1 | /* |
2 | * Copyright (c) 2000-2016 Apple Inc. All rights reserved. |
3 | * |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
5 | * |
6 | * This file contains Original Code and/or Modifications of Original Code |
7 | * as defined in and that are subject to the Apple Public Source License |
8 | * Version 2.0 (the 'License'). You may not use this file except in |
9 | * compliance with the License. The rights granted to you under the License |
10 | * may not be used to create, or enable the creation or redistribution of, |
11 | * unlawful or unlicensed copies of an Apple operating system, or to |
12 | * circumvent, violate, or enable the circumvention or violation of, any |
13 | * terms of an Apple operating system software license agreement. |
14 | * |
15 | * Please obtain a copy of the License at |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
17 | * |
18 | * The Original Code and all software distributed under the License are |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
23 | * Please see the License for the specific language governing rights and |
24 | * limitations under the License. |
25 | * |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
27 | */ |
28 | /* |
29 | * @OSF_COPYRIGHT@ |
30 | */ |
31 | /* |
32 | * Mach Operating System |
33 | * Copyright (c) 1991,1990 Carnegie Mellon University |
34 | * All Rights Reserved. |
35 | * |
36 | * Permission to use, copy, modify and distribute this software and its |
37 | * documentation is hereby granted, provided that both the copyright |
38 | * notice and this permission notice appear in all copies of the |
39 | * software, derivative works or modified versions, and any portions |
40 | * thereof, and that both notices appear in supporting documentation. |
41 | * |
42 | * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" |
43 | * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR |
44 | * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. |
45 | * |
46 | * Carnegie Mellon requests users of this software to return to |
47 | * |
48 | * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU |
49 | * School of Computer Science |
50 | * Carnegie Mellon University |
51 | * Pittsburgh PA 15213-3890 |
52 | * |
53 | * any improvements or extensions that they make and grant Carnegie Mellon |
54 | * the rights to redistribute these changes. |
55 | */ |
56 | |
57 | #include <mach_debug.h> |
58 | #include <mach_ldebug.h> |
59 | |
60 | #include <sys/kdebug.h> |
61 | |
62 | #include <mach/kern_return.h> |
63 | #include <mach/thread_status.h> |
64 | #include <mach/vm_param.h> |
65 | |
66 | #include <kern/counters.h> |
67 | #include <kern/kalloc.h> |
68 | #include <kern/mach_param.h> |
69 | #include <kern/processor.h> |
70 | #include <kern/cpu_data.h> |
71 | #include <kern/cpu_number.h> |
72 | #include <kern/task.h> |
73 | #include <kern/thread.h> |
74 | #include <kern/sched_prim.h> |
75 | #include <kern/misc_protos.h> |
76 | #include <kern/assert.h> |
77 | #include <kern/spl.h> |
78 | #include <kern/machine.h> |
79 | #include <kern/kpc.h> |
80 | #include <ipc/ipc_port.h> |
81 | #include <vm/vm_kern.h> |
82 | #include <vm/vm_map.h> |
83 | #include <vm/pmap.h> |
84 | #include <vm/vm_protos.h> |
85 | |
86 | #include <i386/cpu_data.h> |
87 | #include <i386/cpu_number.h> |
88 | #include <i386/eflags.h> |
89 | #include <i386/proc_reg.h> |
90 | #include <i386/fpu.h> |
91 | #include <i386/misc_protos.h> |
92 | #include <i386/mp_desc.h> |
93 | #include <i386/thread.h> |
94 | #include <i386/machine_routines.h> |
95 | #include <i386/lapic.h> /* LAPIC_PMC_SWI_VECTOR */ |
96 | |
97 | #if HYPERVISOR |
98 | #include <kern/hv_support.h> |
99 | #endif |
100 | |
101 | /* |
102 | * Maps state flavor to number of words in the state: |
103 | */ |
104 | unsigned int _MachineStateCount[] = { |
105 | [x86_THREAD_STATE32] = x86_THREAD_STATE32_COUNT, |
106 | [x86_THREAD_STATE64] = x86_THREAD_STATE64_COUNT, |
107 | [x86_THREAD_STATE] = x86_THREAD_STATE_COUNT, |
108 | [x86_FLOAT_STATE32] = x86_FLOAT_STATE32_COUNT, |
109 | [x86_FLOAT_STATE64] = x86_FLOAT_STATE64_COUNT, |
110 | [x86_FLOAT_STATE] = x86_FLOAT_STATE_COUNT, |
111 | [x86_EXCEPTION_STATE32] = x86_EXCEPTION_STATE32_COUNT, |
112 | [x86_EXCEPTION_STATE64] = x86_EXCEPTION_STATE64_COUNT, |
113 | [x86_EXCEPTION_STATE] = x86_EXCEPTION_STATE_COUNT, |
114 | [x86_DEBUG_STATE32] = x86_DEBUG_STATE32_COUNT, |
115 | [x86_DEBUG_STATE64] = x86_DEBUG_STATE64_COUNT, |
116 | [x86_DEBUG_STATE] = x86_DEBUG_STATE_COUNT, |
117 | [x86_AVX_STATE32] = x86_AVX_STATE32_COUNT, |
118 | [x86_AVX_STATE64] = x86_AVX_STATE64_COUNT, |
119 | [x86_AVX_STATE] = x86_AVX_STATE_COUNT, |
120 | #if !defined(RC_HIDE_XNU_J137) |
121 | [x86_AVX512_STATE32] = x86_AVX512_STATE32_COUNT, |
122 | [x86_AVX512_STATE64] = x86_AVX512_STATE64_COUNT, |
123 | [x86_AVX512_STATE] = x86_AVX512_STATE_COUNT, |
124 | #endif /* not RC_HIDE_XNU_J137 */ |
125 | }; |
126 | |
127 | zone_t iss_zone; /* zone for saved_state area */ |
128 | zone_t ids_zone; /* zone for debug_state area */ |
129 | |
130 | /* Forward */ |
131 | |
132 | extern void Thread_continue(void); |
133 | extern void Load_context( |
134 | thread_t thread) __attribute__((noreturn)); |
135 | |
136 | static void |
137 | get_exception_state32(thread_t thread, x86_exception_state32_t *es); |
138 | |
139 | static void |
140 | get_exception_state64(thread_t thread, x86_exception_state64_t *es); |
141 | |
142 | static void |
143 | get_thread_state32(thread_t thread, x86_thread_state32_t *ts); |
144 | |
145 | static void |
146 | get_thread_state64(thread_t thread, x86_thread_state64_t *ts); |
147 | |
148 | static int |
149 | set_thread_state32(thread_t thread, x86_thread_state32_t *ts); |
150 | |
151 | static int |
152 | set_thread_state64(thread_t thread, x86_thread_state64_t *ts); |
153 | |
154 | #if HYPERVISOR |
155 | static inline void |
156 | ml_hv_cswitch(thread_t old, thread_t new) |
157 | { |
158 | if (old->hv_thread_target) |
159 | hv_callbacks.preempt(old->hv_thread_target); |
160 | |
161 | if (new->hv_thread_target) |
162 | hv_callbacks.dispatch(new->hv_thread_target); |
163 | } |
164 | #endif |
165 | |
166 | /* |
167 | * Don't let an illegal value for the lower 32-bits of dr7 get set. |
168 | * Specifically, check for undefined settings. Setting these bit patterns |
169 | * result in undefined behaviour and can lead to an unexpected |
170 | * TRCTRAP. |
171 | */ |
172 | static boolean_t |
173 | dr7d_is_valid(uint32_t *dr7d) |
174 | { |
175 | int i; |
176 | uint32_t mask1, mask2; |
177 | |
178 | /* |
179 | * If the DE bit is set in CR4, R/W0-3 can be pattern |
180 | * "10B" to indicate i/o reads and write |
181 | */ |
182 | if (!(get_cr4() & CR4_DE)) |
183 | for (i = 0, mask1 = 0x3<<16, mask2 = 0x2<<16; i < 4; |
184 | i++, mask1 <<= 4, mask2 <<= 4) |
185 | if ((*dr7d & mask1) == mask2) |
186 | return (FALSE); |
187 | |
188 | /* |
189 | * if we are doing an instruction execution break (indicated |
190 | * by r/w[x] being "00B"), then the len[x] must also be set |
191 | * to "00B" |
192 | */ |
193 | for (i = 0; i < 4; i++) |
194 | if (((((*dr7d >> (16 + i*4))) & 0x3) == 0) && |
195 | ((((*dr7d >> (18 + i*4))) & 0x3) != 0)) |
196 | return (FALSE); |
197 | |
198 | /* |
199 | * Intel docs have these bits fixed. |
200 | */ |
201 | *dr7d |= 0x1 << 10; /* set bit 10 to 1 */ |
202 | *dr7d &= ~(0x1 << 11); /* set bit 11 to 0 */ |
203 | *dr7d &= ~(0x1 << 12); /* set bit 12 to 0 */ |
204 | *dr7d &= ~(0x1 << 14); /* set bit 14 to 0 */ |
205 | *dr7d &= ~(0x1 << 15); /* set bit 15 to 0 */ |
206 | |
207 | /* |
208 | * We don't allow anything to set the global breakpoints. |
209 | */ |
210 | |
211 | if (*dr7d & 0x2) |
212 | return (FALSE); |
213 | |
214 | if (*dr7d & (0x2<<2)) |
215 | return (FALSE); |
216 | |
217 | if (*dr7d & (0x2<<4)) |
218 | return (FALSE); |
219 | |
220 | if (*dr7d & (0x2<<6)) |
221 | return (FALSE); |
222 | |
223 | return (TRUE); |
224 | } |
225 | |
226 | extern void set_64bit_debug_regs(x86_debug_state64_t *ds); |
227 | |
228 | boolean_t |
229 | debug_state_is_valid32(x86_debug_state32_t *ds) |
230 | { |
231 | if (!dr7d_is_valid(&ds->dr7)) |
232 | return FALSE; |
233 | |
234 | return TRUE; |
235 | } |
236 | |
237 | boolean_t |
238 | debug_state_is_valid64(x86_debug_state64_t *ds) |
239 | { |
240 | if (!dr7d_is_valid((uint32_t *)&ds->dr7)) |
241 | return FALSE; |
242 | |
243 | /* |
244 | * Don't allow the user to set debug addresses above their max |
245 | * value |
246 | */ |
247 | if (ds->dr7 & 0x1) |
248 | if (ds->dr0 >= VM_MAX_PAGE_ADDRESS) |
249 | return FALSE; |
250 | |
251 | if (ds->dr7 & (0x1<<2)) |
252 | if (ds->dr1 >= VM_MAX_PAGE_ADDRESS) |
253 | return FALSE; |
254 | |
255 | if (ds->dr7 & (0x1<<4)) |
256 | if (ds->dr2 >= VM_MAX_PAGE_ADDRESS) |
257 | return FALSE; |
258 | |
259 | if (ds->dr7 & (0x1<<6)) |
260 | if (ds->dr3 >= VM_MAX_PAGE_ADDRESS) |
261 | return FALSE; |
262 | |
263 | /* For x86-64, we must ensure the upper 32-bits of DR7 are clear */ |
264 | ds->dr7 &= 0xffffffffULL; |
265 | |
266 | return TRUE; |
267 | } |
268 | |
269 | |
270 | static kern_return_t |
271 | set_debug_state32(thread_t thread, x86_debug_state32_t *ds) |
272 | { |
273 | x86_debug_state32_t *new_ids; |
274 | pcb_t pcb; |
275 | |
276 | pcb = THREAD_TO_PCB(thread); |
277 | |
278 | if (debug_state_is_valid32(ds) != TRUE) { |
279 | return KERN_INVALID_ARGUMENT; |
280 | } |
281 | |
282 | if (pcb->ids == NULL) { |
283 | new_ids = zalloc(ids_zone); |
284 | bzero(new_ids, sizeof *new_ids); |
285 | |
286 | simple_lock(&pcb->lock); |
287 | /* make sure it wasn't already alloc()'d elsewhere */ |
288 | if (pcb->ids == NULL) { |
289 | pcb->ids = new_ids; |
290 | simple_unlock(&pcb->lock); |
291 | } else { |
292 | simple_unlock(&pcb->lock); |
293 | zfree(ids_zone, new_ids); |
294 | } |
295 | } |
296 | |
297 | |
298 | copy_debug_state32(ds, pcb->ids, FALSE); |
299 | |
300 | return (KERN_SUCCESS); |
301 | } |
302 | |
303 | static kern_return_t |
304 | set_debug_state64(thread_t thread, x86_debug_state64_t *ds) |
305 | { |
306 | x86_debug_state64_t *new_ids; |
307 | pcb_t pcb; |
308 | |
309 | pcb = THREAD_TO_PCB(thread); |
310 | |
311 | if (debug_state_is_valid64(ds) != TRUE) { |
312 | return KERN_INVALID_ARGUMENT; |
313 | } |
314 | |
315 | if (pcb->ids == NULL) { |
316 | new_ids = zalloc(ids_zone); |
317 | bzero(new_ids, sizeof *new_ids); |
318 | |
319 | #if HYPERVISOR |
320 | if (thread->hv_thread_target) { |
321 | hv_callbacks.volatile_state(thread->hv_thread_target, |
322 | HV_DEBUG_STATE); |
323 | } |
324 | #endif |
325 | |
326 | simple_lock(&pcb->lock); |
327 | /* make sure it wasn't already alloc()'d elsewhere */ |
328 | if (pcb->ids == NULL) { |
329 | pcb->ids = new_ids; |
330 | simple_unlock(&pcb->lock); |
331 | } else { |
332 | simple_unlock(&pcb->lock); |
333 | zfree(ids_zone, new_ids); |
334 | } |
335 | } |
336 | |
337 | copy_debug_state64(ds, pcb->ids, FALSE); |
338 | |
339 | return (KERN_SUCCESS); |
340 | } |
341 | |
342 | static void |
343 | get_debug_state32(thread_t thread, x86_debug_state32_t *ds) |
344 | { |
345 | x86_debug_state32_t *saved_state; |
346 | |
347 | saved_state = thread->machine.ids; |
348 | |
349 | if (saved_state) { |
350 | copy_debug_state32(saved_state, ds, TRUE); |
351 | } else |
352 | bzero(ds, sizeof *ds); |
353 | } |
354 | |
355 | static void |
356 | get_debug_state64(thread_t thread, x86_debug_state64_t *ds) |
357 | { |
358 | x86_debug_state64_t *saved_state; |
359 | |
360 | saved_state = (x86_debug_state64_t *)thread->machine.ids; |
361 | |
362 | if (saved_state) { |
363 | copy_debug_state64(saved_state, ds, TRUE); |
364 | } else |
365 | bzero(ds, sizeof *ds); |
366 | } |
367 | |
368 | /* |
369 | * consider_machine_collect: |
370 | * |
371 | * Try to collect machine-dependent pages |
372 | */ |
373 | void |
374 | consider_machine_collect(void) |
375 | { |
376 | } |
377 | |
378 | void |
379 | consider_machine_adjust(void) |
380 | { |
381 | } |
382 | |
383 | /* |
384 | * Switch to the first thread on a CPU. |
385 | */ |
386 | void |
387 | machine_load_context( |
388 | thread_t new) |
389 | { |
390 | new->machine.specFlags |= OnProc; |
391 | act_machine_switch_pcb(NULL, new); |
392 | Load_context(new); |
393 | } |
394 | |
395 | static inline void pmap_switch_context(thread_t ot, thread_t nt, int cnum) { |
396 | pmap_assert(ml_get_interrupts_enabled() == FALSE); |
397 | vm_map_t nmap = nt->map, omap = ot->map; |
398 | if ((omap != nmap) || (nmap->pmap->pagezero_accessible)) { |
399 | PMAP_DEACTIVATE_MAP(omap, ot, cnum); |
400 | PMAP_ACTIVATE_MAP(nmap, nt, cnum); |
401 | } |
402 | } |
403 | |
404 | /* |
405 | * Switch to a new thread. |
406 | * Save the old thread`s kernel state or continuation, |
407 | * and return it. |
408 | */ |
409 | thread_t |
410 | machine_switch_context( |
411 | thread_t old, |
412 | thread_continue_t continuation, |
413 | thread_t new) |
414 | { |
415 | assert(current_cpu_datap()->cpu_active_stack == old->kernel_stack); |
416 | |
417 | #if KPC |
418 | kpc_off_cpu(old); |
419 | #endif /* KPC */ |
420 | |
421 | /* |
422 | * Save FP registers if in use. |
423 | */ |
424 | fpu_switch_context(old, new); |
425 | |
426 | old->machine.specFlags &= ~OnProc; |
427 | new->machine.specFlags |= OnProc; |
428 | |
429 | /* |
430 | * Monitor the stack depth and report new max, |
431 | * not worrying about races. |
432 | */ |
433 | vm_offset_t depth = current_stack_depth(); |
434 | if (depth > kernel_stack_depth_max) { |
435 | kernel_stack_depth_max = depth; |
436 | KERNEL_DEBUG_CONSTANT( |
437 | MACHDBG_CODE(DBG_MACH_SCHED, MACH_STACK_DEPTH), |
438 | (long) depth, 0, 0, 0, 0); |
439 | } |
440 | |
441 | /* |
442 | * Switch address maps if need be, even if not switching tasks. |
443 | * (A server activation may be "borrowing" a client map.) |
444 | */ |
445 | pmap_switch_context(old, new, cpu_number()); |
446 | |
447 | /* |
448 | * Load the rest of the user state for the new thread |
449 | */ |
450 | act_machine_switch_pcb(old, new); |
451 | |
452 | #if HYPERVISOR |
453 | ml_hv_cswitch(old, new); |
454 | #endif |
455 | |
456 | return(Switch_context(old, continuation, new)); |
457 | } |
458 | |
459 | thread_t |
460 | machine_processor_shutdown( |
461 | thread_t thread, |
462 | void (*doshutdown)(processor_t), |
463 | processor_t processor) |
464 | { |
465 | #if CONFIG_VMX |
466 | vmx_suspend(); |
467 | #endif |
468 | fpu_switch_context(thread, NULL); |
469 | pmap_switch_context(thread, processor->idle_thread, cpu_number()); |
470 | return(Shutdown_context(thread, doshutdown, processor)); |
471 | } |
472 | |
473 | |
474 | /* |
475 | * This is where registers that are not normally specified by the mach-o |
476 | * file on an execve would be nullified, perhaps to avoid a covert channel. |
477 | */ |
478 | kern_return_t |
479 | machine_thread_state_initialize( |
480 | thread_t thread) |
481 | { |
482 | /* |
483 | * If there's an fpu save area, free it. |
484 | * The initialized state will then be lazily faulted-in, if required. |
485 | * And if we're target, re-arm the no-fpu trap. |
486 | */ |
487 | if (thread->machine.ifps) { |
488 | (void) fpu_set_fxstate(thread, NULL, x86_FLOAT_STATE64); |
489 | |
490 | if (thread == current_thread()) |
491 | clear_fpu(); |
492 | } |
493 | |
494 | if (thread->machine.ids) { |
495 | zfree(ids_zone, thread->machine.ids); |
496 | thread->machine.ids = NULL; |
497 | } |
498 | |
499 | return KERN_SUCCESS; |
500 | } |
501 | |
502 | uint32_t |
503 | get_eflags_exportmask(void) |
504 | { |
505 | return EFL_USER_SET; |
506 | } |
507 | |
508 | /* |
509 | * x86_SAVED_STATE32 - internal save/restore general register state on 32/64 bit processors |
510 | * for 32bit tasks only |
511 | * x86_SAVED_STATE64 - internal save/restore general register state on 64 bit processors |
512 | * for 64bit tasks only |
513 | * x86_THREAD_STATE32 - external set/get general register state on 32/64 bit processors |
514 | * for 32bit tasks only |
515 | * x86_THREAD_STATE64 - external set/get general register state on 64 bit processors |
516 | * for 64bit tasks only |
517 | * x86_SAVED_STATE - external set/get general register state on 32/64 bit processors |
518 | * for either 32bit or 64bit tasks |
519 | * x86_FLOAT_STATE32 - internal/external save/restore float and xmm state on 32/64 bit processors |
520 | * for 32bit tasks only |
521 | * x86_FLOAT_STATE64 - internal/external save/restore float and xmm state on 64 bit processors |
522 | * for 64bit tasks only |
523 | * x86_FLOAT_STATE - external save/restore float and xmm state on 32/64 bit processors |
524 | * for either 32bit or 64bit tasks |
525 | * x86_EXCEPTION_STATE32 - external get exception state on 32/64 bit processors |
526 | * for 32bit tasks only |
527 | * x86_EXCEPTION_STATE64 - external get exception state on 64 bit processors |
528 | * for 64bit tasks only |
529 | * x86_EXCEPTION_STATE - external get exception state on 323/64 bit processors |
530 | * for either 32bit or 64bit tasks |
531 | */ |
532 | |
533 | |
534 | static void |
535 | get_exception_state64(thread_t thread, x86_exception_state64_t *es) |
536 | { |
537 | x86_saved_state64_t *saved_state; |
538 | |
539 | saved_state = USER_REGS64(thread); |
540 | |
541 | es->trapno = saved_state->isf.trapno; |
542 | es->cpu = saved_state->isf.cpu; |
543 | es->err = (typeof(es->err))saved_state->isf.err; |
544 | es->faultvaddr = saved_state->cr2; |
545 | } |
546 | |
547 | static void |
548 | get_exception_state32(thread_t thread, x86_exception_state32_t *es) |
549 | { |
550 | x86_saved_state32_t *saved_state; |
551 | |
552 | saved_state = USER_REGS32(thread); |
553 | |
554 | es->trapno = saved_state->trapno; |
555 | es->cpu = saved_state->cpu; |
556 | es->err = saved_state->err; |
557 | es->faultvaddr = saved_state->cr2; |
558 | } |
559 | |
560 | |
561 | static int |
562 | set_thread_state32(thread_t thread, x86_thread_state32_t *ts) |
563 | { |
564 | x86_saved_state32_t *saved_state; |
565 | |
566 | pal_register_cache_state(thread, DIRTY); |
567 | |
568 | saved_state = USER_REGS32(thread); |
569 | |
570 | /* |
571 | * Scrub segment selector values: |
572 | */ |
573 | ts->cs = USER_CS; |
574 | /* |
575 | * On a 64 bit kernel, we always override the data segments, |
576 | * as the actual selector numbers have changed. This also |
577 | * means that we don't support setting the data segments |
578 | * manually any more. |
579 | */ |
580 | ts->ss = USER_DS; |
581 | ts->ds = USER_DS; |
582 | ts->es = USER_DS; |
583 | |
584 | /* Set GS to CTHREAD only if's been established */ |
585 | ts->gs = thread->machine.cthread_self ? USER_CTHREAD : NULL_SEG; |
586 | |
587 | /* Check segment selectors are safe */ |
588 | if (!valid_user_segment_selectors(ts->cs, |
589 | ts->ss, |
590 | ts->ds, |
591 | ts->es, |
592 | ts->fs, |
593 | ts->gs)) |
594 | return(KERN_INVALID_ARGUMENT); |
595 | |
596 | saved_state->eax = ts->eax; |
597 | saved_state->ebx = ts->ebx; |
598 | saved_state->ecx = ts->ecx; |
599 | saved_state->edx = ts->edx; |
600 | saved_state->edi = ts->edi; |
601 | saved_state->esi = ts->esi; |
602 | saved_state->ebp = ts->ebp; |
603 | saved_state->uesp = ts->esp; |
604 | saved_state->efl = (ts->eflags & ~EFL_USER_CLEAR) | EFL_USER_SET; |
605 | saved_state->eip = ts->eip; |
606 | saved_state->cs = ts->cs; |
607 | saved_state->ss = ts->ss; |
608 | saved_state->ds = ts->ds; |
609 | saved_state->es = ts->es; |
610 | saved_state->fs = ts->fs; |
611 | saved_state->gs = ts->gs; |
612 | |
613 | /* |
614 | * If the trace trap bit is being set, |
615 | * ensure that the user returns via iret |
616 | * - which is signaled thusly: |
617 | */ |
618 | if ((saved_state->efl & EFL_TF) && saved_state->cs == SYSENTER_CS) |
619 | saved_state->cs = SYSENTER_TF_CS; |
620 | |
621 | return(KERN_SUCCESS); |
622 | } |
623 | |
624 | static int |
625 | set_thread_state64(thread_t thread, x86_thread_state64_t *ts) |
626 | { |
627 | x86_saved_state64_t *saved_state; |
628 | |
629 | pal_register_cache_state(thread, DIRTY); |
630 | |
631 | saved_state = USER_REGS64(thread); |
632 | |
633 | if (!IS_USERADDR64_CANONICAL(ts->rsp) || |
634 | !IS_USERADDR64_CANONICAL(ts->rip)) |
635 | return(KERN_INVALID_ARGUMENT); |
636 | |
637 | saved_state->r8 = ts->r8; |
638 | saved_state->r9 = ts->r9; |
639 | saved_state->r10 = ts->r10; |
640 | saved_state->r11 = ts->r11; |
641 | saved_state->r12 = ts->r12; |
642 | saved_state->r13 = ts->r13; |
643 | saved_state->r14 = ts->r14; |
644 | saved_state->r15 = ts->r15; |
645 | saved_state->rax = ts->rax; |
646 | saved_state->rbx = ts->rbx; |
647 | saved_state->rcx = ts->rcx; |
648 | saved_state->rdx = ts->rdx; |
649 | saved_state->rdi = ts->rdi; |
650 | saved_state->rsi = ts->rsi; |
651 | saved_state->rbp = ts->rbp; |
652 | saved_state->isf.rsp = ts->rsp; |
653 | saved_state->isf.rflags = (ts->rflags & ~EFL_USER_CLEAR) | EFL_USER_SET; |
654 | saved_state->isf.rip = ts->rip; |
655 | saved_state->isf.cs = USER64_CS; |
656 | saved_state->fs = (uint32_t)ts->fs; |
657 | saved_state->gs = (uint32_t)ts->gs; |
658 | |
659 | return(KERN_SUCCESS); |
660 | } |
661 | |
662 | |
663 | |
664 | static void |
665 | get_thread_state32(thread_t thread, x86_thread_state32_t *ts) |
666 | { |
667 | x86_saved_state32_t *saved_state; |
668 | |
669 | pal_register_cache_state(thread, VALID); |
670 | |
671 | saved_state = USER_REGS32(thread); |
672 | |
673 | ts->eax = saved_state->eax; |
674 | ts->ebx = saved_state->ebx; |
675 | ts->ecx = saved_state->ecx; |
676 | ts->edx = saved_state->edx; |
677 | ts->edi = saved_state->edi; |
678 | ts->esi = saved_state->esi; |
679 | ts->ebp = saved_state->ebp; |
680 | ts->esp = saved_state->uesp; |
681 | ts->eflags = saved_state->efl; |
682 | ts->eip = saved_state->eip; |
683 | ts->cs = saved_state->cs; |
684 | ts->ss = saved_state->ss; |
685 | ts->ds = saved_state->ds; |
686 | ts->es = saved_state->es; |
687 | ts->fs = saved_state->fs; |
688 | ts->gs = saved_state->gs; |
689 | } |
690 | |
691 | |
692 | static void |
693 | get_thread_state64(thread_t thread, x86_thread_state64_t *ts) |
694 | { |
695 | x86_saved_state64_t *saved_state; |
696 | |
697 | pal_register_cache_state(thread, VALID); |
698 | |
699 | saved_state = USER_REGS64(thread); |
700 | |
701 | ts->r8 = saved_state->r8; |
702 | ts->r9 = saved_state->r9; |
703 | ts->r10 = saved_state->r10; |
704 | ts->r11 = saved_state->r11; |
705 | ts->r12 = saved_state->r12; |
706 | ts->r13 = saved_state->r13; |
707 | ts->r14 = saved_state->r14; |
708 | ts->r15 = saved_state->r15; |
709 | ts->rax = saved_state->rax; |
710 | ts->rbx = saved_state->rbx; |
711 | ts->rcx = saved_state->rcx; |
712 | ts->rdx = saved_state->rdx; |
713 | ts->rdi = saved_state->rdi; |
714 | ts->rsi = saved_state->rsi; |
715 | ts->rbp = saved_state->rbp; |
716 | ts->rsp = saved_state->isf.rsp; |
717 | ts->rflags = saved_state->isf.rflags; |
718 | ts->rip = saved_state->isf.rip; |
719 | ts->cs = saved_state->isf.cs; |
720 | ts->fs = saved_state->fs; |
721 | ts->gs = saved_state->gs; |
722 | } |
723 | |
724 | kern_return_t |
725 | machine_thread_state_convert_to_user( |
726 | __unused thread_t thread, |
727 | __unused thread_flavor_t flavor, |
728 | __unused thread_state_t tstate, |
729 | __unused mach_msg_type_number_t *count) |
730 | { |
731 | // No conversion to userspace representation on this platform |
732 | return KERN_SUCCESS; |
733 | } |
734 | |
735 | kern_return_t |
736 | machine_thread_state_convert_from_user( |
737 | __unused thread_t thread, |
738 | __unused thread_flavor_t flavor, |
739 | __unused thread_state_t tstate, |
740 | __unused mach_msg_type_number_t count) |
741 | { |
742 | // No conversion from userspace representation on this platform |
743 | return KERN_SUCCESS; |
744 | } |
745 | |
746 | kern_return_t |
747 | machine_thread_siguctx_pointer_convert_to_user( |
748 | __unused thread_t thread, |
749 | __unused user_addr_t *uctxp) |
750 | { |
751 | // No conversion to userspace representation on this platform |
752 | return KERN_SUCCESS; |
753 | } |
754 | |
755 | kern_return_t |
756 | machine_thread_function_pointers_convert_from_user( |
757 | __unused thread_t thread, |
758 | __unused user_addr_t *fptrs, |
759 | __unused uint32_t count) |
760 | { |
761 | // No conversion from userspace representation on this platform |
762 | return KERN_SUCCESS; |
763 | } |
764 | |
765 | /* |
766 | * act_machine_set_state: |
767 | * |
768 | * Set the status of the specified thread. |
769 | */ |
770 | |
771 | kern_return_t |
772 | machine_thread_set_state( |
773 | thread_t thr_act, |
774 | thread_flavor_t flavor, |
775 | thread_state_t tstate, |
776 | mach_msg_type_number_t count) |
777 | { |
778 | switch (flavor) { |
779 | case x86_SAVED_STATE32: |
780 | { |
781 | x86_saved_state32_t *state; |
782 | x86_saved_state32_t *saved_state; |
783 | |
784 | if (count < x86_SAVED_STATE32_COUNT) |
785 | return(KERN_INVALID_ARGUMENT); |
786 | |
787 | if (thread_is_64bit_addr(thr_act)) |
788 | return(KERN_INVALID_ARGUMENT); |
789 | |
790 | state = (x86_saved_state32_t *) tstate; |
791 | |
792 | /* Check segment selectors are safe */ |
793 | if (!valid_user_segment_selectors(state->cs, |
794 | state->ss, |
795 | state->ds, |
796 | state->es, |
797 | state->fs, |
798 | state->gs)) |
799 | return KERN_INVALID_ARGUMENT; |
800 | |
801 | pal_register_cache_state(thr_act, DIRTY); |
802 | |
803 | saved_state = USER_REGS32(thr_act); |
804 | |
805 | /* |
806 | * General registers |
807 | */ |
808 | saved_state->edi = state->edi; |
809 | saved_state->esi = state->esi; |
810 | saved_state->ebp = state->ebp; |
811 | saved_state->uesp = state->uesp; |
812 | saved_state->ebx = state->ebx; |
813 | saved_state->edx = state->edx; |
814 | saved_state->ecx = state->ecx; |
815 | saved_state->eax = state->eax; |
816 | saved_state->eip = state->eip; |
817 | |
818 | saved_state->efl = (state->efl & ~EFL_USER_CLEAR) | EFL_USER_SET; |
819 | |
820 | /* |
821 | * If the trace trap bit is being set, |
822 | * ensure that the user returns via iret |
823 | * - which is signaled thusly: |
824 | */ |
825 | if ((saved_state->efl & EFL_TF) && state->cs == SYSENTER_CS) |
826 | state->cs = SYSENTER_TF_CS; |
827 | |
828 | /* |
829 | * User setting segment registers. |
830 | * Code and stack selectors have already been |
831 | * checked. Others will be reset by 'iret' |
832 | * if they are not valid. |
833 | */ |
834 | saved_state->cs = state->cs; |
835 | saved_state->ss = state->ss; |
836 | saved_state->ds = state->ds; |
837 | saved_state->es = state->es; |
838 | saved_state->fs = state->fs; |
839 | saved_state->gs = state->gs; |
840 | |
841 | break; |
842 | } |
843 | |
844 | case x86_SAVED_STATE64: |
845 | { |
846 | x86_saved_state64_t *state; |
847 | x86_saved_state64_t *saved_state; |
848 | |
849 | if (count < x86_SAVED_STATE64_COUNT) |
850 | return(KERN_INVALID_ARGUMENT); |
851 | |
852 | if (!thread_is_64bit_addr(thr_act)) |
853 | return(KERN_INVALID_ARGUMENT); |
854 | |
855 | state = (x86_saved_state64_t *) tstate; |
856 | |
857 | /* Verify that the supplied code segment selector is |
858 | * valid. In 64-bit mode, the FS and GS segment overrides |
859 | * use the FS.base and GS.base MSRs to calculate |
860 | * base addresses, and the trampolines don't directly |
861 | * restore the segment registers--hence they are no |
862 | * longer relevant for validation. |
863 | */ |
864 | if (!valid_user_code_selector(state->isf.cs)) |
865 | return KERN_INVALID_ARGUMENT; |
866 | |
867 | /* Check pc and stack are canonical addresses */ |
868 | if (!IS_USERADDR64_CANONICAL(state->isf.rsp) || |
869 | !IS_USERADDR64_CANONICAL(state->isf.rip)) |
870 | return KERN_INVALID_ARGUMENT; |
871 | |
872 | pal_register_cache_state(thr_act, DIRTY); |
873 | |
874 | saved_state = USER_REGS64(thr_act); |
875 | |
876 | /* |
877 | * General registers |
878 | */ |
879 | saved_state->r8 = state->r8; |
880 | saved_state->r9 = state->r9; |
881 | saved_state->r10 = state->r10; |
882 | saved_state->r11 = state->r11; |
883 | saved_state->r12 = state->r12; |
884 | saved_state->r13 = state->r13; |
885 | saved_state->r14 = state->r14; |
886 | saved_state->r15 = state->r15; |
887 | saved_state->rdi = state->rdi; |
888 | saved_state->rsi = state->rsi; |
889 | saved_state->rbp = state->rbp; |
890 | saved_state->rbx = state->rbx; |
891 | saved_state->rdx = state->rdx; |
892 | saved_state->rcx = state->rcx; |
893 | saved_state->rax = state->rax; |
894 | saved_state->isf.rsp = state->isf.rsp; |
895 | saved_state->isf.rip = state->isf.rip; |
896 | |
897 | saved_state->isf.rflags = (state->isf.rflags & ~EFL_USER_CLEAR) | EFL_USER_SET; |
898 | |
899 | /* |
900 | * User setting segment registers. |
901 | * Code and stack selectors have already been |
902 | * checked. Others will be reset by 'sys' |
903 | * if they are not valid. |
904 | */ |
905 | saved_state->isf.cs = state->isf.cs; |
906 | saved_state->isf.ss = state->isf.ss; |
907 | saved_state->fs = state->fs; |
908 | saved_state->gs = state->gs; |
909 | |
910 | break; |
911 | } |
912 | |
913 | case x86_FLOAT_STATE32: |
914 | case x86_AVX_STATE32: |
915 | #if !defined(RC_HIDE_XNU_J137) |
916 | case x86_AVX512_STATE32: |
917 | #endif /* not RC_HIDE_XNU_J137 */ |
918 | { |
919 | if (count != _MachineStateCount[flavor]) |
920 | return(KERN_INVALID_ARGUMENT); |
921 | |
922 | if (thread_is_64bit_addr(thr_act)) |
923 | return(KERN_INVALID_ARGUMENT); |
924 | |
925 | return fpu_set_fxstate(thr_act, tstate, flavor); |
926 | } |
927 | |
928 | case x86_FLOAT_STATE64: |
929 | case x86_AVX_STATE64: |
930 | #if !defined(RC_HIDE_XNU_J137) |
931 | case x86_AVX512_STATE64: |
932 | #endif /* not RC_HIDE_XNU_J137 */ |
933 | { |
934 | if (count != _MachineStateCount[flavor]) |
935 | return(KERN_INVALID_ARGUMENT); |
936 | |
937 | if (!thread_is_64bit_addr(thr_act)) |
938 | return(KERN_INVALID_ARGUMENT); |
939 | |
940 | return fpu_set_fxstate(thr_act, tstate, flavor); |
941 | } |
942 | |
943 | case x86_FLOAT_STATE: |
944 | { |
945 | x86_float_state_t *state; |
946 | |
947 | if (count != x86_FLOAT_STATE_COUNT) |
948 | return(KERN_INVALID_ARGUMENT); |
949 | |
950 | state = (x86_float_state_t *)tstate; |
951 | if (state->fsh.flavor == x86_FLOAT_STATE64 && state->fsh.count == x86_FLOAT_STATE64_COUNT && |
952 | thread_is_64bit_addr(thr_act)) { |
953 | return fpu_set_fxstate(thr_act, (thread_state_t)&state->ufs.fs64, x86_FLOAT_STATE64); |
954 | } |
955 | if (state->fsh.flavor == x86_FLOAT_STATE32 && state->fsh.count == x86_FLOAT_STATE32_COUNT && |
956 | !thread_is_64bit_addr(thr_act)) { |
957 | return fpu_set_fxstate(thr_act, (thread_state_t)&state->ufs.fs32, x86_FLOAT_STATE32); |
958 | } |
959 | return(KERN_INVALID_ARGUMENT); |
960 | } |
961 | |
962 | case x86_AVX_STATE: |
963 | #if !defined(RC_HIDE_XNU_J137) |
964 | case x86_AVX512_STATE: |
965 | #endif |
966 | { |
967 | x86_avx_state_t *state; |
968 | |
969 | if (count != _MachineStateCount[flavor]) |
970 | return(KERN_INVALID_ARGUMENT); |
971 | |
972 | state = (x86_avx_state_t *)tstate; |
973 | /* Flavors are defined to have sequential values: 32-bit, 64-bit, non-specific */ |
974 | /* 64-bit flavor? */ |
975 | if (state->ash.flavor == (flavor - 1) && |
976 | state->ash.count == _MachineStateCount[flavor - 1] && |
977 | thread_is_64bit_addr(thr_act)) { |
978 | return fpu_set_fxstate(thr_act, |
979 | (thread_state_t)&state->ufs.as64, |
980 | flavor - 1); |
981 | } |
982 | /* 32-bit flavor? */ |
983 | if (state->ash.flavor == (flavor - 2) && |
984 | state->ash.count == _MachineStateCount[flavor - 2] && |
985 | !thread_is_64bit_addr(thr_act)) { |
986 | return fpu_set_fxstate(thr_act, |
987 | (thread_state_t)&state->ufs.as32, |
988 | flavor - 2); |
989 | } |
990 | return(KERN_INVALID_ARGUMENT); |
991 | } |
992 | |
993 | case x86_THREAD_STATE32: |
994 | { |
995 | if (count != x86_THREAD_STATE32_COUNT) |
996 | return(KERN_INVALID_ARGUMENT); |
997 | |
998 | if (thread_is_64bit_addr(thr_act)) |
999 | return(KERN_INVALID_ARGUMENT); |
1000 | |
1001 | return set_thread_state32(thr_act, (x86_thread_state32_t *)tstate); |
1002 | } |
1003 | |
1004 | case x86_THREAD_STATE64: |
1005 | { |
1006 | if (count != x86_THREAD_STATE64_COUNT) |
1007 | return(KERN_INVALID_ARGUMENT); |
1008 | |
1009 | if (!thread_is_64bit_addr(thr_act)) |
1010 | return(KERN_INVALID_ARGUMENT); |
1011 | |
1012 | return set_thread_state64(thr_act, (x86_thread_state64_t *)tstate); |
1013 | |
1014 | } |
1015 | case x86_THREAD_STATE: |
1016 | { |
1017 | x86_thread_state_t *state; |
1018 | |
1019 | if (count != x86_THREAD_STATE_COUNT) |
1020 | return(KERN_INVALID_ARGUMENT); |
1021 | |
1022 | state = (x86_thread_state_t *)tstate; |
1023 | |
1024 | if (state->tsh.flavor == x86_THREAD_STATE64 && |
1025 | state->tsh.count == x86_THREAD_STATE64_COUNT && |
1026 | thread_is_64bit_addr(thr_act)) { |
1027 | return set_thread_state64(thr_act, &state->uts.ts64); |
1028 | } else if (state->tsh.flavor == x86_THREAD_STATE32 && |
1029 | state->tsh.count == x86_THREAD_STATE32_COUNT && |
1030 | !thread_is_64bit_addr(thr_act)) { |
1031 | return set_thread_state32(thr_act, &state->uts.ts32); |
1032 | } else |
1033 | return(KERN_INVALID_ARGUMENT); |
1034 | } |
1035 | case x86_DEBUG_STATE32: |
1036 | { |
1037 | x86_debug_state32_t *state; |
1038 | kern_return_t ret; |
1039 | |
1040 | if (thread_is_64bit_addr(thr_act)) |
1041 | return(KERN_INVALID_ARGUMENT); |
1042 | |
1043 | state = (x86_debug_state32_t *)tstate; |
1044 | |
1045 | ret = set_debug_state32(thr_act, state); |
1046 | |
1047 | return ret; |
1048 | } |
1049 | case x86_DEBUG_STATE64: |
1050 | { |
1051 | x86_debug_state64_t *state; |
1052 | kern_return_t ret; |
1053 | |
1054 | if (!thread_is_64bit_addr(thr_act)) |
1055 | return(KERN_INVALID_ARGUMENT); |
1056 | |
1057 | state = (x86_debug_state64_t *)tstate; |
1058 | |
1059 | ret = set_debug_state64(thr_act, state); |
1060 | |
1061 | return ret; |
1062 | } |
1063 | case x86_DEBUG_STATE: |
1064 | { |
1065 | x86_debug_state_t *state; |
1066 | kern_return_t ret = KERN_INVALID_ARGUMENT; |
1067 | |
1068 | if (count != x86_DEBUG_STATE_COUNT) |
1069 | return (KERN_INVALID_ARGUMENT); |
1070 | |
1071 | state = (x86_debug_state_t *)tstate; |
1072 | if (state->dsh.flavor == x86_DEBUG_STATE64 && |
1073 | state->dsh.count == x86_DEBUG_STATE64_COUNT && |
1074 | thread_is_64bit_addr(thr_act)) { |
1075 | ret = set_debug_state64(thr_act, &state->uds.ds64); |
1076 | } |
1077 | else |
1078 | if (state->dsh.flavor == x86_DEBUG_STATE32 && |
1079 | state->dsh.count == x86_DEBUG_STATE32_COUNT && |
1080 | !thread_is_64bit_addr(thr_act)) { |
1081 | ret = set_debug_state32(thr_act, &state->uds.ds32); |
1082 | } |
1083 | return ret; |
1084 | } |
1085 | default: |
1086 | return(KERN_INVALID_ARGUMENT); |
1087 | } |
1088 | |
1089 | return(KERN_SUCCESS); |
1090 | } |
1091 | |
1092 | |
1093 | |
1094 | /* |
1095 | * thread_getstatus: |
1096 | * |
1097 | * Get the status of the specified thread. |
1098 | */ |
1099 | |
1100 | kern_return_t |
1101 | machine_thread_get_state( |
1102 | thread_t thr_act, |
1103 | thread_flavor_t flavor, |
1104 | thread_state_t tstate, |
1105 | mach_msg_type_number_t *count) |
1106 | { |
1107 | |
1108 | switch (flavor) { |
1109 | |
1110 | case THREAD_STATE_FLAVOR_LIST: |
1111 | { |
1112 | if (*count < 3) |
1113 | return (KERN_INVALID_ARGUMENT); |
1114 | |
1115 | tstate[0] = i386_THREAD_STATE; |
1116 | tstate[1] = i386_FLOAT_STATE; |
1117 | tstate[2] = i386_EXCEPTION_STATE; |
1118 | |
1119 | *count = 3; |
1120 | break; |
1121 | } |
1122 | |
1123 | case THREAD_STATE_FLAVOR_LIST_NEW: |
1124 | { |
1125 | if (*count < 4) |
1126 | return (KERN_INVALID_ARGUMENT); |
1127 | |
1128 | tstate[0] = x86_THREAD_STATE; |
1129 | tstate[1] = x86_FLOAT_STATE; |
1130 | tstate[2] = x86_EXCEPTION_STATE; |
1131 | tstate[3] = x86_DEBUG_STATE; |
1132 | |
1133 | *count = 4; |
1134 | break; |
1135 | } |
1136 | |
1137 | case THREAD_STATE_FLAVOR_LIST_10_9: |
1138 | { |
1139 | if (*count < 5) |
1140 | return (KERN_INVALID_ARGUMENT); |
1141 | |
1142 | tstate[0] = x86_THREAD_STATE; |
1143 | tstate[1] = x86_FLOAT_STATE; |
1144 | tstate[2] = x86_EXCEPTION_STATE; |
1145 | tstate[3] = x86_DEBUG_STATE; |
1146 | tstate[4] = x86_AVX_STATE; |
1147 | |
1148 | *count = 5; |
1149 | break; |
1150 | } |
1151 | |
1152 | #if !defined(RC_HIDE_XNU_J137) |
1153 | case THREAD_STATE_FLAVOR_LIST_10_13: |
1154 | { |
1155 | if (*count < 6) |
1156 | return (KERN_INVALID_ARGUMENT); |
1157 | |
1158 | tstate[0] = x86_THREAD_STATE; |
1159 | tstate[1] = x86_FLOAT_STATE; |
1160 | tstate[2] = x86_EXCEPTION_STATE; |
1161 | tstate[3] = x86_DEBUG_STATE; |
1162 | tstate[4] = x86_AVX_STATE; |
1163 | tstate[5] = x86_AVX512_STATE; |
1164 | |
1165 | *count = 6; |
1166 | break; |
1167 | } |
1168 | |
1169 | #endif |
1170 | case x86_SAVED_STATE32: |
1171 | { |
1172 | x86_saved_state32_t *state; |
1173 | x86_saved_state32_t *saved_state; |
1174 | |
1175 | if (*count < x86_SAVED_STATE32_COUNT) |
1176 | return(KERN_INVALID_ARGUMENT); |
1177 | |
1178 | if (thread_is_64bit_addr(thr_act)) |
1179 | return(KERN_INVALID_ARGUMENT); |
1180 | |
1181 | state = (x86_saved_state32_t *) tstate; |
1182 | saved_state = USER_REGS32(thr_act); |
1183 | |
1184 | /* |
1185 | * First, copy everything: |
1186 | */ |
1187 | *state = *saved_state; |
1188 | state->ds = saved_state->ds & 0xffff; |
1189 | state->es = saved_state->es & 0xffff; |
1190 | state->fs = saved_state->fs & 0xffff; |
1191 | state->gs = saved_state->gs & 0xffff; |
1192 | |
1193 | *count = x86_SAVED_STATE32_COUNT; |
1194 | break; |
1195 | } |
1196 | |
1197 | case x86_SAVED_STATE64: |
1198 | { |
1199 | x86_saved_state64_t *state; |
1200 | x86_saved_state64_t *saved_state; |
1201 | |
1202 | if (*count < x86_SAVED_STATE64_COUNT) |
1203 | return(KERN_INVALID_ARGUMENT); |
1204 | |
1205 | if (!thread_is_64bit_addr(thr_act)) |
1206 | return(KERN_INVALID_ARGUMENT); |
1207 | |
1208 | state = (x86_saved_state64_t *)tstate; |
1209 | saved_state = USER_REGS64(thr_act); |
1210 | |
1211 | /* |
1212 | * First, copy everything: |
1213 | */ |
1214 | *state = *saved_state; |
1215 | state->fs = saved_state->fs & 0xffff; |
1216 | state->gs = saved_state->gs & 0xffff; |
1217 | |
1218 | *count = x86_SAVED_STATE64_COUNT; |
1219 | break; |
1220 | } |
1221 | |
1222 | case x86_FLOAT_STATE32: |
1223 | { |
1224 | if (*count < x86_FLOAT_STATE32_COUNT) |
1225 | return(KERN_INVALID_ARGUMENT); |
1226 | |
1227 | if (thread_is_64bit_addr(thr_act)) |
1228 | return(KERN_INVALID_ARGUMENT); |
1229 | |
1230 | *count = x86_FLOAT_STATE32_COUNT; |
1231 | |
1232 | return fpu_get_fxstate(thr_act, tstate, flavor); |
1233 | } |
1234 | |
1235 | case x86_FLOAT_STATE64: |
1236 | { |
1237 | if (*count < x86_FLOAT_STATE64_COUNT) |
1238 | return(KERN_INVALID_ARGUMENT); |
1239 | |
1240 | if ( !thread_is_64bit_addr(thr_act)) |
1241 | return(KERN_INVALID_ARGUMENT); |
1242 | |
1243 | *count = x86_FLOAT_STATE64_COUNT; |
1244 | |
1245 | return fpu_get_fxstate(thr_act, tstate, flavor); |
1246 | } |
1247 | |
1248 | case x86_FLOAT_STATE: |
1249 | { |
1250 | x86_float_state_t *state; |
1251 | kern_return_t kret; |
1252 | |
1253 | if (*count < x86_FLOAT_STATE_COUNT) |
1254 | return(KERN_INVALID_ARGUMENT); |
1255 | |
1256 | state = (x86_float_state_t *)tstate; |
1257 | |
1258 | /* |
1259 | * no need to bzero... currently |
1260 | * x86_FLOAT_STATE64_COUNT == x86_FLOAT_STATE32_COUNT |
1261 | */ |
1262 | if (thread_is_64bit_addr(thr_act)) { |
1263 | state->fsh.flavor = x86_FLOAT_STATE64; |
1264 | state->fsh.count = x86_FLOAT_STATE64_COUNT; |
1265 | |
1266 | kret = fpu_get_fxstate(thr_act, (thread_state_t)&state->ufs.fs64, x86_FLOAT_STATE64); |
1267 | } else { |
1268 | state->fsh.flavor = x86_FLOAT_STATE32; |
1269 | state->fsh.count = x86_FLOAT_STATE32_COUNT; |
1270 | |
1271 | kret = fpu_get_fxstate(thr_act, (thread_state_t)&state->ufs.fs32, x86_FLOAT_STATE32); |
1272 | } |
1273 | *count = x86_FLOAT_STATE_COUNT; |
1274 | |
1275 | return(kret); |
1276 | } |
1277 | |
1278 | case x86_AVX_STATE32: |
1279 | #if !defined(RC_HIDE_XNU_J137) |
1280 | case x86_AVX512_STATE32: |
1281 | #endif |
1282 | { |
1283 | if (*count != _MachineStateCount[flavor]) |
1284 | return(KERN_INVALID_ARGUMENT); |
1285 | |
1286 | if (thread_is_64bit_addr(thr_act)) |
1287 | return(KERN_INVALID_ARGUMENT); |
1288 | |
1289 | *count = _MachineStateCount[flavor]; |
1290 | |
1291 | return fpu_get_fxstate(thr_act, tstate, flavor); |
1292 | } |
1293 | |
1294 | case x86_AVX_STATE64: |
1295 | #if !defined(RC_HIDE_XNU_J137) |
1296 | case x86_AVX512_STATE64: |
1297 | #endif |
1298 | { |
1299 | if (*count != _MachineStateCount[flavor]) |
1300 | return(KERN_INVALID_ARGUMENT); |
1301 | |
1302 | if ( !thread_is_64bit_addr(thr_act)) |
1303 | return(KERN_INVALID_ARGUMENT); |
1304 | |
1305 | *count = _MachineStateCount[flavor]; |
1306 | |
1307 | return fpu_get_fxstate(thr_act, tstate, flavor); |
1308 | } |
1309 | |
1310 | case x86_AVX_STATE: |
1311 | #if !defined(RC_HIDE_XNU_J137) |
1312 | case x86_AVX512_STATE: |
1313 | #endif |
1314 | { |
1315 | x86_avx_state_t *state; |
1316 | thread_state_t fstate; |
1317 | |
1318 | if (*count < _MachineStateCount[flavor]) |
1319 | return(KERN_INVALID_ARGUMENT); |
1320 | |
1321 | *count = _MachineStateCount[flavor]; |
1322 | state = (x86_avx_state_t *)tstate; |
1323 | |
1324 | bzero((char *)state, *count * sizeof(int)); |
1325 | |
1326 | if (thread_is_64bit_addr(thr_act)) { |
1327 | flavor -= 1; /* 64-bit flavor */ |
1328 | fstate = (thread_state_t) &state->ufs.as64; |
1329 | } else { |
1330 | flavor -= 2; /* 32-bit flavor */ |
1331 | fstate = (thread_state_t) &state->ufs.as32; |
1332 | } |
1333 | state->ash.flavor = flavor; |
1334 | state->ash.count = _MachineStateCount[flavor]; |
1335 | |
1336 | return fpu_get_fxstate(thr_act, fstate, flavor); |
1337 | } |
1338 | |
1339 | case x86_THREAD_STATE32: |
1340 | { |
1341 | if (*count < x86_THREAD_STATE32_COUNT) |
1342 | return(KERN_INVALID_ARGUMENT); |
1343 | |
1344 | if (thread_is_64bit_addr(thr_act)) |
1345 | return(KERN_INVALID_ARGUMENT); |
1346 | |
1347 | *count = x86_THREAD_STATE32_COUNT; |
1348 | |
1349 | get_thread_state32(thr_act, (x86_thread_state32_t *)tstate); |
1350 | break; |
1351 | } |
1352 | |
1353 | case x86_THREAD_STATE64: |
1354 | { |
1355 | if (*count < x86_THREAD_STATE64_COUNT) |
1356 | return(KERN_INVALID_ARGUMENT); |
1357 | |
1358 | if ( !thread_is_64bit_addr(thr_act)) |
1359 | return(KERN_INVALID_ARGUMENT); |
1360 | |
1361 | *count = x86_THREAD_STATE64_COUNT; |
1362 | |
1363 | get_thread_state64(thr_act, (x86_thread_state64_t *)tstate); |
1364 | break; |
1365 | } |
1366 | |
1367 | case x86_THREAD_STATE: |
1368 | { |
1369 | x86_thread_state_t *state; |
1370 | |
1371 | if (*count < x86_THREAD_STATE_COUNT) |
1372 | return(KERN_INVALID_ARGUMENT); |
1373 | |
1374 | state = (x86_thread_state_t *)tstate; |
1375 | |
1376 | bzero((char *)state, sizeof(x86_thread_state_t)); |
1377 | |
1378 | if (thread_is_64bit_addr(thr_act)) { |
1379 | state->tsh.flavor = x86_THREAD_STATE64; |
1380 | state->tsh.count = x86_THREAD_STATE64_COUNT; |
1381 | |
1382 | get_thread_state64(thr_act, &state->uts.ts64); |
1383 | } else { |
1384 | state->tsh.flavor = x86_THREAD_STATE32; |
1385 | state->tsh.count = x86_THREAD_STATE32_COUNT; |
1386 | |
1387 | get_thread_state32(thr_act, &state->uts.ts32); |
1388 | } |
1389 | *count = x86_THREAD_STATE_COUNT; |
1390 | |
1391 | break; |
1392 | } |
1393 | |
1394 | |
1395 | case x86_EXCEPTION_STATE32: |
1396 | { |
1397 | if (*count < x86_EXCEPTION_STATE32_COUNT) |
1398 | return(KERN_INVALID_ARGUMENT); |
1399 | |
1400 | if (thread_is_64bit_addr(thr_act)) |
1401 | return(KERN_INVALID_ARGUMENT); |
1402 | |
1403 | *count = x86_EXCEPTION_STATE32_COUNT; |
1404 | |
1405 | get_exception_state32(thr_act, (x86_exception_state32_t *)tstate); |
1406 | /* |
1407 | * Suppress the cpu number for binary compatibility |
1408 | * of this deprecated state. |
1409 | */ |
1410 | ((x86_exception_state32_t *)tstate)->cpu = 0; |
1411 | break; |
1412 | } |
1413 | |
1414 | case x86_EXCEPTION_STATE64: |
1415 | { |
1416 | if (*count < x86_EXCEPTION_STATE64_COUNT) |
1417 | return(KERN_INVALID_ARGUMENT); |
1418 | |
1419 | if ( !thread_is_64bit_addr(thr_act)) |
1420 | return(KERN_INVALID_ARGUMENT); |
1421 | |
1422 | *count = x86_EXCEPTION_STATE64_COUNT; |
1423 | |
1424 | get_exception_state64(thr_act, (x86_exception_state64_t *)tstate); |
1425 | /* |
1426 | * Suppress the cpu number for binary compatibility |
1427 | * of this deprecated state. |
1428 | */ |
1429 | ((x86_exception_state64_t *)tstate)->cpu = 0; |
1430 | break; |
1431 | } |
1432 | |
1433 | case x86_EXCEPTION_STATE: |
1434 | { |
1435 | x86_exception_state_t *state; |
1436 | |
1437 | if (*count < x86_EXCEPTION_STATE_COUNT) |
1438 | return(KERN_INVALID_ARGUMENT); |
1439 | |
1440 | state = (x86_exception_state_t *)tstate; |
1441 | |
1442 | bzero((char *)state, sizeof(x86_exception_state_t)); |
1443 | |
1444 | if (thread_is_64bit_addr(thr_act)) { |
1445 | state->esh.flavor = x86_EXCEPTION_STATE64; |
1446 | state->esh.count = x86_EXCEPTION_STATE64_COUNT; |
1447 | |
1448 | get_exception_state64(thr_act, &state->ues.es64); |
1449 | } else { |
1450 | state->esh.flavor = x86_EXCEPTION_STATE32; |
1451 | state->esh.count = x86_EXCEPTION_STATE32_COUNT; |
1452 | |
1453 | get_exception_state32(thr_act, &state->ues.es32); |
1454 | } |
1455 | *count = x86_EXCEPTION_STATE_COUNT; |
1456 | |
1457 | break; |
1458 | } |
1459 | case x86_DEBUG_STATE32: |
1460 | { |
1461 | if (*count < x86_DEBUG_STATE32_COUNT) |
1462 | return(KERN_INVALID_ARGUMENT); |
1463 | |
1464 | if (thread_is_64bit_addr(thr_act)) |
1465 | return(KERN_INVALID_ARGUMENT); |
1466 | |
1467 | get_debug_state32(thr_act, (x86_debug_state32_t *)tstate); |
1468 | |
1469 | *count = x86_DEBUG_STATE32_COUNT; |
1470 | |
1471 | break; |
1472 | } |
1473 | case x86_DEBUG_STATE64: |
1474 | { |
1475 | if (*count < x86_DEBUG_STATE64_COUNT) |
1476 | return(KERN_INVALID_ARGUMENT); |
1477 | |
1478 | if (!thread_is_64bit_addr(thr_act)) |
1479 | return(KERN_INVALID_ARGUMENT); |
1480 | |
1481 | get_debug_state64(thr_act, (x86_debug_state64_t *)tstate); |
1482 | |
1483 | *count = x86_DEBUG_STATE64_COUNT; |
1484 | |
1485 | break; |
1486 | } |
1487 | case x86_DEBUG_STATE: |
1488 | { |
1489 | x86_debug_state_t *state; |
1490 | |
1491 | if (*count < x86_DEBUG_STATE_COUNT) |
1492 | return(KERN_INVALID_ARGUMENT); |
1493 | |
1494 | state = (x86_debug_state_t *)tstate; |
1495 | |
1496 | bzero(state, sizeof *state); |
1497 | |
1498 | if (thread_is_64bit_addr(thr_act)) { |
1499 | state->dsh.flavor = x86_DEBUG_STATE64; |
1500 | state->dsh.count = x86_DEBUG_STATE64_COUNT; |
1501 | |
1502 | get_debug_state64(thr_act, &state->uds.ds64); |
1503 | } else { |
1504 | state->dsh.flavor = x86_DEBUG_STATE32; |
1505 | state->dsh.count = x86_DEBUG_STATE32_COUNT; |
1506 | |
1507 | get_debug_state32(thr_act, &state->uds.ds32); |
1508 | } |
1509 | *count = x86_DEBUG_STATE_COUNT; |
1510 | break; |
1511 | } |
1512 | default: |
1513 | return(KERN_INVALID_ARGUMENT); |
1514 | } |
1515 | |
1516 | return(KERN_SUCCESS); |
1517 | } |
1518 | |
1519 | kern_return_t |
1520 | machine_thread_get_kern_state( |
1521 | thread_t thread, |
1522 | thread_flavor_t flavor, |
1523 | thread_state_t tstate, |
1524 | mach_msg_type_number_t *count) |
1525 | { |
1526 | x86_saved_state_t *int_state = current_cpu_datap()->cpu_int_state; |
1527 | |
1528 | /* |
1529 | * This works only for an interrupted kernel thread |
1530 | */ |
1531 | if (thread != current_thread() || int_state == NULL) |
1532 | return KERN_FAILURE; |
1533 | |
1534 | switch (flavor) { |
1535 | case x86_THREAD_STATE32: { |
1536 | x86_thread_state32_t *state; |
1537 | x86_saved_state32_t *saved_state; |
1538 | |
1539 | if (!is_saved_state32(int_state) || |
1540 | *count < x86_THREAD_STATE32_COUNT) |
1541 | return (KERN_INVALID_ARGUMENT); |
1542 | |
1543 | state = (x86_thread_state32_t *) tstate; |
1544 | |
1545 | saved_state = saved_state32(int_state); |
1546 | /* |
1547 | * General registers. |
1548 | */ |
1549 | state->eax = saved_state->eax; |
1550 | state->ebx = saved_state->ebx; |
1551 | state->ecx = saved_state->ecx; |
1552 | state->edx = saved_state->edx; |
1553 | state->edi = saved_state->edi; |
1554 | state->esi = saved_state->esi; |
1555 | state->ebp = saved_state->ebp; |
1556 | state->esp = saved_state->uesp; |
1557 | state->eflags = saved_state->efl; |
1558 | state->eip = saved_state->eip; |
1559 | state->cs = saved_state->cs; |
1560 | state->ss = saved_state->ss; |
1561 | state->ds = saved_state->ds & 0xffff; |
1562 | state->es = saved_state->es & 0xffff; |
1563 | state->fs = saved_state->fs & 0xffff; |
1564 | state->gs = saved_state->gs & 0xffff; |
1565 | |
1566 | *count = x86_THREAD_STATE32_COUNT; |
1567 | |
1568 | return KERN_SUCCESS; |
1569 | } |
1570 | |
1571 | case x86_THREAD_STATE64: { |
1572 | x86_thread_state64_t *state; |
1573 | x86_saved_state64_t *saved_state; |
1574 | |
1575 | if (!is_saved_state64(int_state) || |
1576 | *count < x86_THREAD_STATE64_COUNT) |
1577 | return (KERN_INVALID_ARGUMENT); |
1578 | |
1579 | state = (x86_thread_state64_t *) tstate; |
1580 | |
1581 | saved_state = saved_state64(int_state); |
1582 | /* |
1583 | * General registers. |
1584 | */ |
1585 | state->rax = saved_state->rax; |
1586 | state->rbx = saved_state->rbx; |
1587 | state->rcx = saved_state->rcx; |
1588 | state->rdx = saved_state->rdx; |
1589 | state->rdi = saved_state->rdi; |
1590 | state->rsi = saved_state->rsi; |
1591 | state->rbp = saved_state->rbp; |
1592 | state->rsp = saved_state->isf.rsp; |
1593 | state->r8 = saved_state->r8; |
1594 | state->r9 = saved_state->r9; |
1595 | state->r10 = saved_state->r10; |
1596 | state->r11 = saved_state->r11; |
1597 | state->r12 = saved_state->r12; |
1598 | state->r13 = saved_state->r13; |
1599 | state->r14 = saved_state->r14; |
1600 | state->r15 = saved_state->r15; |
1601 | |
1602 | state->rip = saved_state->isf.rip; |
1603 | state->rflags = saved_state->isf.rflags; |
1604 | state->cs = saved_state->isf.cs; |
1605 | state->fs = saved_state->fs & 0xffff; |
1606 | state->gs = saved_state->gs & 0xffff; |
1607 | *count = x86_THREAD_STATE64_COUNT; |
1608 | |
1609 | return KERN_SUCCESS; |
1610 | } |
1611 | |
1612 | case x86_THREAD_STATE: { |
1613 | x86_thread_state_t *state = NULL; |
1614 | |
1615 | if (*count < x86_THREAD_STATE_COUNT) |
1616 | return (KERN_INVALID_ARGUMENT); |
1617 | |
1618 | state = (x86_thread_state_t *) tstate; |
1619 | |
1620 | if (is_saved_state32(int_state)) { |
1621 | x86_saved_state32_t *saved_state = saved_state32(int_state); |
1622 | |
1623 | state->tsh.flavor = x86_THREAD_STATE32; |
1624 | state->tsh.count = x86_THREAD_STATE32_COUNT; |
1625 | |
1626 | /* |
1627 | * General registers. |
1628 | */ |
1629 | state->uts.ts32.eax = saved_state->eax; |
1630 | state->uts.ts32.ebx = saved_state->ebx; |
1631 | state->uts.ts32.ecx = saved_state->ecx; |
1632 | state->uts.ts32.edx = saved_state->edx; |
1633 | state->uts.ts32.edi = saved_state->edi; |
1634 | state->uts.ts32.esi = saved_state->esi; |
1635 | state->uts.ts32.ebp = saved_state->ebp; |
1636 | state->uts.ts32.esp = saved_state->uesp; |
1637 | state->uts.ts32.eflags = saved_state->efl; |
1638 | state->uts.ts32.eip = saved_state->eip; |
1639 | state->uts.ts32.cs = saved_state->cs; |
1640 | state->uts.ts32.ss = saved_state->ss; |
1641 | state->uts.ts32.ds = saved_state->ds & 0xffff; |
1642 | state->uts.ts32.es = saved_state->es & 0xffff; |
1643 | state->uts.ts32.fs = saved_state->fs & 0xffff; |
1644 | state->uts.ts32.gs = saved_state->gs & 0xffff; |
1645 | } else if (is_saved_state64(int_state)) { |
1646 | x86_saved_state64_t *saved_state = saved_state64(int_state); |
1647 | |
1648 | state->tsh.flavor = x86_THREAD_STATE64; |
1649 | state->tsh.count = x86_THREAD_STATE64_COUNT; |
1650 | |
1651 | /* |
1652 | * General registers. |
1653 | */ |
1654 | state->uts.ts64.rax = saved_state->rax; |
1655 | state->uts.ts64.rbx = saved_state->rbx; |
1656 | state->uts.ts64.rcx = saved_state->rcx; |
1657 | state->uts.ts64.rdx = saved_state->rdx; |
1658 | state->uts.ts64.rdi = saved_state->rdi; |
1659 | state->uts.ts64.rsi = saved_state->rsi; |
1660 | state->uts.ts64.rbp = saved_state->rbp; |
1661 | state->uts.ts64.rsp = saved_state->isf.rsp; |
1662 | state->uts.ts64.r8 = saved_state->r8; |
1663 | state->uts.ts64.r9 = saved_state->r9; |
1664 | state->uts.ts64.r10 = saved_state->r10; |
1665 | state->uts.ts64.r11 = saved_state->r11; |
1666 | state->uts.ts64.r12 = saved_state->r12; |
1667 | state->uts.ts64.r13 = saved_state->r13; |
1668 | state->uts.ts64.r14 = saved_state->r14; |
1669 | state->uts.ts64.r15 = saved_state->r15; |
1670 | |
1671 | state->uts.ts64.rip = saved_state->isf.rip; |
1672 | state->uts.ts64.rflags = saved_state->isf.rflags; |
1673 | state->uts.ts64.cs = saved_state->isf.cs; |
1674 | state->uts.ts64.fs = saved_state->fs & 0xffff; |
1675 | state->uts.ts64.gs = saved_state->gs & 0xffff; |
1676 | } else { |
1677 | panic("unknown thread state" ); |
1678 | } |
1679 | |
1680 | *count = x86_THREAD_STATE_COUNT; |
1681 | return KERN_SUCCESS; |
1682 | } |
1683 | } |
1684 | return KERN_FAILURE; |
1685 | } |
1686 | |
1687 | |
1688 | void |
1689 | machine_thread_switch_addrmode(thread_t thread) |
1690 | { |
1691 | /* |
1692 | * We don't want to be preempted until we're done |
1693 | * - particularly if we're switching the current thread |
1694 | */ |
1695 | disable_preemption(); |
1696 | |
1697 | /* |
1698 | * Reset the state saveareas. As we're resetting, we anticipate no |
1699 | * memory allocations in this path. |
1700 | */ |
1701 | machine_thread_create(thread, thread->task); |
1702 | |
1703 | /* Adjust FPU state */ |
1704 | fpu_switch_addrmode(thread, task_has_64Bit_addr(thread->task)); |
1705 | |
1706 | /* If we're switching ourselves, reset the pcb addresses etc. */ |
1707 | if (thread == current_thread()) { |
1708 | boolean_t istate = ml_set_interrupts_enabled(FALSE); |
1709 | act_machine_switch_pcb(NULL, thread); |
1710 | ml_set_interrupts_enabled(istate); |
1711 | } |
1712 | enable_preemption(); |
1713 | } |
1714 | |
1715 | |
1716 | |
1717 | /* |
1718 | * This is used to set the current thr_act/thread |
1719 | * when starting up a new processor |
1720 | */ |
1721 | void |
1722 | machine_set_current_thread(thread_t thread) |
1723 | { |
1724 | current_cpu_datap()->cpu_active_thread = thread; |
1725 | } |
1726 | |
1727 | |
1728 | /* |
1729 | * Perform machine-dependent per-thread initializations |
1730 | */ |
1731 | void |
1732 | machine_thread_init(void) |
1733 | { |
1734 | iss_zone = zinit(sizeof(x86_saved_state_t), |
1735 | thread_max * sizeof(x86_saved_state_t), |
1736 | THREAD_CHUNK * sizeof(x86_saved_state_t), |
1737 | "x86_64 saved state" ); |
1738 | |
1739 | ids_zone = zinit(sizeof(x86_debug_state64_t), |
1740 | thread_max * sizeof(x86_debug_state64_t), |
1741 | THREAD_CHUNK * sizeof(x86_debug_state64_t), |
1742 | "x86_64 debug state" ); |
1743 | |
1744 | fpu_module_init(); |
1745 | } |
1746 | |
1747 | |
1748 | |
1749 | user_addr_t |
1750 | get_useraddr(void) |
1751 | { |
1752 | thread_t thr_act = current_thread(); |
1753 | |
1754 | if (thread_is_64bit_addr(thr_act)) { |
1755 | x86_saved_state64_t *iss64; |
1756 | |
1757 | iss64 = USER_REGS64(thr_act); |
1758 | |
1759 | return(iss64->isf.rip); |
1760 | } else { |
1761 | x86_saved_state32_t *iss32; |
1762 | |
1763 | iss32 = USER_REGS32(thr_act); |
1764 | |
1765 | return(iss32->eip); |
1766 | } |
1767 | } |
1768 | |
1769 | /* |
1770 | * detach and return a kernel stack from a thread |
1771 | */ |
1772 | |
1773 | vm_offset_t |
1774 | machine_stack_detach(thread_t thread) |
1775 | { |
1776 | vm_offset_t stack; |
1777 | |
1778 | KERNEL_DEBUG(MACHDBG_CODE(DBG_MACH_SCHED, MACH_STACK_DETACH), |
1779 | (uintptr_t)thread_tid(thread), thread->priority, |
1780 | thread->sched_pri, 0, |
1781 | 0); |
1782 | |
1783 | stack = thread->kernel_stack; |
1784 | thread->kernel_stack = 0; |
1785 | |
1786 | return (stack); |
1787 | } |
1788 | |
1789 | /* |
1790 | * attach a kernel stack to a thread and initialize it |
1791 | */ |
1792 | |
1793 | void |
1794 | machine_stack_attach( |
1795 | thread_t thread, |
1796 | vm_offset_t stack) |
1797 | { |
1798 | struct x86_kernel_state *statep; |
1799 | |
1800 | KERNEL_DEBUG(MACHDBG_CODE(DBG_MACH_SCHED, MACH_STACK_ATTACH), |
1801 | (uintptr_t)thread_tid(thread), thread->priority, |
1802 | thread->sched_pri, 0, 0); |
1803 | |
1804 | assert(stack); |
1805 | thread->kernel_stack = stack; |
1806 | thread_initialize_kernel_state(thread); |
1807 | |
1808 | statep = STACK_IKS(stack); |
1809 | #if defined(__x86_64__) |
1810 | statep->k_rip = (unsigned long) Thread_continue; |
1811 | statep->k_rbx = (unsigned long) thread_continue; |
1812 | statep->k_rsp = (unsigned long) STACK_IKS(stack); |
1813 | #else |
1814 | statep->k_eip = (unsigned long) Thread_continue; |
1815 | statep->k_ebx = (unsigned long) thread_continue; |
1816 | statep->k_esp = (unsigned long) STACK_IKS(stack); |
1817 | #endif |
1818 | |
1819 | return; |
1820 | } |
1821 | |
1822 | /* |
1823 | * move a stack from old to new thread |
1824 | */ |
1825 | |
1826 | void |
1827 | machine_stack_handoff(thread_t old, |
1828 | thread_t new) |
1829 | { |
1830 | vm_offset_t stack; |
1831 | |
1832 | assert(new); |
1833 | assert(old); |
1834 | |
1835 | kpc_off_cpu(old); |
1836 | |
1837 | stack = old->kernel_stack; |
1838 | if (stack == old->reserved_stack) { |
1839 | assert(new->reserved_stack); |
1840 | old->reserved_stack = new->reserved_stack; |
1841 | new->reserved_stack = stack; |
1842 | } |
1843 | old->kernel_stack = 0; |
1844 | /* |
1845 | * A full call to machine_stack_attach() is unnecessry |
1846 | * because old stack is already initialized. |
1847 | */ |
1848 | new->kernel_stack = stack; |
1849 | |
1850 | fpu_switch_context(old, new); |
1851 | |
1852 | old->machine.specFlags &= ~OnProc; |
1853 | new->machine.specFlags |= OnProc; |
1854 | |
1855 | pmap_switch_context(old, new, cpu_number()); |
1856 | act_machine_switch_pcb(old, new); |
1857 | |
1858 | #if HYPERVISOR |
1859 | ml_hv_cswitch(old, new); |
1860 | #endif |
1861 | |
1862 | machine_set_current_thread(new); |
1863 | thread_initialize_kernel_state(new); |
1864 | |
1865 | return; |
1866 | } |
1867 | |
1868 | |
1869 | |
1870 | |
1871 | struct x86_act_context32 { |
1872 | x86_saved_state32_t ss; |
1873 | x86_float_state32_t fs; |
1874 | x86_debug_state32_t ds; |
1875 | }; |
1876 | |
1877 | struct x86_act_context64 { |
1878 | x86_saved_state64_t ss; |
1879 | x86_float_state64_t fs; |
1880 | x86_debug_state64_t ds; |
1881 | }; |
1882 | |
1883 | |
1884 | |
1885 | void * |
1886 | act_thread_csave(void) |
1887 | { |
1888 | kern_return_t kret; |
1889 | mach_msg_type_number_t val; |
1890 | thread_t thr_act = current_thread(); |
1891 | |
1892 | if (thread_is_64bit_addr(thr_act)) { |
1893 | struct x86_act_context64 *ic64; |
1894 | |
1895 | ic64 = (struct x86_act_context64 *)kalloc(sizeof(struct x86_act_context64)); |
1896 | |
1897 | if (ic64 == (struct x86_act_context64 *)NULL) |
1898 | return((void *)0); |
1899 | |
1900 | val = x86_SAVED_STATE64_COUNT; |
1901 | kret = machine_thread_get_state(thr_act, x86_SAVED_STATE64, |
1902 | (thread_state_t) &ic64->ss, &val); |
1903 | if (kret != KERN_SUCCESS) { |
1904 | kfree(ic64, sizeof(struct x86_act_context64)); |
1905 | return((void *)0); |
1906 | } |
1907 | val = x86_FLOAT_STATE64_COUNT; |
1908 | kret = machine_thread_get_state(thr_act, x86_FLOAT_STATE64, |
1909 | (thread_state_t) &ic64->fs, &val); |
1910 | if (kret != KERN_SUCCESS) { |
1911 | kfree(ic64, sizeof(struct x86_act_context64)); |
1912 | return((void *)0); |
1913 | } |
1914 | |
1915 | val = x86_DEBUG_STATE64_COUNT; |
1916 | kret = machine_thread_get_state(thr_act, |
1917 | x86_DEBUG_STATE64, |
1918 | (thread_state_t)&ic64->ds, |
1919 | &val); |
1920 | if (kret != KERN_SUCCESS) { |
1921 | kfree(ic64, sizeof(struct x86_act_context64)); |
1922 | return((void *)0); |
1923 | } |
1924 | return(ic64); |
1925 | |
1926 | } else { |
1927 | struct x86_act_context32 *ic32; |
1928 | |
1929 | ic32 = (struct x86_act_context32 *)kalloc(sizeof(struct x86_act_context32)); |
1930 | |
1931 | if (ic32 == (struct x86_act_context32 *)NULL) |
1932 | return((void *)0); |
1933 | |
1934 | val = x86_SAVED_STATE32_COUNT; |
1935 | kret = machine_thread_get_state(thr_act, x86_SAVED_STATE32, |
1936 | (thread_state_t) &ic32->ss, &val); |
1937 | if (kret != KERN_SUCCESS) { |
1938 | kfree(ic32, sizeof(struct x86_act_context32)); |
1939 | return((void *)0); |
1940 | } |
1941 | val = x86_FLOAT_STATE32_COUNT; |
1942 | kret = machine_thread_get_state(thr_act, x86_FLOAT_STATE32, |
1943 | (thread_state_t) &ic32->fs, &val); |
1944 | if (kret != KERN_SUCCESS) { |
1945 | kfree(ic32, sizeof(struct x86_act_context32)); |
1946 | return((void *)0); |
1947 | } |
1948 | |
1949 | val = x86_DEBUG_STATE32_COUNT; |
1950 | kret = machine_thread_get_state(thr_act, |
1951 | x86_DEBUG_STATE32, |
1952 | (thread_state_t)&ic32->ds, |
1953 | &val); |
1954 | if (kret != KERN_SUCCESS) { |
1955 | kfree(ic32, sizeof(struct x86_act_context32)); |
1956 | return((void *)0); |
1957 | } |
1958 | return(ic32); |
1959 | } |
1960 | } |
1961 | |
1962 | |
1963 | void |
1964 | act_thread_catt(void *ctx) |
1965 | { |
1966 | thread_t thr_act = current_thread(); |
1967 | kern_return_t kret; |
1968 | |
1969 | if (ctx == (void *)NULL) |
1970 | return; |
1971 | |
1972 | if (thread_is_64bit_addr(thr_act)) { |
1973 | struct x86_act_context64 *ic64; |
1974 | |
1975 | ic64 = (struct x86_act_context64 *)ctx; |
1976 | |
1977 | kret = machine_thread_set_state(thr_act, x86_SAVED_STATE64, |
1978 | (thread_state_t) &ic64->ss, x86_SAVED_STATE64_COUNT); |
1979 | if (kret == KERN_SUCCESS) { |
1980 | machine_thread_set_state(thr_act, x86_FLOAT_STATE64, |
1981 | (thread_state_t) &ic64->fs, x86_FLOAT_STATE64_COUNT); |
1982 | } |
1983 | kfree(ic64, sizeof(struct x86_act_context64)); |
1984 | } else { |
1985 | struct x86_act_context32 *ic32; |
1986 | |
1987 | ic32 = (struct x86_act_context32 *)ctx; |
1988 | |
1989 | kret = machine_thread_set_state(thr_act, x86_SAVED_STATE32, |
1990 | (thread_state_t) &ic32->ss, x86_SAVED_STATE32_COUNT); |
1991 | if (kret == KERN_SUCCESS) { |
1992 | (void) machine_thread_set_state(thr_act, x86_FLOAT_STATE32, |
1993 | (thread_state_t) &ic32->fs, x86_FLOAT_STATE32_COUNT); |
1994 | } |
1995 | kfree(ic32, sizeof(struct x86_act_context32)); |
1996 | } |
1997 | } |
1998 | |
1999 | |
2000 | void act_thread_cfree(__unused void *ctx) |
2001 | { |
2002 | /* XXX - Unused */ |
2003 | } |
2004 | |
2005 | /* |
2006 | * Duplicate one x86_debug_state32_t to another. "all" parameter |
2007 | * chooses whether dr4 and dr5 are copied (they are never meant |
2008 | * to be installed when we do machine_task_set_state() or |
2009 | * machine_thread_set_state()). |
2010 | */ |
2011 | void |
2012 | copy_debug_state32( |
2013 | x86_debug_state32_t *src, |
2014 | x86_debug_state32_t *target, |
2015 | boolean_t all) |
2016 | { |
2017 | if (all) { |
2018 | target->dr4 = src->dr4; |
2019 | target->dr5 = src->dr5; |
2020 | } |
2021 | |
2022 | target->dr0 = src->dr0; |
2023 | target->dr1 = src->dr1; |
2024 | target->dr2 = src->dr2; |
2025 | target->dr3 = src->dr3; |
2026 | target->dr6 = src->dr6; |
2027 | target->dr7 = src->dr7; |
2028 | } |
2029 | |
2030 | /* |
2031 | * Duplicate one x86_debug_state64_t to another. "all" parameter |
2032 | * chooses whether dr4 and dr5 are copied (they are never meant |
2033 | * to be installed when we do machine_task_set_state() or |
2034 | * machine_thread_set_state()). |
2035 | */ |
2036 | void |
2037 | copy_debug_state64( |
2038 | x86_debug_state64_t *src, |
2039 | x86_debug_state64_t *target, |
2040 | boolean_t all) |
2041 | { |
2042 | if (all) { |
2043 | target->dr4 = src->dr4; |
2044 | target->dr5 = src->dr5; |
2045 | } |
2046 | |
2047 | target->dr0 = src->dr0; |
2048 | target->dr1 = src->dr1; |
2049 | target->dr2 = src->dr2; |
2050 | target->dr3 = src->dr3; |
2051 | target->dr6 = src->dr6; |
2052 | target->dr7 = src->dr7; |
2053 | } |
2054 | |