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,