1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2004 Tim J. Robbins 5 * Copyright (c) 2003 Peter Wemm 6 * Copyright (c) 2002 Doug Rabson 7 * Copyright (c) 1998-1999 Andrew Gallatin 8 * Copyright (c) 1994-1996 Søren Schmidt 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer 16 * in this position and unchanged. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include "opt_compat.h" 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #ifndef COMPAT_FREEBSD32 41 #error "Unable to compile Linux-emulator due to missing COMPAT_FREEBSD32 option!" 42 #endif 43 44 #define __ELF_WORD_SIZE 32 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/exec.h> 49 #include <sys/fcntl.h> 50 #include <sys/imgact.h> 51 #include <sys/imgact_elf.h> 52 #include <sys/kernel.h> 53 #include <sys/lock.h> 54 #include <sys/malloc.h> 55 #include <sys/module.h> 56 #include <sys/mutex.h> 57 #include <sys/proc.h> 58 #include <sys/resourcevar.h> 59 #include <sys/stddef.h> 60 #include <sys/signalvar.h> 61 #include <sys/syscallsubr.h> 62 #include <sys/sysctl.h> 63 #include <sys/sysent.h> 64 #include <sys/sysproto.h> 65 #include <sys/vnode.h> 66 #include <sys/eventhandler.h> 67 68 #include <vm/vm.h> 69 #include <vm/pmap.h> 70 #include <vm/vm_extern.h> 71 #include <vm/vm_map.h> 72 #include <vm/vm_object.h> 73 #include <vm/vm_page.h> 74 #include <vm/vm_param.h> 75 76 #include <machine/cpu.h> 77 #include <machine/md_var.h> 78 #include <machine/pcb.h> 79 #include <machine/specialreg.h> 80 #include <machine/trap.h> 81 82 #include <x86/linux/linux_x86.h> 83 #include <amd64/linux32/linux.h> 84 #include <amd64/linux32/linux32_proto.h> 85 #include <compat/linux/linux_elf.h> 86 #include <compat/linux/linux_emul.h> 87 #include <compat/linux/linux_fork.h> 88 #include <compat/linux/linux_ioctl.h> 89 #include <compat/linux/linux_mib.h> 90 #include <compat/linux/linux_misc.h> 91 #include <compat/linux/linux_signal.h> 92 #include <compat/linux/linux_util.h> 93 #include <compat/linux/linux_vdso.h> 94 95 #include <x86/linux/linux_x86_sigframe.h> 96 97 MODULE_VERSION(linux, 1); 98 99 #define LINUX32_MAXUSER ((1ul << 32) - PAGE_SIZE) 100 #define LINUX32_VDSOPAGE_SIZE PAGE_SIZE * 2 101 #define LINUX32_VDSOPAGE (LINUX32_MAXUSER - LINUX32_VDSOPAGE_SIZE) 102 #define LINUX32_SHAREDPAGE (LINUX32_VDSOPAGE - PAGE_SIZE) 103 /* 104 * PAGE_SIZE - the size 105 * of the native SHAREDPAGE 106 */ 107 #define LINUX32_USRSTACK LINUX32_SHAREDPAGE 108 109 static int linux_szsigcode; 110 static vm_object_t linux_vdso_obj; 111 static char *linux_vdso_mapping; 112 extern char _binary_linux32_vdso_so_o_start; 113 extern char _binary_linux32_vdso_so_o_end; 114 static vm_offset_t linux_vdso_base; 115 116 extern struct sysent linux32_sysent[LINUX32_SYS_MAXSYSCALL]; 117 extern const char *linux32_syscallnames[]; 118 119 SET_DECLARE(linux_ioctl_handler_set, struct linux_ioctl_handler); 120 121 static int linux_copyout_strings(struct image_params *imgp, 122 uintptr_t *stack_base); 123 static void linux_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask); 124 static void linux_exec_setregs(struct thread *td, 125 struct image_params *imgp, uintptr_t stack); 126 static void linux_exec_sysvec_init(void *param); 127 static int linux_on_exec_vmspace(struct proc *p, 128 struct image_params *imgp); 129 static void linux32_fixlimit(struct rlimit *rl, int which); 130 static void linux_vdso_install(const void *param); 131 static void linux_vdso_deinstall(const void *param); 132 static void linux_vdso_reloc(char *mapping, Elf_Addr offset); 133 static void linux32_set_fork_retval(struct thread *td); 134 static void linux32_set_syscall_retval(struct thread *td, int error); 135 136 struct linux32_ps_strings { 137 u_int32_t ps_argvstr; /* first of 0 or more argument strings */ 138 u_int ps_nargvstr; /* the number of argument strings */ 139 u_int32_t ps_envstr; /* first of 0 or more environment strings */ 140 u_int ps_nenvstr; /* the number of environment strings */ 141 }; 142 #define LINUX32_PS_STRINGS (LINUX32_USRSTACK - \ 143 sizeof(struct linux32_ps_strings)) 144 145 LINUX_VDSO_SYM_INTPTR(__kernel_vsyscall); 146 LINUX_VDSO_SYM_INTPTR(linux32_vdso_sigcode); 147 LINUX_VDSO_SYM_INTPTR(linux32_vdso_rt_sigcode); 148 LINUX_VDSO_SYM_INTPTR(kern_timekeep_base); 149 LINUX_VDSO_SYM_INTPTR(kern_tsc_selector); 150 LINUX_VDSO_SYM_INTPTR(kern_cpu_selector); 151 LINUX_VDSO_SYM_CHAR(linux_platform); 152 153 static int 154 linux_copyout_auxargs(struct image_params *imgp, uintptr_t base) 155 { 156 Elf32_Auxargs *args; 157 Elf32_Auxinfo *argarray, *pos; 158 int error, issetugid; 159 160 args = (Elf32_Auxargs *)imgp->auxargs; 161 argarray = pos = malloc(LINUX_AT_COUNT * sizeof(*pos), M_TEMP, 162 M_WAITOK | M_ZERO); 163 164 issetugid = imgp->proc->p_flag & P_SUGID ? 1 : 0; 165 AUXARGS_ENTRY(pos, LINUX_AT_SYSINFO, __kernel_vsyscall); 166 AUXARGS_ENTRY(pos, LINUX_AT_SYSINFO_EHDR, linux_vdso_base); 167 AUXARGS_ENTRY(pos, LINUX_AT_HWCAP, cpu_feature); 168 AUXARGS_ENTRY(pos, AT_PAGESZ, args->pagesz); 169 170 /* 171 * Do not export AT_CLKTCK when emulating Linux kernel prior to 2.4.0, 172 * as it has appeared in the 2.4.0-rc7 first time. 173 * Being exported, AT_CLKTCK is returned by sysconf(_SC_CLK_TCK), 174 * glibc falls back to the hard-coded CLK_TCK value when aux entry 175 * is not present. 176 * Also see linux_times() implementation. 177 */ 178 if (linux_kernver(curthread) >= LINUX_KERNVER_2004000) 179 AUXARGS_ENTRY(pos, LINUX_AT_CLKTCK, stclohz); 180 AUXARGS_ENTRY(pos, AT_PHDR, args->phdr); 181 AUXARGS_ENTRY(pos, AT_PHENT, args->phent); 182 AUXARGS_ENTRY(pos, AT_PHNUM, args->phnum); 183 AUXARGS_ENTRY(pos, AT_BASE, args->base); 184 AUXARGS_ENTRY(pos, AT_FLAGS, args->flags); 185 AUXARGS_ENTRY(pos, AT_ENTRY, args->entry); 186 AUXARGS_ENTRY(pos, AT_UID, imgp->proc->p_ucred->cr_ruid); 187 AUXARGS_ENTRY(pos, AT_EUID, imgp->proc->p_ucred->cr_svuid); 188 AUXARGS_ENTRY(pos, AT_GID, imgp->proc->p_ucred->cr_rgid); 189 AUXARGS_ENTRY(pos, AT_EGID, imgp->proc->p_ucred->cr_svgid); 190 AUXARGS_ENTRY(pos, LINUX_AT_SECURE, issetugid); 191 AUXARGS_ENTRY(pos, LINUX_AT_RANDOM, PTROUT(imgp->canary)); 192 AUXARGS_ENTRY(pos, LINUX_AT_HWCAP2, 0); 193 if (imgp->execpathp != 0) 194 AUXARGS_ENTRY(pos, LINUX_AT_EXECFN, PTROUT(imgp->execpathp)); 195 if (args->execfd != -1) 196 AUXARGS_ENTRY(pos, AT_EXECFD, args->execfd); 197 AUXARGS_ENTRY(pos, LINUX_AT_PLATFORM, PTROUT(linux_platform)); 198 AUXARGS_ENTRY(pos, AT_NULL, 0); 199 200 free(imgp->auxargs, M_TEMP); 201 imgp->auxargs = NULL; 202 KASSERT(pos - argarray <= LINUX_AT_COUNT, ("Too many auxargs")); 203 204 error = copyout(argarray, (void *)base, 205 sizeof(*argarray) * LINUX_AT_COUNT); 206 free(argarray, M_TEMP); 207 return (error); 208 } 209 210 static void 211 linux_rt_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) 212 { 213 struct thread *td = curthread; 214 struct proc *p = td->td_proc; 215 struct sigacts *psp; 216 struct trapframe *regs; 217 struct l_rt_sigframe *fp, frame; 218 int oonstack; 219 int sig; 220 int code; 221 222 sig = linux_translate_traps(ksi->ksi_signo, ksi->ksi_trapno); 223 code = ksi->ksi_code; 224 PROC_LOCK_ASSERT(p, MA_OWNED); 225 psp = p->p_sigacts; 226 mtx_assert(&psp->ps_mtx, MA_OWNED); 227 regs = td->td_frame; 228 oonstack = sigonstack(regs->tf_rsp); 229 230 /* Allocate space for the signal handler context. */ 231 if ((td->td_pflags & TDP_ALTSTACK) && !oonstack && 232 SIGISMEMBER(psp->ps_sigonstack, sig)) { 233 fp = (struct l_rt_sigframe *)((uintptr_t)td->td_sigstk.ss_sp + 234 td->td_sigstk.ss_size - sizeof(struct l_rt_sigframe)); 235 } else 236 fp = (struct l_rt_sigframe *)regs->tf_rsp - 1; 237 mtx_unlock(&psp->ps_mtx); 238 239 /* Build the argument list for the signal handler. */ 240 sig = bsd_to_linux_signal(sig); 241 242 bzero(&frame, sizeof(frame)); 243 244 frame.sf_sig = sig; 245 frame.sf_siginfo = PTROUT(&fp->sf_si); 246 frame.sf_ucontext = PTROUT(&fp->sf_uc); 247 248 /* Fill in POSIX parts. */ 249 siginfo_to_lsiginfo(&ksi->ksi_info, &frame.sf_si, sig); 250 251 /* 252 * Build the signal context to be used by sigreturn and libgcc unwind. 253 */ 254 frame.sf_uc.uc_stack.ss_sp = PTROUT(td->td_sigstk.ss_sp); 255 frame.sf_uc.uc_stack.ss_size = td->td_sigstk.ss_size; 256 frame.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) 257 ? ((oonstack) ? LINUX_SS_ONSTACK : 0) : LINUX_SS_DISABLE; 258 PROC_UNLOCK(p); 259 260 bsd_to_linux_sigset(mask, &frame.sf_uc.uc_sigmask); 261 262 frame.sf_uc.uc_mcontext.sc_mask = frame.sf_uc.uc_sigmask.__mask; 263 frame.sf_uc.uc_mcontext.sc_edi = regs->tf_rdi; 264 frame.sf_uc.uc_mcontext.sc_esi = regs->tf_rsi; 265 frame.sf_uc.uc_mcontext.sc_ebp = regs->tf_rbp; 266 frame.sf_uc.uc_mcontext.sc_ebx = regs->tf_rbx; 267 frame.sf_uc.uc_mcontext.sc_esp = regs->tf_rsp; 268 frame.sf_uc.uc_mcontext.sc_edx = regs->tf_rdx; 269 frame.sf_uc.uc_mcontext.sc_ecx = regs->tf_rcx; 270 frame.sf_uc.uc_mcontext.sc_eax = regs->tf_rax; 271 frame.sf_uc.uc_mcontext.sc_eip = regs->tf_rip; 272 frame.sf_uc.uc_mcontext.sc_cs = regs->tf_cs; 273 frame.sf_uc.uc_mcontext.sc_gs = regs->tf_gs; 274 frame.sf_uc.uc_mcontext.sc_fs = regs->tf_fs; 275 frame.sf_uc.uc_mcontext.sc_es = regs->tf_es; 276 frame.sf_uc.uc_mcontext.sc_ds = regs->tf_ds; 277 frame.sf_uc.uc_mcontext.sc_eflags = regs->tf_rflags; 278 frame.sf_uc.uc_mcontext.sc_esp_at_signal = regs->tf_rsp; 279 frame.sf_uc.uc_mcontext.sc_ss = regs->tf_ss; 280 frame.sf_uc.uc_mcontext.sc_err = regs->tf_err; 281 frame.sf_uc.uc_mcontext.sc_cr2 = (u_int32_t)(uintptr_t)ksi->ksi_addr; 282 frame.sf_uc.uc_mcontext.sc_trapno = bsd_to_linux_trapcode(code); 283 284 if (copyout(&frame, fp, sizeof(frame)) != 0) { 285 /* 286 * Process has trashed its stack; give it an illegal 287 * instruction to halt it in its tracks. 288 */ 289 PROC_LOCK(p); 290 sigexit(td, SIGILL); 291 } 292 293 /* Build context to run handler in. */ 294 regs->tf_rsp = PTROUT(fp); 295 regs->tf_rip = linux32_vdso_rt_sigcode; 296 regs->tf_rdi = PTROUT(catcher); 297 regs->tf_rflags &= ~(PSL_T | PSL_D); 298 regs->tf_cs = _ucode32sel; 299 regs->tf_ss = _udatasel; 300 regs->tf_ds = _udatasel; 301 regs->tf_es = _udatasel; 302 regs->tf_fs = _ufssel; 303 regs->tf_gs = _ugssel; 304 regs->tf_flags = TF_HASSEGS; 305 set_pcb_flags(td->td_pcb, PCB_FULL_IRET); 306 PROC_LOCK(p); 307 mtx_lock(&psp->ps_mtx); 308 } 309 310 /* 311 * Send an interrupt to process. 312 * 313 * Stack is set up to allow sigcode stored 314 * in u. to call routine, followed by kcall 315 * to sigreturn routine below. After sigreturn 316 * resets the signal mask, the stack, and the 317 * frame pointer, it returns to the user 318 * specified pc, psl. 319 */ 320 static void 321 linux_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) 322 { 323 struct thread *td = curthread; 324 struct proc *p = td->td_proc; 325 struct sigacts *psp; 326 struct trapframe *regs; 327 struct l_sigframe *fp, frame; 328 l_sigset_t lmask; 329 int oonstack; 330 int sig, code; 331 332 sig = linux_translate_traps(ksi->ksi_signo, ksi->ksi_trapno); 333 code = ksi->ksi_code; 334 PROC_LOCK_ASSERT(p, MA_OWNED); 335 psp = p->p_sigacts; 336 mtx_assert(&psp->ps_mtx, MA_OWNED); 337 if (SIGISMEMBER(psp->ps_siginfo, sig)) { 338 /* Signal handler installed with SA_SIGINFO. */ 339 linux_rt_sendsig(catcher, ksi, mask); 340 return; 341 } 342 343 regs = td->td_frame; 344 oonstack = sigonstack(regs->tf_rsp); 345 346 /* Allocate space for the signal handler context. */ 347 if ((td->td_pflags & TDP_ALTSTACK) && !oonstack && 348 SIGISMEMBER(psp->ps_sigonstack, sig)) { 349 fp = (struct l_sigframe *)((uintptr_t)td->td_sigstk.ss_sp + 350 td->td_sigstk.ss_size - sizeof(struct l_sigframe)); 351 } else 352 fp = (struct l_sigframe *)regs->tf_rsp - 1; 353 mtx_unlock(&psp->ps_mtx); 354 PROC_UNLOCK(p); 355 356 /* Build the argument list for the signal handler. */ 357 sig = bsd_to_linux_signal(sig); 358 359 bzero(&frame, sizeof(frame)); 360 361 frame.sf_sig = sig; 362 frame.sf_sigmask = *mask; 363 bsd_to_linux_sigset(mask, &lmask); 364 365 /* Build the signal context to be used by sigreturn. */ 366 frame.sf_sc.sc_mask = lmask.__mask; 367 frame.sf_sc.sc_gs = regs->tf_gs; 368 frame.sf_sc.sc_fs = regs->tf_fs; 369 frame.sf_sc.sc_es = regs->tf_es; 370 frame.sf_sc.sc_ds = regs->tf_ds; 371 frame.sf_sc.sc_edi = regs->tf_rdi; 372 frame.sf_sc.sc_esi = regs->tf_rsi; 373 frame.sf_sc.sc_ebp = regs->tf_rbp; 374 frame.sf_sc.sc_ebx = regs->tf_rbx; 375 frame.sf_sc.sc_esp = regs->tf_rsp; 376 frame.sf_sc.sc_edx = regs->tf_rdx; 377 frame.sf_sc.sc_ecx = regs->tf_rcx; 378 frame.sf_sc.sc_eax = regs->tf_rax; 379 frame.sf_sc.sc_eip = regs->tf_rip; 380 frame.sf_sc.sc_cs = regs->tf_cs; 381 frame.sf_sc.sc_eflags = regs->tf_rflags; 382 frame.sf_sc.sc_esp_at_signal = regs->tf_rsp; 383 frame.sf_sc.sc_ss = regs->tf_ss; 384 frame.sf_sc.sc_err = regs->tf_err; 385 frame.sf_sc.sc_cr2 = (u_int32_t)(uintptr_t)ksi->ksi_addr; 386 frame.sf_sc.sc_trapno = bsd_to_linux_trapcode(code); 387 388 if (copyout(&frame, fp, sizeof(frame)) != 0) { 389 /* 390 * Process has trashed its stack; give it an illegal 391 * instruction to halt it in its tracks. 392 */ 393 PROC_LOCK(p); 394 sigexit(td, SIGILL); 395 } 396 397 /* Build context to run handler in. */ 398 regs->tf_rsp = PTROUT(fp); 399 regs->tf_rip = linux32_vdso_sigcode; 400 regs->tf_rdi = PTROUT(catcher); 401 regs->tf_rflags &= ~(PSL_T | PSL_D); 402 regs->tf_cs = _ucode32sel; 403 regs->tf_ss = _udatasel; 404 regs->tf_ds = _udatasel; 405 regs->tf_es = _udatasel; 406 regs->tf_fs = _ufssel; 407 regs->tf_gs = _ugssel; 408 regs->tf_flags = TF_HASSEGS; 409 set_pcb_flags(td->td_pcb, PCB_FULL_IRET); 410 PROC_LOCK(p); 411 mtx_lock(&psp->ps_mtx); 412 } 413 414 /* 415 * System call to cleanup state after a signal 416 * has been taken. Reset signal mask and 417 * stack state from context left by sendsig (above). 418 * Return to previous pc and psl as specified by 419 * context left by sendsig. Check carefully to 420 * make sure that the user has not modified the 421 * psl to gain improper privileges or to cause 422 * a machine fault. 423 */ 424 int 425 linux_sigreturn(struct thread *td, struct linux_sigreturn_args *args) 426 { 427 struct l_sigframe frame; 428 struct trapframe *regs; 429 int eflags; 430 ksiginfo_t ksi; 431 432 regs = td->td_frame; 433 434 /* 435 * The trampoline code hands us the sigframe. 436 * It is unsafe to keep track of it ourselves, in the event that a 437 * program jumps out of a signal handler. 438 */ 439 if (copyin(args->sfp, &frame, sizeof(frame)) != 0) 440 return (EFAULT); 441 442 /* Check for security violations. */ 443 eflags = frame.sf_sc.sc_eflags; 444 if (!EFL_SECURE(eflags, regs->tf_rflags)) 445 return(EINVAL); 446 447 /* 448 * Don't allow users to load a valid privileged %cs. Let the 449 * hardware check for invalid selectors, excess privilege in 450 * other selectors, invalid %eip's and invalid %esp's. 451 */ 452 if (!CS_SECURE(frame.sf_sc.sc_cs)) { 453 ksiginfo_init_trap(&ksi); 454 ksi.ksi_signo = SIGBUS; 455 ksi.ksi_code = BUS_OBJERR; 456 ksi.ksi_trapno = T_PROTFLT; 457 ksi.ksi_addr = (void *)regs->tf_rip; 458 trapsignal(td, &ksi); 459 return(EINVAL); 460 } 461 462 kern_sigprocmask(td, SIG_SETMASK, &frame.sf_sigmask, NULL, 0); 463 464 /* Restore signal context. */ 465 regs->tf_rdi = frame.sf_sc.sc_edi; 466 regs->tf_rsi = frame.sf_sc.sc_esi; 467 regs->tf_rbp = frame.sf_sc.sc_ebp; 468 regs->tf_rbx = frame.sf_sc.sc_ebx; 469 regs->tf_rdx = frame.sf_sc.sc_edx; 470 regs->tf_rcx = frame.sf_sc.sc_ecx; 471 regs->tf_rax = frame.sf_sc.sc_eax; 472 regs->tf_rip = frame.sf_sc.sc_eip; 473 regs->tf_cs = frame.sf_sc.sc_cs; 474 regs->tf_ds = frame.sf_sc.sc_ds; 475 regs->tf_es = frame.sf_sc.sc_es; 476 regs->tf_fs = frame.sf_sc.sc_fs; 477 regs->tf_gs = frame.sf_sc.sc_gs; 478 regs->tf_rflags = eflags; 479 regs->tf_rsp = frame.sf_sc.sc_esp_at_signal; 480 regs->tf_ss = frame.sf_sc.sc_ss; 481 set_pcb_flags(td->td_pcb, PCB_FULL_IRET); 482 483 return (EJUSTRETURN); 484 } 485 486 /* 487 * System call to cleanup state after a signal 488 * has been taken. Reset signal mask and 489 * stack state from context left by rt_sendsig (above). 490 * Return to previous pc and psl as specified by 491 * context left by sendsig. Check carefully to 492 * make sure that the user has not modified the 493 * psl to gain improper privileges or to cause 494 * a machine fault. 495 */ 496 int 497 linux_rt_sigreturn(struct thread *td, struct linux_rt_sigreturn_args *args) 498 { 499 struct l_ucontext uc; 500 struct l_sigcontext *context; 501 sigset_t bmask; 502 l_stack_t *lss; 503 stack_t ss; 504 struct trapframe *regs; 505 int eflags; 506 ksiginfo_t ksi; 507 508 regs = td->td_frame; 509 510 /* 511 * The trampoline code hands us the ucontext. 512 * It is unsafe to keep track of it ourselves, in the event that a 513 * program jumps out of a signal handler. 514 */ 515 if (copyin(args->ucp, &uc, sizeof(uc)) != 0) 516 return (EFAULT); 517 518 context = &uc.uc_mcontext; 519 520 /* Check for security violations. */ 521 eflags = context->sc_eflags; 522 if (!EFL_SECURE(eflags, regs->tf_rflags)) 523 return(EINVAL); 524 525 /* 526 * Don't allow users to load a valid privileged %cs. Let the 527 * hardware check for invalid selectors, excess privilege in 528 * other selectors, invalid %eip's and invalid %esp's. 529 */ 530 if (!CS_SECURE(context->sc_cs)) { 531 ksiginfo_init_trap(&ksi); 532 ksi.ksi_signo = SIGBUS; 533 ksi.ksi_code = BUS_OBJERR; 534 ksi.ksi_trapno = T_PROTFLT; 535 ksi.ksi_addr = (void *)regs->tf_rip; 536 trapsignal(td, &ksi); 537 return(EINVAL); 538 } 539 540 linux_to_bsd_sigset(&uc.uc_sigmask, &bmask); 541 kern_sigprocmask(td, SIG_SETMASK, &bmask, NULL, 0); 542 543 /* 544 * Restore signal context 545 */ 546 regs->tf_gs = context->sc_gs; 547 regs->tf_fs = context->sc_fs; 548 regs->tf_es = context->sc_es; 549 regs->tf_ds = context->sc_ds; 550 regs->tf_rdi = context->sc_edi; 551 regs->tf_rsi = context->sc_esi; 552 regs->tf_rbp = context->sc_ebp; 553 regs->tf_rbx = context->sc_ebx; 554 regs->tf_rdx = context->sc_edx; 555 regs->tf_rcx = context->sc_ecx; 556 regs->tf_rax = context->sc_eax; 557 regs->tf_rip = context->sc_eip; 558 regs->tf_cs = context->sc_cs; 559 regs->tf_rflags = eflags; 560 regs->tf_rsp = context->sc_esp_at_signal; 561 regs->tf_ss = context->sc_ss; 562 set_pcb_flags(td->td_pcb, PCB_FULL_IRET); 563 564 /* 565 * call sigaltstack & ignore results.. 566 */ 567 lss = &uc.uc_stack; 568 ss.ss_sp = PTRIN(lss->ss_sp); 569 ss.ss_size = lss->ss_size; 570 ss.ss_flags = linux_to_bsd_sigaltstack(lss->ss_flags); 571 572 (void)kern_sigaltstack(td, &ss, NULL); 573 574 return (EJUSTRETURN); 575 } 576 577 static int 578 linux32_fetch_syscall_args(struct thread *td) 579 { 580 struct proc *p; 581 struct trapframe *frame; 582 struct syscall_args *sa; 583 584 p = td->td_proc; 585 frame = td->td_frame; 586 sa = &td->td_sa; 587 588 sa->args[0] = frame->tf_rbx; 589 sa->args[1] = frame->tf_rcx; 590 sa->args[2] = frame->tf_rdx; 591 sa->args[3] = frame->tf_rsi; 592 sa->args[4] = frame->tf_rdi; 593 sa->args[5] = frame->tf_rbp; /* Unconfirmed */ 594 sa->code = frame->tf_rax; 595 sa->original_code = sa->code; 596 597 if (sa->code >= p->p_sysent->sv_size) 598 /* nosys */ 599 sa->callp = &p->p_sysent->sv_table[p->p_sysent->sv_size - 1]; 600 else 601 sa->callp = &p->p_sysent->sv_table[sa->code]; 602 603 td->td_retval[0] = 0; 604 td->td_retval[1] = frame->tf_rdx; 605 606 return (0); 607 } 608 609 static void 610 linux32_set_syscall_retval(struct thread *td, int error) 611 { 612 struct trapframe *frame = td->td_frame; 613 614 cpu_set_syscall_retval(td, error); 615 616 if (__predict_false(error != 0)) { 617 if (error != ERESTART && error != EJUSTRETURN) 618 frame->tf_rax = bsd_to_linux_errno(error); 619 } 620 } 621 622 static void 623 linux32_set_fork_retval(struct thread *td) 624 { 625 struct trapframe *frame = td->td_frame; 626 627 frame->tf_rax = 0; 628 } 629 630 /* 631 * Clear registers on exec 632 * XXX copied from ia32_signal.c. 633 */ 634 static void 635 linux_exec_setregs(struct thread *td, struct image_params *imgp, 636 uintptr_t stack) 637 { 638 struct trapframe *regs = td->td_frame; 639 struct pcb *pcb = td->td_pcb; 640 register_t saved_rflags; 641 642 regs = td->td_frame; 643 pcb = td->td_pcb; 644 645 if (td->td_proc->p_md.md_ldt != NULL) 646 user_ldt_free(td); 647 648 critical_enter(); 649 wrmsr(MSR_FSBASE, 0); 650 wrmsr(MSR_KGSBASE, 0); /* User value while we're in the kernel */ 651 pcb->pcb_fsbase = 0; 652 pcb->pcb_gsbase = 0; 653 critical_exit(); 654 pcb->pcb_initial_fpucw = __LINUX_NPXCW__; 655 656 saved_rflags = regs->tf_rflags & PSL_T; 657 bzero((char *)regs, sizeof(struct trapframe)); 658 regs->tf_rip = imgp->entry_addr; 659 regs->tf_rsp = stack; 660 regs->tf_rflags = PSL_USER | saved_rflags; 661 regs->tf_gs = _ugssel; 662 regs->tf_fs = _ufssel; 663 regs->tf_es = _udatasel; 664 regs->tf_ds = _udatasel; 665 regs->tf_ss = _udatasel; 666 regs->tf_flags = TF_HASSEGS; 667 regs->tf_cs = _ucode32sel; 668 regs->tf_rbx = (register_t)imgp->ps_strings; 669 670 x86_clear_dbregs(pcb); 671 672 fpstate_drop(td); 673 674 /* Do full restore on return so that we can change to a different %cs */ 675 set_pcb_flags(pcb, PCB_32BIT | PCB_FULL_IRET); 676 } 677 678 /* 679 * XXX copied from ia32_sysvec.c. 680 */ 681 static int 682 linux_copyout_strings(struct image_params *imgp, uintptr_t *stack_base) 683 { 684 int argc, envc, error; 685 u_int32_t *vectp; 686 char *stringp; 687 uintptr_t destp, ustringp; 688 struct linux32_ps_strings *arginfo; 689 char canary[LINUX_AT_RANDOM_LEN]; 690 size_t execpath_len; 691 692 arginfo = (struct linux32_ps_strings *)PROC_PS_STRINGS(imgp->proc); 693 destp = (uintptr_t)arginfo; 694 695 if (imgp->execpath != NULL && imgp->auxargs != NULL) { 696 execpath_len = strlen(imgp->execpath) + 1; 697 destp -= execpath_len; 698 destp = rounddown2(destp, sizeof(uint32_t)); 699 imgp->execpathp = (void *)destp; 700 error = copyout(imgp->execpath, imgp->execpathp, execpath_len); 701 if (error != 0) 702 return (error); 703 } 704 705 /* Prepare the canary for SSP. */ 706 arc4rand(canary, sizeof(canary), 0); 707 destp -= roundup(sizeof(canary), sizeof(uint32_t)); 708 imgp->canary = (void *)destp; 709 error = copyout(canary, imgp->canary, sizeof(canary)); 710 if (error != 0) 711 return (error); 712 713 /* Allocate room for the argument and environment strings. */ 714 destp -= ARG_MAX - imgp->args->stringspace; 715 destp = rounddown2(destp, sizeof(uint32_t)); 716 ustringp = destp; 717 718 if (imgp->auxargs) { 719 /* 720 * Allocate room on the stack for the ELF auxargs 721 * array. It has LINUX_AT_COUNT entries. 722 */ 723 destp -= LINUX_AT_COUNT * sizeof(Elf32_Auxinfo); 724 destp = rounddown2(destp, sizeof(uint32_t)); 725 } 726 727 vectp = (uint32_t *)destp; 728 729 /* 730 * Allocate room for the argv[] and env vectors including the 731 * terminating NULL pointers. 732 */ 733 vectp -= imgp->args->argc + 1 + imgp->args->envc + 1; 734 735 /* vectp also becomes our initial stack base. */ 736 *stack_base = (uintptr_t)vectp; 737 738 stringp = imgp->args->begin_argv; 739 argc = imgp->args->argc; 740 envc = imgp->args->envc; 741 742 /* Copy out strings - arguments and environment. */ 743 error = copyout(stringp, (void *)ustringp, 744 ARG_MAX - imgp->args->stringspace); 745 if (error != 0) 746 return (error); 747 748 /* Fill in "ps_strings" struct for ps, w, etc. */ 749 if (suword32(&arginfo->ps_argvstr, (uint32_t)(intptr_t)vectp) != 0 || 750 suword32(&arginfo->ps_nargvstr, argc) != 0) 751 return (EFAULT); 752 753 /* Fill in argument portion of vector table. */ 754 for (; argc > 0; --argc) { 755 if (suword32(vectp++, ustringp) != 0) 756 return (EFAULT); 757 while (*stringp++ != 0) 758 ustringp++; 759 ustringp++; 760 } 761 762 /* A null vector table pointer separates the argp's from the envp's. */ 763 if (suword32(vectp++, 0) != 0) 764 return (EFAULT); 765 766 if (suword32(&arginfo->ps_envstr, (uint32_t)(intptr_t)vectp) != 0 || 767 suword32(&arginfo->ps_nenvstr, envc) != 0) 768 return (EFAULT); 769 770 /* Fill in environment portion of vector table. */ 771 for (; envc > 0; --envc) { 772 if (suword32(vectp++, ustringp) != 0) 773 return (EFAULT); 774 while (*stringp++ != 0) 775 ustringp++; 776 ustringp++; 777 } 778 779 /* The end of the vector table is a null pointer. */ 780 if (suword32(vectp, 0) != 0) 781 return (EFAULT); 782 783 if (imgp->auxargs) { 784 vectp++; 785 error = imgp->sysent->sv_copyout_auxargs(imgp, 786 (uintptr_t)vectp); 787 if (error != 0) 788 return (error); 789 } 790 791 return (0); 792 } 793 794 static SYSCTL_NODE(_compat, OID_AUTO, linux32, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 795 "32-bit Linux emulation"); 796 797 static u_long linux32_maxdsiz = LINUX32_MAXDSIZ; 798 SYSCTL_ULONG(_compat_linux32, OID_AUTO, maxdsiz, CTLFLAG_RW, 799 &linux32_maxdsiz, 0, ""); 800 static u_long linux32_maxssiz = LINUX32_MAXSSIZ; 801 SYSCTL_ULONG(_compat_linux32, OID_AUTO, maxssiz, CTLFLAG_RW, 802 &linux32_maxssiz, 0, ""); 803 static u_long linux32_maxvmem = LINUX32_MAXVMEM; 804 SYSCTL_ULONG(_compat_linux32, OID_AUTO, maxvmem, CTLFLAG_RW, 805 &linux32_maxvmem, 0, ""); 806 bool linux32_emulate_i386 = false; 807 SYSCTL_BOOL(_compat_linux32, OID_AUTO, emulate_i386, CTLFLAG_RWTUN, 808 &linux32_emulate_i386, 0, "Emulate the real i386"); 809 810 static void 811 linux32_fixlimit(struct rlimit *rl, int which) 812 { 813 814 switch (which) { 815 case RLIMIT_DATA: 816 if (linux32_maxdsiz != 0) { 817 if (rl->rlim_cur > linux32_maxdsiz) 818 rl->rlim_cur = linux32_maxdsiz; 819 if (rl->rlim_max > linux32_maxdsiz) 820 rl->rlim_max = linux32_maxdsiz; 821 } 822 break; 823 case RLIMIT_STACK: 824 if (linux32_maxssiz != 0) { 825 if (rl->rlim_cur > linux32_maxssiz) 826 rl->rlim_cur = linux32_maxssiz; 827 if (rl->rlim_max > linux32_maxssiz) 828 rl->rlim_max = linux32_maxssiz; 829 } 830 break; 831 case RLIMIT_VMEM: 832 if (linux32_maxvmem != 0) { 833 if (rl->rlim_cur > linux32_maxvmem) 834 rl->rlim_cur = linux32_maxvmem; 835 if (rl->rlim_max > linux32_maxvmem) 836 rl->rlim_max = linux32_maxvmem; 837 } 838 break; 839 } 840 } 841 842 struct sysentvec elf_linux_sysvec = { 843 .sv_size = LINUX32_SYS_MAXSYSCALL, 844 .sv_table = linux32_sysent, 845 .sv_fixup = elf32_freebsd_fixup, 846 .sv_sendsig = linux_sendsig, 847 .sv_sigcode = &_binary_linux32_vdso_so_o_start, 848 .sv_szsigcode = &linux_szsigcode, 849 .sv_name = "Linux ELF32", 850 .sv_coredump = elf32_coredump, 851 .sv_elf_core_osabi = ELFOSABI_NONE, 852 .sv_elf_core_abi_vendor = LINUX_ABI_VENDOR, 853 .sv_elf_core_prepare_notes = linux32_prepare_notes, 854 .sv_imgact_try = linux_exec_imgact_try, 855 .sv_minsigstksz = LINUX_MINSIGSTKSZ, 856 .sv_minuser = VM_MIN_ADDRESS, 857 .sv_maxuser = LINUX32_MAXUSER, 858 .sv_usrstack = LINUX32_USRSTACK, 859 .sv_psstrings = LINUX32_PS_STRINGS, 860 .sv_psstringssz = sizeof(struct linux32_ps_strings), 861 .sv_stackprot = VM_PROT_ALL, 862 .sv_copyout_auxargs = linux_copyout_auxargs, 863 .sv_copyout_strings = linux_copyout_strings, 864 .sv_setregs = linux_exec_setregs, 865 .sv_fixlimit = linux32_fixlimit, 866 .sv_maxssiz = &linux32_maxssiz, 867 .sv_flags = SV_ABI_LINUX | SV_ILP32 | SV_IA32 | SV_SHP | 868 SV_SIG_DISCIGN | SV_SIG_WAITNDQ | SV_TIMEKEEP, 869 .sv_set_syscall_retval = linux32_set_syscall_retval, 870 .sv_fetch_syscall_args = linux32_fetch_syscall_args, 871 .sv_syscallnames = linux32_syscallnames, 872 .sv_shared_page_base = LINUX32_SHAREDPAGE, 873 .sv_shared_page_len = PAGE_SIZE, 874 .sv_schedtail = linux_schedtail, 875 .sv_thread_detach = linux_thread_detach, 876 .sv_trap = NULL, 877 .sv_onexec = linux_on_exec_vmspace, 878 .sv_onexit = linux_on_exit, 879 .sv_ontdexit = linux_thread_dtor, 880 .sv_setid_allowed = &linux_setid_allowed_query, 881 .sv_set_fork_retval = linux32_set_fork_retval, 882 }; 883 884 static int 885 linux_on_exec_vmspace(struct proc *p, struct image_params *imgp) 886 { 887 int error; 888 889 error = linux_map_vdso(p, linux_vdso_obj, linux_vdso_base, 890 LINUX32_VDSOPAGE_SIZE, imgp); 891 if (error == 0) 892 linux_on_exec(p, imgp); 893 return (error); 894 } 895 896 /* 897 * linux_vdso_install() and linux_exec_sysvec_init() must be called 898 * after exec_sysvec_init() which is SI_SUB_EXEC (SI_ORDER_ANY). 899 */ 900 static void 901 linux_exec_sysvec_init(void *param) 902 { 903 l_uintptr_t *ktimekeep_base, *ktsc_selector; 904 struct sysentvec *sv; 905 ptrdiff_t tkoff; 906 907 sv = param; 908 /* Fill timekeep_base */ 909 exec_sysvec_init(sv); 910 911 tkoff = kern_timekeep_base - linux_vdso_base; 912 ktimekeep_base = (l_uintptr_t *)(linux_vdso_mapping + tkoff); 913 *ktimekeep_base = sv->sv_shared_page_base + sv->sv_timekeep_offset; 914 915 tkoff = kern_tsc_selector - linux_vdso_base; 916 ktsc_selector = (l_uintptr_t *)(linux_vdso_mapping + tkoff); 917 *ktsc_selector = linux_vdso_tsc_selector_idx(); 918 if (bootverbose) 919 printf("Linux i386 vDSO tsc_selector: %u\n", *ktsc_selector); 920 921 tkoff = kern_cpu_selector - linux_vdso_base; 922 ktsc_selector = (l_uintptr_t *)(linux_vdso_mapping + tkoff); 923 *ktsc_selector = linux_vdso_cpu_selector_idx(); 924 if (bootverbose) 925 printf("Linux i386 vDSO cpu_selector: %u\n", *ktsc_selector); 926 } 927 SYSINIT(elf_linux_exec_sysvec_init, SI_SUB_EXEC + 1, SI_ORDER_ANY, 928 linux_exec_sysvec_init, &elf_linux_sysvec); 929 930 static void 931 linux_vdso_install(const void *param) 932 { 933 char *vdso_start = &_binary_linux32_vdso_so_o_start; 934 char *vdso_end = &_binary_linux32_vdso_so_o_end; 935 936 linux_szsigcode = vdso_end - vdso_start; 937 MPASS(linux_szsigcode <= LINUX32_VDSOPAGE_SIZE); 938 939 linux_vdso_base = LINUX32_VDSOPAGE; 940 941 __elfN(linux_vdso_fixup)(vdso_start, linux_vdso_base); 942 943 linux_vdso_obj = __elfN(linux_shared_page_init) 944 (&linux_vdso_mapping, LINUX32_VDSOPAGE_SIZE); 945 bcopy(vdso_start, linux_vdso_mapping, linux_szsigcode); 946 947 linux_vdso_reloc(linux_vdso_mapping, linux_vdso_base); 948 } 949 SYSINIT(elf_linux_vdso_init, SI_SUB_EXEC + 1, SI_ORDER_FIRST, 950 linux_vdso_install, NULL); 951 952 static void 953 linux_vdso_deinstall(const void *param) 954 { 955 956 __elfN(linux_shared_page_fini)(linux_vdso_obj, 957 linux_vdso_mapping, LINUX32_VDSOPAGE_SIZE); 958 } 959 SYSUNINIT(elf_linux_vdso_uninit, SI_SUB_EXEC, SI_ORDER_FIRST, 960 linux_vdso_deinstall, NULL); 961 962 static void 963 linux_vdso_reloc(char *mapping, Elf_Addr offset) 964 { 965 const Elf_Shdr *shdr; 966 const Elf_Rel *rel; 967 const Elf_Ehdr *ehdr; 968 Elf32_Addr *where; 969 Elf_Size rtype, symidx; 970 Elf32_Addr addr, addend; 971 int i, relcnt; 972 973 MPASS(offset != 0); 974 975 relcnt = 0; 976 ehdr = (const Elf_Ehdr *)mapping; 977 shdr = (const Elf_Shdr *)(mapping + ehdr->e_shoff); 978 for (i = 0; i < ehdr->e_shnum; i++) 979 { 980 switch (shdr[i].sh_type) { 981 case SHT_REL: 982 rel = (const Elf_Rel *)(mapping + shdr[i].sh_offset); 983 relcnt = shdr[i].sh_size / sizeof(*rel); 984 break; 985 case SHT_RELA: 986 printf("Linux i386 vDSO: unexpected Rela section\n"); 987 break; 988 } 989 } 990 991 for (i = 0; i < relcnt; i++, rel++) { 992 where = (Elf32_Addr *)(mapping + rel->r_offset); 993 addend = *where; 994 rtype = ELF_R_TYPE(rel->r_info); 995 symidx = ELF_R_SYM(rel->r_info); 996 997 switch (rtype) { 998 case R_386_NONE: /* none */ 999 break; 1000 1001 case R_386_RELATIVE: /* B + A */ 1002 addr = (Elf32_Addr)PTROUT(offset + addend); 1003 if (*where != addr) 1004 *where = addr; 1005 break; 1006 1007 case R_386_IRELATIVE: 1008 printf("Linux i386 vDSO: unexpected ifunc relocation, " 1009 "symbol index %ld\n", (intmax_t)symidx); 1010 break; 1011 default: 1012 printf("Linux i386 vDSO: unexpected relocation type %ld, " 1013 "symbol index %ld\n", (intmax_t)rtype, (intmax_t)symidx); 1014 } 1015 } 1016 } 1017 1018 static Elf_Brandnote linux32_brandnote = { 1019 .hdr.n_namesz = sizeof(GNU_ABI_VENDOR), 1020 .hdr.n_descsz = 16, /* XXX at least 16 */ 1021 .hdr.n_type = 1, 1022 .vendor = GNU_ABI_VENDOR, 1023 .flags = BN_TRANSLATE_OSREL, 1024 .trans_osrel = linux_trans_osrel 1025 }; 1026 1027 static Elf32_Brandinfo linux_brand = { 1028 .brand = ELFOSABI_LINUX, 1029 .machine = EM_386, 1030 .compat_3_brand = "Linux", 1031 .emul_path = linux_emul_path, 1032 .interp_path = "/lib/ld-linux.so.1", 1033 .sysvec = &elf_linux_sysvec, 1034 .interp_newpath = NULL, 1035 .brand_note = &linux32_brandnote, 1036 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 1037 }; 1038 1039 static Elf32_Brandinfo linux_glibc2brand = { 1040 .brand = ELFOSABI_LINUX, 1041 .machine = EM_386, 1042 .compat_3_brand = "Linux", 1043 .emul_path = linux_emul_path, 1044 .interp_path = "/lib/ld-linux.so.2", 1045 .sysvec = &elf_linux_sysvec, 1046 .interp_newpath = NULL, 1047 .brand_note = &linux32_brandnote, 1048 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 1049 }; 1050 1051 static Elf32_Brandinfo linux_muslbrand = { 1052 .brand = ELFOSABI_LINUX, 1053 .machine = EM_386, 1054 .compat_3_brand = "Linux", 1055 .emul_path = linux_emul_path, 1056 .interp_path = "/lib/ld-musl-i386.so.1", 1057 .sysvec = &elf_linux_sysvec, 1058 .interp_newpath = NULL, 1059 .brand_note = &linux32_brandnote, 1060 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE | 1061 LINUX_BI_FUTEX_REQUEUE 1062 }; 1063 1064 Elf32_Brandinfo *linux_brandlist[] = { 1065 &linux_brand, 1066 &linux_glibc2brand, 1067 &linux_muslbrand, 1068 NULL 1069 }; 1070 1071 static int 1072 linux_elf_modevent(module_t mod, int type, void *data) 1073 { 1074 Elf32_Brandinfo **brandinfo; 1075 int error; 1076 struct linux_ioctl_handler **lihp; 1077 1078 error = 0; 1079 1080 switch(type) { 1081 case MOD_LOAD: 1082 for (brandinfo = &linux_brandlist[0]; *brandinfo != NULL; 1083 ++brandinfo) 1084 if (elf32_insert_brand_entry(*brandinfo) < 0) 1085 error = EINVAL; 1086 if (error == 0) { 1087 SET_FOREACH(lihp, linux_ioctl_handler_set) 1088 linux32_ioctl_register_handler(*lihp); 1089 stclohz = (stathz ? stathz : hz); 1090 if (bootverbose) 1091 printf("Linux i386 ELF exec handler installed\n"); 1092 } else 1093 printf("cannot insert Linux i386 ELF brand handler\n"); 1094 break; 1095 case MOD_UNLOAD: 1096 for (brandinfo = &linux_brandlist[0]; *brandinfo != NULL; 1097 ++brandinfo) 1098 if (elf32_brand_inuse(*brandinfo)) 1099 error = EBUSY; 1100 if (error == 0) { 1101 for (brandinfo = &linux_brandlist[0]; 1102 *brandinfo != NULL; ++brandinfo) 1103 if (elf32_remove_brand_entry(*brandinfo) < 0) 1104 error = EINVAL; 1105 } 1106 if (error == 0) { 1107 SET_FOREACH(lihp, linux_ioctl_handler_set) 1108 linux32_ioctl_unregister_handler(*lihp); 1109 if (bootverbose) 1110 printf("Linux i386 ELF exec handler removed\n"); 1111 } else 1112 printf("Could not deinstall Linux i386 ELF interpreter entry\n"); 1113 break; 1114 default: 1115 return (EOPNOTSUPP); 1116 } 1117 return (error); 1118 } 1119 1120 static moduledata_t linux_elf_mod = { 1121 "linuxelf", 1122 linux_elf_modevent, 1123 0 1124 }; 1125 1126 DECLARE_MODULE_TIED(linuxelf, linux_elf_mod, SI_SUB_EXEC, SI_ORDER_ANY); 1127 MODULE_DEPEND(linuxelf, linux_common, 1, 1, 1); 1128 FEATURE(linux, "Linux 32bit support"); 1129