1 /* $NetBSD: db_machdep.h,v 1.3 1997/07/19 09:54:25 jonathan Exp $ */ 2 3 /* 4 * Copyright (c) 1997 Jonathan Stone (hereinafter referred to as the author) 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Jonathan Stone for 18 * the NetBSD Project. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 #ifndef _MIPS_DB_MACHDEP_H_ 35 #define _MIPS_DB_MACHDEP_H_ 36 37 #include <vm/vm_param.h> /* XXX boolean_t */ 38 #include <mips/trap.h> /* T_BREAK */ 39 #include <mips/reg.h> /* register state */ 40 #include <mips/regnum.h> /* symbolic register indices */ 41 #include <mips/proc.h> /* register state */ 42 43 44 typedef vm_offset_t db_addr_t; /* address - unsigned */ 45 typedef long db_expr_t; /* expression - signed */ 46 47 typedef struct frame db_regs_t; 48 49 db_regs_t ddb_regs; /* register state */ 50 #define DDB_REGS (&ddb_regs) 51 52 #define PC_REGS(regs) ((db_addr_t)(regs)->f_regs[PC]) 53 54 #define BKPT_INST 0x0001000D /* XXX endianness? */ 55 #define BKPT_SIZE (4) /* size of breakpoint inst */ 56 #define BKPT_SET(inst) (BKPT_INST) 57 58 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAK) 59 #define IS_WATCHPOINT_TRAP(type, code) (0) /* XXX mips3 watchpoint */ 60 61 #define inst_trap_return(ins) ((ins)&0) 62 #define inst_return(ins) ((ins)&0) 63 #define inst_load(ins) 0 64 #define inst_store(ins) 0 65 66 /* 67 * Interface to disassembly (shared with mdb) 68 */ 69 db_addr_t db_disasm_insn __P((int insn, db_addr_t loc, boolean_t altfmt)); 70 71 72 /* 73 * Entrypoints to DDB for kernel, keyboard drivers, init hook 74 */ 75 void kdb_kbd_trap __P((db_regs_t *)); 76 int kdb_trap __P((int type, db_regs_t *)); 77 void db_machine_init __P((void)); 78 79 80 /* 81 * We use ELF symbols in DDB. 82 * 83 */ 84 /* #define DB_ELF_SYMBOLS */ 85 #define DB_AOUT_SYMBOLS */ 86 87 /* 88 * MIPS cpus have no hardware single-step. 89 */ 90 #define SOFTWARE_SSTEP 91 92 boolean_t inst_branch __P((int inst)); 93 boolean_t inst_call __P((int inst)); 94 boolean_t inst_unconditional_flow_transfer __P((int inst)); 95 db_addr_t branch_taken __P((int inst, db_addr_t pc, db_regs_t *regs)); 96 db_addr_t next_instr_address __P((db_addr_t pc, boolean_t bd)); 97 98 /* 99 * We have machine-dependent commands. 100 */ 101 #define DB_MACHINE_COMMANDS 102 103 #endif /* _MIPS_DB_MACHDEP_H_ */ 104