kernel - ddb: Print raw instruction pointers in ddb backtrace.
[dragonfly.git] / sys / platform / pc64 / x86_64 / db_trace.c
CommitLineData
d7f50089 1/*
c8fe38ae
MD
2 * Copyright (c) 2008 The DragonFly Project. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 * 3. Neither the name of The DragonFly Project nor the names of its
15 * contributors may be used to endorse or promote products derived
16 * from this software without specific, prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
21 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
22 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
26 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
28 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * --
32 *
d7f50089
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33 * Mach Operating System
34 * Copyright (c) 1991,1990 Carnegie Mellon University
35 * All Rights Reserved.
36 *
37 * Permission to use, copy, modify and distribute this software and its
38 * documentation is hereby granted, provided that both the copyright
39 * notice and this permission notice appear in all copies of the
40 * software, derivative works or modified versions, and any portions
41 * thereof, and that both notices appear in supporting documentation.
42 *
43 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
44 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
45 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
46 *
47 * Carnegie Mellon requests users of this software to return to
48 *
49 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
50 * School of Computer Science
51 * Carnegie Mellon University
52 * Pittsburgh PA 15213-3890
53 *
54 * any improvements or extensions that they make and grant Carnegie the
55 * rights to redistribute these changes.
56 *
57 * $FreeBSD: src/sys/i386/i386/db_trace.c,v 1.35.2.3 2002/02/21 22:31:25 silby Exp $
d7f50089
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58 */
59
60#include <sys/param.h>
61#include <sys/systm.h>
62#include <sys/linker_set.h>
63#include <sys/lock.h>
64#include <sys/proc.h>
65#include <sys/reg.h>
66
67#include <machine/cpu.h>
68#include <machine/md_var.h>
69
70#include <vm/vm.h>
71#include <vm/vm_param.h>
72#include <vm/pmap.h>
73#include <vm/vm_map.h>
74#include <ddb/ddb.h>
75#include <dlfcn.h> /* DLL */
76
77#include <sys/user.h>
78
79#include <ddb/db_access.h>
80#include <ddb/db_sym.h>
81#include <ddb/db_variables.h>
82
83db_varfcn_t db_dr0;
84db_varfcn_t db_dr1;
85db_varfcn_t db_dr2;
86db_varfcn_t db_dr3;
87db_varfcn_t db_dr4;
88db_varfcn_t db_dr5;
89db_varfcn_t db_dr6;
90db_varfcn_t db_dr7;
91
92/*
93 * Machine register set.
94 */
95struct db_variable db_regs[] = {
60233e58
SW
96 { "cs", &ddb_regs.tf_cs, NULL },
97/* { "ds", &ddb_regs.tf_ds, NULL },
98 { "es", &ddb_regs.tf_es, NULL },
99 { "fs", &ddb_regs.tf_fs, NULL },
100 { "gs", &ddb_regs.tf_gs, NULL }, */
101 { "ss", &ddb_regs.tf_ss, NULL },
102 { "rax", &ddb_regs.tf_rax, NULL },
103 { "rcx", &ddb_regs.tf_rcx, NULL },
104 { "rdx", &ddb_regs.tf_rdx, NULL },
105 { "rbx", &ddb_regs.tf_rbx, NULL },
106 { "rsp", &ddb_regs.tf_rsp, NULL },
107 { "rbp", &ddb_regs.tf_rbp, NULL },
108 { "rsi", &ddb_regs.tf_rsi, NULL },
109 { "rdi", &ddb_regs.tf_rdi, NULL },
110 { "rip", &ddb_regs.tf_rip, NULL },
111 { "rfl", &ddb_regs.tf_rflags, NULL },
112 { "r8", &ddb_regs.tf_r8, NULL },
113 { "r9", &ddb_regs.tf_r9, NULL },
114 { "r10", &ddb_regs.tf_r10, NULL },
115 { "r11", &ddb_regs.tf_r11, NULL },
116 { "r12", &ddb_regs.tf_r12, NULL },
117 { "r13", &ddb_regs.tf_r13, NULL },
118 { "r14", &ddb_regs.tf_r14, NULL },
119 { "r15", &ddb_regs.tf_r15, NULL },
d7f50089
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120 { "dr0", NULL, db_dr0 },
121 { "dr1", NULL, db_dr1 },
122 { "dr2", NULL, db_dr2 },
123 { "dr3", NULL, db_dr3 },
124 { "dr4", NULL, db_dr4 },
125 { "dr5", NULL, db_dr5 },
126 { "dr6", NULL, db_dr6 },
127 { "dr7", NULL, db_dr7 },
128};
c157ff7a 129struct db_variable *db_eregs = db_regs + NELEM(db_regs);
d7f50089
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130
131/*
132 * Stack trace.
133 */
134#define INKERNEL(va) (((vm_offset_t)(va)) >= USRSTACK)
135
b2b3ffcd
SS
136struct x86_64_frame {
137 struct x86_64_frame *f_frame;
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YY
138 long f_retaddr;
139 long f_arg0;
140};
141
142#define NORMAL 0
143#define TRAP 1
144#define INTERRUPT 2
145#define SYSCALL 3
146
b2b3ffcd
SS
147static void db_nextframe(struct x86_64_frame **, db_addr_t *);
148static int db_numargs(struct x86_64_frame *);
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MD
149static void db_print_stack_entry(const char *, int, char **, long *, db_addr_t);
150static void dl_symbol_values(long callpc, const char **name);
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151
152
153static char *watchtype_str(int type);
b2b3ffcd 154static int kx86_64_set_watch(int watchnum, unsigned int watchaddr,
d7f50089 155 int size, int access, struct dbreg * d);
b2b3ffcd 156static int kx86_64_clr_watch(int watchnum, struct dbreg * d);
d7f50089
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157int db_md_set_watchpoint(db_expr_t addr, db_expr_t size);
158int db_md_clr_watchpoint(db_expr_t addr, db_expr_t size);
159void db_md_list_watchpoints(void);
160
161
162/*
163 * Figure out how many arguments were passed into the frame at "fp".
164 */
165static int
b2b3ffcd 166db_numargs(struct x86_64_frame *fp)
d7f50089 167{
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MD
168#if 1
169 return (0); /* regparm, needs dwarf2 info */
170#else
d7f50089
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171 int args;
172#if 0
173 int *argp;
174 int inst;
175
176 argp = (int *)db_get_value((int)&fp->f_retaddr, 4, FALSE);
177 /*
178 * XXX etext is wrong for LKMs. We should attempt to interpret
179 * the instruction at the return address in all cases. This
180 * may require better fault handling.
181 */
182 if (argp < (int *)btext || argp >= (int *)etext) {
183 args = 5;
184 } else {
185 inst = db_get_value((int)argp, 4, FALSE);
186 if ((inst & 0xff) == 0x59) /* popl %ecx */
187 args = 1;
188 else if ((inst & 0xffff) == 0xc483) /* addl $Ibs, %esp */
189 args = ((inst >> 16) & 0xff) / 4;
190 else
191 args = 5;
192 }
193#endif
194 args = 5;
195 return(args);
c8fe38ae 196#endif
d7f50089
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197}
198
199static void
c8fe38ae 200db_print_stack_entry(const char *name, int narg, char **argnp, long *argp,
d7f50089
YY
201 db_addr_t callpc)
202{
203 db_printf("%s(", name);
204 while (narg) {
205 if (argnp)
206 db_printf("%s=", *argnp++);
973c11b9 207 db_printf("%ld", (long)db_get_value((long)argp, 8, FALSE));
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208 argp++;
209 if (--narg != 0)
210 db_printf(",");
c8fe38ae 211 }
d7f50089 212 db_printf(") at ");
ebd07f54
VS
213 db_printsym(callpc, DB_STGY_PROC);
214 db_printf(" %p ", (void*) callpc);
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215 db_printf("\n");
216}
217
218/*
219 * Figure out the next frame up in the call stack.
220 */
221static void
b2b3ffcd 222db_nextframe(struct x86_64_frame **fp, db_addr_t *ip)
d7f50089
YY
223{
224 struct trapframe *tf;
225 int frame_type;
c8fe38ae 226 long rip, rsp, rbp;
d7f50089
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227 db_expr_t offset;
228 const char *sym, *name;
229
79dca14e
MD
230 if ((unsigned long)*fp < PAGE_SIZE) {
231 *fp = NULL;
232 return;
233 }
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MD
234 rip = db_get_value((long) &(*fp)->f_retaddr, 8, FALSE);
235 rbp = db_get_value((long) &(*fp)->f_frame, 8, FALSE);
d7f50089
YY
236
237 /*
238 * Figure out frame type.
239 */
240
241 frame_type = NORMAL;
242
c8fe38ae 243 sym = db_search_symbol(rip, DB_STGY_ANY, &offset);
d7f50089 244 db_symbol_values(sym, &name, NULL);
c8fe38ae 245 dl_symbol_values(rip, &name);
d7f50089
YY
246 if (name != NULL) {
247 if (!strcmp(name, "calltrap")) {
248 frame_type = TRAP;
249 } else if (!strncmp(name, "Xresume", 7)) {
250 frame_type = INTERRUPT;
251 } else if (!strcmp(name, "_Xsyscall")) {
252 frame_type = SYSCALL;
253 }
254 }
255
256 /*
257 * Normal frames need no special processing.
258 */
259 if (frame_type == NORMAL) {
c8fe38ae 260 *ip = (db_addr_t) rip;
b2b3ffcd 261 *fp = (struct x86_64_frame *) rbp;
d7f50089
YY
262 return;
263 }
264
c8fe38ae 265 db_print_stack_entry(name, 0, 0, 0, rip);
d7f50089
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266
267 /*
268 * Point to base of trapframe which is just above the
269 * current frame.
270 */
c8fe38ae 271 tf = (struct trapframe *)((long)*fp + 16);
d7f50089
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272
273#if 0
c8fe38ae 274 rsp = (ISPL(tf->tf_cs) == SEL_UPL) ? tf->tf_rsp : (long)&tf->tf_rsp;
d7f50089 275#endif
c8fe38ae 276 rsp = (long)&tf->tf_rsp;
d7f50089
YY
277
278 switch (frame_type) {
279 case TRAP:
280 {
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MD
281 rip = tf->tf_rip;
282 rbp = tf->tf_rbp;
d7f50089 283 db_printf(
973c11b9 284 "--- trap %016lx, rip = %016lx, rsp = %016lx, rbp = %016lx ---\n",
c8fe38ae 285 tf->tf_trapno, rip, rsp, rbp);
d7f50089
YY
286 }
287 break;
288 case SYSCALL:
289 {
c8fe38ae
MD
290 rip = tf->tf_rip;
291 rbp = tf->tf_rbp;
d7f50089 292 db_printf(
973c11b9 293 "--- syscall %016lx, rip = %016lx, rsp = %016lx, rbp = %016lx ---\n",
c8fe38ae 294 tf->tf_rax, rip, rsp, rbp);
d7f50089
YY
295 }
296 break;
297 case INTERRUPT:
c8fe38ae 298 tf = (struct trapframe *)((long)*fp + 16);
d7f50089 299 {
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MD
300 rip = tf->tf_rip;
301 rbp = tf->tf_rbp;
d7f50089 302 db_printf(
973c11b9 303 "--- interrupt, rip = %016lx, rsp = %016lx, rbp = %016lx ---\n",
c8fe38ae 304 rip, rsp, rbp);
d7f50089
YY
305 }
306 break;
307 default:
308 break;
309 }
310
c8fe38ae 311 *ip = (db_addr_t) rip;
b2b3ffcd 312 *fp = (struct x86_64_frame *) rbp;
d7f50089
YY
313}
314
315void
316db_stack_trace_cmd(db_expr_t addr, boolean_t have_addr, db_expr_t count,
317 char *modif)
318{
b2b3ffcd 319 struct x86_64_frame *frame;
973c11b9 320 long *argp;
d7f50089
YY
321 db_addr_t callpc;
322 boolean_t first;
323 int i;
324
325 if (count == -1)
326 count = 1024;
327
328 if (!have_addr) {
b2b3ffcd 329 frame = (struct x86_64_frame *)BP_REGS(&ddb_regs);
d7f50089 330 if (frame == NULL)
b2b3ffcd 331 frame = (struct x86_64_frame *)(SP_REGS(&ddb_regs) - 8);
d7f50089
YY
332 callpc = PC_REGS(&ddb_regs);
333 } else {
334 /*
335 * Look for something that might be a frame pointer, just as
336 * a convenience.
337 */
b2b3ffcd 338 frame = (struct x86_64_frame *)addr;
c8fe38ae 339 for (i = 0; i < 4096; i += 8) {
b2b3ffcd 340 struct x86_64_frame *check;
d7f50089 341
b2b3ffcd 342 check = (struct x86_64_frame *)db_get_value((long)((char *)&frame->f_frame + i), 8, FALSE);
d7f50089
YY
343 if ((char *)check - (char *)frame >= 0 &&
344 (char *)check - (char *)frame < 4096
345 ) {
346 break;
347 }
348 db_printf("%p does not look like a stack frame, skipping\n", (char *)&frame->f_frame + i);
349 }
350 if (i == 4096) {
351 db_printf("Unable to find anything that looks like a stack frame\n");
352 return;
353 }
354 frame = (void *)((char *)frame + i);
355 db_printf("Trace beginning at frame %p\n", frame);
c8fe38ae 356 callpc = (db_addr_t)db_get_value((long)&frame->f_retaddr, 8, FALSE);
d7f50089
YY
357 }
358
359 first = TRUE;
360 while (count--) {
b2b3ffcd 361 struct x86_64_frame *actframe;
d7f50089
YY
362 int narg;
363 const char * name;
364 db_expr_t offset;
365 c_db_sym_t sym;
366#define MAXNARG 16
367 char *argnames[MAXNARG], **argnp = NULL;
368
369 sym = db_search_symbol(callpc, DB_STGY_ANY, &offset);
370 db_symbol_values(sym, &name, NULL);
371 dl_symbol_values(callpc, &name);
372
373 /*
374 * Attempt to determine a (possibly fake) frame that gives
375 * the caller's pc. It may differ from `frame' if the
376 * current function never sets up a standard frame or hasn't
377 * set one up yet or has just discarded one. The last two
378 * cases can be guessed fairly reliably for code generated
379 * by gcc. The first case is too much trouble to handle in
380 * general because the amount of junk on the stack depends
381 * on the pc (the special handling of "calltrap", etc. in
382 * db_nextframe() works because the `next' pc is special).
383 */
384 actframe = frame;
385 if (first) {
386 if (!have_addr) {
387 int instr;
388
389 instr = db_get_value(callpc, 4, FALSE);
c8fe38ae
MD
390 if ((instr & 0xffffffff) == 0xe5894855) {
391 /* pushq %rbp; movq %rsp, %rbp */
b2b3ffcd 392 actframe = (struct x86_64_frame *)
c8fe38ae
MD
393 (SP_REGS(&ddb_regs) - 8);
394 } else if ((instr & 0xffffff) == 0xe58948) {
395 /* movq %rsp, %rbp */
b2b3ffcd 396 actframe = (struct x86_64_frame *)
d7f50089
YY
397 SP_REGS(&ddb_regs);
398 if (ddb_regs.tf_rbp == 0) {
399 /* Fake caller's frame better. */
400 frame = actframe;
401 }
c8fe38ae 402 } else if ((instr & 0xff) == 0xc3) {
d7f50089 403 /* ret */
b2b3ffcd 404 actframe = (struct x86_64_frame *)
c8fe38ae 405 (SP_REGS(&ddb_regs) - 8);
d7f50089
YY
406 } else if (offset == 0) {
407 /* Probably a symbol in assembler code. */
b2b3ffcd 408 actframe = (struct x86_64_frame *)
c8fe38ae 409 (SP_REGS(&ddb_regs) - 8);
d7f50089
YY
410 }
411 } else if (name != NULL &&
412 strcmp(name, "fork_trampoline") == 0) {
413 /*
414 * Don't try to walk back on a stack for a
415 * process that hasn't actually been run yet.
416 */
417 db_print_stack_entry(name, 0, 0, 0, callpc);
418 break;
419 }
420 first = FALSE;
421 }
422
423 argp = &actframe->f_arg0;
424 narg = MAXNARG;
425 if (sym != NULL && db_sym_numargs(sym, &narg, argnames)) {
426 argnp = argnames;
427 } else {
428 narg = db_numargs(frame);
429 }
430
431 db_print_stack_entry(name, narg, argnp, argp, callpc);
432
433 if (actframe != frame) {
434 /* `frame' belongs to caller. */
435 callpc = (db_addr_t)
c8fe38ae 436 db_get_value((long)&actframe->f_retaddr, 8, FALSE);
d7f50089
YY
437 continue;
438 }
439
440 db_nextframe(&frame, &callpc);
441 if (frame == 0)
442 break;
443 }
444}
445
446void
7ce2998e 447print_backtrace(int count)
d7f50089 448{
c8fe38ae 449 register_t rbp;
d7f50089 450
c8fe38ae 451 __asm __volatile("movq %%rbp, %0" : "=r" (rbp));
7ce2998e 452 db_stack_trace_cmd(rbp, 1, count, NULL);
d7f50089
YY
453}
454
455#define DB_DRX_FUNC(reg) \
456int \
457db_ ## reg (struct db_variable *vp, db_expr_t *valuep, int op) \
458{ \
459 if (op == DB_VAR_GET) \
460 *valuep = r ## reg (); \
461 else \
462 load_ ## reg (*valuep); \
463 \
464 return(0); \
465}
466
467DB_DRX_FUNC(dr0)
468DB_DRX_FUNC(dr1)
469DB_DRX_FUNC(dr2)
470DB_DRX_FUNC(dr3)
471DB_DRX_FUNC(dr4)
472DB_DRX_FUNC(dr5)
473DB_DRX_FUNC(dr6)
474DB_DRX_FUNC(dr7)
475
476static int
b2b3ffcd 477kx86_64_set_watch(int watchnum, unsigned int watchaddr, int size, int access,
d7f50089
YY
478 struct dbreg *d)
479{
480 int i;
481 unsigned int mask;
482
483 if (watchnum == -1) {
484 for (i = 0, mask = 0x3; i < 4; i++, mask <<= 2)
485 if ((d->dr[7] & mask) == 0)
486 break;
487 if (i < 4)
488 watchnum = i;
489 else
490 return(-1);
491 }
c8fe38ae 492
d7f50089
YY
493 switch (access) {
494 case DBREG_DR7_EXEC:
495 size = 1; /* size must be 1 for an execution breakpoint */
496 /* fall through */
497 case DBREG_DR7_WRONLY:
498 case DBREG_DR7_RDWR:
499 break;
500 default:
501 return(-1);
502 }
503
504 /*
c8fe38ae 505 * we can watch a 1, 2, 4, or 8 byte sized location
d7f50089
YY
506 */
507 switch (size) {
508 case 1:
509 mask = 0x00;
510 break;
511 case 2:
512 mask = 0x01 << 2;
513 break;
514 case 4:
515 mask = 0x03 << 2;
1a70d68a 516 break;
c8fe38ae
MD
517 case 8:
518 mask = 0x02 << 2;
d7f50089
YY
519 break;
520 default:
521 return(-1);
522 }
523
524 mask |= access;
525
526 /* clear the bits we are about to affect */
527 d->dr[7] &= ~((0x3 << (watchnum * 2)) | (0x0f << (watchnum * 4 + 16)));
528
529 /* set drN register to the address, N=watchnum */
530 DBREG_DRX(d, watchnum) = watchaddr;
531
532 /* enable the watchpoint */
533 d->dr[7] |= (0x2 << (watchnum * 2)) | (mask << (watchnum * 4 + 16));
534
535 return(watchnum);
536}
537
538
539int
b2b3ffcd 540kx86_64_clr_watch(int watchnum, struct dbreg *d)
d7f50089
YY
541{
542 if (watchnum < 0 || watchnum >= 4)
543 return(-1);
c8fe38ae 544
d7f50089
YY
545 d->dr[7] &= ~((0x3 << (watchnum * 2)) | (0x0f << (watchnum * 4 + 16)));
546 DBREG_DRX(d, watchnum) = 0;
c8fe38ae 547
d7f50089
YY
548 return(0);
549}
550
551
552int
553db_md_set_watchpoint(db_expr_t addr, db_expr_t size)
554{
555 int avail, wsize;
556 int i;
557 struct dbreg d;
558
559 fill_dbregs(NULL, &d);
c8fe38ae 560
d7f50089 561 avail = 0;
c8fe38ae 562 for (i = 0; i < 4; i++) {
d7f50089
YY
563 if ((d.dr[7] & (3 << (i * 2))) == 0)
564 avail++;
565 }
c8fe38ae
MD
566
567 if (avail * 8 < size)
d7f50089 568 return(-1);
c8fe38ae 569
d7f50089
YY
570 for (i=0; i < 4 && (size != 0); i++) {
571 if ((d.dr[7] & (3 << (i * 2))) == 0) {
c8fe38ae
MD
572 if (size >= 8 || (avail == 1 && size > 4))
573 wsize = 8;
574 else if (size > 2)
d7f50089
YY
575 wsize = 4;
576 else
577 wsize = size;
578 if (wsize == 3)
579 wsize++;
b2b3ffcd 580 kx86_64_set_watch(i, addr, wsize, DBREG_DR7_WRONLY, &d);
d7f50089
YY
581 addr += wsize;
582 size -= wsize;
583 }
584 }
585
586 set_dbregs(NULL, &d);
587
588 return(0);
589}
590
591int
592db_md_clr_watchpoint(db_expr_t addr, db_expr_t size)
593{
d7f50089 594 struct dbreg d;
c8fe38ae 595 int i;
d7f50089
YY
596
597 fill_dbregs(NULL, &d);
598
c8fe38ae 599 for(i = 0; i < 4; i++) {
d7f50089
YY
600 if (d.dr[7] & (3 << (i * 2))) {
601 if ((DBREG_DRX((&d), i) >= addr) &&
602 (DBREG_DRX((&d), i) < addr + size))
b2b3ffcd 603 kx86_64_clr_watch(i, &d);
d7f50089
YY
604 }
605 }
606
607 set_dbregs(NULL, &d);
608
609 return(0);
610}
611
612static char *
613watchtype_str(int type)
614{
615 switch (type) {
616 case DBREG_DR7_EXEC:
617 return "execute";
618 case DBREG_DR7_RDWR:
619 return "read/write";
620 case DBREG_DR7_WRONLY:
621 return "write";
622 default:
623 return "invalid";
624 }
625}
626
627void
628db_md_list_watchpoints(void)
629{
630 int i;
631 struct dbreg d;
632
633 fill_dbregs(NULL, &d);
634
635 db_printf("\nhardware watchpoints:\n");
636 db_printf(" watch status type len address\n"
637 " ----- -------- ---------- --- ----------\n");
c8fe38ae 638 for (i = 0; i < 4; i++) {
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639 if (d.dr[7] & (0x03 << (i * 2))) {
640 unsigned type, len;
641 type = (d.dr[7] >> (16 + (i * 4))) & 3;
642 len = (d.dr[7] >> (16 + (i * 4) + 2)) & 3;
973c11b9 643 db_printf(" %-5d %-8s %10s %3d 0x%08lx\n",
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644 i, "enabled", watchtype_str(type),
645 len + 1, DBREG_DRX((&d), i));
646 } else {
647 db_printf(" %-5d disabled\n", i);
648 }
649 }
650
651 db_printf("\ndebug register values:\n");
c8fe38ae 652 for (i = 0; i < 8; i++)
973c11b9 653 db_printf(" dr%d 0x%08lx\n", i, DBREG_DRX((&d),i));
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654 db_printf("\n");
655}
656
657/*
658 * See if dladdr() can get the symbol name via the standard dynamic loader.
659 */
660static
661void
c8fe38ae 662dl_symbol_values(long callpc, const char **name)
d7f50089 663{
bfc09ba0 664#if 0
d7f50089 665 Dl_info info;
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666 if (*name == NULL) {
667 if (dladdr((const void *)callpc, &info) != 0) {
668 if (info.dli_saddr <= (const void *)callpc)
669 *name = info.dli_sname;
670 }
671 }
bfc09ba0 672#endif
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673}
674