NetBSD/sys/arch/mips/include/db_machdep.h

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/* $NetBSD: db_machdep.h,v 1.8 1999/04/10 15:10:56 drochner Exp $ */
1997-07-07 07:57:55 +04:00
/*
* Copyright (c) 1997 Jonathan Stone (hereinafter referred to as the author)
* All rights reserved.
*
* 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 by Jonathan Stone for
* the NetBSD Project.
* 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.
*/
#ifndef _MIPS_DB_MACHDEP_H_
#define _MIPS_DB_MACHDEP_H_
#include <vm/vm_param.h> /* XXX boolean_t */
#include <mips/trap.h> /* T_BREAK */
#include <mips/reg.h> /* register state */
#include <mips/regnum.h> /* symbolic register indices */
#include <mips/proc.h> /* register state */
typedef vaddr_t db_addr_t; /* address - unsigned */
typedef long db_expr_t; /* expression - signed */
typedef struct frame db_regs_t;
db_regs_t ddb_regs; /* register state */
#define DDB_REGS (&ddb_regs)
#define PC_REGS(regs) ((db_addr_t)(regs)->f_regs[PC])
#define PC_ADVANCE(regs) do { \
if ((db_get_value((regs)->f_regs[PC], sizeof(int), FALSE) & \
0xfc00003f) == 0xd) \
(regs)->f_regs[PC] += BKPT_SIZE; \
} while(0) /* XXX endianness? */
#define BKPT_INST 0x0001000D /* XXX endianness? */
#define BKPT_SIZE (4) /* size of breakpoint inst */
#define BKPT_SET(inst) (BKPT_INST)
#define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAK)
#define IS_WATCHPOINT_TRAP(type, code) (0) /* XXX mips3 watchpoint */
#define inst_trap_return(ins) ((ins)&0)
#define inst_return(ins) ((ins)&0)
#define inst_load(ins) 0
#define inst_store(ins) 0
/*
* Interface to disassembly (shared with mdb)
*/
db_addr_t db_disasm_insn __P((int insn, db_addr_t loc, boolean_t altfmt));
/*
* Entrypoints to DDB for kernel, keyboard drivers, init hook
*/
void kdb_kbd_trap __P((db_regs_t *));
int kdb_trap __P((int type, mips_reg_t *));
void db_machine_init __P((void));
/*
* MIPS cpus have no hardware single-step.
*/
#define SOFTWARE_SSTEP
boolean_t inst_branch __P((int inst));
boolean_t inst_call __P((int inst));
boolean_t inst_unconditional_flow_transfer __P((int inst));
db_addr_t branch_taken __P((int inst, db_addr_t pc, db_regs_t *regs));
db_addr_t next_instr_address __P((db_addr_t pc, boolean_t bd));
/*
* We have machine-dependent commands.
*/
#define DB_MACHINE_COMMANDS
#endif /* _MIPS_DB_MACHDEP_H_ */