1 /*-
2 * Copyright (c) 1994-1996 Søren 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: releng/10.2/sys/i386/linux/linux_sysvec.c 294904 2016-01-27 07:41:31Z delphij $");
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
75 MODULE_VERSION(linux, 1);
76
77 MALLOC_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
96 extern char linux_sigcode[];
97 extern int linux_szsigcode;
98
99 extern struct sysent linux_sysent[LINUX_SYS_MAXSYSCALL];
100
101 SET_DECLARE(linux_ioctl_handler_set, struct linux_ioctl_handler);
102 SET_DECLARE(linux_device_handler_set, struct linux_device_handler);
103
104 static int linux_fixup(register_t **stack_base,
105 struct image_params *iparams);
106 static int elf_linux_fixup(register_t **stack_base,
107 struct image_params *iparams);
108 static void linux_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask);
109 static void exec_linux_setregs(struct thread *td,
110 struct image_params *imgp, u_long stack);
111 static register_t *linux_copyout_strings(struct image_params *imgp);
112 static boolean_t linux_trans_osrel(const Elf_Note *note, int32_t *osrel);
113
114 static int linux_szplatform;
115 const char *linux_platform;
116
117 static eventhandler_tag linux_exit_tag;
118 static 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 */
127 static 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
140 int 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
151 int 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
163 static 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 */
207 static int
208 translate_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
223 static int
224 linux_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
239 static int
240 elf_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 int issetugid;
248
249 KASSERT(curthread->td_proc == imgp->proc,
250 ("unsafe elf_linux_fixup(), should be curproc"));
251
252 p = imgp->proc;
253 issetugid = imgp->proc->p_flag & P_SUGID ? 1 : 0;
254 arginfo = (struct ps_strings *)p->p_sysent->sv_psstrings;
255 uplatform = (Elf32_Addr *)((caddr_t)arginfo - linux_szplatform);
256 args = (Elf32_Auxargs *)imgp->auxargs;
257 pos = *stack_base + (imgp->args->argc + imgp->args->envc + 2);
258
259 AUXARGS_ENTRY(pos, LINUX_AT_HWCAP, cpu_feature);
260
261 /*
262 * Do not export AT_CLKTCK when emulating Linux kernel prior to 2.4.0,
263 * as it has appeared in the 2.4.0-rc7 first time.
264 * Being exported, AT_CLKTCK is returned by sysconf(_SC_CLK_TCK),
265 * glibc falls back to the hard-coded CLK_TCK value when aux entry
266 * is not present.
267 * Also see linux_times() implementation.
268 */
269 if (linux_kernver(curthread) >= LINUX_KERNVER_2004000)
270 AUXARGS_ENTRY(pos, LINUX_AT_CLKTCK, stclohz);
271 AUXARGS_ENTRY(pos, AT_PHDR, args->phdr);
272 AUXARGS_ENTRY(pos, AT_PHENT, args->phent);
273 AUXARGS_ENTRY(pos, AT_PHNUM, args->phnum);
274 AUXARGS_ENTRY(pos, AT_PAGESZ, args->pagesz);
275 AUXARGS_ENTRY(pos, AT_FLAGS, args->flags);
276 AUXARGS_ENTRY(pos, AT_ENTRY, args->entry);
277 AUXARGS_ENTRY(pos, AT_BASE, args->base);
278 AUXARGS_ENTRY(pos, LINUX_AT_SECURE, issetugid);
279 AUXARGS_ENTRY(pos, AT_UID, imgp->proc->p_ucred->cr_ruid);
280 AUXARGS_ENTRY(pos, AT_EUID, imgp->proc->p_ucred->cr_svuid);
281 AUXARGS_ENTRY(pos, AT_GID, imgp->proc->p_ucred->cr_rgid);
282 AUXARGS_ENTRY(pos, AT_EGID, imgp->proc->p_ucred->cr_svgid);
283 AUXARGS_ENTRY(pos, LINUX_AT_PLATFORM, PTROUT(uplatform));
284 if (args->execfd != -1)
285 AUXARGS_ENTRY(pos, AT_EXECFD, args->execfd);
286 AUXARGS_ENTRY(pos, AT_NULL, 0);
287
288 free(imgp->auxargs, M_TEMP);
289 imgp->auxargs = NULL;
290
291 (*stack_base)--;
292 suword(*stack_base, (register_t)imgp->args->argc);
293 return (0);
294 }
295
296 /*
297 * Copied from kern/kern_exec.c
298 */
299 static register_t *
300 linux_copyout_strings(struct image_params *imgp)
301 {
302 int argc, envc;
303 char **vectp;
304 char *stringp, *destp;
305 register_t *stack_base;
306 struct ps_strings *arginfo;
307 struct proc *p;
308
309 /*
310 * Calculate string base and vector table pointers.
311 * Also deal with signal trampoline code for this exec type.
312 */
313 p = imgp->proc;
314 arginfo = (struct ps_strings *)p->p_sysent->sv_psstrings;
315 destp = (caddr_t)arginfo - SPARE_USRSPACE - linux_szplatform -
316 roundup((ARG_MAX - imgp->args->stringspace), sizeof(char *));
317
318 /*
319 * install LINUX_PLATFORM
320 */
321 copyout(linux_platform, ((caddr_t)arginfo - linux_szplatform),
322 linux_szplatform);
323
324 /*
325 * If we have a valid auxargs ptr, prepare some room
326 * on the stack.
327 */
328 if (imgp->auxargs) {
329 /*
330 * 'AT_COUNT*2' is size for the ELF Auxargs data. This is for
331 * lower compatibility.
332 */
333 imgp->auxarg_size = (imgp->auxarg_size) ? imgp->auxarg_size :
334 (LINUX_AT_COUNT * 2);
335 /*
336 * The '+ 2' is for the null pointers at the end of each of
337 * the arg and env vector sets,and imgp->auxarg_size is room
338 * for argument of Runtime loader.
339 */
340 vectp = (char **)(destp - (imgp->args->argc +
341 imgp->args->envc + 2 + imgp->auxarg_size) * sizeof(char *));
342 } else {
343 /*
344 * The '+ 2' is for the null pointers at the end of each of
345 * the arg and env vector sets
346 */
347 vectp = (char **)(destp - (imgp->args->argc + imgp->args->envc + 2) *
348 sizeof(char *));
349 }
350
351 /*
352 * vectp also becomes our initial stack base
353 */
354 stack_base = (register_t *)vectp;
355
356 stringp = imgp->args->begin_argv;
357 argc = imgp->args->argc;
358 envc = imgp->args->envc;
359
360 /*
361 * Copy out strings - arguments and environment.
362 */
363 copyout(stringp, destp, ARG_MAX - imgp->args->stringspace);
364
365 /*
366 * Fill in "ps_strings" struct for ps, w, etc.
367 */
368 suword(&arginfo->ps_argvstr, (long)(intptr_t)vectp);
369 suword(&arginfo->ps_nargvstr, argc);
370
371 /*
372 * Fill in argument portion of vector table.
373 */
374 for (; argc > 0; --argc) {
375 suword(vectp++, (long)(intptr_t)destp);
376 while (*stringp++ != 0)
377 destp++;
378 destp++;
379 }
380
381 /* a null vector table pointer separates the argp's from the envp's */
382 suword(vectp++, 0);
383
384 suword(&arginfo->ps_envstr, (long)(intptr_t)vectp);
385 suword(&arginfo->ps_nenvstr, envc);
386
387 /*
388 * Fill in environment portion of vector table.
389 */
390 for (; envc > 0; --envc) {
391 suword(vectp++, (long)(intptr_t)destp);
392 while (*stringp++ != 0)
393 destp++;
394 destp++;
395 }
396
397 /* end of vector table is a null pointer */
398 suword(vectp, 0);
399
400 return (stack_base);
401 }
402
403
404
405 extern unsigned long linux_sznonrtsigcode;
406
407 static void
408 linux_rt_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
409 {
410 struct thread *td = curthread;
411 struct proc *p = td->td_proc;
412 struct sigacts *psp;
413 struct trapframe *regs;
414 struct l_rt_sigframe *fp, frame;
415 int sig, code;
416 int oonstack;
417
418 sig = ksi->ksi_signo;
419 code = ksi->ksi_code;
420 PROC_LOCK_ASSERT(p, MA_OWNED);
421 psp = p->p_sigacts;
422 mtx_assert(&psp->ps_mtx, MA_OWNED);
423 regs = td->td_frame;
424 oonstack = sigonstack(regs->tf_esp);
425
426 #ifdef DEBUG
427 if (ldebug(rt_sendsig))
428 printf(ARGS(rt_sendsig, "%p, %d, %p, %u"),
429 catcher, sig, (void*)mask, code);
430 #endif
431 /*
432 * Allocate space for the signal handler context.
433 */
434 if ((td->td_pflags & TDP_ALTSTACK) && !oonstack &&
435 SIGISMEMBER(psp->ps_sigonstack, sig)) {
436 fp = (struct l_rt_sigframe *)(td->td_sigstk.ss_sp +
437 td->td_sigstk.ss_size - sizeof(struct l_rt_sigframe));
438 } else
439 fp = (struct l_rt_sigframe *)regs->tf_esp - 1;
440 mtx_unlock(&psp->ps_mtx);
441
442 /*
443 * Build the argument list for the signal handler.
444 */
445 if (p->p_sysent->sv_sigtbl)
446 if (sig <= p->p_sysent->sv_sigsize)
447 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)];
448
449 bzero(&frame, sizeof(frame));
450
451 frame.sf_handler = catcher;
452 frame.sf_sig = sig;
453 frame.sf_siginfo = &fp->sf_si;
454 frame.sf_ucontext = &fp->sf_sc;
455
456 /* Fill in POSIX parts */
457 ksiginfo_to_lsiginfo(ksi, &frame.sf_si, sig);
458
459 /*
460 * Build the signal context to be used by sigreturn.
461 */
462 frame.sf_sc.uc_flags = 0; /* XXX ??? */
463 frame.sf_sc.uc_link = NULL; /* XXX ??? */
464
465 frame.sf_sc.uc_stack.ss_sp = td->td_sigstk.ss_sp;
466 frame.sf_sc.uc_stack.ss_size = td->td_sigstk.ss_size;
467 frame.sf_sc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK)
468 ? ((oonstack) ? LINUX_SS_ONSTACK : 0) : LINUX_SS_DISABLE;
469 PROC_UNLOCK(p);
470
471 bsd_to_linux_sigset(mask, &frame.sf_sc.uc_sigmask);
472
473 frame.sf_sc.uc_mcontext.sc_mask = frame.sf_sc.uc_sigmask.__bits[0];
474 frame.sf_sc.uc_mcontext.sc_gs = rgs();
475 frame.sf_sc.uc_mcontext.sc_fs = regs->tf_fs;
476 frame.sf_sc.uc_mcontext.sc_es = regs->tf_es;
477 frame.sf_sc.uc_mcontext.sc_ds = regs->tf_ds;
478 frame.sf_sc.uc_mcontext.sc_edi = regs->tf_edi;
479 frame.sf_sc.uc_mcontext.sc_esi = regs->tf_esi;
480 frame.sf_sc.uc_mcontext.sc_ebp = regs->tf_ebp;
481 frame.sf_sc.uc_mcontext.sc_ebx = regs->tf_ebx;
482 frame.sf_sc.uc_mcontext.sc_edx = regs->tf_edx;
483 frame.sf_sc.uc_mcontext.sc_ecx = regs->tf_ecx;
484 frame.sf_sc.uc_mcontext.sc_eax = regs->tf_eax;
485 frame.sf_sc.uc_mcontext.sc_eip = regs->tf_eip;
486 frame.sf_sc.uc_mcontext.sc_cs = regs->tf_cs;
487 frame.sf_sc.uc_mcontext.sc_eflags = regs->tf_eflags;
488 frame.sf_sc.uc_mcontext.sc_esp_at_signal = regs->tf_esp;
489 frame.sf_sc.uc_mcontext.sc_ss = regs->tf_ss;
490 frame.sf_sc.uc_mcontext.sc_err = regs->tf_err;
491 frame.sf_sc.uc_mcontext.sc_cr2 = (register_t)ksi->ksi_addr;
492 frame.sf_sc.uc_mcontext.sc_trapno = bsd_to_linux_trapcode(code);
493
494 #ifdef DEBUG
495 if (ldebug(rt_sendsig))
496 printf(LMSG("rt_sendsig flags: 0x%x, sp: %p, ss: 0x%x, mask: 0x%x"),
497 frame.sf_sc.uc_stack.ss_flags, td->td_sigstk.ss_sp,
498 td->td_sigstk.ss_size, frame.sf_sc.uc_mcontext.sc_mask);
499 #endif
500
501 if (copyout(&frame, fp, sizeof(frame)) != 0) {
502 /*
503 * Process has trashed its stack; give it an illegal
504 * instruction to halt it in its tracks.
505 */
506 #ifdef DEBUG
507 if (ldebug(rt_sendsig))
508 printf(LMSG("rt_sendsig: bad stack %p, oonstack=%x"),
509 fp, oonstack);
510 #endif
511 PROC_LOCK(p);
512 sigexit(td, SIGILL);
513 }
514
515 /*
516 * Build context to run handler in.
517 */
518 regs->tf_esp = (int)fp;
519 regs->tf_eip = p->p_sysent->sv_sigcode_base + linux_sznonrtsigcode;
520 regs->tf_eflags &= ~(PSL_T | PSL_VM | PSL_D);
521 regs->tf_cs = _ucodesel;
522 regs->tf_ds = _udatasel;
523 regs->tf_es = _udatasel;
524 regs->tf_fs = _udatasel;
525 regs->tf_ss = _udatasel;
526 PROC_LOCK(p);
527 mtx_lock(&psp->ps_mtx);
528 }
529
530
531 /*
532 * Send an interrupt to process.
533 *
534 * Stack is set up to allow sigcode stored
535 * in u. to call routine, followed by kcall
536 * to sigreturn routine below. After sigreturn
537 * resets the signal mask, the stack, and the
538 * frame pointer, it returns to the user
539 * specified pc, psl.
540 */
541 static void
542 linux_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
543 {
544 struct thread *td = curthread;
545 struct proc *p = td->td_proc;
546 struct sigacts *psp;
547 struct trapframe *regs;
548 struct l_sigframe *fp, frame;
549 l_sigset_t lmask;
550 int sig, code;
551 int oonstack, i;
552
553 PROC_LOCK_ASSERT(p, MA_OWNED);
554 psp = p->p_sigacts;
555 sig = ksi->ksi_signo;
556 code = ksi->ksi_code;
557 mtx_assert(&psp->ps_mtx, MA_OWNED);
558 if (SIGISMEMBER(psp->ps_siginfo, sig)) {
559 /* Signal handler installed with SA_SIGINFO. */
560 linux_rt_sendsig(catcher, ksi, mask);
561 return;
562 }
563 regs = td->td_frame;
564 oonstack = sigonstack(regs->tf_esp);
565
566 #ifdef DEBUG
567 if (ldebug(sendsig))
568 printf(ARGS(sendsig, "%p, %d, %p, %u"),
569 catcher, sig, (void*)mask, code);
570 #endif
571
572 /*
573 * Allocate space for the signal handler context.
574 */
575 if ((td->td_pflags & TDP_ALTSTACK) && !oonstack &&
576 SIGISMEMBER(psp->ps_sigonstack, sig)) {
577 fp = (struct l_sigframe *)(td->td_sigstk.ss_sp +
578 td->td_sigstk.ss_size - sizeof(struct l_sigframe));
579 } else
580 fp = (struct l_sigframe *)regs->tf_esp - 1;
581 mtx_unlock(&psp->ps_mtx);
582 PROC_UNLOCK(p);
583
584 /*
585 * Build the argument list for the signal handler.
586 */
587 if (p->p_sysent->sv_sigtbl)
588 if (sig <= p->p_sysent->sv_sigsize)
589 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)];
590
591 bzero(&frame, sizeof(frame));
592
593 frame.sf_handler = catcher;
594 frame.sf_sig = sig;
595
596 bsd_to_linux_sigset(mask, &lmask);
597
598 /*
599 * Build the signal context to be used by sigreturn.
600 */
601 frame.sf_sc.sc_mask = lmask.__bits[0];
602 frame.sf_sc.sc_gs = rgs();
603 frame.sf_sc.sc_fs = regs->tf_fs;
604 frame.sf_sc.sc_es = regs->tf_es;
605 frame.sf_sc.sc_ds = regs->tf_ds;
606 frame.sf_sc.sc_edi = regs->tf_edi;
607 frame.sf_sc.sc_esi = regs->tf_esi;
608 frame.sf_sc.sc_ebp = regs->tf_ebp;
609 frame.sf_sc.sc_ebx = regs->tf_ebx;
610 frame.sf_sc.sc_edx = regs->tf_edx;
611 frame.sf_sc.sc_ecx = regs->tf_ecx;
612 frame.sf_sc.sc_eax = regs->tf_eax;
613 frame.sf_sc.sc_eip = regs->tf_eip;
614 frame.sf_sc.sc_cs = regs->tf_cs;
615 frame.sf_sc.sc_eflags = regs->tf_eflags;
616 frame.sf_sc.sc_esp_at_signal = regs->tf_esp;
617 frame.sf_sc.sc_ss = regs->tf_ss;
618 frame.sf_sc.sc_err = regs->tf_err;
619 frame.sf_sc.sc_cr2 = (register_t)ksi->ksi_addr;
620 frame.sf_sc.sc_trapno = bsd_to_linux_trapcode(ksi->ksi_trapno);
621
622 for (i = 0; i < (LINUX_NSIG_WORDS-1); i++)
623 frame.sf_extramask[i] = lmask.__bits[i+1];
624
625 if (copyout(&frame, fp, sizeof(frame)) != 0) {
626 /*
627 * Process has trashed its stack; give it an illegal
628 * instruction to halt it in its tracks.
629 */
630 PROC_LOCK(p);
631 sigexit(td, SIGILL);
632 }
633
634 /*
635 * Build context to run handler in.
636 */
637 regs->tf_esp = (int)fp;
638 regs->tf_eip = p->p_sysent->sv_sigcode_base;
639 regs->tf_eflags &= ~(PSL_T | PSL_VM | PSL_D);
640 regs->tf_cs = _ucodesel;
641 regs->tf_ds = _udatasel;
642 regs->tf_es = _udatasel;
643 regs->tf_fs = _udatasel;
644 regs->tf_ss = _udatasel;
645 PROC_LOCK(p);
646 mtx_lock(&psp->ps_mtx);
647 }
648
649 /*
650 * System call to cleanup state after a signal
651 * has been taken. Reset signal mask and
652 * stack state from context left by sendsig (above).
653 * Return to previous pc and psl as specified by
654 * context left by sendsig. Check carefully to
655 * make sure that the user has not modified the
656 * psl to gain improper privileges or to cause
657 * a machine fault.
658 */
659 int
660 linux_sigreturn(struct thread *td, struct linux_sigreturn_args *args)
661 {
662 struct l_sigframe frame;
663 struct trapframe *regs;
664 l_sigset_t lmask;
665 sigset_t bmask;
666 int eflags, i;
667 ksiginfo_t ksi;
668
669 regs = td->td_frame;
670
671 #ifdef DEBUG
672 if (ldebug(sigreturn))
673 printf(ARGS(sigreturn, "%p"), (void *)args->sfp);
674 #endif
675 /*
676 * The trampoline code hands us the sigframe.
677 * It is unsafe to keep track of it ourselves, in the event that a
678 * program jumps out of a signal handler.
679 */
680 if (copyin(args->sfp, &frame, sizeof(frame)) != 0)
681 return (EFAULT);
682
683 /*
684 * Check for security violations.
685 */
686 #define EFLAGS_SECURE(ef, oef) ((((ef) ^ (oef)) & ~PSL_USERCHANGE) == 0)
687 eflags = frame.sf_sc.sc_eflags;
688 if (!EFLAGS_SECURE(eflags, regs->tf_eflags))
689 return(EINVAL);
690
691 /*
692 * Don't allow users to load a valid privileged %cs. Let the
693 * hardware check for invalid selectors, excess privilege in
694 * other selectors, invalid %eip's and invalid %esp's.
695 */
696 #define CS_SECURE(cs) (ISPL(cs) == SEL_UPL)
697 if (!CS_SECURE(frame.sf_sc.sc_cs)) {
698 ksiginfo_init_trap(&ksi);
699 ksi.ksi_signo = SIGBUS;
700 ksi.ksi_code = BUS_OBJERR;
701 ksi.ksi_trapno = T_PROTFLT;
702 ksi.ksi_addr = (void *)regs->tf_eip;
703 trapsignal(td, &ksi);
704 return(EINVAL);
705 }
706
707 lmask.__bits[0] = frame.sf_sc.sc_mask;
708 for (i = 0; i < (LINUX_NSIG_WORDS-1); i++)
709 lmask.__bits[i+1] = frame.sf_extramask[i];
710 linux_to_bsd_sigset(&lmask, &bmask);
711 kern_sigprocmask(td, SIG_SETMASK, &bmask, NULL, 0);
712
713 /*
714 * Restore signal context.
715 */
716 /* %gs was restored by the trampoline. */
717 regs->tf_fs = frame.sf_sc.sc_fs;
718 regs->tf_es = frame.sf_sc.sc_es;
719 regs->tf_ds = frame.sf_sc.sc_ds;
720 regs->tf_edi = frame.sf_sc.sc_edi;
721 regs->tf_esi = frame.sf_sc.sc_esi;
722 regs->tf_ebp = frame.sf_sc.sc_ebp;
723 regs->tf_ebx = frame.sf_sc.sc_ebx;
724 regs->tf_edx = frame.sf_sc.sc_edx;
725 regs->tf_ecx = frame.sf_sc.sc_ecx;
726 regs->tf_eax = frame.sf_sc.sc_eax;
727 regs->tf_eip = frame.sf_sc.sc_eip;
728 regs->tf_cs = frame.sf_sc.sc_cs;
729 regs->tf_eflags = eflags;
730 regs->tf_esp = frame.sf_sc.sc_esp_at_signal;
731 regs->tf_ss = frame.sf_sc.sc_ss;
732
733 return (EJUSTRETURN);
734 }
735
736 /*
737 * System call to cleanup state after a signal
738 * has been taken. Reset signal mask and
739 * stack state from context left by rt_sendsig (above).
740 * Return to previous pc and psl as specified by
741 * context left by sendsig. Check carefully to
742 * make sure that the user has not modified the
743 * psl to gain improper privileges or to cause
744 * a machine fault.
745 */
746 int
747 linux_rt_sigreturn(struct thread *td, struct linux_rt_sigreturn_args *args)
748 {
749 struct l_ucontext uc;
750 struct l_sigcontext *context;
751 sigset_t bmask;
752 l_stack_t *lss;
753 stack_t ss;
754 struct trapframe *regs;
755 int eflags;
756 ksiginfo_t ksi;
757
758 regs = td->td_frame;
759
760 #ifdef DEBUG
761 if (ldebug(rt_sigreturn))
762 printf(ARGS(rt_sigreturn, "%p"), (void *)args->ucp);
763 #endif
764 /*
765 * The trampoline code hands us the ucontext.
766 * It is unsafe to keep track of it ourselves, in the event that a
767 * program jumps out of a signal handler.
768 */
769 if (copyin(args->ucp, &uc, sizeof(uc)) != 0)
770 return (EFAULT);
771
772 context = &uc.uc_mcontext;
773
774 /*
775 * Check for security violations.
776 */
777 #define EFLAGS_SECURE(ef, oef) ((((ef) ^ (oef)) & ~PSL_USERCHANGE) == 0)
778 eflags = context->sc_eflags;
779 if (!EFLAGS_SECURE(eflags, regs->tf_eflags))
780 return(EINVAL);
781
782 /*
783 * Don't allow users to load a valid privileged %cs. Let the
784 * hardware check for invalid selectors, excess privilege in
785 * other selectors, invalid %eip's and invalid %esp's.
786 */
787 #define CS_SECURE(cs) (ISPL(cs) == SEL_UPL)
788 if (!CS_SECURE(context->sc_cs)) {
789 ksiginfo_init_trap(&ksi);
790 ksi.ksi_signo = SIGBUS;
791 ksi.ksi_code = BUS_OBJERR;
792 ksi.ksi_trapno = T_PROTFLT;
793 ksi.ksi_addr = (void *)regs->tf_eip;
794 trapsignal(td, &ksi);
795 return(EINVAL);
796 }
797
798 linux_to_bsd_sigset(&uc.uc_sigmask, &bmask);
799 kern_sigprocmask(td, SIG_SETMASK, &bmask, NULL, 0);
800
801 /*
802 * Restore signal context
803 */
804 /* %gs was restored by the trampoline. */
805 regs->tf_fs = context->sc_fs;
806 regs->tf_es = context->sc_es;
807 regs->tf_ds = context->sc_ds;
808 regs->tf_edi = context->sc_edi;
809 regs->tf_esi = context->sc_esi;
810 regs->tf_ebp = context->sc_ebp;
811 regs->tf_ebx = context->sc_ebx;
812 regs->tf_edx = context->sc_edx;
813 regs->tf_ecx = context->sc_ecx;
814 regs->tf_eax = context->sc_eax;
815 regs->tf_eip = context->sc_eip;
816 regs->tf_cs = context->sc_cs;
817 regs->tf_eflags = eflags;
818 regs->tf_esp = context->sc_esp_at_signal;
819 regs->tf_ss = context->sc_ss;
820
821 /*
822 * call sigaltstack & ignore results..
823 */
824 lss = &uc.uc_stack;
825 ss.ss_sp = lss->ss_sp;
826 ss.ss_size = lss->ss_size;
827 ss.ss_flags = linux_to_bsd_sigaltstack(lss->ss_flags);
828
829 #ifdef DEBUG
830 if (ldebug(rt_sigreturn))
831 printf(LMSG("rt_sigret flags: 0x%x, sp: %p, ss: 0x%x, mask: 0x%x"),
832 ss.ss_flags, ss.ss_sp, ss.ss_size, context->sc_mask);
833 #endif
834 (void)kern_sigaltstack(td, &ss, NULL);
835
836 return (EJUSTRETURN);
837 }
838
839 static int
840 linux_fetch_syscall_args(struct thread *td, struct syscall_args *sa)
841 {
842 struct proc *p;
843 struct trapframe *frame;
844
845 p = td->td_proc;
846 frame = td->td_frame;
847
848 sa->code = frame->tf_eax;
849 sa->args[0] = frame->tf_ebx;
850 sa->args[1] = frame->tf_ecx;
851 sa->args[2] = frame->tf_edx;
852 sa->args[3] = frame->tf_esi;
853 sa->args[4] = frame->tf_edi;
854 sa->args[5] = frame->tf_ebp; /* Unconfirmed */
855
856 if (sa->code >= p->p_sysent->sv_size)
857 sa->callp = &p->p_sysent->sv_table[0];
858 else
859 sa->callp = &p->p_sysent->sv_table[sa->code];
860 sa->narg = sa->callp->sy_narg;
861
862 td->td_retval[0] = 0;
863 td->td_retval[1] = frame->tf_edx;
864
865 return (0);
866 }
867
868 /*
869 * If a linux binary is exec'ing something, try this image activator
870 * first. We override standard shell script execution in order to
871 * be able to modify the interpreter path. We only do this if a linux
872 * binary is doing the exec, so we do not create an EXEC module for it.
873 */
874 static int exec_linux_imgact_try(struct image_params *iparams);
875
876 static int
877 exec_linux_imgact_try(struct image_params *imgp)
878 {
879 const char *head = (const char *)imgp->image_header;
880 char *rpath;
881 int error = -1;
882
883 /*
884 * The interpreter for shell scripts run from a linux binary needs
885 * to be located in /compat/linux if possible in order to recursively
886 * maintain linux path emulation.
887 */
888 if (((const short *)head)[0] == SHELLMAGIC) {
889 /*
890 * Run our normal shell image activator. If it succeeds attempt
891 * to use the alternate path for the interpreter. If an alternate
892 * path is found, use our stringspace to store it.
893 */
894 if ((error = exec_shell_imgact(imgp)) == 0) {
895 linux_emul_convpath(FIRST_THREAD_IN_PROC(imgp->proc),
896 imgp->interpreter_name, UIO_SYSSPACE, &rpath, 0, AT_FDCWD);
897 if (rpath != NULL)
898 imgp->args->fname_buf =
899 imgp->interpreter_name = rpath;
900 }
901 }
902 return (error);
903 }
904
905 /*
906 * exec_setregs may initialize some registers differently than Linux
907 * does, thus potentially confusing Linux binaries. If necessary, we
908 * override the exec_setregs default(s) here.
909 */
910 static void
911 exec_linux_setregs(struct thread *td, struct image_params *imgp, u_long stack)
912 {
913 struct pcb *pcb = td->td_pcb;
914
915 exec_setregs(td, imgp, stack);
916
917 /* Linux sets %gs to 0, we default to _udatasel */
918 pcb->pcb_gs = 0;
919 load_gs(0);
920
921 pcb->pcb_initial_npxcw = __LINUX_NPXCW__;
922 }
923
924 static void
925 linux_get_machine(const char **dst)
926 {
927
928 switch (cpu_class) {
929 case CPUCLASS_686:
930 *dst = "i686";
931 break;
932 case CPUCLASS_586:
933 *dst = "i586";
934 break;
935 case CPUCLASS_486:
936 *dst = "i486";
937 break;
938 default:
939 *dst = "i386";
940 }
941 }
942
943 struct sysentvec linux_sysvec = {
944 .sv_size = LINUX_SYS_MAXSYSCALL,
945 .sv_table = linux_sysent,
946 .sv_mask = 0,
947 .sv_sigsize = LINUX_SIGTBLSZ,
948 .sv_sigtbl = bsd_to_linux_signal,
949 .sv_errsize = ELAST + 1,
950 .sv_errtbl = bsd_to_linux_errno,
951 .sv_transtrap = translate_traps,
952 .sv_fixup = linux_fixup,
953 .sv_sendsig = linux_sendsig,
954 .sv_sigcode = linux_sigcode,
955 .sv_szsigcode = &linux_szsigcode,
956 .sv_prepsyscall = NULL,
957 .sv_name = "Linux a.out",
958 .sv_coredump = NULL,
959 .sv_imgact_try = exec_linux_imgact_try,
960 .sv_minsigstksz = LINUX_MINSIGSTKSZ,
961 .sv_pagesize = PAGE_SIZE,
962 .sv_minuser = VM_MIN_ADDRESS,
963 .sv_maxuser = VM_MAXUSER_ADDRESS,
964 .sv_usrstack = LINUX_USRSTACK,
965 .sv_psstrings = PS_STRINGS,
966 .sv_stackprot = VM_PROT_ALL,
967 .sv_copyout_strings = exec_copyout_strings,
968 .sv_setregs = exec_linux_setregs,
969 .sv_fixlimit = NULL,
970 .sv_maxssiz = NULL,
971 .sv_flags = SV_ABI_LINUX | SV_AOUT | SV_IA32 | SV_ILP32,
972 .sv_set_syscall_retval = cpu_set_syscall_retval,
973 .sv_fetch_syscall_args = linux_fetch_syscall_args,
974 .sv_syscallnames = NULL,
975 .sv_shared_page_base = LINUX_SHAREDPAGE,
976 .sv_shared_page_len = PAGE_SIZE,
977 .sv_schedtail = linux_schedtail,
978 };
979 INIT_SYSENTVEC(aout_sysvec, &linux_sysvec);
980
981 struct sysentvec elf_linux_sysvec = {
982 .sv_size = LINUX_SYS_MAXSYSCALL,
983 .sv_table = linux_sysent,
984 .sv_mask = 0,
985 .sv_sigsize = LINUX_SIGTBLSZ,
986 .sv_sigtbl = bsd_to_linux_signal,
987 .sv_errsize = ELAST + 1,
988 .sv_errtbl = bsd_to_linux_errno,
989 .sv_transtrap = translate_traps,
990 .sv_fixup = elf_linux_fixup,
991 .sv_sendsig = linux_sendsig,
992 .sv_sigcode = linux_sigcode,
993 .sv_szsigcode = &linux_szsigcode,
994 .sv_prepsyscall = NULL,
995 .sv_name = "Linux ELF",
996 .sv_coredump = elf32_coredump,
997 .sv_imgact_try = exec_linux_imgact_try,
998 .sv_minsigstksz = LINUX_MINSIGSTKSZ,
999 .sv_pagesize = PAGE_SIZE,
1000 .sv_minuser = VM_MIN_ADDRESS,
1001 .sv_maxuser = VM_MAXUSER_ADDRESS,
1002 .sv_usrstack = LINUX_USRSTACK,
1003 .sv_psstrings = LINUX_PS_STRINGS,
1004 .sv_stackprot = VM_PROT_ALL,
1005 .sv_copyout_strings = linux_copyout_strings,
1006 .sv_setregs = exec_linux_setregs,
1007 .sv_fixlimit = NULL,
1008 .sv_maxssiz = NULL,
1009 .sv_flags = SV_ABI_LINUX | SV_IA32 | SV_ILP32 | SV_SHP,
1010 .sv_set_syscall_retval = cpu_set_syscall_retval,
1011 .sv_fetch_syscall_args = linux_fetch_syscall_args,
1012 .sv_syscallnames = NULL,
1013 .sv_shared_page_base = LINUX_SHAREDPAGE,
1014 .sv_shared_page_len = PAGE_SIZE,
1015 .sv_schedtail = linux_schedtail,
1016 };
1017 INIT_SYSENTVEC(elf_sysvec, &elf_linux_sysvec);
1018
1019 static char GNU_ABI_VENDOR[] = "GNU";
1020 static int GNULINUX_ABI_DESC = 0;
1021
1022 static boolean_t
1023 linux_trans_osrel(const Elf_Note *note, int32_t *osrel)
1024 {
1025 const Elf32_Word *desc;
1026 uintptr_t p;
1027
1028 p = (uintptr_t)(note + 1);
1029 p += roundup2(note->n_namesz, sizeof(Elf32_Addr));
1030
1031 desc = (const Elf32_Word *)p;
1032 if (desc[0] != GNULINUX_ABI_DESC)
1033 return (FALSE);
1034
1035 /*
1036 * For linux we encode osrel as follows (see linux_mib.c):
1037 * VVVMMMIII (version, major, minor), see linux_mib.c.
1038 */
1039 *osrel = desc[1] * 1000000 + desc[2] * 1000 + desc[3];
1040
1041 return (TRUE);
1042 }
1043
1044 static Elf_Brandnote linux_brandnote = {
1045 .hdr.n_namesz = sizeof(GNU_ABI_VENDOR),
1046 .hdr.n_descsz = 16, /* XXX at least 16 */
1047 .hdr.n_type = 1,
1048 .vendor = GNU_ABI_VENDOR,
1049 .flags = BN_TRANSLATE_OSREL,
1050 .trans_osrel = linux_trans_osrel
1051 };
1052
1053 static Elf32_Brandinfo linux_brand = {
1054 .brand = ELFOSABI_LINUX,
1055 .machine = EM_386,
1056 .compat_3_brand = "Linux",
1057 .emul_path = "/compat/linux",
1058 .interp_path = "/lib/ld-linux.so.1",
1059 .sysvec = &elf_linux_sysvec,
1060 .interp_newpath = NULL,
1061 .brand_note = &linux_brandnote,
1062 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
1063 };
1064
1065 static Elf32_Brandinfo linux_glibc2brand = {
1066 .brand = ELFOSABI_LINUX,
1067 .machine = EM_386,
1068 .compat_3_brand = "Linux",
1069 .emul_path = "/compat/linux",
1070 .interp_path = "/lib/ld-linux.so.2",
1071 .sysvec = &elf_linux_sysvec,
1072 .interp_newpath = NULL,
1073 .brand_note = &linux_brandnote,
1074 .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE
1075 };
1076
1077 Elf32_Brandinfo *linux_brandlist[] = {
1078 &linux_brand,
1079 &linux_glibc2brand,
1080 NULL
1081 };
1082
1083 static int
1084 linux_elf_modevent(module_t mod, int type, void *data)
1085 {
1086 Elf32_Brandinfo **brandinfo;
1087 int error;
1088 struct linux_ioctl_handler **lihp;
1089 struct linux_device_handler **ldhp;
1090
1091 error = 0;
1092
1093 switch(type) {
1094 case MOD_LOAD:
1095 for (brandinfo = &linux_brandlist[0]; *brandinfo != NULL;
1096 ++brandinfo)
1097 if (elf32_insert_brand_entry(*brandinfo) < 0)
1098 error = EINVAL;
1099 if (error == 0) {
1100 SET_FOREACH(lihp, linux_ioctl_handler_set)
1101 linux_ioctl_register_handler(*lihp);
1102 SET_FOREACH(ldhp, linux_device_handler_set)
1103 linux_device_register_handler(*ldhp);
1104 mtx_init(&emul_lock, "emuldata lock", NULL, MTX_DEF);
1105 sx_init(&emul_shared_lock, "emuldata->shared lock");
1106 LIST_INIT(&futex_list);
1107 mtx_init(&futex_mtx, "ftllk", NULL, MTX_DEF);
1108 linux_exit_tag = EVENTHANDLER_REGISTER(process_exit, linux_proc_exit,
1109 NULL, 1000);
1110 linux_exec_tag = EVENTHANDLER_REGISTER(process_exec, linux_proc_exec,
1111 NULL, 1000);
1112 linux_get_machine(&linux_platform);
1113 linux_szplatform = roundup(strlen(linux_platform) + 1,
1114 sizeof(char *));
1115 linux_osd_jail_register();
1116 stclohz = (stathz ? stathz : hz);
1117 if (bootverbose)
1118 printf("Linux ELF exec handler installed\n");
1119 } else
1120 printf("cannot insert Linux ELF brand handler\n");
1121 break;
1122 case MOD_UNLOAD:
1123 for (brandinfo = &linux_brandlist[0]; *brandinfo != NULL;
1124 ++brandinfo)
1125 if (elf32_brand_inuse(*brandinfo))
1126 error = EBUSY;
1127 if (error == 0) {
1128 for (brandinfo = &linux_brandlist[0];
1129 *brandinfo != NULL; ++brandinfo)
1130 if (elf32_remove_brand_entry(*brandinfo) < 0)
1131 error = EINVAL;
1132 }
1133 if (error == 0) {
1134 SET_FOREACH(lihp, linux_ioctl_handler_set)
1135 linux_ioctl_unregister_handler(*lihp);
1136 SET_FOREACH(ldhp, linux_device_handler_set)
1137 linux_device_unregister_handler(*ldhp);
1138 mtx_destroy(&emul_lock);
1139 sx_destroy(&emul_shared_lock);
1140 mtx_destroy(&futex_mtx);
1141 EVENTHANDLER_DEREGISTER(process_exit, linux_exit_tag);
1142 EVENTHANDLER_DEREGISTER(process_exec, linux_exec_tag);
1143 linux_osd_jail_deregister();
1144 if (bootverbose)
1145 printf("Linux ELF exec handler removed\n");
1146 } else
1147 printf("Could not deinstall ELF interpreter entry\n");
1148 break;
1149 default:
1150 return EOPNOTSUPP;
1151 }
1152 return error;
1153 }
1154
1155 static moduledata_t linux_elf_mod = {
1156 "linuxelf",
1157 linux_elf_modevent,
1158 0
1159 };
1160
1161 DECLARE_MODULE_TIED(linuxelf, linux_elf_mod, SI_SUB_EXEC, SI_ORDER_ANY);
Cache object: f133d7c31a89d026b3afdbef94be825b
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