1 /* $OpenBSD: db_machdep.h,v 1.24 2011/03/23 16:54:36 pirofti Exp $ */ 2 /* $NetBSD: db_machdep.h,v 1.13 1996/04/29 20:50:08 leo 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 _POWERPC_DB_MACHDEP_H_ 34 #define _POWERPC_DB_MACHDEP_H_ 35 36 #include <sys/types.h> 37 #include <uvm/uvm_param.h> 38 #include <machine/trap.h> 39 40 /* 41 * We use Elf32 symbols in DDB. 42 */ 43 #define DB_ELF_SYMBOLS 44 #define DB_ELFSIZE 32 45 46 typedef vaddr_t db_addr_t; /* address - unsigned */ 47 typedef long db_expr_t; /* expression - signed */ 48 struct powerpc_saved_state { 49 struct trapframe tf; 50 }; 51 typedef struct powerpc_saved_state db_regs_t; 52 extern db_regs_t ddb_regs; /* register state */ 53 #define DDB_REGS (&ddb_regs) 54 55 #define PC_REGS(regs) ((regs)->tf.srr0) 56 #define SET_PC_REGS(regs, value) PC_REGS(regs) = (value) 57 58 #define BKPT_INST 0x7C810808 /* breakpoint instruction */ 59 60 #define BKPT_SIZE (4) /* size of breakpoint inst */ 61 #define BKPT_SET(inst) (BKPT_INST) 62 63 #define FIXUP_PC_AFTER_BREAK(regs) ((regs)->tf.srr0 -= 4) 64 65 #define SR_SINGLESTEP 0x8000 66 #define db_clear_single_step(regs) ((regs)->tf.srr1 &= ~SR_SINGLESTEP) 67 #define db_set_single_step(regs) ((regs)->tf.srr1 |= SR_SINGLESTEP) 68 69 #define T_BREAKPOINT 0xffff 70 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAKPOINT) 71 72 #ifdef T_WATCHPOINT 73 #define IS_WATCHPOINT_TRAP(type, code) ((type) == T_WATCHPOINT) 74 #else 75 #define IS_WATCHPOINT_TRAP(type, code) 0 76 #endif 77 78 #define M_RTS 0xfc0007fe 79 #define I_RTS 0x4c000020 80 #define M_BC 0xfc000000 81 #define I_BC 0x40000000 82 #define M_B 0xfc000000 83 #define I_B 0x50000000 84 #define M_RFI 0xfc0007fe 85 #define I_RFI 0x4c000064 86 87 #define inst_trap_return(ins) (((ins)&M_RFI) == I_RFI) 88 #define inst_return(ins) (((ins)&M_RTS) == I_RTS) 89 #define inst_call(ins) (((ins)&M_BC ) == I_BC || \ 90 ((ins)&M_B ) == I_B ) 91 92 #ifdef _KERNEL 93 94 int db_enter_ddb(void); 95 void db_startcpu(int); 96 void db_stopcpu(int); 97 void ppc_ipi_db(struct cpu_info *); 98 99 void kdb_kintr(void *); 100 int kdb_trap(int, void *); 101 void db_save_regs(struct trapframe *frame); 102 void ddb_trap(void); 103 db_expr_t db_dumpframe(u_int32_t pframe, int (*pr)(const char *, ...)); 104 105 extern struct mutex ddb_mp_mutex; 106 107 #define DDB_STATE_NOT_RUNNING 0 108 #define DDB_STATE_RUNNING 1 109 #define DDB_STATE_EXITING 2 110 111 #endif /* _KERNEL */ 112 113 #endif /* _POWERPC_DB_MACHDEP_H_ */ 114