_EX8DATA:
217 return &ip2k_elf_howto_table[ (int) R_IP2K_EX8DATA];
218 default:
219 /* Pacify gcc -Wall. */
220 return NULL;
222 return NULL;
225 static reloc_howto_type *
226 ip2k_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
228 unsigned int i;
230 for (i = 0;
231 i < sizeof (ip2k_elf_howto_table) / sizeof (ip2k_elf_howto_table[0]);
232 i++)
233 if (ip2k_elf_howto_table[i].name != NULL
234 && strcasecmp (ip2k_elf_howto_table[i].name, r_name) == 0)
235 return &ip2k_elf_howto_table[i];
237 return NULL;
240 static void
241 ip2k_get_mem (bfd *abfd ATTRIBUTE_UNUSED,
242 bfd_byte *addr,
243 int length,
244 bfd_byte *ptr)
246 while (length --)
247 * ptr ++ = bfd_get_8 (abfd, addr ++);
250 static bfd_boolean
251 ip2k_is_opcode (bfd_byte *code, const struct ip2k_opcode *opcodes)
253 unsigned short insn = (code[0] << 8) | code[1];
255 while (opcodes->mask != 0)
257 if ((insn & opcodes->mask) == opcodes->opcode)
258 return TRUE;
260 opcodes ++;
263 return FALSE;
266 #define PAGENO(ABSADDR) ((ABSADDR) & 0xFFFFC000)
267 #define BASEADDR(SEC) ((SEC)->output_section->vma + (SEC)->output_offset)
269 #define UNDEFINED_SYMBOL (~(bfd_vma)0)
271 /* Return the value of the symbol associated with the relocation IREL. */
273 static bfd_vma
274 symbol_value (bfd *abfd,
275 Elf_Internal_Shdr *symtab_hdr,
276 Elf_Internal_Sym *isymbuf,
277 Elf_Internal_Rela *irel)
279 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
281 Elf_Internal_Sym *isym;
282 asection *sym_sec;
284 isym = isymbuf + ELF32_R_SYM (irel->r_info);
285 if (isym->st_shndx == SHN_UNDEF)
286 sym_sec = bfd_und_section_ptr;
287 else if (isym->st_shndx == SHN_ABS)
288 sym_sec = bfd_abs_section_ptr;
289 else if (isym->st_shndx == SHN_COMMON)
290 sym_sec = bfd_com_section_ptr;
291 else
292 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
294 return isym->st_value + BASEADDR (sym_sec);
296 else
298 unsigned long indx;
299 struct elf_link_hash_entry *h;
301 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
302 h = elf_sym_hashes (abfd)[indx];
303 BFD_ASSERT (h != NULL);
305 if (h->root.type != bfd_link_hash_defined
306 && h->root.type != bfd_link_hash_defweak)
307 return UNDEFINED_SYMBOL;
309 return (h->root.u.def.value + BASEADDR (h->root.u.def.section));
313 /* Determine if the instruction sequence matches that for
314 the prologue of a switch dispatch table with fewer than
315 128 entries.
318 page $nnn0
319 jmp $nnn0
320 add w,wreg
321 add pcl,w
322 addr=>
323 page $nnn1
324 jmp $nnn1
325 page $nnn2
326 jmp $nnn2
328 page $nnnN
329 jmp $nnnN
331 After relaxation.
333 page $nnn0
334 jmp $nnn0
335 add pcl,w
336 addr=>
337 jmp $nnn1
338 jmp $nnn2
340 jmp $nnnN */
342 static int
343 ip2k_is_switch_table_128 (bfd *abfd ATTRIBUTE_UNUSED,
344 asection *sec,
345 bfd_vma addr,
346 bfd_byte *contents)
348 bfd_byte code[4];
349 int table_index = 0;
351 /* Check current page-jmp. */
352 if (addr + 4 > sec->size)
353 return -1;
355 ip2k_get_mem (abfd, contents + addr, 4, code);
357 if ((! IS_PAGE_OPCODE (code + 0))
358 || (! IS_JMP_OPCODE (code + 2)))
359 return -1;
361 /* Search back. */
362 while (1)
364 if (addr < 4)
365 return -1;
367 /* Check previous 2 instructions. */
368 ip2k_get_mem (abfd, contents + addr - 4, 4, code);
369 if ((IS_ADD_W_WREG_OPCODE (code + 0))
370 && (IS_ADD_PCL_W_OPCODE (code + 2)))
371 return table_index;
373 if ((! IS_PAGE_OPCODE (code + 0))
374 || (! IS_JMP_OPCODE (code + 2)))
375 return -1;
377 table_index++;
378 addr -= 4;
382 /* Determine if the instruction sequence matches that for
383 the prologue switch dispatch table with fewer than
384 256 entries but more than 127.
386 Before relaxation.
387 push %lo8insn(label) ; Push address of table
388 push %hi8insn(label)
389 add w,wreg ; index*2 => offset
390 snc ; CARRY SET?
391 inc 1(sp) ; Propagate MSB into table address
392 add 2(sp),w ; Add low bits of offset to table address
393 snc ; and handle any carry-out
394 inc 1(sp)
395 addr=>
396 page __indjmp ; Do an indirect jump to that location
397 jmp __indjmp
398 label: ; case dispatch table starts here
399 page $nnn1
400 jmp $nnn1
401 page $nnn2
402 jmp $nnn2
404 page $nnnN
405 jmp $nnnN
407 After relaxation.
408 push %lo8insn(label) ; Push address of table
409 push %hi8insn(label)
410 add 2(sp),w ; Add low bits of offset to table address
411 snc ; and handle any carry-out
412 inc 1(sp)
413 addr=>
414 page __indjmp ; Do an indirect jump to that location
415 jmp __indjmp
416 label: ; case dispatch table starts here
417 jmp $nnn1
418 jmp $nnn2
420 jmp $nnnN */
422 static int
423 ip2k_is_switch_table_256 (bfd *abfd ATTRIBUTE_UNUSED,
424 asection *sec,
425 bfd_vma addr,
426 bfd_byte *contents)
428 bfd_byte code[16];
429 int table_index = 0;
431 /* Check current page-jmp. */
432 if (addr + 4 > sec->size)
433 return -1;
435 ip2k_get_mem (abfd, contents + addr, 4, code);
436 if ((! IS_PAGE_OPCODE (code + 0))
437 || (! IS_JMP_OPCODE (code + 2)))
438 return -1;
440 /* Search back. */
441 while (1)
443 if (addr < 16)
444 return -1;
446 /* Check previous 8 instructions. */
447 ip2k_get_mem (abfd, contents + addr - 16, 16, code);
448 if ((IS_ADD_W_WREG_OPCODE (code + 0))
449 && (IS_SNC_OPCODE (code + 2))
450 && (IS_INC_1SP_OPCODE (code + 4))
451 && (IS_ADD_2SP_W_OPCODE (code + 6))
452 && (IS_SNC_OPCODE (code + 8))
453 && (IS_INC_1SP_OPCODE (code + 10))
454 && (IS_PAGE_OPCODE (code + 12))
455 && (IS_JMP_OPCODE (code + 14)))
456 return table_index;
458 if ((IS_ADD_W_WREG_OPCODE (code + 2))
459 && (IS_SNC_OPCODE (code + 4))
460 && (IS_INC_1SP_OPCODE (code + 6))
461 && (IS_ADD_2SP_W_OPCODE (code + 8))
462 && (IS_SNC_OPCODE (code + 10))
463 && (IS_INC_1SP_OPCODE (code + 12))
464 && (IS_JMP_OPCODE (code + 14)))
465 return table_index;
467 if ((! IS_PAGE_OPCODE (code + 0))
468 || (! IS_JMP_OPCODE (code + 2)))
469 return -1;
471 table_index++;
472 addr -= 4;
476 /* Returns the expected page state for the given instruction not including
477 the effect of page instructions. */
479 static bfd_vma
480 ip2k_nominal_page_bits (bfd *abfd ATTRIBUTE_UNUSED,
481 asection *sec,
482 bfd_vma addr,
483 bfd_byte *contents)
485 bfd_vma page = PAGENO (BASEADDR (sec) + addr);
487 /* Check if section flows into this page. If not then the page
488 bits are assumed to match the PC. This will be true unless
489 the user has a page instruction without a call/jump, in which
490 case they are on their own. */
491 if (PAGENO (BASEADDR (sec)) == page)
492 return page;
494 /* Section flows across page boundary. The page bits should match
495 the PC unless there is a possible flow from the previous page,
496 in which case it is not possible to determine the value of the
497 page bits. */
498 while (PAGENO (BASEADDR (sec) + addr - 2) == page)
500 bfd_byte code[2];
502 addr -= 2;
503 ip2k_get_mem (abfd, contents + addr, 2, code);
504 if (!IS_PAGE_OPCODE (code))
505 continue;
507 /* Found a page instruction, check if jump table. */
508 if (ip2k_is_switch_table_128 (abfd, sec, addr, contents) != -1)
509 /* Jump table => page is conditional. */
510 continue;
512 if (ip2k_is_switch_table_256 (abfd, sec, addr, contents) != -1)
513 /* Jump table => page is conditional. */
514 continue;
516 /* Found a page instruction, check if conditional. */
517 if (addr >= 2)
519 ip2k_get_mem (abfd, contents + addr - 2, 2, code);
520 if (IS_SKIP_OPCODE (code))
521 /* Page is conditional. */
522 continue;
525 /* Unconditional page instruction => page bits should be correct. */
526 return page;
529 /* Flow from previous page => page bits are impossible to determine. */
530 return 0;
533 static bfd_boolean
534 ip2k_test_page_insn (bfd *abfd ATTRIBUTE_UNUSED,
535 asection *sec,
536 Elf_Internal_Rela *irel,
537 struct misc *misc)
539 bfd_vma symval;
541 /* Get the value of the symbol referred to by the reloc. */
542 symval = symbol_value (abfd, misc->symtab_hdr, misc->isymbuf, irel);
543 if (symval == UNDEFINED_SYMBOL)
544 /* This appears to be a reference to an undefined
545 symbol. Just ignore it--it will be caught by the
546 regular reloc processing. */
547 return FALSE;
549 /* Test if we can delete this page instruction. */
550 if (PAGENO (symval + irel->r_addend) !=
551 ip2k_nominal_page_bits (abfd, sec, irel->r_offset, misc->contents))
552 return FALSE;
554 return TRUE;
557 /* Parts of a Stabs entry. */
559 #define STRDXOFF 0
560 #define TYPEOFF 4
561 #define OTHEROFF 5
562 #define DESCOFF 6
563 #define VALOFF 8
564 #define STABSIZE 12
566 /* Adjust all the relocations entries after adding or inserting instructions. */
568 static void
569 adjust_all_relocations (bfd *abfd,
570 asection *sec,
571 bfd_vma addr,
572 bfd_vma endaddr,
573 int count,
574 int noadj)
576 Elf_Internal_Shdr *symtab_hdr;
577 Elf_Internal_Sym *isymbuf, *isym, *isymend;
578 unsigned int shndx;
579 Elf_Internal_Rela *irel, *irelend, *irelbase;
580 struct elf_link_hash_entry **sym_hashes;
581 struct elf_link_hash_entry **end_hashes;
582 unsigned int symcount;
583 asection *stab;
585 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
586 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
588 shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
590 irelbase = elf_section_data (sec)->relocs;
591 irelend = irelbase + sec->reloc_count;
593 for (irel = irelbase; irel < irelend; irel++)
595 if (ELF32_R_TYPE (irel->r_info) != R_IP2K_NONE)
597 /* Get the value of the symbol referred to by the reloc. */
598 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
600 asection *sym_sec;
602 /* A local symbol. */
603 isym = isymbuf + ELF32_R_SYM (irel->r_info);
604 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
606 if (isym->st_shndx == shndx)
608 bfd_vma baseaddr = BASEADDR (sec);
609 bfd_vma symval = BASEADDR (sym_sec) + isym->st_value
610 + irel->r_addend;
612 if ((baseaddr + addr + noadj) <= symval
613 && symval < (baseaddr + endaddr))
614 irel->r_addend += count;
619 /* Do this only for PC space relocations. */
620 if (addr <= irel->r_offset && irel->r_offset < endaddr)
621 irel->r_offset += count;
624 /* Now fix the stab relocations. */
625 stab = bfd_get_section_by_name (abfd, ".stab");
626 if (stab)
628 bfd_byte *stabcontents, *stabend, *stabp;
629 bfd_size_type stab_size = stab->rawsize ? stab->rawsize : stab->size;
631 irelbase = elf_section_data (stab)->relocs;
632 irelend = irelbase + stab->reloc_count;
634 /* Pull out the contents of the stab section. */
635 if (elf_section_data (stab)->this_hdr.contents != NULL)
636 stabcontents = elf_section_data (stab)->this_hdr.contents;
637 else
639 if (!bfd_malloc_and_get_section (abfd, stab, &stabcontents))
641 if (stabcontents != NULL)
642 free (stabcontents);
643 return;
646 /* We need to remember this. */
647 elf_section_data (stab)->this_hdr.contents = stabcontents;
650 stabend = stabcontents + stab_size;
652 for (irel = irelbase; irel < irelend; irel++)
654 if (ELF32_R_TYPE (irel->r_info) != R_IP2K_NONE)
656 /* Get the value of the symbol referred to by the reloc. */
657 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
659 asection *sym_sec;
661 /* A local symbol. */
662 isym = isymbuf + ELF32_R_SYM (irel->r_info);
663 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
665 if (sym_sec == sec)
667 const char *name;
668 unsigned char type;
669 bfd_vma value;
670 bfd_vma baseaddr = BASEADDR (sec);
671 bfd_vma symval = BASEADDR (sym_sec) + isym->st_value
672 + irel->r_addend;
674 if ((baseaddr + addr) <= symval
675 && symval <= (baseaddr + endaddr))
676 irel->r_addend += count;
678 /* Go hunt up a function and fix its line info if needed. */
679 stabp = stabcontents + irel->r_offset - 8;
681 /* Go pullout the stab entry. */
682 type = bfd_h_get_8 (abfd, stabp + TYPEOFF);
683 value = bfd_h_get_32 (abfd, stabp + VALOFF);
685 name = bfd_get_stab_name (type);
687 if (strcmp (name, "FUN") == 0)
689 int function_adjusted = 0;
691 if (symval > (baseaddr + addr))
692 /* Not in this function. */
693 continue;
695 /* Hey we got a function hit. */
696 stabp += STABSIZE;
697 for (;stabp < stabend; stabp += STABSIZE)
699 /* Go pullout the stab entry. */
700 type = bfd_h_get_8 (abfd, stabp + TYPEOFF);
701 value = bfd_h_get_32 (abfd, stabp + VALOFF);
703 name = bfd_get_stab_name (type);
705 if (strcmp (name, "FUN") == 0)
707 /* Hit another function entry. */
708 if (function_adjusted)
710 /* Adjust the value. */
711 value += count;
713 /* We need to put it back. */
714 bfd_h_put_32 (abfd, value,stabp + VALOFF);
717 /* And then bale out. */
718 break;
721 if (strcmp (name, "SLINE") == 0)
723 /* Got a line entry. */
724 if ((baseaddr + addr) <= (symval + value))
726 /* Adjust the line entry. */
727 value += count;
729 /* We need to put it back. */
730 bfd_h_put_32 (abfd, value,stabp + VALOFF);
731 function_adjusted = 1;
742 /* When adding an instruction back it is sometimes necessary to move any
743 global or local symbol that was referencing the first instruction of
744 the moved block to refer to the first instruction of the inserted block.
746 For example adding a PAGE instruction before a CALL or JMP requires
747 that any label on the CALL or JMP is moved to the PAGE insn. */
748 addr += noadj;
750 /* Adjust the local symbols defined in this section. */
751 isymend = isymbuf + symtab_hdr->sh_info;
752 for (isym = isymbuf; isym < isymend; isym++)
754 if (isym->st_shndx == shndx
755 && addr <= isym->st_value
756 && isym->st_value < endaddr)
757 isym->st_value += count;
760 /* Now adjust the global symbols defined in this section. */
761 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
762 - symtab_hdr->sh_info);
763 sym_hashes = elf_sym_hashes (abfd);
764 end_hashes = sym_hashes + symcount;
765 for (; sym_hashes < end_hashes; sym_hashes++)
767 struct elf_link_hash_entry *sym_hash = *sym_hashes;
769 if ((sym_hash->root.type == bfd_link_hash_defined
770 || sym_hash->root.type == bfd_link_hash_defweak)
771 && sym_hash->root.u.def.section == sec)
773 if (addr <= sym_hash->root.u.def.value
774 && sym_hash->root.u.def.value < endaddr)
775 sym_hash->root.u.def.value += count;
779 return;
782 /* Delete some bytes from a section while relaxing. */
784 static bfd_boolean
785 ip2k_elf_relax_delete_bytes (bfd *abfd,
786 asection *sec,
787 bfd_vma addr,
788 int count)
790 bfd_byte *contents = elf_section_data (sec)->this_hdr.contents;
791 bfd_vma endaddr = sec->size;
793 /* Actually delete the bytes. */
794 memmove (contents + addr, contents + addr + count,
795 endaddr - addr - count);
797 sec->size -= count;
799 adjust_all_relocations (abfd, sec, addr + count, endaddr, -count, 0);
800 return TRUE;
803 static bfd_boolean
804 ip2k_delete_page_insn (bfd *abfd ATTRIBUTE_UNUSED,
805 asection *sec,
806 Elf_Internal_Rela *irel,
807 bfd_boolean *again,
808 struct misc *misc)
810 /* Note that we've changed the relocs, section contents, etc. */
811 elf_section_data (sec)->relocs = misc->irelbase;
812 elf_section_data (sec)->this_hdr.contents = misc->contents;
813 misc->symtab_hdr->contents = (bfd_byte *) misc->isymbuf;
815 /* Fix the relocation's type. */
816 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), R_IP2K_NONE);
818 /* Delete the PAGE insn. */
819 if (!ip2k_elf_relax_delete_bytes (abfd, sec, irel->r_offset, 2))
820 return FALSE;
822 /* Modified => will need to iterate relaxation again. */
823 *again = TRUE;
825 return TRUE;
828 static bfd_boolean
829 ip2k_relax_switch_table_128 (bfd *abfd ATTRIBUTE_UNUSED,
830 asection *sec,
831 Elf_Internal_Rela *irel,
832 bfd_boolean *again,
833 struct misc *misc)
835 Elf_Internal_Rela *irelend = misc->irelbase + sec->reloc_count;
836 Elf_Internal_Rela *ireltest = irel;
837 bfd_byte code[4];
838 bfd_vma addr;
840 /* Test all page instructions. */
841 addr = irel->r_offset;
842 while (1)
844 if (addr + 4 > sec->size)
845 break;
847 ip2k_get_mem (abfd, misc->contents + addr, 4, code);
848 if ((! IS_PAGE_OPCODE (code + 0))
849 || (! IS_JMP_OPCODE (code + 2)))
850 break;
852 /* Validate relocation entry (every entry should have a matching
853 relocation entry). */
854 if (ireltest >= irelend)
856 _bfd_error_handler (_("ip2k relaxer: switch table without complete matching relocation information."));
857 return FALSE;
860 if (ireltest->r_offset != addr)
862 _bfd_error_handler (_("ip2k relaxer: switch table without complete matching relocation information."));
863 return FALSE;
866 if (! ip2k_test_page_insn (abfd, sec, ireltest, misc))
867 /* Un-removable page insn => nothing can be done. */
868 return TRUE;
870 addr += 4;
871 ireltest += 2;
874 /* Relaxable. Adjust table header. */
875 ip2k_get_mem (abfd, misc->contents + irel->r_offset - 4, 4, code);
876 if ((! IS_ADD_W_WREG_OPCODE (code + 0))
877 || (! IS_ADD_PCL_W_OPCODE (code + 2)))
879 _bfd_error_handler (_("ip2k relaxer: switch table header corrupt."));
880 return FALSE;
883 if (!ip2k_elf_relax_delete_bytes (abfd, sec, irel->r_offset - 4, 2))
884 return FALSE;
886 *again = TRUE;
888 /* Delete all page instructions in table. */
889 while (irel < ireltest)
891 if (!ip2k_delete_page_insn (abfd, sec, irel, again, misc))
892 return FALSE;
893 irel += 2;
896 return TRUE;
899 static bfd_boolean
900 ip2k_relax_switch_table_256 (bfd *abfd ATTRIBUTE_UNUSED,
901 asection *sec,
902 Elf_Internal_Rela *irel,
903 bfd_boolean *again,
904 struct misc *misc)
906 Elf_Internal_Rela *irelend = misc->irelbase + sec->reloc_count;
907 Elf_Internal_Rela *ireltest = irel;
908 bfd_byte code[12];
909 bfd_vma addr;
911 /* Test all page instructions. */
912 addr = irel->r_offset;
914 while (1)
916 if (addr + 4 > sec->size)
917 break;
919 ip2k_get_mem (abfd, misc->contents + addr, 4, code);
921 if ((! IS_PAGE_OPCODE (code + 0))
922 || (! IS_JMP_OPCODE (code + 2)))
923 break;
925 /* Validate relocation entry (every entry should have a matching
926 relocation entry). */
927 if (ireltest >= irelend)
929 _bfd_error_handler (_("ip2k relaxer: switch table without complete matching relocation information."));
930 return FALSE;
933 if (ireltest->r_offset != addr)
935 _bfd_error_handler (_("ip2k relaxer: switch table without complete matching relocation information."));
936 return FALSE;
939 if (!ip2k_test_page_insn (abfd, sec, ireltest, misc))
940 /* Un-removable page insn => nothing can be done. */
941 return TRUE;
943 addr += 4;
944 ireltest += 2;
947 /* Relaxable. Adjust table header. */
948 ip2k_get_mem (abfd, misc->contents + irel->r_offset - 4, 2, code);
949 if (IS_PAGE_OPCODE (code))
950 addr = irel->r_offset - 16;
951 else
952 addr = irel->r_offset - 14;
954 ip2k_get_mem (abfd, misc->contents + addr, 12, code);
955 if ((!IS_ADD_W_WREG_OPCODE (code + 0))
956 || (!IS_SNC_OPCODE (code + 2))
957 || (!IS_INC_1SP_OPCODE (code + 4))
958 || (!IS_ADD_2SP_W_OPCODE (code + 6))
959 || (!IS_SNC_OPCODE (code + 8))
960 || (!IS_INC_1SP_OPCODE (code + 10)))
962 _bfd_error_handler (_("ip2k relaxer: switch table header corrupt."));
963 return FALSE;
966 /* Delete first 3 opcodes. */
967 if (!ip2k_elf_relax_delete_bytes (abfd, sec, addr + 0, 6))
968 return FALSE;
970 *again = TRUE;
972 /* Delete all page instructions in table. */
973 while (irel < ireltest)
975 if (!ip2k_delete_page_insn (abfd, sec, irel, again, misc))
976 return FALSE;
977 irel += 2;
980 return TRUE;
983 /* This function handles relaxation of a section in a specific page. */
985 static bfd_boolean
986 ip2k_elf_relax_section_page (bfd *abfd,
987 asection *sec,
988 bfd_boolean *again,
989 struct misc *misc,
990 unsigned long page_start,
991 unsigned long page_end)
993 Elf_Internal_Rela *irelend = misc->irelbase + sec->reloc_count;
994 Elf_Internal_Rela *irel;
995 int switch_table_128;
996 int switch_table_256;
998 /* Walk thru the section looking for relaxation opportunities. */
999 for (irel = misc->irelbase; irel < irelend; irel++)
1001 if (ELF32_R_TYPE (irel->r_info) != (int) R_IP2K_PAGE3)
1002 /* Ignore non page instructions. */
1003 continue;
1005 if (BASEADDR (sec) + irel->r_offset < page_start)
1006 /* Ignore page instructions on earlier page - they have
1007 already been processed. Remember that there is code flow
1008 that crosses a page boundary. */
1009 continue;
1011 if (BASEADDR (sec) + irel->r_offset > page_end)
1012 /* Flow beyond end of page => nothing more to do for this page. */
1013 return TRUE;
1015 /* Detect switch tables. */
1016 switch_table_128 = ip2k_is_switch_table_128 (abfd, sec, irel->r_offset, misc->contents);
1017 switch_table_256 = ip2k_is_switch_table_256 (abfd, sec, irel->r_offset, misc->contents);
1019 if ((switch_table_128 > 0) || (switch_table_256 > 0))
1020 /* If the index is greater than 0 then it has already been processed. */
1021 continue;
1023 if (switch_table_128 == 0)
1025 if (!ip2k_relax_switch_table_128 (abfd, sec, irel, again, misc))
1026 return FALSE;
1028 continue;
1031 if (switch_table_256 == 0)
1033 if (!ip2k_relax_switch_table_256 (abfd, sec, irel, again, misc))
1034 return FALSE;
1036 continue;
1039 /* Simple relax. */
1040 if (ip2k_test_page_insn (abfd, sec, irel, misc))
1042 if (!ip2k_delete_page_insn (abfd, sec, irel, again, misc))
1043 return FALSE;
1045 continue;
1049 return TRUE;
1052 /* This function handles relaxing for the ip2k.
1054 Principle: Start with the first page and remove page instructions that
1055 are not require on this first page. By removing page instructions more
1056 code will fit into this page - repeat until nothing more can be achieved
1057 for this page. Move on to the next page.
1059 Processing the pages one at a time from the lowest page allows a removal
1060 only policy to be used - pages can be removed but are never reinserted. */
1062 static bfd_boolean
1063 ip2k_elf_relax_section (bfd *abfd,
1064 asection *sec,
1065 struct bfd_link_info *link_info,
1066 bfd_boolean *again)
1068 Elf_Internal_Shdr *symtab_hdr;
1069 Elf_Internal_Rela *internal_relocs;
1070 bfd_byte *contents = NULL;
1071 Elf_Internal_Sym *isymbuf = NULL;
1072 static asection * first_section = NULL;
1073 static unsigned long search_addr;
1074 static unsigned long page_start = 0;
1075 static unsigned long page_end = 0;
1076 static unsigned int pass = 0;
1077 static bfd_boolean new_pass = FALSE;
1078 static bfd_boolean changed = FALSE;
1079 struct misc misc;
1081 /* Assume nothing changes. */
1082 *again = FALSE;
1084 if (first_section == NULL)
1086 ip2k_relaxed = TRUE;
1087 first_section = sec;
1090 if (first_section == sec)
1092 pass++;
1093 new_pass = TRUE;
1096 /* We don't have to do anything for a relocatable link,
1097 if this section does not have relocs, or if this is
1098 not a code section. */
1099 if (bfd_link_relocatable (link_info)
1100 || (sec->flags & SEC_RELOC) == 0
1101 || sec->reloc_count == 0
1102 || (sec->flags & SEC_CODE) == 0)
1103 return TRUE;
1105 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1107 internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL,
1108 link_info->keep_memory);
1109 if (internal_relocs == NULL)
1110 goto error_return;
1112 /* Get section contents cached copy if it exists. */
1113 if (contents == NULL)
1115 /* Get cached copy if it exists. */
1116 if (elf_section_data (sec)->this_hdr.contents != NULL)
1117 contents = elf_section_data (sec)->this_hdr.contents;
1118 else
1120 /* Go get them off disk. */
1121 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1122 goto error_return;
1126 /* Read this BFD's symbols cached copy if it exists. */
1127 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
1129 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1130 if (isymbuf == NULL)
1131 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
1132 symtab_hdr->sh_info, 0,
1133 NULL, NULL, NULL);
1134 if (isymbuf == NULL)
1135 goto error_return;
1138 misc.symtab_hdr = symtab_hdr;
1139 misc.isymbuf = isymbuf;
1140 misc.irelbase = internal_relocs;
1141 misc.contents = contents;
1143 /* This is where all the relaxation actually get done. */
1144 if ((pass == 1) || (new_pass && !changed))
1146 /* On the first pass we simply search for the lowest page that
1147 we havn't relaxed yet. Note that the pass count is reset
1148 each time a page is complete in order to move on to the next page.
1149 If we can't find any more pages then we are finished. */
1150 if (new_pass)
1152 pass = 1;
1153 new_pass = FALSE;
1154 changed = TRUE; /* Pre-initialize to break out of pass 1. */
1155 search_addr = 0xFFFFFFFF;
1158 if ((BASEADDR (sec) + sec->size < search_addr)
1159 && (BASEADDR (sec) + sec->size > page_end))
1161 if (BASEADDR (sec) <= page_end)
1162 search_addr = page_end + 1;
1163 else
1164 search_addr = BASEADDR (sec);
1166 /* Found a page => more work to do. */
1167 *again = TRUE;
1170 else
1172 if (new_pass)
1174 new_pass = FALSE;
1175 changed = FALSE;
1176 page_start = PAGENO (search_addr);
1177 page_end = page_start | 0x00003FFF;
1180 /* Only process sections in range. */
1181 if ((BASEADDR (sec) + sec->size >= page_start)
1182 && (BASEADDR (sec) <= page_end))
1184 if (!ip2k_elf_relax_section_page (abfd, sec, &changed, &misc, page_start, page_end))
1185 return FALSE;
1187 *again = TRUE;
1190 /* Perform some house keeping after relaxing the section. */
1192 if (isymbuf != NULL
1193 && symtab_hdr->contents != (unsigned char *) isymbuf)
1195 if (! link_info->keep_memory)
1196 free (isymbuf);
1197 else
1198 symtab_hdr->contents = (unsigned char *) isymbuf;
1201 if (contents != NULL
1202 && elf_section_data (sec)->this_hdr.contents != contents)
1204 if (! link_info->keep_memory)
1205 free (contents);
1206 else
1208 /* Cache the section contents for elf_link_input_bfd. */
1209 elf_section_data (sec)->this_hdr.contents = contents;
1213 if (internal_relocs != NULL
1214 && elf_section_data (sec)->relocs != internal_relocs)
1215 free (internal_relocs);
1217 return TRUE;
1219 error_return:
1220 if (isymbuf != NULL
1221 && symtab_hdr->contents != (unsigned char *) isymbuf)
1222 free (isymbuf);
1223 if (contents != NULL
1224 && elf_section_data (sec)->this_hdr.contents != contents)
1225 free (contents);
1226 if (internal_relocs != NULL
1227 && elf_section_data (sec)->relocs != internal_relocs)
1228 free (internal_relocs);
1229 return FALSE;
1232 /* Set the howto pointer for a IP2K ELF reloc. */
1234 static bfd_boolean
1235 ip2k_info_to_howto_rela (bfd * abfd,
1236 arelent * cache_ptr,
1237 Elf_Internal_Rela * dst)
1239 unsigned int r_type;
1241 r_type = ELF32_R_TYPE (dst->r_info);
1242 if (r_type >= (unsigned int) R_IP2K_max)
1244 /* xgettext:c-format */
1245 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
1246 abfd, r_type);
1247 bfd_set_error (bfd_error_bad_value);
1248 return FALSE;
1250 cache_ptr->howto = & ip2k_elf_howto_table [r_type];
1251 return TRUE;
1254 /* Perform a single relocation.
1255 By default we use the standard BFD routines. */
1257 static bfd_reloc_status_type
1258 ip2k_final_link_relocate (reloc_howto_type * howto,
1259 bfd * input_bfd,
1260 asection * input_section,
1261 bfd_byte * contents,
1262 Elf_Internal_Rela * rel,
1263 bfd_vma relocation)
1265 static bfd_vma page_addr = 0;
1267 bfd_reloc_status_type r = bfd_reloc_ok;
1268 switch (howto->type)
1270 /* Handle data space relocations. */
1271 case R_IP2K_FR9:
1272 case R_IP2K_BANK:
1273 if ((relocation & IP2K_DATA_MASK) == IP2K_DATA_VALUE)
1274 relocation &= ~IP2K_DATA_MASK;
1275 else
1276 r = bfd_reloc_notsupported;
1277 break;
1279 case R_IP2K_LO8DATA:
1280 case R_IP2K_HI8DATA:
1281 case R_IP2K_EX8DATA:
1282 break;
1284 /* Handle insn space relocations. */
1285 case R_IP2K_PAGE3:
1286 page_addr = BASEADDR (input_section) + rel->r_offset;
1287 if ((relocation & IP2K_INSN_MASK) == IP2K_INSN_VALUE)
1288 relocation &= ~IP2K_INSN_MASK;
1289 else
1290 r = bfd_reloc_notsupported;
1291 break;
1293 case R_IP2K_ADDR16CJP:
1294 if (BASEADDR (input_section) + rel->r_offset != page_addr + 2)
1296 /* No preceding page instruction, verify that it isn't needed. */
1297 if (PAGENO (relocation + rel->r_addend) !=
1298 ip2k_nominal_page_bits (input_bfd, input_section,
1299 rel->r_offset, contents))
1300 /* xgettext:c-format */
1301 _bfd_error_handler
1302 (_("ip2k linker: missing page instruction "
1303 "at %#" PRIx64 " (dest = %#" PRIx64 ")"),
1304 (uint64_t) (BASEADDR (input_section) + rel->r_offset),
1305 (uint64_t) (relocation + rel->r_addend));
1307 else if (ip2k_relaxed)
1309 /* Preceding page instruction. Verify that the page instruction is
1310 really needed. One reason for the relaxation to miss a page is if
1311 the section is not marked as executable. */
1312 if (!ip2k_is_switch_table_128 (input_bfd, input_section,
1313 rel->r_offset - 2, contents)
1314 && !ip2k_is_switch_table_256 (input_bfd, input_section,
1315 rel->r_offset - 2, contents)
1316 && (PAGENO (relocation + rel->r_addend) ==
1317 ip2k_nominal_page_bits (input_bfd, input_section,
1318 rel->r_offset - 2, contents)))
1319 /* xgettext:c-format */
1320 _bfd_error_handler
1321 (_("ip2k linker: redundant page instruction "
1322 "at %#" PRIx64 " (dest = %#" PRIx64 ")"),
1323 (uint64_t) page_addr,
1324 (uint64_t) (relocation + rel->r_addend));
1326 if ((relocation & IP2K_INSN_MASK) == IP2K_INSN_VALUE)
1327 relocation &= ~IP2K_INSN_MASK;
1328 else
1329 r = bfd_reloc_notsupported;
1330 break;
1332 case R_IP2K_LO8INSN:
1333 case R_IP2K_HI8INSN:
1334 case R_IP2K_PC_SKIP:
1335 if ((relocation & IP2K_INSN_MASK) == IP2K_INSN_VALUE)
1336 relocation &= ~IP2K_INSN_MASK;
1337 else
1338 r = bfd_reloc_notsupported;
1339 break;
1341 case R_IP2K_16:
1342 /* If this is a relocation involving a TEXT
1343 symbol, reduce it to a word address. */
1344 if ((relocation & IP2K_INSN_MASK) == IP2K_INSN_VALUE)
1345 howto = &ip2k_elf_howto_table[ (int) R_IP2K_TEXT];
1346 break;
1348 /* Pass others through. */
1349 default:
1350 break;
1353 /* Only install relocation if above tests did not disqualify it. */
1354 if (r == bfd_reloc_ok)
1355 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1356 contents, rel->r_offset,
1357 relocation, rel->r_addend);
1359 return r;
1362 /* Relocate a IP2K ELF section.
1364 The RELOCATE_SECTION function is called by the new ELF backend linker
1365 to handle the relocations for a section.
1367 The relocs are always passed as Rela structures; if the section
1368 actually uses Rel structures, the r_addend field will always be
1369 zero.
1371 This function is responsible for adjusting the section contents as
1372 necessary, and (if using Rela relocs and generating a relocatable
1373 output file) adjusting the reloc addend as necessary.
1375 This function does not have to worry about setting the reloc
1376 address or the reloc symbol index.
1378 LOCAL_SYMS is a pointer to the swapped in local symbols.
1380 LOCAL_SECTIONS is an array giving the section in the input file
1381 corresponding to the st_shndx field of each local symbol.
1383 The global hash table entry for the global symbols can be found
1384 via elf_sym_hashes (input_bfd).
1386 When generating relocatable output, this function must handle
1387 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1388 going to be the section symbol corresponding to the output
1389 section, which means that the addend must be adjusted
1390 accordingly. */
1392 static bfd_boolean
1393 ip2k_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
1394 struct bfd_link_info *info,
1395 bfd *input_bfd,
1396 asection *input_section,
1397 bfd_byte *contents,
1398 Elf_Internal_Rela *relocs,
1399 Elf_Internal_Sym *local_syms,
1400 asection **local_sections)
1402 Elf_Internal_Shdr *symtab_hdr;
1403 struct elf_link_hash_entry **sym_hashes;
1404 Elf_Internal_Rela *rel;
1405 Elf_Internal_Rela *relend;
1407 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1408 sym_hashes = elf_sym_hashes (input_bfd);
1409 relend = relocs + input_section->reloc_count;
1411 for (rel = relocs; rel < relend; rel ++)
1413 reloc_howto_type * howto;
1414 unsigned long r_symndx;
1415 Elf_Internal_Sym * sym;
1416 asection * sec;
1417 struct elf_link_hash_entry * h;
1418 bfd_vma relocation;
1419 bfd_reloc_status_type r;
1420 const char * name = NULL;
1421 int r_type;
1423 r_type = ELF32_R_TYPE (rel->r_info);
1424 r_symndx = ELF32_R_SYM (rel->r_info);
1425 howto = ip2k_elf_howto_table + r_type;
1426 h = NULL;
1427 sym = NULL;
1428 sec = NULL;
1430 if (r_symndx < symtab_hdr->sh_info)
1432 sym = local_syms + r_symndx;
1433 sec = local_sections [r_symndx];
1434 relocation = BASEADDR (sec) + sym->st_value;
1436 name = bfd_elf_string_from_elf_section
1437 (input_bfd, symtab_hdr->sh_link, sym->st_name);
1438 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
1440 else
1442 bfd_boolean warned, ignored;
1443 bfd_boolean unresolved_reloc;
1445 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1446 r_symndx, symtab_hdr, sym_hashes,
1447 h, sec, relocation,
1448 unresolved_reloc, warned, ignored);
1450 name = h->root.root.string;
1453 if (sec != NULL && discarded_section (sec))
1454 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1455 rel, 1, relend, howto, 0, contents);
1457 if (bfd_link_relocatable (info))
1458 continue;
1460 /* Finally, the sole IP2K-specific part. */
1461 r = ip2k_final_link_relocate (howto, input_bfd, input_section,
1462 contents, rel, relocation);
1464 if (r != bfd_reloc_ok)
1466 const char * msg = NULL;
1468 switch (r)
1470 case bfd_reloc_overflow:
1471 (*info->callbacks->reloc_overflow)
1472 (info, (h ? &h->root : NULL), name, howto->name,
1473 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1474 break;
1476 case bfd_reloc_undefined:
1477 (*info->callbacks->undefined_symbol)
1478 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
1479 break;
1481 case bfd_reloc_outofrange:
1482 msg = _("internal error: out of range error");
1483 break;
1485 /* This is how ip2k_final_link_relocate tells us of a non-kosher
1486 reference between insn & data address spaces. */
1487 case bfd_reloc_notsupported:
1488 if (sym != NULL) /* Only if it's not an unresolved symbol. */
1489 msg = _("unsupported relocation between data/insn address spaces");
1490 break;
1492 case bfd_reloc_dangerous:
1493 msg = _("internal error: dangerous relocation");
1494 break;
1496 default:
1497 msg = _("internal error: unknown error");
1498 break;
1501 if (msg)
1502 (*info->callbacks->warning) (info, msg, name, input_bfd,
1503 input_section, rel->r_offset);
1507 return TRUE;
1510 #define TARGET_BIG_SYM ip2k_elf32_vec
1511 #define TARGET_BIG_NAME "elf32-ip2k"
1513 #define ELF_ARCH bfd_arch_ip2k
1514 #define ELF_MACHINE_CODE EM_IP2K
1515 #define ELF_MACHINE_ALT1 EM_IP2K_OLD
1516 #define ELF_MAXPAGESIZE 1 /* No pages on the IP2K. */
1518 #define elf_info_to_howto_rel NULL
1519 #define elf_info_to_howto ip2k_info_to_howto_rela
1521 #define elf_backend_can_gc_sections 1
1522 #define elf_backend_rela_normal 1
1523 #define elf_backend_relocate_section ip2k_elf_relocate_section
1525 #define elf_symbol_leading_char '_'
1526 #define bfd_elf32_bfd_reloc_type_lookup ip2k_reloc_type_lookup
1527 #define bfd_elf32_bfd_reloc_name_lookup ip2k_reloc_name_lookup
1528 #define bfd_elf32_bfd_relax_section ip2k_elf_relax_section
1530 #include "elf32-target.h"