1 /* AMD 29000 COFF back-end for BFD.
2 Copyright (C) 1990-1991 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
29 #include "coff-a29k.h"
30 #include "internalcoff.h"
33 #define INSERT_HWORD(WORD,HWORD) \
34 (((WORD) & 0xff00ff00) | (((HWORD) & 0xff00) << 8) | ((HWORD)& 0xff))
35 #define EXTRACT_HWORD(WORD) \
36 (((WORD) & 0x00ff0000) >> 8) | ((WORD)& 0xff)
37 #define SIGN_EXTEND_HWORD(HWORD) \
38 ((HWORD) & 0x8000 ? (HWORD)|0xffff0000 : (HWORD))
40 /* Provided the symbol, returns the value reffed */
42 get_symbol_value(symbol
)
47 if (symbol
!= (asymbol
*)NULL
) {
48 if (symbol
->flags
& BSF_FORT_COMM
) {
51 relocation
= symbol
->value
;
53 if (symbol
->section
!= (asection
*)NULL
) {
54 relocation
+= symbol
->section
->output_section
->vma
+
55 symbol
->section
->output_offset
;
61 /* this function is in charge of performing all the 29k relocations */
63 static bfd_reloc_status_type
64 DEFUN(a29k_reloc
,(abfd
, reloc_entry
, symbol_in
, data
, input_section
),
66 arelent
*reloc_entry AND
67 asymbol
*symbol_in AND
68 unsigned char *data AND
69 asection
*input_section
)
71 /* the consth relocation comes in two parts, we have to remember
72 the state between calls, in these variables */
73 static boolean part1_consth_active
= false;
74 static unsigned long part1_consth_value
;
77 unsigned long sym_value
;
78 unsigned long unsigned_value
;
79 unsigned short r_type
;
83 r_type
= reloc_entry
->howto
->type
;
85 /* FIXME: Do we need to check for partial linking here */
86 if (symbol_in
&& (symbol_in
->flags
& BSF_UNDEFINED
))
88 /* Keep the state machine happy in case we're called again */
89 if (r_type
== R_IHIHALF
)
91 part1_consth_active
= true;
92 part1_consth_value
= 0;
94 return(bfd_reloc_undefined
);
97 if ((part1_consth_active
) && (r_type
!= R_IHCONST
))
99 fprintf(stderr
,"Relocation problem : ");
100 fprintf(stderr
,"Missing IHCONST in module %s\n",abfd
->filename
);
101 part1_consth_active
= false;
102 return(bfd_reloc_dangerous
);
105 insn
= bfd_get_32(abfd
, data
+ reloc_entry
->address
);
106 sym_value
= get_symbol_value(symbol_in
);
111 /* Take the value in the field and sign extend it */
112 signed_value
= EXTRACT_HWORD(insn
) << 2;
113 signed_value
= SIGN_EXTEND_HWORD(signed_value
);
114 signed_value
+= sym_value
+ reloc_entry
->addend
;
115 if ((signed_value
&~0x3ffff) == 0)
116 { /* Absolute jmp/call */
117 insn
|= (1<<24); /* Make it absolute */
118 /* FIXME: Should we change r_type to R_IABS */
123 /* Relative jmp/call, so subtract from the value the
124 address of the place we're coming from */
125 signed_value
-= reloc_entry
->address
+
126 input_section
->output_section
->vma
+
127 input_section
->output_offset
;
128 if (signed_value
>0x1ffff || signed_value
<-0x20000)
129 return(bfd_reloc_outofrange
);
133 insn
= INSERT_HWORD(insn
, signed_value
);
136 unsigned_value
= EXTRACT_HWORD(insn
);
137 unsigned_value
+= sym_value
+ reloc_entry
->addend
;
138 insn
= INSERT_HWORD(insn
, unsigned_value
);
142 Just get the symbol value that is referenced */
143 part1_consth_active
= true;
144 part1_consth_value
= sym_value
+ reloc_entry
->addend
;
145 /* Don't modify insn until R_IHCONST */
146 return(bfd_reloc_ok
);
150 Now relocate the reference */
151 if (part1_consth_active
== false) {
152 fprintf(stderr
,"Relocation problem : ");
153 fprintf(stderr
,"IHIHALF missing in module %s\n",
155 return(bfd_reloc_dangerous
);
157 /* sym_ptr_ptr = r_symndx, in coff_slurp_reloc_table() */
158 unsigned_value
= 0; /*EXTRACT_HWORD(insn) << 16;*/
159 unsigned_value
+= reloc_entry
->addend
; /* r_symndx */
160 unsigned_value
+= part1_consth_value
;
161 unsigned_value
= unsigned_value
>> 16;
162 insn
= INSERT_HWORD(insn
, unsigned_value
);
163 part1_consth_active
= false;
166 unsigned_value
= (insn
>> 24) + sym_value
+ reloc_entry
->addend
;
167 if (unsigned_value
& 0xffffff00) {
168 fprintf(stderr
,"Relocation problem : ");
169 fprintf(stderr
,"byte value too large in module %s\n",
171 return(bfd_reloc_overflow
);
173 insn
= (insn
& 0x00ffffff) | (unsigned_value
<< 24);
176 unsigned_value
= (insn
>> 16) + sym_value
+ reloc_entry
->addend
;
177 if (unsigned_value
& 0xffff0000) {
178 fprintf(stderr
,"Relocation problem : ");
179 fprintf(stderr
,"hword value too large in module %s\n",
181 return(bfd_reloc_overflow
);
183 insn
= (insn
& 0x0000ffff) | (unsigned_value
<<16);
186 insn
+= sym_value
+ reloc_entry
->addend
;
189 fprintf(stderr
,"Relocation problem : ");
190 fprintf(stderr
,"Unrecognized reloc type %d, in module %s\n",
191 r_type
,abfd
->filename
);
192 return (bfd_reloc_dangerous
);
195 bfd_put_32(abfd
, insn
, data
+reloc_entry
->address
);
196 return(bfd_reloc_ok
);
212 /*FIXME: I'm not real sure about this table */
213 #define NA 0 /* Obsolete fields, via the documentation */
214 static reloc_howto_type howto_table
[] =
216 {R_ABS
, 0, 3, NA
, false, NA
, NA
, true,a29k_reloc
,"ABS", true, 0xffffffff,0xffffffff, false},
217 {1}, {2}, {3}, {4}, {5}, {6}, {7}, {8}, {9}, {10},
218 {11}, {12}, {13}, {14}, {15}, {16}, {17}, {18}, {19}, {20},
220 {R_IREL
, 0, 3, NA
, true, NA
, NA
, true,a29k_reloc
,"IREL", true, 0xffffffff,0xffffffff, false},
221 {R_IABS
, 0, 3, NA
, false, NA
, NA
, true,a29k_reloc
,"IABS", true, 0xffffffff,0xffffffff, false},
222 {R_ILOHALF
, 0, 3, NA
, true, NA
, NA
, true,a29k_reloc
,"ILOHALF", true, 0x0000ffff,0x0000ffff, false},
223 {R_IHIHALF
, 0, 3, NA
, true, NA
, NA
, true,a29k_reloc
,"IHIHALF", true, 0xffff0000,0xffff0000, false},
224 {R_IHCONST
, 0, 3, NA
, true, NA
, NA
, true,a29k_reloc
,"IHCONST", true, 0xffff0000,0xffff0000, false},
225 {R_BYTE
, 0, 0, NA
, false, NA
, NA
, true,a29k_reloc
,"BYTE", true, 0x000000ff,0x000000ff, false},
226 {R_HWORD
, 0, 1, NA
, false, NA
, NA
, true,a29k_reloc
,"HWORD", true, 0x0000ffff,0x0000ffff, false},
227 {R_WORD
, 0, 2, NA
, false, NA
, NA
, true,a29k_reloc
,"WORD", true, 0xffffffff,0xffffffff, false},
231 #define BADMAG(x) A29KBADMAG(x)
233 /* This macro translates an external r_type field into a pointer to an
234 entry in the above table */
237 #define RTYPE2HOWTO(cache_ptr, dst) \
238 if (dst.r_type == R_IHCONST) { \
239 /* Add in the value which was stored in the symbol index */\
240 cache_ptr->addend += dst.r_symndx; \
241 /* Throw away the bogus symbol pointer */ \
242 cache_ptr->sym_ptr_ptr = 0; \
244 cache_ptr->howto = howto_table + dst.r_type; \
246 #include "coffcode.h"
248 bfd_target a29kcoff_big_vec
=
250 "coff-a29k-big", /* name */
251 bfd_target_coff_flavour
,
252 true, /* data byte order is big */
253 true, /* header byte order is big */
255 (HAS_RELOC
| EXEC_P
| /* object flags */
256 HAS_LINENO
| HAS_DEBUG
|
257 HAS_SYMS
| HAS_LOCALS
| DYNAMIC
| WP_TEXT
),
259 (SEC_HAS_CONTENTS
| SEC_ALLOC
/* section flags */
260 | SEC_LOAD
| SEC_RELOC
262 '/', /* ar_pad_char */
263 15, /* ar_max_namelen */
264 2, /* minimum section alignment */
266 _do_getb64
, _do_putb64
, _do_getb32
,
267 _do_putb32
, _do_getb16
, _do_putb16
,
269 _do_getb64
, _do_putb64
, _do_getb32
,
270 _do_putb32
, _do_getb16
, _do_putb16
,
276 bfd_generic_archive_p
,
282 _bfd_generic_mkarchive
,
287 coff_write_object_contents
,
288 _bfd_write_archive_contents
,