1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 1994-1996 Søren Schmidt 5 * All rights reserved. 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/exec.h> 35 #include <sys/fcntl.h> 36 #include <sys/imgact.h> 37 #include <sys/imgact_aout.h> 38 #include <sys/imgact_elf.h> 39 #include <sys/kernel.h> 40 #include <sys/lock.h> 41 #include <sys/malloc.h> 42 #include <sys/module.h> 43 #include <sys/mutex.h> 44 #include <sys/proc.h> 45 #include <sys/signalvar.h> 46 #include <sys/syscallsubr.h> 47 #include <sys/sysctl.h> 48 #include <sys/sysent.h> 49 #include <sys/sysproto.h> 50 #include <sys/vnode.h> 51 #include <sys/eventhandler.h> 52 53 #include <vm/vm.h> 54 #include <vm/pmap.h> 55 #include <vm/vm_extern.h> 56 #include <vm/vm_map.h> 57 #include <vm/vm_object.h> 58 #include <vm/vm_page.h> 59 #include <vm/vm_param.h> 60 61 #include <machine/cpu.h> 62 #include <machine/cputypes.h> 63 #include <machine/md_var.h> 64 #include <machine/pcb.h> 65 66 #include <i386/linux/linux.h> 67 #include <i386/linux/linux_proto.h> 68 #include <compat/linux/linux_emul.h> 69 #include <compat/linux/linux_futex.h> 70 #include <compat/linux/linux_ioctl.h> 71 #include <compat/linux/linux_mib.h> 72 #include <compat/linux/linux_misc.h> 73 #include <compat/linux/linux_signal.h> 74 #include <compat/linux/linux_util.h> 75 #include <compat/linux/linux_vdso.h> 76 77 MODULE_VERSION(linux, 1); 78 79 #if BYTE_ORDER == LITTLE_ENDIAN 80 #define SHELLMAGIC 0x2123 /* #! */ 81 #else 82 #define SHELLMAGIC 0x2321 83 #endif 84 85 #if defined(DEBUG) 86 SYSCTL_PROC(_compat_linux, OID_AUTO, debug, CTLTYPE_STRING | CTLFLAG_RW, 0, 0, 87 linux_sysctl_debug, "A", "Linux debugging control"); 88 #endif 89 90 /* 91 * Allow the sendsig functions to use the ldebug() facility even though they 92 * are not syscalls themselves. Map them to syscall 0. This is slightly less 93 * bogus than using ldebug(sigreturn). 94 */ 95 #define LINUX_SYS_linux_rt_sendsig 0 96 #define LINUX_SYS_linux_sendsig 0 97 98 #define LINUX_PS_STRINGS (LINUX_USRSTACK - sizeof(struct ps_strings)) 99 100 static int linux_szsigcode; 101 static vm_object_t linux_shared_page_obj; 102 static char *linux_shared_page_mapping; 103 extern char _binary_linux_locore_o_start; 104 extern char _binary_linux_locore_o_end; 105 106 extern struct sysent linux_sysent[LINUX_SYS_MAXSYSCALL]; 107 108 SET_DECLARE(linux_ioctl_handler_set, struct linux_ioctl_handler); 109 110 static int linux_fixup(register_t **stack_base, 111 struct image_params *iparams); 112 static int linux_fixup_elf(register_t **stack_base, 113 struct image_params *iparams); 114 static void linux_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask); 115 static int linux_exec_imgact_try(struct image_params *iparams); 116 static void linux_exec_setregs(struct thread *td, 117 struct image_params *imgp, u_long stack); 118 static register_t *linux_copyout_strings(struct image_params *imgp); 119 static bool linux_trans_osrel(const Elf_Note *note, int32_t *osrel); 120 static void linux_vdso_install(void *param); 121 static void linux_vdso_deinstall(void *param); 122 123 static int linux_szplatform; 124 const char *linux_kplatform; 125 126 static eventhandler_tag linux_exit_tag; 127 static eventhandler_tag linux_exec_tag; 128 static eventhandler_tag linux_thread_dtor_tag; 129 130 #define LINUX_T_UNKNOWN 255 131 static int _bsd_to_linux_trapcode[] = { 132 LINUX_T_UNKNOWN, /* 0 */ 133 6, /* 1 T_PRIVINFLT */ 134 LINUX_T_UNKNOWN, /* 2 */ 135 3, /* 3 T_BPTFLT */ 136 LINUX_T_UNKNOWN, /* 4 */ 137 LINUX_T_UNKNOWN, /* 5 */ 138 16, /* 6 T_ARITHTRAP */ 139 254, /* 7 T_ASTFLT */ 140 LINUX_T_UNKNOWN, /* 8 */ 141 13, /* 9 T_PROTFLT */ 142 1, /* 10 T_TRCTRAP */ 143 LINUX_T_UNKNOWN, /* 11 */ 144 14, /* 12 T_PAGEFLT */ 145 LINUX_T_UNKNOWN, /* 13 */ 146 17, /* 14 T_ALIGNFLT */ 147 LINUX_T_UNKNOWN, /* 15 */ 148 LINUX_T_UNKNOWN, /* 16 */ 149 LINUX_T_UNKNOWN, /* 17 */ 150 0, /* 18 T_DIVIDE */ 151 2, /* 19 T_NMI */ 152 4, /* 20 T_OFLOW */ 153 5, /* 21 T_BOUND */ 154 7, /* 22 T_DNA */ 155 8, /* 23 T_DOUBLEFLT */ 156 9, /* 24 T_FPOPFLT */ 157 10, /* 25 T_TSSFLT */ 158 11, /* 26 T_SEGNPFLT */ 159 12, /* 27 T_STKFLT */ 160 18, /* 28 T_MCHK */ 161 19, /* 29 T_XMMFLT */ 162 15 /* 30 T_RESERVED */ 163 }; 164 #define bsd_to_linux_trapcode(code) \ 165 ((code)<nitems(_bsd_to_linux_trapcode)? \ 166 _bsd_to_linux_trapcode[(code)]: \ 167 LINUX_T_UNKNOWN) 168 169 LINUX_VDSO_SYM_INTPTR(linux_sigcode); 170 LINUX_VDSO_SYM_INTPTR(linux_rt_sigcode); 171 LINUX_VDSO_SYM_INTPTR(linux_vsyscall); 172 173 /* 174 * If FreeBSD & Linux have a difference of opinion about what a trap 175 * means, deal with it here. 176 * 177 * MPSAFE 178 */ 179 static int 180 linux_translate_traps(int signal, int trap_code) 181 { 182 if (signal != SIGBUS) 183 return (signal); 184 switch (trap_code) { 185 case T_PROTFLT: 186 case T_TSSFLT: 187 case T_DOUBLEFLT: 188 case T_PAGEFLT: 189 return (SIGSEGV); 190 default: 191 return (signal); 192 } 193 } 194 195 static int 196 linux_fixup(register_t **stack_base, struct image_params *imgp) 197 { 198 register_t *argv, *envp; 199 200 argv = *stack_base; 201 envp = *stack_base + (imgp->args->argc + 1); 202 (*stack_base)--; 203 suword(*stack_base, (intptr_t)(void *)envp); 204 (*stack_base)--; 205 suword(*stack_base, (intptr_t)(void *)argv); 206 (*stack_base)--; 207 suword(*stack_base, imgp->args->argc); 208 return (0); 209 } 210 211 static int 212 linux_fixup_elf(register_t **stack_base, struct image_params *imgp) 213 { 214 struct proc *p; 215 Elf32_Auxargs *args; 216 Elf32_Addr *uplatform; 217 struct ps_strings *arginfo; 218 register_t *pos; 219 int issetugid; 220 221 KASSERT(curthread->td_proc == imgp->proc, 222 ("unsafe linux_fixup_elf(), should be curproc")); 223 224 p = imgp->proc; 225 issetugid = imgp->proc->p_flag & P_SUGID ? 1 : 0; 226 arginfo = (struct ps_strings *)p->p_sysent->sv_psstrings; 227 uplatform = (Elf32_Addr *)((caddr_t)arginfo - linux_szplatform); 228 args = (Elf32_Auxargs *)imgp->auxargs; 229 pos = *stack_base + (imgp->args->argc + imgp->args->envc + 2); 230 231 AUXARGS_ENTRY(pos, LINUX_AT_SYSINFO_EHDR, 232 imgp->proc->p_sysent->sv_shared_page_base); 233 AUXARGS_ENTRY(pos, LINUX_AT_SYSINFO, linux_vsyscall); 234 AUXARGS_ENTRY(pos, LINUX_AT_HWCAP, cpu_feature); 235 236 /* 237 * Do not export AT_CLKTCK when emulating Linux kernel prior to 2.4.0, 238 * as it has appeared in the 2.4.0-rc7 first time. 239 * Being exported, AT_CLKTCK is returned by sysconf(_SC_CLK_TCK), 240 * glibc falls back to the hard-coded CLK_TCK value when aux entry 241 * is not present. 242 * Also see linux_times() implementation. 243 */ 244 if (linux_kernver(curthread) >= LINUX_KERNVER_2004000) 245 AUXARGS_ENTRY(pos, LINUX_AT_CLKTCK, stclohz); 246 AUXARGS_ENTRY(pos, AT_PHDR, args->phdr); 247 AUXARGS_ENTRY(pos, AT_PHENT, args->phent); 248 AUXARGS_ENTRY(pos, AT_PHNUM, args->phnum); 249 AUXARGS_ENTRY(pos, AT_PAGESZ, args->pagesz); 250 AUXARGS_ENTRY(pos, AT_FLAGS, args->flags); 251 AUXARGS_ENTRY(pos, AT_ENTRY, args->entry); 252 AUXARGS_ENTRY(pos, AT_BASE, args->base); 253 AUXARGS_ENTRY(pos, LINUX_AT_SECURE, issetugid); 254 AUXARGS_ENTRY(pos, AT_UID, imgp->proc->p_ucred->cr_ruid); 255 AUXARGS_ENTRY(pos, AT_EUID, imgp->proc->p_ucred->cr_svuid); 256 AUXARGS_ENTRY(pos, AT_GID, imgp->proc->p_ucred->cr_rgid); 257 AUXARGS_ENTRY(pos, AT_EGID, imgp->proc->p_ucred->cr_svgid); 258 AUXARGS_ENTRY(pos, LINUX_AT_PLATFORM, PTROUT(uplatform)); 259 AUXARGS_ENTRY(pos, LINUX_AT_RANDOM, imgp->canary); 260 if (imgp->execpathp != 0) 261 AUXARGS_ENTRY(pos, LINUX_AT_EXECFN, imgp->execpathp); 262 if (args->execfd != -1) 263 AUXARGS_ENTRY(pos, AT_EXECFD, args->execfd); 264 AUXARGS_ENTRY(pos, AT_NULL, 0); 265 266 free(imgp->auxargs, M_TEMP); 267 imgp->auxargs = NULL; 268 269 (*stack_base)--; 270 suword(*stack_base, (register_t)imgp->args->argc); 271 return (0); 272 } 273 274 /* 275 * Copied from kern/kern_exec.c 276 */ 277 static register_t * 278 linux_copyout_strings(struct image_params *imgp) 279 { 280 int argc, envc; 281 char **vectp; 282 char *stringp, *destp; 283 register_t *stack_base; 284 struct ps_strings *arginfo; 285 char canary[LINUX_AT_RANDOM_LEN]; 286 size_t execpath_len; 287 struct proc *p; 288 289 /* Calculate string base and vector table pointers. */ 290 p = imgp->proc; 291 if (imgp->execpath != NULL && imgp->auxargs != NULL) 292 execpath_len = strlen(imgp->execpath) + 1; 293 else 294 execpath_len = 0; 295 arginfo = (struct ps_strings *)p->p_sysent->sv_psstrings; 296 destp = (caddr_t)arginfo - SPARE_USRSPACE - linux_szplatform - 297 roundup(sizeof(canary), sizeof(char *)) - 298 roundup(execpath_len, sizeof(char *)) - 299 roundup(ARG_MAX - imgp->args->stringspace, sizeof(char *)); 300 301 /* Install LINUX_PLATFORM. */ 302 copyout(linux_kplatform, ((caddr_t)arginfo - linux_szplatform), 303 linux_szplatform); 304 305 if (execpath_len != 0) { 306 imgp->execpathp = (uintptr_t)arginfo - 307 linux_szplatform - execpath_len; 308 copyout(imgp->execpath, (void *)imgp->execpathp, execpath_len); 309 } 310 311 /* Prepare the canary for SSP. */ 312 arc4rand(canary, sizeof(canary), 0); 313 imgp->canary = (uintptr_t)arginfo - linux_szplatform - 314 roundup(execpath_len, sizeof(char *)) - 315 roundup(sizeof(canary), sizeof(char *)); 316 copyout(canary, (void *)imgp->canary, sizeof(canary)); 317 318 /* If we have a valid auxargs ptr, prepare some room on the stack. */ 319 if (imgp->auxargs) { 320 /* 321 * 'AT_COUNT*2' is size for the ELF Auxargs data. This is for 322 * lower compatibility. 323 */ 324 imgp->auxarg_size = (imgp->auxarg_size) ? imgp->auxarg_size : 325 (LINUX_AT_COUNT * 2); 326 /* 327 * The '+ 2' is for the null pointers at the end of each of 328 * the arg and env vector sets,and imgp->auxarg_size is room 329 * for argument of Runtime loader. 330 */ 331 vectp = (char **)(destp - (imgp->args->argc + 332 imgp->args->envc + 2 + imgp->auxarg_size) * sizeof(char *)); 333 } else { 334 /* 335 * The '+ 2' is for the null pointers at the end of each of 336 * the arg and env vector sets 337 */ 338 vectp = (char **)(destp - (imgp->args->argc + imgp->args->envc + 2) * 339 sizeof(char *)); 340 } 341 342 /* vectp also becomes our initial stack base. */ 343 stack_base = (register_t *)vectp; 344 345 stringp = imgp->args->begin_argv; 346 argc = imgp->args->argc; 347 envc = imgp->args->envc; 348 349 /* Copy out strings - arguments and environment. */ 350 copyout(stringp, destp, ARG_MAX - imgp->args->stringspace); 351 352 /* Fill in "ps_strings" struct for ps, w, etc. */ 353 suword(&arginfo->ps_argvstr, (long)(intptr_t)vectp); 354 suword(&arginfo->ps_nargvstr, argc); 355 356 /* Fill in argument portion of vector table. */ 357 for (; argc > 0; --argc) { 358 suword(vectp++, (long)(intptr_t)destp); 359 while (*stringp++ != 0) 360 destp++; 361 destp++; 362 } 363 364 /* A null vector table pointer separates the argp's from the envp's. */ 365 suword(vectp++, 0); 366 367 suword(&arginfo->ps_envstr, (long)(intptr_t)vectp); 368 suword(&arginfo->ps_nenvstr, envc); 369 370 /* Fill in environment portion of vector table. */ 371 for (; envc > 0; --envc) { 372 suword(vectp++, (long)(intptr_t)destp); 373 while (*stringp++ != 0) 374 destp++; 375 destp++; 376 } 377 378 /* The end of the vector table is a null pointer. */ 379 suword(vectp, 0); 380 381 return (stack_base); 382 } 383 384 static void 385 linux_rt_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) 386 { 387 struct thread *td = curthread; 388 struct proc *p = td->td_proc; 389 struct sigacts *psp; 390 struct trapframe *regs; 391 struct l_rt_sigframe *fp, frame; 392 int sig, code; 393 int oonstack; 394 395 sig = ksi->ksi_signo; 396 code = ksi->ksi_code; 397 PROC_LOCK_ASSERT(p, MA_OWNED); 398 psp = p->p_sigacts; 399 mtx_assert(&psp->ps_mtx, MA_OWNED); 400 regs = td->td_frame; 401 oonstack = sigonstack(regs->tf_esp); 402 403 #ifdef DEBUG 404 if (ldebug(rt_sendsig)) 405 printf(ARGS(rt_sendsig, "%p, %d, %p, %u"), 406 catcher, sig, (void*)mask, code); 407 #endif 408 /* Allocate space for the signal handler context. */ 409 if ((td->td_pflags & TDP_ALTSTACK) && !oonstack && 410 SIGISMEMBER(psp->ps_sigonstack, sig)) { 411 fp = (struct l_rt_sigframe *)((uintptr_t)td->td_sigstk.ss_sp + 412 td->td_sigstk.ss_size - sizeof(struct l_rt_sigframe)); 413 } else 414 fp = (struct l_rt_sigframe *)regs->tf_esp - 1; 415 mtx_unlock(&psp->ps_mtx); 416 417 /* Build the argument list for the signal handler. */ 418 sig = bsd_to_linux_signal(sig); 419 420 bzero(&frame, sizeof(frame)); 421 422 frame.sf_handler = catcher; 423 frame.sf_sig = sig; 424 frame.sf_siginfo = &fp->sf_si; 425 frame.sf_ucontext = &fp->sf_sc; 426 427 /* Fill in POSIX parts. */ 428 ksiginfo_to_lsiginfo(ksi, &frame.sf_si, sig); 429 430 /* Build the signal context to be used by sigreturn. */ 431 frame.sf_sc.uc_flags = 0; /* XXX ??? */ 432 frame.sf_sc.uc_link = NULL; /* XXX ??? */ 433 434 frame.sf_sc.uc_stack.ss_sp = td->td_sigstk.ss_sp; 435 frame.sf_sc.uc_stack.ss_size = td->td_sigstk.ss_size; 436 frame.sf_sc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) 437 ? ((oonstack) ? LINUX_SS_ONSTACK : 0) : LINUX_SS_DISABLE; 438 PROC_UNLOCK(p); 439 440 bsd_to_linux_sigset(mask, &frame.sf_sc.uc_sigmask); 441 442 frame.sf_sc.uc_mcontext.sc_mask = frame.sf_sc.uc_sigmask.__mask; 443 frame.sf_sc.uc_mcontext.sc_gs = rgs(); 444 frame.sf_sc.uc_mcontext.sc_fs = regs->tf_fs; 445 frame.sf_sc.uc_mcontext.sc_es = regs->tf_es; 446 frame.sf_sc.uc_mcontext.sc_ds = regs->tf_ds; 447 frame.sf_sc.uc_mcontext.sc_edi = regs->tf_edi; 448 frame.sf_sc.uc_mcontext.sc_esi = regs->tf_esi; 449 frame.sf_sc.uc_mcontext.sc_ebp = regs->tf_ebp; 450 frame.sf_sc.uc_mcontext.sc_ebx = regs->tf_ebx; 451 frame.sf_sc.uc_mcontext.sc_esp = regs->tf_esp; 452 frame.sf_sc.uc_mcontext.sc_edx = regs->tf_edx; 453 frame.sf_sc.uc_mcontext.sc_ecx = regs->tf_ecx; 454 frame.sf_sc.uc_mcontext.sc_eax = regs->tf_eax; 455 frame.sf_sc.uc_mcontext.sc_eip = regs->tf_eip; 456 frame.sf_sc.uc_mcontext.sc_cs = regs->tf_cs; 457 frame.sf_sc.uc_mcontext.sc_eflags = regs->tf_eflags; 458 frame.sf_sc.uc_mcontext.sc_esp_at_signal = regs->tf_esp; 459 frame.sf_sc.uc_mcontext.sc_ss = regs->tf_ss; 460 frame.sf_sc.uc_mcontext.sc_err = regs->tf_err; 461 frame.sf_sc.uc_mcontext.sc_cr2 = (register_t)ksi->ksi_addr; 462 frame.sf_sc.uc_mcontext.sc_trapno = bsd_to_linux_trapcode(code); 463 464 #ifdef DEBUG 465 if (ldebug(rt_sendsig)) 466 printf(LMSG("rt_sendsig flags: 0x%x, sp: %p, ss: 0x%x, mask: 0x%x"), 467 frame.sf_sc.uc_stack.ss_flags, td->td_sigstk.ss_sp, 468 td->td_sigstk.ss_size, frame.sf_sc.uc_mcontext.sc_mask); 469 #endif 470 471 if (copyout(&frame, fp, sizeof(frame)) != 0) { 472 /* 473 * Process has trashed its stack; give it an illegal 474 * instruction to halt it in its tracks. 475 */ 476 #ifdef DEBUG 477 if (ldebug(rt_sendsig)) 478 printf(LMSG("rt_sendsig: bad stack %p, oonstack=%x"), 479 fp, oonstack); 480 #endif 481 PROC_LOCK(p); 482 sigexit(td, SIGILL); 483 } 484 485 /* Build context to run handler in. */ 486 regs->tf_esp = (int)fp; 487 regs->tf_eip = linux_rt_sigcode; 488 regs->tf_eflags &= ~(PSL_T | PSL_VM | PSL_D); 489 regs->tf_cs = _ucodesel; 490 regs->tf_ds = _udatasel; 491 regs->tf_es = _udatasel; 492 regs->tf_fs = _udatasel; 493 regs->tf_ss = _udatasel; 494 PROC_LOCK(p); 495 mtx_lock(&psp->ps_mtx); 496 } 497 498 499 /* 500 * Send an interrupt to process. 501 * 502 * Stack is set up to allow sigcode stored 503 * in u. to call routine, followed by kcall 504 * to sigreturn routine below. After sigreturn 505 * resets the signal mask, the stack, and the 506 * frame pointer, it returns to the user 507 * specified pc, psl. 508 */ 509 static void 510 linux_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) 511 { 512 struct thread *td = curthread; 513 struct proc *p = td->td_proc; 514 struct sigacts *psp; 515 struct trapframe *regs; 516 struct l_sigframe *fp, frame; 517 l_sigset_t lmask; 518 int sig, code; 519 int oonstack; 520 521 PROC_LOCK_ASSERT(p, MA_OWNED); 522 psp = p->p_sigacts; 523 sig = ksi->ksi_signo; 524 code = ksi->ksi_code; 525 mtx_assert(&psp->ps_mtx, MA_OWNED); 526 if (SIGISMEMBER(psp->ps_siginfo, sig)) { 527 /* Signal handler installed with SA_SIGINFO. */ 528 linux_rt_sendsig(catcher, ksi, mask); 529 return; 530 } 531 regs = td->td_frame; 532 oonstack = sigonstack(regs->tf_esp); 533 534 #ifdef DEBUG 535 if (ldebug(sendsig)) 536 printf(ARGS(sendsig, "%p, %d, %p, %u"), 537 catcher, sig, (void*)mask, code); 538 #endif 539 540 /* Allocate space for the signal handler context. */ 541 if ((td->td_pflags & TDP_ALTSTACK) && !oonstack && 542 SIGISMEMBER(psp->ps_sigonstack, sig)) { 543 fp = (struct l_sigframe *)((uintptr_t)td->td_sigstk.ss_sp + 544 td->td_sigstk.ss_size - sizeof(struct l_sigframe)); 545 } else 546 fp = (struct l_sigframe *)regs->tf_esp - 1; 547 mtx_unlock(&psp->ps_mtx); 548 PROC_UNLOCK(p); 549 550 /* Build the argument list for the signal handler. */ 551 sig = bsd_to_linux_signal(sig); 552 553 bzero(&frame, sizeof(frame)); 554 555 frame.sf_handler = catcher; 556 frame.sf_sig = sig; 557 558 bsd_to_linux_sigset(mask, &lmask); 559 560 /* Build the signal context to be used by sigreturn. */ 561 frame.sf_sc.sc_mask = lmask.__mask; 562 frame.sf_sc.sc_gs = rgs(); 563 frame.sf_sc.sc_fs = regs->tf_fs; 564 frame.sf_sc.sc_es = regs->tf_es; 565 frame.sf_sc.sc_ds = regs->tf_ds; 566 frame.sf_sc.sc_edi = regs->tf_edi; 567 frame.sf_sc.sc_esi = regs->tf_esi; 568 frame.sf_sc.sc_ebp = regs->tf_ebp; 569 frame.sf_sc.sc_ebx = regs->tf_ebx; 570 frame.sf_sc.sc_esp = regs->tf_esp; 571 frame.sf_sc.sc_edx = regs->tf_edx; 572 frame.sf_sc.sc_ecx = regs->tf_ecx; 573 frame.sf_sc.sc_eax = regs->tf_eax; 574 frame.sf_sc.sc_eip = regs->tf_eip; 575 frame.sf_sc.sc_cs = regs->tf_cs; 576 frame.sf_sc.sc_eflags = regs->tf_eflags; 577 frame.sf_sc.sc_esp_at_signal = regs->tf_esp; 578 frame.sf_sc.sc_ss = regs->tf_ss; 579 frame.sf_sc.sc_err = regs->tf_err; 580 frame.sf_sc.sc_cr2 = (register_t)ksi->ksi_addr; 581 frame.sf_sc.sc_trapno = bsd_to_linux_trapcode(ksi->ksi_trapno); 582 583 frame.sf_extramask[0] = lmask.__mask; 584 585 if (copyout(&frame, fp, sizeof(frame)) != 0) { 586 /* 587 * Process has trashed its stack; give it an illegal 588 * instruction to halt it in its tracks. 589 */ 590 PROC_LOCK(p); 591 sigexit(td, SIGILL); 592 } 593 594 /* Build context to run handler in. */ 595 regs->tf_esp = (int)fp; 596 regs->tf_eip = linux_sigcode; 597 regs->tf_eflags &= ~(PSL_T | PSL_VM | PSL_D); 598 regs->tf_cs = _ucodesel; 599 regs->tf_ds = _udatasel; 600 regs->tf_es = _udatasel; 601 regs->tf_fs = _udatasel; 602 regs->tf_ss = _udatasel; 603 PROC_LOCK(p); 604 mtx_lock(&psp->ps_mtx); 605 } 606 607 /* 608 * System call to cleanup state after a signal 609 * has been taken. Reset signal mask and 610 * stack state from context left by sendsig (above). 611 * Return to previous pc and psl as specified by 612 * context left by sendsig. Check carefully to 613 * make sure that the user has not modified the 614 * psl to gain improper privileges or to cause 615 * a machine fault. 616 */ 617 int 618 linux_sigreturn(struct thread *td, struct linux_sigreturn_args *args) 619 { 620 struct l_sigframe frame; 621 struct trapframe *regs; 622 l_sigset_t lmask; 623 sigset_t bmask; 624 int eflags; 625 ksiginfo_t ksi; 626 627 regs = td->td_frame; 628 629 #ifdef DEBUG 630 if (ldebug(sigreturn)) 631 printf(ARGS(sigreturn, "%p"), (void *)args->sfp); 632 #endif 633 /* 634 * The trampoline code hands us the sigframe. 635 * It is unsafe to keep track of it ourselves, in the event that a 636 * program jumps out of a signal handler. 637 */ 638 if (copyin(args->sfp, &frame, sizeof(frame)) != 0) 639 return (EFAULT); 640 641 /* Check for security violations. */ 642 #define EFLAGS_SECURE(ef, oef) ((((ef) ^ (oef)) & ~PSL_USERCHANGE) == 0) 643 eflags = frame.sf_sc.sc_eflags; 644 if (!EFLAGS_SECURE(eflags, regs->tf_eflags)) 645 return (EINVAL); 646 647 /* 648 * Don't allow users to load a valid privileged %cs. Let the 649 * hardware check for invalid selectors, excess privilege in 650 * other selectors, invalid %eip's and invalid %esp's. 651 */ 652 #define CS_SECURE(cs) (ISPL(cs) == SEL_UPL) 653 if (!CS_SECURE(frame.sf_sc.sc_cs)) { 654 ksiginfo_init_trap(&ksi); 655 ksi.ksi_signo = SIGBUS; 656 ksi.ksi_code = BUS_OBJERR; 657 ksi.ksi_trapno = T_PROTFLT; 658 ksi.ksi_addr = (void *)regs->tf_eip; 659 trapsignal(td, &ksi); 660 return (EINVAL); 661 } 662 663 lmask.__mask = frame.sf_sc.sc_mask; 664 linux_to_bsd_sigset(&lmask, &bmask); 665 kern_sigprocmask(td, SIG_SETMASK, &bmask, NULL, 0); 666 667 /* Restore signal context. */ 668 /* %gs was restored by the trampoline. */ 669 regs->tf_fs = frame.sf_sc.sc_fs; 670 regs->tf_es = frame.sf_sc.sc_es; 671 regs->tf_ds = frame.sf_sc.sc_ds; 672 regs->tf_edi = frame.sf_sc.sc_edi; 673 regs->tf_esi = frame.sf_sc.sc_esi; 674 regs->tf_ebp = frame.sf_sc.sc_ebp; 675 regs->tf_ebx = frame.sf_sc.sc_ebx; 676 regs->tf_edx = frame.sf_sc.sc_edx; 677 regs->tf_ecx = frame.sf_sc.sc_ecx; 678 regs->tf_eax = frame.sf_sc.sc_eax; 679 regs->tf_eip = frame.sf_sc.sc_eip; 680 regs->tf_cs = frame.sf_sc.sc_cs; 681 regs->tf_eflags = eflags; 682 regs->tf_esp = frame.sf_sc.sc_esp_at_signal; 683 regs->tf_ss = frame.sf_sc.sc_ss; 684 685 return (EJUSTRETURN); 686 } 687 688 /* 689 * System call to cleanup state after a signal 690 * has been taken. Reset signal mask and 691 * stack state from context left by rt_sendsig (above). 692 * Return to previous pc and psl as specified by 693 * context left by sendsig. Check carefully to 694 * make sure that the user has not modified the 695 * psl to gain improper privileges or to cause 696 * a machine fault. 697 */ 698 int 699 linux_rt_sigreturn(struct thread *td, struct linux_rt_sigreturn_args *args) 700 { 701 struct l_ucontext uc; 702 struct l_sigcontext *context; 703 sigset_t bmask; 704 l_stack_t *lss; 705 stack_t ss; 706 struct trapframe *regs; 707 int eflags; 708 ksiginfo_t ksi; 709 710 regs = td->td_frame; 711 712 #ifdef DEBUG 713 if (ldebug(rt_sigreturn)) 714 printf(ARGS(rt_sigreturn, "%p"), (void *)args->ucp); 715 #endif 716 /* 717 * The trampoline code hands us the ucontext. 718 * It is unsafe to keep track of it ourselves, in the event that a 719 * program jumps out of a signal handler. 720 */ 721 if (copyin(args->ucp, &uc, sizeof(uc)) != 0) 722 return (EFAULT); 723 724 context = &uc.uc_mcontext; 725 726 /* Check for security violations. */ 727 #define EFLAGS_SECURE(ef, oef) ((((ef) ^ (oef)) & ~PSL_USERCHANGE) == 0) 728 eflags = context->sc_eflags; 729 if (!EFLAGS_SECURE(eflags, regs->tf_eflags)) 730 return (EINVAL); 731 732 /* 733 * Don't allow users to load a valid privileged %cs. Let the 734 * hardware check for invalid selectors, excess privilege in 735 * other selectors, invalid %eip's and invalid %esp's. 736 */ 737 #define CS_SECURE(cs) (ISPL(cs) == SEL_UPL) 738 if (!CS_SECURE(context->sc_cs)) { 739 ksiginfo_init_trap(&ksi); 740 ksi.ksi_signo = SIGBUS; 741 ksi.ksi_code = BUS_OBJERR; 742 ksi.ksi_trapno = T_PROTFLT; 743 ksi.ksi_addr = (void *)regs->tf_eip; 744 trapsignal(td, &ksi); 745 return (EINVAL); 746 } 747 748 linux_to_bsd_sigset(&uc.uc_sigmask, &bmask); 749 kern_sigprocmask(td, SIG_SETMASK, &bmask, NULL, 0); 750 751 /* Restore signal context. */ 752 /* %gs was restored by the trampoline. */ 753 regs->tf_fs = context->sc_fs; 754 regs->tf_es = context->sc_es; 755 regs->tf_ds = context->sc_ds; 756 regs->tf_edi = context->sc_edi; 757 regs->tf_esi = context->sc_esi; 758 regs->tf_ebp = context->sc_ebp; 759 regs->tf_ebx = context->sc_ebx; 760 regs->tf_edx = context->sc_edx; 761 regs->tf_ecx = context->sc_ecx; 762 regs->tf_eax = context->sc_eax; 763 regs->tf_eip = context->sc_eip; 764 regs->tf_cs = context->sc_cs; 765 regs->tf_eflags = eflags; 766 regs->tf_esp = context->sc_esp_at_signal; 767 regs->tf_ss = context->sc_ss; 768 769 /* Call sigaltstack & ignore results. */ 770 lss = &uc.uc_stack; 771 ss.ss_sp = lss->ss_sp; 772 ss.ss_size = lss->ss_size; 773 ss.ss_flags = linux_to_bsd_sigaltstack(lss->ss_flags); 774 775 #ifdef DEBUG 776 if (ldebug(rt_sigreturn)) 777 printf(LMSG("rt_sigret flags: 0x%x, sp: %p, ss: 0x%x, mask: 0x%x"), 778 ss.ss_flags, ss.ss_sp, ss.ss_size, context->sc_mask); 779 #endif 780 (void)kern_sigaltstack(td, &ss, NULL); 781 782 return (EJUSTRETURN); 783 } 784 785 static int 786 linux_fetch_syscall_args(struct thread *td) 787 { 788 struct proc *p; 789 struct trapframe *frame; 790 struct syscall_args *sa; 791 792 p = td->td_proc; 793 frame = td->td_frame; 794 sa = &td->td_sa; 795 796 sa->code = frame->tf_eax; 797 sa->args[0] = frame->tf_ebx; 798 sa->args[1] = frame->tf_ecx; 799 sa->args[2] = frame->tf_edx; 800 sa->args[3] = frame->tf_esi; 801 sa->args[4] = frame->tf_edi; 802 sa->args[5] = frame->tf_ebp; /* Unconfirmed */ 803 804 if (sa->code >= p->p_sysent->sv_size) 805 /* nosys */ 806 sa->callp = &p->p_sysent->sv_table[p->p_sysent->sv_size - 1]; 807 else 808 sa->callp = &p->p_sysent->sv_table[sa->code]; 809 sa->narg = sa->callp->sy_narg; 810 811 td->td_retval[0] = 0; 812 td->td_retval[1] = frame->tf_edx; 813 814 return (0); 815 } 816 817 /* 818 * If a Linux binary is exec'ing something, try this image activator 819 * first. We override standard shell script execution in order to 820 * be able to modify the interpreter path. We only do this if a Linux 821 * binary is doing the exec, so we do not create an EXEC module for it. 822 */ 823 static int 824 linux_exec_imgact_try(struct image_params *imgp) 825 { 826 const char *head = (const char *)imgp->image_header; 827 char *rpath; 828 int error = -1; 829 830 /* 831 * The interpreter for shell scripts run from a Linux binary needs 832 * to be located in /compat/linux if possible in order to recursively 833 * maintain Linux path emulation. 834 */ 835 if (((const short *)head)[0] == SHELLMAGIC) { 836 /* 837 * Run our normal shell image activator. If it succeeds then 838 * attempt to use the alternate path for the interpreter. If 839 * an alternate path is found, use our stringspace to store it. 840 */ 841 if ((error = exec_shell_imgact(imgp)) == 0) { 842 linux_emul_convpath(FIRST_THREAD_IN_PROC(imgp->proc), 843 imgp->interpreter_name, UIO_SYSSPACE, &rpath, 0, 844 AT_FDCWD); 845 if (rpath != NULL) 846 imgp->args->fname_buf = 847 imgp->interpreter_name = rpath; 848 } 849 } 850 return (error); 851 } 852 853 /* 854 * exec_setregs may initialize some registers differently than Linux 855 * does, thus potentially confusing Linux binaries. If necessary, we 856 * override the exec_setregs default(s) here. 857 */ 858 static void 859 linux_exec_setregs(struct thread *td, struct image_params *imgp, u_long stack) 860 { 861 struct pcb *pcb = td->td_pcb; 862 863 exec_setregs(td, imgp, stack); 864 865 /* Linux sets %gs to 0, we default to _udatasel. */ 866 pcb->pcb_gs = 0; 867 load_gs(0); 868 869 pcb->pcb_initial_npxcw = __LINUX_NPXCW__; 870 } 871 872 static void 873 linux_get_machine(const char **dst) 874 { 875 876 switch (cpu_class) { 877 case CPUCLASS_686: 878 *dst = "i686"; 879 break; 880 case CPUCLASS_586: 881 *dst = "i586"; 882 break; 883 case CPUCLASS_486: 884 *dst = "i486"; 885 break; 886 default: 887 *dst = "i386"; 888 } 889 } 890 891 struct sysentvec linux_sysvec = { 892 .sv_size = LINUX_SYS_MAXSYSCALL, 893 .sv_table = linux_sysent, 894 .sv_mask = 0, 895 .sv_errsize = ELAST + 1, 896 .sv_errtbl = linux_errtbl, 897 .sv_transtrap = linux_translate_traps, 898 .sv_fixup = linux_fixup, 899 .sv_sendsig = linux_sendsig, 900 .sv_sigcode = &_binary_linux_locore_o_start, 901 .sv_szsigcode = &linux_szsigcode, 902 .sv_name = "Linux a.out", 903 .sv_coredump = NULL, 904 .sv_imgact_try = linux_exec_imgact_try, 905 .sv_minsigstksz = LINUX_MINSIGSTKSZ, 906 .sv_pagesize = PAGE_SIZE, 907 .sv_minuser = VM_MIN_ADDRESS, 908 .sv_maxuser = VM_MAXUSER_ADDRESS, 909 .sv_usrstack = LINUX_USRSTACK, 910 .sv_psstrings = PS_STRINGS, 911 .sv_stackprot = VM_PROT_ALL, 912 .sv_copyout_strings = exec_copyout_strings, 913 .sv_setregs = linux_exec_setregs, 914 .sv_fixlimit = NULL, 915 .sv_maxssiz = NULL, 916 .sv_flags = SV_ABI_LINUX | SV_AOUT | SV_IA32 | SV_ILP32, 917 .sv_set_syscall_retval = cpu_set_syscall_retval, 918 .sv_fetch_syscall_args = linux_fetch_syscall_args, 919 .sv_syscallnames = NULL, 920 .sv_shared_page_base = LINUX_SHAREDPAGE, 921 .sv_shared_page_len = PAGE_SIZE, 922 .sv_schedtail = linux_schedtail, 923 .sv_thread_detach = linux_thread_detach, 924 .sv_trap = NULL, 925 }; 926 INIT_SYSENTVEC(aout_sysvec, &linux_sysvec); 927 928 struct sysentvec elf_linux_sysvec = { 929 .sv_size = LINUX_SYS_MAXSYSCALL, 930 .sv_table = linux_sysent, 931 .sv_mask = 0, 932 .sv_errsize = ELAST + 1, 933 .sv_errtbl = linux_errtbl, 934 .sv_transtrap = linux_translate_traps, 935 .sv_fixup = linux_fixup_elf, 936 .sv_sendsig = linux_sendsig, 937 .sv_sigcode = &_binary_linux_locore_o_start, 938 .sv_szsigcode = &linux_szsigcode, 939 .sv_name = "Linux ELF", 940 .sv_coredump = elf32_coredump, 941 .sv_imgact_try = linux_exec_imgact_try, 942 .sv_minsigstksz = LINUX_MINSIGSTKSZ, 943 .sv_pagesize = PAGE_SIZE, 944 .sv_minuser = VM_MIN_ADDRESS, 945 .sv_maxuser = VM_MAXUSER_ADDRESS, 946 .sv_usrstack = LINUX_USRSTACK, 947 .sv_psstrings = LINUX_PS_STRINGS, 948 .sv_stackprot = VM_PROT_ALL, 949 .sv_copyout_strings = linux_copyout_strings, 950 .sv_setregs = linux_exec_setregs, 951 .sv_fixlimit = NULL, 952 .sv_maxssiz = NULL, 953 .sv_flags = SV_ABI_LINUX | SV_IA32 | SV_ILP32 | SV_SHP, 954 .sv_set_syscall_retval = cpu_set_syscall_retval, 955 .sv_fetch_syscall_args = linux_fetch_syscall_args, 956 .sv_syscallnames = NULL, 957 .sv_shared_page_base = LINUX_SHAREDPAGE, 958 .sv_shared_page_len = PAGE_SIZE, 959 .sv_schedtail = linux_schedtail, 960 .sv_thread_detach = linux_thread_detach, 961 .sv_trap = NULL, 962 }; 963 964 static void 965 linux_vdso_install(void *param) 966 { 967 968 linux_szsigcode = (&_binary_linux_locore_o_end - 969 &_binary_linux_locore_o_start); 970 971 if (linux_szsigcode > elf_linux_sysvec.sv_shared_page_len) 972 panic("Linux invalid vdso size\n"); 973 974 __elfN(linux_vdso_fixup)(&elf_linux_sysvec); 975 976 linux_shared_page_obj = __elfN(linux_shared_page_init) 977 (&linux_shared_page_mapping); 978 979 __elfN(linux_vdso_reloc)(&elf_linux_sysvec); 980 981 bcopy(elf_linux_sysvec.sv_sigcode, linux_shared_page_mapping, 982 linux_szsigcode); 983 elf_linux_sysvec.sv_shared_page_obj = linux_shared_page_obj; 984 } 985 SYSINIT(elf_linux_vdso_init, SI_SUB_EXEC, SI_ORDER_ANY, 986 linux_vdso_install, NULL); 987 988 static void 989 linux_vdso_deinstall(void *param) 990 { 991 992 __elfN(linux_shared_page_fini)(linux_shared_page_obj); 993 } 994 SYSUNINIT(elf_linux_vdso_uninit, SI_SUB_EXEC, SI_ORDER_FIRST, 995 linux_vdso_deinstall, NULL); 996 997 static char GNU_ABI_VENDOR[] = "GNU"; 998 static int GNULINUX_ABI_DESC = 0; 999 1000 static bool 1001 linux_trans_osrel(const Elf_Note *note, int32_t *osrel) 1002 { 1003 const Elf32_Word *desc; 1004 uintptr_t p; 1005 1006 p = (uintptr_t)(note + 1); 1007 p += roundup2(note->n_namesz, sizeof(Elf32_Addr)); 1008 1009 desc = (const Elf32_Word *)p; 1010 if (desc[0] != GNULINUX_ABI_DESC) 1011 return (false); 1012 1013 /* 1014 * For Linux we encode osrel as follows (see linux_mib.c): 1015 * VVVMMMIII (version, major, minor), see linux_mib.c. 1016 */ 1017 *osrel = desc[1] * 1000000 + desc[2] * 1000 + desc[3]; 1018 1019 return (true); 1020 } 1021 1022 static Elf_Brandnote linux_brandnote = { 1023 .hdr.n_namesz = sizeof(GNU_ABI_VENDOR), 1024 .hdr.n_descsz = 16, /* XXX at least 16 */ 1025 .hdr.n_type = 1, 1026 .vendor = GNU_ABI_VENDOR, 1027 .flags = BN_TRANSLATE_OSREL, 1028 .trans_osrel = linux_trans_osrel 1029 }; 1030 1031 static Elf32_Brandinfo linux_brand = { 1032 .brand = ELFOSABI_LINUX, 1033 .machine = EM_386, 1034 .compat_3_brand = "Linux", 1035 .emul_path = "/compat/linux", 1036 .interp_path = "/lib/ld-linux.so.1", 1037 .sysvec = &elf_linux_sysvec, 1038 .interp_newpath = NULL, 1039 .brand_note = &linux_brandnote, 1040 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 1041 }; 1042 1043 static Elf32_Brandinfo linux_glibc2brand = { 1044 .brand = ELFOSABI_LINUX, 1045 .machine = EM_386, 1046 .compat_3_brand = "Linux", 1047 .emul_path = "/compat/linux", 1048 .interp_path = "/lib/ld-linux.so.2", 1049 .sysvec = &elf_linux_sysvec, 1050 .interp_newpath = NULL, 1051 .brand_note = &linux_brandnote, 1052 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 1053 }; 1054 1055 static Elf32_Brandinfo linux_muslbrand = { 1056 .brand = ELFOSABI_LINUX, 1057 .machine = EM_386, 1058 .compat_3_brand = "Linux", 1059 .emul_path = "/compat/linux", 1060 .interp_path = "/lib/ld-musl-i386.so.1", 1061 .sysvec = &elf_linux_sysvec, 1062 .interp_newpath = NULL, 1063 .brand_note = &linux_brandnote, 1064 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 1065 }; 1066 1067 Elf32_Brandinfo *linux_brandlist[] = { 1068 &linux_brand, 1069 &linux_glibc2brand, 1070 &linux_muslbrand, 1071 NULL 1072 }; 1073 1074 static int 1075 linux_elf_modevent(module_t mod, int type, void *data) 1076 { 1077 Elf32_Brandinfo **brandinfo; 1078 int error; 1079 struct linux_ioctl_handler **lihp; 1080 1081 error = 0; 1082 1083 switch(type) { 1084 case MOD_LOAD: 1085 for (brandinfo = &linux_brandlist[0]; *brandinfo != NULL; 1086 ++brandinfo) 1087 if (elf32_insert_brand_entry(*brandinfo) < 0) 1088 error = EINVAL; 1089 if (error == 0) { 1090 SET_FOREACH(lihp, linux_ioctl_handler_set) 1091 linux_ioctl_register_handler(*lihp); 1092 LIST_INIT(&futex_list); 1093 mtx_init(&futex_mtx, "ftllk", NULL, MTX_DEF); 1094 linux_exit_tag = EVENTHANDLER_REGISTER(process_exit, linux_proc_exit, 1095 NULL, 1000); 1096 linux_exec_tag = EVENTHANDLER_REGISTER(process_exec, linux_proc_exec, 1097 NULL, 1000); 1098 linux_thread_dtor_tag = EVENTHANDLER_REGISTER(thread_dtor, 1099 linux_thread_dtor, NULL, EVENTHANDLER_PRI_ANY); 1100 linux_get_machine(&linux_kplatform); 1101 linux_szplatform = roundup(strlen(linux_kplatform) + 1, 1102 sizeof(char *)); 1103 linux_osd_jail_register(); 1104 stclohz = (stathz ? stathz : hz); 1105 if (bootverbose) 1106 printf("Linux ELF exec handler installed\n"); 1107 } else 1108 printf("cannot insert Linux ELF brand handler\n"); 1109 break; 1110 case MOD_UNLOAD: 1111 for (brandinfo = &linux_brandlist[0]; *brandinfo != NULL; 1112 ++brandinfo) 1113 if (elf32_brand_inuse(*brandinfo)) 1114 error = EBUSY; 1115 if (error == 0) { 1116 for (brandinfo = &linux_brandlist[0]; 1117 *brandinfo != NULL; ++brandinfo) 1118 if (elf32_remove_brand_entry(*brandinfo) < 0) 1119 error = EINVAL; 1120 } 1121 if (error == 0) { 1122 SET_FOREACH(lihp, linux_ioctl_handler_set) 1123 linux_ioctl_unregister_handler(*lihp); 1124 mtx_destroy(&futex_mtx); 1125 EVENTHANDLER_DEREGISTER(process_exit, linux_exit_tag); 1126 EVENTHANDLER_DEREGISTER(process_exec, linux_exec_tag); 1127 EVENTHANDLER_DEREGISTER(thread_dtor, linux_thread_dtor_tag); 1128 linux_osd_jail_deregister(); 1129 if (bootverbose) 1130 printf("Linux ELF exec handler removed\n"); 1131 } else 1132 printf("Could not deinstall ELF interpreter entry\n"); 1133 break; 1134 default: 1135 return (EOPNOTSUPP); 1136 } 1137 return (error); 1138 } 1139 1140 static moduledata_t linux_elf_mod = { 1141 "linuxelf", 1142 linux_elf_modevent, 1143 0 1144 }; 1145 1146 DECLARE_MODULE_TIED(linuxelf, linux_elf_mod, SI_SUB_EXEC, SI_ORDER_ANY); 1147 FEATURE(linux, "Linux 32bit support"); 1148