1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 #define __ELF_WORD_SIZE 64 33 34 #include <sys/param.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/ktr.h> 41 #include <sys/lock.h> 42 #include <sys/module.h> 43 #include <sys/mutex.h> 44 #include <sys/proc.h> 45 #include <sys/stddef.h> 46 #include <sys/syscallsubr.h> 47 #include <sys/sysctl.h> 48 #include <sys/sysent.h> 49 50 #include <vm/pmap.h> 51 #include <vm/vm.h> 52 #include <vm/vm_map.h> 53 #include <vm/vm_page.h> 54 55 #include <arm64/linux/linux.h> 56 #include <arm64/linux/linux_proto.h> 57 #include <compat/linux/linux_dtrace.h> 58 #include <compat/linux/linux_elf.h> 59 #include <compat/linux/linux_emul.h> 60 #include <compat/linux/linux_fork.h> 61 #include <compat/linux/linux_ioctl.h> 62 #include <compat/linux/linux_mib.h> 63 #include <compat/linux/linux_misc.h> 64 #include <compat/linux/linux_signal.h> 65 #include <compat/linux/linux_util.h> 66 #include <compat/linux/linux_vdso.h> 67 68 #include <arm64/linux/linux_sigframe.h> 69 70 #include <machine/md_var.h> 71 #include <machine/pcb.h> 72 #ifdef VFP 73 #include <machine/vfp.h> 74 #endif 75 76 MODULE_VERSION(linux64elf, 1); 77 78 #define LINUX_VDSOPAGE_SIZE PAGE_SIZE * 2 79 #define LINUX_VDSOPAGE (VM_MAXUSER_ADDRESS - \ 80 LINUX_VDSOPAGE_SIZE) 81 #define LINUX_SHAREDPAGE (LINUX_VDSOPAGE - PAGE_SIZE) 82 /* 83 * PAGE_SIZE - the size 84 * of the native SHAREDPAGE 85 */ 86 #define LINUX_USRSTACK LINUX_SHAREDPAGE 87 #define LINUX_PS_STRINGS (LINUX_USRSTACK - \ 88 sizeof(struct ps_strings)) 89 90 static int linux_szsigcode; 91 static vm_object_t linux_vdso_obj; 92 static char *linux_vdso_mapping; 93 extern char _binary_linux_vdso_so_o_start; 94 extern char _binary_linux_vdso_so_o_end; 95 static vm_offset_t linux_vdso_base; 96 97 extern struct sysent linux_sysent[LINUX_SYS_MAXSYSCALL]; 98 extern const char *linux_syscallnames[]; 99 100 SET_DECLARE(linux_ioctl_handler_set, struct linux_ioctl_handler); 101 102 static void linux_vdso_install(const void *param); 103 static void linux_vdso_deinstall(const void *param); 104 static void linux_vdso_reloc(char *mapping, Elf_Addr offset); 105 static void linux_set_syscall_retval(struct thread *td, int error); 106 static int linux_fetch_syscall_args(struct thread *td); 107 static void linux_exec_setregs(struct thread *td, struct image_params *imgp, 108 uintptr_t stack); 109 static void linux_exec_sysvec_init(void *param); 110 static int linux_on_exec_vmspace(struct proc *p, 111 struct image_params *imgp); 112 113 /* DTrace init */ 114 LIN_SDT_PROVIDER_DECLARE(LINUX_DTRACE); 115 116 /* DTrace probes */ 117 LIN_SDT_PROBE_DEFINE0(sysvec, linux_exec_setregs, todo); 118 119 LINUX_VDSO_SYM_CHAR(linux_platform); 120 LINUX_VDSO_SYM_INTPTR(kern_timekeep_base); 121 LINUX_VDSO_SYM_INTPTR(__user_rt_sigreturn); 122 123 static int 124 linux_fetch_syscall_args(struct thread *td) 125 { 126 struct proc *p; 127 struct syscall_args *sa; 128 register_t *ap; 129 130 p = td->td_proc; 131 ap = td->td_frame->tf_x; 132 sa = &td->td_sa; 133 134 sa->code = td->td_frame->tf_x[8]; 135 sa->original_code = sa->code; 136 /* LINUXTODO: generic syscall? */ 137 if (sa->code >= p->p_sysent->sv_size) 138 sa->callp = &p->p_sysent->sv_table[0]; 139 else 140 sa->callp = &p->p_sysent->sv_table[sa->code]; 141 142 if (sa->callp->sy_narg > nitems(sa->args)) 143 panic("ARM64TODO: Could we have more than %zu args?", 144 nitems(sa->args)); 145 memcpy(sa->args, ap, nitems(sa->args) * sizeof(register_t)); 146 147 td->td_retval[0] = 0; 148 return (0); 149 } 150 151 static void 152 linux_set_syscall_retval(struct thread *td, int error) 153 { 154 155 td->td_retval[1] = td->td_frame->tf_x[1]; 156 cpu_set_syscall_retval(td, error); 157 158 if (__predict_false(error != 0)) { 159 if (error != ERESTART && error != EJUSTRETURN) 160 td->td_frame->tf_x[0] = bsd_to_linux_errno(error); 161 } 162 } 163 164 void 165 linux64_arch_copyout_auxargs(struct image_params *imgp, Elf_Auxinfo **pos) 166 { 167 168 AUXARGS_ENTRY((*pos), LINUX_AT_SYSINFO_EHDR, linux_vdso_base); 169 AUXARGS_ENTRY((*pos), LINUX_AT_HWCAP, *imgp->sysent->sv_hwcap); 170 AUXARGS_ENTRY((*pos), LINUX_AT_HWCAP2, *imgp->sysent->sv_hwcap2); 171 AUXARGS_ENTRY((*pos), LINUX_AT_PLATFORM, PTROUT(linux_platform)); 172 } 173 174 /* 175 * Reset registers to default values on exec. 176 */ 177 static void 178 linux_exec_setregs(struct thread *td, struct image_params *imgp, 179 uintptr_t stack) 180 { 181 struct trapframe *regs = td->td_frame; 182 struct pcb *pcb = td->td_pcb; 183 184 /* LINUXTODO: validate */ 185 LIN_SDT_PROBE0(sysvec, linux_exec_setregs, todo); 186 187 memset(regs, 0, sizeof(*regs)); 188 /* glibc start.S registers function pointer in x0 with atexit. */ 189 regs->tf_sp = stack; 190 #if 0 /* LINUXTODO: See if this is used. */ 191 regs->tf_lr = imgp->entry_addr; 192 #else 193 regs->tf_lr = 0xffffffffffffffff; 194 #endif 195 regs->tf_elr = imgp->entry_addr; 196 197 pcb->pcb_tpidr_el0 = 0; 198 pcb->pcb_tpidrro_el0 = 0; 199 WRITE_SPECIALREG(tpidrro_el0, 0); 200 WRITE_SPECIALREG(tpidr_el0, 0); 201 202 #ifdef VFP 203 vfp_reset_state(td, pcb); 204 #endif 205 206 /* 207 * Clear debug register state. It is not applicable to the new process. 208 */ 209 bzero(&pcb->pcb_dbg_regs, sizeof(pcb->pcb_dbg_regs)); 210 } 211 212 int 213 linux_rt_sigreturn(struct thread *td, struct linux_rt_sigreturn_args *args) 214 { 215 struct l_sigframe *frame; 216 ucontext_t uc; 217 struct trapframe *tf; 218 int error; 219 220 tf = td->td_frame; 221 frame = (struct l_sigframe *)tf->tf_sp; 222 223 if (copyin((void *)&frame->uc, &uc, sizeof(uc))) 224 return (EFAULT); 225 226 error = set_mcontext(td, &uc.uc_mcontext); 227 if (error != 0) 228 return (error); 229 230 /* Restore signal mask. */ 231 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0); 232 233 return (EJUSTRETURN); 234 } 235 236 static void 237 linux_rt_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) 238 { 239 struct thread *td; 240 struct proc *p; 241 struct trapframe *tf; 242 struct l_sigframe *fp, *frame; 243 struct l_fpsimd_context *fpsimd; 244 struct l_esr_context *esr; 245 l_stack_t uc_stack; 246 ucontext_t uc; 247 uint8_t *scr; 248 struct sigacts *psp; 249 int onstack, sig, issiginfo; 250 251 td = curthread; 252 p = td->td_proc; 253 PROC_LOCK_ASSERT(p, MA_OWNED); 254 255 sig = ksi->ksi_signo; 256 psp = p->p_sigacts; 257 mtx_assert(&psp->ps_mtx, MA_OWNED); 258 259 tf = td->td_frame; 260 onstack = sigonstack(tf->tf_sp); 261 issiginfo = SIGISMEMBER(psp->ps_siginfo, sig); 262 263 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm, 264 catcher, sig); 265 266 /* Allocate and validate space for the signal handler context. */ 267 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !onstack && 268 SIGISMEMBER(psp->ps_sigonstack, sig)) { 269 fp = (struct l_sigframe *)((uintptr_t)td->td_sigstk.ss_sp + 270 td->td_sigstk.ss_size); 271 #if defined(COMPAT_43) 272 td->td_sigstk.ss_flags |= SS_ONSTACK; 273 #endif 274 } else { 275 fp = (struct l_sigframe *)td->td_frame->tf_sp; 276 } 277 278 /* Make room, keeping the stack aligned */ 279 fp--; 280 fp = (struct l_sigframe *)STACKALIGN(fp); 281 282 get_mcontext(td, &uc.uc_mcontext, 0); 283 uc.uc_sigmask = *mask; 284 285 uc_stack.ss_sp = PTROUT(td->td_sigstk.ss_sp); 286 uc_stack.ss_size = td->td_sigstk.ss_size; 287 uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) != 0 ? 288 (onstack ? LINUX_SS_ONSTACK : 0) : LINUX_SS_DISABLE; 289 mtx_unlock(&psp->ps_mtx); 290 PROC_UNLOCK(td->td_proc); 291 292 /* Fill in the frame to copy out */ 293 frame = malloc(sizeof(*frame), M_LINUX, M_WAITOK | M_ZERO); 294 295 memcpy(&frame->sf.sf_uc.uc_sc.regs, tf->tf_x, sizeof(tf->tf_x)); 296 frame->sf.sf_uc.uc_sc.regs[30] = tf->tf_lr; 297 frame->sf.sf_uc.uc_sc.sp = tf->tf_sp; 298 frame->sf.sf_uc.uc_sc.pc = tf->tf_elr; 299 frame->sf.sf_uc.uc_sc.pstate = tf->tf_spsr; 300 frame->sf.sf_uc.uc_sc.fault_address = (register_t)ksi->ksi_addr; 301 302 /* Stack frame for unwinding */ 303 frame->fp = tf->tf_x[29]; 304 frame->lr = tf->tf_elr; 305 306 /* Translate the signal. */ 307 sig = bsd_to_linux_signal(sig); 308 siginfo_to_lsiginfo(&ksi->ksi_info, &frame->sf.sf_si, sig); 309 bsd_to_linux_sigset(mask, &frame->sf.sf_uc.uc_sigmask); 310 311 /* 312 * Prepare fpsimd & esr. Does not check sizes, as 313 * __reserved is big enougth. 314 */ 315 scr = (uint8_t *)&frame->sf.sf_uc.uc_sc.__reserved; 316 #ifdef VFP 317 fpsimd = (struct l_fpsimd_context *) scr; 318 fpsimd->head.magic = L_FPSIMD_MAGIC; 319 fpsimd->head.size = sizeof(struct l_fpsimd_context); 320 fpsimd->fpsr = uc.uc_mcontext.mc_fpregs.fp_sr; 321 fpsimd->fpcr = uc.uc_mcontext.mc_fpregs.fp_cr; 322 323 memcpy(fpsimd->vregs, &uc.uc_mcontext.mc_fpregs.fp_q, 324 sizeof(uc.uc_mcontext.mc_fpregs.fp_q)); 325 scr += roundup(sizeof(struct l_fpsimd_context), 16); 326 #endif 327 if (ksi->ksi_addr != 0) { 328 esr = (struct l_esr_context *) scr; 329 esr->head.magic = L_ESR_MAGIC; 330 esr->head.size = sizeof(struct l_esr_context); 331 esr->esr = tf->tf_esr; 332 } 333 334 memcpy(&frame->sf.sf_uc.uc_stack, &uc_stack, sizeof(uc_stack)); 335 memcpy(&frame->uc, &uc, sizeof(uc)); 336 337 /* Copy the sigframe out to the user's stack. */ 338 if (copyout(frame, fp, sizeof(*fp)) != 0) { 339 /* Process has trashed its stack. Kill it. */ 340 free(frame, M_LINUX); 341 CTR2(KTR_SIG, "sendsig: sigexit td=%p fp=%p", td, fp); 342 PROC_LOCK(p); 343 sigexit(td, SIGILL); 344 } 345 free(frame, M_LINUX); 346 347 tf->tf_x[0]= sig; 348 if (issiginfo) { 349 tf->tf_x[1] = (register_t)&fp->sf.sf_si; 350 tf->tf_x[2] = (register_t)&fp->sf.sf_uc; 351 } else { 352 tf->tf_x[1] = 0; 353 tf->tf_x[2] = 0; 354 } 355 tf->tf_x[29] = (register_t)&fp->fp; 356 tf->tf_elr = (register_t)catcher; 357 tf->tf_sp = (register_t)fp; 358 tf->tf_lr = (register_t)__user_rt_sigreturn; 359 360 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, tf->tf_elr, 361 tf->tf_sp); 362 363 PROC_LOCK(p); 364 mtx_lock(&psp->ps_mtx); 365 } 366 367 struct sysentvec elf_linux_sysvec = { 368 .sv_size = LINUX_SYS_MAXSYSCALL, 369 .sv_table = linux_sysent, 370 .sv_fixup = __elfN(freebsd_fixup), 371 .sv_sendsig = linux_rt_sendsig, 372 .sv_sigcode = &_binary_linux_vdso_so_o_start, 373 .sv_szsigcode = &linux_szsigcode, 374 .sv_name = "Linux ELF64", 375 .sv_coredump = elf64_coredump, 376 .sv_elf_core_osabi = ELFOSABI_NONE, 377 .sv_elf_core_abi_vendor = LINUX_ABI_VENDOR, 378 .sv_elf_core_prepare_notes = linux64_prepare_notes, 379 .sv_minsigstksz = LINUX_MINSIGSTKSZ, 380 .sv_minuser = VM_MIN_ADDRESS, 381 .sv_maxuser = VM_MAXUSER_ADDRESS, 382 .sv_usrstack = LINUX_USRSTACK, 383 .sv_psstrings = LINUX_PS_STRINGS, 384 .sv_psstringssz = sizeof(struct ps_strings), 385 .sv_stackprot = VM_PROT_READ | VM_PROT_WRITE, 386 .sv_copyout_auxargs = __linuxN(copyout_auxargs), 387 .sv_copyout_strings = __linuxN(copyout_strings), 388 .sv_setregs = linux_exec_setregs, 389 .sv_fixlimit = NULL, 390 .sv_maxssiz = NULL, 391 .sv_flags = SV_ABI_LINUX | SV_LP64 | SV_SHP | SV_SIG_DISCIGN | 392 SV_SIG_WAITNDQ | SV_TIMEKEEP, 393 .sv_set_syscall_retval = linux_set_syscall_retval, 394 .sv_fetch_syscall_args = linux_fetch_syscall_args, 395 .sv_syscallnames = linux_syscallnames, 396 .sv_shared_page_base = LINUX_SHAREDPAGE, 397 .sv_shared_page_len = PAGE_SIZE, 398 .sv_schedtail = linux_schedtail, 399 .sv_thread_detach = linux_thread_detach, 400 .sv_trap = NULL, 401 .sv_hwcap = &elf_hwcap, 402 .sv_hwcap2 = &elf_hwcap2, 403 .sv_onexec = linux_on_exec_vmspace, 404 .sv_onexit = linux_on_exit, 405 .sv_ontdexit = linux_thread_dtor, 406 .sv_setid_allowed = &linux_setid_allowed_query, 407 }; 408 409 static int 410 linux_on_exec_vmspace(struct proc *p, struct image_params *imgp) 411 { 412 int error; 413 414 error = linux_map_vdso(p, linux_vdso_obj, linux_vdso_base, 415 LINUX_VDSOPAGE_SIZE, imgp); 416 if (error == 0) 417 error = linux_on_exec(p, imgp); 418 return (error); 419 } 420 421 /* 422 * linux_vdso_install() and linux_exec_sysvec_init() must be called 423 * after exec_sysvec_init() which is SI_SUB_EXEC (SI_ORDER_ANY). 424 */ 425 static void 426 linux_exec_sysvec_init(void *param) 427 { 428 l_uintptr_t *ktimekeep_base; 429 struct sysentvec *sv; 430 ptrdiff_t tkoff; 431 432 sv = param; 433 /* Fill timekeep_base */ 434 exec_sysvec_init(sv); 435 436 tkoff = kern_timekeep_base - linux_vdso_base; 437 ktimekeep_base = (l_uintptr_t *)(linux_vdso_mapping + tkoff); 438 *ktimekeep_base = sv->sv_shared_page_base + sv->sv_timekeep_offset; 439 } 440 SYSINIT(elf_linux_exec_sysvec_init, SI_SUB_EXEC + 1, SI_ORDER_ANY, 441 linux_exec_sysvec_init, &elf_linux_sysvec); 442 443 static void 444 linux_vdso_install(const void *param) 445 { 446 char *vdso_start = &_binary_linux_vdso_so_o_start; 447 char *vdso_end = &_binary_linux_vdso_so_o_end; 448 449 linux_szsigcode = vdso_end - vdso_start; 450 MPASS(linux_szsigcode <= LINUX_VDSOPAGE_SIZE); 451 452 linux_vdso_base = LINUX_VDSOPAGE; 453 454 __elfN(linux_vdso_fixup)(vdso_start, linux_vdso_base); 455 456 linux_vdso_obj = __elfN(linux_shared_page_init) 457 (&linux_vdso_mapping, LINUX_VDSOPAGE_SIZE); 458 bcopy(vdso_start, linux_vdso_mapping, linux_szsigcode); 459 460 linux_vdso_reloc(linux_vdso_mapping, linux_vdso_base); 461 } 462 SYSINIT(elf_linux_vdso_init, SI_SUB_EXEC + 1, SI_ORDER_FIRST, 463 linux_vdso_install, NULL); 464 465 static void 466 linux_vdso_deinstall(const void *param) 467 { 468 469 __elfN(linux_shared_page_fini)(linux_vdso_obj, 470 linux_vdso_mapping, LINUX_VDSOPAGE_SIZE); 471 } 472 SYSUNINIT(elf_linux_vdso_uninit, SI_SUB_EXEC, SI_ORDER_FIRST, 473 linux_vdso_deinstall, NULL); 474 475 static void 476 linux_vdso_reloc(char *mapping, Elf_Addr offset) 477 { 478 Elf_Size rtype, symidx; 479 const Elf_Rela *rela; 480 const Elf_Shdr *shdr; 481 const Elf_Ehdr *ehdr; 482 Elf_Addr *where; 483 Elf_Addr addr, addend; 484 int i, relacnt; 485 486 MPASS(offset != 0); 487 488 relacnt = 0; 489 ehdr = (const Elf_Ehdr *)mapping; 490 shdr = (const Elf_Shdr *)(mapping + ehdr->e_shoff); 491 for (i = 0; i < ehdr->e_shnum; i++) 492 { 493 switch (shdr[i].sh_type) { 494 case SHT_REL: 495 printf("Linux Aarch64 vDSO: unexpected Rel section\n"); 496 break; 497 case SHT_RELA: 498 rela = (const Elf_Rela *)(mapping + shdr[i].sh_offset); 499 relacnt = shdr[i].sh_size / sizeof(*rela); 500 } 501 } 502 503 for (i = 0; i < relacnt; i++, rela++) { 504 where = (Elf_Addr *)(mapping + rela->r_offset); 505 addend = rela->r_addend; 506 rtype = ELF_R_TYPE(rela->r_info); 507 symidx = ELF_R_SYM(rela->r_info); 508 509 switch (rtype) { 510 case R_AARCH64_NONE: /* none */ 511 break; 512 513 case R_AARCH64_RELATIVE: /* B + A */ 514 addr = (Elf_Addr)(mapping + addend); 515 if (*where != addr) 516 *where = addr; 517 break; 518 default: 519 printf("Linux Aarch64 vDSO: unexpected relocation type %ld, " 520 "symbol index %ld\n", rtype, symidx); 521 } 522 } 523 } 524 525 static Elf_Brandnote linux64_brandnote = { 526 .hdr.n_namesz = sizeof(GNU_ABI_VENDOR), 527 .hdr.n_descsz = 16, 528 .hdr.n_type = 1, 529 .vendor = GNU_ABI_VENDOR, 530 .flags = BN_TRANSLATE_OSREL, 531 .trans_osrel = linux_trans_osrel 532 }; 533 534 static Elf64_Brandinfo linux_glibc2brand = { 535 .brand = ELFOSABI_LINUX, 536 .machine = EM_AARCH64, 537 .compat_3_brand = "Linux", 538 .interp_path = "/lib64/ld-linux-x86-64.so.2", 539 .sysvec = &elf_linux_sysvec, 540 .interp_newpath = NULL, 541 .brand_note = &linux64_brandnote, 542 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 543 }; 544 545 Elf64_Brandinfo *linux_brandlist[] = { 546 &linux_glibc2brand, 547 NULL 548 }; 549 550 static int 551 linux64_elf_modevent(module_t mod, int type, void *data) 552 { 553 Elf64_Brandinfo **brandinfo; 554 struct linux_ioctl_handler**lihp; 555 int error; 556 557 error = 0; 558 switch(type) { 559 case MOD_LOAD: 560 for (brandinfo = &linux_brandlist[0]; *brandinfo != NULL; 561 ++brandinfo) 562 if (elf64_insert_brand_entry(*brandinfo) < 0) 563 error = EINVAL; 564 if (error == 0) { 565 SET_FOREACH(lihp, linux_ioctl_handler_set) 566 linux_ioctl_register_handler(*lihp); 567 stclohz = (stathz ? stathz : hz); 568 if (bootverbose) 569 printf("Linux arm64 ELF exec handler installed\n"); 570 } 571 break; 572 case MOD_UNLOAD: 573 for (brandinfo = &linux_brandlist[0]; *brandinfo != NULL; 574 ++brandinfo) 575 if (elf64_brand_inuse(*brandinfo)) 576 error = EBUSY; 577 if (error == 0) { 578 for (brandinfo = &linux_brandlist[0]; 579 *brandinfo != NULL; ++brandinfo) 580 if (elf64_remove_brand_entry(*brandinfo) < 0) 581 error = EINVAL; 582 } 583 if (error == 0) { 584 SET_FOREACH(lihp, linux_ioctl_handler_set) 585 linux_ioctl_unregister_handler(*lihp); 586 if (bootverbose) 587 printf("Linux arm64 ELF exec handler removed\n"); 588 } else 589 printf("Could not deinstall Linux arm64 ELF interpreter entry\n"); 590 break; 591 default: 592 return (EOPNOTSUPP); 593 } 594 return (error); 595 } 596 597 static moduledata_t linux64_elf_mod = { 598 "linux64elf", 599 linux64_elf_modevent, 600 0 601 }; 602 603 DECLARE_MODULE_TIED(linux64elf, linux64_elf_mod, SI_SUB_EXEC, SI_ORDER_ANY); 604 MODULE_DEPEND(linux64elf, linux_common, 1, 1, 1); 605 FEATURE(linux64, "AArch64 Linux 64bit support"); 606