1 /* $OpenBSD: db_machdep.h,v 1.2 1997/03/21 00:48:48 niklas Exp $ */ 2 /* $NetBSD: db_machdep.h,v 1.13 2002/05/13 06:05:32 matt Exp $ */ 3 4 /* 5 * Mach Operating System 6 * Copyright (c) 1992 Carnegie Mellon University 7 * All Rights Reserved. 8 * 9 * Permission to use, copy, modify and distribute this software and its 10 * documentation is hereby granted, provided that both the copyright 11 * notice and this permission notice appear in all copies of the 12 * software, derivative works or modified versions, and any portions 13 * thereof, and that both notices appear in supporting documentation. 14 * 15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 17 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 18 * 19 * Carnegie Mellon requests users of this software to return to 20 * 21 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 22 * School of Computer Science 23 * Carnegie Mellon University 24 * Pittsburgh PA 15213-3890 25 * 26 * any improvements or extensions that they make and grant Carnegie Mellon 27 * the rights to redistribute these changes. 28 */ 29 30 /* 31 * Machine-dependent defines for new kernel debugger. 32 */ 33 #ifndef _PPC_DB_MACHDEP_H_ 34 #define _PPC_DB_MACHDEP_H_ 35 36 #include <uvm/uvm_prot.h> 37 #include <uvm/uvm_param.h> 38 #include <machine/trap.h> 39 40 #ifdef _KERNEL 41 #include "opt_ppcarch.h" 42 #endif 43 44 #define DB_ELF_SYMBOLS 45 #define DB_ELFSIZE 32 46 47 typedef vaddr_t db_addr_t; /* address - unsigned */ 48 typedef long db_expr_t; /* expression - signed */ 49 struct powerpc_saved_state { 50 u_int32_t r[32]; /* data registers */ 51 u_int32_t iar; 52 u_int32_t msr; 53 u_int32_t lr; 54 u_int32_t ctr; 55 u_int32_t cr; 56 u_int32_t xer; 57 u_int32_t dear; 58 u_int32_t esr; 59 u_int32_t pid; 60 }; 61 typedef struct powerpc_saved_state db_regs_t; 62 extern db_regs_t ddb_regs; /* register state */ 63 #define DDB_REGS (&ddb_regs) 64 65 #define PC_REGS(regs) ((db_addr_t)(regs)->iar) 66 67 #define BKPT_ASM "trap" /* should match BKPT_INST */ 68 #define BKPT_INST 0x7fe00008 /* breakpoint instruction */ 69 70 #define BKPT_SIZE (4) /* size of breakpoint inst */ 71 #define BKPT_SET(inst) (BKPT_INST) 72 73 #define SR_SINGLESTEP 0x400 74 #define db_clear_single_step(regs) ((regs)->msr &= ~SR_SINGLESTEP) 75 #define db_set_single_step(regs) ((regs)->msr |= SR_SINGLESTEP) 76 77 #define T_BREAKPOINT 0xffff 78 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAKPOINT) 79 80 #define T_WATCHPOINT 0xeeee 81 #ifdef T_WATCHPOINT 82 #define IS_WATCHPOINT_TRAP(type, code) ((type) == T_WATCHPOINT) 83 #else 84 #define IS_WATCHPOINT_TRAP(type, code) 0 85 #endif 86 87 #define M_RTS 0xfc0007fe 88 #define I_RTS 0x4c000020 89 #define M_BC 0xfc000000 90 #define I_BC 0x40000000 91 #define M_B 0xfc000000 92 #define I_B 0x50000000 93 #define M_RFI 0xfc0007fe 94 #define I_RFI 0x4c000064 95 96 #define inst_trap_return(ins) (((ins)&M_RFI) == I_RFI) 97 #define inst_return(ins) (((ins)&M_RTS) == I_RTS) 98 #define inst_call(ins) (((ins)&M_BC ) == I_BC || \ 99 ((ins)&M_B ) == I_B ) 100 #define inst_load(ins) 0 101 #define inst_store(ins) 0 102 103 /* 104 * GDB's register array is: 105 * 32 4-byte GPRs 106 * 32 8-byte FPRs 107 * 7 4-byte UISA special-purpose registers 108 * 16 4-byte segment registers 109 * 32 4-byte standard OEA special-purpose registers, 110 * and up to 64 4-byte non-standard OES special-purpose registers. 111 * GDB keeps some extra space, so the total size of the register array 112 * they use is 880 bytes (gdb-5.0). 113 */ 114 typedef long kgdb_reg_t; 115 #define KGDB_NUMREGS 220 /* Treat all registers as 4-byte */ 116 #define KGDB_BUFLEN (2*KGDB_NUMREGS*sizeof(kgdb_reg_t)+1) 117 #define KGDB_PPC_PC_REG 96 /* first UISA SP register */ 118 #define KGDB_PPC_MSR_REG 97 119 #define KGDB_PPC_CR_REG 98 120 #define KGDB_PPC_LR_REG 99 121 #define KGDB_PPC_CTR_REG 100 122 #define KGDB_PPC_XER_REG 101 123 #define KGDB_PPC_MQ_REG 102 124 125 #ifdef _KERNEL 126 127 void kdb_kintr __P((void *)); 128 int kdb_trap __P((int, void *)); 129 130 #ifdef PPC_IBM4XX 131 /* 132 * We have machine-dependent commands. 133 */ 134 #define DB_MACHINE_COMMANDS 135 #endif 136 137 #endif /* _KERNEL */ 138 139 #endif /* _PPC_DB_MACHDEP_H_ */ 140