1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1982, 1986 The Regents of the University of California.
5 * Copyright (c) 1989, 1990 William Jolitz
6 * Copyright (c) 1994 John Dyson
7 * All rights reserved.
8 *
9 * This code is derived from software contributed to Berkeley by
10 * the Systems Programming Group of the University of Utah Computer
11 * Science Department, and William Jolitz.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * from: @(#)vm_machdep.c 7.3 (Berkeley) 5/13/91
38 * Utah $Hdr: vm_machdep.c 1.16.1.1 89/06/23$
39 * from: src/sys/i386/i386/vm_machdep.c,v 1.132.2.2 2000/08/26 04:19:26 yokota
40 * JNPR: vm_machdep.c,v 1.8.2.2 2007/08/16 15:59:17 girish
41 */
42
43 #include <sys/cdefs.h>
44 __FBSDID("$FreeBSD$");
45
46 #include "opt_ddb.h"
47
48 #include <sys/param.h>
49 #include <sys/systm.h>
50 #include <sys/malloc.h>
51 #include <sys/proc.h>
52 #include <sys/syscall.h>
53 #include <sys/sysent.h>
54 #include <sys/buf.h>
55 #include <sys/vnode.h>
56 #include <sys/vmmeter.h>
57 #include <sys/kernel.h>
58 #include <sys/sysctl.h>
59 #include <sys/unistd.h>
60
61 #include <machine/abi.h>
62 #include <machine/cache.h>
63 #include <machine/clock.h>
64 #include <machine/cpu.h>
65 #include <machine/cpufunc.h>
66 #include <machine/cpuinfo.h>
67 #include <machine/md_var.h>
68 #include <machine/pcb.h>
69 #include <machine/tls.h>
70
71 #include <vm/vm.h>
72 #include <vm/vm_extern.h>
73 #include <vm/pmap.h>
74 #include <vm/vm_kern.h>
75 #include <vm/vm_map.h>
76 #include <vm/vm_page.h>
77 #include <vm/vm_pageout.h>
78 #include <vm/vm_param.h>
79 #include <vm/uma.h>
80 #include <vm/uma_int.h>
81
82 #include <sys/user.h>
83 #include <sys/mbuf.h>
84
85 /*
86 * Finish a fork operation, with process p2 nearly set up.
87 * Copy and update the pcb, set up the stack so that the child
88 * ready to run and return to user mode.
89 */
90 void
cpu_fork(struct thread * td1,struct proc * p2,struct thread * td2,int flags)91 cpu_fork(struct thread *td1, struct proc *p2, struct thread *td2, int flags)
92 {
93 struct pcb *pcb2;
94
95 if ((flags & RFPROC) == 0)
96 return;
97 /* It is assumed that the vm_thread_alloc called
98 * cpu_thread_alloc() before cpu_fork is called.
99 */
100
101 /* Point the pcb to the top of the stack */
102 pcb2 = td2->td_pcb;
103
104 /* Copy td1's pcb, note that in this case
105 * our pcb also includes the td_frame being copied
106 * too. The older mips2 code did an additional copy
107 * of the td_frame, for us that's not needed any
108 * longer (this copy does them both)
109 */
110 bcopy(td1->td_pcb, pcb2, sizeof(*pcb2));
111
112 /* Point mdproc and then copy over td1's contents
113 * md_proc is empty for MIPS
114 */
115 td2->td_md.md_flags = td1->td_md.md_flags & MDTD_FPUSED;
116
117 /*
118 * Set up return-value registers as fork() libc stub expects.
119 */
120 td2->td_frame->v0 = 0;
121 td2->td_frame->v1 = 1;
122 td2->td_frame->a3 = 0;
123
124 if (td1 == PCPU_GET(fpcurthread))
125 MipsSaveCurFPState(td1);
126
127 pcb2->pcb_context[PCB_REG_RA] = (register_t)(intptr_t)fork_trampoline;
128 /* Make sp 64-bit aligned */
129 pcb2->pcb_context[PCB_REG_SP] = (register_t)(((vm_offset_t)td2->td_pcb &
130 ~(sizeof(__int64_t) - 1)) - CALLFRAME_SIZ);
131 pcb2->pcb_context[PCB_REG_S0] = (register_t)(intptr_t)fork_return;
132 pcb2->pcb_context[PCB_REG_S1] = (register_t)(intptr_t)td2;
133 pcb2->pcb_context[PCB_REG_S2] = (register_t)(intptr_t)td2->td_frame;
134 pcb2->pcb_context[PCB_REG_SR] = mips_rd_status() &
135 (MIPS_SR_KX | MIPS_SR_UX | MIPS_SR_INT_MASK);
136 /*
137 * FREEBSD_DEVELOPERS_FIXME:
138 * Setup any other CPU-Specific registers (Not MIPS Standard)
139 * and/or bits in other standard MIPS registers (if CPU-Specific)
140 * that are needed.
141 */
142
143 td2->td_md.md_tls = td1->td_md.md_tls;
144 p2->p_md.md_tls_tcb_offset = td1->td_proc->p_md.md_tls_tcb_offset;
145 td2->td_md.md_saved_intr = MIPS_SR_INT_IE;
146 td2->td_md.md_spinlock_count = 1;
147 #ifdef CPU_CNMIPS
148 if (td1->td_md.md_flags & MDTD_COP2USED) {
149 if (td1->td_md.md_cop2owner == COP2_OWNER_USERLAND) {
150 if (td1->td_md.md_ucop2)
151 octeon_cop2_save(td1->td_md.md_ucop2);
152 else
153 panic("cpu_fork: ucop2 is NULL but COP2 is enabled");
154 }
155 else {
156 if (td1->td_md.md_cop2)
157 octeon_cop2_save(td1->td_md.md_cop2);
158 else
159 panic("cpu_fork: cop2 is NULL but COP2 is enabled");
160 }
161 }
162
163 if (td1->td_md.md_cop2) {
164 td2->td_md.md_cop2 = octeon_cop2_alloc_ctx();
165 memcpy(td2->td_md.md_cop2, td1->td_md.md_cop2,
166 sizeof(*td1->td_md.md_cop2));
167 }
168 if (td1->td_md.md_ucop2) {
169 td2->td_md.md_ucop2 = octeon_cop2_alloc_ctx();
170 memcpy(td2->td_md.md_ucop2, td1->td_md.md_ucop2,
171 sizeof(*td1->td_md.md_ucop2));
172 }
173 td2->td_md.md_cop2owner = td1->td_md.md_cop2owner;
174 pcb2->pcb_context[PCB_REG_SR] |= MIPS_SR_PX | MIPS_SR_UX | MIPS_SR_KX | MIPS_SR_SX;
175 /* Clear COP2 bits for userland & kernel */
176 td2->td_frame->sr &= ~MIPS_SR_COP_2_BIT;
177 pcb2->pcb_context[PCB_REG_SR] &= ~MIPS_SR_COP_2_BIT;
178 #endif
179 }
180
181 /*
182 * Intercept the return address from a freshly forked process that has NOT
183 * been scheduled yet.
184 *
185 * This is needed to make kernel threads stay in kernel mode.
186 */
187 void
cpu_fork_kthread_handler(struct thread * td,void (* func)(void *),void * arg)188 cpu_fork_kthread_handler(struct thread *td, void (*func)(void *), void *arg)
189 {
190 /*
191 * Note that the trap frame follows the args, so the function
192 * is really called like this: func(arg, frame);
193 */
194 td->td_pcb->pcb_context[PCB_REG_S0] = (register_t)(intptr_t)func;
195 td->td_pcb->pcb_context[PCB_REG_S1] = (register_t)(intptr_t)arg;
196 }
197
198 void
cpu_exit(struct thread * td)199 cpu_exit(struct thread *td)
200 {
201 }
202
203 void
cpu_thread_exit(struct thread * td)204 cpu_thread_exit(struct thread *td)
205 {
206
207 if (PCPU_GET(fpcurthread) == td)
208 PCPU_GET(fpcurthread) = (struct thread *)0;
209 #ifdef CPU_CNMIPS
210 if (td->td_md.md_cop2)
211 memset(td->td_md.md_cop2, 0,
212 sizeof(*td->td_md.md_cop2));
213 if (td->td_md.md_ucop2)
214 memset(td->td_md.md_ucop2, 0,
215 sizeof(*td->td_md.md_ucop2));
216 #endif
217 }
218
219 void
cpu_thread_free(struct thread * td)220 cpu_thread_free(struct thread *td)
221 {
222 #ifdef CPU_CNMIPS
223 if (td->td_md.md_cop2)
224 octeon_cop2_free_ctx(td->td_md.md_cop2);
225 if (td->td_md.md_ucop2)
226 octeon_cop2_free_ctx(td->td_md.md_ucop2);
227 td->td_md.md_cop2 = NULL;
228 td->td_md.md_ucop2 = NULL;
229 #endif
230 }
231
232 void
cpu_thread_clean(struct thread * td)233 cpu_thread_clean(struct thread *td)
234 {
235 }
236
237 void
cpu_thread_swapin(struct thread * td)238 cpu_thread_swapin(struct thread *td)
239 {
240 pt_entry_t *pte;
241 int i;
242
243 /*
244 * The kstack may be at a different physical address now.
245 * Cache the PTEs for the Kernel stack in the machine dependent
246 * part of the thread struct so cpu_switch() can quickly map in
247 * the pcb struct and kernel stack.
248 */
249 for (i = 0; i < KSTACK_PAGES; i++) {
250 pte = pmap_pte(kernel_pmap, td->td_kstack + i * PAGE_SIZE);
251 td->td_md.md_upte[i] = *pte & ~TLBLO_SWBITS_MASK;
252 }
253 }
254
255 void
cpu_thread_swapout(struct thread * td)256 cpu_thread_swapout(struct thread *td)
257 {
258 }
259
260 void
cpu_thread_alloc(struct thread * td)261 cpu_thread_alloc(struct thread *td)
262 {
263 pt_entry_t *pte;
264 int i;
265
266 KASSERT((td->td_kstack & (1 << PAGE_SHIFT)) == 0, ("kernel stack must be aligned."));
267 td->td_pcb = (struct pcb *)(td->td_kstack +
268 td->td_kstack_pages * PAGE_SIZE) - 1;
269 td->td_frame = &td->td_pcb->pcb_regs;
270
271 for (i = 0; i < KSTACK_PAGES; i++) {
272 pte = pmap_pte(kernel_pmap, td->td_kstack + i * PAGE_SIZE);
273 td->td_md.md_upte[i] = *pte & ~TLBLO_SWBITS_MASK;
274 }
275 }
276
277 void
cpu_set_syscall_retval(struct thread * td,int error)278 cpu_set_syscall_retval(struct thread *td, int error)
279 {
280 struct trapframe *locr0 = td->td_frame;
281 unsigned int code;
282 int quad_syscall;
283
284 code = locr0->v0;
285 quad_syscall = 0;
286 #if defined(__mips_n32) || defined(__mips_n64)
287 #ifdef COMPAT_FREEBSD32
288 if (code == SYS___syscall && SV_PROC_FLAG(td->td_proc, SV_ILP32))
289 quad_syscall = 1;
290 #endif
291 #else
292 if (code == SYS___syscall)
293 quad_syscall = 1;
294 #endif
295
296 if (code == SYS_syscall)
297 code = locr0->a0;
298 else if (code == SYS___syscall) {
299 if (quad_syscall)
300 code = _QUAD_LOWWORD ? locr0->a1 : locr0->a0;
301 else
302 code = locr0->a0;
303 }
304
305 switch (error) {
306 case 0:
307 if (quad_syscall && code != SYS_lseek) {
308 /*
309 * System call invoked through the
310 * SYS___syscall interface but the
311 * return value is really just 32
312 * bits.
313 */
314 locr0->v0 = td->td_retval[0];
315 if (_QUAD_LOWWORD)
316 locr0->v1 = td->td_retval[0];
317 locr0->a3 = 0;
318 } else {
319 locr0->v0 = td->td_retval[0];
320 locr0->v1 = td->td_retval[1];
321 locr0->a3 = 0;
322 }
323 break;
324
325 case ERESTART:
326 locr0->pc = td->td_pcb->pcb_tpc;
327 break;
328
329 case EJUSTRETURN:
330 break; /* nothing to do */
331
332 default:
333 if (quad_syscall && code != SYS_lseek) {
334 locr0->v0 = error;
335 if (_QUAD_LOWWORD)
336 locr0->v1 = error;
337 locr0->a3 = 1;
338 } else {
339 locr0->v0 = error;
340 locr0->a3 = 1;
341 }
342 }
343 }
344
345 /*
346 * Initialize machine state, mostly pcb and trap frame for a new
347 * thread, about to return to userspace. Put enough state in the new
348 * thread's PCB to get it to go back to the fork_return(), which
349 * finalizes the thread state and handles peculiarities of the first
350 * return to userspace for the new thread.
351 */
352 void
cpu_copy_thread(struct thread * td,struct thread * td0)353 cpu_copy_thread(struct thread *td, struct thread *td0)
354 {
355 struct pcb *pcb2;
356
357 /* Point the pcb to the top of the stack. */
358 pcb2 = td->td_pcb;
359
360 /*
361 * Copy the upcall pcb. This loads kernel regs.
362 * Those not loaded individually below get their default
363 * values here.
364 *
365 * XXXKSE It might be a good idea to simply skip this as
366 * the values of the other registers may be unimportant.
367 * This would remove any requirement for knowing the KSE
368 * at this time (see the matching comment below for
369 * more analysis) (need a good safe default).
370 * In MIPS, the trapframe is the first element of the PCB
371 * and gets copied when we copy the PCB. No separate copy
372 * is needed.
373 */
374 bcopy(td0->td_pcb, pcb2, sizeof(*pcb2));
375
376 /*
377 * Set registers for trampoline to user mode.
378 */
379
380 pcb2->pcb_context[PCB_REG_RA] = (register_t)(intptr_t)fork_trampoline;
381 /* Make sp 64-bit aligned */
382 pcb2->pcb_context[PCB_REG_SP] = (register_t)(((vm_offset_t)td->td_pcb &
383 ~(sizeof(__int64_t) - 1)) - CALLFRAME_SIZ);
384 pcb2->pcb_context[PCB_REG_S0] = (register_t)(intptr_t)fork_return;
385 pcb2->pcb_context[PCB_REG_S1] = (register_t)(intptr_t)td;
386 pcb2->pcb_context[PCB_REG_S2] = (register_t)(intptr_t)td->td_frame;
387 /* Dont set IE bit in SR. sched lock release will take care of it */
388 pcb2->pcb_context[PCB_REG_SR] = mips_rd_status() &
389 (MIPS_SR_PX | MIPS_SR_KX | MIPS_SR_UX | MIPS_SR_INT_MASK);
390
391 /*
392 * FREEBSD_DEVELOPERS_FIXME:
393 * Setup any other CPU-Specific registers (Not MIPS Standard)
394 * that are needed.
395 */
396
397 /* Setup to release spin count in in fork_exit(). */
398 td->td_md.md_spinlock_count = 1;
399 td->td_md.md_saved_intr = MIPS_SR_INT_IE;
400 #if 0
401 /* Maybe we need to fix this? */
402 td->td_md.md_saved_sr = ( (MIPS_SR_COP_2_BIT | MIPS_SR_COP_0_BIT) |
403 (MIPS_SR_PX | MIPS_SR_UX | MIPS_SR_KX | MIPS_SR_SX) |
404 (MIPS_SR_INT_IE | MIPS_HARD_INT_MASK));
405 #endif
406 td->td_md.md_tls = NULL;
407 }
408
409 /*
410 * Set that machine state for performing an upcall that starts
411 * the entry function with the given argument.
412 */
413 void
cpu_set_upcall(struct thread * td,void (* entry)(void *),void * arg,stack_t * stack)414 cpu_set_upcall(struct thread *td, void (*entry)(void *), void *arg,
415 stack_t *stack)
416 {
417 struct trapframe *tf;
418 register_t sp, sr;
419
420 sp = (((intptr_t)stack->ss_sp + stack->ss_size) & ~(STACK_ALIGN - 1)) -
421 CALLFRAME_SIZ;
422
423 /*
424 * Set the trap frame to point at the beginning of the uts
425 * function.
426 */
427 tf = td->td_frame;
428 sr = tf->sr;
429 bzero(tf, sizeof(struct trapframe));
430 tf->sp = sp;
431 tf->sr = sr;
432 tf->pc = (register_t)(intptr_t)entry;
433 /*
434 * MIPS ABI requires T9 to be the same as PC
435 * in subroutine entry point
436 */
437 tf->t9 = (register_t)(intptr_t)entry;
438 tf->a0 = (register_t)(intptr_t)arg;
439
440 /*
441 * FREEBSD_DEVELOPERS_FIXME:
442 * Setup any other CPU-Specific registers (Not MIPS Standard)
443 * that are needed.
444 */
445 }
446
447 bool
cpu_exec_vmspace_reuse(struct proc * p __unused,vm_map_t map __unused)448 cpu_exec_vmspace_reuse(struct proc *p __unused, vm_map_t map __unused)
449 {
450
451 return (true);
452 }
453
454 int
cpu_procctl(struct thread * td __unused,int idtype __unused,id_t id __unused,int com __unused,void * data __unused)455 cpu_procctl(struct thread *td __unused, int idtype __unused, id_t id __unused,
456 int com __unused, void *data __unused)
457 {
458
459 return (EINVAL);
460 }
461
462 /*
463 * Software interrupt handler for queued VM system processing.
464 */
465 void
swi_vm(void * dummy)466 swi_vm(void *dummy)
467 {
468
469 if (busdma_swi_pending)
470 busdma_swi();
471 }
472
473 int
cpu_set_user_tls(struct thread * td,void * tls_base)474 cpu_set_user_tls(struct thread *td, void *tls_base)
475 {
476
477 td->td_md.md_tls = (char*)tls_base;
478 if (td == curthread && cpuinfo.userlocal_reg == true) {
479 mips_wr_userlocal((unsigned long)tls_base +
480 td->td_proc->p_md.md_tls_tcb_offset);
481 }
482
483 return (0);
484 }
485
486 #ifdef DDB
487 #include <ddb/ddb.h>
488
489 #define DB_PRINT_REG(ptr, regname) \
490 db_printf(" %-12s %p\n", #regname, (void *)(intptr_t)((ptr)->regname))
491
492 #define DB_PRINT_REG_ARRAY(ptr, arrname, regname) \
493 db_printf(" %-12s %p\n", #regname, (void *)(intptr_t)((ptr)->arrname[regname]))
494
495 static void
dump_trapframe(struct trapframe * trapframe)496 dump_trapframe(struct trapframe *trapframe)
497 {
498
499 db_printf("Trapframe at %p\n", trapframe);
500
501 DB_PRINT_REG(trapframe, zero);
502 DB_PRINT_REG(trapframe, ast);
503 DB_PRINT_REG(trapframe, v0);
504 DB_PRINT_REG(trapframe, v1);
505 DB_PRINT_REG(trapframe, a0);
506 DB_PRINT_REG(trapframe, a1);
507 DB_PRINT_REG(trapframe, a2);
508 DB_PRINT_REG(trapframe, a3);
509 #if defined(__mips_n32) || defined(__mips_n64)
510 DB_PRINT_REG(trapframe, a4);
511 DB_PRINT_REG(trapframe, a5);
512 DB_PRINT_REG(trapframe, a6);
513 DB_PRINT_REG(trapframe, a7);
514 DB_PRINT_REG(trapframe, t0);
515 DB_PRINT_REG(trapframe, t1);
516 DB_PRINT_REG(trapframe, t2);
517 DB_PRINT_REG(trapframe, t3);
518 #else
519 DB_PRINT_REG(trapframe, t0);
520 DB_PRINT_REG(trapframe, t1);
521 DB_PRINT_REG(trapframe, t2);
522 DB_PRINT_REG(trapframe, t3);
523 DB_PRINT_REG(trapframe, t4);
524 DB_PRINT_REG(trapframe, t5);
525 DB_PRINT_REG(trapframe, t6);
526 DB_PRINT_REG(trapframe, t7);
527 #endif
528 DB_PRINT_REG(trapframe, s0);
529 DB_PRINT_REG(trapframe, s1);
530 DB_PRINT_REG(trapframe, s2);
531 DB_PRINT_REG(trapframe, s3);
532 DB_PRINT_REG(trapframe, s4);
533 DB_PRINT_REG(trapframe, s5);
534 DB_PRINT_REG(trapframe, s6);
535 DB_PRINT_REG(trapframe, s7);
536 DB_PRINT_REG(trapframe, t8);
537 DB_PRINT_REG(trapframe, t9);
538 DB_PRINT_REG(trapframe, k0);
539 DB_PRINT_REG(trapframe, k1);
540 DB_PRINT_REG(trapframe, gp);
541 DB_PRINT_REG(trapframe, sp);
542 DB_PRINT_REG(trapframe, s8);
543 DB_PRINT_REG(trapframe, ra);
544 DB_PRINT_REG(trapframe, sr);
545 DB_PRINT_REG(trapframe, mullo);
546 DB_PRINT_REG(trapframe, mulhi);
547 DB_PRINT_REG(trapframe, badvaddr);
548 DB_PRINT_REG(trapframe, cause);
549 DB_PRINT_REG(trapframe, pc);
550 }
551
DB_SHOW_COMMAND(pcb,ddb_dump_pcb)552 DB_SHOW_COMMAND(pcb, ddb_dump_pcb)
553 {
554 struct thread *td;
555 struct pcb *pcb;
556 struct trapframe *trapframe;
557
558 /* Determine which thread to examine. */
559 if (have_addr)
560 td = db_lookup_thread(addr, true);
561 else
562 td = curthread;
563
564 pcb = td->td_pcb;
565
566 db_printf("Thread %d at %p\n", td->td_tid, td);
567
568 db_printf("PCB at %p\n", pcb);
569
570 trapframe = &pcb->pcb_regs;
571 dump_trapframe(trapframe);
572
573 db_printf("PCB Context:\n");
574 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_S0);
575 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_S1);
576 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_S2);
577 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_S3);
578 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_S4);
579 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_S5);
580 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_S6);
581 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_S7);
582 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_SP);
583 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_S8);
584 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_RA);
585 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_SR);
586 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_GP);
587 DB_PRINT_REG_ARRAY(pcb, pcb_context, PCB_REG_PC);
588
589 db_printf("PCB onfault = %p\n", pcb->pcb_onfault);
590 db_printf("md_saved_intr = 0x%0lx\n", (long)td->td_md.md_saved_intr);
591 db_printf("md_spinlock_count = %d\n", td->td_md.md_spinlock_count);
592
593 if (td->td_frame != trapframe) {
594 db_printf("td->td_frame %p is not the same as pcb_regs %p\n",
595 td->td_frame, trapframe);
596 }
597 }
598
599 /*
600 * Dump the trapframe beginning at address specified by first argument.
601 */
DB_SHOW_COMMAND(trapframe,ddb_dump_trapframe)602 DB_SHOW_COMMAND(trapframe, ddb_dump_trapframe)
603 {
604
605 if (!have_addr)
606 return;
607
608 dump_trapframe((struct trapframe *)addr);
609 }
610
611 #endif /* DDB */
612