1 /* $NetBSD: db_machdep.h,v 1.6 1997/09/06 02:02:25 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Carnegie-Mellon University. 5 * All rights reserved. 6 * 7 * Author: Chris G. Demetriou 8 * 9 * Permission to use, copy, modify and distribute this software and 10 * its 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 17 * FOR 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 the 27 * rights to redistribute these changes. 28 */ 29 30 #ifndef _ALPHA_DB_MACHDEP_H_ 31 #define _ALPHA_DB_MACHDEP_H_ 32 33 /* 34 * Machine-dependent defines for new kernel debugger. 35 */ 36 37 #include <sys/param.h> 38 #include <vm/vm.h> 39 #include <machine/frame.h> 40 41 typedef vm_offset_t db_addr_t; /* address - unsigned */ 42 typedef long db_expr_t; /* expression - signed */ 43 44 typedef struct trapframe db_regs_t; 45 db_regs_t ddb_regs; /* register state */ 46 #define DDB_REGS (&ddb_regs) 47 48 #define PC_REGS(regs) ((db_addr_t)(regs)->tf_regs[FRAME_PC]) 49 50 #define BKPT_INST 0x00000080 /* breakpoint instruction */ 51 #define BKPT_SIZE (4) /* size of breakpoint inst */ 52 #define BKPT_SET(inst) (BKPT_INST) 53 54 #if 0 55 #define FIXUP_PC_AFTER_BREAK(regs) \ 56 ((regs)->tf_regs[FRAME_PC] -= BKPT_SIZE) 57 #endif 58 59 #define SOFTWARE_SSTEP 1 /* no hardware support */ 60 #define IS_BREAKPOINT_TRAP(type, code) ((type) == ALPHA_KENTRY_IF && \ 61 (code) == ALPHA_IF_CODE_BPT) 62 #define IS_WATCHPOINT_TRAP(type, code) 0 63 64 /* 65 * Functions needed for software single-stepping. 66 */ 67 68 boolean_t db_inst_trap_return __P((int inst)); 69 boolean_t db_inst_return __P((int inst)); 70 boolean_t db_inst_call __P((int inst)); 71 boolean_t db_inst_branch __P((int inst)); 72 boolean_t db_inst_load __P((int inst)); 73 boolean_t db_inst_store __P((int inst)); 74 boolean_t db_inst_unconditional_flow_transfer __P((int inst)); 75 db_addr_t db_branch_taken __P((int inst, db_addr_t pc, db_regs_t *regs)); 76 77 #define inst_trap_return(ins) db_inst_trap_return(ins) 78 #define inst_return(ins) db_inst_return(ins) 79 #define inst_call(ins) db_inst_call(ins) 80 #define inst_branch(ins) db_inst_branch(ins) 81 #define inst_load(ins) db_inst_load(ins) 82 #define inst_store(ins) db_inst_store(ins) 83 #define inst_unconditional_flow_transfer(ins) \ 84 db_inst_unconditional_flow_transfer(ins) 85 #define branch_taken(ins, pc, regs) \ 86 db_branch_taken((ins), (pc), (regs)) 87 88 /* No delay slots on Alpha. */ 89 #define next_instr_address(v, b) ((db_addr_t) ((b) ? (v) : ((v) + 4))) 90 91 u_long db_register_value __P((db_regs_t *, int)); 92 int ddb_trap __P((unsigned long, unsigned long, unsigned long, 93 unsigned long, struct trapframe *)); 94 95 /* 96 * We define some of our own commands. 97 */ 98 #define DB_MACHINE_COMMANDS 99 100 /* 101 * We use Elf64 symbols in DDB. 102 */ 103 #define DB_ELF_SYMBOLS 104 #define DB_ELFSIZE 64 105 106 #endif /* _ALPHA_DB_MACHDEP_H_ */ 107