1 /* BFD XCOFF object file private structure. 2 Copyright (C) 2001-2021 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 bool (* _xcoff_put_symbol_name) 67 (struct bfd_link_info *, struct bfd_strtab_hash *, 68 struct internal_syment *, const char *); 69 70 bool (* _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 bool (*_xcoff_is_lineno_count_overflow) (bfd *, bfd_vma); 83 bool (*_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 const 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 bool (*_xcoff_generate_rtinit) 101 (bfd *, const char *, const char *, bool); 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 (bool (*) (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 (0x32) 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 typedef bool xcoff_reloc_function (bfd *, asection *, bfd *, 214 struct internal_reloc *, 215 struct internal_syment *, 216 struct reloc_howto_struct *, 217 bfd_vma, bfd_vma, 218 bfd_vma *, bfd_byte *); 219 220 typedef bool xcoff_complain_function (bfd *, bfd_vma, bfd_vma, 221 struct reloc_howto_struct *); 222 223 extern xcoff_reloc_function *const xcoff_calculate_relocation[]; 224 extern xcoff_complain_function *const xcoff_complain_overflow[]; 225 226 #define XCOFF_NO_LONG_SECTION_NAMES (false), bfd_coff_set_long_section_names_disallowed 227 228 /* Relocation functions */ 229 extern xcoff_reloc_function xcoff_reloc_type_noop; 230 extern xcoff_reloc_function xcoff_reloc_type_fail; 231 extern xcoff_reloc_function xcoff_reloc_type_pos; 232 extern xcoff_reloc_function xcoff_reloc_type_neg; 233 extern xcoff_reloc_function xcoff_reloc_type_rel; 234 extern xcoff_reloc_function xcoff_reloc_type_toc; 235 extern xcoff_reloc_function xcoff_reloc_type_ba; 236 extern xcoff_reloc_function xcoff_reloc_type_crel; 237 extern xcoff_reloc_function xcoff_reloc_type_tls; 238 239 /* Structure to describe dwarf sections. 240 Useful to convert from XCOFF section name to flag and vice-versa. 241 Also mark if section has a length field at the beginning. */ 242 struct xcoff_dwsect_name { 243 /* A XCOFF dwarf section is identified by its name. */ 244 unsigned int flag; 245 246 /* Corresponding XCOFF section name. */ 247 const char *name; 248 249 /* True if size must be prepended. */ 250 bool def_size; 251 }; 252 253 /* Number of entries in the array. The number is known and public so that user 254 can 'extend' this array by index. */ 255 #define XCOFF_DWSECT_NBR_NAMES 11 256 257 /* The dwarf sections array. */ 258 extern const struct xcoff_dwsect_name 259 xcoff_dwsect_names[XCOFF_DWSECT_NBR_NAMES]; 260 261 #endif /* LIBXCOFF_H */ 262