1 /* $OpenBSD: db_machdep.h,v 1.19 2021/08/30 08:11:12 jasper Exp $ */ 2 /* $NetBSD: db_machdep.h,v 1.2 2003/04/29 17:06:04 scw Exp $ */ 3 4 /* 5 * Mach Operating System 6 * Copyright (c) 1991,1990 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 #ifndef _MACHINE_DB_MACHDEP_H_ 31 #define _MACHINE_DB_MACHDEP_H_ 32 33 /* 34 * Machine-dependent defines for new kernel debugger. 35 */ 36 37 #include <sys/param.h> 38 #include <uvm/uvm_extern.h> 39 #include <machine/trap.h> 40 #include <sys/mutex.h> 41 42 typedef long db_expr_t; /* expression - signed */ 43 44 typedef struct trapframe db_regs_t; 45 46 extern db_regs_t ddb_regs; /* register state */ 47 48 #define PC_REGS(regs) ((vaddr_t)(regs)->tf_rip) 49 #define SET_PC_REGS(regs, value) (regs)->tf_rip = (int64_t)(value) 50 51 #define BKPT_ADDR(addr) (addr) /* breakpoint address */ 52 #define BKPT_INST 0xcc /* breakpoint instruction */ 53 #define BKPT_SIZE (1) /* size of breakpoint inst */ 54 #define BKPT_SET(inst) (BKPT_INST) 55 56 #define SSF_INST 0x55 57 #define SSF_SIZE (1) 58 59 #define FIXUP_PC_AFTER_BREAK(regs) ((regs)->tf_rip -= BKPT_SIZE) 60 61 #define db_clear_single_step(regs) ((regs)->tf_rflags &= ~PSL_T) 62 #define db_set_single_step(regs) ((regs)->tf_rflags |= PSL_T) 63 64 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT) 65 #define IS_WATCHPOINT_TRAP(type, code) ((type) == T_TRCTRAP && (code) & 15) 66 67 #define I_CALL 0xe8 68 #define I_CALLI 0xff 69 #define I_RET 0xc3 70 #define I_IRET 0xcf 71 72 #define inst_trap_return(ins) (((ins)&0xff) == I_IRET) 73 #define inst_return(ins) (((ins)&0xff) == I_RET) 74 #define inst_call(ins) (((ins)&0xff) == I_CALL || \ 75 (((ins)&0xff) == I_CALLI && \ 76 ((ins)&0x3800) == 0x1000)) 77 78 /* macro for checking if a thread has used floating-point */ 79 80 int db_ktrap(int, int, db_regs_t *); 81 82 void db_machine_init(void); 83 int db_enter_ddb(void); 84 void db_startcpu(int); 85 void db_stopcpu(int); 86 void x86_ipi_db(struct cpu_info *); 87 88 #define DDB_STATE_NOT_RUNNING 0 89 #define DDB_STATE_RUNNING 1 90 #define DDB_STATE_EXITING 2 91 92 /* 93 * We define some of our own commands 94 */ 95 #define DB_MACHINE_COMMANDS 96 97 extern void db_machine_init(void); 98 99 extern void cpu_debug_dump(void); 100 101 #endif /* _MACHINE_DB_MACHDEP_H_ */ 102