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., 675 Mass Ave, Cambridge, MA 02139, 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 **));
35 #define INSERT_HWORD(WORD,HWORD) \
36 (((WORD) & 0xff00ff00) | (((HWORD) & 0xff00) << 8) | ((HWORD)& 0xff))
37 #define EXTRACT_HWORD(WORD) \
38 (((WORD) & 0x00ff0000) >> 8) | ((WORD)& 0xff)
39 #define SIGN_EXTEND_HWORD(HWORD) \
40 ((HWORD) & 0x8000 ? (HWORD)|0xffff0000 : (HWORD))
42 /* Provided the symbol, returns the value reffed */
44 get_symbol_value (symbol)
49 if (bfd_is_com_section (symbol->section))
55 relocation = symbol->value +
56 symbol->section->output_section->vma +
57 symbol->section->output_offset;
63 /* this function is in charge of performing all the 29k relocations */
65 static bfd_reloc_status_type
66 a29k_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd,
72 asection *input_section;
76 /* the consth relocation comes in two parts, we have to remember
77 the state between calls, in these variables */
78 static boolean part1_consth_active = false;
79 static unsigned long part1_consth_value;
82 unsigned long sym_value;
83 unsigned long unsigned_value;
84 unsigned short r_type;
87 unsigned long addr = reloc_entry->address ; /*+ input_section->vma*/
88 bfd_byte *hit_data =addr + (bfd_byte *)(data);
90 r_type = reloc_entry->howto->type;
93 /* Partial linking - do nothing */
94 reloc_entry->address += input_section->output_offset;
99 if (symbol_in && (symbol_in->section == &bfd_und_section))
101 /* Keep the state machine happy in case we're called again */
102 if (r_type == R_IHIHALF)
104 part1_consth_active = true;
105 part1_consth_value = 0;
107 return(bfd_reloc_undefined);
110 if ((part1_consth_active) && (r_type != R_IHCONST))
112 part1_consth_active = false;
113 *error_message = (char *) "Missing IHCONST";
114 return(bfd_reloc_dangerous);
118 sym_value = get_symbol_value(symbol_in);
123 insn = bfd_get_32(abfd, hit_data);
124 /* Take the value in the field and sign extend it */
125 signed_value = EXTRACT_HWORD(insn);
126 signed_value = SIGN_EXTEND_HWORD(signed_value);
128 signed_value += sym_value + reloc_entry->addend;
129 if (((signed_value + reloc_entry->address) & ~0x3ffff) == 0)
130 { /* Absolute jmp/call */
131 insn |= (1<<24); /* Make it absolute */
132 signed_value += reloc_entry->address;
133 /* FIXME: Should we change r_type to R_IABS */
137 /* Relative jmp/call, so subtract from the value the
138 address of the place we're coming from */
139 signed_value -= (input_section->output_section->vma
140 + input_section->output_offset);
141 if (signed_value>0x1ffff || signed_value<-0x20000)
142 return(bfd_reloc_overflow);
145 insn = INSERT_HWORD(insn, signed_value);
146 bfd_put_32(abfd, insn ,hit_data);
149 insn = bfd_get_32(abfd, hit_data);
150 unsigned_value = EXTRACT_HWORD(insn);
151 unsigned_value += sym_value + reloc_entry->addend;
152 insn = INSERT_HWORD(insn, unsigned_value);
153 bfd_put_32(abfd, insn, hit_data);
156 insn = bfd_get_32(abfd, hit_data);
158 Just get the symbol value that is referenced */
159 part1_consth_active = true;
160 part1_consth_value = sym_value + reloc_entry->addend;
161 /* Don't modify insn until R_IHCONST */
164 insn = bfd_get_32(abfd, hit_data);
166 Now relocate the reference */
167 if (part1_consth_active == false) {
168 *error_message = (char *) "Missing IHIHALF";
169 return(bfd_reloc_dangerous);
171 /* sym_ptr_ptr = r_symndx, in coff_slurp_reloc_table() */
172 unsigned_value = 0; /*EXTRACT_HWORD(insn) << 16;*/
173 unsigned_value += reloc_entry->addend; /* r_symndx */
174 unsigned_value += part1_consth_value;
175 unsigned_value = unsigned_value >> 16;
176 insn = INSERT_HWORD(insn, unsigned_value);
177 part1_consth_active = false;
178 bfd_put_32(abfd, insn, hit_data);
181 insn = bfd_get_8(abfd, hit_data);
182 unsigned_value = insn + sym_value + reloc_entry->addend;
183 if (unsigned_value & 0xffffff00) {
184 fprintf(stderr,"Relocation problem : ");
185 fprintf(stderr,"byte value too large in module %s\n",
187 return(bfd_reloc_overflow);
189 bfd_put_8(abfd, unsigned_value, hit_data);
192 insn = bfd_get_16(abfd, hit_data);
193 unsigned_value = insn + sym_value + reloc_entry->addend;
194 if (unsigned_value & 0xffff0000) {
195 fprintf(stderr,"Relocation problem : ");
196 fprintf(stderr,"hword value too large in module %s\n",
198 return(bfd_reloc_overflow);
201 bfd_put_16(abfd, insn, hit_data);
204 insn = bfd_get_32(abfd, hit_data);
205 insn += sym_value + reloc_entry->addend;
206 bfd_put_32(abfd, insn, hit_data);
209 *error_message = "Unrecognized reloc";
210 return (bfd_reloc_dangerous);
214 return(bfd_reloc_ok);
230 /*FIXME: I'm not real sure about this table */
231 static reloc_howto_type howto_table[] =
233 {R_ABS, 0, 3, 32, false, 0, complain_overflow_bitfield,a29k_reloc,"ABS", true, 0xffffffff,0xffffffff, false},
234 {1}, {2}, {3}, {4}, {5}, {6}, {7}, {8}, {9}, {10},
235 {11}, {12}, {13}, {14}, {15}, {16}, {17}, {18}, {19}, {20},
237 {R_IREL, 0, 3, 32, true, 0, complain_overflow_signed,a29k_reloc,"IREL", true, 0xffffffff,0xffffffff, false},
238 {R_IABS, 0, 3, 32, false, 0, complain_overflow_bitfield, a29k_reloc,"IABS", true, 0xffffffff,0xffffffff, false},
239 {R_ILOHALF, 0, 3, 16, true, 0, complain_overflow_signed, a29k_reloc,"ILOHALF", true, 0x0000ffff,0x0000ffff, false},
240 {R_IHIHALF, 0, 3, 16, true, 16, complain_overflow_signed, a29k_reloc,"IHIHALF", true, 0xffff0000,0xffff0000, false},
241 {R_IHCONST, 0, 3, 16, true, 0, complain_overflow_signed, a29k_reloc,"IHCONST", true, 0xffff0000,0xffff0000, false},
242 {R_BYTE, 0, 0, 8, false, 0, complain_overflow_bitfield, a29k_reloc,"BYTE", true, 0x000000ff,0x000000ff, false},
243 {R_HWORD, 0, 1, 16, false, 0, complain_overflow_bitfield, a29k_reloc,"HWORD", true, 0x0000ffff,0x0000ffff, false},
244 {R_WORD, 0, 2, 32, false, 0, complain_overflow_bitfield, a29k_reloc,"WORD", true, 0xffffffff,0xffffffff, false},
247 #define BADMAG(x) A29KBADMAG(x)
249 #define RELOC_PROCESSING(relent, reloc, symbols, abfd, section) \
250 reloc_processing(relent, reloc, symbols, abfd, section)
253 reloc_processing (relent,reloc, symbols, abfd, section)
255 struct internal_reloc *reloc;
260 static bfd_vma ihihalf_vaddr = (bfd_vma) -1;
262 relent->address = reloc->r_vaddr;
263 relent->howto = howto_table + reloc->r_type;
264 if (reloc->r_type == R_IHCONST)
266 /* The address of an R_IHCONST should always be the address of
267 the immediately preceding R_IHIHALF. relocs generated by gas
268 are correct, but relocs generated by High C are different (I
269 can't figure out what the address means for High C). We can
270 handle both gas and High C by ignoring the address here, and
271 simply reusing the address saved for R_IHIHALF. */
272 if (ihihalf_vaddr == (bfd_vma) -1)
274 relent->address = ihihalf_vaddr;
275 ihihalf_vaddr = (bfd_vma) -1;
276 relent->addend = reloc->r_symndx;
277 relent->sym_ptr_ptr= bfd_abs_section.symbol_ptr_ptr;
282 relent->sym_ptr_ptr = symbols + obj_convert(abfd)[reloc->r_symndx];
284 ptr = *(relent->sym_ptr_ptr);
287 && bfd_asymbol_bfd(ptr) == abfd
289 && ((ptr->flags & BSF_OLD_COMMON)== 0))
297 relent->address-= section->vma;
298 if (reloc->r_type == R_IHIHALF)
299 ihihalf_vaddr = relent->address;
300 else if (ihihalf_vaddr != (bfd_vma) -1)
305 #include "coffcode.h"
307 bfd_target a29kcoff_big_vec =
309 "coff-a29k-big", /* name */
310 bfd_target_coff_flavour,
311 true, /* data byte order is big */
312 true, /* header byte order is big */
314 (HAS_RELOC | EXEC_P | /* object flags */
315 HAS_LINENO | HAS_DEBUG |
316 HAS_SYMS | HAS_LOCALS | WP_TEXT),
318 (SEC_HAS_CONTENTS | SEC_ALLOC /* section flags */
319 | SEC_LOAD | SEC_RELOC
321 '_', /* leading underscore */
322 '/', /* ar_pad_char */
323 15, /* ar_max_namelen */
324 2, /* minimum section alignment */
326 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
327 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
328 bfd_getb16, bfd_getb_signed_16, bfd_putb16,
330 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
331 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
332 bfd_getb16, bfd_getb_signed_16, bfd_putb16,
338 bfd_generic_archive_p,
344 _bfd_generic_mkarchive,
349 coff_write_object_contents,
350 _bfd_write_archive_contents,
354 BFD_JUMP_TABLE_GENERIC (coff),
355 BFD_JUMP_TABLE_COPY (coff),
356 BFD_JUMP_TABLE_CORE (_bfd_nocore),
357 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
358 BFD_JUMP_TABLE_SYMBOLS (coff),
359 BFD_JUMP_TABLE_RELOCS (coff),
360 BFD_JUMP_TABLE_WRITE (coff),
361 BFD_JUMP_TABLE_LINK (coff),
362 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),