1 /* BFD back-end for AMD 29000 COFF binaries.
2 Copyright 1990, 1991, 1992, 1993 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&~0x3ffff) == 0)
130 { /* Absolute jmp/call */
131 insn |= (1<<24); /* Make it absolute */
132 /* FIXME: Should we change r_type to R_IABS */
136 /* Relative jmp/call, so subtract from the value the
137 address of the place we're coming from */
138 signed_value -= (input_section->output_section->vma
139 + input_section->output_offset);
140 if (signed_value>0x1ffff || signed_value<-0x20000)
141 return(bfd_reloc_overflow);
144 insn = INSERT_HWORD(insn, signed_value);
145 bfd_put_32(abfd, insn ,hit_data);
148 insn = bfd_get_32(abfd, hit_data);
149 unsigned_value = EXTRACT_HWORD(insn);
150 unsigned_value += sym_value + reloc_entry->addend;
151 insn = INSERT_HWORD(insn, unsigned_value);
152 bfd_put_32(abfd, insn, hit_data);
155 insn = bfd_get_32(abfd, hit_data);
157 Just get the symbol value that is referenced */
158 part1_consth_active = true;
159 part1_consth_value = sym_value + reloc_entry->addend;
160 /* Don't modify insn until R_IHCONST */
163 insn = bfd_get_32(abfd, hit_data);
165 Now relocate the reference */
166 if (part1_consth_active == false) {
167 *error_message = (char *) "Missing IHIHALF";
168 return(bfd_reloc_dangerous);
170 /* sym_ptr_ptr = r_symndx, in coff_slurp_reloc_table() */
171 unsigned_value = 0; /*EXTRACT_HWORD(insn) << 16;*/
172 unsigned_value += reloc_entry->addend; /* r_symndx */
173 unsigned_value += part1_consth_value;
174 unsigned_value = unsigned_value >> 16;
175 insn = INSERT_HWORD(insn, unsigned_value);
176 part1_consth_active = false;
177 bfd_put_32(abfd, insn, hit_data);
180 insn = bfd_get_8(abfd, hit_data);
181 unsigned_value = insn + sym_value + reloc_entry->addend;
182 if (unsigned_value & 0xffffff00) {
183 fprintf(stderr,"Relocation problem : ");
184 fprintf(stderr,"byte value too large in module %s\n",
186 return(bfd_reloc_overflow);
188 bfd_put_8(abfd, unsigned_value, hit_data);
191 insn = bfd_get_16(abfd, hit_data);
192 unsigned_value = insn + sym_value + reloc_entry->addend;
193 if (unsigned_value & 0xffff0000) {
194 fprintf(stderr,"Relocation problem : ");
195 fprintf(stderr,"hword value too large in module %s\n",
197 return(bfd_reloc_overflow);
200 bfd_put_16(abfd, insn, hit_data);
203 insn = bfd_get_32(abfd, hit_data);
204 insn += sym_value + reloc_entry->addend;
205 bfd_put_32(abfd, insn, hit_data);
208 *error_message = "Unrecognized reloc";
209 return (bfd_reloc_dangerous);
213 return(bfd_reloc_ok);
229 /*FIXME: I'm not real sure about this table */
230 static reloc_howto_type howto_table[] =
232 {R_ABS, 0, 3, 32, false, 0, complain_overflow_bitfield,a29k_reloc,"ABS", true, 0xffffffff,0xffffffff, false},
233 {1}, {2}, {3}, {4}, {5}, {6}, {7}, {8}, {9}, {10},
234 {11}, {12}, {13}, {14}, {15}, {16}, {17}, {18}, {19}, {20},
236 {R_IREL, 0, 3, 32, true, 0, complain_overflow_signed,a29k_reloc,"IREL", true, 0xffffffff,0xffffffff, false},
237 {R_IABS, 0, 3, 32, false, 0, complain_overflow_bitfield, a29k_reloc,"IABS", true, 0xffffffff,0xffffffff, false},
238 {R_ILOHALF, 0, 3, 16, true, 0, complain_overflow_signed, a29k_reloc,"ILOHALF", true, 0x0000ffff,0x0000ffff, false},
239 {R_IHIHALF, 0, 3, 16, true, 16, complain_overflow_signed, a29k_reloc,"IHIHALF", true, 0xffff0000,0xffff0000, false},
240 {R_IHCONST, 0, 3, 16, true, 0, complain_overflow_signed, a29k_reloc,"IHCONST", true, 0xffff0000,0xffff0000, false},
241 {R_BYTE, 0, 0, 8, false, 0, complain_overflow_bitfield, a29k_reloc,"BYTE", true, 0x000000ff,0x000000ff, false},
242 {R_HWORD, 0, 1, 16, false, 0, complain_overflow_bitfield, a29k_reloc,"HWORD", true, 0x0000ffff,0x0000ffff, false},
243 {R_WORD, 0, 2, 32, false, 0, complain_overflow_bitfield, a29k_reloc,"WORD", true, 0xffffffff,0xffffffff, false},
246 #define BADMAG(x) A29KBADMAG(x)
248 #define RELOC_PROCESSING(relent, reloc, symbols, abfd, section) \
249 reloc_processing(relent, reloc, symbols, abfd, section)
251 static void DEFUN(reloc_processing,(relent,reloc, symbols, abfd, section) ,
253 struct internal_reloc *reloc AND
254 asymbol **symbols AND
258 relent->address = reloc->r_vaddr;
259 relent->howto = howto_table + reloc->r_type;
260 if (reloc->r_type == R_IHCONST)
262 relent->addend = reloc->r_symndx;
263 relent->sym_ptr_ptr= bfd_abs_section.symbol_ptr_ptr;
268 relent->sym_ptr_ptr = symbols + obj_convert(abfd)[reloc->r_symndx];
270 ptr = *(relent->sym_ptr_ptr);
273 && bfd_asymbol_bfd(ptr) == abfd
275 && ((ptr->flags & BSF_OLD_COMMON)== 0))
283 relent->address-= section->vma;
287 #include "coffcode.h"
289 bfd_target a29kcoff_big_vec =
291 "coff-a29k-big", /* name */
292 bfd_target_coff_flavour,
293 true, /* data byte order is big */
294 true, /* header byte order is big */
296 (HAS_RELOC | EXEC_P | /* object flags */
297 HAS_LINENO | HAS_DEBUG |
298 HAS_SYMS | HAS_LOCALS | WP_TEXT),
300 (SEC_HAS_CONTENTS | SEC_ALLOC /* section flags */
301 | SEC_LOAD | SEC_RELOC
303 '_', /* leading underscore */
304 '/', /* ar_pad_char */
305 15, /* ar_max_namelen */
306 2, /* minimum section alignment */
308 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
309 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
310 bfd_getb16, bfd_getb_signed_16, bfd_putb16,
312 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
313 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
314 bfd_getb16, bfd_getb_signed_16, bfd_putb16,
320 bfd_generic_archive_p,
326 _bfd_generic_mkarchive,
331 coff_write_object_contents,
332 _bfd_write_archive_contents,