1 /* BFD back-end for AMD 29000 COFF binaries.
2 Copyright 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
3 Contributed by David Wood at New York University 7/8/91.
5 This file is part of BFD, the Binary File Descriptor library.
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 2 of the License, or
10 (at your option) any later version.
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.
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. */
27 #include "coff/a29k.h"
28 #include "coff/internal.h"
31 static long get_symbol_value PARAMS ((asymbol *));
32 static bfd_reloc_status_type a29k_reloc
33 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
34 static boolean coff_a29k_relocate_section
35 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
36 struct internal_reloc *, struct internal_syment *, asection **));
37 static boolean coff_a29k_adjust_symndx
38 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *,
39 struct internal_reloc *, boolean *));
41 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)
43 #define INSERT_HWORD(WORD,HWORD) \
44 (((WORD) & 0xff00ff00) | (((HWORD) & 0xff00) << 8) | ((HWORD)& 0xff))
45 #define EXTRACT_HWORD(WORD) \
46 ((((WORD) & 0x00ff0000) >> 8) | ((WORD)& 0xff))
47 #define SIGN_EXTEND_HWORD(HWORD) \
48 ((HWORD) & 0x8000 ? (HWORD)|0xffff0000 : (HWORD))
50 /* Provided the symbol, returns the value reffed */
52 get_symbol_value (symbol)
57 if (bfd_is_com_section (symbol->section))
63 relocation = symbol->value +
64 symbol->section->output_section->vma +
65 symbol->section->output_offset;
71 /* this function is in charge of performing all the 29k relocations */
73 static bfd_reloc_status_type
74 a29k_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd,
80 asection *input_section;
84 /* the consth relocation comes in two parts, we have to remember
85 the state between calls, in these variables */
86 static boolean part1_consth_active = false;
87 static unsigned long part1_consth_value;
90 unsigned long sym_value;
91 unsigned long unsigned_value;
92 unsigned short r_type;
95 unsigned long addr = reloc_entry->address ; /*+ input_section->vma*/
96 bfd_byte *hit_data =addr + (bfd_byte *)(data);
98 r_type = reloc_entry->howto->type;
101 /* Partial linking - do nothing */
102 reloc_entry->address += input_section->output_offset;
107 if (symbol_in != NULL
108 && bfd_is_und_section (symbol_in->section))
110 /* Keep the state machine happy in case we're called again */
111 if (r_type == R_IHIHALF)
113 part1_consth_active = true;
114 part1_consth_value = 0;
116 return(bfd_reloc_undefined);
119 if ((part1_consth_active) && (r_type != R_IHCONST))
121 part1_consth_active = false;
122 *error_message = (char *) "Missing IHCONST";
123 return(bfd_reloc_dangerous);
127 sym_value = get_symbol_value(symbol_in);
132 insn = bfd_get_32(abfd, hit_data);
133 /* Take the value in the field and sign extend it */
134 signed_value = EXTRACT_HWORD(insn);
135 signed_value = SIGN_EXTEND_HWORD(signed_value);
137 signed_value += sym_value + reloc_entry->addend;
138 if (((signed_value + reloc_entry->address) & ~0x3ffff) == 0)
139 { /* Absolute jmp/call */
140 insn |= (1<<24); /* Make it absolute */
141 signed_value += reloc_entry->address;
142 /* FIXME: Should we change r_type to R_IABS */
146 /* Relative jmp/call, so subtract from the value the
147 address of the place we're coming from */
148 signed_value -= (input_section->output_section->vma
149 + input_section->output_offset);
150 if (signed_value>0x1ffff || signed_value<-0x20000)
151 return(bfd_reloc_overflow);
154 insn = INSERT_HWORD(insn, signed_value);
155 bfd_put_32(abfd, insn ,hit_data);
158 insn = bfd_get_32(abfd, hit_data);
159 unsigned_value = EXTRACT_HWORD(insn);
160 unsigned_value += sym_value + reloc_entry->addend;
161 insn = INSERT_HWORD(insn, unsigned_value);
162 bfd_put_32(abfd, insn, hit_data);
165 insn = bfd_get_32(abfd, hit_data);
167 Just get the symbol value that is referenced */
168 part1_consth_active = true;
169 part1_consth_value = sym_value + reloc_entry->addend;
170 /* Don't modify insn until R_IHCONST */
173 insn = bfd_get_32(abfd, hit_data);
175 Now relocate the reference */
176 if (part1_consth_active == false) {
177 *error_message = (char *) "Missing IHIHALF";
178 return(bfd_reloc_dangerous);
180 /* sym_ptr_ptr = r_symndx, in coff_slurp_reloc_table() */
181 unsigned_value = 0; /*EXTRACT_HWORD(insn) << 16;*/
182 unsigned_value += reloc_entry->addend; /* r_symndx */
183 unsigned_value += part1_consth_value;
184 unsigned_value = unsigned_value >> 16;
185 insn = INSERT_HWORD(insn, unsigned_value);
186 part1_consth_active = false;
187 bfd_put_32(abfd, insn, hit_data);
190 insn = bfd_get_8(abfd, hit_data);
191 unsigned_value = insn + sym_value + reloc_entry->addend;
192 if (unsigned_value & 0xffffff00) {
193 fprintf(stderr,"Relocation problem : ");
194 fprintf(stderr,"byte value too large in module %s\n",
196 return(bfd_reloc_overflow);
198 bfd_put_8(abfd, unsigned_value, hit_data);
201 insn = bfd_get_16(abfd, hit_data);
202 unsigned_value = insn + sym_value + reloc_entry->addend;
203 if (unsigned_value & 0xffff0000) {
204 fprintf(stderr,"Relocation problem : ");
205 fprintf(stderr,"hword value too large in module %s\n",
207 return(bfd_reloc_overflow);
210 bfd_put_16(abfd, insn, hit_data);
213 insn = bfd_get_32(abfd, hit_data);
214 insn += sym_value + reloc_entry->addend;
215 bfd_put_32(abfd, insn, hit_data);
218 *error_message = "Unrecognized reloc";
219 return (bfd_reloc_dangerous);
223 return(bfd_reloc_ok);
239 /*FIXME: I'm not real sure about this table */
240 static reloc_howto_type howto_table[] =
242 {R_ABS, 0, 3, 32, false, 0, complain_overflow_bitfield,a29k_reloc,"ABS", true, 0xffffffff,0xffffffff, false},
243 {1}, {2}, {3}, {4}, {5}, {6}, {7}, {8}, {9}, {10},
244 {11}, {12}, {13}, {14}, {15}, {16}, {17}, {18}, {19}, {20},
246 {R_IREL, 0, 3, 32, true, 0, complain_overflow_signed,a29k_reloc,"IREL", true, 0xffffffff,0xffffffff, false},
247 {R_IABS, 0, 3, 32, false, 0, complain_overflow_bitfield, a29k_reloc,"IABS", true, 0xffffffff,0xffffffff, false},
248 {R_ILOHALF, 0, 3, 16, true, 0, complain_overflow_signed, a29k_reloc,"ILOHALF", true, 0x0000ffff,0x0000ffff, false},
249 {R_IHIHALF, 0, 3, 16, true, 16, complain_overflow_signed, a29k_reloc,"IHIHALF", true, 0xffff0000,0xffff0000, false},
250 {R_IHCONST, 0, 3, 16, true, 0, complain_overflow_signed, a29k_reloc,"IHCONST", true, 0xffff0000,0xffff0000, false},
251 {R_BYTE, 0, 0, 8, false, 0, complain_overflow_bitfield, a29k_reloc,"BYTE", true, 0x000000ff,0x000000ff, false},
252 {R_HWORD, 0, 1, 16, false, 0, complain_overflow_bitfield, a29k_reloc,"HWORD", true, 0x0000ffff,0x0000ffff, false},
253 {R_WORD, 0, 2, 32, false, 0, complain_overflow_bitfield, a29k_reloc,"WORD", true, 0xffffffff,0xffffffff, false},
256 #define BADMAG(x) A29KBADMAG(x)
258 #define RELOC_PROCESSING(relent, reloc, symbols, abfd, section) \
259 reloc_processing(relent, reloc, symbols, abfd, section)
262 reloc_processing (relent,reloc, symbols, abfd, section)
264 struct internal_reloc *reloc;
269 static bfd_vma ihihalf_vaddr = (bfd_vma) -1;
271 relent->address = reloc->r_vaddr;
272 relent->howto = howto_table + reloc->r_type;
273 if (reloc->r_type == R_IHCONST)
275 /* The address of an R_IHCONST should always be the address of
276 the immediately preceding R_IHIHALF. relocs generated by gas
277 are correct, but relocs generated by High C are different (I
278 can't figure out what the address means for High C). We can
279 handle both gas and High C by ignoring the address here, and
280 simply reusing the address saved for R_IHIHALF. */
281 if (ihihalf_vaddr == (bfd_vma) -1)
283 relent->address = ihihalf_vaddr;
284 ihihalf_vaddr = (bfd_vma) -1;
285 relent->addend = reloc->r_symndx;
286 relent->sym_ptr_ptr= bfd_abs_section_ptr->symbol_ptr_ptr;
291 relent->sym_ptr_ptr = symbols + obj_convert(abfd)[reloc->r_symndx];
293 ptr = *(relent->sym_ptr_ptr);
296 && bfd_asymbol_bfd(ptr) == abfd
298 && ((ptr->flags & BSF_OLD_COMMON)== 0))
306 relent->address-= section->vma;
307 if (reloc->r_type == R_IHIHALF)
308 ihihalf_vaddr = relent->address;
309 else if (ihihalf_vaddr != (bfd_vma) -1)
314 /* The reloc processing routine for the optimized COFF linker. */
317 coff_a29k_relocate_section (output_bfd, info, input_bfd, input_section,
318 contents, relocs, syms, sections)
320 struct bfd_link_info *info;
322 asection *input_section;
324 struct internal_reloc *relocs;
325 struct internal_syment *syms;
328 struct internal_reloc *rel;
329 struct internal_reloc *relend;
333 /* If we are performing a relocateable link, we don't need to do a
334 thing. The caller will take care of adjusting the reloc
335 addresses and symbol indices. */
336 if (info->relocateable)
343 relend = rel + input_section->reloc_count;
344 for (; rel < relend; rel++)
348 struct coff_link_hash_entry *h;
349 struct internal_syment *sym;
355 unsigned long unsigned_value;
356 bfd_reloc_status_type rstat;
358 symndx = rel->r_symndx;
359 loc = contents + rel->r_vaddr - input_section->vma;
364 h = obj_coff_sym_hashes (input_bfd)[symndx];
370 /* An R_IHCONST reloc does not have a symbol. Instead, the
371 symbol index is an addend. R_IHCONST is always used in
372 conjunction with R_IHHALF. */
373 if (rel->r_type != R_IHCONST)
378 sec = bfd_abs_section_ptr;
382 sec = sections[symndx];
383 val = (sec->output_section->vma
391 if (h->root.type == bfd_link_hash_defined
392 || h->root.type == bfd_link_hash_defweak)
394 sec = h->root.u.def.section;
395 val = (h->root.u.def.value
396 + sec->output_section->vma
397 + sec->output_offset);
401 if (! ((*info->callbacks->undefined_symbol)
402 (info, h->root.root.string, input_bfd, input_section,
403 rel->r_vaddr - input_section->vma)))
410 if (! ((*info->callbacks->reloc_dangerous)
411 (info, "missing IHCONST reloc", input_bfd,
412 input_section, rel->r_vaddr - input_section->vma)))
423 bfd_set_error (bfd_error_bad_value);
427 insn = bfd_get_32 (input_bfd, loc);
429 /* Extract the addend. */
430 signed_value = EXTRACT_HWORD (insn);
431 signed_value = SIGN_EXTEND_HWORD (signed_value);
434 /* Determine the destination of the jump. */
435 signed_value += val + rel->r_vaddr - input_section->vma;
437 if ((signed_value & ~0x3ffff) == 0)
439 /* We can use an absolute jump. */
444 /* Make the destination PC relative. */
445 signed_value -= (input_section->output_section->vma
446 + input_section->output_offset
447 + (rel->r_vaddr - input_section->vma));
448 if (signed_value > 0x1ffff || signed_value < - 0x20000)
455 /* Put the adjusted value back into the instruction. */
457 insn = INSERT_HWORD (insn, signed_value);
459 bfd_put_32 (input_bfd, (bfd_vma) insn, loc);
464 insn = bfd_get_32 (input_bfd, loc);
465 unsigned_value = EXTRACT_HWORD (insn);
466 unsigned_value += val;
467 insn = INSERT_HWORD (insn, unsigned_value);
468 bfd_put_32 (input_bfd, insn, loc);
472 /* Save the value for the R_IHCONST reloc. */
480 if (! ((*info->callbacks->reloc_dangerous)
481 (info, "missing IHIHALF reloc", input_bfd,
482 input_section, rel->r_vaddr - input_section->vma)))
487 insn = bfd_get_32 (input_bfd, loc);
488 unsigned_value = rel->r_symndx + hihalf_val;
489 unsigned_value >>= 16;
490 insn = INSERT_HWORD (insn, unsigned_value);
491 bfd_put_32 (input_bfd, (bfd_vma) insn, loc);
500 rstat = _bfd_relocate_contents (howto_table + rel->r_type,
501 input_bfd, val, loc);
502 if (rstat == bfd_reloc_overflow)
504 else if (rstat != bfd_reloc_ok)
512 char buf[SYMNMLEN + 1];
517 name = h->root.root.string;
518 else if (sym == NULL)
520 else if (sym->_n._n_n._n_zeroes == 0
521 && sym->_n._n_n._n_offset != 0)
522 name = obj_coff_strings (input_bfd) + sym->_n._n_n._n_offset;
525 strncpy (buf, sym->_n._n_name, SYMNMLEN);
526 buf[SYMNMLEN] = '\0';
530 if (! ((*info->callbacks->reloc_overflow)
531 (info, name, howto_table[rel->r_type].name, (bfd_vma) 0,
532 input_bfd, input_section,
533 rel->r_vaddr - input_section->vma)))
541 #define coff_relocate_section coff_a29k_relocate_section
543 /* We don't want to change the symndx of a R_IHCONST reloc, since it
544 is actually an addend, not a symbol index at all. */
548 coff_a29k_adjust_symndx (obfd, info, ibfd, sec, irel, adjustedp)
550 struct bfd_link_info *info;
553 struct internal_reloc *irel;
556 if (irel->r_type == R_IHCONST)
563 #define coff_adjust_symndx coff_a29k_adjust_symndx
565 #include "coffcode.h"
567 const bfd_target a29kcoff_big_vec =
569 "coff-a29k-big", /* name */
570 bfd_target_coff_flavour,
571 true, /* data byte order is big */
572 true, /* header byte order is big */
574 (HAS_RELOC | EXEC_P | /* object flags */
575 HAS_LINENO | HAS_DEBUG |
576 HAS_SYMS | HAS_LOCALS | WP_TEXT),
578 (SEC_HAS_CONTENTS | SEC_ALLOC /* section flags */
579 | SEC_LOAD | SEC_RELOC
581 '_', /* leading underscore */
582 '/', /* ar_pad_char */
583 15, /* ar_max_namelen */
585 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
586 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
587 bfd_getb16, bfd_getb_signed_16, bfd_putb16,
589 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
590 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
591 bfd_getb16, bfd_getb_signed_16, bfd_putb16,
597 bfd_generic_archive_p,
603 _bfd_generic_mkarchive,
608 coff_write_object_contents,
609 _bfd_write_archive_contents,
613 BFD_JUMP_TABLE_GENERIC (coff),
614 BFD_JUMP_TABLE_COPY (coff),
615 BFD_JUMP_TABLE_CORE (_bfd_nocore),
616 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
617 BFD_JUMP_TABLE_SYMBOLS (coff),
618 BFD_JUMP_TABLE_RELOCS (coff),
619 BFD_JUMP_TABLE_WRITE (coff),
620 BFD_JUMP_TABLE_LINK (coff),
621 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),