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 */
584 2, /* minimum section alignment */
586 bfd_getb64
, bfd_getb_signed_64
, bfd_putb64
,
587 bfd_getb32
, bfd_getb_signed_32
, bfd_putb32
,
588 bfd_getb16
, bfd_getb_signed_16
, bfd_putb16
,
590 bfd_getb64
, bfd_getb_signed_64
, bfd_putb64
,
591 bfd_getb32
, bfd_getb_signed_32
, bfd_putb32
,
592 bfd_getb16
, bfd_getb_signed_16
, bfd_putb16
,
598 bfd_generic_archive_p
,
604 _bfd_generic_mkarchive
,
609 coff_write_object_contents
,
610 _bfd_write_archive_contents
,
614 BFD_JUMP_TABLE_GENERIC (coff
),
615 BFD_JUMP_TABLE_COPY (coff
),
616 BFD_JUMP_TABLE_CORE (_bfd_nocore
),
617 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff
),
618 BFD_JUMP_TABLE_SYMBOLS (coff
),
619 BFD_JUMP_TABLE_RELOCS (coff
),
620 BFD_JUMP_TABLE_WRITE (coff
),
621 BFD_JUMP_TABLE_LINK (coff
),
622 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic
),