bfd/libxcoff.h

   1 /* BFD XCOFF object file private structure.
   2    Copyright 2001, 2002 Free Software Foundation, Inc.
   3    Written by Tom Rix, Redhat.
   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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21 #ifndef LIBXCOFF_H
  22 #define LIBXCOFF_H
  23
  24 /* This is the backend information kept for XCOFF files.  This
  25    structure is constant for a particular backend.  The first element
  26    is the COFF backend data structure, so that XCOFF targets can use
  27    the generic COFF code.  */
  28
  29 struct xcoff_backend_data_rec
  30 {
  31   /* COFF backend information.  */
  32   bfd_coff_backend_data coff;
  33
  34   /* Magic number.  */
  35   unsigned short _xcoff_magic_number;
  36
  37   /* Architecture and machine for coff_set_arch_mach_hook.  */
  38   enum bfd_architecture _xcoff_architecture;
  39   long _xcoff_machine;
  40
  41   /* Function pointers to xcoff specific swap routines.  */
  42   void (* _xcoff_swap_ldhdr_in)
  43     PARAMS ((bfd *, const PTR, struct internal_ldhdr *));
  44   void (* _xcoff_swap_ldhdr_out)
  45     PARAMS ((bfd *, const struct internal_ldhdr *, PTR));
  46   void (* _xcoff_swap_ldsym_in)
  47     PARAMS ((bfd *, const PTR, struct internal_ldsym *));
  48   void (* _xcoff_swap_ldsym_out)
  49     PARAMS ((bfd *, const struct internal_ldsym *, PTR));
  50   void (* _xcoff_swap_ldrel_in)
  51     PARAMS ((bfd *, const PTR, struct internal_ldrel *));
  52   void (* _xcoff_swap_ldrel_out)
  53     PARAMS ((bfd *, const struct internal_ldrel *, PTR));
  54
  55   /* Size of the external struct.  */
  56   unsigned int _xcoff_ldhdrsz;
  57   unsigned int _xcoff_ldsymsz;
  58   unsigned int _xcoff_ldrelsz;
  59
  60   /* Size an entry in a descriptor section.  */
  61   unsigned int _xcoff_function_descriptor_size;
  62
  63   /* Size of the small aout file header.  */
  64   unsigned int _xcoff_small_aout_header_size;
  65
  66   /* Loader version
  67      1 : XCOFF32
  68      2 : XCOFF64.  */
  69   unsigned long _xcoff_ldhdr_version;
  70
  71   bfd_boolean (* _xcoff_put_symbol_name)
  72     PARAMS ((bfd *, struct bfd_strtab_hash *, struct internal_syment *,
  73              const char *));
  74
  75   bfd_boolean (* _xcoff_put_ldsymbol_name)
  76     PARAMS ((bfd *, struct xcoff_loader_info *, struct internal_ldsym *,
  77              const char *));
  78
  79   reloc_howto_type *_xcoff_dynamic_reloc;
  80
  81   asection * (* _xcoff_create_csect_from_smclas)
  82     PARAMS ((bfd *, union internal_auxent *, const char *));
  83
  84   /* Line number and relocation overflow.
  85      XCOFF32 overflows to another section when the line number or the
  86      relocation count exceeds 0xffff.  XCOFF64 does not overflow.  */
  87   bfd_boolean (*_xcoff_is_lineno_count_overflow)
  88     PARAMS ((bfd *, bfd_vma));
  89   bfd_boolean (*_xcoff_is_reloc_count_overflow)
  90     PARAMS ((bfd *, bfd_vma));
  91
  92   /* Loader section symbol and relocation table offset
  93      XCOFF32 is after the .loader header
  94      XCOFF64 is offset in .loader header.  */
  95   bfd_vma (*_xcoff_loader_symbol_offset)
  96     PARAMS ((bfd *, struct internal_ldhdr *));
  97   bfd_vma (*_xcoff_loader_reloc_offset)
  98     PARAMS ((bfd *, struct internal_ldhdr *));
  99
 100   /* Global linkage.  The first word of global linkage code must be be
 101      modified by filling in the correct TOC offset.  */
 102   unsigned long *_xcoff_glink_code;
 103
 104   /* Size of the global link code in bytes of the xcoff_glink_code table.  */
 105   unsigned long _xcoff_glink_size;
 106
 107   /* rtinit.  */
 108   unsigned int _xcoff_rtinit_size;
 109   bfd_boolean (*_xcoff_generate_rtinit)
 110     PARAMS ((bfd *, const char *, const char *, bfd_boolean));
 111 };
 112
 113 /* Look up an entry in an XCOFF link hash table.  */
 114 #define xcoff_link_hash_lookup(table, string, create, copy, follow) \
 115   ((struct xcoff_link_hash_entry *) \
 116    bfd_link_hash_lookup (&(table)->root, (string), (create), (copy),\
 117                          (follow)))
 118
 119 /* Traverse an XCOFF link hash table.  */
 120 #define xcoff_link_hash_traverse(table, func, info)                     \
 121   (bfd_link_hash_traverse                                               \
 122    (&(table)->root,                                                     \
 123     (bfd_boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func),      \
 124     (info)))
 125
 126 /* Get the XCOFF link hash table from the info structure.  This is
 127    just a cast.  */
 128 #define xcoff_hash_table(p) ((struct xcoff_link_hash_table *) ((p)->hash))
 129
 130
 131 #define xcoff_backend(abfd) \
 132   ((struct xcoff_backend_data_rec *) (abfd)->xvec->backend_data)
 133
 134 #define bfd_xcoff_magic_number(a) ((xcoff_backend(a)->_xcoff_magic_number))
 135 #define bfd_xcoff_architecture(a) ((xcoff_backend(a)->_xcoff_architecture))
 136 #define bfd_xcoff_machine(a) ((xcoff_backend(a)->_xcoff_machine))
 137
 138 #define bfd_xcoff_swap_ldhdr_in(a, b, c) \
 139   ((xcoff_backend(a)->_xcoff_swap_ldhdr_in) ((a), (b), (c)))
 140
 141 #define bfd_xcoff_swap_ldhdr_out(a, b, c) \
 142   ((xcoff_backend(a)->_xcoff_swap_ldhdr_out) ((a), (b), (c)))
 143
 144 #define bfd_xcoff_swap_ldsym_in(a, b, c) \
 145   ((xcoff_backend(a)->_xcoff_swap_ldsym_in) ((a), (b), (c)))
 146
 147 #define bfd_xcoff_swap_ldsym_out(a, b, c) \
 148   ((xcoff_backend(a)->_xcoff_swap_ldsym_out) ((a), (b), (c)))
 149
 150 #define bfd_xcoff_swap_ldrel_in(a, b, c) \
 151   ((xcoff_backend(a)->_xcoff_swap_ldrel_in) ((a), (b), (c)))
 152
 153 #define bfd_xcoff_swap_ldrel_out(a, b, c) \
 154   ((xcoff_backend(a)->_xcoff_swap_ldrel_out) ((a), (b), (c)))
 155
 156 #define bfd_xcoff_ldhdrsz(a) ((xcoff_backend(a)->_xcoff_ldhdrsz))
 157 #define bfd_xcoff_ldsymsz(a) ((xcoff_backend(a)->_xcoff_ldsymsz))
 158 #define bfd_xcoff_ldrelsz(a) ((xcoff_backend(a)->_xcoff_ldrelsz))
 159 #define bfd_xcoff_function_descriptor_size(a) \
 160   ((xcoff_backend(a)->_xcoff_function_descriptor_size))
 161 #define bfd_xcoff_small_aout_header_size(a) \
 162   ((xcoff_backend(a)->_xcoff_small_aout_header_size))
 163
 164 #define bfd_xcoff_ldhdr_version(a) ((xcoff_backend(a)->_xcoff_ldhdr_version))
 165
 166 #define bfd_xcoff_put_symbol_name(a, b, c, d) \
 167   ((xcoff_backend(a)->_xcoff_put_symbol_name) ((a), (b), (c), (d)))
 168
 169 #define bfd_xcoff_put_ldsymbol_name(a, b, c, d) \
 170   ((xcoff_backend(a)->_xcoff_put_ldsymbol_name) ((a), (b), (c), (d)))
 171
 172 /* Get the XCOFF hash table entries for a BFD.  */
 173 #define obj_xcoff_sym_hashes(bfd) \
 174   ((struct xcoff_link_hash_entry **) obj_coff_sym_hashes (bfd))
 175
 176 #define bfd_xcoff_dynamic_reloc_howto(a) \
 177    ((xcoff_backend(a)->_xcoff_dynamic_reloc))
 178
 179 #define bfd_xcoff_create_csect_from_smclas(a, b, c) \
 180    ((xcoff_backend(a)->_xcoff_create_csect_from_smclas((a), (b), (c))))
 181
 182 #define bfd_xcoff_is_lineno_count_overflow(a, b) \
 183    ((xcoff_backend(a)->_xcoff_is_lineno_count_overflow((a), (b))))
 184
 185 #define bfd_xcoff_is_reloc_count_overflow(a, b) \
 186    ((xcoff_backend(a)->_xcoff_is_reloc_count_overflow((a), (b))))
 187
 188 #define bfd_xcoff_loader_symbol_offset(a, b) \
 189  ((xcoff_backend(a)->_xcoff_loader_symbol_offset((a), (b))))
 190
 191 #define bfd_xcoff_loader_reloc_offset(a, b) \
 192  ((xcoff_backend(a)->_xcoff_loader_reloc_offset((a), (b))))
 193
 194 #define bfd_xcoff_glink_code(a, b) ((xcoff_backend(a)->_xcoff_glink_code[(b)]))
 195 #define bfd_xcoff_glink_code_size(a) ((xcoff_backend(a)->_xcoff_glink_size))
 196
 197 /* Check for the magic number U803XTOCMAGIC or U64_TOCMAGIC for 64 bit
 198    targets.  */
 199 #define bfd_xcoff_is_xcoff64(a) \
 200   (   (0x01EF == (bfd_xcoff_magic_number(a))) \
 201    || (0x01F7 == (bfd_xcoff_magic_number(a))))
 202
 203 /* Check for the magic number U802TOMAGIC for 32 bit targets.  */
 204 #define bfd_xcoff_is_xcoff32(a) (0x01DF == (bfd_xcoff_magic_number(a)))
 205
 206 #define bfd_xcoff_rtinit_size(a) ((xcoff_backend(a)->_xcoff_rtinit_size))
 207 #define bfd_xcoff_generate_rtinit(a, b, c, d) ((xcoff_backend(a)->_xcoff_generate_rtinit ((a), (b), (c), (d))))
 208
 209 /* Accessor macros for tdata.  */
 210 #define bfd_xcoff_text_align_power(a) ((xcoff_data (a)->text_align_power))
 211 #define bfd_xcoff_data_align_power(a) ((xcoff_data (a)->data_align_power))
 212
 213 /* xcoff*_ppc_relocate_section macros  */
 214 #define XCOFF_MAX_CALCULATE_RELOCATION (0x1c)
 215 #define XCOFF_MAX_COMPLAIN_OVERFLOW (4)
 216 /* N_ONES produces N one bits, without overflowing machine arithmetic.  */
 217 #ifdef N_ONES
 218 #undef N_ONES
 219 #endif
 220 #define N_ONES(n) (((((bfd_vma) 1 << ((n) - 1)) - 1) << 1) | 1)
 221
 222 #define XCOFF_RELOC_FUNCTION_ARGS \
 223   bfd *, asection *, bfd *, struct internal_reloc *, \
 224   struct internal_syment *, struct reloc_howto_struct *, bfd_vma, bfd_vma, \
 225   bfd_vma *relocation, bfd_byte *contents
 226
 227 #define XCOFF_COMPLAIN_FUNCTION_ARGS \
 228   bfd *, bfd_vma, bfd_vma, struct reloc_howto_struct *howto
 229
 230 extern bfd_boolean (*xcoff_calculate_relocation[XCOFF_MAX_CALCULATE_RELOCATION])
 231   PARAMS ((XCOFF_RELOC_FUNCTION_ARGS));
 232 extern bfd_boolean (*xcoff_complain_overflow[XCOFF_MAX_COMPLAIN_OVERFLOW])
 233   PARAMS ((XCOFF_COMPLAIN_FUNCTION_ARGS));
 234
 235 /* Relocation functions */
 236 bfd_boolean xcoff_reloc_type_noop PARAMS ((XCOFF_RELOC_FUNCTION_ARGS));
 237 bfd_boolean xcoff_reloc_type_fail PARAMS ((XCOFF_RELOC_FUNCTION_ARGS));
 238 bfd_boolean xcoff_reloc_type_pos PARAMS ((XCOFF_RELOC_FUNCTION_ARGS));
 239 bfd_boolean xcoff_reloc_type_neg PARAMS ((XCOFF_RELOC_FUNCTION_ARGS));
 240 bfd_boolean xcoff_reloc_type_rel PARAMS ((XCOFF_RELOC_FUNCTION_ARGS));
 241 bfd_boolean xcoff_reloc_type_toc PARAMS ((XCOFF_RELOC_FUNCTION_ARGS));
 242 bfd_boolean xcoff_reloc_type_ba PARAMS ((XCOFF_RELOC_FUNCTION_ARGS));
 243 bfd_boolean xcoff_reloc_type_crel PARAMS ((XCOFF_RELOC_FUNCTION_ARGS));
 244
 245 #endif /* LIBXCOFF_H */