syscall messaging 3: Expand the 'header' that goes in front of the syscall
[dragonfly.git] / sys / emulation / linux / i386 / linux_machdep.c
CommitLineData
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1/*-
2 * Copyright (c) 2000 Marcel Moolenaar
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 * $FreeBSD: src/sys/i386/linux/linux_machdep.c,v 1.6.2.4 2001/11/05 19:08:23 marcel Exp $
c7114eea 29 * $DragonFly: src/sys/emulation/linux/i386/linux_machdep.c,v 1.7 2003/07/30 00:19:14 dillon Exp $
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30 */
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/lock.h>
35#include <sys/mman.h>
36#include <sys/proc.h>
37#include <sys/resource.h>
38#include <sys/resourcevar.h>
39#include <sys/sysproto.h>
40#include <sys/unistd.h>
41
42#include <machine/frame.h>
43#include <machine/psl.h>
44#include <machine/segments.h>
45#include <machine/sysarch.h>
46
47#include <vm/vm.h>
48#include <vm/pmap.h>
49#include <vm/vm_map.h>
50
51#include <i386/linux/linux.h>
52#include <i386/linux/linux_proto.h>
53#include <compat/linux/linux_ipc.h>
54#include <compat/linux/linux_signal.h>
55#include <compat/linux/linux_util.h>
56
57struct l_descriptor {
58 l_uint entry_number;
59 l_ulong base_addr;
60 l_uint limit;
61 l_uint seg_32bit:1;
62 l_uint contents:2;
63 l_uint read_exec_only:1;
64 l_uint limit_in_pages:1;
65 l_uint seg_not_present:1;
66 l_uint useable:1;
67};
68
69struct l_old_select_argv {
70 l_int nfds;
71 l_fd_set *readfds;
72 l_fd_set *writefds;
73 l_fd_set *exceptfds;
74 struct l_timeval *timeout;
75};
76
77int
78linux_to_bsd_sigaltstack(int lsa)
79{
80 int bsa = 0;
81
82 if (lsa & LINUX_SS_DISABLE)
83 bsa |= SS_DISABLE;
84 if (lsa & LINUX_SS_ONSTACK)
85 bsa |= SS_ONSTACK;
86 return (bsa);
87}
88
89int
90bsd_to_linux_sigaltstack(int bsa)
91{
92 int lsa = 0;
93
94 if (bsa & SS_DISABLE)
95 lsa |= LINUX_SS_DISABLE;
96 if (bsa & SS_ONSTACK)
97 lsa |= LINUX_SS_ONSTACK;
98 return (lsa);
99}
100
101int
41c20dac 102linux_execve(struct linux_execve_args *args)
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103{
104 struct execve_args bsd;
90b9818c 105 int error;
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106 caddr_t sg;
107
108 sg = stackgap_init();
41c20dac 109 CHECKALTEXIST(&sg, args->path);
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110
111#ifdef DEBUG
112 if (ldebug(execve))
113 printf(ARGS(execve, "%s"), args->path);
114#endif
115
c7114eea 116 bsd.sysmsg_result = 0;
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117 bsd.fname = args->path;
118 bsd.argv = args->argp;
119 bsd.envv = args->envp;
90b9818c 120 error = execve(&bsd);
c7114eea 121 args->sysmsg_result = bsd.sysmsg_result;
90b9818c 122 return(error);
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123}
124
125struct l_ipc_kludge {
126 struct l_msgbuf *msgp;
127 l_long msgtyp;
128};
129
130int
41c20dac 131linux_ipc(struct linux_ipc_args *args)
984263bc 132{
90b9818c 133 int error = 0;
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134
135 switch (args->what & 0xFFFF) {
136 case LINUX_SEMOP: {
137 struct linux_semop_args a;
138
139 a.semid = args->arg1;
140 a.tsops = args->ptr;
141 a.nsops = args->arg2;
c7114eea 142 a.sysmsg_lresult = 0;
90b9818c 143 error = linux_semop(&a);
c7114eea 144 args->sysmsg_lresult = a.sysmsg_lresult;
90b9818c 145 break;
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146 }
147 case LINUX_SEMGET: {
148 struct linux_semget_args a;
149
150 a.key = args->arg1;
151 a.nsems = args->arg2;
152 a.semflg = args->arg3;
c7114eea 153 a.sysmsg_lresult = 0;
90b9818c 154 error = linux_semget(&a);
c7114eea 155 args->sysmsg_lresult = a.sysmsg_lresult;
90b9818c 156 break;
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157 }
158 case LINUX_SEMCTL: {
159 struct linux_semctl_args a;
160 int error;
161
162 a.semid = args->arg1;
163 a.semnum = args->arg2;
164 a.cmd = args->arg3;
c7114eea 165 a.sysmsg_lresult = 0;
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166 error = copyin((caddr_t)args->ptr, &a.arg, sizeof(a.arg));
167 if (error)
168 return (error);
90b9818c 169 error = linux_semctl(&a);
c7114eea 170 args->sysmsg_lresult = a.sysmsg_lresult;
90b9818c 171 break;
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172 }
173 case LINUX_MSGSND: {
174 struct linux_msgsnd_args a;
175
176 a.msqid = args->arg1;
177 a.msgp = args->ptr;
178 a.msgsz = args->arg2;
179 a.msgflg = args->arg3;
c7114eea 180 a.sysmsg_lresult = 0;
90b9818c 181 error = linux_msgsnd(&a);
c7114eea 182 args->sysmsg_lresult = a.sysmsg_lresult;
90b9818c 183 break;
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184 }
185 case LINUX_MSGRCV: {
186 struct linux_msgrcv_args a;
187
188 a.msqid = args->arg1;
189 a.msgsz = args->arg2;
190 a.msgflg = args->arg3;
c7114eea 191 a.sysmsg_lresult = 0;
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192 if ((args->what >> 16) == 0) {
193 struct l_ipc_kludge tmp;
194 int error;
195
196 if (args->ptr == NULL)
197 return (EINVAL);
198 error = copyin((caddr_t)args->ptr, &tmp, sizeof(tmp));
199 if (error)
200 return (error);
201 a.msgp = tmp.msgp;
202 a.msgtyp = tmp.msgtyp;
203 } else {
204 a.msgp = args->ptr;
205 a.msgtyp = args->arg5;
206 }
90b9818c 207 error = linux_msgrcv(&a);
c7114eea 208 args->sysmsg_lresult = a.sysmsg_lresult;
90b9818c 209 break;
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210 }
211 case LINUX_MSGGET: {
212 struct linux_msgget_args a;
213
214 a.key = args->arg1;
215 a.msgflg = args->arg2;
c7114eea 216 a.sysmsg_lresult = 0;
90b9818c 217 error = linux_msgget(&a);
c7114eea 218 args->sysmsg_lresult = a.sysmsg_lresult;
90b9818c 219 break;
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220 }
221 case LINUX_MSGCTL: {
222 struct linux_msgctl_args a;
223
224 a.msqid = args->arg1;
225 a.cmd = args->arg2;
226 a.buf = args->ptr;
c7114eea 227 a.sysmsg_lresult = 0;
90b9818c 228 error = linux_msgctl(&a);
c7114eea 229 args->sysmsg_lresult = a.sysmsg_lresult;
90b9818c 230 break;
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231 }
232 case LINUX_SHMAT: {
233 struct linux_shmat_args a;
234
235 a.shmid = args->arg1;
236 a.shmaddr = args->ptr;
237 a.shmflg = args->arg2;
238 a.raddr = (l_ulong *)args->arg3;
c7114eea 239 a.sysmsg_lresult = 0;
90b9818c 240 error = linux_shmat(&a);
c7114eea 241 args->sysmsg_lresult = a.sysmsg_lresult;
90b9818c 242 break;
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243 }
244 case LINUX_SHMDT: {
245 struct linux_shmdt_args a;
246
247 a.shmaddr = args->ptr;
c7114eea 248 a.sysmsg_lresult = 0;
90b9818c 249 error = linux_shmdt(&a);
c7114eea 250 args->sysmsg_lresult = a.sysmsg_lresult;
90b9818c 251 break;
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252 }
253 case LINUX_SHMGET: {
254 struct linux_shmget_args a;
255
256 a.key = args->arg1;
257 a.size = args->arg2;
258 a.shmflg = args->arg3;
c7114eea 259 a.sysmsg_lresult = 0;
90b9818c 260 error = linux_shmget(&a);
c7114eea 261 args->sysmsg_lresult = a.sysmsg_lresult;
90b9818c 262 break;
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263 }
264 case LINUX_SHMCTL: {
265 struct linux_shmctl_args a;
266
267 a.shmid = args->arg1;
268 a.cmd = args->arg2;
269 a.buf = args->ptr;
c7114eea 270 a.sysmsg_lresult = 0;
90b9818c 271 error = linux_shmctl(&a);
c7114eea 272 args->sysmsg_lresult = a.sysmsg_lresult;
90b9818c 273 break;
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274 }
275 default:
90b9818c 276 error = EINVAL;
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277 break;
278 }
90b9818c 279 return(error);
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280}
281
282int
41c20dac 283linux_old_select(struct linux_old_select_args *args)
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284{
285 struct l_old_select_argv linux_args;
286 struct linux_select_args newsel;
287 int error;
288
289#ifdef DEBUG
290 if (ldebug(old_select))
f15db79e 291 printf(ARGS(old_select, "%p"), args->ptr);
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292#endif
293
294 error = copyin((caddr_t)args->ptr, &linux_args, sizeof(linux_args));
295 if (error)
296 return (error);
297
c7114eea 298 newsel.sysmsg_result = 0;
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299 newsel.nfds = linux_args.nfds;
300 newsel.readfds = linux_args.readfds;
301 newsel.writefds = linux_args.writefds;
302 newsel.exceptfds = linux_args.exceptfds;
303 newsel.timeout = linux_args.timeout;
90b9818c 304 error = linux_select(&newsel);
c7114eea 305 args->sysmsg_result = newsel.sysmsg_result;
90b9818c 306 return(error);
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307}
308
309int
41c20dac 310linux_fork(struct linux_fork_args *args)
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311{
312 int error;
313
314#ifdef DEBUG
315 if (ldebug(fork))
316 printf(ARGS(fork, ""));
317#endif
318
41c20dac 319 if ((error = fork((struct fork_args *)args)) != 0)
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320 return (error);
321
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322 if (args->sysmsg_result == 1)
323 args->sysmsg_result = 0;
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324 return (0);
325}
326
327int
41c20dac 328linux_vfork(struct linux_vfork_args *args)
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329{
330 int error;
331
332#ifdef DEBUG
333 if (ldebug(vfork))
334 printf(ARGS(vfork, ""));
335#endif
336
41c20dac 337 if ((error = vfork((struct vfork_args *)args)) != 0)
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338 return (error);
339 /* Are we the child? */
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340 if (args->sysmsg_result == 1)
341 args->sysmsg_result = 0;
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342 return (0);
343}
344
345#define CLONE_VM 0x100
346#define CLONE_FS 0x200
347#define CLONE_FILES 0x400
348#define CLONE_SIGHAND 0x800
349#define CLONE_PID 0x1000
350
351int
41c20dac 352linux_clone(struct linux_clone_args *args)
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353{
354 int error, ff = RFPROC;
355 struct proc *p2;
356 int exit_signal;
357 vm_offset_t start;
358 struct rfork_args rf_args;
359
360#ifdef DEBUG
361 if (ldebug(clone)) {
362 printf(ARGS(clone, "flags %x, stack %x"),
363 (unsigned int)args->flags, (unsigned int)args->stack);
364 if (args->flags & CLONE_PID)
365 printf(LMSG("CLONE_PID not yet supported"));
366 }
367#endif
368
369 if (!args->stack)
370 return (EINVAL);
371
372 exit_signal = args->flags & 0x000000ff;
373 if (exit_signal >= LINUX_NSIG)
374 return (EINVAL);
375
376 if (exit_signal <= LINUX_SIGTBLSZ)
377 exit_signal = linux_to_bsd_signal[_SIG_IDX(exit_signal)];
378
379 /* RFTHREAD probably not necessary here, but it shouldn't hurt */
380 ff |= RFTHREAD;
381
382 if (args->flags & CLONE_VM)
383 ff |= RFMEM;
384 if (args->flags & CLONE_SIGHAND)
385 ff |= RFSIGSHARE;
386 if (!(args->flags & CLONE_FILES))
387 ff |= RFFDG;
388
389 error = 0;
390 start = 0;
391
392 rf_args.flags = ff;
c7114eea 393 rf_args.sysmsg_result = 0;
41c20dac 394 if ((error = rfork(&rf_args)) != 0)
984263bc 395 return (error);
c7114eea 396 args->sysmsg_result = rf_args.sysmsg_result;
984263bc 397
c7114eea 398 p2 = pfind(rf_args.sysmsg_result);
90b9818c 399 if (p2 == NULL)
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400 return (ESRCH);
401
402 p2->p_sigparent = exit_signal;
403 p2->p_md.md_regs->tf_esp = (unsigned int)args->stack;
404
405#ifdef DEBUG
406 if (ldebug(clone))
407 printf(LMSG("clone: successful rfork to %ld"),
408 (long)p2->p_pid);
409#endif
410
411 return (0);
412}
413
414/* XXX move */
415struct l_mmap_argv {
416 l_caddr_t addr;
417 l_int len;
418 l_int prot;
419 l_int flags;
420 l_int fd;
421 l_int pos;
422};
423
424#define STACK_SIZE (2 * 1024 * 1024)
425#define GUARD_SIZE (4 * PAGE_SIZE)
426
427int
41c20dac 428linux_mmap(struct linux_mmap_args *args)
984263bc 429{
41c20dac 430 struct proc *p = curproc;
90b9818c 431 struct mmap_args bsd_args;
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432 int error;
433 struct l_mmap_argv linux_args;
434
435 error = copyin((caddr_t)args->ptr, &linux_args, sizeof(linux_args));
436 if (error)
437 return (error);
438
439#ifdef DEBUG
440 if (ldebug(mmap))
441 printf(ARGS(mmap, "%p, %d, %d, 0x%08x, %d, %d"),
442 (void *)linux_args.addr, linux_args.len, linux_args.prot,
443 linux_args.flags, linux_args.fd, linux_args.pos);
444#endif
445
446 bsd_args.flags = 0;
c7114eea 447 bsd_args.sysmsg_resultp = NULL;
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448 if (linux_args.flags & LINUX_MAP_SHARED)
449 bsd_args.flags |= MAP_SHARED;
450 if (linux_args.flags & LINUX_MAP_PRIVATE)
451 bsd_args.flags |= MAP_PRIVATE;
452 if (linux_args.flags & LINUX_MAP_FIXED)
453 bsd_args.flags |= MAP_FIXED;
454 if (linux_args.flags & LINUX_MAP_ANON)
455 bsd_args.flags |= MAP_ANON;
456 else
457 bsd_args.flags |= MAP_NOSYNC;
458 if (linux_args.flags & LINUX_MAP_GROWSDOWN) {
459 bsd_args.flags |= MAP_STACK;
460
461 /* The linux MAP_GROWSDOWN option does not limit auto
462 * growth of the region. Linux mmap with this option
463 * takes as addr the inital BOS, and as len, the initial
464 * region size. It can then grow down from addr without
465 * limit. However, linux threads has an implicit internal
466 * limit to stack size of STACK_SIZE. Its just not
467 * enforced explicitly in linux. But, here we impose
468 * a limit of (STACK_SIZE - GUARD_SIZE) on the stack
469 * region, since we can do this with our mmap.
470 *
471 * Our mmap with MAP_STACK takes addr as the maximum
472 * downsize limit on BOS, and as len the max size of
473 * the region. It them maps the top SGROWSIZ bytes,
474 * and autgrows the region down, up to the limit
475 * in addr.
476 *
477 * If we don't use the MAP_STACK option, the effect
478 * of this code is to allocate a stack region of a
479 * fixed size of (STACK_SIZE - GUARD_SIZE).
480 */
481
482 /* This gives us TOS */
483 bsd_args.addr = linux_args.addr + linux_args.len;
484
485 if (bsd_args.addr > p->p_vmspace->vm_maxsaddr) {
486 /* Some linux apps will attempt to mmap
487 * thread stacks near the top of their
488 * address space. If their TOS is greater
489 * than vm_maxsaddr, vm_map_growstack()
490 * will confuse the thread stack with the
491 * process stack and deliver a SEGV if they
492 * attempt to grow the thread stack past their
493 * current stacksize rlimit. To avoid this,
494 * adjust vm_maxsaddr upwards to reflect
495 * the current stacksize rlimit rather
496 * than the maximum possible stacksize.
497 * It would be better to adjust the
498 * mmap'ed region, but some apps do not check
499 * mmap's return value.
500 */
501 p->p_vmspace->vm_maxsaddr = (char *)USRSTACK -
502 p->p_rlimit[RLIMIT_STACK].rlim_cur;
503 }
504
505 /* This gives us our maximum stack size */
506 if (linux_args.len > STACK_SIZE - GUARD_SIZE)
507 bsd_args.len = linux_args.len;
508 else
509 bsd_args.len = STACK_SIZE - GUARD_SIZE;
510
511 /* This gives us a new BOS. If we're using VM_STACK, then
512 * mmap will just map the top SGROWSIZ bytes, and let
513 * the stack grow down to the limit at BOS. If we're
514 * not using VM_STACK we map the full stack, since we
515 * don't have a way to autogrow it.
516 */
517 bsd_args.addr -= bsd_args.len;
518 } else {
519 bsd_args.addr = linux_args.addr;
520 bsd_args.len = linux_args.len;
521 }
522
523 bsd_args.prot = linux_args.prot | PROT_READ; /* always required */
524 if (linux_args.flags & LINUX_MAP_ANON)
525 bsd_args.fd = -1;
526 else
527 bsd_args.fd = linux_args.fd;
528 bsd_args.pos = linux_args.pos;
529 bsd_args.pad = 0;
530
531#ifdef DEBUG
532 if (ldebug(mmap))
533 printf("-> (%p, %d, %d, 0x%08x, %d, %d)\n",
534 (void *)bsd_args.addr, bsd_args.len, bsd_args.prot,
535 bsd_args.flags, bsd_args.fd, (int)bsd_args.pos);
536#endif
537
90b9818c 538 error = mmap(&bsd_args);
c7114eea 539 args->sysmsg_resultp = bsd_args.sysmsg_resultp;
90b9818c 540 return(error);
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541}
542
543int
41c20dac 544linux_pipe(struct linux_pipe_args *args)
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545{
546 int error;
547 int reg_edx;
90b9818c 548 struct pipe_args bsd_args;
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549
550#ifdef DEBUG
551 if (ldebug(pipe))
552 printf(ARGS(pipe, "*"));
553#endif
554
c7114eea 555 reg_edx = args->sysmsg_fds[1];
90b9818c 556 error = pipe(&bsd_args);
984263bc 557 if (error) {
c7114eea 558 args->sysmsg_fds[1] = reg_edx;
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559 return (error);
560 }
561
c7114eea 562 error = copyout(bsd_args.sysmsg_fds, args->pipefds, 2*sizeof(int));
984263bc 563 if (error) {
c7114eea 564 args->sysmsg_fds[1] = reg_edx;
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565 return (error);
566 }
567
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568 args->sysmsg_fds[1] = reg_edx;
569 args->sysmsg_fds[0] = 0;
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570 return (0);
571}
572
573int
41c20dac 574linux_ioperm(struct linux_ioperm_args *args)
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575{
576 struct sysarch_args sa;
577 struct i386_ioperm_args *iia;
578 caddr_t sg;
90b9818c 579 int error;
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580
581 sg = stackgap_init();
582 iia = stackgap_alloc(&sg, sizeof(struct i386_ioperm_args));
583 iia->start = args->start;
584 iia->length = args->length;
585 iia->enable = args->enable;
c7114eea 586 sa.sysmsg_resultp = NULL;
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587 sa.op = I386_SET_IOPERM;
588 sa.parms = (char *)iia;
90b9818c 589 error = sysarch(&sa);
c7114eea 590 args->sysmsg_resultp = sa.sysmsg_resultp;
90b9818c 591 return(error);
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592}
593
594int
41c20dac 595linux_iopl(struct linux_iopl_args *args)
984263bc 596{
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597 struct thread *td = curthread;
598 struct proc *p = td->td_proc;
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599 int error;
600
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601 KKASSERT(p);
602
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603 if (args->level < 0 || args->level > 3)
604 return (EINVAL);
dadab5e9 605 if ((error = suser(td)) != 0)
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606 return (error);
607 if (securelevel > 0)
608 return (EPERM);
609 p->p_md.md_regs->tf_eflags = (p->p_md.md_regs->tf_eflags & ~PSL_IOPL) |
610 (args->level * (PSL_IOPL / 3));
611 return (0);
612}
613
614int
41c20dac 615linux_modify_ldt(struct linux_modify_ldt_args *uap)
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616{
617 int error;
618 caddr_t sg;
619 struct sysarch_args args;
620 struct i386_ldt_args *ldt;
621 struct l_descriptor ld;
622 union descriptor *desc;
623
624 sg = stackgap_init();
625
626 if (uap->ptr == NULL)
627 return (EINVAL);
628
629 switch (uap->func) {
630 case 0x00: /* read_ldt */
631 ldt = stackgap_alloc(&sg, sizeof(*ldt));
632 ldt->start = 0;
633 ldt->descs = uap->ptr;
634 ldt->num = uap->bytecount / sizeof(union descriptor);
635 args.op = I386_GET_LDT;
636 args.parms = (char*)ldt;
c7114eea 637 args.sysmsg_result = 0;
41c20dac 638 error = sysarch(&args);
c7114eea 639 uap->sysmsg_result = args.sysmsg_result *
90b9818c 640 sizeof(union descriptor);
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641 break;
642 case 0x01: /* write_ldt */
643 case 0x11: /* write_ldt */
644 if (uap->bytecount != sizeof(ld))
645 return (EINVAL);
646
647 error = copyin(uap->ptr, &ld, sizeof(ld));
648 if (error)
649 return (error);
650
651 ldt = stackgap_alloc(&sg, sizeof(*ldt));
652 desc = stackgap_alloc(&sg, sizeof(*desc));
653 ldt->start = ld.entry_number;
654 ldt->descs = desc;
655 ldt->num = 1;
656 desc->sd.sd_lolimit = (ld.limit & 0x0000ffff);
657 desc->sd.sd_hilimit = (ld.limit & 0x000f0000) >> 16;
658 desc->sd.sd_lobase = (ld.base_addr & 0x00ffffff);
659 desc->sd.sd_hibase = (ld.base_addr & 0xff000000) >> 24;
660 desc->sd.sd_type = SDT_MEMRO | ((ld.read_exec_only ^ 1) << 1) |
661 (ld.contents << 2);
662 desc->sd.sd_dpl = 3;
663 desc->sd.sd_p = (ld.seg_not_present ^ 1);
664 desc->sd.sd_xx = 0;
665 desc->sd.sd_def32 = ld.seg_32bit;
666 desc->sd.sd_gran = ld.limit_in_pages;
667 args.op = I386_SET_LDT;
668 args.parms = (char*)ldt;
c7114eea 669 args.sysmsg_result = 0;
41c20dac 670 error = sysarch(&args);
c7114eea 671 uap->sysmsg_result = args.sysmsg_result;
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672 break;
673 default:
674 error = EINVAL;
675 break;
676 }
677
678 if (error == EOPNOTSUPP) {
679 printf("linux: modify_ldt needs kernel option USER_LDT\n");
680 error = ENOSYS;
681 }
682
683 return (error);
684}
685
686int
41c20dac 687linux_sigaction(struct linux_sigaction_args *args)
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688{
689 l_osigaction_t osa;
690 l_sigaction_t act, oact;
691 int error;
692
693#ifdef DEBUG
694 if (ldebug(sigaction))
695 printf(ARGS(sigaction, "%d, %p, %p"),
696 args->sig, (void *)args->nsa, (void *)args->osa);
697#endif
698
699 if (args->nsa != NULL) {
700 error = copyin((caddr_t)args->nsa, &osa,
701 sizeof(l_osigaction_t));
702 if (error)
703 return (error);
704 act.lsa_handler = osa.lsa_handler;
705 act.lsa_flags = osa.lsa_flags;
706 act.lsa_restorer = osa.lsa_restorer;
707 LINUX_SIGEMPTYSET(act.lsa_mask);
708 act.lsa_mask.__bits[0] = osa.lsa_mask;
709 }
710
41c20dac 711 error = linux_do_sigaction(args->sig, args->nsa ? &act : NULL,
c7114eea 712 args->osa ? &oact : NULL, &args->sysmsg_result);
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713
714 if (args->osa != NULL && !error) {
715 osa.lsa_handler = oact.lsa_handler;
716 osa.lsa_flags = oact.lsa_flags;
717 osa.lsa_restorer = oact.lsa_restorer;
718 osa.lsa_mask = oact.lsa_mask.__bits[0];
719 error = copyout(&osa, (caddr_t)args->osa,
720 sizeof(l_osigaction_t));
721 }
722
723 return (error);
724}
725
726/*
727 * Linux has two extra args, restart and oldmask. We dont use these,
728 * but it seems that "restart" is actually a context pointer that
729 * enables the signal to happen with a different register set.
730 */
731int
41c20dac 732linux_sigsuspend(struct linux_sigsuspend_args *args)
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733{
734 struct sigsuspend_args bsd;
735 sigset_t *sigmask;
736 l_sigset_t mask;
737 caddr_t sg = stackgap_init();
90b9818c 738 int error;
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739
740#ifdef DEBUG
741 if (ldebug(sigsuspend))
742 printf(ARGS(sigsuspend, "%08lx"), (unsigned long)args->mask);
743#endif
744
745 sigmask = stackgap_alloc(&sg, sizeof(sigset_t));
746 LINUX_SIGEMPTYSET(mask);
747 mask.__bits[0] = args->mask;
748 linux_to_bsd_sigset(&mask, sigmask);
749 bsd.sigmask = sigmask;
c7114eea 750 bsd.sysmsg_result = 0;
90b9818c 751 error = sigsuspend(&bsd);
c7114eea 752 args->sysmsg_result = bsd.sysmsg_result;
90b9818c 753 return(error);
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754}
755
756int
41c20dac 757linux_rt_sigsuspend(struct linux_rt_sigsuspend_args *uap)
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758{
759 l_sigset_t lmask;
760 sigset_t *bmask;
761 struct sigsuspend_args bsd;
762 caddr_t sg = stackgap_init();
763 int error;
764
765#ifdef DEBUG
766 if (ldebug(rt_sigsuspend))
767 printf(ARGS(rt_sigsuspend, "%p, %d"),
768 (void *)uap->newset, uap->sigsetsize);
769#endif
770
771 if (uap->sigsetsize != sizeof(l_sigset_t))
772 return (EINVAL);
773
774 error = copyin(uap->newset, &lmask, sizeof(l_sigset_t));
775 if (error)
776 return (error);
777
778 bmask = stackgap_alloc(&sg, sizeof(sigset_t));
779 linux_to_bsd_sigset(&lmask, bmask);
780 bsd.sigmask = bmask;
c7114eea 781 bsd.sysmsg_result = 0;
90b9818c 782 error = sigsuspend(&bsd);
c7114eea 783 uap->sysmsg_result = bsd.sysmsg_result;
90b9818c 784 return(error);
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785}
786
787int
41c20dac 788linux_pause(struct linux_pause_args *args)
984263bc 789{
41c20dac 790 struct proc *p = curproc;
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791 struct sigsuspend_args bsd;
792 sigset_t *sigmask;
793 caddr_t sg = stackgap_init();
90b9818c 794 int error;
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795
796#ifdef DEBUG
797 if (ldebug(pause))
798 printf(ARGS(pause, ""));
799#endif
800
801 sigmask = stackgap_alloc(&sg, sizeof(sigset_t));
802 *sigmask = p->p_sigmask;
803 bsd.sigmask = sigmask;
c7114eea 804 bsd.sysmsg_result = 0;
90b9818c 805 error = sigsuspend(&bsd);
c7114eea 806 args->sysmsg_result = bsd.sysmsg_result;
90b9818c 807 return(error);
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808}
809
810int
41c20dac 811linux_sigaltstack(struct linux_sigaltstack_args *uap)
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812{
813 struct sigaltstack_args bsd;
814 stack_t *ss, *oss;
815 l_stack_t lss;
816 int error;
817 caddr_t sg = stackgap_init();
818
819#ifdef DEBUG
820 if (ldebug(sigaltstack))
821 printf(ARGS(sigaltstack, "%p, %p"), uap->uss, uap->uoss);
822#endif
823
824 if (uap->uss == NULL) {
825 ss = NULL;
826 } else {
827 error = copyin(uap->uss, &lss, sizeof(l_stack_t));
828 if (error)
829 return (error);
830
831 ss = stackgap_alloc(&sg, sizeof(stack_t));
832 ss->ss_sp = lss.ss_sp;
833 ss->ss_size = lss.ss_size;
834 ss->ss_flags = linux_to_bsd_sigaltstack(lss.ss_flags);
835 }
836 oss = (uap->uoss != NULL)
837 ? stackgap_alloc(&sg, sizeof(stack_t))
838 : NULL;
839
840 bsd.ss = ss;
841 bsd.oss = oss;
c7114eea 842 bsd.sysmsg_result = 0;
41c20dac 843 error = sigaltstack(&bsd);
c7114eea 844 uap->sysmsg_result = bsd.sysmsg_result;
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845
846 if (!error && oss != NULL) {
847 lss.ss_sp = oss->ss_sp;
848 lss.ss_size = oss->ss_size;
849 lss.ss_flags = bsd_to_linux_sigaltstack(oss->ss_flags);
850 error = copyout(&lss, uap->uoss, sizeof(l_stack_t));
851 }
852
853 return (error);
854}