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/* $OpenBSD: db_machdep.h,v 1.2 1998/09/15 10:50:12 pefo Exp $ */
/*
* Copyright (c) 1998 Per Fogelstrom, Opsycon AB
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed under OpenBSD by
* Per Fogelstrom, Opsycon AB, Sweden.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* JNPR: db_machdep.h,v 1.7 2006/10/16 12:30:34 katta
* $FreeBSD: release/9.1.0/sys/mips/include/db_machdep.h 210041 2010-07-14 00:52:29Z imp $
*/
#ifndef _MIPS_DB_MACHDEP_H_
#define _MIPS_DB_MACHDEP_H_
#include <machine/frame.h>
#include <machine/trap.h>
#include <machine/endian.h>
typedef struct trapframe db_regs_t;
extern db_regs_t ddb_regs; /* register state */
typedef vm_offset_t db_addr_t; /* address - unsigned */
typedef register_t db_expr_t; /* expression - signed */
#if BYTE_ORDER == _BIG_ENDIAN
#define BYTE_MSF (1)
#endif
#define SOFTWARE_SSTEP /* Need software single step */
#define SOFTWARE_SSTEP_EMUL /* next_instr_address() emulates 100% */
db_addr_t next_instr_address(db_addr_t, boolean_t);
#define BKPT_SIZE (4)
#define BKPT_SET(ins) (MIPS_BREAK_DDB)
#define DB_VALID_BREAKPOINT(addr) (((addr) & 3) == 0)
#define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAK)
#define IS_WATCHPOINT_TRAP(type, code) (0) /* XXX mips3 watchpoint */
#define PC_REGS() ((db_addr_t)kdb_thrctx->pcb_regs.pc)
#define BKPT_SKIP \
do { \
if((db_get_value(kdb_frame->pc, sizeof(int), FALSE) & \
~MIPS_BREAK_VAL_MASK) == MIPS_BREAK_INSTR) { \
kdb_frame->pc += BKPT_SIZE; \
kdb_thrctx->pcb_regs.pc += BKPT_SIZE; \
} \
} while (0);
/*
* Test of instructions to see class.
*/
#define IT_CALL 0x01
#define IT_BRANCH 0x02
#define IT_LOAD 0x03
#define IT_STORE 0x04
#define inst_branch(i) (db_inst_type(i) == IT_BRANCH)
#define inst_trap_return(i) ((i) & 0)
#define inst_call(i) (db_inst_type(i) == IT_CALL)
#define inst_return(i) ((i) == 0x03e00008)
#define inst_load(i) (db_inst_type(i) == IT_LOAD)
#define inst_store(i) (db_inst_type(i) == IT_STORE)
#define DB_SMALL_VALUE_MAX 0x7fffffff
#define DB_SMALL_VALUE_MIN (-0x400001)
int db_inst_type(int);
db_addr_t branch_taken(int inst, db_addr_t pc);
void stacktrace_subr(register_t pc, register_t sp, register_t ra, int (*)(const char *, ...));
int kdbpeek(int *);
#endif /* !_MIPS_DB_MACHDEP_H_ */