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/* $OpenBSD: db_machdep.h,v 1.13 2005/01/06 20:34:07 mickey Exp $ */
/*
* Copyright (c) 1998-2004 Michael Shalayeff
* 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.
*
* 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 OR HIS RELATIVES 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 MIND, 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 _MACHINE_DB_MACHDEP_H_
#define _MACHINE_DB_MACHDEP_H_
#include <uvm/uvm_extern.h>
#define DB_AOUT_SYMBOLS
#define DB_ELF_SYMBOLS
#define DB_ELFSIZE 32
/* types the generic ddb module needs */
typedef vaddr_t db_addr_t;
typedef long db_expr_t;
typedef struct trapframe db_regs_t;
extern db_regs_t ddb_regs;
#define DDB_REGS (&ddb_regs)
#define PC_REGS(regs) ((db_addr_t)(regs)->tf_iioq_head)
/* Breakpoint related definitions */
#define BKPT_INST 0x00010000 /* break 0,8 */
#define BKPT_SIZE sizeof(int)
#define BKPT_SET(inst) BKPT_INST
#define IS_BREAKPOINT_TRAP(type, code) ((type) == T_IBREAK)
#define IS_WATCHPOINT_TRAP(type, code) ((type) == T_DBREAK)
#define FIXUP_PC_AFTER_BREAK(regs) ((regs)->tf_iioq_head -= sizeof(int))
#define DB_VALID_BREAKPOINT(addr) db_valid_breakpoint(addr)
static __inline int inst_call(u_int ins) {
return (ins & 0xfc00e000) == 0xe8000000 ||
(ins & 0xfc00e000) == 0xe8004000 ||
(ins & 0xfc000000) == 0xe4000000;
}
static __inline int inst_branch(u_int ins) {
return (ins & 0xf0000000) == 0xe0000000 ||
(ins & 0xf0000000) == 0xc0000000 ||
(ins & 0xf0000000) == 0xa0000000 ||
(ins & 0xf0000000) == 0x80000000;
}
static __inline int inst_load(u_int ins) {
return (ins & 0xf0000000) == 0x40000000 ||
(ins & 0xf4000200) == 0x24000000 ||
(ins & 0xfc000200) == 0x0c000000 ||
(ins & 0xfc001fc0) != 0x0c0011c0;
}
static __inline int inst_store(u_int ins) {
return (ins & 0xf0000000) == 0x60000000 || /* st */
(ins & 0xf4000200) == 0x24000200 || /* fst/cst */
(ins & 0xfc000200) == 0x0c000200 || /* stby */
(ins & 0xfc0003c0) == 0x0c0001c0; /* ldcw */
}
static __inline int inst_return(u_int ins) {
return (ins & 0xfc00e000) == 0xe800c000 ||
(ins & 0xfc000000) == 0xe0000000;
}
static __inline int inst_trap_return(u_int ins) {
return (ins & 0xfc001fc0) == 0x00000ca0;
}
#if 0
#define db_clear_single_step(r) ((r)->tf_flags &= ~(PSL_Z))
#define db_set_single_step(r) ((r)->tf_flags |= (PSL_Z))
#else
#define SOFTWARE_SSTEP 1
#define SOFTWARE_SSTEP_EMUL 1
static __inline db_addr_t
next_instr_address(db_addr_t addr, int b) {
return (addr + 4);
}
#define branch_taken(ins,pc,f,regs) branch_taken1(ins, pc, regs)
static __inline db_addr_t
branch_taken1(int ins, db_addr_t pc, db_regs_t *regs) {
return (pc);
}
#endif
int db_valid_breakpoint(db_addr_t);
int kdb_trap(int, int, db_regs_t *);
#endif /* _MACHINE_DB_MACHDEP_H_ */
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