Deleted Added
sdiff udiff text old ( 52121 ) new ( 54188 )
full compact
sys_machdep.c (52121) sys_machdep.c (54188)
1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
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

--- 17 unchanged lines hidden (view full) ---

26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * from: @(#)sys_machdep.c 5.5 (Berkeley) 1/19/91
1/*-
2 * Copyright (c) 1990 The Regents of the University of California.
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

--- 17 unchanged lines hidden (view full) ---

26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * from: @(#)sys_machdep.c 5.5 (Berkeley) 1/19/91
34 * $FreeBSD: head/sys/amd64/amd64/sys_machdep.c 52121 1999-10-11 14:50:03Z peter $
34 * $FreeBSD: head/sys/amd64/amd64/sys_machdep.c 54188 1999-12-06 04:53:08Z luoqi $
35 *
36 */
37
38#include "opt_user_ldt.h"
39#include "opt_smp.h"
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/sysproto.h>
35 *
36 */
37
38#include "opt_user_ldt.h"
39#include "opt_smp.h"
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/sysproto.h>
44#include <sys/malloc.h>
44#include <sys/proc.h>
45
46#include <vm/vm.h>
47#include <sys/lock.h>
48#include <vm/pmap.h>
49#include <vm/vm_map.h>
50#include <vm/vm_extern.h>
51

--- 8 unchanged lines hidden (view full) ---

60#define MAX_LD 8192
61#define LD_PER_PAGE 512
62#define NEW_MAX_LD(num) ((num + LD_PER_PAGE) & ~(LD_PER_PAGE-1))
63#define SIZE_FROM_LARGEST_LD(num) (NEW_MAX_LD(num) << 3)
64
65
66
67#ifdef USER_LDT
45#include <sys/proc.h>
46
47#include <vm/vm.h>
48#include <sys/lock.h>
49#include <vm/pmap.h>
50#include <vm/vm_map.h>
51#include <vm/vm_extern.h>
52

--- 8 unchanged lines hidden (view full) ---

61#define MAX_LD 8192
62#define LD_PER_PAGE 512
63#define NEW_MAX_LD(num) ((num + LD_PER_PAGE) & ~(LD_PER_PAGE-1))
64#define SIZE_FROM_LARGEST_LD(num) (NEW_MAX_LD(num) << 3)
65
66
67
68#ifdef USER_LDT
68void set_user_ldt __P((struct pcb *pcb));
69static int i386_get_ldt __P((struct proc *, char *));
70static int i386_set_ldt __P((struct proc *, char *));
71#endif
72static int i386_get_ioperm __P((struct proc *, char *));
73static int i386_set_ioperm __P((struct proc *, char *));
74int i386_extend_pcb __P((struct proc *));
75
76#ifndef _SYS_SYSPROTO_H_

--- 54 unchanged lines hidden (view full) ---

131 };
132
133 ext = (struct pcb_ext *)kmem_alloc(kernel_map, ctob(IOPAGES+1));
134 if (ext == 0)
135 return (ENOMEM);
136 p->p_addr->u_pcb.pcb_ext = ext;
137 bzero(ext, sizeof(struct pcb_ext));
138 ext->ext_tss.tss_esp0 = (unsigned)p->p_addr + ctob(UPAGES) - 16;
69static int i386_get_ldt __P((struct proc *, char *));
70static int i386_set_ldt __P((struct proc *, char *));
71#endif
72static int i386_get_ioperm __P((struct proc *, char *));
73static int i386_set_ioperm __P((struct proc *, char *));
74int i386_extend_pcb __P((struct proc *));
75
76#ifndef _SYS_SYSPROTO_H_

--- 54 unchanged lines hidden (view full) ---

131 };
132
133 ext = (struct pcb_ext *)kmem_alloc(kernel_map, ctob(IOPAGES+1));
134 if (ext == 0)
135 return (ENOMEM);
136 p->p_addr->u_pcb.pcb_ext = ext;
137 bzero(ext, sizeof(struct pcb_ext));
138 ext->ext_tss.tss_esp0 = (unsigned)p->p_addr + ctob(UPAGES) - 16;
139 ext->ext_tss.tss_ss0 = GSEL(GDATA_SEL, SEL_KPL);
139 ext->ext_tss.tss_ss0 = GSEL(GDATA_SEL, SEL_KPL);
140 /*
141 * The last byte of the i/o map must be followed by an 0xff byte.
142 * We arbitrarily allocate 16 bytes here, to keep the starting
143 * address on a doubleword boundary.
144 */
145 offset = PAGE_SIZE - 16;
146 ext->ext_tss.tss_ioopt =
147 (offset - ((unsigned)&ext->ext_tss - (unsigned)ext)) << 16;

--- 21 unchanged lines hidden (view full) ---

169{
170 int i, error;
171 struct i386_ioperm_args ua;
172 char *iomap;
173
174 if ((error = copyin(args, &ua, sizeof(struct i386_ioperm_args))) != 0)
175 return (error);
176
140 /*
141 * The last byte of the i/o map must be followed by an 0xff byte.
142 * We arbitrarily allocate 16 bytes here, to keep the starting
143 * address on a doubleword boundary.
144 */
145 offset = PAGE_SIZE - 16;
146 ext->ext_tss.tss_ioopt =
147 (offset - ((unsigned)&ext->ext_tss - (unsigned)ext)) << 16;

--- 21 unchanged lines hidden (view full) ---

169{
170 int i, error;
171 struct i386_ioperm_args ua;
172 char *iomap;
173
174 if ((error = copyin(args, &ua, sizeof(struct i386_ioperm_args))) != 0)
175 return (error);
176
177 if ((error = suser(p)) != 0)
178 return (error);
177 if ((error = suser(p)) != 0)
178 return (error);
179 if (securelevel > 0)
180 return (EPERM);
181 /*
182 * XXX
183 * While this is restricted to root, we should probably figure out
184 * whether any other driver is using this i/o address, as so not to
185 * cause confusion. This probably requires a global 'usage registry'.
186 */

--- 55 unchanged lines hidden (view full) ---

242#ifdef USER_LDT
243/*
244 * Update the GDT entry pointing to the LDT to point to the LDT of the
245 * current process. Do not staticize.
246 */
247void
248set_user_ldt(struct pcb *pcb)
249{
179 if (securelevel > 0)
180 return (EPERM);
181 /*
182 * XXX
183 * While this is restricted to root, we should probably figure out
184 * whether any other driver is using this i/o address, as so not to
185 * cause confusion. This probably requires a global 'usage registry'.
186 */

--- 55 unchanged lines hidden (view full) ---

242#ifdef USER_LDT
243/*
244 * Update the GDT entry pointing to the LDT to point to the LDT of the
245 * current process. Do not staticize.
246 */
247void
248set_user_ldt(struct pcb *pcb)
249{
250 gdt_segs[GUSERLDT_SEL].ssd_base = (unsigned)pcb->pcb_ldt;
251 gdt_segs[GUSERLDT_SEL].ssd_limit = (pcb->pcb_ldt_len * sizeof(union descriptor)) - 1;
250 struct pcb_ldt *pcb_ldt;
251
252 if (pcb != curpcb)
253 return;
254
255 pcb_ldt = pcb->pcb_ldt;
252#ifdef SMP
256#ifdef SMP
253 ssdtosd(&gdt_segs[GUSERLDT_SEL], &gdt[cpuid * NGDT + GUSERLDT_SEL].sd);
257 gdt[cpuid * NGDT + GUSERLDT_SEL].sd = pcb_ldt->ldt_sd;
254#else
258#else
255 ssdtosd(&gdt_segs[GUSERLDT_SEL], &gdt[GUSERLDT_SEL].sd);
259 gdt[GUSERLDT_SEL].sd = pcb_ldt->ldt_sd;
256#endif
257 lldt(GSEL(GUSERLDT_SEL, SEL_KPL));
258 currentldt = GSEL(GUSERLDT_SEL, SEL_KPL);
259}
260
260#endif
261 lldt(GSEL(GUSERLDT_SEL, SEL_KPL));
262 currentldt = GSEL(GUSERLDT_SEL, SEL_KPL);
263}
264
265struct pcb_ldt *
266user_ldt_alloc(struct pcb *pcb, int len)
267{
268 struct pcb_ldt *pcb_ldt, *new_ldt;
269
270 MALLOC(new_ldt, struct pcb_ldt *, sizeof(struct pcb_ldt),
271 M_SUBPROC, M_WAITOK);
272 if (new_ldt == NULL)
273 return NULL;
274
275 new_ldt->ldt_len = len = NEW_MAX_LD(len);
276 new_ldt->ldt_base = (caddr_t)kmem_alloc(kernel_map,
277 len * sizeof(union descriptor));
278 if (new_ldt->ldt_base == NULL) {
279 FREE(new_ldt, M_SUBPROC);
280 return NULL;
281 }
282 new_ldt->ldt_refcnt = 1;
283 new_ldt->ldt_active = 0;
284
285 gdt_segs[GUSERLDT_SEL].ssd_base = (unsigned)new_ldt->ldt_base;
286 gdt_segs[GUSERLDT_SEL].ssd_limit = len * sizeof(union descriptor) - 1;
287 ssdtosd(&gdt_segs[GUSERLDT_SEL], &new_ldt->ldt_sd);
288
289 if ((pcb_ldt = pcb->pcb_ldt)) {
290 if (len > pcb_ldt->ldt_len)
291 len = pcb_ldt->ldt_len;
292 bcopy(pcb_ldt->ldt_base, new_ldt->ldt_base,
293 len * sizeof(union descriptor));
294 } else {
295 bcopy(ldt, new_ldt->ldt_base, sizeof(ldt));
296 }
297 return new_ldt;
298}
299
300void
301user_ldt_free(struct pcb *pcb)
302{
303 struct pcb_ldt *pcb_ldt = pcb->pcb_ldt;
304
305 if (pcb_ldt == NULL)
306 return;
307
308 if (pcb == curpcb) {
309 lldt(_default_ldt);
310 currentldt = _default_ldt;
311 }
312
313 if (--pcb_ldt->ldt_refcnt == 0) {
314 kmem_free(kernel_map, (vm_offset_t)pcb_ldt->ldt_base,
315 pcb_ldt->ldt_len * sizeof(union descriptor));
316 FREE(pcb_ldt, M_SUBPROC);
317 }
318 pcb->pcb_ldt = NULL;
319}
320
261static int
262i386_get_ldt(p, args)
263 struct proc *p;
264 char *args;
265{
266 int error = 0;
267 struct pcb *pcb = &p->p_addr->u_pcb;
321static int
322i386_get_ldt(p, args)
323 struct proc *p;
324 char *args;
325{
326 int error = 0;
327 struct pcb *pcb = &p->p_addr->u_pcb;
328 struct pcb_ldt *pcb_ldt = pcb->pcb_ldt;
268 int nldt, num;
269 union descriptor *lp;
270 int s;
271 struct i386_ldt_args ua, *uap = &ua;
272
273 if ((error = copyin(args, uap, sizeof(struct i386_ldt_args))) < 0)
274 return(error);
275
276#ifdef DEBUG
277 printf("i386_get_ldt: start=%d num=%d descs=%p\n",
278 uap->start, uap->num, (void *)uap->descs);
279#endif
280
281 /* verify range of LDTs exist */
282 if ((uap->start < 0) || (uap->num <= 0))
283 return(EINVAL);
284
285 s = splhigh();
286
329 int nldt, num;
330 union descriptor *lp;
331 int s;
332 struct i386_ldt_args ua, *uap = &ua;
333
334 if ((error = copyin(args, uap, sizeof(struct i386_ldt_args))) < 0)
335 return(error);
336
337#ifdef DEBUG
338 printf("i386_get_ldt: start=%d num=%d descs=%p\n",
339 uap->start, uap->num, (void *)uap->descs);
340#endif
341
342 /* verify range of LDTs exist */
343 if ((uap->start < 0) || (uap->num <= 0))
344 return(EINVAL);
345
346 s = splhigh();
347
287 if (pcb->pcb_ldt) {
288 nldt = pcb->pcb_ldt_len;
348 if (pcb_ldt) {
349 nldt = pcb_ldt->ldt_len;
289 num = min(uap->num, nldt);
350 num = min(uap->num, nldt);
290 lp = &((union descriptor *)(pcb->pcb_ldt))[uap->start];
351 lp = &((union descriptor *)(pcb_ldt->ldt_base))[uap->start];
291 } else {
292 nldt = sizeof(ldt)/sizeof(ldt[0]);
293 num = min(uap->num, nldt);
294 lp = &ldt[uap->start];
295 }
296 if (uap->start > nldt) {
297 splx(s);
298 return(EINVAL);

--- 8 unchanged lines hidden (view full) ---

307}
308
309static int
310i386_set_ldt(p, args)
311 struct proc *p;
312 char *args;
313{
314 int error = 0, i, n;
352 } else {
353 nldt = sizeof(ldt)/sizeof(ldt[0]);
354 num = min(uap->num, nldt);
355 lp = &ldt[uap->start];
356 }
357 if (uap->start > nldt) {
358 splx(s);
359 return(EINVAL);

--- 8 unchanged lines hidden (view full) ---

368}
369
370static int
371i386_set_ldt(p, args)
372 struct proc *p;
373 char *args;
374{
375 int error = 0, i, n;
315 int largest_ld;
376 int largest_ld;
316 struct pcb *pcb = &p->p_addr->u_pcb;
377 struct pcb *pcb = &p->p_addr->u_pcb;
378 struct pcb_ldt *pcb_ldt = pcb->pcb_ldt;
317 int s;
318 struct i386_ldt_args ua, *uap = &ua;
319
320 if ((error = copyin(args, uap, sizeof(struct i386_ldt_args))) < 0)
321 return(error);
322
323#ifdef DEBUG
324 printf("i386_set_ldt: start=%d num=%d descs=%p\n",
325 uap->start, uap->num, (void *)uap->descs);
326#endif
327
379 int s;
380 struct i386_ldt_args ua, *uap = &ua;
381
382 if ((error = copyin(args, uap, sizeof(struct i386_ldt_args))) < 0)
383 return(error);
384
385#ifdef DEBUG
386 printf("i386_set_ldt: start=%d num=%d descs=%p\n",
387 uap->start, uap->num, (void *)uap->descs);
388#endif
389
328 /* verify range of descriptors to modify */
329 if ((uap->start < 0) || (uap->start >= MAX_LD) || (uap->num < 0) ||
330 (uap->num > MAX_LD))
331 {
332 return(EINVAL);
333 }
334 largest_ld = uap->start + uap->num - 1;
335 if (largest_ld >= MAX_LD)
336 return(EINVAL);
337
338 /* allocate user ldt */
339 if (!pcb->pcb_ldt || (largest_ld >= pcb->pcb_ldt_len)) {
340 union descriptor *new_ldt = (union descriptor *)kmem_alloc(
341 kernel_map, SIZE_FROM_LARGEST_LD(largest_ld));
342 if (new_ldt == NULL) {
343 return ENOMEM;
344 }
345 if (pcb->pcb_ldt) {
346 bcopy(pcb->pcb_ldt, new_ldt, pcb->pcb_ldt_len
347 * sizeof(union descriptor));
348 kmem_free(kernel_map, (vm_offset_t)pcb->pcb_ldt,
349 pcb->pcb_ldt_len * sizeof(union descriptor));
350 } else {
351 bcopy(ldt, new_ldt, sizeof(ldt));
352 }
353 pcb->pcb_ldt = (caddr_t)new_ldt;
354 pcb->pcb_ldt_len = NEW_MAX_LD(largest_ld);
355 if (pcb == curpcb)
356 set_user_ldt(pcb);
357 }
390 /* verify range of descriptors to modify */
391 if ((uap->start < 0) || (uap->start >= MAX_LD) || (uap->num < 0) ||
392 (uap->num > MAX_LD))
393 {
394 return(EINVAL);
395 }
396 largest_ld = uap->start + uap->num - 1;
397 if (largest_ld >= MAX_LD)
398 return(EINVAL);
358
399
400 /* allocate user ldt */
401 if (!pcb_ldt || largest_ld >= pcb_ldt->ldt_len) {
402 struct pcb_ldt *new_ldt = user_ldt_alloc(pcb, largest_ld);
403 if (new_ldt == NULL)
404 return ENOMEM;
405 if (pcb_ldt) {
406 pcb_ldt->ldt_sd = new_ldt->ldt_sd;
407 kmem_free(kernel_map, (vm_offset_t)pcb_ldt->ldt_base,
408 pcb_ldt->ldt_len * sizeof(union descriptor));
409 pcb_ldt->ldt_base = new_ldt->ldt_base;
410 pcb_ldt->ldt_len = new_ldt->ldt_len;
411 FREE(new_ldt, M_SUBPROC);
412 } else
413 pcb->pcb_ldt = pcb_ldt = new_ldt;
414#ifdef SMP
415 /* signal other cpus to reload ldt */
416 smp_rendezvous(NULL, (void (*)(void *))set_user_ldt, NULL, pcb);
417#else
418 set_user_ldt(pcb);
419#endif
420 }
421
359 /* Check descriptors for access violations */
360 for (i = 0, n = uap->start; i < uap->num; i++, n++) {
361 union descriptor desc, *dp;
362 dp = &uap->descs[i];
363 error = copyin(dp, &desc, sizeof(union descriptor));
364 if (error)
365 return(error);
366
367 switch (desc.sd.sd_type) {
422 /* Check descriptors for access violations */
423 for (i = 0, n = uap->start; i < uap->num; i++, n++) {
424 union descriptor desc, *dp;
425 dp = &uap->descs[i];
426 error = copyin(dp, &desc, sizeof(union descriptor));
427 if (error)
428 return(error);
429
430 switch (desc.sd.sd_type) {
368 case SDT_SYSNULL: /* system null */
369 desc.sd.sd_p = 0;
370 break;
371 case SDT_SYS286TSS: /* system 286 TSS available */
372 case SDT_SYSLDT: /* system local descriptor table */
373 case SDT_SYS286BSY: /* system 286 TSS busy */
374 case SDT_SYSTASKGT: /* system task gate */
375 case SDT_SYS286IGT: /* system 286 interrupt gate */
376 case SDT_SYS286TGT: /* system 286 trap gate */
377 case SDT_SYSNULL2: /* undefined by Intel */
378 case SDT_SYS386TSS: /* system 386 TSS available */
379 case SDT_SYSNULL3: /* undefined by Intel */
380 case SDT_SYS386BSY: /* system 386 TSS busy */
381 case SDT_SYSNULL4: /* undefined by Intel */
382 case SDT_SYS386IGT: /* system 386 interrupt gate */
383 case SDT_SYS386TGT: /* system 386 trap gate */
384 case SDT_SYS286CGT: /* system 286 call gate */
385 case SDT_SYS386CGT: /* system 386 call gate */
386 /* I can't think of any reason to allow a user proc
387 * to create a segment of these types. They are
388 * for OS use only.
389 */
390 return EACCES;
391
392 /* memory segment types */
393 case SDT_MEMEC: /* memory execute only conforming */
394 case SDT_MEMEAC: /* memory execute only accessed conforming */
395 case SDT_MEMERC: /* memory execute read conforming */
396 case SDT_MEMERAC: /* memory execute read accessed conforming */
397 /* Must be "present" if executable and conforming. */
398 if (desc.sd.sd_p == 0)
399 return (EACCES);
400 break;
401 case SDT_MEMRO: /* memory read only */
402 case SDT_MEMROA: /* memory read only accessed */
403 case SDT_MEMRW: /* memory read write */
404 case SDT_MEMRWA: /* memory read write accessed */
405 case SDT_MEMROD: /* memory read only expand dwn limit */
406 case SDT_MEMRODA: /* memory read only expand dwn lim accessed */
407 case SDT_MEMRWD: /* memory read write expand dwn limit */
408 case SDT_MEMRWDA: /* memory read write expand dwn lim acessed */
409 case SDT_MEME: /* memory execute only */
410 case SDT_MEMEA: /* memory execute only accessed */
411 case SDT_MEMER: /* memory execute read */
412 case SDT_MEMERA: /* memory execute read accessed */
431 case SDT_SYSNULL: /* system null */
432 desc.sd.sd_p = 0;
413 break;
433 break;
434 case SDT_SYS286TSS: /* system 286 TSS available */
435 case SDT_SYSLDT: /* system local descriptor table */
436 case SDT_SYS286BSY: /* system 286 TSS busy */
437 case SDT_SYSTASKGT: /* system task gate */
438 case SDT_SYS286IGT: /* system 286 interrupt gate */
439 case SDT_SYS286TGT: /* system 286 trap gate */
440 case SDT_SYSNULL2: /* undefined by Intel */
441 case SDT_SYS386TSS: /* system 386 TSS available */
442 case SDT_SYSNULL3: /* undefined by Intel */
443 case SDT_SYS386BSY: /* system 386 TSS busy */
444 case SDT_SYSNULL4: /* undefined by Intel */
445 case SDT_SYS386IGT: /* system 386 interrupt gate */
446 case SDT_SYS386TGT: /* system 386 trap gate */
447 case SDT_SYS286CGT: /* system 286 call gate */
448 case SDT_SYS386CGT: /* system 386 call gate */
449 /* I can't think of any reason to allow a user proc
450 * to create a segment of these types. They are
451 * for OS use only.
452 */
453 return EACCES;
454
455 /* memory segment types */
456 case SDT_MEMEC: /* memory execute only conforming */
457 case SDT_MEMEAC: /* memory execute only accessed conforming */
458 case SDT_MEMERC: /* memory execute read conforming */
459 case SDT_MEMERAC: /* memory execute read accessed conforming */
460 /* Must be "present" if executable and conforming. */
461 if (desc.sd.sd_p == 0)
462 return (EACCES);
463 break;
464 case SDT_MEMRO: /* memory read only */
465 case SDT_MEMROA: /* memory read only accessed */
466 case SDT_MEMRW: /* memory read write */
467 case SDT_MEMRWA: /* memory read write accessed */
468 case SDT_MEMROD: /* memory read only expand dwn limit */
469 case SDT_MEMRODA: /* memory read only expand dwn lim accessed */
470 case SDT_MEMRWD: /* memory read write expand dwn limit */
471 case SDT_MEMRWDA: /* memory read write expand dwn lim acessed */
472 case SDT_MEME: /* memory execute only */
473 case SDT_MEMEA: /* memory execute only accessed */
474 case SDT_MEMER: /* memory execute read */
475 case SDT_MEMERA: /* memory execute read accessed */
476 break;
414 default:
415 return(EINVAL);
416 /*NOTREACHED*/
417 }
477 default:
478 return(EINVAL);
479 /*NOTREACHED*/
480 }
418
419 /* Only user (ring-3) descriptors may be present. */
420 if ((desc.sd.sd_p != 0) && (desc.sd.sd_dpl != SEL_UPL))
421 return (EACCES);
481
482 /* Only user (ring-3) descriptors may be present. */
483 if ((desc.sd.sd_p != 0) && (desc.sd.sd_dpl != SEL_UPL))
484 return (EACCES);
422 }
423
424 s = splhigh();
425
426 /* Fill in range */
485 }
486
487 s = splhigh();
488
489 /* Fill in range */
427 error = copyin(uap->descs,
428 &((union descriptor *)(pcb->pcb_ldt))[uap->start],
429 uap->num * sizeof(union descriptor));
430 if (!error)
431 p->p_retval[0] = uap->start;
490 error = copyin(uap->descs,
491 &((union descriptor *)(pcb_ldt->ldt_base))[uap->start],
492 uap->num * sizeof(union descriptor));
493 if (!error)
494 p->p_retval[0] = uap->start;
432
433 splx(s);
434 return(error);
435}
436#endif /* USER_LDT */
495
496 splx(s);
497 return(error);
498}
499#endif /* USER_LDT */