1 /* 2 * Mach Operating System 3 * Copyright (c) 1992 Carnegie Mellon University 4 * All Rights Reserved. 5 * 6 * Permission to use, copy, modify and distribute this software and its 7 * documentation is hereby granted, provided that both the copyright 8 * notice and this permission notice appear in all copies of the 9 * software, derivative works or modified versions, and any portions 10 * thereof, and that both notices appear in supporting documentation. 11 * 12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 15 * 16 * Carnegie Mellon requests users of this software to return to 17 * 18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 19 * School of Computer Science 20 * Carnegie Mellon University 21 * Pittsburgh PA 15213-3890 22 * 23 * any improvements or extensions that they make and grant Carnegie Mellon 24 * the rights to redistribute these changes. 25 * 26 * $OpenBSD: db_machdep.h,v 1.2 1997/03/21 00:48:48 niklas Exp $ 27 * $NetBSD: db_machdep.h,v 1.4.22.1 2000/08/05 11:10:43 wiz Exp $ 28 * $FreeBSD$ 29 */ 30 31 /* 32 * Machine-dependent defines for new kernel debugger. 33 */ 34 #ifndef _POWERPC_DB_MACHDEP_H_ 35 #define _POWERPC_DB_MACHDEP_H_ 36 37 #define PPC_MPC6XX 38 39 #include <vm/vm_param.h> 40 41 #define DB_ELF_SYMBOLS 42 #define DB_ELFSIZE 32 43 44 typedef vm_offset_t db_addr_t; /* address - unsigned */ 45 typedef long db_expr_t; /* expression - signed */ 46 struct powerpc_saved_state { 47 u_int32_t r[32]; /* data registers */ 48 u_int32_t iar; 49 u_int32_t msr; 50 u_int32_t lr; 51 u_int32_t ctr; 52 u_int32_t cr; 53 u_int32_t xer; 54 u_int32_t dear; 55 u_int32_t esr; 56 u_int32_t pid; 57 }; 58 typedef struct powerpc_saved_state db_regs_t; 59 extern db_regs_t ddb_regs; /* register state */ 60 #define DDB_REGS (&ddb_regs) 61 62 #define PC_REGS(regs) ((db_addr_t)(regs)->iar) 63 64 #define BKPT_INST 0x7C810808 /* breakpoint instruction */ 65 66 #define BKPT_SIZE (4) /* size of breakpoint inst */ 67 #define BKPT_SET(inst) (BKPT_INST) 68 69 #define FIXUP_PC_AFTER_BREAK (DDB_REGS)->iar -= 4; 70 71 #define SR_SINGLESTEP 0x400 72 #define db_clear_single_step(regs) ((regs)->msr &= ~SR_SINGLESTEP) 73 #define db_set_single_step(regs) ((regs)->msr |= SR_SINGLESTEP) 74 75 #define T_BREAKPOINT 0xffff 76 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAKPOINT) 77 78 #define T_WATCHPOINT 0xeeee 79 #ifdef T_WATCHPOINT 80 #define IS_WATCHPOINT_TRAP(type, code) ((type) == T_WATCHPOINT) 81 #else 82 #define IS_WATCHPOINT_TRAP(type, code) 0 83 #endif 84 85 #define M_RTS 0xfc0007fe 86 #define I_RTS 0x4c000020 87 #define M_BC 0xfc000000 88 #define I_BC 0x40000000 89 #define M_B 0xfc000000 90 #define I_B 0x50000000 91 #define M_RFI 0xfc0007fe 92 #define I_RFI 0x4c000064 93 94 #define inst_trap_return(ins) (((ins)&M_RFI) == I_RFI) 95 #define inst_return(ins) (((ins)&M_RTS) == I_RTS) 96 #define inst_call(ins) (((ins)&M_BC ) == I_BC || \ 97 ((ins)&M_B ) == I_B ) 98 #define inst_load(ins) 0 99 #define inst_store(ins) 0 100 101 #define DB_SMALL_VALUE_MAX (0x7fffffff) 102 #define DB_SMALL_VALUE_MIN (-0x40001) 103 104 #ifdef _KERNEL 105 106 void kdb_kintr(void *); 107 int kdb_trap(int, void *); 108 109 #endif /* _KERNEL */ 110 111 #endif /* _POWERPC_DB_MACHDEP_H_ */ 112