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7029 want per-process exploit mitigation features (secflags)
7030 want basic address space layout randomization (aslr)
7031 noexec_user_stack should be a secflag
7032 want a means to forbid mappings around NULL.
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--- old/usr/src/cmd/sgs/elfdump/common/struct_layout.h
+++ new/usr/src/cmd/sgs/elfdump/common/struct_layout.h
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License (the "License").
6 6 * You may not use this file except in compliance with the License.
7 7 *
8 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 9 * or http://www.opensolaris.org/os/licensing.
10 10 * See the License for the specific language governing permissions
11 11 * and limitations under the License.
12 12 *
13 13 * When distributing Covered Code, include this CDDL HEADER in each
14 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 15 * If applicable, add the following below this CDDL HEADER, with the
16 16 * fields enclosed by brackets "[]" replaced with your own identifying
17 17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 18 *
19 19 * CDDL HEADER END
20 20 */
21 21
22 22 /*
23 23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
24 24 * Use is subject to license terms.
25 25 */
26 26
27 27 /*
28 28 * Copyright 2012 DEY Storage Systems, Inc. All rights reserved.
29 29 */
30 30
31 31 #ifndef _STRUCT_LAYOUT_H
32 32 #define _STRUCT_LAYOUT_H
33 33
34 34 #include <conv.h>
35 35 #include <_machelf.h>
36 36
37 37 /*
38 38 * Local include file for elfdump, used to define structure layout
39 39 * definitions for various system structs.
40 40 */
41 41
42 42 #ifdef __cplusplus
43 43 extern "C" {
44 44 #endif
45 45
46 46
47 47 /*
48 48 * Solaris defines system structs that elfdump needs to display
49 49 * data from. We have a variety of hurdles to overcome in doing this:
50 50 *
51 51 * - The size of system types can differ between ELFCLASS32 and
52 52 * ELFCLASS64.
53 53 * - Stucture layout can differ between architectures, so a given
54 54 * field can have a different struct offset than is native
55 55 * for the system running elfdump. Depending on the struct
56 56 * in question, the layout for one platform may be impossible
57 57 * to achieve on another.
58 58 * - The byte order of the core object can differ from that
59 59 * of the system running elfdump.
60 60 *
61 61 * The result is that in the fully general case, each architecture
62 62 * can have a slightly different definition of these structures.
63 63 * The usual approach of assigning a pointer of the desired structure
64 64 * type and then accessing fields through that pointer cannot be used
65 65 * here. That approach can only be used to access structures with the
66 66 * native layout of the elfdump host. We want any instance of elfdump
67 67 * to be able to examine a Solaris object for any supported architecture,
68 68 * so we need a more flexible approach.
69 69 *
70 70 * The solution to this problem lies in the fact that the binary
71 71 * layout of these public types cannot be changed, except in backward
72 72 * compatible ways. They are written to core files or published in
73 73 * other ways such that we can't make changes that would make it
74 74 * impossible to analyze old files. This means that we can build
75 75 * table of offsets and sizes for each field of each struct, on
76 76 * a per-archecture basis. These tables can be used to access the
77 77 * struct fields directly from the note desc data, and elfdump
78 78 * on any host can read the data from any other host.
79 79 *
80 80 * When reading these tables, it can be very helpful to examine
81 81 * the struct definition at the same time.
82 82 */
83 83
84 84 /*
85 85 * sl_field_t is used to describe a struct field
86 86 */
87 87 typedef struct {
88 88 ushort_t slf_offset; /* Offset from start of struct */
89 89 ushort_t slf_eltlen; /* Size of datum, in bytes */
90 90 ushort_t slf_nelts; /* 0 for scalar, # of els for array */
91 91 uchar_t slf_sign; /* True (1) if signed quantity */
92 92 } sl_field_t;
93 93
94 94 /*
95 95 * This type is used to extract and manipulate data described by
96 96 * sl_field_t. We rely on the C guarantee that all the fields in
97 97 * a union have offset 0.
98 98 */
99 99 typedef union {
100 100 char sld_i8;
101 101 uchar_t sld_ui8;
102 102 short sld_i16;
103 103 ushort_t sld_ui16;
104 104 int32_t sld_i32;
105 105 uint32_t sld_ui32;
106 106 int64_t sld_i64;
107 107 uint64_t sld_ui64;
108 108 } sl_data_t;
109 109
110 110 /*
111 111 * Buffer large enough to format any integral value in a field
112 112 */
113 113 typedef char sl_fmtbuf_t[CONV_INV_BUFSIZE * 2];
114 114
115 115 /*
116 116 * Types of formatting done by fmt_num()
117 117 */
118 118 typedef enum {
119 119 SL_FMT_NUM_DEC = 0, /* Decimal integer */
120 120 SL_FMT_NUM_HEX = 1, /* Hex integer, with natural width */
121 121 SL_FMT_NUM_ZHEX = 2, /* Hex integer, fixed width with zero fill */
122 122 } sl_fmt_num_t;
123 123
124 124
125 125
126 126
127 127 /*
128 128 * Layout description of auxv_t, from <sys/auxv.h>.
129 129 */
130 130 typedef struct {
131 131 sl_field_t sizeof_struct;
132 132 sl_field_t a_type;
133 133 sl_field_t a_val;
134 134 sl_field_t a_ptr;
135 135 sl_field_t a_fcn;
136 136 } sl_auxv_layout_t;
137 137
138 138 /*
139 139 * Layout description of prgregset_t, an architecture specific
140 140 * array of general register c values
141 141 */
142 142 typedef struct {
143 143 sl_field_t sizeof_struct;
144 144 sl_field_t elt0;
145 145 } sl_prgregset_layout_t;
146 146
147 147 /*
148 148 * Layout description of lwpstatus_t, from <sys/procfs.h>.
149 149 */
150 150 typedef struct {
151 151 sl_field_t sizeof_struct;
152 152 sl_field_t pr_flags;
153 153 sl_field_t pr_lwpid;
154 154 sl_field_t pr_why;
155 155 sl_field_t pr_what;
156 156 sl_field_t pr_cursig;
157 157 sl_field_t pr_info;
158 158 sl_field_t pr_lwppend;
159 159 sl_field_t pr_lwphold;
160 160 sl_field_t pr_action;
161 161 sl_field_t pr_altstack;
162 162 sl_field_t pr_oldcontext;
163 163 sl_field_t pr_syscall;
164 164 sl_field_t pr_nsysarg;
165 165 sl_field_t pr_errno;
166 166 sl_field_t pr_sysarg;
167 167 sl_field_t pr_rval1;
168 168 sl_field_t pr_rval2;
169 169 sl_field_t pr_clname;
170 170 sl_field_t pr_tstamp;
171 171 sl_field_t pr_utime;
172 172 sl_field_t pr_stime;
173 173 sl_field_t pr_errpriv;
174 174 sl_field_t pr_ustack;
175 175 sl_field_t pr_instr;
176 176 sl_field_t pr_reg;
177 177 sl_field_t pr_fpreg;
178 178 } sl_lwpstatus_layout_t;
179 179
180 180 /*
181 181 * Layout description of pstatus_t, from <sys/procfs.h>.
182 182 */
183 183 typedef struct {
184 184 sl_field_t sizeof_struct;
185 185 sl_field_t pr_flags;
186 186 sl_field_t pr_nlwp;
187 187 sl_field_t pr_pid;
188 188 sl_field_t pr_ppid;
189 189 sl_field_t pr_pgid;
190 190 sl_field_t pr_sid;
191 191 sl_field_t pr_aslwpid;
192 192 sl_field_t pr_agentid;
193 193 sl_field_t pr_sigpend;
194 194 sl_field_t pr_brkbase;
195 195 sl_field_t pr_brksize;
196 196 sl_field_t pr_stkbase;
197 197 sl_field_t pr_stksize;
198 198 sl_field_t pr_utime;
199 199 sl_field_t pr_stime;
200 200 sl_field_t pr_cutime;
201 201 sl_field_t pr_cstime;
202 202 sl_field_t pr_sigtrace;
203 203 sl_field_t pr_flttrace;
204 204 sl_field_t pr_sysentry;
205 205 sl_field_t pr_sysexit;
206 206 sl_field_t pr_dmodel;
207 207 sl_field_t pr_taskid;
208 208 sl_field_t pr_projid;
209 209 sl_field_t pr_nzomb;
210 210 sl_field_t pr_zoneid;
211 211 sl_field_t pr_lwp;
212 212 } sl_pstatus_layout_t;
213 213
214 214 /*
215 215 * Layout description of prstatus_t, from <sys/old_procfs.h>.
216 216 */
217 217 typedef struct {
218 218 sl_field_t sizeof_struct;
219 219 sl_field_t pr_flags;
220 220 sl_field_t pr_why;
221 221 sl_field_t pr_what;
222 222 sl_field_t pr_info;
223 223 sl_field_t pr_cursig;
224 224 sl_field_t pr_nlwp;
225 225 sl_field_t pr_sigpend;
226 226 sl_field_t pr_sighold;
227 227 sl_field_t pr_altstack;
228 228 sl_field_t pr_action;
229 229 sl_field_t pr_pid;
230 230 sl_field_t pr_ppid;
231 231 sl_field_t pr_pgrp;
232 232 sl_field_t pr_sid;
233 233 sl_field_t pr_utime;
234 234 sl_field_t pr_stime;
235 235 sl_field_t pr_cutime;
236 236 sl_field_t pr_cstime;
237 237 sl_field_t pr_clname;
238 238 sl_field_t pr_syscall;
239 239 sl_field_t pr_nsysarg;
240 240 sl_field_t pr_sysarg;
241 241 sl_field_t pr_who;
242 242 sl_field_t pr_lwppend;
243 243 sl_field_t pr_oldcontext;
244 244 sl_field_t pr_brkbase;
245 245 sl_field_t pr_brksize;
246 246 sl_field_t pr_stkbase;
247 247 sl_field_t pr_stksize;
248 248 sl_field_t pr_processor;
249 249 sl_field_t pr_bind;
250 250 sl_field_t pr_instr;
251 251 sl_field_t pr_reg;
252 252 } sl_prstatus_layout_t;
253 253
254 254 /*
255 255 * Layout description of psinfo_t, from <sys/procfs.h>.
256 256 */
257 257 typedef struct {
258 258 sl_field_t sizeof_struct;
259 259 sl_field_t pr_flag;
260 260 sl_field_t pr_nlwp;
261 261 sl_field_t pr_pid;
262 262 sl_field_t pr_ppid;
263 263 sl_field_t pr_pgid;
264 264 sl_field_t pr_sid;
265 265 sl_field_t pr_uid;
266 266 sl_field_t pr_euid;
267 267 sl_field_t pr_gid;
268 268 sl_field_t pr_egid;
269 269 sl_field_t pr_addr;
270 270 sl_field_t pr_size;
271 271 sl_field_t pr_rssize;
272 272 sl_field_t pr_ttydev;
273 273 sl_field_t pr_pctcpu;
274 274 sl_field_t pr_pctmem;
275 275 sl_field_t pr_start;
276 276 sl_field_t pr_time;
277 277 sl_field_t pr_ctime;
278 278 sl_field_t pr_fname;
279 279 sl_field_t pr_psargs;
280 280 sl_field_t pr_wstat;
281 281 sl_field_t pr_argc;
282 282 sl_field_t pr_argv;
283 283 sl_field_t pr_envp;
284 284 sl_field_t pr_dmodel;
285 285 sl_field_t pr_taskid;
286 286 sl_field_t pr_projid;
287 287 sl_field_t pr_nzomb;
288 288 sl_field_t pr_poolid;
289 289 sl_field_t pr_zoneid;
290 290 sl_field_t pr_contract;
291 291 sl_field_t pr_lwp;
292 292 } sl_psinfo_layout_t;
293 293
294 294 /*
295 295 * Layout description of prpsinfo_t, from <sys/old_procfs.h>.
296 296 */
297 297 typedef struct {
298 298 sl_field_t sizeof_struct;
299 299 sl_field_t pr_state;
300 300 sl_field_t pr_sname;
301 301 sl_field_t pr_zomb;
302 302 sl_field_t pr_nice;
303 303 sl_field_t pr_flag;
304 304 sl_field_t pr_uid;
305 305 sl_field_t pr_gid;
306 306 sl_field_t pr_pid;
307 307 sl_field_t pr_ppid;
308 308 sl_field_t pr_pgrp;
309 309 sl_field_t pr_sid;
310 310 sl_field_t pr_addr;
311 311 sl_field_t pr_size;
312 312 sl_field_t pr_rssize;
313 313 sl_field_t pr_wchan;
314 314 sl_field_t pr_start;
315 315 sl_field_t pr_time;
316 316 sl_field_t pr_pri;
317 317 sl_field_t pr_oldpri;
318 318 sl_field_t pr_cpu;
319 319 sl_field_t pr_ottydev;
320 320 sl_field_t pr_lttydev;
321 321 sl_field_t pr_clname;
322 322 sl_field_t pr_fname;
323 323 sl_field_t pr_psargs;
324 324 sl_field_t pr_syscall;
325 325 sl_field_t pr_ctime;
326 326 sl_field_t pr_bysize;
327 327 sl_field_t pr_byrssize;
328 328 sl_field_t pr_argc;
329 329 sl_field_t pr_argv;
330 330 sl_field_t pr_envp;
331 331 sl_field_t pr_wstat;
332 332 sl_field_t pr_pctcpu;
333 333 sl_field_t pr_pctmem;
334 334 sl_field_t pr_euid;
335 335 sl_field_t pr_egid;
336 336 sl_field_t pr_aslwpid;
337 337 sl_field_t pr_dmodel;
338 338 } sl_prpsinfo_layout_t;
339 339
340 340 /*
341 341 * Layout description of lwpsinfo_t, from <sys/procfs.h>.
342 342 */
343 343 typedef struct {
344 344 sl_field_t sizeof_struct;
345 345 sl_field_t pr_flag;
346 346 sl_field_t pr_lwpid;
347 347 sl_field_t pr_addr;
348 348 sl_field_t pr_wchan;
349 349 sl_field_t pr_stype;
350 350 sl_field_t pr_state;
351 351 sl_field_t pr_sname;
352 352 sl_field_t pr_nice;
353 353 sl_field_t pr_syscall;
354 354 sl_field_t pr_oldpri;
355 355 sl_field_t pr_cpu;
356 356 sl_field_t pr_pri;
357 357 sl_field_t pr_pctcpu;
358 358 sl_field_t pr_start;
359 359 sl_field_t pr_time;
360 360 sl_field_t pr_clname;
361 361 sl_field_t pr_name;
362 362 sl_field_t pr_onpro;
363 363 sl_field_t pr_bindpro;
364 364 sl_field_t pr_bindpset;
365 365 sl_field_t pr_lgrp;
366 366 } sl_lwpsinfo_layout_t;
367 367
368 368 /*
369 369 * Layout description of prcred_t, from <sys/procfs.h>.
370 370 */
371 371 typedef struct {
372 372 sl_field_t sizeof_struct;
373 373 sl_field_t pr_euid;
374 374 sl_field_t pr_ruid;
375 375 sl_field_t pr_suid;
376 376 sl_field_t pr_egid;
377 377 sl_field_t pr_rgid;
378 378 sl_field_t pr_sgid;
379 379 sl_field_t pr_ngroups;
380 380 sl_field_t pr_groups;
381 381 } sl_prcred_layout_t;
382 382
383 383 /*
384 384 * Layout description of prpriv_t, from <sys/procfs.h>.
385 385 */
386 386 typedef struct {
387 387 sl_field_t sizeof_struct;
388 388 sl_field_t pr_nsets;
389 389 sl_field_t pr_setsize;
390 390 sl_field_t pr_infosize;
391 391 sl_field_t pr_sets;
392 392 } sl_prpriv_layout_t;
393 393
394 394 /*
395 395 * Layout description of priv_impl_info_t, from <sys/priv.h>.
396 396 */
397 397 typedef struct {
398 398 sl_field_t sizeof_struct;
399 399 sl_field_t priv_headersize;
400 400 sl_field_t priv_flags;
401 401 sl_field_t priv_nsets;
402 402 sl_field_t priv_setsize;
403 403 sl_field_t priv_max;
404 404 sl_field_t priv_infosize;
405 405 sl_field_t priv_globalinfosize;
406 406 } sl_priv_impl_info_layout_t;
407 407
408 408 /*
409 409 * Layout description of fltset_t, from <sys/fault.h>.
410 410 */
411 411 typedef struct {
412 412 sl_field_t sizeof_struct;
413 413 sl_field_t word;
414 414 } sl_fltset_layout_t;
415 415
416 416 /*
417 417 * Layout description of siginfo_t, from <sys/siginfo.h>.
418 418 *
419 419 * siginfo_t is unusual, in that it contains a large union
420 420 * full of private fields. There are macros defined to give
421 421 * access to these fields via the names documented in the
422 422 * siginfo manpage. We stick to the documented names
423 423 * rather than try to unravel the undocumented blob. Hence,
424 424 * the layout description below is a "logical" view of siginfo_t.
425 425 * The fields below are not necessarily in the same order as
426 426 * they appear in siginfo_t, nor are they everything that is in
427 427 * that struct. They may also overlap each other, if they are
428 428 * contained within of the union.
429 429 *
430 430 * The f_ prefixes are used to prevent our field names from
431 431 * clashing with the macros defined in siginfo.h.
432 432 */
433 433 typedef struct {
434 434 sl_field_t sizeof_struct;
435 435 sl_field_t f_si_signo;
436 436 sl_field_t f_si_errno;
437 437 sl_field_t f_si_code;
438 438 sl_field_t f_si_value_int;
439 439 sl_field_t f_si_value_ptr;
440 440 sl_field_t f_si_pid;
441 441 sl_field_t f_si_uid;
442 442 sl_field_t f_si_ctid;
443 443 sl_field_t f_si_zoneid;
444 444 sl_field_t f_si_entity;
445 445 sl_field_t f_si_addr;
446 446 sl_field_t f_si_status;
447 447 sl_field_t f_si_band;
448 448 } sl_siginfo_layout_t;
449 449
450 450 /*
451 451 * Layout description of sigset_t, from <sys/signal.h>.
452 452 */
453 453 typedef struct {
454 454 sl_field_t sizeof_struct;
455 455 sl_field_t sigbits;
456 456 } sl_sigset_layout_t;
457 457
458 458 /*
459 459 * Layout description of struct sigaction, from <sys/signal.h>.
460 460 */
461 461 typedef struct {
462 462 sl_field_t sizeof_struct;
463 463 sl_field_t sa_flags;
464 464 sl_field_t sa_hand;
465 465 sl_field_t sa_sigact;
466 466 sl_field_t sa_mask;
467 467 } sl_sigaction_layout_t;
468 468
469 469 /*
470 470 * Layout description of stack_t, from <sys/signal.h>.
471 471 */
472 472 typedef struct {
473 473 sl_field_t sizeof_struct;
474 474 sl_field_t ss_sp;
475 475 sl_field_t ss_size;
476 476 sl_field_t ss_flags;
477 477 } sl_stack_layout_t;
478 478
479 479 /*
480 480 * Layout description of sysset_t, from <sys/syscall.h>.
481 481 */
482 482 typedef struct {
483 483 sl_field_t sizeof_struct;
484 484 sl_field_t word;
485 485 } sl_sysset_layout_t;
486 486
487 487 /*
488 488 * Layout description of timestruc_t, from <sys/time_impl.h>.
489 489 */
490 490 typedef struct {
491 491 sl_field_t sizeof_struct;
492 492 sl_field_t tv_sec;
493 493 sl_field_t tv_nsec;
494 494 } sl_timestruc_layout_t;
495 495
496 496 /*
497 497 * Layout description of struct utsname, from <sys/utsname.h>.
498 498 */
499 499 typedef struct {
500 500 sl_field_t sizeof_struct;
501 501 sl_field_t sysname;
502 502 sl_field_t nodename;
503 503 sl_field_t release;
504 504 sl_field_t version;
505 505 sl_field_t machine;
506 506 } sl_utsname_layout_t;
507 507
508 508 /*
509 509 * Layout description of prdinfo_t, from <sys/procfs.h>.
510 510 */
511 511 typedef struct {
512 512 sl_field_t sizeof_struct;
513 513 sl_field_t pr_fd;
514 514 sl_field_t pr_mode;
515 515 sl_field_t pr_uid;
516 516 sl_field_t pr_gid;
517 517 sl_field_t pr_major;
518 518 sl_field_t pr_minor;
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519 519 sl_field_t pr_rmajor;
520 520 sl_field_t pr_rminor;
521 521 sl_field_t pr_ino;
522 522 sl_field_t pr_offset;
523 523 sl_field_t pr_size;
524 524 sl_field_t pr_fileflags;
525 525 sl_field_t pr_fdflags;
526 526 sl_field_t pr_path;
527 527 } sl_prfdinfo_layout_t;
528 528
529 +typedef struct {
530 + sl_field_t sizeof_struct;
531 + sl_field_t pr_version;
532 + sl_field_t pr_effective;
533 + sl_field_t pr_inherit;
534 + sl_field_t pr_lower;
535 + sl_field_t pr_upper;
536 +} sl_prsecflags_layout_t;
537 +
529 538 /*
530 539 * This type collects all of the layout definitions for
531 540 * a given architecture.
532 541 */
533 542 typedef struct {
534 543 const sl_auxv_layout_t *auxv; /* auxv_t */
535 544 const sl_fltset_layout_t *fltset; /* fltset_t */
536 545 const sl_lwpsinfo_layout_t *lwpsinfo; /* lwpsinfo_t */
537 546 const sl_lwpstatus_layout_t *lwpstatus; /* lwpstatus_t */
538 547 const sl_prcred_layout_t *prcred; /* prcred_t */
539 548 const sl_priv_impl_info_layout_t *priv_impl_info; /* priv_impl_info_t */
540 549 const sl_prpriv_layout_t *prpriv; /* prpriv_t */
541 550 const sl_psinfo_layout_t *psinfo; /* psinfo_t */
542 551 const sl_pstatus_layout_t *pstatus; /* pstatus_t */
543 552 const sl_prgregset_layout_t *prgregset; /* prgregset_t */
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544 553 const sl_prpsinfo_layout_t *prpsinfo; /* prpsinfo_t */
545 554 const sl_prstatus_layout_t *prstatus; /* prstatus_t */
546 555 const sl_sigaction_layout_t *sigaction; /* struct sigaction */
547 556 const sl_siginfo_layout_t *siginfo; /* siginfo_t */
548 557 const sl_sigset_layout_t *sigset; /* sigset_t */
549 558 const sl_stack_layout_t *stack; /* stack_t */
550 559 const sl_sysset_layout_t *sysset; /* sysset_t */
551 560 const sl_timestruc_layout_t *timestruc; /* timestruc_t */
552 561 const sl_utsname_layout_t *utsname; /* struct utsname */
553 562 const sl_prfdinfo_layout_t *prfdinfo; /* prdinfo_t */
563 + const sl_prsecflags_layout_t *prsecflags; /* prsecflags_t */
554 564 } sl_arch_layout_t;
555 565
556 566
557 567
558 568 extern void sl_extract_num_field(const char *data, int do_swap,
559 569 const sl_field_t *fdesc, sl_data_t *field_data);
560 570 extern Word sl_extract_as_word(const char *data, int do_swap,
561 571 const sl_field_t *fdesc);
562 572 extern Lword sl_extract_as_lword(const char *data, int do_swap,
563 573 const sl_field_t *fdesc);
564 574 extern Sword sl_extract_as_sword(const char *data, int do_swap,
565 575 const sl_field_t *fdesc);
566 576 extern const char *sl_fmt_num(const char *data, int do_swap,
567 577 const sl_field_t *fdesc, sl_fmt_num_t fmt_type,
568 578 sl_fmtbuf_t buf);
569 579
570 580
571 581 extern const sl_arch_layout_t *sl_mach(Half);
572 582 extern const sl_arch_layout_t *struct_layout_i386(void);
573 583 extern const sl_arch_layout_t *struct_layout_amd64(void);
574 584 extern const sl_arch_layout_t *struct_layout_sparc(void);
575 585 extern const sl_arch_layout_t *struct_layout_sparcv9(void);
576 586
577 587
578 588
579 589 #ifdef __cplusplus
580 590 }
581 591 #endif
582 592
583 593 #endif /* _STRUCT_LAYOUT_H */
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