1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 1994-1996 Søren Schmidt
5 * Copyright (c) 2018 Turing Robotic Industries Inc.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/cdefs.h>
35 #include <sys/elf.h>
36 #include <sys/exec.h>
37 #include <sys/imgact.h>
38 #include <sys/imgact_elf.h>
39 #include <sys/kernel.h>
40 #include <sys/lock.h>
41 #include <sys/module.h>
42 #include <sys/mutex.h>
43 #include <sys/proc.h>
44 #include <sys/signalvar.h>
45 #include <sys/sysctl.h>
46 #include <sys/sysent.h>
47
48 #include <vm/vm.h>
49 #include <vm/pmap.h>
50 #include <vm/vm_param.h>
51 #include <vm/vm_map.h>
52
53 #include <arm64/linux/linux.h>
54 #include <arm64/linux/linux_proto.h>
55 #include <compat/linux/linux_dtrace.h>
56 #include <compat/linux/linux_emul.h>
57 #include <compat/linux/linux_ioctl.h>
58 #include <compat/linux/linux_mib.h>
59 #include <compat/linux/linux_misc.h>
60 #include <compat/linux/linux_util.h>
61 #include <compat/linux/linux_vdso.h>
62
63 #include <machine/md_var.h>
64
65 #ifdef VFP
66 #include <machine/vfp.h>
67 #endif
68
69 MODULE_VERSION(linux64elf, 1);
70
71 const char *linux_kplatform;
72 static int linux_szsigcode;
73 static vm_object_t linux_shared_page_obj;
74 static char *linux_shared_page_mapping;
75 extern char _binary_linux_locore_o_start;
76 extern char _binary_linux_locore_o_end;
77
78 extern struct sysent linux_sysent[LINUX_SYS_MAXSYSCALL];
79
80 SET_DECLARE(linux_ioctl_handler_set, struct linux_ioctl_handler);
81
82 static int linux_copyout_strings(struct image_params *imgp,
83 uintptr_t *stack_base);
84 static int linux_elf_fixup(uintptr_t *stack_base,
85 struct image_params *iparams);
86 static bool linux_trans_osrel(const Elf_Note *note, int32_t *osrel);
87 static void linux_vdso_install(const void *param);
88 static void linux_vdso_deinstall(const void *param);
89 static void linux_set_syscall_retval(struct thread *td, int error);
90 static int linux_fetch_syscall_args(struct thread *td);
91 static void linux_exec_setregs(struct thread *td, struct image_params *imgp,
92 uintptr_t stack);
93
94 /* DTrace init */
95 LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE);
96
97 /* DTrace probes */
98 LIN_SDT_PROBE_DEFINE2(sysvec, linux_translate_traps, todo, "int", "int");
99 LIN_SDT_PROBE_DEFINE0(sysvec, linux_exec_setregs, todo);
100 LIN_SDT_PROBE_DEFINE0(sysvec, linux_copyout_auxargs, todo);
101 LIN_SDT_PROBE_DEFINE0(sysvec, linux_elf_fixup, todo);
102 LIN_SDT_PROBE_DEFINE0(sysvec, linux_rt_sigreturn, todo);
103 LIN_SDT_PROBE_DEFINE0(sysvec, linux_rt_sendsig, todo);
104 LIN_SDT_PROBE_DEFINE0(sysvec, linux_vdso_install, todo);
105 LIN_SDT_PROBE_DEFINE0(sysvec, linux_vdso_deinstall, todo);
106
107 /* LINUXTODO: do we have traps to translate? */
108 static int
linux_translate_traps(int signal,int trap_code)109 linux_translate_traps(int signal, int trap_code)
110 {
111
112 LIN_SDT_PROBE2(sysvec, linux_translate_traps, todo, signal, trap_code);
113 return (signal);
114 }
115
116 LINUX_VDSO_SYM_CHAR(linux_platform);
117
118 static int
linux_fetch_syscall_args(struct thread * td)119 linux_fetch_syscall_args(struct thread *td)
120 {
121 struct proc *p;
122 struct syscall_args *sa;
123 register_t *ap;
124
125 p = td->td_proc;
126 ap = td->td_frame->tf_x;
127 sa = &td->td_sa;
128
129 sa->code = td->td_frame->tf_x[8];
130 /* LINUXTODO: generic syscall? */
131 if (sa->code >= p->p_sysent->sv_size)
132 sa->callp = &p->p_sysent->sv_table[0];
133 else
134 sa->callp = &p->p_sysent->sv_table[sa->code];
135
136 if (sa->callp->sy_narg > MAXARGS)
137 panic("ARM64TODO: Could we have more than %d args?", MAXARGS);
138 memcpy(sa->args, ap, MAXARGS * sizeof(register_t));
139
140 td->td_retval[0] = 0;
141 return (0);
142 }
143
144 static void
linux_set_syscall_retval(struct thread * td,int error)145 linux_set_syscall_retval(struct thread *td, int error)
146 {
147
148 td->td_retval[1] = td->td_frame->tf_x[1];
149 cpu_set_syscall_retval(td, error);
150
151 if (__predict_false(error != 0)) {
152 if (error != ERESTART && error != EJUSTRETURN)
153 td->td_frame->tf_x[0] = bsd_to_linux_errno(error);
154 }
155 }
156
157 static int
linux_copyout_auxargs(struct image_params * imgp,uintptr_t base)158 linux_copyout_auxargs(struct image_params *imgp, uintptr_t base)
159 {
160 Elf_Auxargs *args;
161 Elf_Auxinfo *argarray, *pos;
162 struct proc *p;
163 int error, issetugid;
164
165 LIN_SDT_PROBE0(sysvec, linux_copyout_auxargs, todo);
166 p = imgp->proc;
167
168 args = (Elf64_Auxargs *)imgp->auxargs;
169 argarray = pos = malloc(LINUX_AT_COUNT * sizeof(*pos), M_TEMP,
170 M_WAITOK | M_ZERO);
171
172 issetugid = p->p_flag & P_SUGID ? 1 : 0;
173 AUXARGS_ENTRY(pos, LINUX_AT_SYSINFO_EHDR,
174 imgp->proc->p_sysent->sv_shared_page_base);
175 AUXARGS_ENTRY(pos, LINUX_AT_HWCAP, *imgp->sysent->sv_hwcap);
176 AUXARGS_ENTRY(pos, AT_PAGESZ, args->pagesz);
177 AUXARGS_ENTRY(pos, LINUX_AT_CLKTCK, stclohz);
178 AUXARGS_ENTRY(pos, AT_PHDR, args->phdr);
179 AUXARGS_ENTRY(pos, AT_PHENT, args->phent);
180 AUXARGS_ENTRY(pos, AT_PHNUM, args->phnum);
181 AUXARGS_ENTRY(pos, AT_BASE, args->base);
182 AUXARGS_ENTRY(pos, AT_FLAGS, args->flags);
183 AUXARGS_ENTRY(pos, AT_ENTRY, args->entry);
184 AUXARGS_ENTRY(pos, AT_UID, imgp->proc->p_ucred->cr_ruid);
185 AUXARGS_ENTRY(pos, AT_EUID, imgp->proc->p_ucred->cr_svuid);
186 AUXARGS_ENTRY(pos, AT_GID, imgp->proc->p_ucred->cr_rgid);
187 AUXARGS_ENTRY(pos, AT_EGID, imgp->proc->p_ucred->cr_svgid);
188 AUXARGS_ENTRY(pos, LINUX_AT_SECURE, issetugid);
189 AUXARGS_ENTRY_PTR(pos, LINUX_AT_RANDOM, imgp->canary);
190 AUXARGS_ENTRY(pos, LINUX_AT_HWCAP2, *imgp->sysent->sv_hwcap2);
191 if (imgp->execpathp != 0)
192 AUXARGS_ENTRY_PTR(pos, LINUX_AT_EXECFN, imgp->execpathp);
193 if (args->execfd != -1)
194 AUXARGS_ENTRY(pos, AT_EXECFD, args->execfd);
195 AUXARGS_ENTRY(pos, LINUX_AT_PLATFORM, PTROUT(linux_platform));
196 AUXARGS_ENTRY(pos, AT_NULL, 0);
197
198 free(imgp->auxargs, M_TEMP);
199 imgp->auxargs = NULL;
200 KASSERT(pos - argarray <= LINUX_AT_COUNT, ("Too many auxargs"));
201
202 error = copyout(argarray, (void *)base,
203 sizeof(*argarray) * LINUX_AT_COUNT);
204 free(argarray, M_TEMP);
205 return (error);
206 }
207
208 static int
linux_elf_fixup(uintptr_t * stack_base,struct image_params * imgp)209 linux_elf_fixup(uintptr_t *stack_base, struct image_params *imgp)
210 {
211
212 LIN_SDT_PROBE0(sysvec, linux_elf_fixup, todo);
213
214 return (0);
215 }
216
217 /*
218 * Copy strings out to the new process address space, constructing new arg
219 * and env vector tables. Return a pointer to the base so that it can be used
220 * as the initial stack pointer.
221 * LINUXTODO: deduplicate against other linuxulator archs
222 */
223 static int
linux_copyout_strings(struct image_params * imgp,uintptr_t * stack_base)224 linux_copyout_strings(struct image_params *imgp, uintptr_t *stack_base)
225 {
226 char **vectp;
227 char *stringp;
228 uintptr_t destp, ustringp;
229 struct ps_strings *arginfo;
230 char canary[LINUX_AT_RANDOM_LEN];
231 size_t execpath_len;
232 struct proc *p;
233 int argc, envc, error;
234
235 p = imgp->proc;
236 arginfo = (struct ps_strings *)PROC_PS_STRINGS(p);
237 destp = (uintptr_t)arginfo;
238
239 if (imgp->execpath != NULL && imgp->auxargs != NULL) {
240 execpath_len = strlen(imgp->execpath) + 1;
241 destp -= execpath_len;
242 destp = rounddown2(destp, sizeof(void *));
243 imgp->execpathp = (void *)destp;
244 error = copyout(imgp->execpath, imgp->execpathp, execpath_len);
245 if (error != 0)
246 return (error);
247 }
248
249 /* Prepare the canary for SSP. */
250 arc4rand(canary, sizeof(canary), 0);
251 destp -= roundup(sizeof(canary), sizeof(void *));
252 imgp->canary = (void *)destp;
253 error = copyout(canary, imgp->canary, sizeof(canary));
254 if (error != 0)
255 return (error);
256
257 /* Allocate room for the argument and environment strings. */
258 destp -= ARG_MAX - imgp->args->stringspace;
259 destp = rounddown2(destp, sizeof(void *));
260 ustringp = destp;
261
262 if (imgp->auxargs) {
263 /*
264 * Allocate room on the stack for the ELF auxargs
265 * array. It has up to LINUX_AT_COUNT entries.
266 */
267 destp -= LINUX_AT_COUNT * sizeof(Elf64_Auxinfo);
268 destp = rounddown2(destp, sizeof(void *));
269 }
270
271 vectp = (char **)destp;
272
273 /*
274 * Allocate room for argc and the argv[] and env vectors including the
275 * terminating NULL pointers.
276 */
277 vectp -= 1 + imgp->args->argc + 1 + imgp->args->envc + 1;
278 vectp = (char **)STACKALIGN(vectp);
279
280 /* vectp also becomes our initial stack base. */
281 *stack_base = (uintptr_t)vectp;
282
283 stringp = imgp->args->begin_argv;
284 argc = imgp->args->argc;
285 envc = imgp->args->envc;
286
287 /* Copy out strings - arguments and environment. */
288 error = copyout(stringp, (void *)ustringp,
289 ARG_MAX - imgp->args->stringspace);
290 if (error != 0)
291 return (error);
292
293 /* Fill in "ps_strings" struct for ps, w, etc. */
294 if (suword(&arginfo->ps_argvstr, (long)(intptr_t)vectp) != 0 ||
295 suword(&arginfo->ps_nargvstr, argc) != 0)
296 return (EFAULT);
297
298 if (suword(vectp++, argc) != 0)
299 return (EFAULT);
300
301 /* Fill in argument portion of vector table. */
302 for (; argc > 0; --argc) {
303 if (suword(vectp++, ustringp) != 0)
304 return (EFAULT);
305 while (*stringp++ != 0)
306 ustringp++;
307 ustringp++;
308 }
309
310 /* A null vector table pointer separates the argp's from the envp's. */
311 if (suword(vectp++, 0) != 0)
312 return (EFAULT);
313
314 if (suword(&arginfo->ps_envstr, (long)(intptr_t)vectp) != 0 ||
315 suword(&arginfo->ps_nenvstr, envc) != 0)
316 return (EFAULT);
317
318 /* Fill in environment portion of vector table. */
319 for (; envc > 0; --envc) {
320 if (suword(vectp++, ustringp) != 0)
321 return (EFAULT);
322 while (*stringp++ != 0)
323 ustringp++;
324 ustringp++;
325 }
326
327 /* The end of the vector table is a null pointer. */
328 if (suword(vectp, 0) != 0)
329 return (EFAULT);
330
331 if (imgp->auxargs) {
332 vectp++;
333 error = imgp->sysent->sv_copyout_auxargs(imgp,
334 (uintptr_t)vectp);
335 if (error != 0)
336 return (error);
337 }
338
339 return (0);
340 }
341
342 /*
343 * Reset registers to default values on exec.
344 */
345 static void
linux_exec_setregs(struct thread * td,struct image_params * imgp,uintptr_t stack)346 linux_exec_setregs(struct thread *td, struct image_params *imgp,
347 uintptr_t stack)
348 {
349 struct trapframe *regs = td->td_frame;
350 struct pcb *pcb = td->td_pcb;
351
352 /* LINUXTODO: validate */
353 LIN_SDT_PROBE0(sysvec, linux_exec_setregs, todo);
354
355 memset(regs, 0, sizeof(*regs));
356 /* glibc start.S registers function pointer in x0 with atexit. */
357 regs->tf_sp = stack;
358 #if 0 /* LINUXTODO: See if this is used. */
359 regs->tf_lr = imgp->entry_addr;
360 #else
361 regs->tf_lr = 0xffffffffffffffff;
362 #endif
363 regs->tf_elr = imgp->entry_addr;
364
365 pcb->pcb_tpidr_el0 = 0;
366 pcb->pcb_tpidrro_el0 = 0;
367 WRITE_SPECIALREG(tpidrro_el0, 0);
368 WRITE_SPECIALREG(tpidr_el0, 0);
369
370 #ifdef VFP
371 vfp_reset_state(td, pcb);
372 #endif
373
374 /*
375 * Clear debug register state. It is not applicable to the new process.
376 */
377 bzero(&pcb->pcb_dbg_regs, sizeof(pcb->pcb_dbg_regs));
378 }
379
380 int
linux_rt_sigreturn(struct thread * td,struct linux_rt_sigreturn_args * args)381 linux_rt_sigreturn(struct thread *td, struct linux_rt_sigreturn_args *args)
382 {
383
384 /* LINUXTODO: implement */
385 LIN_SDT_PROBE0(sysvec, linux_rt_sigreturn, todo);
386 return (EDOOFUS);
387 }
388
389 static void
linux_rt_sendsig(sig_t catcher,ksiginfo_t * ksi,sigset_t * mask)390 linux_rt_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
391 {
392
393 /* LINUXTODO: implement */
394 LIN_SDT_PROBE0(sysvec, linux_rt_sendsig, todo);
395 }
396
397 struct sysentvec elf_linux_sysvec = {
398 .sv_size = LINUX_SYS_MAXSYSCALL,
399 .sv_table = linux_sysent,
400 .sv_transtrap = linux_translate_traps,
401 .sv_fixup = linux_elf_fixup,
402 .sv_sendsig = linux_rt_sendsig,
403 .sv_sigcode = &_binary_linux_locore_o_start,
404 .sv_szsigcode = &linux_szsigcode,
405 .sv_name = "Linux ELF64",
406 .sv_coredump = elf64_coredump,
407 .sv_imgact_try = linux_exec_imgact_try,
408 .sv_minsigstksz = LINUX_MINSIGSTKSZ,
409 .sv_minuser = VM_MIN_ADDRESS,
410 .sv_maxuser = VM_MAXUSER_ADDRESS,
411 .sv_usrstack = USRSTACK,
412 .sv_psstrings = PS_STRINGS, /* XXX */
413 .sv_psstringssz = sizeof(struct ps_strings),
414 .sv_stackprot = VM_PROT_READ | VM_PROT_WRITE,
415 .sv_copyout_auxargs = linux_copyout_auxargs,
416 .sv_copyout_strings = linux_copyout_strings,
417 .sv_setregs = linux_exec_setregs,
418 .sv_fixlimit = NULL,
419 .sv_maxssiz = NULL,
420 .sv_flags = SV_ABI_LINUX | SV_LP64 | SV_SHP | SV_SIG_DISCIGN |
421 SV_SIG_WAITNDQ,
422 .sv_set_syscall_retval = linux_set_syscall_retval,
423 .sv_fetch_syscall_args = linux_fetch_syscall_args,
424 .sv_syscallnames = NULL,
425 .sv_shared_page_base = SHAREDPAGE,
426 .sv_shared_page_len = PAGE_SIZE,
427 .sv_schedtail = linux_schedtail,
428 .sv_thread_detach = linux_thread_detach,
429 .sv_trap = NULL,
430 .sv_hwcap = &elf_hwcap,
431 .sv_hwcap2 = &elf_hwcap2,
432 .sv_onexec = linux_on_exec,
433 .sv_onexit = linux_on_exit,
434 .sv_ontdexit = linux_thread_dtor,
435 .sv_setid_allowed = &linux_setid_allowed_query,
436 };
437
438 static void
linux_vdso_install(const void * param)439 linux_vdso_install(const void *param)
440 {
441
442 linux_szsigcode = (&_binary_linux_locore_o_end -
443 &_binary_linux_locore_o_start);
444
445 if (linux_szsigcode > elf_linux_sysvec.sv_shared_page_len)
446 panic("invalid Linux VDSO size\n");
447
448 __elfN(linux_vdso_fixup)(&elf_linux_sysvec);
449
450 linux_shared_page_obj = __elfN(linux_shared_page_init)
451 (&linux_shared_page_mapping);
452
453 __elfN(linux_vdso_reloc)(&elf_linux_sysvec);
454
455 memcpy(linux_shared_page_mapping, elf_linux_sysvec.sv_sigcode,
456 linux_szsigcode);
457 elf_linux_sysvec.sv_shared_page_obj = linux_shared_page_obj;
458
459 linux_kplatform = linux_shared_page_mapping +
460 (linux_platform - (caddr_t)elf_linux_sysvec.sv_shared_page_base);
461 }
462 SYSINIT(elf_linux_vdso_init, SI_SUB_EXEC, SI_ORDER_ANY,
463 linux_vdso_install, NULL);
464
465 static void
linux_vdso_deinstall(const void * param)466 linux_vdso_deinstall(const void *param)
467 {
468
469 LIN_SDT_PROBE0(sysvec, linux_vdso_deinstall, todo);
470 __elfN(linux_shared_page_fini)(linux_shared_page_obj,
471 linux_shared_page_mapping);
472 }
473 SYSUNINIT(elf_linux_vdso_uninit, SI_SUB_EXEC, SI_ORDER_FIRST,
474 linux_vdso_deinstall, NULL);
475
476 static char GNU_ABI_VENDOR[] = "GNU";
477 static int GNU_ABI_LINUX = 0;
478
479 /* LINUXTODO: deduplicate */
480 static bool
linux_trans_osrel(const Elf_Note * note,int32_t * osrel)481 linux_trans_osrel(const Elf_Note *note, int32_t *osrel)
482 {
483 const Elf32_Word *desc;
484 uintptr_t p;
485
486 p = (uintptr_t)(note + 1);
487 p += roundup2(note->n_namesz, sizeof(Elf32_Addr));
488
489 desc = (const Elf32_Word *)p;
490 if (desc[0] != GNU_ABI_LINUX)
491 return (false);
492
493 *osrel = LINUX_KERNVER(desc[1], desc[2], desc[3]);
494 return (true);
495 }
496
497 static Elf_Brandnote linux64_brandnote = {
498 .hdr.n_namesz = sizeof(GNU_ABI_VENDOR),
499 .hdr.n_descsz = 16,
500 .hdr.n_type = 1,
501 .vendor = GNU_ABI_VENDOR,
502 .flags = BN_TRANSLATE_OSREL,
503 .trans_osrel = linux_trans_osrel
504 };
505
506 static Elf64_Brandinfo linux_glibc2brand = {
507 .brand = ELFOSABI_LINUX,
508 .machine = EM_AARCH64,
509 .compat_3_brand = "Linux",
510 .emul_path = linux_emul_path,
511 .interp_path = "/lib64/ld-linux-x86-64.so.2",
512 .sysvec = &elf_linux_sysvec,
513 .interp_newpath = NULL,
514 .brand_note = &linux64_brandnote,
515 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
516 };
517
518 Elf64_Brandinfo *linux_brandlist[] = {
519 &linux_glibc2brand,
520 NULL
521 };
522
523 static int
linux64_elf_modevent(module_t mod,int type,void * data)524 linux64_elf_modevent(module_t mod, int type, void *data)
525 {
526 Elf64_Brandinfo **brandinfo;
527 struct linux_ioctl_handler**lihp;
528 int error;
529
530 error = 0;
531 switch(type) {
532 case MOD_LOAD:
533 for (brandinfo = &linux_brandlist[0]; *brandinfo != NULL;
534 ++brandinfo)
535 if (elf64_insert_brand_entry(*brandinfo) < 0)
536 error = EINVAL;
537 if (error == 0) {
538 SET_FOREACH(lihp, linux_ioctl_handler_set)
539 linux_ioctl_register_handler(*lihp);
540 stclohz = (stathz ? stathz : hz);
541 if (bootverbose)
542 printf("Linux arm64 ELF exec handler installed\n");
543 }
544 break;
545 case MOD_UNLOAD:
546 for (brandinfo = &linux_brandlist[0]; *brandinfo != NULL;
547 ++brandinfo)
548 if (elf64_brand_inuse(*brandinfo))
549 error = EBUSY;
550 if (error == 0) {
551 for (brandinfo = &linux_brandlist[0];
552 *brandinfo != NULL; ++brandinfo)
553 if (elf64_remove_brand_entry(*brandinfo) < 0)
554 error = EINVAL;
555 }
556 if (error == 0) {
557 SET_FOREACH(lihp, linux_ioctl_handler_set)
558 linux_ioctl_unregister_handler(*lihp);
559 if (bootverbose)
560 printf("Linux ELF exec handler removed\n");
561 } else
562 printf("Could not deinstall ELF interpreter entry\n");
563 break;
564 default:
565 return (EOPNOTSUPP);
566 }
567 return (error);
568 }
569
570 static moduledata_t linux64_elf_mod = {
571 "linux64elf",
572 linux64_elf_modevent,
573 0
574 };
575
576 DECLARE_MODULE_TIED(linux64elf, linux64_elf_mod, SI_SUB_EXEC, SI_ORDER_ANY);
577 MODULE_DEPEND(linux64elf, linux_common, 1, 1, 1);
578 FEATURE(linux64, "AArch64 Linux 64bit support");
579