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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/powerpc/include/db_machdep.h
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/*-

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 * Mach Operating System

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 * Copyright (c) 1992 Carnegie Mellon University

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 * All Rights Reserved.

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 *

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 * Permission to use, copy, modify and distribute this software and its

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 * documentation is hereby granted, provided that both the copyright

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 * notice and this permission notice appear in all copies of the

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 * software, derivative works or modified versions, and any portions

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 * thereof, and that both notices appear in supporting documentation.

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 *

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 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"

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 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR

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 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.

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 *

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 * Carnegie Mellon requests users of this software to return to

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 *

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 *  Software Distribution Coordinator  or  [email protected]

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 *  School of Computer Science

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 *  Carnegie Mellon University

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 *  Pittsburgh PA 15213-3890

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 *

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 * any improvements or extensions that they make and grant Carnegie Mellon

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 * the rights to redistribute these changes.

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 *

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 *	$OpenBSD: db_machdep.h,v 1.2 1997/03/21 00:48:48 niklas Exp $

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 *	$NetBSD: db_machdep.h,v 1.4.22.1 2000/08/05 11:10:43 wiz Exp $

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 */

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/*

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 * Machine-dependent defines for new kernel debugger.

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 */

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#ifndef _POWERPC_DB_MACHDEP_H_

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#define	_POWERPC_DB_MACHDEP_H_

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#include <vm/vm_param.h>

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#include <machine/elf.h>

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#define	DB_ELF_SYMBOLS

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#define	DB_ELFSIZE	__ELF_WORD_SIZE

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typedef	vm_offset_t	db_addr_t;	/* address - unsigned */

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typedef	intptr_t	db_expr_t;	/* expression - signed */

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#define	PC_REGS(regs)	((db_addr_t)kdb_thrctx->pcb_lr)

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#define	BKPT_INST	0x7C810808	/* breakpoint instruction */

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#define	BKPT_SIZE	(4)		/* size of breakpoint inst */

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#define	BKPT_SET(inst)	(BKPT_INST)

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#define db_clear_single_step	kdb_cpu_clear_singlestep

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#define db_set_single_step	kdb_cpu_set_singlestep

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#if 0

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#define	SR_SINGLESTEP	0x400

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#define	db_clear_single_step(regs)	((regs)->msr &= ~SR_SINGLESTEP)

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#define	db_set_single_step(regs)	((regs)->msr |=  SR_SINGLESTEP)

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#endif

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#define	T_BREAKPOINT	0xffff

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#define	IS_BREAKPOINT_TRAP(type, code)	((type) == T_BREAKPOINT)

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#define T_WATCHPOINT	0xeeee

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#ifdef T_WATCHPOINT

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#define	IS_WATCHPOINT_TRAP(type, code)	((type) == T_WATCHPOINT)

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#else

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#define	IS_WATCHPOINT_TRAP(type, code)	0

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#endif

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#define	M_RTS		0xfc0007fe

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#define	I_RTS		0x4c000020

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#define	M_BC		0xfc000000

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#define	I_BC		0x40000000

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#define	M_B		0xfc000000

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#define	I_B		0x50000000

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#define	M_RFI		0xfc0007fe

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#define	I_RFI		0x4c000064

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#define	inst_trap_return(ins)	(((ins)&M_RFI) == I_RFI)

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#define	inst_return(ins)	(((ins)&M_RTS) == I_RTS)

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#define	inst_call(ins)		(((ins)&M_BC ) == I_BC  || \

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				 ((ins)&M_B  ) == I_B )

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#define	inst_load(ins)		0

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#define	inst_store(ins)		0

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#endif	/* _POWERPC_DB_MACHDEP_H_ */

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