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/* $OpenBSD: db_machdep.h,v 1.6 2016/04/27 11:10:48 mpi Exp $ */
/*
* Copyright (c) 1998-2005 Michael Shalayeff
* All rights reserved.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER IN
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _MACHINE_DB_MACHDEP_H_
#define _MACHINE_DB_MACHDEP_H_
#include <uvm/uvm_extern.h>
/* 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 PC_REGS(regs) ((db_addr_t)(regs)->tf_iioq[0])
#define SET_PC_REGS(r,pc) ((r)->tf_iioq[0] = (pc), (r)->tf_iioq[1] = (pc) + 4)
/* 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[0] -= sizeof(int))
#define DB_VALID_BREAKPOINT(addr) db_valid_breakpoint(addr)
/* TODO 64bit insns */
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_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 db_ktrap(int, int, db_regs_t *);
#endif /* _MACHINE_DB_MACHDEP_H_ */
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