bfd/coff-sparc.c

   1 /* BFD back-end for Sparc COFF files.
   2    Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1999, 2000, 2001,
   3    2002, 2003, 2005, 2007 Free Software Foundation, Inc.
   4    Written by Cygnus Support.
   5
   6    This file is part of BFD, the Binary File Descriptor library.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  21    MA 02110-1301, USA.  */
  22
  23 #include "sysdep.h"
  24 #include "bfd.h"
  25 #include "libbfd.h"
  26 #include "coff/sparc.h"
  27 #include "coff/internal.h"
  28 #include "libcoff.h"
  29
  30 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (3)
  31
  32 #define BADMAG(x) ((x).f_magic != SPARCMAGIC && (x).f_magic != LYNXCOFFMAGIC)
  33
  34 /* The page size is a guess based on ELF.  */
  35 #define COFF_PAGE_SIZE 0x10000
  36
  37
  38 static reloc_howto_type *coff_sparc_reloc_type_lookup
  39   PARAMS ((bfd *, bfd_reloc_code_real_type));
  40 static void rtype2howto PARAMS ((arelent *, struct internal_reloc *));
  41
  42 enum reloc_type
  43   {
  44     R_SPARC_NONE = 0,
  45     R_SPARC_8,          R_SPARC_16,             R_SPARC_32,
  46     R_SPARC_DISP8,      R_SPARC_DISP16,         R_SPARC_DISP32,
  47     R_SPARC_WDISP30,    R_SPARC_WDISP22,
  48     R_SPARC_HI22,       R_SPARC_22,
  49     R_SPARC_13,         R_SPARC_LO10,
  50     R_SPARC_GOT10,      R_SPARC_GOT13,          R_SPARC_GOT22,
  51     R_SPARC_PC10,       R_SPARC_PC22,
  52     R_SPARC_WPLT30,
  53     R_SPARC_COPY,
  54     R_SPARC_GLOB_DAT,   R_SPARC_JMP_SLOT,
  55     R_SPARC_RELATIVE,
  56     R_SPARC_UA32,
  57     R_SPARC_max
  58   };
  59
  60 /* This is stolen pretty directly from elf.c.  */
  61 static bfd_reloc_status_type
  62 bfd_coff_generic_reloc PARAMS ((bfd *, arelent *, asymbol *, PTR,
  63                                 asection *, bfd *, char **));
  64
  65 static bfd_reloc_status_type
  66 bfd_coff_generic_reloc (abfd, reloc_entry, symbol, data, input_section,
  67                         output_bfd, error_message)
  68      bfd *abfd ATTRIBUTE_UNUSED;
  69      arelent *reloc_entry;
  70      asymbol *symbol;
  71      PTR data ATTRIBUTE_UNUSED;
  72      asection *input_section;
  73      bfd *output_bfd;
  74      char **error_message ATTRIBUTE_UNUSED;
  75 {
  76   if (output_bfd != (bfd *) NULL
  77       && (symbol->flags & BSF_SECTION_SYM) == 0)
  78     {
  79       reloc_entry->address += input_section->output_offset;
  80       return bfd_reloc_ok;
  81     }
  82
  83   return bfd_reloc_continue;
  84 }
  85
  86 static reloc_howto_type coff_sparc_howto_table[] =
  87 {
  88   HOWTO(R_SPARC_NONE,    0,0, 0,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_NONE",    FALSE,0,0x00000000,TRUE),
  89   HOWTO(R_SPARC_8,       0,0, 8,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_8",       FALSE,0,0x000000ff,TRUE),
  90   HOWTO(R_SPARC_16,      0,1,16,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_16",      FALSE,0,0x0000ffff,TRUE),
  91   HOWTO(R_SPARC_32,      0,2,32,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_32",      FALSE,0,0xffffffff,TRUE),
  92   HOWTO(R_SPARC_DISP8,   0,0, 8,TRUE, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_DISP8",   FALSE,0,0x000000ff,TRUE),
  93   HOWTO(R_SPARC_DISP16,  0,1,16,TRUE, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_DISP16",  FALSE,0,0x0000ffff,TRUE),
  94   HOWTO(R_SPARC_DISP32,  0,2,32,TRUE, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_DISP32",  FALSE,0,0x00ffffff,TRUE),
  95   HOWTO(R_SPARC_WDISP30, 2,2,30,TRUE, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_WDISP30", FALSE,0,0x3fffffff,TRUE),
  96   HOWTO(R_SPARC_WDISP22, 2,2,22,TRUE, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_WDISP22", FALSE,0,0x003fffff,TRUE),
  97   HOWTO(R_SPARC_HI22,   10,2,22,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_HI22",    FALSE,0,0x003fffff,TRUE),
  98   HOWTO(R_SPARC_22,      0,2,22,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_22",      FALSE,0,0x003fffff,TRUE),
  99   HOWTO(R_SPARC_13,      0,2,13,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_13",      FALSE,0,0x00001fff,TRUE),
 100   HOWTO(R_SPARC_LO10,    0,2,10,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_LO10",    FALSE,0,0x000003ff,TRUE),
 101   HOWTO(R_SPARC_GOT10,   0,2,10,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_GOT10",   FALSE,0,0x000003ff,TRUE),
 102   HOWTO(R_SPARC_GOT13,   0,2,13,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_GOT13",   FALSE,0,0x00001fff,TRUE),
 103   HOWTO(R_SPARC_GOT22,  10,2,22,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_GOT22",   FALSE,0,0x003fffff,TRUE),
 104   HOWTO(R_SPARC_PC10,    0,2,10,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_PC10",    FALSE,0,0x000003ff,TRUE),
 105   HOWTO(R_SPARC_PC22,    0,2,22,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_PC22",    FALSE,0,0x003fffff,TRUE),
 106   HOWTO(R_SPARC_WPLT30,  0,0,00,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_WPLT30",  FALSE,0,0x00000000,TRUE),
 107   HOWTO(R_SPARC_COPY,    0,0,00,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_COPY",    FALSE,0,0x00000000,TRUE),
 108   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),
 109   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),
 110   HOWTO(R_SPARC_RELATIVE,0,0,00,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_RELATIVE",FALSE,0,0x00000000,TRUE),
 111   HOWTO(R_SPARC_UA32,    0,0,00,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_UA32",    FALSE,0,0x00000000,TRUE),
 112 };
 113
 114 struct coff_reloc_map {
 115   bfd_reloc_code_real_type bfd_reloc_val;
 116   unsigned char coff_reloc_val;
 117 };
 118
 119 static const struct coff_reloc_map sparc_reloc_map[] =
 120 {
 121   { BFD_RELOC_NONE, R_SPARC_NONE, },
 122   { BFD_RELOC_16, R_SPARC_16, },
 123   { BFD_RELOC_8, R_SPARC_8 },
 124   { BFD_RELOC_8_PCREL, R_SPARC_DISP8 },
 125   { BFD_RELOC_CTOR, R_SPARC_32 }, /* @@ Assumes 32 bits.  */
 126   { BFD_RELOC_32, R_SPARC_32 },
 127   { BFD_RELOC_32_PCREL, R_SPARC_DISP32 },
 128   { BFD_RELOC_HI22, R_SPARC_HI22 },
 129   { BFD_RELOC_LO10, R_SPARC_LO10, },
 130   { BFD_RELOC_32_PCREL_S2, R_SPARC_WDISP30 },
 131   { BFD_RELOC_SPARC22, R_SPARC_22 },
 132   { BFD_RELOC_SPARC13, R_SPARC_13 },
 133   { BFD_RELOC_SPARC_GOT10, R_SPARC_GOT10 },
 134   { BFD_RELOC_SPARC_GOT13, R_SPARC_GOT13 },
 135   { BFD_RELOC_SPARC_GOT22, R_SPARC_GOT22 },
 136   { BFD_RELOC_SPARC_PC10, R_SPARC_PC10 },
 137   { BFD_RELOC_SPARC_PC22, R_SPARC_PC22 },
 138   { BFD_RELOC_SPARC_WPLT30, R_SPARC_WPLT30 },
 139   { BFD_RELOC_SPARC_COPY, R_SPARC_COPY },
 140   { BFD_RELOC_SPARC_GLOB_DAT, R_SPARC_GLOB_DAT },
 141   { BFD_RELOC_SPARC_JMP_SLOT, R_SPARC_JMP_SLOT },
 142   { BFD_RELOC_SPARC_RELATIVE, R_SPARC_RELATIVE },
 143   { BFD_RELOC_SPARC_WDISP22, R_SPARC_WDISP22 },
 144   /*  { BFD_RELOC_SPARC_UA32, R_SPARC_UA32 }, not used?? */
 145 };
 146
 147 static reloc_howto_type *
 148 coff_sparc_reloc_type_lookup (abfd, code)
 149      bfd *abfd ATTRIBUTE_UNUSED;
 150      bfd_reloc_code_real_type code;
 151 {
 152   unsigned int i;
 153   for (i = 0; i < sizeof (sparc_reloc_map) / sizeof (struct coff_reloc_map); i++)
 154     {
 155       if (sparc_reloc_map[i].bfd_reloc_val == code)
 156         return &coff_sparc_howto_table[(int) sparc_reloc_map[i].coff_reloc_val];
 157     }
 158   return 0;
 159 }
 160 #define coff_bfd_reloc_type_lookup      coff_sparc_reloc_type_lookup
 161
 162 static reloc_howto_type *
 163 coff_sparc_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
 164                               const char *r_name)
 165 {
 166   unsigned int i;
 167
 168   for (i = 0;
 169        i < (sizeof (coff_sparc_howto_table)
 170             / sizeof (coff_sparc_howto_table[0]));
 171        i++)
 172     if (coff_sparc_howto_table[i].name != NULL
 173         && strcasecmp (coff_sparc_howto_table[i].name, r_name) == 0)
 174       return &coff_sparc_howto_table[i];
 175
 176   return NULL;
 177 }
 178 #define coff_bfd_reloc_name_lookup coff_sparc_reloc_name_lookup
 179
 180 static void
 181 rtype2howto (cache_ptr, dst)
 182      arelent *cache_ptr;
 183      struct internal_reloc *dst;
 184 {
 185   BFD_ASSERT (dst->r_type < (unsigned int) R_SPARC_max);
 186   cache_ptr->howto = &coff_sparc_howto_table[dst->r_type];
 187 }
 188
 189 #define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry)
 190
 191 #define SWAP_IN_RELOC_OFFSET    H_GET_32
 192 #define SWAP_OUT_RELOC_OFFSET   H_PUT_32
 193 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
 194   cache_ptr->addend = reloc.r_offset;
 195
 196 /* Clear the r_spare field in relocs.  */
 197 #define SWAP_OUT_RELOC_EXTRA(abfd,src,dst) \
 198   do { \
 199        dst->r_spare[0] = 0; \
 200        dst->r_spare[1] = 0; \
 201      } while (0)
 202
 203 #define __A_MAGIC_SET__
 204
 205 /* Enable Sparc-specific hacks in coffcode.h.  */
 206
 207 #define COFF_SPARC
 208
 209 #include "coffcode.h"
 210
 211 #ifndef TARGET_SYM
 212 #define TARGET_SYM sparccoff_vec
 213 #endif
 214
 215 #ifndef TARGET_NAME
 216 #define TARGET_NAME "coff-sparc"
 217 #endif
 218
 219 CREATE_BIG_COFF_TARGET_VEC (TARGET_SYM, TARGET_NAME, D_PAGED, 0, '_', NULL, COFF_SWAP_TABLE)