/*-
* Mach Operating System
* Copyright (c) 1991,1990 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
#ifndef _MACHINE_DB_MACHDEP_H_
#define _MACHINE_DB_MACHDEP_H_
#include <machine/frame.h>
#include <machine/trap.h>
typedef vm_offset_t db_addr_t; /* address - unsigned */
typedef long db_expr_t; /* expression - signed */
#define PC_REGS() ((db_addr_t)kdb_thrctx->pcb_rip)
#define BKPT_INST 0xcc /* breakpoint instruction */
#define BKPT_SIZE (1) /* size of breakpoint inst */
#define BKPT_SET(inst) (BKPT_INST)
#define BKPT_SKIP \
do { \
kdb_frame->tf_rip += 1; \
kdb_thrctx->pcb_rip += 1; \
} while(0)
#define FIXUP_PC_AFTER_BREAK \
do { \
kdb_frame->tf_rip -= 1; \
kdb_thrctx->pcb_rip -= 1; \
} while(0);
#define db_clear_single_step kdb_cpu_clear_singlestep
#define db_set_single_step kdb_cpu_set_singlestep
/*
* The debug exception type is copied from %dr6 to 'code' and used to
* disambiguate single step traps. Watchpoints have no special support.
* Our hardware breakpoints are not well integrated with ddb and are too
* different from watchpoints. ddb treats them as unknown traps with
* unknown addresses and doesn't turn them off while it is running.
*/
#define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT)
#define IS_SSTEP_TRAP(type, code) \
((type) == T_TRCTRAP && (code) & DBREG_DR6_BS)
#define IS_WATCHPOINT_TRAP(type, code) 0
#define I_CALL 0xe8
#define I_CALLI 0xff
#define i_calli(ins) (((ins)&0xff) == I_CALLI && ((ins)&0x3800) == 0x1000)
#define I_RET 0xc3
#define I_IRET 0xcf
#define i_rex(ins) (((ins) & 0xff) == 0x41 || ((ins) & 0xff) == 0x43)
#define inst_trap_return(ins) (((ins)&0xff) == I_IRET)
#define inst_return(ins) (((ins)&0xff) == I_RET)
#define inst_call(ins) (((ins)&0xff) == I_CALL || i_calli(ins) || \
(i_calli((ins) >> 8) && i_rex(ins)))
#define inst_load(ins) 0
#define inst_store(ins) 0
#endif /* !_MACHINE_DB_MACHDEP_H_ */
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