bfd/libxcoff.h

   1 /* BFD XCOFF object file private structure.
   2    Copyright (C) 2001-2020 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 3 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,
  20    MA 02110-1301, USA.  */
  21
  22 #ifndef LIBXCOFF_H
  23 #define LIBXCOFF_H
  24
  25 /* This is the backend information kept for XCOFF files.  This
  26    structure is constant for a particular backend.  The first element
  27    is the COFF backend data structure, so that XCOFF targets can use
  28    the generic COFF code.  */
  29
  30 struct xcoff_backend_data_rec
  31 {
  32   /* COFF backend information.  */
  33   bfd_coff_backend_data coff;
  34
  35   /* Magic number.  */
  36   unsigned short _xcoff_magic_number;
  37
  38   /* Architecture and machine for coff_set_arch_mach_hook.  */
  39   enum bfd_architecture _xcoff_architecture;
  40   long _xcoff_machine;
  41
  42   /* Function pointers to xcoff specific swap routines.  */
  43   void (* _xcoff_swap_ldhdr_in) (bfd *, const void *, struct internal_ldhdr *);
  44   void (* _xcoff_swap_ldhdr_out)(bfd *, const struct internal_ldhdr *, void *);
  45   void (* _xcoff_swap_ldsym_in) (bfd *, const void *, struct internal_ldsym *);
  46   void (* _xcoff_swap_ldsym_out)(bfd *, const struct internal_ldsym *, void *);
  47   void (* _xcoff_swap_ldrel_in) (bfd *, const void *, struct internal_ldrel *);
  48   void (* _xcoff_swap_ldrel_out)(bfd *, const struct internal_ldrel *, void *);
  49
  50   /* Size of the external struct.  */
  51   unsigned int _xcoff_ldhdrsz;
  52   unsigned int _xcoff_ldsymsz;
  53   unsigned int _xcoff_ldrelsz;
  54
  55   /* Size an entry in a descriptor section.  */
  56   unsigned int _xcoff_function_descriptor_size;
  57
  58   /* Size of the small aout file header.  */
  59   unsigned int _xcoff_small_aout_header_size;
  60
  61   /* Loader version
  62      1 : XCOFF32
  63      2 : XCOFF64.  */
  64   unsigned long _xcoff_ldhdr_version;
  65
  66   bfd_boolean (* _xcoff_put_symbol_name)
  67     (struct bfd_link_info *, struct bfd_strtab_hash *,
  68      struct internal_syment *, const char *);
  69
  70   bfd_boolean (* _xcoff_put_ldsymbol_name)
  71     (bfd *, struct xcoff_loader_info *, struct internal_ldsym *,
  72      const char *);
  73
  74   reloc_howto_type *_xcoff_dynamic_reloc;
  75
  76   asection * (* _xcoff_create_csect_from_smclas)
  77     (bfd *, union internal_auxent *, const char *);
  78
  79   /* Line number and relocation overflow.
  80      XCOFF32 overflows to another section when the line number or the
  81      relocation count exceeds 0xffff.  XCOFF64 does not overflow.  */
  82   bfd_boolean (*_xcoff_is_lineno_count_overflow) (bfd *, bfd_vma);
  83   bfd_boolean (*_xcoff_is_reloc_count_overflow)  (bfd *, bfd_vma);
  84
  85   /* Loader section symbol and relocation table offset
  86      XCOFF32 is after the .loader header
  87      XCOFF64 is offset in .loader header.  */
  88   bfd_vma (*_xcoff_loader_symbol_offset) (bfd *, struct internal_ldhdr *);
  89   bfd_vma (*_xcoff_loader_reloc_offset)  (bfd *, struct internal_ldhdr *);
  90
  91   /* Global linkage.  The first word of global linkage code must be be
  92      modified by filling in the correct TOC offset.  */
  93   unsigned long *_xcoff_glink_code;
  94
  95   /* Size of the global link code in bytes of the xcoff_glink_code table.  */
  96   unsigned long _xcoff_glink_size;
  97
  98   /* rtinit.  */
  99   unsigned int _xcoff_rtinit_size;
 100   bfd_boolean (*_xcoff_generate_rtinit)
 101     (bfd *, const char *, const char *, bfd_boolean);
 102 };
 103
 104 /* Look up an entry in an XCOFF link hash table.  */
 105 #define xcoff_link_hash_lookup(table, string, create, copy, follow) \
 106   ((struct xcoff_link_hash_entry *) \
 107    bfd_link_hash_lookup (&(table)->root, (string), (create), (copy),\
 108                          (follow)))
 109
 110 /* Traverse an XCOFF link hash table.  */
 111 #define xcoff_link_hash_traverse(table, func, info)                     \
 112   (bfd_link_hash_traverse                                               \
 113    (&(table)->root,                                                     \
 114     (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func),    \
 115     (info)))
 116
 117 /* Get the XCOFF link hash table from the info structure.  This is
 118    just a cast.  */
 119 #define xcoff_hash_table(p) ((struct xcoff_link_hash_table *) ((p)->hash))
 120
 121
 122 #define xcoff_backend(abfd) \
 123   ((struct xcoff_backend_data_rec *) (abfd)->xvec->backend_data)
 124
 125 #define bfd_xcoff_magic_number(a) ((xcoff_backend (a)->_xcoff_magic_number))
 126 #define bfd_xcoff_architecture(a) ((xcoff_backend (a)->_xcoff_architecture))
 127 #define bfd_xcoff_machine(a)      ((xcoff_backend (a)->_xcoff_machine))
 128
 129 #define bfd_xcoff_swap_ldhdr_in(a, b, c) \
 130   ((xcoff_backend (a)->_xcoff_swap_ldhdr_in) ((a), (b), (c)))
 131
 132 #define bfd_xcoff_swap_ldhdr_out(a, b, c) \
 133   ((xcoff_backend (a)->_xcoff_swap_ldhdr_out) ((a), (b), (c)))
 134
 135 #define bfd_xcoff_swap_ldsym_in(a, b, c) \
 136   ((xcoff_backend (a)->_xcoff_swap_ldsym_in) ((a), (b), (c)))
 137
 138 #define bfd_xcoff_swap_ldsym_out(a, b, c) \
 139   ((xcoff_backend (a)->_xcoff_swap_ldsym_out) ((a), (b), (c)))
 140
 141 #define bfd_xcoff_swap_ldrel_in(a, b, c) \
 142   ((xcoff_backend (a)->_xcoff_swap_ldrel_in) ((a), (b), (c)))
 143
 144 #define bfd_xcoff_swap_ldrel_out(a, b, c) \
 145   ((xcoff_backend (a)->_xcoff_swap_ldrel_out) ((a), (b), (c)))
 146
 147 #define bfd_xcoff_ldhdrsz(a) ((xcoff_backend (a)->_xcoff_ldhdrsz))
 148 #define bfd_xcoff_ldsymsz(a) ((xcoff_backend (a)->_xcoff_ldsymsz))
 149 #define bfd_xcoff_ldrelsz(a) ((xcoff_backend (a)->_xcoff_ldrelsz))
 150 #define bfd_xcoff_function_descriptor_size(a) \
 151   ((xcoff_backend (a)->_xcoff_function_descriptor_size))
 152 #define bfd_xcoff_small_aout_header_size(a) \
 153   ((xcoff_backend (a)->_xcoff_small_aout_header_size))
 154
 155 #define bfd_xcoff_ldhdr_version(a) ((xcoff_backend (a)->_xcoff_ldhdr_version))
 156
 157 #define bfd_xcoff_put_symbol_name(a, b, c, d, e) \
 158   ((xcoff_backend (a)->_xcoff_put_symbol_name) ((b), (c), (d), (e)))
 159
 160 #define bfd_xcoff_put_ldsymbol_name(a, b, c, d) \
 161   ((xcoff_backend (a)->_xcoff_put_ldsymbol_name) ((a), (b), (c), (d)))
 162
 163 /* Get the XCOFF hash table entries for a BFD.  */
 164 #define obj_xcoff_sym_hashes(bfd) \
 165   ((struct xcoff_link_hash_entry **) obj_coff_sym_hashes (bfd))
 166
 167 #define bfd_xcoff_dynamic_reloc_howto(a) \
 168    ((xcoff_backend (a)->_xcoff_dynamic_reloc))
 169
 170 #define bfd_xcoff_create_csect_from_smclas(a, b, c) \
 171    ((xcoff_backend (a)->_xcoff_create_csect_from_smclas((a), (b), (c))))
 172
 173 #define bfd_xcoff_is_lineno_count_overflow(a, b) \
 174    ((xcoff_backend (a)->_xcoff_is_lineno_count_overflow((a), (b))))
 175
 176 #define bfd_xcoff_is_reloc_count_overflow(a, b) \
 177    ((xcoff_backend (a)->_xcoff_is_reloc_count_overflow((a), (b))))
 178
 179 #define bfd_xcoff_loader_symbol_offset(a, b) \
 180  ((xcoff_backend (a)->_xcoff_loader_symbol_offset((a), (b))))
 181
 182 #define bfd_xcoff_loader_reloc_offset(a, b) \
 183  ((xcoff_backend (a)->_xcoff_loader_reloc_offset((a), (b))))
 184
 185 #define bfd_xcoff_glink_code(a, b)   ((xcoff_backend (a)->_xcoff_glink_code[(b)]))
 186 #define bfd_xcoff_glink_code_size(a) ((xcoff_backend (a)->_xcoff_glink_size))
 187
 188 /* Check for the magic number U803XTOCMAGIC or U64_TOCMAGIC for 64 bit
 189    targets.  */
 190 #define bfd_xcoff_is_xcoff64(a) \
 191   (   (0x01EF == (bfd_xcoff_magic_number (a))) \
 192    || (0x01F7 == (bfd_xcoff_magic_number (a))))
 193
 194 /* Check for the magic number U802TOMAGIC for 32 bit targets.  */
 195 #define bfd_xcoff_is_xcoff32(a) (0x01DF == (bfd_xcoff_magic_number (a)))
 196
 197 #define bfd_xcoff_rtinit_size(a)              ((xcoff_backend (a)->_xcoff_rtinit_size))
 198 #define bfd_xcoff_generate_rtinit(a, b, c, d) ((xcoff_backend (a)->_xcoff_generate_rtinit ((a), (b), (c), (d))))
 199
 200 /* Accessor macros for tdata.  */
 201 #define bfd_xcoff_text_align_power(a) ((xcoff_data (a)->text_align_power))
 202 #define bfd_xcoff_data_align_power(a) ((xcoff_data (a)->data_align_power))
 203
 204 /* xcoff*_ppc_relocate_section macros  */
 205 #define XCOFF_MAX_CALCULATE_RELOCATION (0x1c)
 206 #define XCOFF_MAX_COMPLAIN_OVERFLOW (4)
 207 /* N_ONES produces N one bits, without overflowing machine arithmetic.  */
 208 #ifdef N_ONES
 209 #undef N_ONES
 210 #endif
 211 #define N_ONES(n) (((((bfd_vma) 1 << ((n) - 1)) - 1) << 1) | 1)
 212
 213 #define XCOFF_RELOC_FUNCTION_ARGS \
 214   bfd *, asection *, bfd *, struct internal_reloc *, \
 215   struct internal_syment *, struct reloc_howto_struct *, bfd_vma, bfd_vma, \
 216   bfd_vma *relocation, bfd_byte *contents
 217
 218 #define XCOFF_COMPLAIN_FUNCTION_ARGS \
 219   bfd *, bfd_vma, bfd_vma, struct reloc_howto_struct *howto
 220
 221 extern bfd_boolean (*xcoff_calculate_relocation[XCOFF_MAX_CALCULATE_RELOCATION])
 222   (XCOFF_RELOC_FUNCTION_ARGS);
 223 extern bfd_boolean (*xcoff_complain_overflow[XCOFF_MAX_COMPLAIN_OVERFLOW])
 224   (XCOFF_COMPLAIN_FUNCTION_ARGS);
 225
 226 #define XCOFF_NO_LONG_SECTION_NAMES  (FALSE), bfd_coff_set_long_section_names_disallowed
 227
 228 /* Relocation functions */
 229 bfd_boolean xcoff_reloc_type_noop (XCOFF_RELOC_FUNCTION_ARGS);
 230 bfd_boolean xcoff_reloc_type_fail (XCOFF_RELOC_FUNCTION_ARGS);
 231 bfd_boolean xcoff_reloc_type_pos  (XCOFF_RELOC_FUNCTION_ARGS);
 232 bfd_boolean xcoff_reloc_type_neg  (XCOFF_RELOC_FUNCTION_ARGS);
 233 bfd_boolean xcoff_reloc_type_rel  (XCOFF_RELOC_FUNCTION_ARGS);
 234 bfd_boolean xcoff_reloc_type_toc  (XCOFF_RELOC_FUNCTION_ARGS);
 235 bfd_boolean xcoff_reloc_type_ba   (XCOFF_RELOC_FUNCTION_ARGS);
 236 bfd_boolean xcoff_reloc_type_crel (XCOFF_RELOC_FUNCTION_ARGS);
 237
 238 /* Structure to describe dwarf sections.
 239    Useful to convert from XCOFF section name to flag and vice-versa.
 240    Also mark if section has a length field at the beginning.  */
 241 struct xcoff_dwsect_name {
 242   /* A XCOFF dwarf section is identified by its name.  */
 243   unsigned int flag;
 244
 245   /* Corresponding XCOFF section name.  */
 246   const char *name;
 247
 248   /* True if size must be prepended.  */
 249   bfd_boolean def_size;
 250 };
 251
 252 /* Number of entries in the array.  The number is known and public so that user
 253    can 'extend' this array by index.  */
 254 #define XCOFF_DWSECT_NBR_NAMES  8
 255
 256 /* The dwarf sections array.  */
 257 extern const struct xcoff_dwsect_name
 258   xcoff_dwsect_names[XCOFF_DWSECT_NBR_NAMES];
 259
 260 #endif /* LIBXCOFF_H */