gnu/dist/gdb6/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 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 2 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, MA 02110-1301, USA.  */
  21
  22 #include "bfd.h"
  23 #include "sysdep.h"
  24 #include "libbfd.h"
  25 #include "coff/sparc.h"
  26 #include "coff/internal.h"
  27 #include "libcoff.h"
  28
  29 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (3)
  30
  31 #define BADMAG(x) ((x).f_magic != SPARCMAGIC && (x).f_magic != LYNXCOFFMAGIC)
  32
  33 /* The page size is a guess based on ELF.  */
  34 #define COFF_PAGE_SIZE 0x10000
  35
  36
  37 static reloc_howto_type *coff_sparc_reloc_type_lookup
  38   PARAMS ((bfd *, bfd_reloc_code_real_type));
  39 static void rtype2howto PARAMS ((arelent *, struct internal_reloc *));
  40
  41 enum reloc_type
  42   {
  43     R_SPARC_NONE = 0,
  44     R_SPARC_8,          R_SPARC_16,             R_SPARC_32,
  45     R_SPARC_DISP8,      R_SPARC_DISP16,         R_SPARC_DISP32,
  46     R_SPARC_WDISP30,    R_SPARC_WDISP22,
  47     R_SPARC_HI22,       R_SPARC_22,
  48     R_SPARC_13,         R_SPARC_LO10,
  49     R_SPARC_GOT10,      R_SPARC_GOT13,          R_SPARC_GOT22,
  50     R_SPARC_PC10,       R_SPARC_PC22,
  51     R_SPARC_WPLT30,
  52     R_SPARC_COPY,
  53     R_SPARC_GLOB_DAT,   R_SPARC_JMP_SLOT,
  54     R_SPARC_RELATIVE,
  55     R_SPARC_UA32,
  56     R_SPARC_max
  57   };
  58
  59 /* This is stolen pretty directly from elf.c.  */
  60 static bfd_reloc_status_type
  61 bfd_coff_generic_reloc PARAMS ((bfd *, arelent *, asymbol *, PTR,
  62                                 asection *, bfd *, char **));
  63
  64 static bfd_reloc_status_type
  65 bfd_coff_generic_reloc (abfd, reloc_entry, symbol, data, input_section,
  66                         output_bfd, error_message)
  67      bfd *abfd ATTRIBUTE_UNUSED;
  68      arelent *reloc_entry;
  69      asymbol *symbol;
  70      PTR data ATTRIBUTE_UNUSED;
  71      asection *input_section;
  72      bfd *output_bfd;
  73      char **error_message ATTRIBUTE_UNUSED;
  74 {
  75   if (output_bfd != (bfd *) NULL
  76       && (symbol->flags & BSF_SECTION_SYM) == 0)
  77     {
  78       reloc_entry->address += input_section->output_offset;
  79       return bfd_reloc_ok;
  80     }
  81
  82   return bfd_reloc_continue;
  83 }
  84
  85 static reloc_howto_type coff_sparc_howto_table[] =
  86 {
  87   HOWTO(R_SPARC_NONE,    0,0, 0,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_NONE",    FALSE,0,0x00000000,TRUE),
  88   HOWTO(R_SPARC_8,       0,0, 8,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_8",       FALSE,0,0x000000ff,TRUE),
  89   HOWTO(R_SPARC_16,      0,1,16,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_16",      FALSE,0,0x0000ffff,TRUE),
  90   HOWTO(R_SPARC_32,      0,2,32,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_32",      FALSE,0,0xffffffff,TRUE),
  91   HOWTO(R_SPARC_DISP8,   0,0, 8,TRUE, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_DISP8",   FALSE,0,0x000000ff,TRUE),
  92   HOWTO(R_SPARC_DISP16,  0,1,16,TRUE, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_DISP16",  FALSE,0,0x0000ffff,TRUE),
  93   HOWTO(R_SPARC_DISP32,  0,2,32,TRUE, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_DISP32",  FALSE,0,0x00ffffff,TRUE),
  94   HOWTO(R_SPARC_WDISP30, 2,2,30,TRUE, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_WDISP30", FALSE,0,0x3fffffff,TRUE),
  95   HOWTO(R_SPARC_WDISP22, 2,2,22,TRUE, 0,complain_overflow_signed,  bfd_coff_generic_reloc,"R_SPARC_WDISP22", FALSE,0,0x003fffff,TRUE),
  96   HOWTO(R_SPARC_HI22,   10,2,22,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_HI22",    FALSE,0,0x003fffff,TRUE),
  97   HOWTO(R_SPARC_22,      0,2,22,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_22",      FALSE,0,0x003fffff,TRUE),
  98   HOWTO(R_SPARC_13,      0,2,13,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_13",      FALSE,0,0x00001fff,TRUE),
  99   HOWTO(R_SPARC_LO10,    0,2,10,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_LO10",    FALSE,0,0x000003ff,TRUE),
 100   HOWTO(R_SPARC_GOT10,   0,2,10,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_GOT10",   FALSE,0,0x000003ff,TRUE),
 101   HOWTO(R_SPARC_GOT13,   0,2,13,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_GOT13",   FALSE,0,0x00001fff,TRUE),
 102   HOWTO(R_SPARC_GOT22,  10,2,22,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_GOT22",   FALSE,0,0x003fffff,TRUE),
 103   HOWTO(R_SPARC_PC10,    0,2,10,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_PC10",    FALSE,0,0x000003ff,TRUE),
 104   HOWTO(R_SPARC_PC22,    0,2,22,FALSE,0,complain_overflow_bitfield,bfd_coff_generic_reloc,"R_SPARC_PC22",    FALSE,0,0x003fffff,TRUE),
 105   HOWTO(R_SPARC_WPLT30,  0,0,00,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_WPLT30",  FALSE,0,0x00000000,TRUE),
 106   HOWTO(R_SPARC_COPY,    0,0,00,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_COPY",    FALSE,0,0x00000000,TRUE),
 107   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),
 108   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),
 109   HOWTO(R_SPARC_RELATIVE,0,0,00,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_RELATIVE",FALSE,0,0x00000000,TRUE),
 110   HOWTO(R_SPARC_UA32,    0,0,00,FALSE,0,complain_overflow_dont,    bfd_coff_generic_reloc,"R_SPARC_UA32",    FALSE,0,0x00000000,TRUE),
 111 };
 112
 113 struct coff_reloc_map {
 114   bfd_reloc_code_real_type bfd_reloc_val;
 115   unsigned char coff_reloc_val;
 116 };
 117
 118 static const struct coff_reloc_map sparc_reloc_map[] =
 119 {
 120   { BFD_RELOC_NONE, R_SPARC_NONE, },
 121   { BFD_RELOC_16, R_SPARC_16, },
 122   { BFD_RELOC_8, R_SPARC_8 },
 123   { BFD_RELOC_8_PCREL, R_SPARC_DISP8 },
 124   { BFD_RELOC_CTOR, R_SPARC_32 }, /* @@ Assumes 32 bits.  */
 125   { BFD_RELOC_32, R_SPARC_32 },
 126   { BFD_RELOC_32_PCREL, R_SPARC_DISP32 },
 127   { BFD_RELOC_HI22, R_SPARC_HI22 },
 128   { BFD_RELOC_LO10, R_SPARC_LO10, },
 129   { BFD_RELOC_32_PCREL_S2, R_SPARC_WDISP30 },
 130   { BFD_RELOC_SPARC22, R_SPARC_22 },
 131   { BFD_RELOC_SPARC13, R_SPARC_13 },
 132   { BFD_RELOC_SPARC_GOT10, R_SPARC_GOT10 },
 133   { BFD_RELOC_SPARC_GOT13, R_SPARC_GOT13 },
 134   { BFD_RELOC_SPARC_GOT22, R_SPARC_GOT22 },
 135   { BFD_RELOC_SPARC_PC10, R_SPARC_PC10 },
 136   { BFD_RELOC_SPARC_PC22, R_SPARC_PC22 },
 137   { BFD_RELOC_SPARC_WPLT30, R_SPARC_WPLT30 },
 138   { BFD_RELOC_SPARC_COPY, R_SPARC_COPY },
 139   { BFD_RELOC_SPARC_GLOB_DAT, R_SPARC_GLOB_DAT },
 140   { BFD_RELOC_SPARC_JMP_SLOT, R_SPARC_JMP_SLOT },
 141   { BFD_RELOC_SPARC_RELATIVE, R_SPARC_RELATIVE },
 142   { BFD_RELOC_SPARC_WDISP22, R_SPARC_WDISP22 },
 143   /*  { BFD_RELOC_SPARC_UA32, R_SPARC_UA32 }, not used?? */
 144 };
 145
 146 static reloc_howto_type *
 147 coff_sparc_reloc_type_lookup (abfd, code)
 148      bfd *abfd ATTRIBUTE_UNUSED;
 149      bfd_reloc_code_real_type code;
 150 {
 151   unsigned int i;
 152   for (i = 0; i < sizeof (sparc_reloc_map) / sizeof (struct coff_reloc_map); i++)
 153     {
 154       if (sparc_reloc_map[i].bfd_reloc_val == code)
 155         return &coff_sparc_howto_table[(int) sparc_reloc_map[i].coff_reloc_val];
 156     }
 157   return 0;
 158 }
 159 #define coff_bfd_reloc_type_lookup      coff_sparc_reloc_type_lookup
 160
 161 static void
 162 rtype2howto (cache_ptr, dst)
 163      arelent *cache_ptr;
 164      struct internal_reloc *dst;
 165 {
 166   BFD_ASSERT (dst->r_type < (unsigned int) R_SPARC_max);
 167   cache_ptr->howto = &coff_sparc_howto_table[dst->r_type];
 168 }
 169
 170 #define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry)
 171
 172 #define SWAP_IN_RELOC_OFFSET    H_GET_32
 173 #define SWAP_OUT_RELOC_OFFSET   H_PUT_32
 174 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
 175   cache_ptr->addend = reloc.r_offset;
 176
 177 /* Clear the r_spare field in relocs.  */
 178 #define SWAP_OUT_RELOC_EXTRA(abfd,src,dst) \
 179   do { \
 180        dst->r_spare[0] = 0; \
 181        dst->r_spare[1] = 0; \
 182      } while (0)
 183
 184 #define __A_MAGIC_SET__
 185
 186 /* Enable Sparc-specific hacks in coffcode.h.  */
 187
 188 #define COFF_SPARC
 189
 190 #include "coffcode.h"
 191
 192 #ifndef TARGET_SYM
 193 #define TARGET_SYM sparccoff_vec
 194 #endif
 195
 196 #ifndef TARGET_NAME
 197 #define TARGET_NAME "coff-sparc"
 198 #endif
 199
 200 CREATE_BIG_COFF_TARGET_VEC (TARGET_SYM, TARGET_NAME, D_PAGED, 0, '_', NULL, COFF_SWAP_TABLE)