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/*
* 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.
*
* $FreeBSD$
*/
#ifndef _MACHINE_DB_MACHDEP_H_
#define _MACHINE_DB_MACHDEP_H_
#include <machine/frame.h>
#include <machine/psl.h>
#define i386_saved_state trapframe
typedef vm_offset_t db_addr_t; /* address - unsigned */
typedef int db_expr_t; /* expression - signed */
typedef struct i386_saved_state db_regs_t;
extern db_regs_t ddb_regs; /* register state */
#define DDB_REGS (&ddb_regs)
#define PC_REGS(regs) (((regs)->tf_cs & 0xfffc) == 0x08 \
? (db_addr_t)(regs)->tf_eip : 0)
#define BKPT_INST 0xcc /* breakpoint instruction */
#define BKPT_SIZE (1) /* size of breakpoint inst */
#define BKPT_SET(inst) (BKPT_INST)
#define FIXUP_PC_AFTER_BREAK ddb_regs.tf_eip -= 1;
#define db_clear_single_step(regs) ((regs)->tf_eflags &= ~PSL_T)
#define db_set_single_step(regs) ((regs)->tf_eflags |= PSL_T)
#define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT)
/*
* Watchpoints are not supported. The debug exception type is in %dr6
* and not yet in the args to this macro.
*/
#define IS_WATCHPOINT_TRAP(type, code) 0
#define I_CALL 0xe8
#define I_CALLI 0xff
#define I_RET 0xc3
#define I_IRET 0xcf
#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 || \
(((ins)&0xff) == I_CALLI && \
((ins)&0x3800) == 0x1000))
#define inst_load(ins) 0
#define inst_store(ins) 0
/*
* There no interesting addresses below _kstack = 0xefbfe000. There
* are small absolute values for GUPROF, but we don't want to see them.
* Treat "negative" addresses below _kstack as non-small to allow for
* future reductions of _kstack and to avoid sign extension problems.
*
* There is one interesting symbol above -db_maxoff = 0xffff0000,
* namely _APTD = 0xfffff000. Accepting this would mess up the
* printing of small negative offsets. The next largest symbol is
* _APTmap = 0xffc00000. Accepting this is OK (unless db_maxoff is
* set to >= 0x400000 - (max stack offset)).
*/
#define DB_SMALL_VALUE_MAX 0x7fffffff
#define DB_SMALL_VALUE_MIN (-0x400001)
#endif /* !_MACHINE_DB_MACHDEP_H_ */
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