bfd/coff-sparc.c

   1 /* BFD back-end for Sparc COFF files.
   2    Copyright 1990, 91, 92, 93, 94, 95, 96, 1997 Free Software Foundation, Inc.
   3    Written by Cygnus Support.
   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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21 #include "bfd.h"
  22 #include "sysdep.h"
  23 #include "libbfd.h"
  24 #include "coff/sparc.h"
  25 #include "coff/internal.h"
  26 #include "libcoff.h"
  27
  28 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (3)
  29
  30 #define BADMAG(x) ((x).f_magic != SPARCMAGIC && (x).f_magic != LYNXCOFFMAGIC)
  31
  32 /* The page size is a guess based on ELF.  */
  33 #define COFF_PAGE_SIZE 0x10000
  34
  35 enum reloc_type
  36   {
  37     R_SPARC_NONE = 0,
  38     R_SPARC_8,          R_SPARC_16,             R_SPARC_32,
  39     R_SPARC_DISP8,      R_SPARC_DISP16,         R_SPARC_DISP32,
  40     R_SPARC_WDISP30,    R_SPARC_WDISP22,
  41     R_SPARC_HI22,       R_SPARC_22,
  42     R_SPARC_13,         R_SPARC_LO10,
  43     R_SPARC_GOT10,      R_SPARC_GOT13,          R_SPARC_GOT22,
  44     R_SPARC_PC10,       R_SPARC_PC22,
  45     R_SPARC_WPLT30,
  46     R_SPARC_COPY,
  47     R_SPARC_GLOB_DAT,   R_SPARC_JMP_SLOT,
  48     R_SPARC_RELATIVE,
  49     R_SPARC_UA32,
  50     R_SPARC_max
  51   };
  52
  53 #if 0
  54 static CONST char *CONST reloc_type_names[] =
  55 {
  56   "R_SPARC_NONE",
  57   "R_SPARC_8",          "R_SPARC_16",           "R_SPARC_32",
  58   "R_SPARC_DISP8",      "R_SPARC_DISP16",       "R_SPARC_DISP32",
  59   "R_SPARC_WDISP30",    "R_SPARC_WDISP22",
  60   "R_SPARC_HI22",       "R_SPARC_22",
  61   "R_SPARC_13",         "R_SPARC_LO10",
  62   "R_SPARC_GOT10",      "R_SPARC_GOT13",        "R_SPARC_GOT22",
  63   "R_SPARC_PC10",       "R_SPARC_PC22",
  64   "R_SPARC_WPLT30",
  65   "R_SPARC_COPY",
  66   "R_SPARC_GLOB_DAT",   "R_SPARC_JMP_SLOT",
  67   "R_SPARC_RELATIVE",
  68   "R_SPARC_UA32",
  69 };
  70 #endif
  71
  72 /* This is stolen pretty directly from elf.c.  */
  73 static bfd_reloc_status_type
  74 bfd_coff_generic_reloc PARAMS ((bfd *, arelent *, asymbol *, PTR,
  75                                 asection *, bfd *, char **));
  76
  77 static bfd_reloc_status_type
  78 bfd_coff_generic_reloc (abfd, reloc_entry, symbol, data, input_section,
  79                         output_bfd, error_message)
  80      bfd *abfd;
  81      arelent *reloc_entry;
  82      asymbol *symbol;
  83      PTR data;
  84      asection *input_section;
  85      bfd *output_bfd;
  86      char **error_message;
  87 {
  88   if (output_bfd != (bfd *) NULL
  89       && (symbol->flags & BSF_SECTION_SYM) == 0)
  90     {
  91       reloc_entry->address += input_section->output_offset;
  92       return bfd_reloc_ok;
  93     }
  94
  95   return bfd_reloc_continue;
  96 }
  97
  98 static reloc_howto_type coff_sparc_howto_table[] =
  99 {
 100   HOWTO(R_SPARC_NONE,    0,0, 0,false,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_NONE",    false,0,0x00000000,true),
 101   HOWTO(R_SPARC_8,       0,0, 8,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_8",       false,0,0x000000ff,true),
 102   HOWTO(R_SPARC_16,      0,1,16,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_16",      false,0,0x0000ffff,true),
 103   HOWTO(R_SPARC_32,      0,2,32,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_32",      false,0,0xffffffff,true),
 104   HOWTO(R_SPARC_DISP8,   0,0, 8,true, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_DISP8",   false,0,0x000000ff,true),
 105   HOWTO(R_SPARC_DISP16,  0,1,16,true, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_DISP16",  false,0,0x0000ffff,true),
 106   HOWTO(R_SPARC_DISP32,  0,2,32,true, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_DISP32",  false,0,0x00ffffff,true),
 107   HOWTO(R_SPARC_WDISP30, 2,2,30,true, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_WDISP30", false,0,0x3fffffff,true),
 108   HOWTO(R_SPARC_WDISP22, 2,2,22,true, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_WDISP22", false,0,0x003fffff,true),
 109   HOWTO(R_SPARC_HI22,   10,2,22,false,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_HI22",    false,0,0x003fffff,true),
 110   HOWTO(R_SPARC_22,      0,2,22,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_22",      false,0,0x003fffff,true),
 111   HOWTO(R_SPARC_13,      0,2,13,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_13",      false,0,0x00001fff,true),
 112   HOWTO(R_SPARC_LO10,    0,2,10,false,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_LO10",    false,0,0x000003ff,true),
 113   HOWTO(R_SPARC_GOT10,   0,2,10,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_GOT10",   false,0,0x000003ff,true),
 114   HOWTO(R_SPARC_GOT13,   0,2,13,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_GOT13",   false,0,0x00001fff,true),
 115   HOWTO(R_SPARC_GOT22,  10,2,22,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_GOT22",   false,0,0x003fffff,true),
 116   HOWTO(R_SPARC_PC10,    0,2,10,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_PC10",    false,0,0x000003ff,true),
 117   HOWTO(R_SPARC_PC22,    0,2,22,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_PC22",    false,0,0x003fffff,true),
 118   HOWTO(R_SPARC_WPLT30,  0,0,00,false,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_WPLT30",  false,0,0x00000000,true),
 119   HOWTO(R_SPARC_COPY,    0,0,00,false,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_COPY",    false,0,0x00000000,true),
 120   HOWTO(R_SPARC_GLOB_DAT,0,0,00,false,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_GLOB_DAT",false,0,0x00000000,true),
 121   HOWTO(R_SPARC_JMP_SLOT,0,0,00,false,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_JMP_SLOT",false,0,0x00000000,true),
 122   HOWTO(R_SPARC_RELATIVE,0,0,00,false,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_RELATIVE",false,0,0x00000000,true),
 123   HOWTO(R_SPARC_UA32,    0,0,00,false,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_UA32",    false,0,0x00000000,true),
 124 };
 125
 126 struct coff_reloc_map {
 127   bfd_reloc_code_real_type bfd_reloc_val;
 128   unsigned char coff_reloc_val;
 129 };
 130
 131 static CONST struct coff_reloc_map sparc_reloc_map[] =
 132 {
 133   { BFD_RELOC_NONE, R_SPARC_NONE, },
 134   { BFD_RELOC_16, R_SPARC_16, },
 135   { BFD_RELOC_8, R_SPARC_8 },
 136   { BFD_RELOC_8_PCREL, R_SPARC_DISP8 },
 137   { BFD_RELOC_CTOR, R_SPARC_32 }, /* @@ Assumes 32 bits.  */
 138   { BFD_RELOC_32, R_SPARC_32 },
 139   { BFD_RELOC_32_PCREL, R_SPARC_DISP32 },
 140   { BFD_RELOC_HI22, R_SPARC_HI22 },
 141   { BFD_RELOC_LO10, R_SPARC_LO10, },
 142   { BFD_RELOC_32_PCREL_S2, R_SPARC_WDISP30 },
 143   { BFD_RELOC_SPARC22, R_SPARC_22 },
 144   { BFD_RELOC_SPARC13, R_SPARC_13 },
 145   { BFD_RELOC_SPARC_GOT10, R_SPARC_GOT10 },
 146   { BFD_RELOC_SPARC_GOT13, R_SPARC_GOT13 },
 147   { BFD_RELOC_SPARC_GOT22, R_SPARC_GOT22 },
 148   { BFD_RELOC_SPARC_PC10, R_SPARC_PC10 },
 149   { BFD_RELOC_SPARC_PC22, R_SPARC_PC22 },
 150   { BFD_RELOC_SPARC_WPLT30, R_SPARC_WPLT30 },
 151   { BFD_RELOC_SPARC_COPY, R_SPARC_COPY },
 152   { BFD_RELOC_SPARC_GLOB_DAT, R_SPARC_GLOB_DAT },
 153   { BFD_RELOC_SPARC_JMP_SLOT, R_SPARC_JMP_SLOT },
 154   { BFD_RELOC_SPARC_RELATIVE, R_SPARC_RELATIVE },
 155   { BFD_RELOC_SPARC_WDISP22, R_SPARC_WDISP22 },
 156   /*  { BFD_RELOC_SPARC_UA32, R_SPARC_UA32 }, not used?? */
 157 };
 158
 159 static reloc_howto_type *
 160 coff_sparc_reloc_type_lookup (abfd, code)
 161      bfd *abfd;
 162      bfd_reloc_code_real_type code;
 163 {
 164   unsigned int i;
 165   for (i = 0; i < sizeof (sparc_reloc_map) / sizeof (struct coff_reloc_map); i++)
 166     {
 167       if (sparc_reloc_map[i].bfd_reloc_val == code)
 168         return &coff_sparc_howto_table[(int) sparc_reloc_map[i].coff_reloc_val];
 169     }
 170   return 0;
 171 }
 172 #define coff_bfd_reloc_type_lookup      coff_sparc_reloc_type_lookup
 173
 174 static void
 175 rtype2howto (cache_ptr, dst)
 176      arelent *cache_ptr;
 177      struct internal_reloc *dst;
 178 {
 179   BFD_ASSERT (dst->r_type < (unsigned int) R_SPARC_max);
 180   cache_ptr->howto = &coff_sparc_howto_table[dst->r_type];
 181 }
 182
 183 #define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry)
 184
 185 #define SWAP_IN_RELOC_OFFSET    bfd_h_get_32
 186 #define SWAP_OUT_RELOC_OFFSET   bfd_h_put_32
 187 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
 188   cache_ptr->addend = reloc.r_offset;
 189
 190 /* Clear the r_spare field in relocs.  */
 191 #define SWAP_OUT_RELOC_EXTRA(abfd,src,dst) \
 192   do { \
 193        dst->r_spare[0] = 0; \
 194        dst->r_spare[1] = 0; \
 195      } while (0)
 196
 197 #define __A_MAGIC_SET__
 198
 199 /* Enable Sparc-specific hacks in coffcode.h. */
 200
 201 #define COFF_SPARC
 202
 203 #include "coffcode.h"
 204
 205 const bfd_target
 206 #ifdef TARGET_SYM
 207   TARGET_SYM =
 208 #else
 209   sparccoff_vec =
 210 #endif
 211 {
 212 #ifdef TARGET_NAME
 213   TARGET_NAME,
 214 #else
 215   "coff-sparc",                 /* name */
 216 #endif
 217   bfd_target_coff_flavour,
 218   BFD_ENDIAN_BIG,       /* data byte order is big */
 219   BFD_ENDIAN_BIG,       /* header byte order is big */
 220
 221   (HAS_RELOC | EXEC_P |         /* object flags */
 222    HAS_LINENO | HAS_DEBUG |
 223    HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 224
 225   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 226   '_',                          /* leading underscore */
 227   '/',                          /* ar_pad_char */
 228   15,                           /* ar_max_namelen */
 229
 230   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 231      bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 232      bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
 233   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 234      bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 235      bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
 236
 237 /* Note that we allow an object file to be treated as a core file as well. */
 238     {_bfd_dummy_target, coff_object_p, /* bfd_check_format */
 239        bfd_generic_archive_p, coff_object_p},
 240     {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
 241        bfd_false},
 242     {bfd_false, coff_write_object_contents, /* bfd_write_contents */
 243        _bfd_write_archive_contents, bfd_false},
 244
 245      BFD_JUMP_TABLE_GENERIC (coff),
 246      BFD_JUMP_TABLE_COPY (coff),
 247      BFD_JUMP_TABLE_CORE (_bfd_nocore),
 248      BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
 249      BFD_JUMP_TABLE_SYMBOLS (coff),
 250      BFD_JUMP_TABLE_RELOCS (coff),
 251      BFD_JUMP_TABLE_WRITE (coff),
 252      BFD_JUMP_TABLE_LINK (coff),
 253      BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 254
 255   COFF_SWAP_TABLE,
 256 };