| 1 | /* `a.out' object-file definitions, including extensions to 64-bit fields
|
|---|
| 2 |
|
|---|
| 3 | Copyright 2001, 2003 Free Software Foundation, Inc.
|
|---|
| 4 |
|
|---|
| 5 | This program is free software; you can redistribute it and/or modify
|
|---|
| 6 | it under the terms of the GNU General Public License as published by
|
|---|
| 7 | the Free Software Foundation; either version 2 of the License, or
|
|---|
| 8 | (at your option) any later version.
|
|---|
| 9 |
|
|---|
| 10 | This program is distributed in the hope that it will be useful,
|
|---|
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|---|
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|---|
| 13 | GNU General Public License for more details.
|
|---|
| 14 |
|
|---|
| 15 | You should have received a copy of the GNU General Public License
|
|---|
| 16 | along with this program; if not, write to the Free Software
|
|---|
| 17 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
|---|
| 18 |
|
|---|
| 19 | #ifndef __A_OUT_64_H__
|
|---|
| 20 | #define __A_OUT_64_H__
|
|---|
| 21 |
|
|---|
| 22 | #ifndef BYTES_IN_WORD
|
|---|
| 23 | #define BYTES_IN_WORD 4
|
|---|
| 24 | #endif
|
|---|
| 25 |
|
|---|
| 26 | /* This is the layout on disk of the 32-bit or 64-bit exec header. */
|
|---|
| 27 |
|
|---|
| 28 | #ifndef external_exec
|
|---|
| 29 | struct external_exec
|
|---|
| 30 | {
|
|---|
| 31 | bfd_byte e_info[4]; /* Magic number and stuff. */
|
|---|
| 32 | bfd_byte e_text[BYTES_IN_WORD]; /* Length of text section in bytes. */
|
|---|
| 33 | bfd_byte e_data[BYTES_IN_WORD]; /* Length of data section in bytes. */
|
|---|
| 34 | bfd_byte e_bss[BYTES_IN_WORD]; /* Length of bss area in bytes. */
|
|---|
| 35 | bfd_byte e_syms[BYTES_IN_WORD]; /* Length of symbol table in bytes. */
|
|---|
| 36 | bfd_byte e_entry[BYTES_IN_WORD]; /* Start address. */
|
|---|
| 37 | bfd_byte e_trsize[BYTES_IN_WORD]; /* Length of text relocation info. */
|
|---|
| 38 | bfd_byte e_drsize[BYTES_IN_WORD]; /* Length of data relocation info. */
|
|---|
| 39 | };
|
|---|
| 40 |
|
|---|
| 41 | #define EXEC_BYTES_SIZE (4 + BYTES_IN_WORD * 7)
|
|---|
| 42 |
|
|---|
| 43 | /* Magic numbers for a.out files. */
|
|---|
| 44 |
|
|---|
| 45 | #if ARCH_SIZE==64
|
|---|
| 46 | #define OMAGIC 0x1001 /* Code indicating object file. */
|
|---|
| 47 | #define ZMAGIC 0x1002 /* Code indicating demand-paged executable. */
|
|---|
| 48 | #define NMAGIC 0x1003 /* Code indicating pure executable. */
|
|---|
| 49 |
|
|---|
| 50 | /* There is no 64-bit QMAGIC as far as I know. */
|
|---|
| 51 |
|
|---|
| 52 | #define N_BADMAG(x) (N_MAGIC(x) != OMAGIC \
|
|---|
| 53 | && N_MAGIC(x) != NMAGIC \
|
|---|
| 54 | && N_MAGIC(x) != ZMAGIC)
|
|---|
| 55 | #else
|
|---|
| 56 | #define OMAGIC 0407 /* Object file or impure executable. */
|
|---|
| 57 | #define NMAGIC 0410 /* Code indicating pure executable. */
|
|---|
| 58 | #define ZMAGIC 0413 /* Code indicating demand-paged executable. */
|
|---|
| 59 | #define BMAGIC 0415 /* Used by a b.out object. */
|
|---|
| 60 |
|
|---|
| 61 | /* This indicates a demand-paged executable with the header in the text.
|
|---|
| 62 | It is used by 386BSD (and variants) and Linux, at least. */
|
|---|
| 63 | #ifndef QMAGIC
|
|---|
| 64 | #define QMAGIC 0314
|
|---|
| 65 | #endif
|
|---|
| 66 | # ifndef N_BADMAG
|
|---|
| 67 | # define N_BADMAG(x) (N_MAGIC(x) != OMAGIC \
|
|---|
| 68 | && N_MAGIC(x) != NMAGIC \
|
|---|
| 69 | && N_MAGIC(x) != ZMAGIC \
|
|---|
| 70 | && N_MAGIC(x) != QMAGIC)
|
|---|
| 71 | # endif /* N_BADMAG */
|
|---|
| 72 | #endif
|
|---|
| 73 |
|
|---|
| 74 | #endif
|
|---|
| 75 |
|
|---|
| 76 | #ifdef QMAGIC
|
|---|
| 77 | #define N_IS_QMAGIC(x) (N_MAGIC (x) == QMAGIC)
|
|---|
| 78 | #else
|
|---|
| 79 | #define N_IS_QMAGIC(x) (0)
|
|---|
| 80 | #endif
|
|---|
| 81 |
|
|---|
| 82 | /* The difference between TARGET_PAGE_SIZE and N_SEGSIZE is that TARGET_PAGE_SIZE is
|
|---|
| 83 | the finest granularity at which you can page something, thus it
|
|---|
| 84 | controls the padding (if any) before the text segment of a ZMAGIC
|
|---|
| 85 | file. N_SEGSIZE is the resolution at which things can be marked as
|
|---|
| 86 | read-only versus read/write, so it controls the padding between the
|
|---|
| 87 | text segment and the data segment (in memory; on disk the padding
|
|---|
| 88 | between them is TARGET_PAGE_SIZE). TARGET_PAGE_SIZE and N_SEGSIZE are the same
|
|---|
| 89 | for most machines, but different for sun3. */
|
|---|
| 90 |
|
|---|
| 91 | /* By default, segment size is constant. But some machines override this
|
|---|
| 92 | to be a function of the a.out header (e.g. machine type). */
|
|---|
| 93 |
|
|---|
| 94 | #ifndef N_SEGSIZE
|
|---|
| 95 | #define N_SEGSIZE(x) SEGMENT_SIZE
|
|---|
| 96 | #endif
|
|---|
| 97 | |
|---|
| 98 |
|
|---|
| 99 | /* Virtual memory address of the text section.
|
|---|
| 100 | This is getting very complicated. A good reason to discard a.out format
|
|---|
| 101 | for something that specifies these fields explicitly. But til then...
|
|---|
| 102 |
|
|---|
| 103 | * OMAGIC and NMAGIC files:
|
|---|
| 104 | (object files: text for "relocatable addr 0" right after the header)
|
|---|
| 105 | start at 0, offset is EXEC_BYTES_SIZE, size as stated.
|
|---|
| 106 | * The text address, offset, and size of ZMAGIC files depend
|
|---|
| 107 | on the entry point of the file:
|
|---|
| 108 | * entry point below TEXT_START_ADDR:
|
|---|
| 109 | (hack for SunOS shared libraries)
|
|---|
| 110 | start at 0, offset is 0, size as stated.
|
|---|
| 111 | * If N_HEADER_IN_TEXT(x) is true (which defaults to being the
|
|---|
| 112 | case when the entry point is EXEC_BYTES_SIZE or further into a page):
|
|---|
| 113 | no padding is needed; text can start after exec header. Sun
|
|---|
| 114 | considers the text segment of such files to include the exec header;
|
|---|
| 115 | for BFD's purposes, we don't, which makes more work for us.
|
|---|
| 116 | start at TEXT_START_ADDR + EXEC_BYTES_SIZE, offset is EXEC_BYTES_SIZE,
|
|---|
| 117 | size as stated minus EXEC_BYTES_SIZE.
|
|---|
| 118 | * If N_HEADER_IN_TEXT(x) is false (which defaults to being the case when
|
|---|
| 119 | the entry point is less than EXEC_BYTES_SIZE into a page (e.g. page
|
|---|
| 120 | aligned)): (padding is needed so that text can start at a page boundary)
|
|---|
| 121 | start at TEXT_START_ADDR, offset TARGET_PAGE_SIZE, size as stated.
|
|---|
| 122 |
|
|---|
| 123 | Specific configurations may want to hardwire N_HEADER_IN_TEXT,
|
|---|
| 124 | for efficiency or to allow people to play games with the entry point.
|
|---|
| 125 | In that case, you would #define N_HEADER_IN_TEXT(x) as 1 for sunos,
|
|---|
| 126 | and as 0 for most other hosts (Sony News, Vax Ultrix, etc).
|
|---|
| 127 | (Do this in the appropriate bfd target file.)
|
|---|
| 128 | (The default is a heuristic that will break if people try changing
|
|---|
| 129 | the entry point, perhaps with the ld -e flag.)
|
|---|
| 130 |
|
|---|
| 131 | * QMAGIC is always like a ZMAGIC for which N_HEADER_IN_TEXT is true,
|
|---|
| 132 | and for which the starting address is TARGET_PAGE_SIZE (or should this be
|
|---|
| 133 | SEGMENT_SIZE?) (TEXT_START_ADDR only applies to ZMAGIC, not to QMAGIC). */
|
|---|
| 134 |
|
|---|
| 135 | /* This macro is only relevant for ZMAGIC files; QMAGIC always has the header
|
|---|
| 136 | in the text. */
|
|---|
| 137 | #ifndef N_HEADER_IN_TEXT
|
|---|
| 138 | #define N_HEADER_IN_TEXT(x) \
|
|---|
| 139 | (((x).a_entry & (TARGET_PAGE_SIZE-1)) >= EXEC_BYTES_SIZE)
|
|---|
| 140 | #endif
|
|---|
| 141 |
|
|---|
| 142 | /* Sun shared libraries, not linux. This macro is only relevant for ZMAGIC
|
|---|
| 143 | files. */
|
|---|
| 144 | #ifndef N_SHARED_LIB
|
|---|
| 145 | #if defined (TEXT_START_ADDR) && TEXT_START_ADDR == 0
|
|---|
| 146 | #define N_SHARED_LIB(x) (0)
|
|---|
| 147 | #else
|
|---|
| 148 | #define N_SHARED_LIB(x) ((x).a_entry < TEXT_START_ADDR)
|
|---|
| 149 | #endif
|
|---|
| 150 | #endif
|
|---|
| 151 |
|
|---|
| 152 | /* Returning 0 not TEXT_START_ADDR for OMAGIC and NMAGIC is based on
|
|---|
| 153 | the assumption that we are dealing with a .o file, not an
|
|---|
| 154 | executable. This is necessary for OMAGIC (but means we don't work
|
|---|
| 155 | right on the output from ld -N); more questionable for NMAGIC. */
|
|---|
| 156 |
|
|---|
| 157 | #ifndef N_TXTADDR
|
|---|
| 158 | #define N_TXTADDR(x) \
|
|---|
| 159 | (/* The address of a QMAGIC file is always one page in, \
|
|---|
| 160 | with the header in the text. */ \
|
|---|
| 161 | N_IS_QMAGIC (x) \
|
|---|
| 162 | ? (bfd_vma) TARGET_PAGE_SIZE + EXEC_BYTES_SIZE \
|
|---|
| 163 | : (N_MAGIC (x) != ZMAGIC \
|
|---|
| 164 | ? (bfd_vma) 0 /* Object file or NMAGIC. */ \
|
|---|
| 165 | : (N_SHARED_LIB (x) \
|
|---|
| 166 | ? (bfd_vma) 0 \
|
|---|
| 167 | : (N_HEADER_IN_TEXT (x) \
|
|---|
| 168 | ? (bfd_vma) TEXT_START_ADDR + EXEC_BYTES_SIZE \
|
|---|
| 169 | : (bfd_vma) TEXT_START_ADDR))))
|
|---|
| 170 | #endif
|
|---|
| 171 |
|
|---|
| 172 | /* If N_HEADER_IN_TEXT is not true for ZMAGIC, there is some padding
|
|---|
| 173 | to make the text segment start at a certain boundary. For most
|
|---|
| 174 | systems, this boundary is TARGET_PAGE_SIZE. But for Linux, in the
|
|---|
| 175 | time-honored tradition of crazy ZMAGIC hacks, it is 1024 which is
|
|---|
| 176 | not what TARGET_PAGE_SIZE needs to be for QMAGIC. */
|
|---|
| 177 |
|
|---|
| 178 | #ifndef ZMAGIC_DISK_BLOCK_SIZE
|
|---|
| 179 | #define ZMAGIC_DISK_BLOCK_SIZE TARGET_PAGE_SIZE
|
|---|
| 180 | #endif
|
|---|
| 181 |
|
|---|
| 182 | #define N_DISK_BLOCK_SIZE(x) \
|
|---|
| 183 | (N_MAGIC(x) == ZMAGIC ? ZMAGIC_DISK_BLOCK_SIZE : TARGET_PAGE_SIZE)
|
|---|
| 184 |
|
|---|
| 185 | /* Offset in an a.out of the start of the text section. */
|
|---|
| 186 | #ifndef N_TXTOFF
|
|---|
| 187 | #define N_TXTOFF(x) \
|
|---|
| 188 | (/* For {O,N,Q}MAGIC, no padding. */ \
|
|---|
| 189 | N_MAGIC (x) != ZMAGIC \
|
|---|
| 190 | ? EXEC_BYTES_SIZE \
|
|---|
| 191 | : (N_SHARED_LIB (x) \
|
|---|
| 192 | ? 0 \
|
|---|
| 193 | : (N_HEADER_IN_TEXT (x) \
|
|---|
| 194 | ? EXEC_BYTES_SIZE /* No padding. */ \
|
|---|
| 195 | : ZMAGIC_DISK_BLOCK_SIZE /* A page of padding. */)))
|
|---|
| 196 | #endif
|
|---|
| 197 | /* Size of the text section. It's always as stated, except that we
|
|---|
| 198 | offset it to `undo' the adjustment to N_TXTADDR and N_TXTOFF
|
|---|
| 199 | for ZMAGIC files that nominally include the exec header
|
|---|
| 200 | as part of the first page of text. (BFD doesn't consider the
|
|---|
| 201 | exec header to be part of the text segment.) */
|
|---|
| 202 | #ifndef N_TXTSIZE
|
|---|
| 203 | #define N_TXTSIZE(x) \
|
|---|
| 204 | (/* For QMAGIC, we don't consider the header part of the text section. */\
|
|---|
| 205 | N_IS_QMAGIC (x) \
|
|---|
| 206 | ? (x).a_text - EXEC_BYTES_SIZE \
|
|---|
| 207 | : ((N_MAGIC (x) != ZMAGIC || N_SHARED_LIB (x)) \
|
|---|
| 208 | ? (x).a_text \
|
|---|
| 209 | : (N_HEADER_IN_TEXT (x) \
|
|---|
| 210 | ? (x).a_text - EXEC_BYTES_SIZE /* No padding. */ \
|
|---|
| 211 | : (x).a_text /* A page of padding. */ )))
|
|---|
| 212 | #endif
|
|---|
| 213 | /* The address of the data segment in virtual memory.
|
|---|
| 214 | It is the text segment address, plus text segment size, rounded
|
|---|
| 215 | up to a N_SEGSIZE boundary for pure or pageable files. */
|
|---|
| 216 | #ifndef N_DATADDR
|
|---|
| 217 | #define N_DATADDR(x) \
|
|---|
| 218 | (N_MAGIC (x) == OMAGIC \
|
|---|
| 219 | ? (N_TXTADDR (x) + N_TXTSIZE (x)) \
|
|---|
| 220 | : (N_SEGSIZE (x) + ((N_TXTADDR (x) + N_TXTSIZE (x) - 1) \
|
|---|
| 221 | & ~ (bfd_vma) (N_SEGSIZE (x) - 1))))
|
|---|
| 222 | #endif
|
|---|
| 223 | /* The address of the BSS segment -- immediately after the data segment. */
|
|---|
| 224 |
|
|---|
| 225 | #define N_BSSADDR(x) (N_DATADDR (x) + (x).a_data)
|
|---|
| 226 |
|
|---|
| 227 | /* Offsets of the various portions of the file after the text segment. */
|
|---|
| 228 |
|
|---|
| 229 | /* For {Q,Z}MAGIC, there is padding to make the data segment start on
|
|---|
| 230 | a page boundary. Most of the time the a_text field (and thus
|
|---|
| 231 | N_TXTSIZE) already contains this padding. It is possible that for
|
|---|
| 232 | BSDI and/or 386BSD it sometimes doesn't contain the padding, and
|
|---|
| 233 | perhaps we should be adding it here. But this seems kind of
|
|---|
| 234 | questionable and probably should be BSDI/386BSD-specific if we do
|
|---|
| 235 | do it.
|
|---|
| 236 |
|
|---|
| 237 | For NMAGIC (at least for hp300 BSD, probably others), there is
|
|---|
| 238 | padding in memory only, not on disk, so we must *not* ever pad here
|
|---|
| 239 | for NMAGIC. */
|
|---|
| 240 |
|
|---|
| 241 | #ifndef N_DATOFF
|
|---|
| 242 | #define N_DATOFF(x) (N_TXTOFF (x) + N_TXTSIZE (x))
|
|---|
| 243 | #endif
|
|---|
| 244 | #ifndef N_TRELOFF
|
|---|
| 245 | #define N_TRELOFF(x) (N_DATOFF (x) + (x).a_data)
|
|---|
| 246 | #endif
|
|---|
| 247 | #ifndef N_DRELOFF
|
|---|
| 248 | #define N_DRELOFF(x) (N_TRELOFF (x) + (x).a_trsize)
|
|---|
| 249 | #endif
|
|---|
| 250 | #ifndef N_SYMOFF
|
|---|
| 251 | #define N_SYMOFF(x) (N_DRELOFF (x) + (x).a_drsize)
|
|---|
| 252 | #endif
|
|---|
| 253 | #ifndef N_STROFF
|
|---|
| 254 | #define N_STROFF(x) (N_SYMOFF (x) + (x).a_syms)
|
|---|
| 255 | #endif
|
|---|
| 256 | |
|---|
| 257 |
|
|---|
| 258 | /* Symbols */
|
|---|
| 259 | #ifndef external_nlist
|
|---|
| 260 | struct external_nlist
|
|---|
| 261 | {
|
|---|
| 262 | bfd_byte e_strx[BYTES_IN_WORD]; /* Index into string table of name. */
|
|---|
| 263 | bfd_byte e_type[1]; /* Type of symbol. */
|
|---|
| 264 | bfd_byte e_other[1]; /* Misc info (usually empty). */
|
|---|
| 265 | bfd_byte e_desc[2]; /* Description field. */
|
|---|
| 266 | bfd_byte e_value[BYTES_IN_WORD]; /* Value of symbol. */
|
|---|
| 267 | };
|
|---|
| 268 | #define EXTERNAL_NLIST_SIZE (BYTES_IN_WORD+4+BYTES_IN_WORD)
|
|---|
| 269 | #endif
|
|---|
| 270 |
|
|---|
| 271 | struct internal_nlist
|
|---|
| 272 | {
|
|---|
| 273 | unsigned long n_strx; /* Index into string table of name. */
|
|---|
| 274 | unsigned char n_type; /* Type of symbol. */
|
|---|
| 275 | unsigned char n_other; /* Misc info (usually empty). */
|
|---|
| 276 | unsigned short n_desc; /* Description field. */
|
|---|
| 277 | bfd_vma n_value; /* Value of symbol. */
|
|---|
| 278 | };
|
|---|
| 279 |
|
|---|
| 280 | /* The n_type field is the symbol type, containing: */
|
|---|
| 281 |
|
|---|
| 282 | #define N_UNDF 0 /* Undefined symbol. */
|
|---|
| 283 | #define N_ABS 2 /* Absolute symbol -- defined at particular addr. */
|
|---|
| 284 | #define N_TEXT 4 /* Text sym -- defined at offset in text seg. */
|
|---|
| 285 | #define N_DATA 6 /* Data sym -- defined at offset in data seg. */
|
|---|
| 286 | #define N_BSS 8 /* BSS sym -- defined at offset in zero'd seg. */
|
|---|
| 287 | #define N_COMM 0x12 /* Common symbol (visible after shared lib dynlink). */
|
|---|
| 288 | #define N_FN 0x1f /* File name of .o file. */
|
|---|
| 289 | #define N_FN_SEQ 0x0C /* N_FN from Sequent compilers (sigh). */
|
|---|
| 290 | /* Note: N_EXT can only be usefully OR-ed with N_UNDF, N_ABS, N_TEXT,
|
|---|
| 291 | N_DATA, or N_BSS. When the low-order bit of other types is set,
|
|---|
| 292 | (e.g. N_WARNING versus N_FN), they are two different types. */
|
|---|
| 293 | #define N_EXT 1 /* External symbol (as opposed to local-to-this-file). */
|
|---|
| 294 | #define N_TYPE 0x1e
|
|---|
| 295 | #define N_STAB 0xe0 /* If any of these bits are on, it's a debug symbol. */
|
|---|
| 296 |
|
|---|
| 297 | #define N_INDR 0x0a
|
|---|
| 298 |
|
|---|
| 299 | /* The following symbols refer to set elements.
|
|---|
| 300 | All the N_SET[ATDB] symbols with the same name form one set.
|
|---|
| 301 | Space is allocated for the set in the text section, and each set
|
|---|
| 302 | elements value is stored into one word of the space.
|
|---|
| 303 | The first word of the space is the length of the set (number of elements).
|
|---|
| 304 |
|
|---|
| 305 | The address of the set is made into an N_SETV symbol
|
|---|
| 306 | whose name is the same as the name of the set.
|
|---|
| 307 | This symbol acts like a N_DATA global symbol
|
|---|
| 308 | in that it can satisfy undefined external references. */
|
|---|
| 309 |
|
|---|
| 310 | /* These appear as input to LD, in a .o file. */
|
|---|
| 311 | #define N_SETA 0x14 /* Absolute set element symbol. */
|
|---|
| 312 | #define N_SETT 0x16 /* Text set element symbol. */
|
|---|
| 313 | #define N_SETD 0x18 /* Data set element symbol. */
|
|---|
| 314 | #define N_SETB 0x1A /* Bss set element symbol. */
|
|---|
| 315 |
|
|---|
| 316 | /* This is output from LD. */
|
|---|
| 317 | #define N_SETV 0x1C /* Pointer to set vector in data area. */
|
|---|
| 318 |
|
|---|
| 319 | /* Warning symbol. The text gives a warning message, the next symbol
|
|---|
| 320 | in the table will be undefined. When the symbol is referenced, the
|
|---|
| 321 | message is printed. */
|
|---|
| 322 |
|
|---|
| 323 | #define N_WARNING 0x1e
|
|---|
| 324 |
|
|---|
| 325 | /* Weak symbols. These are a GNU extension to the a.out format. The
|
|---|
| 326 | semantics are those of ELF weak symbols. Weak symbols are always
|
|---|
| 327 | externally visible. The N_WEAK? values are squeezed into the
|
|---|
| 328 | available slots. The value of a N_WEAKU symbol is 0. The values
|
|---|
| 329 | of the other types are the definitions. */
|
|---|
| 330 | #define N_WEAKU 0x0d /* Weak undefined symbol. */
|
|---|
| 331 | #define N_WEAKA 0x0e /* Weak absolute symbol. */
|
|---|
| 332 | #define N_WEAKT 0x0f /* Weak text symbol. */
|
|---|
| 333 | #define N_WEAKD 0x10 /* Weak data symbol. */
|
|---|
| 334 | #define N_WEAKB 0x11 /* Weak bss symbol. */
|
|---|
| 335 |
|
|---|
| 336 | /* Relocations
|
|---|
| 337 |
|
|---|
| 338 | There are two types of relocation flavours for a.out systems,
|
|---|
| 339 | standard and extended. The standard form is used on systems where the
|
|---|
| 340 | instruction has room for all the bits of an offset to the operand, whilst
|
|---|
| 341 | the extended form is used when an address operand has to be split over n
|
|---|
| 342 | instructions. Eg, on the 68k, each move instruction can reference
|
|---|
| 343 | the target with a displacement of 16 or 32 bits. On the sparc, move
|
|---|
| 344 | instructions use an offset of 14 bits, so the offset is stored in
|
|---|
| 345 | the reloc field, and the data in the section is ignored. */
|
|---|
| 346 |
|
|---|
| 347 | /* This structure describes a single relocation to be performed.
|
|---|
| 348 | The text-relocation section of the file is a vector of these structures,
|
|---|
| 349 | all of which apply to the text section.
|
|---|
| 350 | Likewise, the data-relocation section applies to the data section. */
|
|---|
| 351 |
|
|---|
| 352 | struct reloc_std_external
|
|---|
| 353 | {
|
|---|
| 354 | bfd_byte r_address[BYTES_IN_WORD]; /* Offset of of data to relocate. */
|
|---|
| 355 | bfd_byte r_index[3]; /* Symbol table index of symbol. */
|
|---|
| 356 | bfd_byte r_type[1]; /* Relocation type. */
|
|---|
| 357 | };
|
|---|
| 358 |
|
|---|
| 359 | #define RELOC_STD_BITS_PCREL_BIG ((unsigned int) 0x80)
|
|---|
| 360 | #define RELOC_STD_BITS_PCREL_LITTLE ((unsigned int) 0x01)
|
|---|
| 361 |
|
|---|
| 362 | #define RELOC_STD_BITS_LENGTH_BIG ((unsigned int) 0x60)
|
|---|
| 363 | #define RELOC_STD_BITS_LENGTH_SH_BIG 5
|
|---|
| 364 | #define RELOC_STD_BITS_LENGTH_LITTLE ((unsigned int) 0x06)
|
|---|
| 365 | #define RELOC_STD_BITS_LENGTH_SH_LITTLE 1
|
|---|
| 366 |
|
|---|
| 367 | #define RELOC_STD_BITS_EXTERN_BIG ((unsigned int) 0x10)
|
|---|
| 368 | #define RELOC_STD_BITS_EXTERN_LITTLE ((unsigned int) 0x08)
|
|---|
| 369 |
|
|---|
| 370 | #define RELOC_STD_BITS_BASEREL_BIG ((unsigned int) 0x08)
|
|---|
| 371 | #define RELOC_STD_BITS_BASEREL_LITTLE ((unsigned int) 0x10)
|
|---|
| 372 |
|
|---|
| 373 | #define RELOC_STD_BITS_JMPTABLE_BIG ((unsigned int) 0x04)
|
|---|
| 374 | #define RELOC_STD_BITS_JMPTABLE_LITTLE ((unsigned int) 0x20)
|
|---|
| 375 |
|
|---|
| 376 | #define RELOC_STD_BITS_RELATIVE_BIG ((unsigned int) 0x02)
|
|---|
| 377 | #define RELOC_STD_BITS_RELATIVE_LITTLE ((unsigned int) 0x40)
|
|---|
| 378 |
|
|---|
| 379 | #define RELOC_STD_SIZE (BYTES_IN_WORD + 3 + 1) /* Bytes per relocation entry. */
|
|---|
| 380 |
|
|---|
| 381 | struct reloc_std_internal
|
|---|
| 382 | {
|
|---|
| 383 | bfd_vma r_address; /* Address (within segment) to be relocated. */
|
|---|
| 384 | /* The meaning of r_symbolnum depends on r_extern. */
|
|---|
| 385 | unsigned int r_symbolnum:24;
|
|---|
| 386 | /* Nonzero means value is a pc-relative offset
|
|---|
| 387 | and it should be relocated for changes in its own address
|
|---|
| 388 | as well as for changes in the symbol or section specified. */
|
|---|
| 389 | unsigned int r_pcrel:1;
|
|---|
| 390 | /* Length (as exponent of 2) of the field to be relocated.
|
|---|
| 391 | Thus, a value of 2 indicates 1<<2 bytes. */
|
|---|
| 392 | unsigned int r_length:2;
|
|---|
| 393 | /* 1 => relocate with value of symbol.
|
|---|
| 394 | r_symbolnum is the index of the symbol
|
|---|
| 395 | in files the symbol table.
|
|---|
| 396 | 0 => relocate with the address of a segment.
|
|---|
| 397 | r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS
|
|---|
| 398 | (the N_EXT bit may be set also, but signifies nothing). */
|
|---|
| 399 | unsigned int r_extern:1;
|
|---|
| 400 | /* The next three bits are for SunOS shared libraries, and seem to
|
|---|
| 401 | be undocumented. */
|
|---|
| 402 | unsigned int r_baserel:1; /* Linkage table relative. */
|
|---|
| 403 | unsigned int r_jmptable:1; /* pc-relative to jump table. */
|
|---|
| 404 | unsigned int r_relative:1; /* "relative relocation". */
|
|---|
| 405 | /* unused */
|
|---|
| 406 | unsigned int r_pad:1; /* Padding -- set to zero. */
|
|---|
| 407 | };
|
|---|
| 408 |
|
|---|
| 409 |
|
|---|
| 410 | /* EXTENDED RELOCS. */
|
|---|
| 411 |
|
|---|
| 412 | struct reloc_ext_external
|
|---|
| 413 | {
|
|---|
| 414 | bfd_byte r_address[BYTES_IN_WORD]; /* Offset of of data to relocate. */
|
|---|
| 415 | bfd_byte r_index[3]; /* Symbol table index of symbol. */
|
|---|
| 416 | bfd_byte r_type[1]; /* Relocation type. */
|
|---|
| 417 | bfd_byte r_addend[BYTES_IN_WORD]; /* Datum addend. */
|
|---|
| 418 | };
|
|---|
| 419 |
|
|---|
| 420 | #ifndef RELOC_EXT_BITS_EXTERN_BIG
|
|---|
| 421 | #define RELOC_EXT_BITS_EXTERN_BIG ((unsigned int) 0x80)
|
|---|
| 422 | #endif
|
|---|
| 423 |
|
|---|
| 424 | #ifndef RELOC_EXT_BITS_EXTERN_LITTLE
|
|---|
| 425 | #define RELOC_EXT_BITS_EXTERN_LITTLE ((unsigned int) 0x01)
|
|---|
| 426 | #endif
|
|---|
| 427 |
|
|---|
| 428 | #ifndef RELOC_EXT_BITS_TYPE_BIG
|
|---|
| 429 | #define RELOC_EXT_BITS_TYPE_BIG ((unsigned int) 0x1F)
|
|---|
| 430 | #endif
|
|---|
| 431 |
|
|---|
| 432 | #ifndef RELOC_EXT_BITS_TYPE_SH_BIG
|
|---|
| 433 | #define RELOC_EXT_BITS_TYPE_SH_BIG 0
|
|---|
| 434 | #endif
|
|---|
| 435 |
|
|---|
| 436 | #ifndef RELOC_EXT_BITS_TYPE_LITTLE
|
|---|
| 437 | #define RELOC_EXT_BITS_TYPE_LITTLE ((unsigned int) 0xF8)
|
|---|
| 438 | #endif
|
|---|
| 439 |
|
|---|
| 440 | #ifndef RELOC_EXT_BITS_TYPE_SH_LITTLE
|
|---|
| 441 | #define RELOC_EXT_BITS_TYPE_SH_LITTLE 3
|
|---|
| 442 | #endif
|
|---|
| 443 |
|
|---|
| 444 | /* Bytes per relocation entry. */
|
|---|
| 445 | #define RELOC_EXT_SIZE (BYTES_IN_WORD + 3 + 1 + BYTES_IN_WORD)
|
|---|
| 446 |
|
|---|
| 447 | enum reloc_type
|
|---|
| 448 | {
|
|---|
| 449 | /* Simple relocations. */
|
|---|
| 450 | RELOC_8, /* data[0:7] = addend + sv */
|
|---|
| 451 | RELOC_16, /* data[0:15] = addend + sv */
|
|---|
| 452 | RELOC_32, /* data[0:31] = addend + sv */
|
|---|
| 453 | /* PC-rel displacement. */
|
|---|
| 454 | RELOC_DISP8, /* data[0:7] = addend - pc + sv */
|
|---|
| 455 | RELOC_DISP16, /* data[0:15] = addend - pc + sv */
|
|---|
| 456 | RELOC_DISP32, /* data[0:31] = addend - pc + sv */
|
|---|
| 457 | /* Special. */
|
|---|
| 458 | RELOC_WDISP30, /* data[0:29] = (addend + sv - pc)>>2 */
|
|---|
| 459 | RELOC_WDISP22, /* data[0:21] = (addend + sv - pc)>>2 */
|
|---|
| 460 | RELOC_HI22, /* data[0:21] = (addend + sv)>>10 */
|
|---|
| 461 | RELOC_22, /* data[0:21] = (addend + sv) */
|
|---|
| 462 | RELOC_13, /* data[0:12] = (addend + sv) */
|
|---|
| 463 | RELOC_LO10, /* data[0:9] = (addend + sv) */
|
|---|
| 464 | RELOC_SFA_BASE,
|
|---|
| 465 | RELOC_SFA_OFF13,
|
|---|
| 466 | /* P.I.C. (base-relative). */
|
|---|
| 467 | RELOC_BASE10, /* Not sure - maybe we can do this the */
|
|---|
| 468 | RELOC_BASE13, /* right way now */
|
|---|
| 469 | RELOC_BASE22,
|
|---|
| 470 | /* For some sort of pc-rel P.I.C. (?) */
|
|---|
| 471 | RELOC_PC10,
|
|---|
| 472 | RELOC_PC22,
|
|---|
| 473 | /* P.I.C. jump table. */
|
|---|
| 474 | RELOC_JMP_TBL,
|
|---|
| 475 | /* Reputedly for shared libraries somehow. */
|
|---|
| 476 | RELOC_SEGOFF16,
|
|---|
| 477 | RELOC_GLOB_DAT,
|
|---|
| 478 | RELOC_JMP_SLOT,
|
|---|
| 479 | RELOC_RELATIVE,
|
|---|
| 480 |
|
|---|
| 481 | RELOC_11,
|
|---|
| 482 | RELOC_WDISP2_14,
|
|---|
| 483 | RELOC_WDISP19,
|
|---|
| 484 | RELOC_HHI22, /* data[0:21] = (addend + sv) >> 42 */
|
|---|
| 485 | RELOC_HLO10, /* data[0:9] = (addend + sv) >> 32 */
|
|---|
| 486 |
|
|---|
| 487 | /* 29K relocation types. */
|
|---|
| 488 | RELOC_JUMPTARG,
|
|---|
| 489 | RELOC_CONST,
|
|---|
| 490 | RELOC_CONSTH,
|
|---|
| 491 |
|
|---|
| 492 | /* All the new ones I can think of, for sparc v9. */
|
|---|
| 493 | RELOC_64, /* data[0:63] = addend + sv */
|
|---|
| 494 | RELOC_DISP64, /* data[0:63] = addend - pc + sv */
|
|---|
| 495 | RELOC_WDISP21, /* data[0:20] = (addend + sv - pc)>>2 */
|
|---|
| 496 | RELOC_DISP21, /* data[0:20] = addend - pc + sv */
|
|---|
| 497 | RELOC_DISP14, /* data[0:13] = addend - pc + sv */
|
|---|
| 498 | /* Q .
|
|---|
| 499 | What are the other ones,
|
|---|
| 500 | Since this is a clean slate, can we throw away the ones we dont
|
|---|
| 501 | understand ? Should we sort the values ? What about using a
|
|---|
| 502 | microcode format like the 68k ? */
|
|---|
| 503 | NO_RELOC
|
|---|
| 504 | };
|
|---|
| 505 |
|
|---|
| 506 |
|
|---|
| 507 | struct reloc_internal
|
|---|
| 508 | {
|
|---|
| 509 | bfd_vma r_address; /* Offset of of data to relocate. */
|
|---|
| 510 | long r_index; /* Symbol table index of symbol. */
|
|---|
| 511 | enum reloc_type r_type; /* Relocation type. */
|
|---|
| 512 | bfd_vma r_addend; /* Datum addend. */
|
|---|
| 513 | };
|
|---|
| 514 |
|
|---|
| 515 | /* Q.
|
|---|
| 516 | Should the length of the string table be 4 bytes or 8 bytes ?
|
|---|
| 517 |
|
|---|
| 518 | Q.
|
|---|
| 519 | What about archive indexes ? */
|
|---|
| 520 |
|
|---|
| 521 | #endif /* __A_OUT_64_H__ */
|
|---|
