linux_sysvec.c revision 258559
1/*- 2 * Copyright (c) 1994-1996 S��ren Schmidt 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD: stable/10/sys/i386/linux/linux_sysvec.c 258559 2013-11-25 15:58:48Z emaste $"); 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/sysent.h> 48#include <sys/sysproto.h> 49#include <sys/vnode.h> 50#include <sys/eventhandler.h> 51 52#include <vm/vm.h> 53#include <vm/pmap.h> 54#include <vm/vm_extern.h> 55#include <vm/vm_map.h> 56#include <vm/vm_object.h> 57#include <vm/vm_page.h> 58#include <vm/vm_param.h> 59 60#include <machine/cpu.h> 61#include <machine/cputypes.h> 62#include <machine/md_var.h> 63#include <machine/pcb.h> 64 65#include <i386/linux/linux.h> 66#include <i386/linux/linux_proto.h> 67#include <compat/linux/linux_emul.h> 68#include <compat/linux/linux_futex.h> 69#include <compat/linux/linux_ioctl.h> 70#include <compat/linux/linux_mib.h> 71#include <compat/linux/linux_misc.h> 72#include <compat/linux/linux_signal.h> 73#include <compat/linux/linux_util.h> 74 75MODULE_VERSION(linux, 1); 76 77MALLOC_DEFINE(M_LINUX, "linux", "Linux mode structures"); 78 79#if BYTE_ORDER == LITTLE_ENDIAN 80#define SHELLMAGIC 0x2123 /* #! */ 81#else 82#define SHELLMAGIC 0x2321 83#endif 84 85/* 86 * Allow the sendsig functions to use the ldebug() facility 87 * even though they are not syscalls themselves. Map them 88 * to syscall 0. This is slightly less bogus than using 89 * ldebug(sigreturn). 90 */ 91#define LINUX_SYS_linux_rt_sendsig 0 92#define LINUX_SYS_linux_sendsig 0 93 94#define LINUX_PS_STRINGS (LINUX_USRSTACK - sizeof(struct ps_strings)) 95 96extern char linux_sigcode[]; 97extern int linux_szsigcode; 98 99extern struct sysent linux_sysent[LINUX_SYS_MAXSYSCALL]; 100 101SET_DECLARE(linux_ioctl_handler_set, struct linux_ioctl_handler); 102SET_DECLARE(linux_device_handler_set, struct linux_device_handler); 103 104static int linux_fixup(register_t **stack_base, 105 struct image_params *iparams); 106static int elf_linux_fixup(register_t **stack_base, 107 struct image_params *iparams); 108static void linux_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask); 109static void exec_linux_setregs(struct thread *td, 110 struct image_params *imgp, u_long stack); 111static register_t *linux_copyout_strings(struct image_params *imgp); 112static boolean_t linux_trans_osrel(const Elf_Note *note, int32_t *osrel); 113 114static int linux_szplatform; 115const char *linux_platform; 116 117static eventhandler_tag linux_exit_tag; 118static eventhandler_tag linux_exec_tag; 119 120/* 121 * Linux syscalls return negative errno's, we do positive and map them 122 * Reference: 123 * FreeBSD: src/sys/sys/errno.h 124 * Linux: linux-2.6.17.8/include/asm-generic/errno-base.h 125 * linux-2.6.17.8/include/asm-generic/errno.h 126 */ 127static int bsd_to_linux_errno[ELAST + 1] = { 128 -0, -1, -2, -3, -4, -5, -6, -7, -8, -9, 129 -10, -35, -12, -13, -14, -15, -16, -17, -18, -19, 130 -20, -21, -22, -23, -24, -25, -26, -27, -28, -29, 131 -30, -31, -32, -33, -34, -11,-115,-114, -88, -89, 132 -90, -91, -92, -93, -94, -95, -96, -97, -98, -99, 133 -100,-101,-102,-103,-104,-105,-106,-107,-108,-109, 134 -110,-111, -40, -36,-112,-113, -39, -11, -87,-122, 135 -116, -66, -6, -6, -6, -6, -6, -37, -38, -9, 136 -6, -6, -43, -42, -75,-125, -84, -95, -16, -74, 137 -72, -67, -71 138}; 139 140int bsd_to_linux_signal[LINUX_SIGTBLSZ] = { 141 LINUX_SIGHUP, LINUX_SIGINT, LINUX_SIGQUIT, LINUX_SIGILL, 142 LINUX_SIGTRAP, LINUX_SIGABRT, 0, LINUX_SIGFPE, 143 LINUX_SIGKILL, LINUX_SIGBUS, LINUX_SIGSEGV, LINUX_SIGSYS, 144 LINUX_SIGPIPE, LINUX_SIGALRM, LINUX_SIGTERM, LINUX_SIGURG, 145 LINUX_SIGSTOP, LINUX_SIGTSTP, LINUX_SIGCONT, LINUX_SIGCHLD, 146 LINUX_SIGTTIN, LINUX_SIGTTOU, LINUX_SIGIO, LINUX_SIGXCPU, 147 LINUX_SIGXFSZ, LINUX_SIGVTALRM, LINUX_SIGPROF, LINUX_SIGWINCH, 148 0, LINUX_SIGUSR1, LINUX_SIGUSR2 149}; 150 151int linux_to_bsd_signal[LINUX_SIGTBLSZ] = { 152 SIGHUP, SIGINT, SIGQUIT, SIGILL, 153 SIGTRAP, SIGABRT, SIGBUS, SIGFPE, 154 SIGKILL, SIGUSR1, SIGSEGV, SIGUSR2, 155 SIGPIPE, SIGALRM, SIGTERM, SIGBUS, 156 SIGCHLD, SIGCONT, SIGSTOP, SIGTSTP, 157 SIGTTIN, SIGTTOU, SIGURG, SIGXCPU, 158 SIGXFSZ, SIGVTALRM, SIGPROF, SIGWINCH, 159 SIGIO, SIGURG, SIGSYS 160}; 161 162#define LINUX_T_UNKNOWN 255 163static int _bsd_to_linux_trapcode[] = { 164 LINUX_T_UNKNOWN, /* 0 */ 165 6, /* 1 T_PRIVINFLT */ 166 LINUX_T_UNKNOWN, /* 2 */ 167 3, /* 3 T_BPTFLT */ 168 LINUX_T_UNKNOWN, /* 4 */ 169 LINUX_T_UNKNOWN, /* 5 */ 170 16, /* 6 T_ARITHTRAP */ 171 254, /* 7 T_ASTFLT */ 172 LINUX_T_UNKNOWN, /* 8 */ 173 13, /* 9 T_PROTFLT */ 174 1, /* 10 T_TRCTRAP */ 175 LINUX_T_UNKNOWN, /* 11 */ 176 14, /* 12 T_PAGEFLT */ 177 LINUX_T_UNKNOWN, /* 13 */ 178 17, /* 14 T_ALIGNFLT */ 179 LINUX_T_UNKNOWN, /* 15 */ 180 LINUX_T_UNKNOWN, /* 16 */ 181 LINUX_T_UNKNOWN, /* 17 */ 182 0, /* 18 T_DIVIDE */ 183 2, /* 19 T_NMI */ 184 4, /* 20 T_OFLOW */ 185 5, /* 21 T_BOUND */ 186 7, /* 22 T_DNA */ 187 8, /* 23 T_DOUBLEFLT */ 188 9, /* 24 T_FPOPFLT */ 189 10, /* 25 T_TSSFLT */ 190 11, /* 26 T_SEGNPFLT */ 191 12, /* 27 T_STKFLT */ 192 18, /* 28 T_MCHK */ 193 19, /* 29 T_XMMFLT */ 194 15 /* 30 T_RESERVED */ 195}; 196#define bsd_to_linux_trapcode(code) \ 197 ((code)<sizeof(_bsd_to_linux_trapcode)/sizeof(*_bsd_to_linux_trapcode)? \ 198 _bsd_to_linux_trapcode[(code)]: \ 199 LINUX_T_UNKNOWN) 200 201/* 202 * If FreeBSD & Linux have a difference of opinion about what a trap 203 * means, deal with it here. 204 * 205 * MPSAFE 206 */ 207static int 208translate_traps(int signal, int trap_code) 209{ 210 if (signal != SIGBUS) 211 return signal; 212 switch (trap_code) { 213 case T_PROTFLT: 214 case T_TSSFLT: 215 case T_DOUBLEFLT: 216 case T_PAGEFLT: 217 return SIGSEGV; 218 default: 219 return signal; 220 } 221} 222 223static int 224linux_fixup(register_t **stack_base, struct image_params *imgp) 225{ 226 register_t *argv, *envp; 227 228 argv = *stack_base; 229 envp = *stack_base + (imgp->args->argc + 1); 230 (*stack_base)--; 231 suword(*stack_base, (intptr_t)(void *)envp); 232 (*stack_base)--; 233 suword(*stack_base, (intptr_t)(void *)argv); 234 (*stack_base)--; 235 suword(*stack_base, imgp->args->argc); 236 return (0); 237} 238 239static int 240elf_linux_fixup(register_t **stack_base, struct image_params *imgp) 241{ 242 struct proc *p; 243 Elf32_Auxargs *args; 244 Elf32_Addr *uplatform; 245 struct ps_strings *arginfo; 246 register_t *pos; 247 248 KASSERT(curthread->td_proc == imgp->proc, 249 ("unsafe elf_linux_fixup(), should be curproc")); 250 251 p = imgp->proc; 252 arginfo = (struct ps_strings *)p->p_sysent->sv_psstrings; 253 uplatform = (Elf32_Addr *)((caddr_t)arginfo - linux_szplatform); 254 args = (Elf32_Auxargs *)imgp->auxargs; 255 pos = *stack_base + (imgp->args->argc + imgp->args->envc + 2); 256 257 AUXARGS_ENTRY(pos, LINUX_AT_HWCAP, cpu_feature); 258 259 /* 260 * Do not export AT_CLKTCK when emulating Linux kernel prior to 2.4.0, 261 * as it has appeared in the 2.4.0-rc7 first time. 262 * Being exported, AT_CLKTCK is returned by sysconf(_SC_CLK_TCK), 263 * glibc falls back to the hard-coded CLK_TCK value when aux entry 264 * is not present. 265 * Also see linux_times() implementation. 266 */ 267 if (linux_kernver(curthread) >= LINUX_KERNVER_2004000) 268 AUXARGS_ENTRY(pos, LINUX_AT_CLKTCK, stclohz); 269 AUXARGS_ENTRY(pos, AT_PHDR, args->phdr); 270 AUXARGS_ENTRY(pos, AT_PHENT, args->phent); 271 AUXARGS_ENTRY(pos, AT_PHNUM, args->phnum); 272 AUXARGS_ENTRY(pos, AT_PAGESZ, args->pagesz); 273 AUXARGS_ENTRY(pos, AT_FLAGS, args->flags); 274 AUXARGS_ENTRY(pos, AT_ENTRY, args->entry); 275 AUXARGS_ENTRY(pos, AT_BASE, args->base); 276 AUXARGS_ENTRY(pos, LINUX_AT_SECURE, 0); 277 AUXARGS_ENTRY(pos, AT_UID, imgp->proc->p_ucred->cr_ruid); 278 AUXARGS_ENTRY(pos, AT_EUID, imgp->proc->p_ucred->cr_svuid); 279 AUXARGS_ENTRY(pos, AT_GID, imgp->proc->p_ucred->cr_rgid); 280 AUXARGS_ENTRY(pos, AT_EGID, imgp->proc->p_ucred->cr_svgid); 281 AUXARGS_ENTRY(pos, LINUX_AT_PLATFORM, PTROUT(uplatform)); 282 if (args->execfd != -1) 283 AUXARGS_ENTRY(pos, AT_EXECFD, args->execfd); 284 AUXARGS_ENTRY(pos, AT_NULL, 0); 285 286 free(imgp->auxargs, M_TEMP); 287 imgp->auxargs = NULL; 288 289 (*stack_base)--; 290 suword(*stack_base, (register_t)imgp->args->argc); 291 return (0); 292} 293 294/* 295 * Copied from kern/kern_exec.c 296 */ 297static register_t * 298linux_copyout_strings(struct image_params *imgp) 299{ 300 int argc, envc; 301 char **vectp; 302 char *stringp, *destp; 303 register_t *stack_base; 304 struct ps_strings *arginfo; 305 struct proc *p; 306 307 /* 308 * Calculate string base and vector table pointers. 309 * Also deal with signal trampoline code for this exec type. 310 */ 311 p = imgp->proc; 312 arginfo = (struct ps_strings *)p->p_sysent->sv_psstrings; 313 destp = (caddr_t)arginfo - SPARE_USRSPACE - linux_szplatform - 314 roundup((ARG_MAX - imgp->args->stringspace), sizeof(char *)); 315 316 /* 317 * install LINUX_PLATFORM 318 */ 319 copyout(linux_platform, ((caddr_t)arginfo - linux_szplatform), 320 linux_szplatform); 321 322 /* 323 * If we have a valid auxargs ptr, prepare some room 324 * on the stack. 325 */ 326 if (imgp->auxargs) { 327 /* 328 * 'AT_COUNT*2' is size for the ELF Auxargs data. This is for 329 * lower compatibility. 330 */ 331 imgp->auxarg_size = (imgp->auxarg_size) ? imgp->auxarg_size : 332 (LINUX_AT_COUNT * 2); 333 /* 334 * The '+ 2' is for the null pointers at the end of each of 335 * the arg and env vector sets,and imgp->auxarg_size is room 336 * for argument of Runtime loader. 337 */ 338 vectp = (char **)(destp - (imgp->args->argc + 339 imgp->args->envc + 2 + imgp->auxarg_size) * sizeof(char *)); 340 } else { 341 /* 342 * The '+ 2' is for the null pointers at the end of each of 343 * the arg and env vector sets 344 */ 345 vectp = (char **)(destp - (imgp->args->argc + imgp->args->envc + 2) * 346 sizeof(char *)); 347 } 348 349 /* 350 * vectp also becomes our initial stack base 351 */ 352 stack_base = (register_t *)vectp; 353 354 stringp = imgp->args->begin_argv; 355 argc = imgp->args->argc; 356 envc = imgp->args->envc; 357 358 /* 359 * Copy out strings - arguments and environment. 360 */ 361 copyout(stringp, destp, ARG_MAX - imgp->args->stringspace); 362 363 /* 364 * Fill in "ps_strings" struct for ps, w, etc. 365 */ 366 suword(&arginfo->ps_argvstr, (long)(intptr_t)vectp); 367 suword(&arginfo->ps_nargvstr, argc); 368 369 /* 370 * Fill in argument portion of vector table. 371 */ 372 for (; argc > 0; --argc) { 373 suword(vectp++, (long)(intptr_t)destp); 374 while (*stringp++ != 0) 375 destp++; 376 destp++; 377 } 378 379 /* a null vector table pointer separates the argp's from the envp's */ 380 suword(vectp++, 0); 381 382 suword(&arginfo->ps_envstr, (long)(intptr_t)vectp); 383 suword(&arginfo->ps_nenvstr, envc); 384 385 /* 386 * Fill in environment portion of vector table. 387 */ 388 for (; envc > 0; --envc) { 389 suword(vectp++, (long)(intptr_t)destp); 390 while (*stringp++ != 0) 391 destp++; 392 destp++; 393 } 394 395 /* end of vector table is a null pointer */ 396 suword(vectp, 0); 397 398 return (stack_base); 399} 400 401 402 403extern int _ucodesel, _udatasel; 404extern unsigned long linux_sznonrtsigcode; 405 406static void 407linux_rt_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) 408{ 409 struct thread *td = curthread; 410 struct proc *p = td->td_proc; 411 struct sigacts *psp; 412 struct trapframe *regs; 413 struct l_rt_sigframe *fp, frame; 414 int sig, code; 415 int oonstack; 416 417 sig = ksi->ksi_signo; 418 code = ksi->ksi_code; 419 PROC_LOCK_ASSERT(p, MA_OWNED); 420 psp = p->p_sigacts; 421 mtx_assert(&psp->ps_mtx, MA_OWNED); 422 regs = td->td_frame; 423 oonstack = sigonstack(regs->tf_esp); 424 425#ifdef DEBUG 426 if (ldebug(rt_sendsig)) 427 printf(ARGS(rt_sendsig, "%p, %d, %p, %u"), 428 catcher, sig, (void*)mask, code); 429#endif 430 /* 431 * Allocate space for the signal handler context. 432 */ 433 if ((td->td_pflags & TDP_ALTSTACK) && !oonstack && 434 SIGISMEMBER(psp->ps_sigonstack, sig)) { 435 fp = (struct l_rt_sigframe *)(td->td_sigstk.ss_sp + 436 td->td_sigstk.ss_size - sizeof(struct l_rt_sigframe)); 437 } else 438 fp = (struct l_rt_sigframe *)regs->tf_esp - 1; 439 mtx_unlock(&psp->ps_mtx); 440 441 /* 442 * Build the argument list for the signal handler. 443 */ 444 if (p->p_sysent->sv_sigtbl) 445 if (sig <= p->p_sysent->sv_sigsize) 446 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)]; 447 448 bzero(&frame, sizeof(frame)); 449 450 frame.sf_handler = catcher; 451 frame.sf_sig = sig; 452 frame.sf_siginfo = &fp->sf_si; 453 frame.sf_ucontext = &fp->sf_sc; 454 455 /* Fill in POSIX parts */ 456 ksiginfo_to_lsiginfo(ksi, &frame.sf_si, sig); 457 458 /* 459 * Build the signal context to be used by sigreturn. 460 */ 461 frame.sf_sc.uc_flags = 0; /* XXX ??? */ 462 frame.sf_sc.uc_link = NULL; /* XXX ??? */ 463 464 frame.sf_sc.uc_stack.ss_sp = td->td_sigstk.ss_sp; 465 frame.sf_sc.uc_stack.ss_size = td->td_sigstk.ss_size; 466 frame.sf_sc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) 467 ? ((oonstack) ? LINUX_SS_ONSTACK : 0) : LINUX_SS_DISABLE; 468 PROC_UNLOCK(p); 469 470 bsd_to_linux_sigset(mask, &frame.sf_sc.uc_sigmask); 471 472 frame.sf_sc.uc_mcontext.sc_mask = frame.sf_sc.uc_sigmask.__bits[0]; 473 frame.sf_sc.uc_mcontext.sc_gs = rgs(); 474 frame.sf_sc.uc_mcontext.sc_fs = regs->tf_fs; 475 frame.sf_sc.uc_mcontext.sc_es = regs->tf_es; 476 frame.sf_sc.uc_mcontext.sc_ds = regs->tf_ds; 477 frame.sf_sc.uc_mcontext.sc_edi = regs->tf_edi; 478 frame.sf_sc.uc_mcontext.sc_esi = regs->tf_esi; 479 frame.sf_sc.uc_mcontext.sc_ebp = regs->tf_ebp; 480 frame.sf_sc.uc_mcontext.sc_ebx = regs->tf_ebx; 481 frame.sf_sc.uc_mcontext.sc_edx = regs->tf_edx; 482 frame.sf_sc.uc_mcontext.sc_ecx = regs->tf_ecx; 483 frame.sf_sc.uc_mcontext.sc_eax = regs->tf_eax; 484 frame.sf_sc.uc_mcontext.sc_eip = regs->tf_eip; 485 frame.sf_sc.uc_mcontext.sc_cs = regs->tf_cs; 486 frame.sf_sc.uc_mcontext.sc_eflags = regs->tf_eflags; 487 frame.sf_sc.uc_mcontext.sc_esp_at_signal = regs->tf_esp; 488 frame.sf_sc.uc_mcontext.sc_ss = regs->tf_ss; 489 frame.sf_sc.uc_mcontext.sc_err = regs->tf_err; 490 frame.sf_sc.uc_mcontext.sc_cr2 = (register_t)ksi->ksi_addr; 491 frame.sf_sc.uc_mcontext.sc_trapno = bsd_to_linux_trapcode(code); 492 493#ifdef DEBUG 494 if (ldebug(rt_sendsig)) 495 printf(LMSG("rt_sendsig flags: 0x%x, sp: %p, ss: 0x%x, mask: 0x%x"), 496 frame.sf_sc.uc_stack.ss_flags, td->td_sigstk.ss_sp, 497 td->td_sigstk.ss_size, frame.sf_sc.uc_mcontext.sc_mask); 498#endif 499 500 if (copyout(&frame, fp, sizeof(frame)) != 0) { 501 /* 502 * Process has trashed its stack; give it an illegal 503 * instruction to halt it in its tracks. 504 */ 505#ifdef DEBUG 506 if (ldebug(rt_sendsig)) 507 printf(LMSG("rt_sendsig: bad stack %p, oonstack=%x"), 508 fp, oonstack); 509#endif 510 PROC_LOCK(p); 511 sigexit(td, SIGILL); 512 } 513 514 /* 515 * Build context to run handler in. 516 */ 517 regs->tf_esp = (int)fp; 518 regs->tf_eip = p->p_sysent->sv_sigcode_base + linux_sznonrtsigcode; 519 regs->tf_eflags &= ~(PSL_T | PSL_VM | PSL_D); 520 regs->tf_cs = _ucodesel; 521 regs->tf_ds = _udatasel; 522 regs->tf_es = _udatasel; 523 regs->tf_fs = _udatasel; 524 regs->tf_ss = _udatasel; 525 PROC_LOCK(p); 526 mtx_lock(&psp->ps_mtx); 527} 528 529 530/* 531 * Send an interrupt to process. 532 * 533 * Stack is set up to allow sigcode stored 534 * in u. to call routine, followed by kcall 535 * to sigreturn routine below. After sigreturn 536 * resets the signal mask, the stack, and the 537 * frame pointer, it returns to the user 538 * specified pc, psl. 539 */ 540static void 541linux_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask) 542{ 543 struct thread *td = curthread; 544 struct proc *p = td->td_proc; 545 struct sigacts *psp; 546 struct trapframe *regs; 547 struct l_sigframe *fp, frame; 548 l_sigset_t lmask; 549 int sig, code; 550 int oonstack, i; 551 552 PROC_LOCK_ASSERT(p, MA_OWNED); 553 psp = p->p_sigacts; 554 sig = ksi->ksi_signo; 555 code = ksi->ksi_code; 556 mtx_assert(&psp->ps_mtx, MA_OWNED); 557 if (SIGISMEMBER(psp->ps_siginfo, sig)) { 558 /* Signal handler installed with SA_SIGINFO. */ 559 linux_rt_sendsig(catcher, ksi, mask); 560 return; 561 } 562 regs = td->td_frame; 563 oonstack = sigonstack(regs->tf_esp); 564 565#ifdef DEBUG 566 if (ldebug(sendsig)) 567 printf(ARGS(sendsig, "%p, %d, %p, %u"), 568 catcher, sig, (void*)mask, code); 569#endif 570 571 /* 572 * Allocate space for the signal handler context. 573 */ 574 if ((td->td_pflags & TDP_ALTSTACK) && !oonstack && 575 SIGISMEMBER(psp->ps_sigonstack, sig)) { 576 fp = (struct l_sigframe *)(td->td_sigstk.ss_sp + 577 td->td_sigstk.ss_size - sizeof(struct l_sigframe)); 578 } else 579 fp = (struct l_sigframe *)regs->tf_esp - 1; 580 mtx_unlock(&psp->ps_mtx); 581 PROC_UNLOCK(p); 582 583 /* 584 * Build the argument list for the signal handler. 585 */ 586 if (p->p_sysent->sv_sigtbl) 587 if (sig <= p->p_sysent->sv_sigsize) 588 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)]; 589 590 bzero(&frame, sizeof(frame)); 591 592 frame.sf_handler = catcher; 593 frame.sf_sig = sig; 594 595 bsd_to_linux_sigset(mask, &lmask); 596 597 /* 598 * Build the signal context to be used by sigreturn. 599 */ 600 frame.sf_sc.sc_mask = lmask.__bits[0]; 601 frame.sf_sc.sc_gs = rgs(); 602 frame.sf_sc.sc_fs = regs->tf_fs; 603 frame.sf_sc.sc_es = regs->tf_es; 604 frame.sf_sc.sc_ds = regs->tf_ds; 605 frame.sf_sc.sc_edi = regs->tf_edi; 606 frame.sf_sc.sc_esi = regs->tf_esi; 607 frame.sf_sc.sc_ebp = regs->tf_ebp; 608 frame.sf_sc.sc_ebx = regs->tf_ebx; 609 frame.sf_sc.sc_edx = regs->tf_edx; 610 frame.sf_sc.sc_ecx = regs->tf_ecx; 611 frame.sf_sc.sc_eax = regs->tf_eax; 612 frame.sf_sc.sc_eip = regs->tf_eip; 613 frame.sf_sc.sc_cs = regs->tf_cs; 614 frame.sf_sc.sc_eflags = regs->tf_eflags; 615 frame.sf_sc.sc_esp_at_signal = regs->tf_esp; 616 frame.sf_sc.sc_ss = regs->tf_ss; 617 frame.sf_sc.sc_err = regs->tf_err; 618 frame.sf_sc.sc_cr2 = (register_t)ksi->ksi_addr; 619 frame.sf_sc.sc_trapno = bsd_to_linux_trapcode(ksi->ksi_trapno); 620 621 for (i = 0; i < (LINUX_NSIG_WORDS-1); i++) 622 frame.sf_extramask[i] = lmask.__bits[i+1]; 623 624 if (copyout(&frame, fp, sizeof(frame)) != 0) { 625 /* 626 * Process has trashed its stack; give it an illegal 627 * instruction to halt it in its tracks. 628 */ 629 PROC_LOCK(p); 630 sigexit(td, SIGILL); 631 } 632 633 /* 634 * Build context to run handler in. 635 */ 636 regs->tf_esp = (int)fp; 637 regs->tf_eip = p->p_sysent->sv_sigcode_base; 638 regs->tf_eflags &= ~(PSL_T | PSL_VM | PSL_D); 639 regs->tf_cs = _ucodesel; 640 regs->tf_ds = _udatasel; 641 regs->tf_es = _udatasel; 642 regs->tf_fs = _udatasel; 643 regs->tf_ss = _udatasel; 644 PROC_LOCK(p); 645 mtx_lock(&psp->ps_mtx); 646} 647 648/* 649 * System call to cleanup state after a signal 650 * has been taken. Reset signal mask and 651 * stack state from context left by sendsig (above). 652 * Return to previous pc and psl as specified by 653 * context left by sendsig. Check carefully to 654 * make sure that the user has not modified the 655 * psl to gain improper privileges or to cause 656 * a machine fault. 657 */ 658int 659linux_sigreturn(struct thread *td, struct linux_sigreturn_args *args) 660{ 661 struct l_sigframe frame; 662 struct trapframe *regs; 663 l_sigset_t lmask; 664 sigset_t bmask; 665 int eflags, i; 666 ksiginfo_t ksi; 667 668 regs = td->td_frame; 669 670#ifdef DEBUG 671 if (ldebug(sigreturn)) 672 printf(ARGS(sigreturn, "%p"), (void *)args->sfp); 673#endif 674 /* 675 * The trampoline code hands us the sigframe. 676 * It is unsafe to keep track of it ourselves, in the event that a 677 * program jumps out of a signal handler. 678 */ 679 if (copyin(args->sfp, &frame, sizeof(frame)) != 0) 680 return (EFAULT); 681 682 /* 683 * Check for security violations. 684 */ 685#define EFLAGS_SECURE(ef, oef) ((((ef) ^ (oef)) & ~PSL_USERCHANGE) == 0) 686 eflags = frame.sf_sc.sc_eflags; 687 if (!EFLAGS_SECURE(eflags, regs->tf_eflags)) 688 return(EINVAL); 689 690 /* 691 * Don't allow users to load a valid privileged %cs. Let the 692 * hardware check for invalid selectors, excess privilege in 693 * other selectors, invalid %eip's and invalid %esp's. 694 */ 695#define CS_SECURE(cs) (ISPL(cs) == SEL_UPL) 696 if (!CS_SECURE(frame.sf_sc.sc_cs)) { 697 ksiginfo_init_trap(&ksi); 698 ksi.ksi_signo = SIGBUS; 699 ksi.ksi_code = BUS_OBJERR; 700 ksi.ksi_trapno = T_PROTFLT; 701 ksi.ksi_addr = (void *)regs->tf_eip; 702 trapsignal(td, &ksi); 703 return(EINVAL); 704 } 705 706 lmask.__bits[0] = frame.sf_sc.sc_mask; 707 for (i = 0; i < (LINUX_NSIG_WORDS-1); i++) 708 lmask.__bits[i+1] = frame.sf_extramask[i]; 709 linux_to_bsd_sigset(&lmask, &bmask); 710 kern_sigprocmask(td, SIG_SETMASK, &bmask, NULL, 0); 711 712 /* 713 * Restore signal context. 714 */ 715 /* %gs was restored by the trampoline. */ 716 regs->tf_fs = frame.sf_sc.sc_fs; 717 regs->tf_es = frame.sf_sc.sc_es; 718 regs->tf_ds = frame.sf_sc.sc_ds; 719 regs->tf_edi = frame.sf_sc.sc_edi; 720 regs->tf_esi = frame.sf_sc.sc_esi; 721 regs->tf_ebp = frame.sf_sc.sc_ebp; 722 regs->tf_ebx = frame.sf_sc.sc_ebx; 723 regs->tf_edx = frame.sf_sc.sc_edx; 724 regs->tf_ecx = frame.sf_sc.sc_ecx; 725 regs->tf_eax = frame.sf_sc.sc_eax; 726 regs->tf_eip = frame.sf_sc.sc_eip; 727 regs->tf_cs = frame.sf_sc.sc_cs; 728 regs->tf_eflags = eflags; 729 regs->tf_esp = frame.sf_sc.sc_esp_at_signal; 730 regs->tf_ss = frame.sf_sc.sc_ss; 731 732 return (EJUSTRETURN); 733} 734 735/* 736 * System call to cleanup state after a signal 737 * has been taken. Reset signal mask and 738 * stack state from context left by rt_sendsig (above). 739 * Return to previous pc and psl as specified by 740 * context left by sendsig. Check carefully to 741 * make sure that the user has not modified the 742 * psl to gain improper privileges or to cause 743 * a machine fault. 744 */ 745int 746linux_rt_sigreturn(struct thread *td, struct linux_rt_sigreturn_args *args) 747{ 748 struct l_ucontext uc; 749 struct l_sigcontext *context; 750 sigset_t bmask; 751 l_stack_t *lss; 752 stack_t ss; 753 struct trapframe *regs; 754 int eflags; 755 ksiginfo_t ksi; 756 757 regs = td->td_frame; 758 759#ifdef DEBUG 760 if (ldebug(rt_sigreturn)) 761 printf(ARGS(rt_sigreturn, "%p"), (void *)args->ucp); 762#endif 763 /* 764 * The trampoline code hands us the ucontext. 765 * It is unsafe to keep track of it ourselves, in the event that a 766 * program jumps out of a signal handler. 767 */ 768 if (copyin(args->ucp, &uc, sizeof(uc)) != 0) 769 return (EFAULT); 770 771 context = &uc.uc_mcontext; 772 773 /* 774 * Check for security violations. 775 */ 776#define EFLAGS_SECURE(ef, oef) ((((ef) ^ (oef)) & ~PSL_USERCHANGE) == 0) 777 eflags = context->sc_eflags; 778 if (!EFLAGS_SECURE(eflags, regs->tf_eflags)) 779 return(EINVAL); 780 781 /* 782 * Don't allow users to load a valid privileged %cs. Let the 783 * hardware check for invalid selectors, excess privilege in 784 * other selectors, invalid %eip's and invalid %esp's. 785 */ 786#define CS_SECURE(cs) (ISPL(cs) == SEL_UPL) 787 if (!CS_SECURE(context->sc_cs)) { 788 ksiginfo_init_trap(&ksi); 789 ksi.ksi_signo = SIGBUS; 790 ksi.ksi_code = BUS_OBJERR; 791 ksi.ksi_trapno = T_PROTFLT; 792 ksi.ksi_addr = (void *)regs->tf_eip; 793 trapsignal(td, &ksi); 794 return(EINVAL); 795 } 796 797 linux_to_bsd_sigset(&uc.uc_sigmask, &bmask); 798 kern_sigprocmask(td, SIG_SETMASK, &bmask, NULL, 0); 799 800 /* 801 * Restore signal context 802 */ 803 /* %gs was restored by the trampoline. */ 804 regs->tf_fs = context->sc_fs; 805 regs->tf_es = context->sc_es; 806 regs->tf_ds = context->sc_ds; 807 regs->tf_edi = context->sc_edi; 808 regs->tf_esi = context->sc_esi; 809 regs->tf_ebp = context->sc_ebp; 810 regs->tf_ebx = context->sc_ebx; 811 regs->tf_edx = context->sc_edx; 812 regs->tf_ecx = context->sc_ecx; 813 regs->tf_eax = context->sc_eax; 814 regs->tf_eip = context->sc_eip; 815 regs->tf_cs = context->sc_cs; 816 regs->tf_eflags = eflags; 817 regs->tf_esp = context->sc_esp_at_signal; 818 regs->tf_ss = context->sc_ss; 819 820 /* 821 * call sigaltstack & ignore results.. 822 */ 823 lss = &uc.uc_stack; 824 ss.ss_sp = lss->ss_sp; 825 ss.ss_size = lss->ss_size; 826 ss.ss_flags = linux_to_bsd_sigaltstack(lss->ss_flags); 827 828#ifdef DEBUG 829 if (ldebug(rt_sigreturn)) 830 printf(LMSG("rt_sigret flags: 0x%x, sp: %p, ss: 0x%x, mask: 0x%x"), 831 ss.ss_flags, ss.ss_sp, ss.ss_size, context->sc_mask); 832#endif 833 (void)kern_sigaltstack(td, &ss, NULL); 834 835 return (EJUSTRETURN); 836} 837 838static int 839linux_fetch_syscall_args(struct thread *td, struct syscall_args *sa) 840{ 841 struct proc *p; 842 struct trapframe *frame; 843 844 p = td->td_proc; 845 frame = td->td_frame; 846 847 sa->code = frame->tf_eax; 848 sa->args[0] = frame->tf_ebx; 849 sa->args[1] = frame->tf_ecx; 850 sa->args[2] = frame->tf_edx; 851 sa->args[3] = frame->tf_esi; 852 sa->args[4] = frame->tf_edi; 853 sa->args[5] = frame->tf_ebp; /* Unconfirmed */ 854 855 if (sa->code >= p->p_sysent->sv_size) 856 sa->callp = &p->p_sysent->sv_table[0]; 857 else 858 sa->callp = &p->p_sysent->sv_table[sa->code]; 859 sa->narg = sa->callp->sy_narg; 860 861 td->td_retval[0] = 0; 862 td->td_retval[1] = frame->tf_edx; 863 864 return (0); 865} 866 867/* 868 * If a linux binary is exec'ing something, try this image activator 869 * first. We override standard shell script execution in order to 870 * be able to modify the interpreter path. We only do this if a linux 871 * binary is doing the exec, so we do not create an EXEC module for it. 872 */ 873static int exec_linux_imgact_try(struct image_params *iparams); 874 875static int 876exec_linux_imgact_try(struct image_params *imgp) 877{ 878 const char *head = (const char *)imgp->image_header; 879 char *rpath; 880 int error = -1; 881 882 /* 883 * The interpreter for shell scripts run from a linux binary needs 884 * to be located in /compat/linux if possible in order to recursively 885 * maintain linux path emulation. 886 */ 887 if (((const short *)head)[0] == SHELLMAGIC) { 888 /* 889 * Run our normal shell image activator. If it succeeds attempt 890 * to use the alternate path for the interpreter. If an alternate 891 * path is found, use our stringspace to store it. 892 */ 893 if ((error = exec_shell_imgact(imgp)) == 0) { 894 linux_emul_convpath(FIRST_THREAD_IN_PROC(imgp->proc), 895 imgp->interpreter_name, UIO_SYSSPACE, &rpath, 0, AT_FDCWD); 896 if (rpath != NULL) 897 imgp->args->fname_buf = 898 imgp->interpreter_name = rpath; 899 } 900 } 901 return (error); 902} 903 904/* 905 * exec_setregs may initialize some registers differently than Linux 906 * does, thus potentially confusing Linux binaries. If necessary, we 907 * override the exec_setregs default(s) here. 908 */ 909static void 910exec_linux_setregs(struct thread *td, struct image_params *imgp, u_long stack) 911{ 912 struct pcb *pcb = td->td_pcb; 913 914 exec_setregs(td, imgp, stack); 915 916 /* Linux sets %gs to 0, we default to _udatasel */ 917 pcb->pcb_gs = 0; 918 load_gs(0); 919 920 pcb->pcb_initial_npxcw = __LINUX_NPXCW__; 921} 922 923static void 924linux_get_machine(const char **dst) 925{ 926 927 switch (cpu_class) { 928 case CPUCLASS_686: 929 *dst = "i686"; 930 break; 931 case CPUCLASS_586: 932 *dst = "i586"; 933 break; 934 case CPUCLASS_486: 935 *dst = "i486"; 936 break; 937 default: 938 *dst = "i386"; 939 } 940} 941 942struct sysentvec linux_sysvec = { 943 .sv_size = LINUX_SYS_MAXSYSCALL, 944 .sv_table = linux_sysent, 945 .sv_mask = 0, 946 .sv_sigsize = LINUX_SIGTBLSZ, 947 .sv_sigtbl = bsd_to_linux_signal, 948 .sv_errsize = ELAST + 1, 949 .sv_errtbl = bsd_to_linux_errno, 950 .sv_transtrap = translate_traps, 951 .sv_fixup = linux_fixup, 952 .sv_sendsig = linux_sendsig, 953 .sv_sigcode = linux_sigcode, 954 .sv_szsigcode = &linux_szsigcode, 955 .sv_prepsyscall = NULL, 956 .sv_name = "Linux a.out", 957 .sv_coredump = NULL, 958 .sv_imgact_try = exec_linux_imgact_try, 959 .sv_minsigstksz = LINUX_MINSIGSTKSZ, 960 .sv_pagesize = PAGE_SIZE, 961 .sv_minuser = VM_MIN_ADDRESS, 962 .sv_maxuser = VM_MAXUSER_ADDRESS, 963 .sv_usrstack = LINUX_USRSTACK, 964 .sv_psstrings = PS_STRINGS, 965 .sv_stackprot = VM_PROT_ALL, 966 .sv_copyout_strings = exec_copyout_strings, 967 .sv_setregs = exec_linux_setregs, 968 .sv_fixlimit = NULL, 969 .sv_maxssiz = NULL, 970 .sv_flags = SV_ABI_LINUX | SV_AOUT | SV_IA32 | SV_ILP32, 971 .sv_set_syscall_retval = cpu_set_syscall_retval, 972 .sv_fetch_syscall_args = linux_fetch_syscall_args, 973 .sv_syscallnames = NULL, 974 .sv_shared_page_base = LINUX_SHAREDPAGE, 975 .sv_shared_page_len = PAGE_SIZE, 976 .sv_schedtail = linux_schedtail, 977}; 978INIT_SYSENTVEC(aout_sysvec, &linux_sysvec); 979 980struct sysentvec elf_linux_sysvec = { 981 .sv_size = LINUX_SYS_MAXSYSCALL, 982 .sv_table = linux_sysent, 983 .sv_mask = 0, 984 .sv_sigsize = LINUX_SIGTBLSZ, 985 .sv_sigtbl = bsd_to_linux_signal, 986 .sv_errsize = ELAST + 1, 987 .sv_errtbl = bsd_to_linux_errno, 988 .sv_transtrap = translate_traps, 989 .sv_fixup = elf_linux_fixup, 990 .sv_sendsig = linux_sendsig, 991 .sv_sigcode = linux_sigcode, 992 .sv_szsigcode = &linux_szsigcode, 993 .sv_prepsyscall = NULL, 994 .sv_name = "Linux ELF", 995 .sv_coredump = elf32_coredump, 996 .sv_imgact_try = exec_linux_imgact_try, 997 .sv_minsigstksz = LINUX_MINSIGSTKSZ, 998 .sv_pagesize = PAGE_SIZE, 999 .sv_minuser = VM_MIN_ADDRESS, 1000 .sv_maxuser = VM_MAXUSER_ADDRESS, 1001 .sv_usrstack = LINUX_USRSTACK, 1002 .sv_psstrings = LINUX_PS_STRINGS, 1003 .sv_stackprot = VM_PROT_ALL, 1004 .sv_copyout_strings = linux_copyout_strings, 1005 .sv_setregs = exec_linux_setregs, 1006 .sv_fixlimit = NULL, 1007 .sv_maxssiz = NULL, 1008 .sv_flags = SV_ABI_LINUX | SV_IA32 | SV_ILP32 | SV_SHP, 1009 .sv_set_syscall_retval = cpu_set_syscall_retval, 1010 .sv_fetch_syscall_args = linux_fetch_syscall_args, 1011 .sv_syscallnames = NULL, 1012 .sv_shared_page_base = LINUX_SHAREDPAGE, 1013 .sv_shared_page_len = PAGE_SIZE, 1014 .sv_schedtail = linux_schedtail, 1015}; 1016INIT_SYSENTVEC(elf_sysvec, &elf_linux_sysvec); 1017 1018static char GNU_ABI_VENDOR[] = "GNU"; 1019static int GNULINUX_ABI_DESC = 0; 1020 1021static boolean_t 1022linux_trans_osrel(const Elf_Note *note, int32_t *osrel) 1023{ 1024 const Elf32_Word *desc; 1025 uintptr_t p; 1026 1027 p = (uintptr_t)(note + 1); 1028 p += roundup2(note->n_namesz, sizeof(Elf32_Addr)); 1029 1030 desc = (const Elf32_Word *)p; 1031 if (desc[0] != GNULINUX_ABI_DESC) 1032 return (FALSE); 1033 1034 /* 1035 * For linux we encode osrel as follows (see linux_mib.c): 1036 * VVVMMMIII (version, major, minor), see linux_mib.c. 1037 */ 1038 *osrel = desc[1] * 1000000 + desc[2] * 1000 + desc[3]; 1039 1040 return (TRUE); 1041} 1042 1043static Elf_Brandnote linux_brandnote = { 1044 .hdr.n_namesz = sizeof(GNU_ABI_VENDOR), 1045 .hdr.n_descsz = 16, /* XXX at least 16 */ 1046 .hdr.n_type = 1, 1047 .vendor = GNU_ABI_VENDOR, 1048 .flags = BN_TRANSLATE_OSREL, 1049 .trans_osrel = linux_trans_osrel 1050}; 1051 1052static Elf32_Brandinfo linux_brand = { 1053 .brand = ELFOSABI_LINUX, 1054 .machine = EM_386, 1055 .compat_3_brand = "Linux", 1056 .emul_path = "/compat/linux", 1057 .interp_path = "/lib/ld-linux.so.1", 1058 .sysvec = &elf_linux_sysvec, 1059 .interp_newpath = NULL, 1060 .brand_note = &linux_brandnote, 1061 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 1062}; 1063 1064static Elf32_Brandinfo linux_glibc2brand = { 1065 .brand = ELFOSABI_LINUX, 1066 .machine = EM_386, 1067 .compat_3_brand = "Linux", 1068 .emul_path = "/compat/linux", 1069 .interp_path = "/lib/ld-linux.so.2", 1070 .sysvec = &elf_linux_sysvec, 1071 .interp_newpath = NULL, 1072 .brand_note = &linux_brandnote, 1073 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE 1074}; 1075 1076Elf32_Brandinfo *linux_brandlist[] = { 1077 &linux_brand, 1078 &linux_glibc2brand, 1079 NULL 1080}; 1081 1082static int 1083linux_elf_modevent(module_t mod, int type, void *data) 1084{ 1085 Elf32_Brandinfo **brandinfo; 1086 int error; 1087 struct linux_ioctl_handler **lihp; 1088 struct linux_device_handler **ldhp; 1089 1090 error = 0; 1091 1092 switch(type) { 1093 case MOD_LOAD: 1094 for (brandinfo = &linux_brandlist[0]; *brandinfo != NULL; 1095 ++brandinfo) 1096 if (elf32_insert_brand_entry(*brandinfo) < 0) 1097 error = EINVAL; 1098 if (error == 0) { 1099 SET_FOREACH(lihp, linux_ioctl_handler_set) 1100 linux_ioctl_register_handler(*lihp); 1101 SET_FOREACH(ldhp, linux_device_handler_set) 1102 linux_device_register_handler(*ldhp); 1103 mtx_init(&emul_lock, "emuldata lock", NULL, MTX_DEF); 1104 sx_init(&emul_shared_lock, "emuldata->shared lock"); 1105 LIST_INIT(&futex_list); 1106 mtx_init(&futex_mtx, "ftllk", NULL, MTX_DEF); 1107 linux_exit_tag = EVENTHANDLER_REGISTER(process_exit, linux_proc_exit, 1108 NULL, 1000); 1109 linux_exec_tag = EVENTHANDLER_REGISTER(process_exec, linux_proc_exec, 1110 NULL, 1000); 1111 linux_get_machine(&linux_platform); 1112 linux_szplatform = roundup(strlen(linux_platform) + 1, 1113 sizeof(char *)); 1114 linux_osd_jail_register(); 1115 stclohz = (stathz ? stathz : hz); 1116 if (bootverbose) 1117 printf("Linux ELF exec handler installed\n"); 1118 } else 1119 printf("cannot insert Linux ELF brand handler\n"); 1120 break; 1121 case MOD_UNLOAD: 1122 for (brandinfo = &linux_brandlist[0]; *brandinfo != NULL; 1123 ++brandinfo) 1124 if (elf32_brand_inuse(*brandinfo)) 1125 error = EBUSY; 1126 if (error == 0) { 1127 for (brandinfo = &linux_brandlist[0]; 1128 *brandinfo != NULL; ++brandinfo) 1129 if (elf32_remove_brand_entry(*brandinfo) < 0) 1130 error = EINVAL; 1131 } 1132 if (error == 0) { 1133 SET_FOREACH(lihp, linux_ioctl_handler_set) 1134 linux_ioctl_unregister_handler(*lihp); 1135 SET_FOREACH(ldhp, linux_device_handler_set) 1136 linux_device_unregister_handler(*ldhp); 1137 mtx_destroy(&emul_lock); 1138 sx_destroy(&emul_shared_lock); 1139 mtx_destroy(&futex_mtx); 1140 EVENTHANDLER_DEREGISTER(process_exit, linux_exit_tag); 1141 EVENTHANDLER_DEREGISTER(process_exec, linux_exec_tag); 1142 linux_osd_jail_deregister(); 1143 if (bootverbose) 1144 printf("Linux ELF exec handler removed\n"); 1145 } else 1146 printf("Could not deinstall ELF interpreter entry\n"); 1147 break; 1148 default: 1149 return EOPNOTSUPP; 1150 } 1151 return error; 1152} 1153 1154static moduledata_t linux_elf_mod = { 1155 "linuxelf", 1156 linux_elf_modevent, 1157 0 1158}; 1159 1160DECLARE_MODULE_TIED(linuxelf, linux_elf_mod, SI_SUB_EXEC, SI_ORDER_ANY); 1161