1 /* $OpenBSD: db_machdep.h,v 1.13 2011/03/23 16:54:37 pirofti Exp $ */ 2 /* $NetBSD: db_machdep.h,v 1.12 2001/07/07 15:16:13 eeh 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 <uvm/uvm_extern.h> 38 39 #include <machine/frame.h> 40 #include <machine/psl.h> 41 #include <machine/trap.h> 42 #include <machine/reg.h> 43 44 /* end of mangling */ 45 46 typedef vaddr_t db_addr_t; /* address - unsigned */ 47 typedef long db_expr_t; /* expression - signed */ 48 49 struct trapstate { 50 int64_t tstate; 51 int64_t tpc; 52 int64_t tnpc; 53 int64_t tt; 54 }; 55 #if 1 56 typedef struct { 57 struct trapframe64 ddb_tf; 58 struct frame64 ddb_fr; 59 struct trapstate ddb_ts[5]; 60 int ddb_tl; 61 struct fpstate64 ddb_fpstate; 62 } db_regs_t; 63 #else 64 typedef struct db_regs { 65 struct trapregs dbr_traps[4]; 66 int dbr_y; 67 char dbr_tl; 68 char dbr_canrestore; 69 char dbr_cansave; 70 char dbr_cleanwin; 71 char dbr_cwp; 72 char dbr_wstate; 73 int64_t dbr_g[8]; 74 int64_t dbr_ag[8]; 75 int64_t dbr_ig[8]; 76 int64_t dbr_mg[8]; 77 int64_t dbr_out[8]; 78 int64_t dbr_local[8]; 79 int64_t dbr_in[8]; 80 } db_regs_t; 81 #endif 82 83 extern db_regs_t ddb_regs; /* register state */ 84 #define DDB_REGS (&ddb_regs) 85 #define DDB_TF (&ddb_regs.ddb_tf) 86 #define DDB_FR (&ddb_regs.ddb_fr) 87 #define DDB_FP (&ddb_regs.ddb_fpstate) 88 89 #define PC_REGS(regs) ((db_addr_t)(regs)->ddb_tf.tf_pc) 90 #define SET_PC_REGS(regs, value) (regs)->ddb_tf.tf_pc = (int32_t)(value) 91 #define PC_ADVANCE(regs) do { \ 92 vaddr_t n = (regs)->ddb_tf.tf_npc; \ 93 (regs)->ddb_tf.tf_pc = n; \ 94 (regs)->ddb_tf.tf_npc = n + 4; \ 95 } while(0) 96 97 #define BKPT_INST 0x91d02001 /* breakpoint instruction */ 98 #define BKPT_SIZE (4) /* size of breakpoint inst */ 99 #define BKPT_SET(inst) (BKPT_INST) 100 101 #define IS_BREAKPOINT_TRAP(type, code) \ 102 ((type) == T_BREAKPOINT || (type) == T_KGDB_EXEC) 103 #define IS_WATCHPOINT_TRAP(type, code) \ 104 ((type) ==T_PA_WATCHPT || (type) == T_VA_WATCHPT) 105 106 /* 107 * Sparc cpus have no hardware single-step. 108 */ 109 #define SOFTWARE_SSTEP 110 111 boolean_t db_inst_trap_return(int inst); 112 boolean_t db_inst_return(int inst); 113 boolean_t db_inst_call(int inst); 114 boolean_t db_inst_branch(int inst); 115 boolean_t db_inst_unconditional_flow_transfer(int inst); 116 db_addr_t db_branch_taken(int inst, db_addr_t pc, db_regs_t *regs); 117 void db_machine_init(void); 118 119 #define inst_trap_return(ins) db_inst_trap_return(ins) 120 #define inst_return(ins) db_inst_return(ins) 121 #define inst_call(ins) db_inst_call(ins) 122 #define inst_branch(ins) db_inst_branch(ins) 123 #define inst_unconditional_flow_transfer(ins) \ 124 db_inst_unconditional_flow_transfer(ins) 125 #define branch_taken(ins, pc, fun, regs) \ 126 db_branch_taken((ins), (pc), (regs)) 127 128 /* see note in db_interface.c about reversed breakpoint addrs */ 129 #define next_instr_address(pc, bd) \ 130 ((bd) ? (pc) : ddb_regs.ddb_tf.tf_npc) 131 132 #define DB_MACHINE_COMMANDS 133 134 void db_machine_init(void); 135 int kdb_trap(int, struct trapframe64 *); 136 137 /* 138 * We will use elf symbols in DDB when they work. 139 */ 140 #define DB_ELF_SYMBOLS 141 #define DB_ELFSIZE 64 142 143 /* Register device-specific method for triggering XIRs. */ 144 void db_register_xir(void (*)(void *, int), void *); 145 146 #endif /* _MACHINE_DB_MACHDEP_H_ */ 147