1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24*0Sstevel@tonic-gate * Use is subject to license terms.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
28*0Sstevel@tonic-gate
29*0Sstevel@tonic-gate /*
30*0Sstevel@tonic-gate * Intel-specific portions of the debugger fault routines
31*0Sstevel@tonic-gate */
32*0Sstevel@tonic-gate
33*0Sstevel@tonic-gate #include <sys/types.h>
34*0Sstevel@tonic-gate #include <sys/stack.h>
35*0Sstevel@tonic-gate #include <sys/frame.h>
36*0Sstevel@tonic-gate
37*0Sstevel@tonic-gate #include <kmdb/kmdb_fault.h>
38*0Sstevel@tonic-gate #include <kmdb/kmdb_asmutil.h>
39*0Sstevel@tonic-gate #include <mdb/mdb_kreg.h>
40*0Sstevel@tonic-gate #include <mdb/mdb.h>
41*0Sstevel@tonic-gate
42*0Sstevel@tonic-gate #define MAX_STACK_FRAMES 30
43*0Sstevel@tonic-gate
44*0Sstevel@tonic-gate static void
print_frame(uintptr_t pc,int fnum,int safe)45*0Sstevel@tonic-gate print_frame(uintptr_t pc, int fnum, int safe)
46*0Sstevel@tonic-gate {
47*0Sstevel@tonic-gate if (safe) {
48*0Sstevel@tonic-gate /*
49*0Sstevel@tonic-gate * We exploded the first time around, so we want to try again,
50*0Sstevel@tonic-gate * this time without symbol names
51*0Sstevel@tonic-gate */
52*0Sstevel@tonic-gate mdb_iob_printf(mdb.m_err, " [%2d] %?p()\n", fnum, pc);
53*0Sstevel@tonic-gate } else {
54*0Sstevel@tonic-gate mdb_iob_printf(mdb.m_err, " [%2d] %?p %A()\n", fnum, pc, pc);
55*0Sstevel@tonic-gate }
56*0Sstevel@tonic-gate }
57*0Sstevel@tonic-gate
58*0Sstevel@tonic-gate static int
valid_frame(struct frame * fr)59*0Sstevel@tonic-gate valid_frame(struct frame *fr)
60*0Sstevel@tonic-gate {
61*0Sstevel@tonic-gate uintptr_t addr = (uintptr_t)fr;
62*0Sstevel@tonic-gate
63*0Sstevel@tonic-gate if (addr & (STACK_ALIGN - 1)) {
64*0Sstevel@tonic-gate mdb_iob_printf(mdb.m_err, " mis-aligned frame (%p)\n", fr);
65*0Sstevel@tonic-gate return (0);
66*0Sstevel@tonic-gate }
67*0Sstevel@tonic-gate
68*0Sstevel@tonic-gate return (1);
69*0Sstevel@tonic-gate }
70*0Sstevel@tonic-gate
71*0Sstevel@tonic-gate static void
print_stack(kreg_t sp,int safe)72*0Sstevel@tonic-gate print_stack(kreg_t sp, int safe)
73*0Sstevel@tonic-gate {
74*0Sstevel@tonic-gate struct frame *fr = (struct frame *)sp;
75*0Sstevel@tonic-gate int frnum = 1;
76*0Sstevel@tonic-gate
77*0Sstevel@tonic-gate while (fr != NULL && valid_frame(fr) && fr->fr_savpc != 0 &&
78*0Sstevel@tonic-gate frnum < MAX_STACK_FRAMES) {
79*0Sstevel@tonic-gate print_frame(fr->fr_savpc, frnum, safe);
80*0Sstevel@tonic-gate
81*0Sstevel@tonic-gate fr = (struct frame *)fr->fr_savfp;
82*0Sstevel@tonic-gate frnum++;
83*0Sstevel@tonic-gate }
84*0Sstevel@tonic-gate }
85*0Sstevel@tonic-gate
86*0Sstevel@tonic-gate void
kmdb_print_stack(void)87*0Sstevel@tonic-gate kmdb_print_stack(void)
88*0Sstevel@tonic-gate {
89*0Sstevel@tonic-gate print_stack(get_fp(), FALSE); /* show sym names */
90*0Sstevel@tonic-gate }
91*0Sstevel@tonic-gate
92*0Sstevel@tonic-gate void
kmdb_fault_display(kreg_t trapno,kreg_t pc,kreg_t sp,int safe)93*0Sstevel@tonic-gate kmdb_fault_display(kreg_t trapno, kreg_t pc, kreg_t sp, int safe)
94*0Sstevel@tonic-gate {
95*0Sstevel@tonic-gate mdb_iob_printf(mdb.m_err, " trapno: %d, sp: %p, pc: %p", trapno,
96*0Sstevel@tonic-gate sp, pc);
97*0Sstevel@tonic-gate if (!safe)
98*0Sstevel@tonic-gate mdb_iob_printf(mdb.m_err, " %A", pc);
99*0Sstevel@tonic-gate mdb_iob_printf(mdb.m_err, "\n\n");
100*0Sstevel@tonic-gate
101*0Sstevel@tonic-gate if (mdb.m_dseg == NULL || mdb.m_dsegsz == 0) {
102*0Sstevel@tonic-gate mdb_iob_printf(mdb.m_err,
103*0Sstevel@tonic-gate "\t*** Stack trace omitted because debugger segment size\n"
104*0Sstevel@tonic-gate "\t*** and/or length not set.\n");
105*0Sstevel@tonic-gate return;
106*0Sstevel@tonic-gate }
107*0Sstevel@tonic-gate
108*0Sstevel@tonic-gate if (!(sp - (uintptr_t)mdb.m_dseg < mdb.m_dsegsz)) {
109*0Sstevel@tonic-gate mdb_iob_printf(mdb.m_err,
110*0Sstevel@tonic-gate "\t*** Stack trace omitted because sp (%p) isn't in the\n"
111*0Sstevel@tonic-gate "\t*** debugger segment.\n", sp);
112*0Sstevel@tonic-gate return;
113*0Sstevel@tonic-gate }
114*0Sstevel@tonic-gate
115*0Sstevel@tonic-gate /*
116*0Sstevel@tonic-gate * We were on a kmdb stack when we took this fault. We're going to
117*0Sstevel@tonic-gate * assume that there's nothing weird on the stack, and that, therefore,
118*0Sstevel@tonic-gate * we can use a simple algorithm to dump it.
119*0Sstevel@tonic-gate */
120*0Sstevel@tonic-gate
121*0Sstevel@tonic-gate print_stack(sp, safe);
122*0Sstevel@tonic-gate }
123