1*7c478bd9Sstevel@tonic-gate /* 2*7c478bd9Sstevel@tonic-gate * CDDL HEADER START 3*7c478bd9Sstevel@tonic-gate * 4*7c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*7c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*7c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*7c478bd9Sstevel@tonic-gate * with the License. 8*7c478bd9Sstevel@tonic-gate * 9*7c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*7c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*7c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 12*7c478bd9Sstevel@tonic-gate * and limitations under the License. 13*7c478bd9Sstevel@tonic-gate * 14*7c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*7c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*7c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*7c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*7c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*7c478bd9Sstevel@tonic-gate * 20*7c478bd9Sstevel@tonic-gate * CDDL HEADER END 21*7c478bd9Sstevel@tonic-gate */ 22*7c478bd9Sstevel@tonic-gate /* 23*7c478bd9Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24*7c478bd9Sstevel@tonic-gate * Use is subject to license terms. 25*7c478bd9Sstevel@tonic-gate */ 26*7c478bd9Sstevel@tonic-gate 27*7c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 28*7c478bd9Sstevel@tonic-gate 29*7c478bd9Sstevel@tonic-gate /* 30*7c478bd9Sstevel@tonic-gate * Intel-specific portions of the debugger fault routines 31*7c478bd9Sstevel@tonic-gate */ 32*7c478bd9Sstevel@tonic-gate 33*7c478bd9Sstevel@tonic-gate #include <sys/types.h> 34*7c478bd9Sstevel@tonic-gate #include <sys/stack.h> 35*7c478bd9Sstevel@tonic-gate #include <sys/frame.h> 36*7c478bd9Sstevel@tonic-gate 37*7c478bd9Sstevel@tonic-gate #include <kmdb/kmdb_fault.h> 38*7c478bd9Sstevel@tonic-gate #include <kmdb/kmdb_asmutil.h> 39*7c478bd9Sstevel@tonic-gate #include <mdb/mdb_kreg.h> 40*7c478bd9Sstevel@tonic-gate #include <mdb/mdb.h> 41*7c478bd9Sstevel@tonic-gate 42*7c478bd9Sstevel@tonic-gate #define MAX_STACK_FRAMES 30 43*7c478bd9Sstevel@tonic-gate 44*7c478bd9Sstevel@tonic-gate static void 45*7c478bd9Sstevel@tonic-gate print_frame(uintptr_t pc, int fnum, int safe) 46*7c478bd9Sstevel@tonic-gate { 47*7c478bd9Sstevel@tonic-gate if (safe) { 48*7c478bd9Sstevel@tonic-gate /* 49*7c478bd9Sstevel@tonic-gate * We exploded the first time around, so we want to try again, 50*7c478bd9Sstevel@tonic-gate * this time without symbol names 51*7c478bd9Sstevel@tonic-gate */ 52*7c478bd9Sstevel@tonic-gate mdb_iob_printf(mdb.m_err, " [%2d] %?p()\n", fnum, pc); 53*7c478bd9Sstevel@tonic-gate } else { 54*7c478bd9Sstevel@tonic-gate mdb_iob_printf(mdb.m_err, " [%2d] %?p %A()\n", fnum, pc, pc); 55*7c478bd9Sstevel@tonic-gate } 56*7c478bd9Sstevel@tonic-gate } 57*7c478bd9Sstevel@tonic-gate 58*7c478bd9Sstevel@tonic-gate static int 59*7c478bd9Sstevel@tonic-gate valid_frame(struct frame *fr) 60*7c478bd9Sstevel@tonic-gate { 61*7c478bd9Sstevel@tonic-gate uintptr_t addr = (uintptr_t)fr; 62*7c478bd9Sstevel@tonic-gate 63*7c478bd9Sstevel@tonic-gate if (addr & (STACK_ALIGN - 1)) { 64*7c478bd9Sstevel@tonic-gate mdb_iob_printf(mdb.m_err, " mis-aligned frame (%p)\n", fr); 65*7c478bd9Sstevel@tonic-gate return (0); 66*7c478bd9Sstevel@tonic-gate } 67*7c478bd9Sstevel@tonic-gate 68*7c478bd9Sstevel@tonic-gate return (1); 69*7c478bd9Sstevel@tonic-gate } 70*7c478bd9Sstevel@tonic-gate 71*7c478bd9Sstevel@tonic-gate static void 72*7c478bd9Sstevel@tonic-gate print_stack(kreg_t sp, int safe) 73*7c478bd9Sstevel@tonic-gate { 74*7c478bd9Sstevel@tonic-gate struct frame *fr = (struct frame *)sp; 75*7c478bd9Sstevel@tonic-gate int frnum = 1; 76*7c478bd9Sstevel@tonic-gate 77*7c478bd9Sstevel@tonic-gate while (fr != NULL && valid_frame(fr) && fr->fr_savpc != 0 && 78*7c478bd9Sstevel@tonic-gate frnum < MAX_STACK_FRAMES) { 79*7c478bd9Sstevel@tonic-gate print_frame(fr->fr_savpc, frnum, safe); 80*7c478bd9Sstevel@tonic-gate 81*7c478bd9Sstevel@tonic-gate fr = (struct frame *)fr->fr_savfp; 82*7c478bd9Sstevel@tonic-gate frnum++; 83*7c478bd9Sstevel@tonic-gate } 84*7c478bd9Sstevel@tonic-gate } 85*7c478bd9Sstevel@tonic-gate 86*7c478bd9Sstevel@tonic-gate void 87*7c478bd9Sstevel@tonic-gate kmdb_print_stack(void) 88*7c478bd9Sstevel@tonic-gate { 89*7c478bd9Sstevel@tonic-gate print_stack(get_fp(), FALSE); /* show sym names */ 90*7c478bd9Sstevel@tonic-gate } 91*7c478bd9Sstevel@tonic-gate 92*7c478bd9Sstevel@tonic-gate void 93*7c478bd9Sstevel@tonic-gate kmdb_fault_display(kreg_t trapno, kreg_t pc, kreg_t sp, int safe) 94*7c478bd9Sstevel@tonic-gate { 95*7c478bd9Sstevel@tonic-gate mdb_iob_printf(mdb.m_err, " trapno: %d, sp: %p, pc: %p", trapno, 96*7c478bd9Sstevel@tonic-gate sp, pc); 97*7c478bd9Sstevel@tonic-gate if (!safe) 98*7c478bd9Sstevel@tonic-gate mdb_iob_printf(mdb.m_err, " %A", pc); 99*7c478bd9Sstevel@tonic-gate mdb_iob_printf(mdb.m_err, "\n\n"); 100*7c478bd9Sstevel@tonic-gate 101*7c478bd9Sstevel@tonic-gate if (mdb.m_dseg == NULL || mdb.m_dsegsz == 0) { 102*7c478bd9Sstevel@tonic-gate mdb_iob_printf(mdb.m_err, 103*7c478bd9Sstevel@tonic-gate "\t*** Stack trace omitted because debugger segment size\n" 104*7c478bd9Sstevel@tonic-gate "\t*** and/or length not set.\n"); 105*7c478bd9Sstevel@tonic-gate return; 106*7c478bd9Sstevel@tonic-gate } 107*7c478bd9Sstevel@tonic-gate 108*7c478bd9Sstevel@tonic-gate if (!(sp - (uintptr_t)mdb.m_dseg < mdb.m_dsegsz)) { 109*7c478bd9Sstevel@tonic-gate mdb_iob_printf(mdb.m_err, 110*7c478bd9Sstevel@tonic-gate "\t*** Stack trace omitted because sp (%p) isn't in the\n" 111*7c478bd9Sstevel@tonic-gate "\t*** debugger segment.\n", sp); 112*7c478bd9Sstevel@tonic-gate return; 113*7c478bd9Sstevel@tonic-gate } 114*7c478bd9Sstevel@tonic-gate 115*7c478bd9Sstevel@tonic-gate /* 116*7c478bd9Sstevel@tonic-gate * We were on a kmdb stack when we took this fault. We're going to 117*7c478bd9Sstevel@tonic-gate * assume that there's nothing weird on the stack, and that, therefore, 118*7c478bd9Sstevel@tonic-gate * we can use a simple algorithm to dump it. 119*7c478bd9Sstevel@tonic-gate */ 120*7c478bd9Sstevel@tonic-gate 121*7c478bd9Sstevel@tonic-gate print_stack(sp, safe); 122*7c478bd9Sstevel@tonic-gate } 123