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, 2008, 2012  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 enum reloc_type
  38   {
  39     R_SPARC_NONE = 0,
  40     R_SPARC_8,          R_SPARC_16,             R_SPARC_32,
  41     R_SPARC_DISP8,      R_SPARC_DISP16,         R_SPARC_DISP32,
  42     R_SPARC_WDISP30,    R_SPARC_WDISP22,
  43     R_SPARC_HI22,       R_SPARC_22,
  44     R_SPARC_13,         R_SPARC_LO10,
  45     R_SPARC_GOT10,      R_SPARC_GOT13,          R_SPARC_GOT22,
  46     R_SPARC_PC10,       R_SPARC_PC22,
  47     R_SPARC_WPLT30,
  48     R_SPARC_COPY,
  49     R_SPARC_GLOB_DAT,   R_SPARC_JMP_SLOT,
  50     R_SPARC_RELATIVE,
  51     R_SPARC_UA32,
  52     R_SPARC_max
  53   };
  54
  55 /* This is stolen pretty directly from elf.c.  */
  56
  57 static bfd_reloc_status_type
  58 bfd_coff_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
  59                         arelent *reloc_entry,
  60                         asymbol *symbol,
  61                         void * data ATTRIBUTE_UNUSED,
  62                         asection *input_section,
  63                         bfd *output_bfd,
  64                         char **error_message ATTRIBUTE_UNUSED)
  65 {
  66   if (output_bfd != (bfd *) NULL
  67       && (symbol->flags & BSF_SECTION_SYM) == 0)
  68     {
  69       reloc_entry->address += input_section->output_offset;
  70       return bfd_reloc_ok;
  71     }
  72
  73   return bfd_reloc_continue;
  74 }
  75
  76 static reloc_howto_type coff_sparc_howto_table[] =
  77 {
  78   HOWTO(R_SPARC_NONE,    0,0, 0,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_NONE",    FALSE,0,0x00000000,TRUE),
  79   HOWTO(R_SPARC_8,       0,0, 8,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_8",       FALSE,0,0x000000ff,TRUE),
  80   HOWTO(R_SPARC_16,      0,1,16,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_16",      FALSE,0,0x0000ffff,TRUE),
  81   HOWTO(R_SPARC_32,      0,2,32,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_32",      FALSE,0,0xffffffff,TRUE),
  82   HOWTO(R_SPARC_DISP8,   0,0, 8,TRUE, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_DISP8",   FALSE,0,0x000000ff,TRUE),
  83   HOWTO(R_SPARC_DISP16,  0,1,16,TRUE, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_DISP16",  FALSE,0,0x0000ffff,TRUE),
  84   HOWTO(R_SPARC_DISP32,  0,2,32,TRUE, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_DISP32",  FALSE,0,0x00ffffff,TRUE),
  85   HOWTO(R_SPARC_WDISP30, 2,2,30,TRUE, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_WDISP30", FALSE,0,0x3fffffff,TRUE),
  86   HOWTO(R_SPARC_WDISP22, 2,2,22,TRUE, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_WDISP22", FALSE,0,0x003fffff,TRUE),
  87   HOWTO(R_SPARC_HI22,   10,2,22,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_HI22",    FALSE,0,0x003fffff,TRUE),
  88   HOWTO(R_SPARC_22,      0,2,22,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_22",      FALSE,0,0x003fffff,TRUE),
  89   HOWTO(R_SPARC_13,      0,2,13,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_13",      FALSE,0,0x00001fff,TRUE),
  90   HOWTO(R_SPARC_LO10,    0,2,10,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_LO10",    FALSE,0,0x000003ff,TRUE),
  91   HOWTO(R_SPARC_GOT10,   0,2,10,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_GOT10",   FALSE,0,0x000003ff,TRUE),
  92   HOWTO(R_SPARC_GOT13,   0,2,13,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_GOT13",   FALSE,0,0x00001fff,TRUE),
  93   HOWTO(R_SPARC_GOT22,  10,2,22,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_GOT22",   FALSE,0,0x003fffff,TRUE),
  94   HOWTO(R_SPARC_PC10,    0,2,10,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_PC10",    FALSE,0,0x000003ff,TRUE),
  95   HOWTO(R_SPARC_PC22,    0,2,22,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_PC22",    FALSE,0,0x003fffff,TRUE),
  96   HOWTO(R_SPARC_WPLT30,  0,0,00,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_WPLT30",  FALSE,0,0x00000000,TRUE),
  97   HOWTO(R_SPARC_COPY,    0,0,00,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_COPY",    FALSE,0,0x00000000,TRUE),
  98   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),
  99   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),
 100   HOWTO(R_SPARC_RELATIVE,0,0,00,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_RELATIVE",FALSE,0,0x00000000,TRUE),
 101   HOWTO(R_SPARC_UA32,    0,0,00,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_UA32",    FALSE,0,0x00000000,TRUE),
 102 };
 103
 104 struct coff_reloc_map
 105 {
 106   bfd_reloc_code_real_type bfd_reloc_val;
 107   unsigned char coff_reloc_val;
 108 };
 109
 110 static const struct coff_reloc_map sparc_reloc_map[] =
 111 {
 112   { BFD_RELOC_NONE, R_SPARC_NONE, },
 113   { BFD_RELOC_16, R_SPARC_16, },
 114   { BFD_RELOC_8, R_SPARC_8 },
 115   { BFD_RELOC_8_PCREL, R_SPARC_DISP8 },
 116   { BFD_RELOC_CTOR, R_SPARC_32 }, /* @@ Assumes 32 bits.  */
 117   { BFD_RELOC_32, R_SPARC_32 },
 118   { BFD_RELOC_32_PCREL, R_SPARC_DISP32 },
 119   { BFD_RELOC_HI22, R_SPARC_HI22 },
 120   { BFD_RELOC_LO10, R_SPARC_LO10, },
 121   { BFD_RELOC_32_PCREL_S2, R_SPARC_WDISP30 },
 122   { BFD_RELOC_SPARC22, R_SPARC_22 },
 123   { BFD_RELOC_SPARC13, R_SPARC_13 },
 124   { BFD_RELOC_SPARC_GOT10, R_SPARC_GOT10 },
 125   { BFD_RELOC_SPARC_GOT13, R_SPARC_GOT13 },
 126   { BFD_RELOC_SPARC_GOT22, R_SPARC_GOT22 },
 127   { BFD_RELOC_SPARC_PC10, R_SPARC_PC10 },
 128   { BFD_RELOC_SPARC_PC22, R_SPARC_PC22 },
 129   { BFD_RELOC_SPARC_WPLT30, R_SPARC_WPLT30 },
 130   { BFD_RELOC_SPARC_COPY, R_SPARC_COPY },
 131   { BFD_RELOC_SPARC_GLOB_DAT, R_SPARC_GLOB_DAT },
 132   { BFD_RELOC_SPARC_JMP_SLOT, R_SPARC_JMP_SLOT },
 133   { BFD_RELOC_SPARC_RELATIVE, R_SPARC_RELATIVE },
 134   { BFD_RELOC_SPARC_WDISP22, R_SPARC_WDISP22 },
 135   /*  { BFD_RELOC_SPARC_UA32, R_SPARC_UA32 }, not used?? */
 136 };
 137
 138 static reloc_howto_type *
 139 coff_sparc_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
 140                               bfd_reloc_code_real_type code)
 141 {
 142   unsigned int i;
 143   for (i = 0; i < sizeof (sparc_reloc_map) / sizeof (struct coff_reloc_map); i++)
 144     {
 145       if (sparc_reloc_map[i].bfd_reloc_val == code)
 146         return &coff_sparc_howto_table[(int) sparc_reloc_map[i].coff_reloc_val];
 147     }
 148   return 0;
 149 }
 150 #define coff_bfd_reloc_type_lookup      coff_sparc_reloc_type_lookup
 151
 152 static reloc_howto_type *
 153 coff_sparc_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
 154                               const char *r_name)
 155 {
 156   unsigned int i;
 157
 158   for (i = 0;
 159        i < (sizeof (coff_sparc_howto_table)
 160             / sizeof (coff_sparc_howto_table[0]));
 161        i++)
 162     if (coff_sparc_howto_table[i].name != NULL
 163         && strcasecmp (coff_sparc_howto_table[i].name, r_name) == 0)
 164       return &coff_sparc_howto_table[i];
 165
 166   return NULL;
 167 }
 168 #define coff_bfd_reloc_name_lookup coff_sparc_reloc_name_lookup
 169
 170 static void
 171 rtype2howto (arelent *cache_ptr, struct internal_reloc *dst)
 172 {
 173   BFD_ASSERT (dst->r_type < (unsigned int) R_SPARC_max);
 174   cache_ptr->howto = &coff_sparc_howto_table[dst->r_type];
 175 }
 176
 177 #define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry)
 178
 179 #define SWAP_IN_RELOC_OFFSET    H_GET_32
 180 #define SWAP_OUT_RELOC_OFFSET   H_PUT_32
 181 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
 182   cache_ptr->addend = reloc.r_offset;
 183
 184 /* Clear the r_spare field in relocs.  */
 185 #define SWAP_OUT_RELOC_EXTRA(abfd,src,dst) \
 186   do { \
 187        dst->r_spare[0] = 0; \
 188        dst->r_spare[1] = 0; \
 189      } while (0)
 190
 191 #define __A_MAGIC_SET__
 192
 193 /* Enable Sparc-specific hacks in coffcode.h.  */
 194
 195 #define COFF_SPARC
 196
 197 #define bfd_pe_print_pdata      NULL
 198
 199 #include "coffcode.h"
 200
 201 #ifndef TARGET_SYM
 202 #define TARGET_SYM sparccoff_vec
 203 #endif
 204
 205 #ifndef TARGET_NAME
 206 #define TARGET_NAME "coff-sparc"
 207 #endif
 208
 209 CREATE_BIG_COFF_TARGET_VEC (TARGET_SYM, TARGET_NAME, D_PAGED, 0, '_', NULL, COFF_SWAP_TABLE)