1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 /* 29 * Intel-specific portions of the DPI 30 */ 31 32 #include <sys/types.h> 33 #include <sys/trap.h> 34 35 #include <kmdb/kmdb_dpi_impl.h> 36 #include <kmdb/kmdb_fault.h> 37 #include <kmdb/kmdb_kdi.h> 38 #include <mdb/mdb_err.h> 39 #include <mdb/mdb_debug.h> 40 #include <mdb/mdb_kreg.h> 41 #include <mdb/mdb.h> 42 43 void 44 kmdb_dpi_handle_fault(kreg_t trapno, kreg_t pc, kreg_t sp, int cpuid) 45 { 46 kmdb_kdi_system_claim(); 47 48 mdb_dprintf(MDB_DBG_DPI, "\ndpi_handle_fault: trapno %u, pc 0x%0?p, " 49 "sp 0x%0?p\n", (int)trapno, pc, sp); 50 51 switch (trapno) { 52 case T_GPFLT: 53 errno = EACCES; 54 default: 55 errno = EMDB_NOMAP; 56 } 57 58 if (kmdb_dpi_fault_pcb != NULL) { 59 longjmp(*kmdb_dpi_fault_pcb, 1); 60 /*NOTREACHED*/ 61 } 62 63 /* Debugger fault */ 64 kmdb_fault(trapno, pc, sp, cpuid); 65 } 66 67 /*ARGSUSED*/ 68 int 69 kmdb_dpi_get_register(const char *regname, kreg_t *kregp) 70 { 71 return (mdb.m_dpi->dpo_get_register(regname, kregp)); 72 } 73 74 /*ARGSUSED*/ 75 int 76 kmdb_dpi_set_register(const char *regname, kreg_t kreg) 77 { 78 return (mdb.m_dpi->dpo_set_register(regname, kreg)); 79 } 80 81 /* 82 * Continue/resume handling. If the target calls kmdb_dpi_resume(), it 83 * expects that the world will be resumed, and that the call will return 84 * when the world has stopped again. 85 * 86 * For support, we have resume_return(), which is called from main() when 87 * the continuation has completed (when the world has stopped again). 88 * set_resume_exit() tells where to jump to actually restart the world. 89 * 90 * CAUTION: This routine may be called *after* mdb_destroy. 91 */ 92 void 93 kmdb_dpi_resume_common(int cmd) 94 { 95 kreg_t pc, trapno; 96 97 ASSERT(kmdb_dpi_resume_requested == 0); 98 99 if (setjmp(kmdb_dpi_resume_pcb) == 0) { 100 (void) kmdb_dpi_get_register("pc", &pc); 101 mdb_dprintf(MDB_DBG_PROC, "Resume requested, pc is %p\n", 102 (void *)pc); 103 104 if (cmd != KMDB_DPI_CMD_RESUME_UNLOAD) 105 kmdb_dpi_resume_requested = 1; 106 107 longjmp(kmdb_dpi_entry_pcb, cmd); 108 /*NOTREACHED*/ 109 110 } else { 111 (void) kmdb_dpi_get_register("pc", &pc); 112 (void) kmdb_dpi_get_register("trapno", &trapno); 113 mdb_dprintf(MDB_DBG_PROC, "Back from resume, pc: %p, " 114 "trapno: %u\n", (void *)pc, (int)trapno); 115 116 kmdb_dpi_resume_requested = 0; 117 118 switch (trapno) { 119 case T_BPTFLT: 120 kmdb_dpi_set_state(DPI_STATE_FAULTED, 121 DPI_STATE_WHY_BKPT); 122 break; 123 case T_DBGENTR: 124 kmdb_dpi_set_state(DPI_STATE_STOPPED, 0); 125 break; 126 default: 127 kmdb_dpi_set_state(DPI_STATE_FAULTED, 128 DPI_STATE_WHY_TRAP); 129 break; 130 } 131 } 132 133 mdb_dprintf(MDB_DBG_PROC, "returning from resume\n"); 134 } 135 136 void 137 kmdb_dpi_reboot(void) 138 { 139 /* 140 * We're going to skip all of the niceties we employ in resume_common, 141 * as we don't plan to ever return. 142 */ 143 longjmp(kmdb_dpi_entry_pcb, KMDB_DPI_CMD_REBOOT); 144 } 145 146 void 147 kmdb_dpi_msr_add(const kdi_msr_t *msrs) 148 { 149 mdb.m_dpi->dpo_msr_add(msrs); 150 } 151 152 uint64_t 153 kmdb_dpi_msr_get(uint_t msr) 154 { 155 return (mdb.m_dpi->dpo_msr_get(DPI_MASTER_CPUID, msr)); 156 } 157 158 uint64_t 159 kmdb_dpi_msr_get_by_cpu(int cpuid, uint_t msr) 160 { 161 return (mdb.m_dpi->dpo_msr_get(cpuid, msr)); 162 } 163