bfd/libxcoff.h

   1 /* BFD XCOFF object file private structure.
   2    Copyright 2001, 2002, 2005 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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) (bfd *, const void *, struct internal_ldhdr *);
  43   void (* _xcoff_swap_ldhdr_out)(bfd *, const struct internal_ldhdr *, void *);
  44   void (* _xcoff_swap_ldsym_in) (bfd *, const void *, struct internal_ldsym *);
  45   void (* _xcoff_swap_ldsym_out)(bfd *, const struct internal_ldsym *, void *);
  46   void (* _xcoff_swap_ldrel_in) (bfd *, const void *, struct internal_ldrel *);
  47   void (* _xcoff_swap_ldrel_out)(bfd *, const struct internal_ldrel *, void *);
  48
  49   /* Size of the external struct.  */
  50   unsigned int _xcoff_ldhdrsz;
  51   unsigned int _xcoff_ldsymsz;
  52   unsigned int _xcoff_ldrelsz;
  53
  54   /* Size an entry in a descriptor section.  */
  55   unsigned int _xcoff_function_descriptor_size;
  56
  57   /* Size of the small aout file header.  */
  58   unsigned int _xcoff_small_aout_header_size;
  59
  60   /* Loader version
  61      1 : XCOFF32
  62      2 : XCOFF64.  */
  63   unsigned long _xcoff_ldhdr_version;
  64
  65   bfd_boolean (* _xcoff_put_symbol_name)
  66     (bfd *, struct bfd_strtab_hash *, struct internal_syment *,
  67      const char *);
  68
  69   bfd_boolean (* _xcoff_put_ldsymbol_name)
  70     (bfd *, struct xcoff_loader_info *, struct internal_ldsym *,
  71      const char *);
  72
  73   reloc_howto_type *_xcoff_dynamic_reloc;
  74
  75   asection * (* _xcoff_create_csect_from_smclas)
  76     (bfd *, union internal_auxent *, const char *);
  77
  78   /* Line number and relocation overflow.
  79      XCOFF32 overflows to another section when the line number or the
  80      relocation count exceeds 0xffff.  XCOFF64 does not overflow.  */
  81   bfd_boolean (*_xcoff_is_lineno_count_overflow) (bfd *, bfd_vma);
  82   bfd_boolean (*_xcoff_is_reloc_count_overflow)  (bfd *, bfd_vma);
  83
  84   /* Loader section symbol and relocation table offset
  85      XCOFF32 is after the .loader header
  86      XCOFF64 is offset in .loader header.  */
  87   bfd_vma (*_xcoff_loader_symbol_offset) (bfd *, struct internal_ldhdr *);
  88   bfd_vma (*_xcoff_loader_reloc_offset)  (bfd *, struct internal_ldhdr *);
  89
  90   /* Global linkage.  The first word of global linkage code must be be
  91      modified by filling in the correct TOC offset.  */
  92   unsigned long *_xcoff_glink_code;
  93
  94   /* Size of the global link code in bytes of the xcoff_glink_code table.  */
  95   unsigned long _xcoff_glink_size;
  96
  97   /* rtinit.  */
  98   unsigned int _xcoff_rtinit_size;
  99   bfd_boolean (*_xcoff_generate_rtinit)
 100     (bfd *, const char *, const char *, bfd_boolean);
 101 };
 102
 103 /* Look up an entry in an XCOFF link hash table.  */
 104 #define xcoff_link_hash_lookup(table, string, create, copy, follow) \
 105   ((struct xcoff_link_hash_entry *) \
 106    bfd_link_hash_lookup (&(table)->root, (string), (create), (copy),\
 107                          (follow)))
 108
 109 /* Traverse an XCOFF link hash table.  */
 110 #define xcoff_link_hash_traverse(table, func, info)                     \
 111   (bfd_link_hash_traverse                                               \
 112    (&(table)->root,                                                     \
 113     (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func),    \
 114     (info)))
 115
 116 /* Get the XCOFF link hash table from the info structure.  This is
 117    just a cast.  */
 118 #define xcoff_hash_table(p) ((struct xcoff_link_hash_table *) ((p)->hash))
 119
 120
 121 #define xcoff_backend(abfd) \
 122   ((struct xcoff_backend_data_rec *) (abfd)->xvec->backend_data)
 123
 124 #define bfd_xcoff_magic_number(a) ((xcoff_backend (a)->_xcoff_magic_number))
 125 #define bfd_xcoff_architecture(a) ((xcoff_backend (a)->_xcoff_architecture))
 126 #define bfd_xcoff_machine(a)      ((xcoff_backend (a)->_xcoff_machine))
 127
 128 #define bfd_xcoff_swap_ldhdr_in(a, b, c) \
 129   ((xcoff_backend (a)->_xcoff_swap_ldhdr_in) ((a), (b), (c)))
 130
 131 #define bfd_xcoff_swap_ldhdr_out(a, b, c) \
 132   ((xcoff_backend (a)->_xcoff_swap_ldhdr_out) ((a), (b), (c)))
 133
 134 #define bfd_xcoff_swap_ldsym_in(a, b, c) \
 135   ((xcoff_backend (a)->_xcoff_swap_ldsym_in) ((a), (b), (c)))
 136
 137 #define bfd_xcoff_swap_ldsym_out(a, b, c) \
 138   ((xcoff_backend (a)->_xcoff_swap_ldsym_out) ((a), (b), (c)))
 139
 140 #define bfd_xcoff_swap_ldrel_in(a, b, c) \
 141   ((xcoff_backend (a)->_xcoff_swap_ldrel_in) ((a), (b), (c)))
 142
 143 #define bfd_xcoff_swap_ldrel_out(a, b, c) \
 144   ((xcoff_backend (a)->_xcoff_swap_ldrel_out) ((a), (b), (c)))
 145
 146 #define bfd_xcoff_ldhdrsz(a) ((xcoff_backend (a)->_xcoff_ldhdrsz))
 147 #define bfd_xcoff_ldsymsz(a) ((xcoff_backend (a)->_xcoff_ldsymsz))
 148 #define bfd_xcoff_ldrelsz(a) ((xcoff_backend (a)->_xcoff_ldrelsz))
 149 #define bfd_xcoff_function_descriptor_size(a) \
 150   ((xcoff_backend (a)->_xcoff_function_descriptor_size))
 151 #define bfd_xcoff_small_aout_header_size(a) \
 152   ((xcoff_backend (a)->_xcoff_small_aout_header_size))
 153
 154 #define bfd_xcoff_ldhdr_version(a) ((xcoff_backend (a)->_xcoff_ldhdr_version))
 155
 156 #define bfd_xcoff_put_symbol_name(a, b, c, d) \
 157   ((xcoff_backend (a)->_xcoff_put_symbol_name) ((a), (b), (c), (d)))
 158
 159 #define bfd_xcoff_put_ldsymbol_name(a, b, c, d) \
 160   ((xcoff_backend (a)->_xcoff_put_ldsymbol_name) ((a), (b), (c), (d)))
 161
 162 /* Get the XCOFF hash table entries for a BFD.  */
 163 #define obj_xcoff_sym_hashes(bfd) \
 164   ((struct xcoff_link_hash_entry **) obj_coff_sym_hashes (bfd))
 165
 166 #define bfd_xcoff_dynamic_reloc_howto(a) \
 167    ((xcoff_backend (a)->_xcoff_dynamic_reloc))
 168
 169 #define bfd_xcoff_create_csect_from_smclas(a, b, c) \
 170    ((xcoff_backend (a)->_xcoff_create_csect_from_smclas((a), (b), (c))))
 171
 172 #define bfd_xcoff_is_lineno_count_overflow(a, b) \
 173    ((xcoff_backend (a)->_xcoff_is_lineno_count_overflow((a), (b))))
 174
 175 #define bfd_xcoff_is_reloc_count_overflow(a, b) \
 176    ((xcoff_backend (a)->_xcoff_is_reloc_count_overflow((a), (b))))
 177
 178 #define bfd_xcoff_loader_symbol_offset(a, b) \
 179  ((xcoff_backend (a)->_xcoff_loader_symbol_offset((a), (b))))
 180
 181 #define bfd_xcoff_loader_reloc_offset(a, b) \
 182  ((xcoff_backend (a)->_xcoff_loader_reloc_offset((a), (b))))
 183
 184 #define bfd_xcoff_glink_code(a, b)   ((xcoff_backend (a)->_xcoff_glink_code[(b)]))
 185 #define bfd_xcoff_glink_code_size(a) ((xcoff_backend (a)->_xcoff_glink_size))
 186
 187 /* Check for the magic number U803XTOCMAGIC or U64_TOCMAGIC for 64 bit
 188    targets.  */
 189 #define bfd_xcoff_is_xcoff64(a) \
 190   (   (0x01EF == (bfd_xcoff_magic_number (a))) \
 191    || (0x01F7 == (bfd_xcoff_magic_number (a))))
 192
 193 /* Check for the magic number U802TOMAGIC for 32 bit targets.  */
 194 #define bfd_xcoff_is_xcoff32(a) (0x01DF == (bfd_xcoff_magic_number (a)))
 195
 196 #define bfd_xcoff_rtinit_size(a)              ((xcoff_backend (a)->_xcoff_rtinit_size))
 197 #define bfd_xcoff_generate_rtinit(a, b, c, d) ((xcoff_backend (a)->_xcoff_generate_rtinit ((a), (b), (c), (d))))
 198
 199 /* Accessor macros for tdata.  */
 200 #define bfd_xcoff_text_align_power(a) ((xcoff_data (a)->text_align_power))
 201 #define bfd_xcoff_data_align_power(a) ((xcoff_data (a)->data_align_power))
 202
 203 /* xcoff*_ppc_relocate_section macros  */
 204 #define XCOFF_MAX_CALCULATE_RELOCATION (0x1c)
 205 #define XCOFF_MAX_COMPLAIN_OVERFLOW (4)
 206 /* N_ONES produces N one bits, without overflowing machine arithmetic.  */
 207 #ifdef N_ONES
 208 #undef N_ONES
 209 #endif
 210 #define N_ONES(n) (((((bfd_vma) 1 << ((n) - 1)) - 1) << 1) | 1)
 211
 212 #define XCOFF_RELOC_FUNCTION_ARGS \
 213   bfd *, asection *, bfd *, struct internal_reloc *, \
 214   struct internal_syment *, struct reloc_howto_struct *, bfd_vma, bfd_vma, \
 215   bfd_vma *relocation, bfd_byte *contents
 216
 217 #define XCOFF_COMPLAIN_FUNCTION_ARGS \
 218   bfd *, bfd_vma, bfd_vma, struct reloc_howto_struct *howto
 219
 220 extern bfd_boolean (*xcoff_calculate_relocation[XCOFF_MAX_CALCULATE_RELOCATION])
 221   (XCOFF_RELOC_FUNCTION_ARGS);
 222 extern bfd_boolean (*xcoff_complain_overflow[XCOFF_MAX_COMPLAIN_OVERFLOW])
 223   (XCOFF_COMPLAIN_FUNCTION_ARGS);
 224
 225 /* Relocation functions */
 226 bfd_boolean xcoff_reloc_type_noop (XCOFF_RELOC_FUNCTION_ARGS);
 227 bfd_boolean xcoff_reloc_type_fail (XCOFF_RELOC_FUNCTION_ARGS);
 228 bfd_boolean xcoff_reloc_type_pos  (XCOFF_RELOC_FUNCTION_ARGS);
 229 bfd_boolean xcoff_reloc_type_neg  (XCOFF_RELOC_FUNCTION_ARGS);
 230 bfd_boolean xcoff_reloc_type_rel  (XCOFF_RELOC_FUNCTION_ARGS);
 231 bfd_boolean xcoff_reloc_type_toc  (XCOFF_RELOC_FUNCTION_ARGS);
 232 bfd_boolean xcoff_reloc_type_ba   (XCOFF_RELOC_FUNCTION_ARGS);
 233 bfd_boolean xcoff_reloc_type_crel (XCOFF_RELOC_FUNCTION_ARGS);
 234
 235 #endif /* LIBXCOFF_H */