1/* $OpenBSD: db_machdep.h,v 1.2 1998/09/15 10:50:12 pefo Exp $ */ 2 3/* 4 * Copyright (c) 1998 Per Fogelstrom, Opsycon AB 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed under OpenBSD by 17 * Per Fogelstrom, Opsycon AB, Sweden. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 22 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 23 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 25 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * JNPR: db_machdep.h,v 1.7 2006/10/16 12:30:34 katta 34 * $FreeBSD$ 35 */ 36 37#ifndef _MIPS_DB_MACHDEP_H_ 38#define _MIPS_DB_MACHDEP_H_ 39 40#include <machine/frame.h> 41#include <machine/trap.h> 42#include <machine/endian.h> 43 44typedef struct trapframe db_regs_t; 45extern db_regs_t ddb_regs; /* register state */ 46 47typedef vm_offset_t db_addr_t; /* address - unsigned */ 48typedef register_t db_expr_t; /* expression - signed */ 49 50#if BYTE_ORDER == _BIG_ENDIAN 51#define BYTE_MSF (1) 52#endif 53 54#define SOFTWARE_SSTEP /* Need software single step */ 55#define SOFTWARE_SSTEP_EMUL /* next_instr_address() emulates 100% */ 56db_addr_t next_instr_address(db_addr_t, boolean_t); 57#define BKPT_SIZE (4) 58#define BKPT_SET(ins) (MIPS_BREAK_DDB) 59#define DB_VALID_BREAKPOINT(addr) (((addr) & 3) == 0) 60 61#define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAK) 62#define IS_WATCHPOINT_TRAP(type, code) (0) /* XXX mips3 watchpoint */ 63 64#define PC_REGS() ((db_addr_t)kdb_thrctx->pcb_regs.pc) 65#define BKPT_SKIP \ 66 do { \ 67 if((db_get_value(kdb_frame->pc, sizeof(int), FALSE) & \ 68 ~MIPS_BREAK_VAL_MASK) == MIPS_BREAK_INSTR) { \ 69 kdb_frame->pc += BKPT_SIZE; \ 70 kdb_thrctx->pcb_regs.pc += BKPT_SIZE; \ 71 } \ 72 } while (0); 73 74 75/* 76 * Test of instructions to see class. 77 */ 78#define IT_CALL 0x01 79#define IT_BRANCH 0x02 80#define IT_LOAD 0x03 81#define IT_STORE 0x04 82 83#define inst_branch(i) (db_inst_type(i) == IT_BRANCH) 84#define inst_trap_return(i) ((i) & 0) 85#define inst_call(i) (db_inst_type(i) == IT_CALL) 86#define inst_return(i) ((i) == 0x03e00008) 87#define inst_load(i) (db_inst_type(i) == IT_LOAD) 88#define inst_store(i) (db_inst_type(i) == IT_STORE) 89 90#define DB_SMALL_VALUE_MAX 0x7fffffff 91#define DB_SMALL_VALUE_MIN (-0x400001) 92 93int db_inst_type(int); 94db_addr_t branch_taken(int inst, db_addr_t pc); 95void stacktrace_subr(register_t pc, register_t sp, register_t ra, int (*)(const char *, ...)); 96int32_t kdbpeek(int *); 97int64_t kdbpeekd(int *); 98 99#endif /* !_MIPS_DB_MACHDEP_H_ */ 100