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