[dragonfly.git] / sys / cpu / x86_64 / include / db_machdep.h

/*-
 * 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: src/sys/amd64/include/db_machdep.h,v 1.22 2005/01/05 20:17:20 imp Exp $
 */

#ifndef _CPU_DB_MACHDEP_H_
#define	_CPU_DB_MACHDEP_H_

#include <cpu/frame.h>
#include <cpu/trap.h>

#define x86_64_saved_state	trapframe

typedef	vm_offset_t	db_addr_t;	/* address - unsigned */
typedef	long		db_expr_t;	/* expression - signed */

typedef struct x86_64_saved_state db_regs_t;

#ifdef _KERNEL
extern db_regs_t        ddb_regs;       /* register state */
#define DDB_REGS        (&ddb_regs)

extern	db_addr_t	PC_REGS(db_regs_t *regs);
extern	db_addr_t	SP_REGS(db_regs_t *regs);
extern	db_addr_t	BP_REGS(db_regs_t *regs);

#endif

#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_rip -= 1;

#define db_clear_single_step(regs)	((regs)->tf_rflags &= ~PSL_T)
#define db_set_single_step(regs)	((regs)->tf_rflags |=  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 /* !_CPU_DB_MACHDEP_H_ */
Commit	Line	Data
d7f50089 YY	1	/*-
	2	* Mach Operating System
	3	* Copyright (c) 1991,1990 Carnegie Mellon University
	4	* All Rights Reserved.
	5	*
	6	* Permission to use, copy, modify and distribute this software and its
	7	* documentation is hereby granted, provided that both the copyright
	8	* notice and this permission notice appear in all copies of the
	9	* software, derivative works or modified versions, and any portions
	10	* thereof, and that both notices appear in supporting documentation.
	11	*
	12	* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
	13	* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
	14	* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
	15	*
	16	* Carnegie Mellon requests users of this software to return to
	17	*
	18	* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
	19	* School of Computer Science
	20	* Carnegie Mellon University
	21	* Pittsburgh PA 15213-3890
	22	*
	23	* any improvements or extensions that they make and grant Carnegie Mellon
	24	* the rights to redistribute these changes.
	25	*
	26	* $FreeBSD: src/sys/amd64/include/db_machdep.h,v 1.22 2005/01/05 20:17:20 imp Exp $
d7f50089 YY	27	*/
	28
	29	#ifndef _CPU_DB_MACHDEP_H_
	30	#define _CPU_DB_MACHDEP_H_
	31
	32	#include <cpu/frame.h>
	33	#include <cpu/trap.h>
	34
c1543a89	35	#define x86_64_saved_state trapframe
d7f50089 YY	36
	37	typedef vm_offset_t db_addr_t; /* address - unsigned */
	38	typedef long db_expr_t; /* expression - signed */
	39
c1543a89	40	typedef struct x86_64_saved_state db_regs_t;
d7f50089 YY	41
	42	#ifdef _KERNEL
	43	extern db_regs_t ddb_regs; /* register state */
	44	#define DDB_REGS (&ddb_regs)
	45
	46	extern db_addr_t PC_REGS(db_regs_t *regs);
	47	extern db_addr_t SP_REGS(db_regs_t *regs);
	48	extern db_addr_t BP_REGS(db_regs_t *regs);
	49
	50	#endif
	51
	52	#define BKPT_INST 0xcc /* breakpoint instruction */
	53	#define BKPT_SIZE (1) /* size of breakpoint inst */
	54	#define BKPT_SET(inst) (BKPT_INST)
	55
	56	#define FIXUP_PC_AFTER_BREAK ddb_regs.tf_rip -= 1;
	57
	58	#define db_clear_single_step(regs) ((regs)->tf_rflags &= ~PSL_T)
	59	#define db_set_single_step(regs) ((regs)->tf_rflags \|= PSL_T)
	60
	61	#define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT)
	62	/*
	63	* Watchpoints are not supported. The debug exception type is in %dr6
	64	* and not yet in the args to this macro.
	65	*/
	66	#define IS_WATCHPOINT_TRAP(type, code) 0
	67
	68	#define I_CALL 0xe8
	69	#define I_CALLI 0xff
	70	#define I_RET 0xc3
	71	#define I_IRET 0xcf
	72
	73	#define inst_trap_return(ins) (((ins)&0xff) == I_IRET)
	74	#define inst_return(ins) (((ins)&0xff) == I_RET)
	75	#define inst_call(ins) (((ins)&0xff) == I_CALL \|\| \
	76	(((ins)&0xff) == I_CALLI && \
	77	((ins)&0x3800) == 0x1000))
	78	#define inst_load(ins) 0
	79	#define inst_store(ins) 0
	80
	81	/*
	82	* There no interesting addresses below _kstack = 0xefbfe000. There
	83	* are small absolute values for GUPROF, but we don't want to see them.
	84	* Treat "negative" addresses below _kstack as non-small to allow for
	85	* future reductions of _kstack and to avoid sign extension problems.
	86	*
	87	* There is one interesting symbol above -db_maxoff = 0xffff0000,
	88	* namely _APTD = 0xfffff000. Accepting this would mess up the
	89	* printing of small negative offsets. The next largest symbol is
	90	* _APTmap = 0xffc00000. Accepting this is OK (unless db_maxoff is
	91	* set to >= 0x400000 - (max stack offset)).
	92	*/
	93	#define DB_SMALL_VALUE_MAX 0x7fffffff
	94	#define DB_SMALL_VALUE_MIN (-0x400001)
	95
	96	#endif /* !_CPU_DB_MACHDEP_H_ */