bfd/nlm32-sparc.c

   1 /* Support for 32-bit SPARC NLM (NetWare Loadable Module)
   2    Copyright 1993, 1994, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
   3    2007, 2009 Free Software Foundation, Inc.
   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 3 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., 51 Franklin Street - Fifth Floor, Boston,
  20    MA 02110-1301, USA.  */
  21
  22 #include "sysdep.h"
  23 #include "bfd.h"
  24 #include "libbfd.h"
  25
  26 #define ARCH_SIZE 32
  27
  28 #include "nlm/sparc32-ext.h"
  29 #define Nlm_External_Fixed_Header       Nlm32_sparc_External_Fixed_Header
  30
  31 #include "libnlm.h"
  32
  33 enum reloc_type
  34 {
  35   R_SPARC_NONE = 0,
  36   R_SPARC_8,            R_SPARC_16,             R_SPARC_32,
  37   R_SPARC_DISP8,        R_SPARC_DISP16,         R_SPARC_DISP32,
  38   R_SPARC_WDISP30,      R_SPARC_WDISP22,
  39   R_SPARC_HI22,         R_SPARC_22,
  40   R_SPARC_13,           R_SPARC_LO10,
  41   R_SPARC_GOT10,        R_SPARC_GOT13,          R_SPARC_GOT22,
  42   R_SPARC_PC10,         R_SPARC_PC22,
  43   R_SPARC_WPLT30,
  44   R_SPARC_COPY,
  45   R_SPARC_GLOB_DAT,     R_SPARC_JMP_SLOT,
  46   R_SPARC_RELATIVE,
  47   R_SPARC_UA32,
  48   R_SPARC_max
  49 };
  50
  51 static reloc_howto_type nlm32_sparc_howto_table[] =
  52 {
  53   HOWTO (R_SPARC_NONE,    0,0, 0,FALSE,0,complain_overflow_dont,    0,"R_SPARC_NONE",    FALSE,0,0x00000000,TRUE),
  54   HOWTO (R_SPARC_8,       0,0, 8,FALSE,0,complain_overflow_bitfield,0,"R_SPARC_8",       FALSE,0,0x000000ff,TRUE),
  55   HOWTO (R_SPARC_16,      0,1,16,FALSE,0,complain_overflow_bitfield,0,"R_SPARC_16",      FALSE,0,0x0000ffff,TRUE),
  56   HOWTO (R_SPARC_32,      0,2,32,FALSE,0,complain_overflow_bitfield,0,"R_SPARC_32",      FALSE,0,0xffffffff,TRUE),
  57   HOWTO (R_SPARC_DISP8,   0,0, 8,TRUE, 0,complain_overflow_signed,  0,"R_SPARC_DISP8",   FALSE,0,0x000000ff,TRUE),
  58   HOWTO (R_SPARC_DISP16,  0,1,16,TRUE, 0,complain_overflow_signed,  0,"R_SPARC_DISP16",  FALSE,0,0x0000ffff,TRUE),
  59   HOWTO (R_SPARC_DISP32,  0,2,32,TRUE, 0,complain_overflow_signed,  0,"R_SPARC_DISP32",  FALSE,0,0x00ffffff,TRUE),
  60   HOWTO (R_SPARC_WDISP30, 2,2,30,TRUE, 0,complain_overflow_signed,  0,"R_SPARC_WDISP30", FALSE,0,0x3fffffff,TRUE),
  61   HOWTO (R_SPARC_WDISP22, 2,2,22,TRUE, 0,complain_overflow_signed,  0,"R_SPARC_WDISP22", FALSE,0,0x003fffff,TRUE),
  62   HOWTO (R_SPARC_HI22,   10,2,22,FALSE,0,complain_overflow_dont,    0,"R_SPARC_HI22",    FALSE,0,0x003fffff,TRUE),
  63   HOWTO (R_SPARC_22,      0,2,22,FALSE,0,complain_overflow_bitfield,0,"R_SPARC_22",      FALSE,0,0x003fffff,TRUE),
  64   HOWTO (R_SPARC_13,      0,2,13,FALSE,0,complain_overflow_bitfield,0,"R_SPARC_13",      FALSE,0,0x00001fff,TRUE),
  65   HOWTO (R_SPARC_LO10,    0,2,10,FALSE,0,complain_overflow_dont,    0,"R_SPARC_LO10",    FALSE,0,0x000003ff,TRUE),
  66   HOWTO (R_SPARC_GOT10,   0,2,10,FALSE,0,complain_overflow_bitfield,0,"R_SPARC_GOT10",   FALSE,0,0x000003ff,TRUE),
  67   HOWTO (R_SPARC_GOT13,   0,2,13,FALSE,0,complain_overflow_bitfield,0,"R_SPARC_GOT13",   FALSE,0,0x00001fff,TRUE),
  68   HOWTO (R_SPARC_GOT22,  10,2,22,FALSE,0,complain_overflow_bitfield,0,"R_SPARC_GOT22",   FALSE,0,0x003fffff,TRUE),
  69   HOWTO (R_SPARC_PC10,    0,2,10,FALSE,0,complain_overflow_bitfield,0,"R_SPARC_PC10",    FALSE,0,0x000003ff,TRUE),
  70   HOWTO (R_SPARC_PC22,    0,2,22,FALSE,0,complain_overflow_bitfield,0,"R_SPARC_PC22",    FALSE,0,0x003fffff,TRUE),
  71   HOWTO (R_SPARC_WPLT30,  0,0,00,FALSE,0,complain_overflow_dont,    0,"R_SPARC_WPLT30",  FALSE,0,0x00000000,TRUE),
  72   HOWTO (R_SPARC_COPY,    0,0,00,FALSE,0,complain_overflow_dont,    0,"R_SPARC_COPY",    FALSE,0,0x00000000,TRUE),
  73   HOWTO (R_SPARC_GLOB_DAT,0,0,00,FALSE,0,complain_overflow_dont,    0,"R_SPARC_GLOB_DAT",FALSE,0,0x00000000,TRUE),
  74   HOWTO (R_SPARC_JMP_SLOT,0,0,00,FALSE,0,complain_overflow_dont,    0,"R_SPARC_JMP_SLOT",FALSE,0,0x00000000,TRUE),
  75   HOWTO (R_SPARC_RELATIVE,0,0,00,FALSE,0,complain_overflow_dont,    0,"R_SPARC_RELATIVE",FALSE,0,0x00000000,TRUE),
  76   HOWTO (R_SPARC_UA32,    0,0,00,FALSE,0,complain_overflow_dont,    0,"R_SPARC_UA32",    FALSE,0,0x00000000,TRUE),
  77 };
  78
  79 /* Read a NetWare sparc reloc.  */
  80
  81 struct nlm32_sparc_reloc_ext
  82 {
  83   unsigned char offset[4];
  84   unsigned char addend[4];
  85   unsigned char type[1];
  86   unsigned char pad1[3];
  87 };
  88
  89 static bfd_boolean
  90 nlm_sparc_read_reloc (bfd *abfd,
  91                       nlmNAME (symbol_type) *sym ATTRIBUTE_UNUSED,
  92                       asection **secp,
  93                       arelent *rel)
  94 {
  95   bfd_vma val, addend;
  96   unsigned int howto_index;
  97   unsigned int type;
  98   struct nlm32_sparc_reloc_ext tmp_reloc;
  99   asection *code_sec, *data_sec;
 100
 101   if (bfd_bread (&tmp_reloc, (bfd_size_type) 12, abfd) != 12)
 102     return FALSE;
 103
 104   code_sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME);
 105   data_sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME);
 106
 107   *secp = code_sec;
 108
 109   val = bfd_get_32 (abfd, tmp_reloc.offset);
 110   addend = bfd_get_32 (abfd, tmp_reloc.addend);
 111   type = bfd_get_8 (abfd, tmp_reloc.type);
 112
 113   rel->address = val;
 114   rel->addend = addend;
 115   rel->howto = NULL;
 116
 117   for (howto_index = 0;
 118        howto_index < sizeof (nlm32_sparc_howto_table) / sizeof (reloc_howto_type);
 119        howto_index++)
 120     if (nlm32_sparc_howto_table[howto_index].type == type)
 121       {
 122         rel->howto = &nlm32_sparc_howto_table[howto_index];
 123         break;
 124       }
 125
 126 #ifdef DEBUG
 127   fprintf (stderr, "%s:  address = %08lx, addend = %08lx, type = %u, howto = %p\n",
 128            __FUNCTION__, (unsigned long) rel->address,
 129            (unsigned long) rel->addend, type, rel->howto);
 130 #endif
 131   return TRUE;
 132
 133 }
 134
 135 /* Write a NetWare sparc reloc.  */
 136
 137 static bfd_boolean
 138 nlm_sparc_write_reloc (bfd * abfd, asection * sec, arelent * rel)
 139 {
 140   bfd_vma val;
 141   struct nlm32_sparc_reloc_ext tmp_reloc;
 142   unsigned int howto_index;
 143   int type = -1;
 144   reloc_howto_type *tmp;
 145
 146   for (howto_index = 0;
 147        howto_index < sizeof (nlm32_sparc_howto_table) / sizeof (reloc_howto_type);
 148        howto_index++)
 149     {
 150       tmp = &nlm32_sparc_howto_table[howto_index];
 151
 152       if (tmp->rightshift == rel->howto->rightshift
 153           && tmp->size == rel->howto->size
 154           && tmp->bitsize == rel->howto->bitsize
 155           && tmp->pc_relative == rel->howto->pc_relative
 156           && tmp->bitpos == rel->howto->bitpos
 157           && tmp->src_mask == rel->howto->src_mask
 158           && tmp->dst_mask == rel->howto->dst_mask)
 159         {
 160           type = tmp->type;
 161           break;
 162         }
 163     }
 164   if (type == -1)
 165     abort ();
 166
 167   /* Netware wants a list of relocs for each address.
 168      Format is:
 169         long    offset
 170         long    addend
 171         char    type
 172      That should be it.  */
 173
 174   /* The value we write out is the offset into the appropriate
 175      segment.  This offset is the section vma, adjusted by the vma of
 176      the lowest section in that segment, plus the address of the
 177      relocation.  */
 178   val = bfd_get_section_vma (abfd, sec) + rel->address;
 179
 180 #ifdef DEBUG
 181   fprintf (stderr, "%s:  val = %08lx, addend = %08lx, type = %u\n",
 182            __FUNCTION__, (unsigned long) val, (unsigned long) rel->addend,
 183            rel->howto->type);
 184 #endif
 185   bfd_put_32 (abfd, val, tmp_reloc.offset);
 186   bfd_put_32 (abfd, rel->addend, tmp_reloc.addend);
 187   bfd_put_8 (abfd, (short) (rel->howto->type), tmp_reloc.type);
 188
 189   if (bfd_bwrite (&tmp_reloc, (bfd_size_type) 12, abfd) != 12)
 190     return FALSE;
 191
 192   return TRUE;
 193 }
 194
 195 /* Mangle relocs for SPARC NetWare.  We can just use the standard
 196    SPARC relocs.  */
 197
 198 static bfd_boolean
 199 nlm_sparc_mangle_relocs (bfd *abfd ATTRIBUTE_UNUSED,
 200                          asection *sec ATTRIBUTE_UNUSED,
 201                          const void * data ATTRIBUTE_UNUSED,
 202                          bfd_vma offset ATTRIBUTE_UNUSED,
 203                          bfd_size_type count ATTRIBUTE_UNUSED)
 204 {
 205   return TRUE;
 206 }
 207
 208 /* Read a NetWare sparc import record.  */
 209
 210 static bfd_boolean
 211 nlm_sparc_read_import (bfd *abfd, nlmNAME (symbol_type) *sym)
 212 {
 213   struct nlm_relent *nlm_relocs;        /* Relocation records for symbol.  */
 214   bfd_size_type rcount;                 /* Number of relocs.  */
 215   bfd_byte temp[NLM_TARGET_LONG_SIZE];  /* Temporary 32-bit value.  */
 216   unsigned char symlength;              /* Length of symbol name.  */
 217   char *name;
 218
 219   /* First, read in the number of relocation
 220      entries for this symbol.  */
 221   if (bfd_bread (temp, (bfd_size_type) 4, abfd) != 4)
 222     return FALSE;
 223
 224   rcount = bfd_get_32 (abfd, temp);
 225
 226   /* Next, read in the length of the symbol.  */
 227   if (bfd_bread (& symlength, (bfd_size_type) sizeof (symlength), abfd)
 228       != sizeof (symlength))
 229     return FALSE;
 230   sym -> symbol.the_bfd = abfd;
 231   name = bfd_alloc (abfd, (bfd_size_type) symlength + 1);
 232   if (name == NULL)
 233     return FALSE;
 234
 235   /* Then read in the symbol.  */
 236   if (bfd_bread (name, (bfd_size_type) symlength, abfd) != symlength)
 237     return FALSE;
 238   name[symlength] = '\0';
 239   sym -> symbol.name = name;
 240   sym -> symbol.flags = 0;
 241   sym -> symbol.value = 0;
 242   sym -> symbol.section = bfd_und_section_ptr;
 243
 244   /* Next, start reading in the relocs.  */
 245   nlm_relocs = bfd_alloc (abfd, rcount * sizeof (struct nlm_relent));
 246   if (!nlm_relocs)
 247     return FALSE;
 248   sym -> relocs = nlm_relocs;
 249   sym -> rcnt = 0;
 250   while (sym -> rcnt < rcount)
 251     {
 252       asection *section;
 253
 254       if (! nlm_sparc_read_reloc (abfd, sym, &section, &nlm_relocs -> reloc))
 255         return FALSE;
 256       nlm_relocs -> section = section;
 257       nlm_relocs++;
 258       sym -> rcnt++;
 259     }
 260
 261   return TRUE;
 262 }
 263
 264 static bfd_boolean
 265 nlm_sparc_write_import (bfd * abfd, asection * sec, arelent * rel)
 266 {
 267   char temp[4];
 268   asection *code, *data, *bss, *symsec;
 269   bfd_vma base;
 270
 271   code = bfd_get_section_by_name (abfd, NLM_CODE_NAME);
 272   data = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME);
 273   bss = bfd_get_section_by_name (abfd, NLM_UNINITIALIZED_DATA_NAME);
 274   symsec = (*rel->sym_ptr_ptr)->section;
 275
 276   if (symsec == code)
 277     base = 0;
 278   else if (symsec == data)
 279     base = code->size;
 280   else if (symsec == bss)
 281     base = code->size + data->size;
 282   else
 283     base = 0;
 284
 285 #ifdef DEBUG
 286   fprintf (stderr, "%s:  <%lx, 1>\n\t",
 287            __FUNCTION__, (unsigned long) (base + (*rel->sym_ptr_ptr)->value));
 288 #endif
 289   bfd_put_32 (abfd, base + (*rel->sym_ptr_ptr)->value, temp);
 290   if (bfd_bwrite (temp, (bfd_size_type) 4, abfd) != 4)
 291     return FALSE;
 292   bfd_put_32 (abfd, (bfd_vma) 1, temp);
 293   if (bfd_bwrite (temp, (bfd_size_type) 4, abfd) != 4)
 294     return FALSE;
 295   if (! nlm_sparc_write_reloc (abfd, sec, rel))
 296     return FALSE;
 297   return TRUE;
 298 }
 299
 300 /* Write out an external reference.  */
 301
 302 static bfd_boolean
 303 nlm_sparc_write_external (bfd *abfd,
 304                           bfd_size_type count,
 305                           asymbol *sym,
 306                           struct reloc_and_sec *relocs)
 307 {
 308   unsigned int i;
 309   bfd_byte len;
 310   unsigned char temp[NLM_TARGET_LONG_SIZE];
 311
 312   bfd_put_32 (abfd, count, temp);
 313   if (bfd_bwrite (temp, (bfd_size_type) sizeof (temp), abfd) != sizeof (temp))
 314     return FALSE;
 315
 316   len = strlen (sym->name);
 317   if ((bfd_bwrite (&len, (bfd_size_type) sizeof (bfd_byte), abfd)
 318        != sizeof (bfd_byte))
 319       || bfd_bwrite (sym->name, (bfd_size_type) len, abfd) != len)
 320     return FALSE;
 321
 322   for (i = 0; i < count; i++)
 323     if (! nlm_sparc_write_reloc (abfd, relocs[i].sec, relocs[i].rel))
 324       return FALSE;
 325
 326   return TRUE;
 327 }
 328
 329 static bfd_boolean
 330 nlm_sparc_write_export (bfd * abfd, asymbol * sym, bfd_vma value)
 331 {
 332   bfd_byte len;
 333   bfd_byte temp[4];
 334
 335 #ifdef DEBUG
 336   fprintf (stderr, "%s: <%lx, %u, %s>\n",
 337            __FUNCTION__, (unsigned long) value, strlen (sym->name), sym->name);
 338 #endif
 339   bfd_put_32 (abfd, value, temp);
 340   len = strlen (sym->name);
 341
 342   if (bfd_bwrite (temp, (bfd_size_type) 4, abfd) != 4
 343       || bfd_bwrite (&len, (bfd_size_type) 1, abfd) != 1
 344       || bfd_bwrite (sym->name, (bfd_size_type) len, abfd) != len)
 345     return FALSE;
 346
 347   return TRUE;
 348 }
 349
 350 #undef nlm_swap_fixed_header_in
 351 #undef nlm_swap_fixed_header_out
 352
 353 #include "nlmswap.h"
 354
 355 static const struct nlm_backend_data nlm32_sparc_backend =
 356 {
 357   "NetWare SPARC Module   \032",
 358   sizeof (Nlm32_sparc_External_Fixed_Header),
 359   0,    /* Optional_prefix_size.  */
 360   bfd_arch_sparc,
 361   0,
 362   FALSE,
 363   0,    /* Backend_object_p.  */
 364   0,    /* Write_prefix_func.  */
 365   nlm_sparc_read_reloc,
 366   nlm_sparc_mangle_relocs,
 367   nlm_sparc_read_import,
 368   nlm_sparc_write_import,
 369   0,    /* Set_public_section.  */
 370   0,    /* Get_public_offset.  */
 371   nlm_swap_fixed_header_in,
 372   nlm_swap_fixed_header_out,
 373   nlm_sparc_write_external,
 374   nlm_sparc_write_export
 375 };
 376
 377 #define TARGET_BIG_NAME         "nlm32-sparc"
 378 #define TARGET_BIG_SYM          nlmNAME (sparc_vec)
 379 #define TARGET_BACKEND_DATA     & nlm32_sparc_backend
 380
 381 #include "nlm-target.h"