1 /* $NetBSD: db_interface.c,v 1.26 2011/01/22 20:24:48 skrll Exp $ */ 2 3 /* $OpenBSD: db_interface.c,v 1.16 2001/03/22 23:31:45 mickey Exp $ */ 4 5 /* 6 * Copyright (c) 1999-2003 Michael Shalayeff 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT, 22 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 24 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 26 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 27 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28 * THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: db_interface.c,v 1.26 2011/01/22 20:24:48 skrll Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/proc.h> 37 38 #include <machine/db_machdep.h> 39 #include <machine/frame.h> 40 #include <machine/cpufunc.h> 41 42 #include <ddb/db_access.h> 43 #include <ddb/db_command.h> 44 #include <ddb/db_output.h> 45 #include <ddb/db_run.h> 46 #include <ddb/db_sym.h> 47 #include <ddb/db_variables.h> 48 #include <ddb/db_extern.h> 49 #include <ddb/db_interface.h> 50 #include <ddb/ddbvar.h> 51 52 #include <dev/cons.h> 53 54 void kdbprinttrap(int, int); 55 56 extern label_t *db_recover; 57 extern int db_active; 58 extern const char *trap_type[]; 59 extern int trap_types; 60 61 db_regs_t ddb_regs; 62 const struct db_variable db_regs[] = { 63 { "flags", (long *)&ddb_regs.tf_flags, FCN_NULL }, 64 { "r1", (long *)&ddb_regs.tf_r1, FCN_NULL }, 65 { "r2(rp)", (long *)&ddb_regs.tf_rp, FCN_NULL }, 66 { "r3(fp)", (long *)&ddb_regs.tf_r3, FCN_NULL }, 67 { "r4", (long *)&ddb_regs.tf_r4, FCN_NULL }, 68 { "r5", (long *)&ddb_regs.tf_r5, FCN_NULL }, 69 { "r6", (long *)&ddb_regs.tf_r6, FCN_NULL }, 70 { "r7", (long *)&ddb_regs.tf_r7, FCN_NULL }, 71 { "r8", (long *)&ddb_regs.tf_r8, FCN_NULL }, 72 { "r9", (long *)&ddb_regs.tf_r9, FCN_NULL }, 73 { "r10", (long *)&ddb_regs.tf_r10, FCN_NULL }, 74 { "r11", (long *)&ddb_regs.tf_r11, FCN_NULL }, 75 { "r12", (long *)&ddb_regs.tf_r12, FCN_NULL }, 76 { "r13", (long *)&ddb_regs.tf_r13, FCN_NULL }, 77 { "r14", (long *)&ddb_regs.tf_r14, FCN_NULL }, 78 { "r15", (long *)&ddb_regs.tf_r15, FCN_NULL }, 79 { "r16", (long *)&ddb_regs.tf_r16, FCN_NULL }, 80 { "r17", (long *)&ddb_regs.tf_r17, FCN_NULL }, 81 { "r18", (long *)&ddb_regs.tf_r18, FCN_NULL }, 82 { "r19(t4)", (long *)&ddb_regs.tf_t4, FCN_NULL }, 83 { "r20(t3)", (long *)&ddb_regs.tf_t3, FCN_NULL }, 84 { "r21(t2)", (long *)&ddb_regs.tf_t2, FCN_NULL }, 85 { "r22(t1)", (long *)&ddb_regs.tf_t1, FCN_NULL }, 86 { "r23(arg3)", (long *)&ddb_regs.tf_arg3, FCN_NULL }, 87 { "r24(arg2)", (long *)&ddb_regs.tf_arg2, FCN_NULL }, 88 { "r25(arg1)", (long *)&ddb_regs.tf_arg1, FCN_NULL }, 89 { "r26(arg0)", (long *)&ddb_regs.tf_arg0, FCN_NULL }, 90 { "r27(dp)", (long *)&ddb_regs.tf_dp, FCN_NULL }, 91 { "r28(ret0)", (long *)&ddb_regs.tf_ret0, FCN_NULL }, 92 { "r29(ret1)", (long *)&ddb_regs.tf_ret1, FCN_NULL }, 93 { "r30(sp)", (long *)&ddb_regs.tf_sp, FCN_NULL }, 94 { "r31", (long *)&ddb_regs.tf_r31, FCN_NULL }, 95 96 { "sar", (long *)&ddb_regs.tf_sar, FCN_NULL }, 97 98 { "eirr", (long *)&ddb_regs.tf_eirr, FCN_NULL }, 99 { "eiem", (long *)&ddb_regs.tf_eiem, FCN_NULL }, 100 { "iir", (long *)&ddb_regs.tf_iir, FCN_NULL }, 101 { "isr", (long *)&ddb_regs.tf_isr, FCN_NULL }, 102 { "ior", (long *)&ddb_regs.tf_ior, FCN_NULL }, 103 { "ipsw", (long *)&ddb_regs.tf_ipsw, FCN_NULL }, 104 { "iisqh", (long *)&ddb_regs.tf_iisq_head, FCN_NULL }, 105 { "iioqh", (long *)&ddb_regs.tf_iioq_head, FCN_NULL }, 106 { "iisqt", (long *)&ddb_regs.tf_iisq_tail, FCN_NULL }, 107 { "iioqt", (long *)&ddb_regs.tf_iioq_tail, FCN_NULL }, 108 109 { "sr0", (long *)&ddb_regs.tf_sr0, FCN_NULL }, 110 { "sr1", (long *)&ddb_regs.tf_sr1, FCN_NULL }, 111 { "sr2", (long *)&ddb_regs.tf_sr2, FCN_NULL }, 112 { "sr3", (long *)&ddb_regs.tf_sr3, FCN_NULL }, 113 { "sr4", (long *)&ddb_regs.tf_sr4, FCN_NULL }, 114 { "sr5", (long *)&ddb_regs.tf_sr5, FCN_NULL }, 115 { "sr6", (long *)&ddb_regs.tf_sr6, FCN_NULL }, 116 { "sr7", (long *)&ddb_regs.tf_sr7, FCN_NULL }, 117 118 { "pidr1", (long *)&ddb_regs.tf_pidr1, FCN_NULL }, 119 { "pidr2", (long *)&ddb_regs.tf_pidr2, FCN_NULL }, 120 #ifdef pbably_not_worth_it 121 { "pidr3", (long *)&ddb_regs.tf_pidr3, FCN_NULL }, 122 { "pidr4", (long *)&ddb_regs.tf_pidr4, FCN_NULL }, 123 #endif 124 125 { "vtop", (long *)&ddb_regs.tf_vtop, FCN_NULL }, 126 { "cr24", (long *)&ddb_regs.tf_cr24, FCN_NULL }, 127 { "cr27", (long *)&ddb_regs.tf_cr27, FCN_NULL }, 128 { "cr28", (long *)&ddb_regs.tf_cr28, FCN_NULL }, 129 { "cr30", (long *)&ddb_regs.tf_cr30, FCN_NULL }, 130 }; 131 const struct db_variable * const db_eregs = db_regs + sizeof(db_regs)/sizeof(db_regs[0]); 132 int db_active = 0; 133 134 void 135 cpu_Debugger(void) 136 { 137 __asm volatile ("break %0, %1" 138 :: "i" (HPPA_BREAK_KERNEL), "i" (HPPA_BREAK_KGDB)); 139 } 140 141 /* 142 * Print trap reason. 143 */ 144 void 145 kdbprinttrap(int type, int code) 146 { 147 db_printf("kernel: "); 148 if (type >= trap_types || type < 0) 149 db_printf("type %d", type); 150 else 151 db_printf("%s", trap_type[type]); 152 db_printf(" trap, code=%x\n", code); 153 } 154 155 /* 156 * kdb_trap - field a BPT trap 157 */ 158 int 159 kdb_trap(int type, int code, db_regs_t *regs) 160 { 161 int s; 162 163 switch (type) { 164 case T_RECOVERY: 165 case T_IBREAK: 166 case T_DBREAK: 167 case -1: 168 break; 169 default: 170 if (!db_onpanic && db_recover == 0) 171 return 0; 172 173 kdbprinttrap(type, code); 174 if (db_recover != 0) { 175 db_error("Caught exception in DDB; continuing...\n"); 176 /* NOT REACHED */ 177 } 178 } 179 180 /* XXX Should switch to kdb`s own stack here. */ 181 182 ddb_regs = *regs; 183 184 s = splhigh(); 185 db_active++; 186 cnpollc(true); 187 db_trap(type, code); 188 cnpollc(false); 189 db_active--; 190 splx(s); 191 192 *regs = ddb_regs; 193 return 1; 194 } 195 196 /* 197 * Validate an address for use as a breakpoint. 198 * Any address is allowed for now. 199 */ 200 int 201 db_valid_breakpoint(db_addr_t addr) 202 { 203 return 1; 204 } 205