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252b5132 RH |
1 | /* `a.out' object-file definitions, including extensions to 64-bit fields */ |
2 | ||
3 | #ifndef __A_OUT_64_H__ | |
4 | #define __A_OUT_64_H__ | |
5 | ||
6 | /* This is the layout on disk of the 32-bit or 64-bit exec header. */ | |
7 | ||
8 | #ifndef external_exec | |
9 | struct external_exec | |
10 | { | |
11 | bfd_byte e_info[4]; /* magic number and stuff */ | |
12 | bfd_byte e_text[BYTES_IN_WORD]; /* length of text section in bytes */ | |
13 | bfd_byte e_data[BYTES_IN_WORD]; /* length of data section in bytes */ | |
14 | bfd_byte e_bss[BYTES_IN_WORD]; /* length of bss area in bytes */ | |
15 | bfd_byte e_syms[BYTES_IN_WORD]; /* length of symbol table in bytes */ | |
16 | bfd_byte e_entry[BYTES_IN_WORD]; /* start address */ | |
17 | bfd_byte e_trsize[BYTES_IN_WORD]; /* length of text relocation info */ | |
18 | bfd_byte e_drsize[BYTES_IN_WORD]; /* length of data relocation info */ | |
19 | }; | |
20 | ||
21 | #define EXEC_BYTES_SIZE (4 + BYTES_IN_WORD * 7) | |
22 | ||
23 | /* Magic numbers for a.out files */ | |
24 | ||
25 | #if ARCH_SIZE==64 | |
26 | #define OMAGIC 0x1001 /* Code indicating object file */ | |
27 | #define ZMAGIC 0x1002 /* Code indicating demand-paged executable. */ | |
28 | #define NMAGIC 0x1003 /* Code indicating pure executable. */ | |
29 | ||
30 | /* There is no 64-bit QMAGIC as far as I know. */ | |
31 | ||
32 | #define N_BADMAG(x) (N_MAGIC(x) != OMAGIC \ | |
33 | && N_MAGIC(x) != NMAGIC \ | |
34 | && N_MAGIC(x) != ZMAGIC) | |
35 | #else | |
36 | #define OMAGIC 0407 /* ...object file or impure executable. */ | |
37 | #define NMAGIC 0410 /* Code indicating pure executable. */ | |
38 | #define ZMAGIC 0413 /* Code indicating demand-paged executable. */ | |
39 | #define BMAGIC 0415 /* Used by a b.out object. */ | |
40 | ||
41 | /* This indicates a demand-paged executable with the header in the text. | |
42 | It is used by 386BSD (and variants) and Linux, at least. */ | |
43 | #ifndef QMAGIC | |
44 | #define QMAGIC 0314 | |
45 | #endif | |
46 | # ifndef N_BADMAG | |
47 | # define N_BADMAG(x) (N_MAGIC(x) != OMAGIC \ | |
48 | && N_MAGIC(x) != NMAGIC \ | |
49 | && N_MAGIC(x) != ZMAGIC \ | |
50 | && N_MAGIC(x) != QMAGIC) | |
51 | # endif /* N_BADMAG */ | |
52 | #endif | |
53 | ||
54 | #endif | |
55 | ||
56 | #ifdef QMAGIC | |
57 | #define N_IS_QMAGIC(x) (N_MAGIC (x) == QMAGIC) | |
58 | #else | |
59 | #define N_IS_QMAGIC(x) (0) | |
60 | #endif | |
61 | ||
62 | /* The difference between TARGET_PAGE_SIZE and N_SEGSIZE is that TARGET_PAGE_SIZE is | |
63 | the finest granularity at which you can page something, thus it | |
64 | controls the padding (if any) before the text segment of a ZMAGIC | |
65 | file. N_SEGSIZE is the resolution at which things can be marked as | |
66 | read-only versus read/write, so it controls the padding between the | |
67 | text segment and the data segment (in memory; on disk the padding | |
68 | between them is TARGET_PAGE_SIZE). TARGET_PAGE_SIZE and N_SEGSIZE are the same | |
69 | for most machines, but different for sun3. */ | |
70 | ||
71 | /* By default, segment size is constant. But some machines override this | |
72 | to be a function of the a.out header (e.g. machine type). */ | |
73 | ||
74 | #ifndef N_SEGSIZE | |
75 | #define N_SEGSIZE(x) SEGMENT_SIZE | |
76 | #endif | |
77 | \f | |
78 | /* Virtual memory address of the text section. | |
79 | This is getting very complicated. A good reason to discard a.out format | |
80 | for something that specifies these fields explicitly. But til then... | |
81 | ||
82 | * OMAGIC and NMAGIC files: | |
83 | (object files: text for "relocatable addr 0" right after the header) | |
84 | start at 0, offset is EXEC_BYTES_SIZE, size as stated. | |
85 | * The text address, offset, and size of ZMAGIC files depend | |
86 | on the entry point of the file: | |
87 | * entry point below TEXT_START_ADDR: | |
88 | (hack for SunOS shared libraries) | |
89 | start at 0, offset is 0, size as stated. | |
90 | * If N_HEADER_IN_TEXT(x) is true (which defaults to being the | |
91 | case when the entry point is EXEC_BYTES_SIZE or further into a page): | |
92 | no padding is needed; text can start after exec header. Sun | |
93 | considers the text segment of such files to include the exec header; | |
94 | for BFD's purposes, we don't, which makes more work for us. | |
95 | start at TEXT_START_ADDR + EXEC_BYTES_SIZE, offset is EXEC_BYTES_SIZE, | |
96 | size as stated minus EXEC_BYTES_SIZE. | |
97 | * If N_HEADER_IN_TEXT(x) is false (which defaults to being the case when | |
98 | the entry point is less than EXEC_BYTES_SIZE into a page (e.g. page | |
99 | aligned)): (padding is needed so that text can start at a page boundary) | |
100 | start at TEXT_START_ADDR, offset TARGET_PAGE_SIZE, size as stated. | |
101 | ||
102 | Specific configurations may want to hardwire N_HEADER_IN_TEXT, | |
103 | for efficiency or to allow people to play games with the entry point. | |
104 | In that case, you would #define N_HEADER_IN_TEXT(x) as 1 for sunos, | |
105 | and as 0 for most other hosts (Sony News, Vax Ultrix, etc). | |
106 | (Do this in the appropriate bfd target file.) | |
107 | (The default is a heuristic that will break if people try changing | |
108 | the entry point, perhaps with the ld -e flag.) | |
109 | ||
110 | * QMAGIC is always like a ZMAGIC for which N_HEADER_IN_TEXT is true, | |
111 | and for which the starting address is TARGET_PAGE_SIZE (or should this be | |
112 | SEGMENT_SIZE?) (TEXT_START_ADDR only applies to ZMAGIC, not to QMAGIC). | |
113 | */ | |
114 | ||
115 | /* This macro is only relevant for ZMAGIC files; QMAGIC always has the header | |
116 | in the text. */ | |
117 | #ifndef N_HEADER_IN_TEXT | |
118 | #define N_HEADER_IN_TEXT(x) (((x).a_entry & (TARGET_PAGE_SIZE-1)) >= EXEC_BYTES_SIZE) | |
119 | #endif | |
120 | ||
121 | /* Sun shared libraries, not linux. This macro is only relevant for ZMAGIC | |
122 | files. */ | |
123 | #ifndef N_SHARED_LIB | |
edac9bff ILT |
124 | #if defined (TEXT_START_ADDR) && TEXT_START_ADDR == 0 |
125 | #define N_SHARED_LIB(x) (0) | |
126 | #else | |
252b5132 RH |
127 | #define N_SHARED_LIB(x) ((x).a_entry < TEXT_START_ADDR) |
128 | #endif | |
edac9bff | 129 | #endif |
252b5132 RH |
130 | |
131 | /* Returning 0 not TEXT_START_ADDR for OMAGIC and NMAGIC is based on | |
132 | the assumption that we are dealing with a .o file, not an | |
133 | executable. This is necessary for OMAGIC (but means we don't work | |
134 | right on the output from ld -N); more questionable for NMAGIC. */ | |
135 | ||
136 | #ifndef N_TXTADDR | |
137 | #define N_TXTADDR(x) \ | |
138 | (/* The address of a QMAGIC file is always one page in, */ \ | |
139 | /* with the header in the text. */ \ | |
140 | N_IS_QMAGIC (x) ? TARGET_PAGE_SIZE + EXEC_BYTES_SIZE : \ | |
141 | N_MAGIC(x) != ZMAGIC ? 0 : /* object file or NMAGIC */\ | |
142 | N_SHARED_LIB(x) ? 0 : \ | |
143 | N_HEADER_IN_TEXT(x) ? \ | |
144 | TEXT_START_ADDR + EXEC_BYTES_SIZE : /* no padding */\ | |
145 | TEXT_START_ADDR /* a page of padding */\ | |
146 | ) | |
147 | #endif | |
148 | ||
149 | /* If N_HEADER_IN_TEXT is not true for ZMAGIC, there is some padding | |
150 | to make the text segment start at a certain boundary. For most | |
151 | systems, this boundary is TARGET_PAGE_SIZE. But for Linux, in the | |
152 | time-honored tradition of crazy ZMAGIC hacks, it is 1024 which is | |
153 | not what TARGET_PAGE_SIZE needs to be for QMAGIC. */ | |
154 | ||
155 | #ifndef ZMAGIC_DISK_BLOCK_SIZE | |
156 | #define ZMAGIC_DISK_BLOCK_SIZE TARGET_PAGE_SIZE | |
157 | #endif | |
158 | ||
159 | #define N_DISK_BLOCK_SIZE(x) \ | |
160 | (N_MAGIC(x) == ZMAGIC ? ZMAGIC_DISK_BLOCK_SIZE : TARGET_PAGE_SIZE) | |
161 | ||
162 | /* Offset in an a.out of the start of the text section. */ | |
163 | #ifndef N_TXTOFF | |
164 | #define N_TXTOFF(x) \ | |
165 | (/* For {O,N,Q}MAGIC, no padding. */ \ | |
166 | N_MAGIC(x) != ZMAGIC ? EXEC_BYTES_SIZE : \ | |
167 | N_SHARED_LIB(x) ? 0 : \ | |
168 | N_HEADER_IN_TEXT(x) ? \ | |
169 | EXEC_BYTES_SIZE : /* no padding */\ | |
170 | ZMAGIC_DISK_BLOCK_SIZE /* a page of padding */\ | |
171 | ) | |
172 | #endif | |
173 | /* Size of the text section. It's always as stated, except that we | |
174 | offset it to `undo' the adjustment to N_TXTADDR and N_TXTOFF | |
175 | for ZMAGIC files that nominally include the exec header | |
176 | as part of the first page of text. (BFD doesn't consider the | |
177 | exec header to be part of the text segment.) */ | |
178 | #ifndef N_TXTSIZE | |
179 | #define N_TXTSIZE(x) \ | |
180 | (/* For QMAGIC, we don't consider the header part of the text section. */\ | |
181 | N_IS_QMAGIC (x) ? (x).a_text - EXEC_BYTES_SIZE : \ | |
182 | (N_MAGIC(x) != ZMAGIC || N_SHARED_LIB(x)) ? (x).a_text : \ | |
183 | N_HEADER_IN_TEXT(x) ? \ | |
184 | (x).a_text - EXEC_BYTES_SIZE: /* no padding */\ | |
185 | (x).a_text /* a page of padding */\ | |
186 | ) | |
187 | #endif | |
188 | /* The address of the data segment in virtual memory. | |
189 | It is the text segment address, plus text segment size, rounded | |
190 | up to a N_SEGSIZE boundary for pure or pageable files. */ | |
191 | #ifndef N_DATADDR | |
192 | #define N_DATADDR(x) \ | |
193 | (N_MAGIC(x)==OMAGIC? (N_TXTADDR(x)+N_TXTSIZE(x)) \ | |
194 | : (N_SEGSIZE(x) + ((N_TXTADDR(x)+N_TXTSIZE(x)-1) & ~(N_SEGSIZE(x)-1)))) | |
195 | #endif | |
196 | /* The address of the BSS segment -- immediately after the data segment. */ | |
197 | ||
198 | #define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data) | |
199 | ||
200 | /* Offsets of the various portions of the file after the text segment. */ | |
201 | ||
202 | /* For {Q,Z}MAGIC, there is padding to make the data segment start on | |
203 | a page boundary. Most of the time the a_text field (and thus | |
204 | N_TXTSIZE) already contains this padding. It is possible that for | |
205 | BSDI and/or 386BSD it sometimes doesn't contain the padding, and | |
206 | perhaps we should be adding it here. But this seems kind of | |
207 | questionable and probably should be BSDI/386BSD-specific if we do | |
208 | do it. | |
209 | ||
210 | For NMAGIC (at least for hp300 BSD, probably others), there is | |
211 | padding in memory only, not on disk, so we must *not* ever pad here | |
212 | for NMAGIC. */ | |
213 | ||
214 | #ifndef N_DATOFF | |
215 | #define N_DATOFF(x) \ | |
216 | (N_TXTOFF(x) + N_TXTSIZE(x)) | |
217 | #endif | |
218 | ||
219 | #ifndef N_TRELOFF | |
220 | #define N_TRELOFF(x) ( N_DATOFF(x) + (x).a_data ) | |
221 | #endif | |
222 | #ifndef N_DRELOFF | |
223 | #define N_DRELOFF(x) ( N_TRELOFF(x) + (x).a_trsize ) | |
224 | #endif | |
225 | #ifndef N_SYMOFF | |
226 | #define N_SYMOFF(x) ( N_DRELOFF(x) + (x).a_drsize ) | |
227 | #endif | |
228 | #ifndef N_STROFF | |
229 | #define N_STROFF(x) ( N_SYMOFF(x) + (x).a_syms ) | |
230 | #endif | |
231 | \f | |
232 | /* Symbols */ | |
233 | #ifndef external_nlist | |
234 | struct external_nlist { | |
235 | bfd_byte e_strx[BYTES_IN_WORD]; /* index into string table of name */ | |
236 | bfd_byte e_type[1]; /* type of symbol */ | |
237 | bfd_byte e_other[1]; /* misc info (usually empty) */ | |
238 | bfd_byte e_desc[2]; /* description field */ | |
239 | bfd_byte e_value[BYTES_IN_WORD]; /* value of symbol */ | |
240 | }; | |
241 | #define EXTERNAL_NLIST_SIZE (BYTES_IN_WORD+4+BYTES_IN_WORD) | |
242 | #endif | |
243 | ||
244 | struct internal_nlist { | |
245 | unsigned long n_strx; /* index into string table of name */ | |
246 | unsigned char n_type; /* type of symbol */ | |
247 | unsigned char n_other; /* misc info (usually empty) */ | |
248 | unsigned short n_desc; /* description field */ | |
249 | bfd_vma n_value; /* value of symbol */ | |
250 | }; | |
251 | ||
252 | /* The n_type field is the symbol type, containing: */ | |
253 | ||
254 | #define N_UNDF 0 /* Undefined symbol */ | |
255 | #define N_ABS 2 /* Absolute symbol -- defined at particular addr */ | |
256 | #define N_TEXT 4 /* Text sym -- defined at offset in text seg */ | |
257 | #define N_DATA 6 /* Data sym -- defined at offset in data seg */ | |
258 | #define N_BSS 8 /* BSS sym -- defined at offset in zero'd seg */ | |
259 | #define N_COMM 0x12 /* Common symbol (visible after shared lib dynlink) */ | |
260 | #define N_FN 0x1f /* File name of .o file */ | |
261 | #define N_FN_SEQ 0x0C /* N_FN from Sequent compilers (sigh) */ | |
262 | /* Note: N_EXT can only be usefully OR-ed with N_UNDF, N_ABS, N_TEXT, | |
263 | N_DATA, or N_BSS. When the low-order bit of other types is set, | |
264 | (e.g. N_WARNING versus N_FN), they are two different types. */ | |
265 | #define N_EXT 1 /* External symbol (as opposed to local-to-this-file) */ | |
266 | #define N_TYPE 0x1e | |
267 | #define N_STAB 0xe0 /* If any of these bits are on, it's a debug symbol */ | |
268 | ||
269 | #define N_INDR 0x0a | |
270 | ||
271 | /* The following symbols refer to set elements. | |
272 | All the N_SET[ATDB] symbols with the same name form one set. | |
273 | Space is allocated for the set in the text section, and each set | |
274 | elements value is stored into one word of the space. | |
275 | The first word of the space is the length of the set (number of elements). | |
276 | ||
277 | The address of the set is made into an N_SETV symbol | |
278 | whose name is the same as the name of the set. | |
279 | This symbol acts like a N_DATA global symbol | |
280 | in that it can satisfy undefined external references. */ | |
281 | ||
282 | /* These appear as input to LD, in a .o file. */ | |
283 | #define N_SETA 0x14 /* Absolute set element symbol */ | |
284 | #define N_SETT 0x16 /* Text set element symbol */ | |
285 | #define N_SETD 0x18 /* Data set element symbol */ | |
286 | #define N_SETB 0x1A /* Bss set element symbol */ | |
287 | ||
288 | /* This is output from LD. */ | |
289 | #define N_SETV 0x1C /* Pointer to set vector in data area. */ | |
290 | ||
291 | /* Warning symbol. The text gives a warning message, the next symbol | |
292 | in the table will be undefined. When the symbol is referenced, the | |
293 | message is printed. */ | |
294 | ||
295 | #define N_WARNING 0x1e | |
296 | ||
297 | /* Weak symbols. These are a GNU extension to the a.out format. The | |
298 | semantics are those of ELF weak symbols. Weak symbols are always | |
299 | externally visible. The N_WEAK? values are squeezed into the | |
300 | available slots. The value of a N_WEAKU symbol is 0. The values | |
301 | of the other types are the definitions. */ | |
302 | #define N_WEAKU 0x0d /* Weak undefined symbol. */ | |
303 | #define N_WEAKA 0x0e /* Weak absolute symbol. */ | |
304 | #define N_WEAKT 0x0f /* Weak text symbol. */ | |
305 | #define N_WEAKD 0x10 /* Weak data symbol. */ | |
306 | #define N_WEAKB 0x11 /* Weak bss symbol. */ | |
307 | ||
308 | /* Relocations | |
309 | ||
310 | There are two types of relocation flavours for a.out systems, | |
311 | standard and extended. The standard form is used on systems where the | |
312 | instruction has room for all the bits of an offset to the operand, whilst | |
313 | the extended form is used when an address operand has to be split over n | |
314 | instructions. Eg, on the 68k, each move instruction can reference | |
315 | the target with a displacement of 16 or 32 bits. On the sparc, move | |
316 | instructions use an offset of 14 bits, so the offset is stored in | |
317 | the reloc field, and the data in the section is ignored. | |
318 | */ | |
319 | ||
320 | /* This structure describes a single relocation to be performed. | |
321 | The text-relocation section of the file is a vector of these structures, | |
322 | all of which apply to the text section. | |
323 | Likewise, the data-relocation section applies to the data section. */ | |
324 | ||
325 | struct reloc_std_external { | |
326 | bfd_byte r_address[BYTES_IN_WORD]; /* offset of of data to relocate */ | |
327 | bfd_byte r_index[3]; /* symbol table index of symbol */ | |
328 | bfd_byte r_type[1]; /* relocation type */ | |
329 | }; | |
330 | ||
331 | #define RELOC_STD_BITS_PCREL_BIG ((unsigned int) 0x80) | |
332 | #define RELOC_STD_BITS_PCREL_LITTLE ((unsigned int) 0x01) | |
333 | ||
334 | #define RELOC_STD_BITS_LENGTH_BIG ((unsigned int) 0x60) | |
335 | #define RELOC_STD_BITS_LENGTH_SH_BIG 5 | |
336 | #define RELOC_STD_BITS_LENGTH_LITTLE ((unsigned int) 0x06) | |
337 | #define RELOC_STD_BITS_LENGTH_SH_LITTLE 1 | |
338 | ||
339 | #define RELOC_STD_BITS_EXTERN_BIG ((unsigned int) 0x10) | |
340 | #define RELOC_STD_BITS_EXTERN_LITTLE ((unsigned int) 0x08) | |
341 | ||
342 | #define RELOC_STD_BITS_BASEREL_BIG ((unsigned int) 0x08) | |
343 | #define RELOC_STD_BITS_BASEREL_LITTLE ((unsigned int) 0x10) | |
344 | ||
345 | #define RELOC_STD_BITS_JMPTABLE_BIG ((unsigned int) 0x04) | |
346 | #define RELOC_STD_BITS_JMPTABLE_LITTLE ((unsigned int) 0x20) | |
347 | ||
348 | #define RELOC_STD_BITS_RELATIVE_BIG ((unsigned int) 0x02) | |
349 | #define RELOC_STD_BITS_RELATIVE_LITTLE ((unsigned int) 0x40) | |
350 | ||
351 | #define RELOC_STD_SIZE (BYTES_IN_WORD + 3 + 1) /* Bytes per relocation entry */ | |
352 | ||
353 | struct reloc_std_internal | |
354 | { | |
355 | bfd_vma r_address; /* Address (within segment) to be relocated. */ | |
356 | /* The meaning of r_symbolnum depends on r_extern. */ | |
357 | unsigned int r_symbolnum:24; | |
358 | /* Nonzero means value is a pc-relative offset | |
359 | and it should be relocated for changes in its own address | |
360 | as well as for changes in the symbol or section specified. */ | |
361 | unsigned int r_pcrel:1; | |
362 | /* Length (as exponent of 2) of the field to be relocated. | |
363 | Thus, a value of 2 indicates 1<<2 bytes. */ | |
364 | unsigned int r_length:2; | |
365 | /* 1 => relocate with value of symbol. | |
366 | r_symbolnum is the index of the symbol | |
367 | in files the symbol table. | |
368 | 0 => relocate with the address of a segment. | |
369 | r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS | |
370 | (the N_EXT bit may be set also, but signifies nothing). */ | |
371 | unsigned int r_extern:1; | |
372 | /* The next three bits are for SunOS shared libraries, and seem to | |
373 | be undocumented. */ | |
374 | unsigned int r_baserel:1; /* Linkage table relative */ | |
375 | unsigned int r_jmptable:1; /* pc-relative to jump table */ | |
376 | unsigned int r_relative:1; /* "relative relocation" */ | |
377 | /* unused */ | |
378 | unsigned int r_pad:1; /* Padding -- set to zero */ | |
379 | }; | |
380 | ||
381 | ||
382 | /* EXTENDED RELOCS */ | |
383 | ||
384 | struct reloc_ext_external { | |
385 | bfd_byte r_address[BYTES_IN_WORD]; /* offset of of data to relocate */ | |
386 | bfd_byte r_index[3]; /* symbol table index of symbol */ | |
387 | bfd_byte r_type[1]; /* relocation type */ | |
388 | bfd_byte r_addend[BYTES_IN_WORD]; /* datum addend */ | |
389 | }; | |
390 | ||
1ce6d55a | 391 | #ifndef RELOC_EXT_BITS_EXTERN_BIG |
252b5132 | 392 | #define RELOC_EXT_BITS_EXTERN_BIG ((unsigned int) 0x80) |
1ce6d55a HPN |
393 | #endif |
394 | ||
395 | #ifndef RELOC_EXT_BITS_EXTERN_LITTLE | |
252b5132 | 396 | #define RELOC_EXT_BITS_EXTERN_LITTLE ((unsigned int) 0x01) |
1ce6d55a | 397 | #endif |
252b5132 | 398 | |
1ce6d55a | 399 | #ifndef RELOC_EXT_BITS_TYPE_BIG |
252b5132 | 400 | #define RELOC_EXT_BITS_TYPE_BIG ((unsigned int) 0x1F) |
1ce6d55a HPN |
401 | #endif |
402 | ||
403 | #ifndef RELOC_EXT_BITS_TYPE_SH_BIG | |
252b5132 | 404 | #define RELOC_EXT_BITS_TYPE_SH_BIG 0 |
1ce6d55a HPN |
405 | #endif |
406 | ||
407 | #ifndef RELOC_EXT_BITS_TYPE_LITTLE | |
252b5132 | 408 | #define RELOC_EXT_BITS_TYPE_LITTLE ((unsigned int) 0xF8) |
1ce6d55a HPN |
409 | #endif |
410 | ||
411 | #ifndef RELOC_EXT_BITS_TYPE_SH_LITTLE | |
252b5132 | 412 | #define RELOC_EXT_BITS_TYPE_SH_LITTLE 3 |
1ce6d55a | 413 | #endif |
252b5132 RH |
414 | |
415 | /* Bytes per relocation entry */ | |
416 | #define RELOC_EXT_SIZE (BYTES_IN_WORD + 3 + 1 + BYTES_IN_WORD) | |
417 | ||
418 | enum reloc_type | |
419 | { | |
420 | /* simple relocations */ | |
421 | RELOC_8, /* data[0:7] = addend + sv */ | |
422 | RELOC_16, /* data[0:15] = addend + sv */ | |
423 | RELOC_32, /* data[0:31] = addend + sv */ | |
424 | /* pc-rel displacement */ | |
425 | RELOC_DISP8, /* data[0:7] = addend - pc + sv */ | |
426 | RELOC_DISP16, /* data[0:15] = addend - pc + sv */ | |
427 | RELOC_DISP32, /* data[0:31] = addend - pc + sv */ | |
428 | /* Special */ | |
429 | RELOC_WDISP30, /* data[0:29] = (addend + sv - pc)>>2 */ | |
430 | RELOC_WDISP22, /* data[0:21] = (addend + sv - pc)>>2 */ | |
431 | RELOC_HI22, /* data[0:21] = (addend + sv)>>10 */ | |
432 | RELOC_22, /* data[0:21] = (addend + sv) */ | |
433 | RELOC_13, /* data[0:12] = (addend + sv) */ | |
434 | RELOC_LO10, /* data[0:9] = (addend + sv) */ | |
435 | RELOC_SFA_BASE, | |
436 | RELOC_SFA_OFF13, | |
437 | /* P.I.C. (base-relative) */ | |
438 | RELOC_BASE10, /* Not sure - maybe we can do this the */ | |
439 | RELOC_BASE13, /* right way now */ | |
440 | RELOC_BASE22, | |
441 | /* for some sort of pc-rel P.I.C. (?) */ | |
442 | RELOC_PC10, | |
443 | RELOC_PC22, | |
444 | /* P.I.C. jump table */ | |
445 | RELOC_JMP_TBL, | |
446 | /* reputedly for shared libraries somehow */ | |
447 | RELOC_SEGOFF16, | |
448 | RELOC_GLOB_DAT, | |
449 | RELOC_JMP_SLOT, | |
450 | RELOC_RELATIVE, | |
451 | ||
452 | RELOC_11, | |
453 | RELOC_WDISP2_14, | |
454 | RELOC_WDISP19, | |
455 | RELOC_HHI22, /* data[0:21] = (addend + sv) >> 42 */ | |
456 | RELOC_HLO10, /* data[0:9] = (addend + sv) >> 32 */ | |
457 | ||
458 | /* 29K relocation types */ | |
459 | RELOC_JUMPTARG, | |
460 | RELOC_CONST, | |
461 | RELOC_CONSTH, | |
462 | ||
463 | /* All the new ones I can think of, for sparc v9 */ | |
464 | ||
465 | RELOC_64, /* data[0:63] = addend + sv */ | |
466 | RELOC_DISP64, /* data[0:63] = addend - pc + sv */ | |
467 | RELOC_WDISP21, /* data[0:20] = (addend + sv - pc)>>2 */ | |
468 | RELOC_DISP21, /* data[0:20] = addend - pc + sv */ | |
469 | RELOC_DISP14, /* data[0:13] = addend - pc + sv */ | |
470 | /* Q . | |
471 | What are the other ones, | |
472 | Since this is a clean slate, can we throw away the ones we dont | |
473 | understand ? Should we sort the values ? What about using a | |
474 | microcode format like the 68k ? | |
475 | */ | |
476 | NO_RELOC | |
477 | }; | |
478 | ||
479 | ||
480 | struct reloc_internal { | |
481 | bfd_vma r_address; /* offset of of data to relocate */ | |
482 | long r_index; /* symbol table index of symbol */ | |
483 | enum reloc_type r_type; /* relocation type */ | |
484 | bfd_vma r_addend; /* datum addend */ | |
485 | }; | |
486 | ||
487 | /* Q. | |
488 | Should the length of the string table be 4 bytes or 8 bytes ? | |
489 | ||
490 | Q. | |
491 | What about archive indexes ? | |
492 | ||
493 | */ | |
494 | ||
495 | #endif /* __A_OUT_64_H__ */ |