bfd/coff-sparc.c

   1 /* BFD back-end for Sparc COFF files.
   2    Copyright 1990, 1991, 1992, 1993 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  20
  21 #include "bfd.h"
  22 #include "sysdep.h"
  23 #include "libbfd.h"
  24 #include "obstack.h"
  25 #include "coff/sparc.h"
  26 #include "coff/internal.h"
  27 #include "libcoff.h"
  28
  29 #define BADMAG(x) ((x).f_magic != SPARCMAGIC)
  30
  31 enum reloc_type
  32   {
  33     R_SPARC_NONE = 0,
  34     R_SPARC_8,          R_SPARC_16,             R_SPARC_32,
  35     R_SPARC_DISP8,      R_SPARC_DISP16,         R_SPARC_DISP32,
  36     R_SPARC_WDISP30,    R_SPARC_WDISP22,
  37     R_SPARC_HI22,       R_SPARC_22,
  38     R_SPARC_13,         R_SPARC_LO10,
  39     R_SPARC_GOT10,      R_SPARC_GOT13,          R_SPARC_GOT22,
  40     R_SPARC_PC10,       R_SPARC_PC22,
  41     R_SPARC_WPLT30,
  42     R_SPARC_COPY,
  43     R_SPARC_GLOB_DAT,   R_SPARC_JMP_SLOT,
  44     R_SPARC_RELATIVE,
  45     R_SPARC_UA32,
  46     R_SPARC_max
  47   };
  48
  49 #if 0
  50 static CONST char *CONST reloc_type_names[] =
  51 {
  52   "R_SPARC_NONE",
  53   "R_SPARC_8",          "R_SPARC_16",           "R_SPARC_32",
  54   "R_SPARC_DISP8",      "R_SPARC_DISP16",       "R_SPARC_DISP32",
  55   "R_SPARC_WDISP30",    "R_SPARC_WDISP22",
  56   "R_SPARC_HI22",       "R_SPARC_22",
  57   "R_SPARC_13",         "R_SPARC_LO10",
  58   "R_SPARC_GOT10",      "R_SPARC_GOT13",        "R_SPARC_GOT22",
  59   "R_SPARC_PC10",       "R_SPARC_PC22",
  60   "R_SPARC_WPLT30",
  61   "R_SPARC_COPY",
  62   "R_SPARC_GLOB_DAT",   "R_SPARC_JMP_SLOT",
  63   "R_SPARC_RELATIVE",
  64   "R_SPARC_UA32",
  65 };
  66 #endif
  67
  68 /* This is stolen pretty directly from elf.c.  */
  69 static bfd_reloc_status_type
  70 bfd_coff_generic_reloc PARAMS ((bfd *, arelent *, asymbol *, PTR,
  71                                 asection *, bfd *, char **));
  72
  73 static bfd_reloc_status_type
  74 bfd_coff_generic_reloc (abfd, reloc_entry, symbol, data, input_section,
  75                         output_bfd, error_message)
  76      bfd *abfd;
  77      arelent *reloc_entry;
  78      asymbol *symbol;
  79      PTR data;
  80      asection *input_section;
  81      bfd *output_bfd;
  82      char **error_message;
  83 {
  84   if (output_bfd != (bfd *) NULL
  85       && (symbol->flags & BSF_SECTION_SYM) == 0
  86       && reloc_entry->addend == 0)
  87     {
  88       reloc_entry->address += input_section->output_offset;
  89       return bfd_reloc_ok;
  90     }
  91
  92   return bfd_reloc_continue;
  93 }
  94
  95 static reloc_howto_type coff_sparc_howto_table[] =
  96 {
  97   HOWTO(R_SPARC_NONE,    0,0, 0,false,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_NONE",    false,0,0x00000000,true),
  98   HOWTO(R_SPARC_8,       0,0, 8,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_8",       false,0,0x000000ff,true),
  99   HOWTO(R_SPARC_16,      0,1,16,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_16",      false,0,0x0000ffff,true),
 100   HOWTO(R_SPARC_32,      0,2,32,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_32",      false,0,0xffffffff,true),
 101   HOWTO(R_SPARC_DISP8,   0,0, 8,true, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_DISP8",   false,0,0x000000ff,true),
 102   HOWTO(R_SPARC_DISP16,  0,1,16,true, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_DISP16",  false,0,0x0000ffff,true),
 103   HOWTO(R_SPARC_DISP32,  0,2,32,true, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_DISP32",  false,0,0x00ffffff,true),
 104   HOWTO(R_SPARC_WDISP30, 2,2,30,true, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_WDISP30", false,0,0x3fffffff,true),
 105   HOWTO(R_SPARC_WDISP22, 2,2,22,true, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_WDISP22", false,0,0x003fffff,true),
 106   HOWTO(R_SPARC_HI22,   10,2,22,false,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_HI22",    false,0,0x003fffff,true),
 107   HOWTO(R_SPARC_22,      0,2,22,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_22",      false,0,0x003fffff,true),
 108   HOWTO(R_SPARC_13,      0,2,13,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_13",      false,0,0x00001fff,true),
 109   HOWTO(R_SPARC_LO10,    0,2,10,false,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_LO10",    false,0,0x000003ff,true),
 110   HOWTO(R_SPARC_GOT10,   0,2,10,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_GOT10",   false,0,0x000003ff,true),
 111   HOWTO(R_SPARC_GOT13,   0,2,13,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_GOT13",   false,0,0x00001fff,true),
 112   HOWTO(R_SPARC_GOT22,  10,2,22,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_GOT22",   false,0,0x003fffff,true),
 113   HOWTO(R_SPARC_PC10,    0,2,10,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_PC10",    false,0,0x000003ff,true),
 114   HOWTO(R_SPARC_PC22,    0,2,22,false,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_PC22",    false,0,0x003fffff,true),
 115   HOWTO(R_SPARC_WPLT30,  0,0,00,false,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_WPLT30",  false,0,0x00000000,true),
 116   HOWTO(R_SPARC_COPY,    0,0,00,false,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_COPY",    false,0,0x00000000,true),
 117   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),
 118   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),
 119   HOWTO(R_SPARC_RELATIVE,0,0,00,false,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_RELATIVE",false,0,0x00000000,true),
 120   HOWTO(R_SPARC_UA32,    0,0,00,false,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_UA32",    false,0,0x00000000,true),
 121 };
 122
 123 struct coff_reloc_map {
 124   unsigned char bfd_reloc_val;
 125   unsigned char coff_reloc_val;
 126 };
 127
 128 static CONST struct coff_reloc_map sparc_reloc_map[] =
 129 {
 130   { BFD_RELOC_NONE, R_SPARC_NONE, },
 131   { BFD_RELOC_16, R_SPARC_16, },
 132   { BFD_RELOC_8, R_SPARC_8 },
 133   { BFD_RELOC_8_PCREL, R_SPARC_DISP8 },
 134   { BFD_RELOC_CTOR, R_SPARC_32 }, /* @@ Assumes 32 bits.  */
 135   { BFD_RELOC_32, R_SPARC_32 },
 136   { BFD_RELOC_32_PCREL, R_SPARC_DISP32 },
 137   { BFD_RELOC_HI22, R_SPARC_HI22 },
 138   { BFD_RELOC_LO10, R_SPARC_LO10, },
 139   { BFD_RELOC_32_PCREL_S2, R_SPARC_WDISP30 },
 140   { BFD_RELOC_SPARC22, R_SPARC_22 },
 141   { BFD_RELOC_SPARC13, R_SPARC_13 },
 142   { BFD_RELOC_SPARC_GOT10, R_SPARC_GOT10 },
 143   { BFD_RELOC_SPARC_GOT13, R_SPARC_GOT13 },
 144   { BFD_RELOC_SPARC_GOT22, R_SPARC_GOT22 },
 145   { BFD_RELOC_SPARC_PC10, R_SPARC_PC10 },
 146   { BFD_RELOC_SPARC_PC22, R_SPARC_PC22 },
 147   { BFD_RELOC_SPARC_WPLT30, R_SPARC_WPLT30 },
 148   { BFD_RELOC_SPARC_COPY, R_SPARC_COPY },
 149   { BFD_RELOC_SPARC_GLOB_DAT, R_SPARC_GLOB_DAT },
 150   { BFD_RELOC_SPARC_JMP_SLOT, R_SPARC_JMP_SLOT },
 151   { BFD_RELOC_SPARC_RELATIVE, R_SPARC_RELATIVE },
 152   { BFD_RELOC_SPARC_WDISP22, R_SPARC_WDISP22 },
 153   /*  { BFD_RELOC_SPARC_UA32, R_SPARC_UA32 }, not used?? */
 154 };
 155
 156 static CONST struct reloc_howto_struct *
 157 coff_sparc_reloc_type_lookup (abfd, code)
 158      bfd *abfd;
 159      bfd_reloc_code_real_type code;
 160 {
 161   int i;
 162   for (i = 0; i < sizeof (sparc_reloc_map) / sizeof (struct coff_reloc_map); i++)
 163     {
 164       if (sparc_reloc_map[i].bfd_reloc_val == code)
 165         return &coff_sparc_howto_table[(int) sparc_reloc_map[i].coff_reloc_val];
 166     }
 167   return 0;
 168 }
 169 #define coff_bfd_reloc_type_lookup      coff_sparc_reloc_type_lookup
 170
 171 static void
 172 rtype2howto (cache_ptr, dst)
 173      arelent *cache_ptr;
 174      struct internal_reloc *dst;
 175 {
 176   BFD_ASSERT (dst->r_type < (unsigned int) R_SPARC_max);
 177   cache_ptr->howto = &coff_sparc_howto_table[dst->r_type];
 178 }
 179
 180 #define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry)
 181
 182 #define SWAP_IN_RELOC_OFFSET    bfd_h_get_32
 183 #define SWAP_OUT_RELOC_OFFSET   bfd_h_put_32
 184 /* This is just like the standard one, except for the addition of the
 185    last line, the adjustment of the addend.  */
 186 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr)                \
 187   {                                                             \
 188     coff_symbol_type *coffsym = (coff_symbol_type *) NULL;      \
 189     if (ptr && bfd_asymbol_bfd (ptr) != abfd)                   \
 190       coffsym = (obj_symbols (abfd)                             \
 191                  + (cache_ptr->sym_ptr_ptr - symbols));         \
 192     else if (ptr)                                               \
 193       coffsym = coff_symbol_from (abfd, ptr);                   \
 194     if (coffsym != (coff_symbol_type *) NULL                    \
 195         && coffsym->native->u.syment.n_scnum == 0)              \
 196       cache_ptr->addend = 0;                                    \
 197     else if (ptr && bfd_asymbol_bfd (ptr) == abfd               \
 198              && ptr->section != (asection *) NULL)              \
 199       cache_ptr->addend = - (ptr->section->vma + ptr->value);   \
 200     else                                                        \
 201       cache_ptr->addend = 0;                                    \
 202     cache_ptr->addend += reloc.r_offset;                        \
 203   }
 204
 205 #define __A_MAGIC_SET__
 206
 207 #include "coffcode.h"
 208
 209 bfd_target
 210 #ifdef TARGET_SYM
 211   TARGET_SYM =
 212 #else
 213   sparccoff_vec =
 214 #endif
 215 {
 216 #ifdef TARGET_NAME
 217   TARGET_NAME,
 218 #else
 219   "coff-sparc",                 /* name */
 220 #endif
 221   bfd_target_coff_flavour,
 222   true,                 /* data byte order is big */
 223   true,                 /* header byte order is big */
 224
 225   (HAS_RELOC | EXEC_P |         /* object flags */
 226    HAS_LINENO | HAS_DEBUG |
 227    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT),
 228
 229   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 230   0,                            /* leading underscore */
 231   '/',                          /* ar_pad_char */
 232   15,                           /* ar_max_namelen */
 233
 234   2,                            /* minimum alignment power */
 235   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 236      bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 237      bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
 238   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 239      bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 240      bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
 241
 242 /* Note that we allow an object file to be treated as a core file as well. */
 243     {_bfd_dummy_target, coff_object_p, /* bfd_check_format */
 244        bfd_generic_archive_p, coff_object_p},
 245     {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
 246        bfd_false},
 247     {bfd_false, coff_write_object_contents, /* bfd_write_contents */
 248        _bfd_write_archive_contents, bfd_false},
 249
 250      BFD_JUMP_TABLE_GENERIC (coff),
 251      BFD_JUMP_TABLE_COPY (coff),
 252      BFD_JUMP_TABLE_CORE (_bfd_nocore),
 253      BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
 254      BFD_JUMP_TABLE_SYMBOLS (coff),
 255      BFD_JUMP_TABLE_RELOCS (coff),
 256      BFD_JUMP_TABLE_WRITE (coff),
 257      BFD_JUMP_TABLE_LINK (coff),
 258
 259   COFF_SWAP_TABLE,
 260 };
 261