bfd/coff-a29k.c

   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.
   4
   5 This file is part of BFD, the Binary File Descriptor library.
   6
   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.
  11
  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.
  16
  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.  */
  20
  21 /* $Id$ */
  22
  23 #define A29K 1
  24
  25 #include "bfd.h"
  26 #include "sysdep.h"
  27 #include "libbfd.h"
  28 #include "obstack.h"
  29 #include "coff-a29k.h"
  30 #include "internalcoff.h"
  31 #include "libcoff.h"
  32
  33 #define INSERT_HWORD(WORD,HWORD)        \
  34         (((WORD) & 0xff00ff00) | (((HWORD) & 0xff00) << 8) | ((HWORD)& 0xff))
  35 #define EXTRACT_HWORD(WORD)     (((WORD) & 0x00ff0000) >> 8) | ((WORD) & 0xff)
  36
  37 /* Provided the symbol, returns the value reffed */
  38 static  long
  39 get_symbol_value(symbol)
  40 asymbol *symbol;
  41 {
  42   long relocation = 0;
  43
  44   if (symbol != (asymbol *)NULL) {
  45     if (symbol->flags & BSF_FORT_COMM) {
  46       relocation = 0;
  47     } else {
  48       relocation = symbol->value;
  49     }
  50     if (symbol->section != (asection *)NULL) {
  51       relocation += symbol->section->output_section->vma +
  52                 symbol->section->output_offset;
  53     }
  54   }
  55   return(relocation);
  56 }
  57
  58 static bfd_reloc_status_type
  59 a29k_reloc(abfd, reloc_entry, symbol_in, data, input_section)
  60 bfd *abfd;
  61 arelent *reloc_entry;
  62 asymbol *symbol_in;
  63 unsigned char *data;
  64 asection *input_section;
  65 {
  66     static unsigned long part1_consth_active=0;
  67     static unsigned long part1_consth_value;
  68     unsigned long insn, value, sym_value;
  69     unsigned short r_type;
  70     /*          bfd_reloc_status_type result;*/
  71     /*          coff_symbol_type *cs = coffsymbol(symbol_in);*/
  72
  73     r_type = reloc_entry->howto->type;
  74
  75     /* FIXME: Do we need to check for partial linking here */
  76     if (symbol_in && (symbol_in->flags & BSF_UNDEFINED)) {
  77         /* Keep the state machine happy in case we're called again */
  78         if (r_type == R_IHIHALF) {
  79             part1_consth_active = 1;
  80             part1_consth_value  = 0;
  81         }
  82         return(bfd_reloc_undefined);
  83     }
  84
  85     if ((part1_consth_active) && (r_type != R_IHCONST)) {
  86         fprintf(stderr,"Relocation problem : ");
  87         fprintf(stderr,"Missing IHCONST in module %s\n",abfd->filename);
  88         part1_consth_active = 0;
  89         return(bfd_reloc_dangerous);
  90     }
  91
  92     insn = bfd_get_32(abfd, data + reloc_entry->address);
  93     sym_value = get_symbol_value(symbol_in);
  94
  95     switch (r_type) {
  96        case R_IREL:
  97         /* We don't want to use the value already in the offset..
  98            The field isn't big enought to hold the full range of values.
  99            Will the break anything ? Steve@cygnus */
 100         value = 0;              /*EXTRACT_HWORD(insn) << 2;*/
 101         value +=  sym_value + reloc_entry->addend;
 102         if (0 && value <= 0x3ffff) { /* Absolute jmp/call */
 103             insn |= 0x01000000; /* Make it absolute */
 104             /* FIXME: Should we change r_type to R_IABS */
 105         } else {
 106             /* Relative jmp/call, so subtract from the value the
 107                address of the place we're coming from */
 108             value -= reloc_entry->address +
 109              input_section->output_section->vma +
 110               input_section->output_offset;
 111             if (value > 0x3ffff) {
 112                 fprintf(stderr,"Relocation problem : ");
 113                 fprintf(stderr,"Jmp/call too far; to %s from %s\n",
 114                         symbol_in->name,abfd->filename);
 115                 return(bfd_reloc_outofrange);
 116             }
 117         }
 118         value >>= 2;
 119         insn = INSERT_HWORD(insn,value);
 120         break;
 121        case R_ILOHALF:
 122         value = EXTRACT_HWORD(insn);
 123         value +=  sym_value + reloc_entry->addend;
 124         insn = INSERT_HWORD(insn,value);
 125         break;
 126        case R_IHIHALF:          /* consth, part 1 */
 127         /* Just get the symbol value that is referenced */
 128         part1_consth_active = 1;
 129         part1_consth_value = sym_value + reloc_entry->addend;
 130         return(bfd_reloc_ok);   /* Don't modify insn until R_IHCONST */
 131         break;
 132        case R_IHCONST:          /* consth, part 2 */
 133         /* Now relocate the reference */
 134         if (!part1_consth_active) {
 135             fprintf(stderr,"Relocation problem : ");
 136             fprintf(stderr,"IHIHALF missing in module %s\n",
 137                     abfd->filename);
 138             part1_consth_active = 0;
 139             return(bfd_reloc_dangerous);
 140         }
 141         /* sym_ptr_ptr = r_symndx, in coff_slurp_reloc_table() */
 142         value = 0;/*EXTRACT_HWORD(insn) << 16;*/
 143         value += (unsigned int)reloc_entry->addend; /* r_symndx */
 144         value += part1_consth_value;
 145         value >>= 16;
 146         insn = INSERT_HWORD(insn,value);
 147         part1_consth_active = 0;
 148         break;
 149        case R_BYTE:
 150         value = (insn >> 24) + sym_value + reloc_entry->addend;
 151         if (value & 0xffffff00) {
 152             fprintf(stderr,"Relocation problem : ");
 153             fprintf(stderr,"byte value too large in module %s\n",
 154                     abfd->filename);
 155             return(bfd_reloc_overflow);
 156         }
 157         insn = (insn & 0x00ffffff) | (value << 24);
 158         break;
 159        case R_HWORD:
 160         value = (insn >> 16) + sym_value + reloc_entry->addend;
 161         if (value & 0xffff0000) {
 162             fprintf(stderr,"Relocation problem : ");
 163             fprintf(stderr,"hword value too large in module %s\n",
 164                     abfd->filename);
 165             return(bfd_reloc_overflow);
 166         }
 167         insn = (insn & 0x0000ffff) | (value<<16);
 168         break;
 169        case R_WORD:
 170         insn += sym_value + reloc_entry->addend;
 171         break;
 172        default:
 173         fprintf(stderr,"Relocation problem : ");
 174         fprintf(stderr,"Unrecognized reloc type %d, in module %s\n",
 175                 r_type,abfd->filename);
 176         return (bfd_reloc_dangerous);
 177     }
 178
 179     bfd_put_32(abfd, insn, data+reloc_entry->address);
 180     return(bfd_reloc_ok);
 181 }
 182
 183 /*      type       rightshift
 184                        size
 185                           bitsize
 186                                pc-relative
 187                                      bitpos
 188                                          absolute
 189                                              complain_on_overflow
 190                                                   special_function
 191                                                     relocation name
 192                                                                partial_inplace
 193                                                                       src_mask
 194 */
 195
 196 /*FIXME: I'm not real sure about this table */
 197 #define NA      0       /* Obsolete fields, via the documentation */
 198 static reloc_howto_type howto_table[] =
 199 {
 200   {R_ABS,     0, 3, NA, false, NA, NA, true,a29k_reloc,"ABS",     true, 0xffffffff,0xffffffff, false},
 201   {1},  {2},  {3},   {4},  {5},  {6},  {7},  {8},  {9}, {10},
 202   {11}, {12}, {13}, {14}, {15}, {16}, {17}, {18}, {19}, {20},
 203   {21}, {22}, {23},
 204   {R_IREL,    0, 3, NA, true,  NA, NA, true,a29k_reloc,"IREL",    true, 0xffffffff,0xffffffff, false},
 205   {R_IABS,    0, 3, NA, false, NA, NA, true,a29k_reloc,"IABS",    true, 0xffffffff,0xffffffff, false},
 206   {R_ILOHALF, 0, 3, NA, true,  NA, NA, true,a29k_reloc,"ILOHALF", true, 0x0000ffff,0x0000ffff, false},
 207   {R_IHIHALF, 0, 3, NA, true,  NA, NA, true,a29k_reloc,"IHIHALF", true, 0xffff0000,0xffff0000, false},
 208   {R_IHCONST, 0, 3, NA, true,  NA, NA, true,a29k_reloc,"IHCONST", true, 0xffff0000,0xffff0000, false},
 209   {R_BYTE,    0, 0, NA, false, NA, NA, true,a29k_reloc,"BYTE",    true, 0x000000ff,0x000000ff, false},
 210   {R_HWORD,   0, 1, NA, false, NA, NA, true,a29k_reloc,"HWORD",   true, 0x0000ffff,0x0000ffff, false},
 211   {R_WORD,    0, 2, NA, false, NA, NA, true,a29k_reloc,"WORD",    true, 0xffffffff,0xffffffff, false},
 212 };
 213 #undef NA
 214
 215 #define BADMAG(x) A29KBADMAG(x)
 216
 217 #include "coffcode.h"
 218
 219 bfd_target a29kcoff_big_vec =
 220 {
 221   "coff-a29k-big",              /* name */
 222   bfd_target_coff_flavour,
 223   true,                         /* data byte order is big */
 224   true,                         /* header byte order is big */
 225
 226   (HAS_RELOC | EXEC_P |         /* object flags */
 227    HAS_LINENO | HAS_DEBUG |
 228    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT),
 229
 230   (SEC_HAS_CONTENTS | SEC_ALLOC /* section flags */
 231         | SEC_LOAD | SEC_RELOC
 232         | SEC_READONLY ),
 233   '/',                          /* ar_pad_char */
 234   15,                           /* ar_max_namelen */
 235
 236      2,                         /* minimum section alignment */
 237 _do_getb64, _do_putb64,  _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* data */
 238 _do_getb64, _do_putb64,  _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* hdrs */
 239
 240
 241   {_bfd_dummy_target, coff_object_p, /* bfd_check_format */
 242      bfd_generic_archive_p, _bfd_dummy_target},
 243   {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
 244      bfd_false},
 245   {bfd_false, coff_write_object_contents,       /* bfd_write_contents */
 246      _bfd_write_archive_contents, bfd_false},
 247
 248      JUMP_TABLE(coff),
 249      COFF_SWAP_TABLE
 250   };
 251