1 /* Main header file for the bfd library -- portable access to object files. 2 3 Copyright (C) 1990-2022 Free Software Foundation, Inc. 4 5 Contributed by Cygnus Support. 6 7 This file is part of BFD, the Binary File Descriptor library. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the Free Software 21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 22 23 #ifndef __BFD_H_SEEN__ 24 #define __BFD_H_SEEN__ 25 26 /* PR 14072: Ensure that config.h is included first. */ 27 #if !defined PACKAGE && !defined PACKAGE_VERSION 28 #error config.h must be included before this header 29 #endif 30 31 #ifdef __cplusplus 32 extern "C" { 33 #endif 34 35 #include "ansidecl.h" 36 #include "symcat.h" 37 #include <stdint.h> 38 #include <stdbool.h> 39 #include "diagnostics.h" 40 #include <stdarg.h> 41 #include <string.h> 42 #include <sys/stat.h> 43 44 #if defined (__STDC__) || defined (ALMOST_STDC) || defined (HAVE_STRINGIZE) 45 #ifndef SABER 46 /* This hack is to avoid a problem with some strict ANSI C preprocessors. 47 The problem is, "32_" is not a valid preprocessing token, and we don't 48 want extra underscores (e.g., "nlm_32_"). The XCONCAT2 macro will 49 cause the inner CONCAT2 macros to be evaluated first, producing 50 still-valid pp-tokens. Then the final concatenation can be done. */ 51 #undef CONCAT4 52 #define CONCAT4(a,b,c,d) XCONCAT2(CONCAT2(a,b),CONCAT2(c,d)) 53 #endif 54 #endif 55 56 /* This is a utility macro to handle the situation where the code 57 wants to place a constant string into the code, followed by a 58 comma and then the length of the string. Doing this by hand 59 is error prone, so using this macro is safer. */ 60 #define STRING_COMMA_LEN(STR) (STR), (sizeof (STR) - 1) 61 62 #define BFD_SUPPORTS_PLUGINS @supports_plugins@ 63 64 /* The word size used by BFD on the host. This may be 64 with a 32 65 bit target if the host is 64 bit, or if other 64 bit targets have 66 been selected with --enable-targets, or if --enable-64-bit-bfd. */ 67 #define BFD_ARCH_SIZE @wordsize@ 68 69 /* The word size of the default bfd target. */ 70 #define BFD_DEFAULT_TARGET_SIZE @bfd_default_target_size@ 71 72 #include <inttypes.h> 73 74 #if BFD_ARCH_SIZE >= 64 75 #define BFD64 76 #endif 77 78 /* Forward declaration. */ 79 typedef struct bfd bfd; 80 81 /* Boolean type used in bfd. 82 General rule: Functions which are bfd_boolean return TRUE on 83 success and FALSE on failure (unless they're a predicate). */ 84 85 #ifdef POISON_BFD_BOOLEAN 86 # pragma GCC poison bfd_boolean 87 #else 88 # define bfd_boolean bool 89 # undef FALSE 90 # undef TRUE 91 # define FALSE 0 92 # define TRUE 1 93 #endif 94 95 /* Silence "applying zero offset to null pointer" UBSAN warnings. */ 96 #define PTR_ADD(P,A) ((A) != 0 ? (P) + (A) : (P)) 97 /* Also prevent non-zero offsets from being applied to a null pointer. */ 98 #define NPTR_ADD(P,A) ((P) != NULL ? (P) + (A) : (P)) 99 100 #ifdef BFD64 101 102 /* Represent a target address. Also used as a generic unsigned type 103 which is guaranteed to be big enough to hold any arithmetic types 104 we need to deal with. */ 105 typedef uint64_t bfd_vma; 106 107 /* A generic signed type which is guaranteed to be big enough to hold any 108 arithmetic types we need to deal with. Can be assumed to be compatible 109 with bfd_vma in the same way that signed and unsigned ints are compatible 110 (as parameters, in assignment, etc). */ 111 typedef int64_t bfd_signed_vma; 112 113 typedef uint64_t bfd_size_type; 114 typedef uint64_t symvalue; 115 116 #else /* not BFD64 */ 117 118 typedef unsigned long bfd_vma; 119 typedef long bfd_signed_vma; 120 typedef unsigned long symvalue; 121 typedef unsigned long bfd_size_type; 122 123 #endif /* not BFD64 */ 124 125 #define HALF_BFD_SIZE_TYPE \ 126 (((bfd_size_type) 1) << (8 * sizeof (bfd_size_type) / 2)) 127 128 /* An offset into a file. BFD always uses the largest possible offset 129 based on the build time availability of fseek, fseeko, or fseeko64. */ 130 typedef @bfd_file_ptr@ file_ptr; 131 typedef @bfd_ufile_ptr@ ufile_ptr; 132 133 extern void bfd_sprintf_vma (bfd *, char *, bfd_vma); 134 extern void bfd_fprintf_vma (bfd *, void *, bfd_vma); 135 136 #define bfd_printf_vma(abfd,x) bfd_fprintf_vma (abfd,stdout,x) 137 138 typedef unsigned int flagword; /* 32 bits of flags */ 139 typedef unsigned char bfd_byte; 140 141 /* File formats. */ 142 143 typedef enum bfd_format 144 { 145 bfd_unknown = 0, /* File format is unknown. */ 146 bfd_object, /* Linker/assembler/compiler output. */ 147 bfd_archive, /* Object archive file. */ 148 bfd_core, /* Core dump. */ 149 bfd_type_end /* Marks the end; don't use it! */ 150 } 151 bfd_format; 152 153 /* Symbols and relocation. */ 154 155 /* A count of carsyms (canonical archive symbols). */ 156 typedef unsigned long symindex; 157 158 #define BFD_NO_MORE_SYMBOLS ((symindex) ~0) 159 160 /* A canonical archive symbol. */ 161 /* This is a type pun with struct ranlib on purpose! */ 162 typedef struct carsym 163 { 164 const char *name; 165 file_ptr file_offset; /* Look here to find the file. */ 166 } 167 carsym; /* To make these you call a carsymogen. */ 168 169 /* Used in generating armaps (archive tables of contents). 170 Perhaps just a forward definition would do? */ 171 struct orl /* Output ranlib. */ 172 { 173 char **name; /* Symbol name. */ 174 union 175 { 176 file_ptr pos; 177 bfd *abfd; 178 } u; /* bfd* or file position. */ 179 int namidx; /* Index into string table. */ 180 }; 181 182 /* Linenumber stuff. */ 183 typedef struct lineno_cache_entry 184 { 185 unsigned int line_number; /* Linenumber from start of function. */ 186 union 187 { 188 struct bfd_symbol *sym; /* Function name. */ 189 bfd_vma offset; /* Offset into section. */ 190 } u; 191 } 192 alent; 193 194 /* Object and core file sections. */ 195 typedef struct bfd_section *sec_ptr; 196 197 #define align_power(addr, align) \ 198 (((addr) + ((bfd_vma) 1 << (align)) - 1) & (-((bfd_vma) 1 << (align)))) 199 200 /* Align an address upward to a boundary, expressed as a number of bytes. 201 E.g. align to an 8-byte boundary with argument of 8. Take care never 202 to wrap around if the address is within boundary-1 of the end of the 203 address space. */ 204 #define BFD_ALIGN(this, boundary) \ 205 ((((bfd_vma) (this) + (boundary) - 1) >= (bfd_vma) (this)) \ 206 ? (((bfd_vma) (this) + ((boundary) - 1)) & ~ (bfd_vma) ((boundary)-1)) \ 207 : ~ (bfd_vma) 0) 208 209 typedef enum bfd_print_symbol 210 { 211 bfd_print_symbol_name, 212 bfd_print_symbol_more, 213 bfd_print_symbol_all 214 } bfd_print_symbol_type; 215 216 /* Information about a symbol that nm needs. */ 217 218 typedef struct _symbol_info 219 { 220 symvalue value; 221 char type; 222 const char *name; /* Symbol name. */ 223 unsigned char stab_type; /* Stab type. */ 224 char stab_other; /* Stab other. */ 225 short stab_desc; /* Stab desc. */ 226 const char *stab_name; /* String for stab type. */ 227 } symbol_info; 228 229 /* Get the name of a stabs type code. */ 230 231 extern const char *bfd_get_stab_name (int); 232 233 /* Hash table routines. There is no way to free up a hash table. */ 234 235 /* An element in the hash table. Most uses will actually use a larger 236 structure, and an instance of this will be the first field. */ 237 238 struct bfd_hash_entry 239 { 240 /* Next entry for this hash code. */ 241 struct bfd_hash_entry *next; 242 /* String being hashed. */ 243 const char *string; 244 /* Hash code. This is the full hash code, not the index into the 245 table. */ 246 unsigned long hash; 247 }; 248 249 /* A hash table. */ 250 251 struct bfd_hash_table 252 { 253 /* The hash array. */ 254 struct bfd_hash_entry **table; 255 /* A function used to create new elements in the hash table. The 256 first entry is itself a pointer to an element. When this 257 function is first invoked, this pointer will be NULL. However, 258 having the pointer permits a hierarchy of method functions to be 259 built each of which calls the function in the superclass. Thus 260 each function should be written to allocate a new block of memory 261 only if the argument is NULL. */ 262 struct bfd_hash_entry *(*newfunc) 263 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *); 264 /* An objalloc for this hash table. This is a struct objalloc *, 265 but we use void * to avoid requiring the inclusion of objalloc.h. */ 266 void *memory; 267 /* The number of slots in the hash table. */ 268 unsigned int size; 269 /* The number of entries in the hash table. */ 270 unsigned int count; 271 /* The size of elements. */ 272 unsigned int entsize; 273 /* If non-zero, don't grow the hash table. */ 274 unsigned int frozen:1; 275 }; 276 277 /* Initialize a hash table. */ 278 extern bool bfd_hash_table_init 279 (struct bfd_hash_table *, 280 struct bfd_hash_entry *(*) (struct bfd_hash_entry *, 281 struct bfd_hash_table *, 282 const char *), 283 unsigned int); 284 285 /* Initialize a hash table specifying a size. */ 286 extern bool bfd_hash_table_init_n 287 (struct bfd_hash_table *, 288 struct bfd_hash_entry *(*) (struct bfd_hash_entry *, 289 struct bfd_hash_table *, 290 const char *), 291 unsigned int, unsigned int); 292 293 /* Free up a hash table. */ 294 extern void bfd_hash_table_free 295 (struct bfd_hash_table *); 296 297 /* Look up a string in a hash table. If CREATE is TRUE, a new entry 298 will be created for this string if one does not already exist. The 299 COPY argument must be TRUE if this routine should copy the string 300 into newly allocated memory when adding an entry. */ 301 extern struct bfd_hash_entry *bfd_hash_lookup 302 (struct bfd_hash_table *, const char *, bool create, bool copy); 303 304 /* Insert an entry in a hash table. */ 305 extern struct bfd_hash_entry *bfd_hash_insert 306 (struct bfd_hash_table *, const char *, unsigned long); 307 308 /* Rename an entry in a hash table. */ 309 extern void bfd_hash_rename 310 (struct bfd_hash_table *, const char *, struct bfd_hash_entry *); 311 312 /* Replace an entry in a hash table. */ 313 extern void bfd_hash_replace 314 (struct bfd_hash_table *, struct bfd_hash_entry *old, 315 struct bfd_hash_entry *nw); 316 317 /* Base method for creating a hash table entry. */ 318 extern struct bfd_hash_entry *bfd_hash_newfunc 319 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *); 320 321 /* Grab some space for a hash table entry. */ 322 extern void *bfd_hash_allocate 323 (struct bfd_hash_table *, unsigned int); 324 325 /* Traverse a hash table in a random order, calling a function on each 326 element. If the function returns FALSE, the traversal stops. The 327 INFO argument is passed to the function. */ 328 extern void bfd_hash_traverse 329 (struct bfd_hash_table *, 330 bool (*) (struct bfd_hash_entry *, void *), 331 void *info); 332 333 /* Allows the default size of a hash table to be configured. New hash 334 tables allocated using bfd_hash_table_init will be created with 335 this size. */ 336 extern unsigned long bfd_hash_set_default_size (unsigned long); 337 338 /* This structure is used to keep track of stabs in sections 339 information while linking. */ 340 341 struct stab_info 342 { 343 /* A hash table used to hold stabs strings. */ 344 struct bfd_strtab_hash *strings; 345 /* The header file hash table. */ 346 struct bfd_hash_table includes; 347 /* The first .stabstr section. */ 348 struct bfd_section *stabstr; 349 }; 350 351 #define COFF_SWAP_TABLE (void *) &bfd_coff_std_swap_table 352 353 /* User program access to BFD facilities. */ 354 355 /* Direct I/O routines, for programs which know more about the object 356 file than BFD does. Use higher level routines if possible. */ 357 358 extern bfd_size_type bfd_bread (void *, bfd_size_type, bfd *); 359 extern bfd_size_type bfd_bwrite (const void *, bfd_size_type, bfd *); 360 extern int bfd_seek (bfd *, file_ptr, int); 361 extern file_ptr bfd_tell (bfd *); 362 extern int bfd_flush (bfd *); 363 extern int bfd_stat (bfd *, struct stat *); 364 365 /* Deprecated old routines. */ 366 #if __GNUC__ 367 #define bfd_read(BUF, ELTSIZE, NITEMS, ABFD) \ 368 (_bfd_warn_deprecated ("bfd_read", __FILE__, __LINE__, __FUNCTION__), \ 369 bfd_bread ((BUF), (ELTSIZE) * (NITEMS), (ABFD))) 370 #define bfd_write(BUF, ELTSIZE, NITEMS, ABFD) \ 371 (_bfd_warn_deprecated ("bfd_write", __FILE__, __LINE__, __FUNCTION__), \ 372 bfd_bwrite ((BUF), (ELTSIZE) * (NITEMS), (ABFD))) 373 #else 374 #define bfd_read(BUF, ELTSIZE, NITEMS, ABFD) \ 375 (_bfd_warn_deprecated ("bfd_read", (const char *) 0, 0, (const char *) 0), \ 376 bfd_bread ((BUF), (ELTSIZE) * (NITEMS), (ABFD))) 377 #define bfd_write(BUF, ELTSIZE, NITEMS, ABFD) \ 378 (_bfd_warn_deprecated ("bfd_write", (const char *) 0, 0, (const char *) 0),\ 379 bfd_bwrite ((BUF), (ELTSIZE) * (NITEMS), (ABFD))) 380 #endif 381 extern void _bfd_warn_deprecated (const char *, const char *, int, const char *); 382 383 extern bool bfd_cache_close 384 (bfd *abfd); 385 /* NB: This declaration should match the autogenerated one in libbfd.h. */ 386 387 extern bool bfd_cache_close_all (void); 388 389 extern bool bfd_record_phdr 390 (bfd *, unsigned long, bool, flagword, bool, bfd_vma, 391 bool, bool, unsigned int, struct bfd_section **); 392 393 /* Byte swapping routines. */ 394 395 uint64_t bfd_getb64 (const void *); 396 uint64_t bfd_getl64 (const void *); 397 int64_t bfd_getb_signed_64 (const void *); 398 int64_t bfd_getl_signed_64 (const void *); 399 bfd_vma bfd_getb32 (const void *); 400 bfd_vma bfd_getl32 (const void *); 401 bfd_signed_vma bfd_getb_signed_32 (const void *); 402 bfd_signed_vma bfd_getl_signed_32 (const void *); 403 bfd_vma bfd_getb16 (const void *); 404 bfd_vma bfd_getl16 (const void *); 405 bfd_signed_vma bfd_getb_signed_16 (const void *); 406 bfd_signed_vma bfd_getl_signed_16 (const void *); 407 void bfd_putb64 (uint64_t, void *); 408 void bfd_putl64 (uint64_t, void *); 409 void bfd_putb32 (bfd_vma, void *); 410 void bfd_putl32 (bfd_vma, void *); 411 void bfd_putb24 (bfd_vma, void *); 412 void bfd_putl24 (bfd_vma, void *); 413 void bfd_putb16 (bfd_vma, void *); 414 void bfd_putl16 (bfd_vma, void *); 415 416 /* Byte swapping routines which take size and endiannes as arguments. */ 417 418 uint64_t bfd_get_bits (const void *, int, bool); 419 void bfd_put_bits (uint64_t, void *, int, bool); 420 421 422 /* mmap hacks */ 423 424 struct _bfd_window_internal; 425 typedef struct _bfd_window_internal bfd_window_internal; 426 427 typedef struct _bfd_window 428 { 429 /* What the user asked for. */ 430 void *data; 431 bfd_size_type size; 432 /* The actual window used by BFD. Small user-requested read-only 433 regions sharing a page may share a single window into the object 434 file. Read-write versions shouldn't until I've fixed things to 435 keep track of which portions have been claimed by the 436 application; don't want to give the same region back when the 437 application wants two writable copies! */ 438 struct _bfd_window_internal *i; 439 } 440 bfd_window; 441 442 extern void bfd_init_window 443 (bfd_window *); 444 extern void bfd_free_window 445 (bfd_window *); 446 extern bool bfd_get_file_window 447 (bfd *, file_ptr, bfd_size_type, bfd_window *, bool); 448 449 /* Externally visible ELF routines. */ 450 451 /* Create a new BFD as if by bfd_openr. Rather than opening a file, 452 reconstruct an ELF file by reading the segments out of remote 453 memory based on the ELF file header at EHDR_VMA and the ELF program 454 headers it points to. If non-zero, SIZE is the known extent of the 455 object. If not null, *LOADBASEP is filled in with the difference 456 between the VMAs from which the segments were read, and the VMAs 457 the file headers (and hence BFD's idea of each section's VMA) put 458 them at. 459 460 The function TARGET_READ_MEMORY is called to copy LEN bytes from 461 the remote memory at target address VMA into the local buffer at 462 MYADDR; it should return zero on success or an `errno' code on 463 failure. TEMPL must be a BFD for a target with the word size and 464 byte order found in the remote memory. */ 465 extern bfd *bfd_elf_bfd_from_remote_memory 466 (bfd *templ, bfd_vma ehdr_vma, bfd_size_type size, bfd_vma *loadbasep, 467 int (*target_read_memory) (bfd_vma vma, bfd_byte *myaddr, 468 bfd_size_type len)); 469 470 /* Forward declarations. */ 471 struct ecoff_debug_info; 472 struct ecoff_debug_swap; 473 struct ecoff_extr; 474 struct bfd_link_info; 475 struct bfd_link_hash_entry; 476 477 /* Return TRUE if the start of STR matches PREFIX, FALSE otherwise. */ 478 479 static inline bool 480 startswith (const char *str, const char *prefix) 481 { 482 return strncmp (str, prefix, strlen (prefix)) == 0; 483 } 484