1 /* $NetBSD: db_machdep.h,v 1.35 2023/09/26 14:33:55 tsutsui Exp $ */ 2 3 /* 4 * Mach Operating System 5 * Copyright (c) 1992 Carnegie Mellon University 6 * All Rights Reserved. 7 * 8 * Permission to use, copy, modify and distribute this software and its 9 * documentation is hereby granted, provided that both the copyright 10 * notice and this permission notice appear in all copies of the 11 * software, derivative works or modified versions, and any portions 12 * thereof, and that both notices appear in supporting documentation. 13 * 14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 15 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 16 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 17 * 18 * Carnegie Mellon requests users of this software to return to 19 * 20 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 21 * School of Computer Science 22 * Carnegie Mellon University 23 * Pittsburgh PA 15213-3890 24 * 25 * any improvements or extensions that they make and grant Carnegie Mellon 26 * the rights to redistribute these changes. 27 */ 28 29 /* 30 * Machine-dependent defines for new kernel debugger. 31 */ 32 #ifndef _M68K_DB_MACHDEP_H_ 33 #define _M68K_DB_MACHDEP_H_ 34 35 #if !defined(_KERNEL) && !defined(_STANDALONE) 36 #include <stddef.h> 37 #include <stdbool.h> 38 #include <string.h> 39 #endif /* _KERNEL || _STANDALONE */ 40 41 #include <sys/types.h> 42 43 #include <uvm/uvm_extern.h> 44 45 #include <machine/frame.h> 46 #include <machine/pcb.h> 47 #include <machine/psl.h> 48 #include <machine/trap.h> 49 50 typedef vaddr_t db_addr_t; /* address - unsigned */ 51 #define DDB_EXPR_FMT "l" /* expression is long */ 52 typedef long db_expr_t; /* expression - signed */ 53 typedef struct trapframe db_regs_t; 54 55 extern db_regs_t ddb_regs; /* register state */ 56 #define DDB_REGS (&ddb_regs) 57 58 #define PC_REGS(regs) ((regs)->tf_pc) 59 60 #define BKPT_ADDR(addr) (addr) /* breakpoint address */ 61 #define BKPT_INST 0x4e4f /* breakpoint instruction */ 62 #define BKPT_SIZE (2) /* size of breakpoint inst */ 63 #define BKPT_SET(inst, addr) (BKPT_INST) 64 65 #define FIXUP_PC_AFTER_BREAK(regs) ((regs)->tf_pc -= BKPT_SIZE) 66 67 #define db_clear_single_step(regs) ((regs)->tf_sr &= ~PSL_T) 68 #define db_set_single_step(regs) ((regs)->tf_sr |= PSL_T) 69 70 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAKPOINT) 71 #ifdef T_WATCHPOINT 72 #define IS_WATCHPOINT_TRAP(type, code) ((type) == T_WATCHPOINT) 73 #else 74 #define IS_WATCHPOINT_TRAP(type, code) 0 75 #endif 76 77 #define M_RTS 0xffff0000 78 #define I_RTS 0x4e750000 79 #define M_JSR 0xffc00000 80 #define I_JSR 0x4e800000 81 #define M_BSR 0xff000000 82 #define I_BSR 0x61000000 83 #define M_RTE 0xffff0000 84 #define I_RTE 0x4e730000 85 86 #define inst_trap_return(ins) (((ins)&M_RTE) == I_RTE) 87 #define inst_return(ins) (((ins)&M_RTS) == I_RTS) 88 #define inst_call(ins) (((ins)&M_JSR) == I_JSR || \ 89 ((ins)&M_BSR) == I_BSR) 90 #define inst_load(ins) 0 91 #define inst_store(ins) 0 92 93 /* 94 * Things needed by kgdb: 95 */ 96 typedef long kgdb_reg_t; 97 #define KGDB_NUMREGS (16+2) 98 #define KGDB_BUFLEN 512 99 100 101 #ifdef _KERNEL 102 103 void Debugger(void); /* XXX */ 104 void kdb_kintr(db_regs_t *); 105 int kdb_trap(int, db_regs_t *); 106 107 #endif /* _KERNEL */ 108 109 /* 110 * We use Elf32 symbols in DDB. 111 */ 112 #define DB_ELF_SYMBOLS 113 114 #endif /* _M68K_DB_MACHDEP_H_ */ 115