1 /* $NetBSD: db_machdep.h,v 1.2 1997/07/07 03:57:55 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 names */ 40 #include <mips/proc.h> /* register state */ 41 42 43 typedef vm_offset_t db_addr_t; /* address - unsigned */ 44 typedef long db_expr_t; /* expression - signed */ 45 46 typedef struct frame db_regs_t; 47 48 db_regs_t ddb_regs; /* register state */ 49 #define DDB_REGS (&ddb_regs) 50 51 #define PC_REGS(regs) ((db_addr_t)(regs)->f_regs[PC]) 52 53 #define BKPT_INST 0x0001000D /* XXX endianness? */ 54 #define BKPT_SIZE (4) /* size of breakpoint inst */ 55 #define BKPT_SET(inst) (BKPT_INST) 56 57 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAK) 58 #define IS_WATCHPOINT_TRAP(type, code) (0) /* XXX mips3 watchpoint */ 59 60 #define inst_trap_return(ins) ((ins)&0) 61 #define inst_return(ins) ((ins)&0) 62 #define inst_load(ins) 0 63 #define inst_store(ins) 0 64 65 /* 66 * Interface to disassembly (shared with mdb) 67 */ 68 db_addr_t db_disasm_insn __P((int insn, db_addr_t loc, boolean_t altfmt)); 69 70 71 /* 72 * Entrypoints to DDB for kernel, keyboard drivers, init hook 73 */ 74 void kdb_kbd_trap __P((db_regs_t *)); 75 int kdb_trap __P((int type, db_regs_t *)); 76 void db_machine_init __P((void)); 77 78 79 /* 80 * We use ELF symbols in DDB. 81 * 82 */ 83 /* #define DB_ELF_SYMBOLS */ 84 #define DB_AOUT_SYMBOLS */ 85 86 /* 87 * MIPS cpus have no hardware single-step. 88 */ 89 #define SOFTWARE_SSTEP 90 91 boolean_t inst_branch __P((int inst)); 92 boolean_t inst_call __P((int inst)); 93 boolean_t inst_unconditional_flow_transfer __P((int inst)); 94 db_addr_t branch_taken __P((int inst, db_addr_t pc, db_regs_t *regs)); 95 db_addr_t next_instr_address __P((db_addr_t pc, boolean_t bd)); 96 97 /* 98 * We have machine-dependent commands. 99 */ 100 #define DB_MACHINE_COMMANDS 101 102 #endif /* _MIPS_DB_MACHDEP_H_ */ 103