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/* $OpenBSD: db_machdep.h,v 1.5 2001/11/06 00:30:38 art Exp $ */
/* $NetBSD: db_machdep.h,v 1.13 1996/04/29 20:50:08 leo Exp $ */
/*
* Mach Operating System
* Copyright (c) 1992 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.
*/
/*
* Machine-dependent defines for new kernel debugger.
*/
#ifndef _PPC_DB_MACHDEP_H_
#define _PPC_DB_MACHDEP_H_
#include <uvm/uvm_param.h>
#include <machine/trap.h>
/* ELF symbols in ddb */
#define DB_ELF_SYMBOLS
#define DB_ELFSIZE 32
typedef vm_offset_t db_addr_t; /* address - unsigned */
typedef int db_expr_t; /* expression - signed */
struct powerpc_saved_state {
u_int32_t r[32]; /* data registers */
u_int32_t iar;
u_int32_t msr;
};
typedef struct powerpc_saved_state db_regs_t;
db_regs_t ddb_regs; /* register state */
#define DDB_REGS (&ddb_regs)
#define PC_REGS(regs) ((regs)->iar)
#define BKPT_INST 0x7C810808 /* breakpoint instruction */
#define BKPT_SIZE (4) /* size of breakpoint inst */
#define BKPT_SET(inst) (BKPT_INST)
#define FIXUP_PC_AFTER_BREAK(regs) ((regs)->iar -= 4)
#define SR_SINGLESTEP 0x8000
#define db_clear_single_step(regs) ((regs)->msr &= ~SR_SINGLESTEP)
#define db_set_single_step(regs) ((regs)->msr |= SR_SINGLESTEP)
#define T_BREAKPOINT 0xffff
#define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAKPOINT)
#ifdef T_WATCHPOINT
#define IS_WATCHPOINT_TRAP(type, code) ((type) == T_WATCHPOINT)
#else
#define IS_WATCHPOINT_TRAP(type, code) 0
#endif
#define M_RTS 0xfc0007fe
#define I_RTS 0x4c000020
#define M_BC 0xfc000000
#define I_BC 0x40000000
#define M_B 0xfc000000
#define I_B 0x50000000
#define M_RFI 0xfc0007fe
#define I_RFI 0x4c000064
#define inst_trap_return(ins) (((ins)&M_RFI) == I_RFI)
#define inst_return(ins) (((ins)&M_RTS) == I_RTS)
#define inst_call(ins) (((ins)&M_BC ) == I_BC || \
((ins)&M_B ) == I_B )
#define inst_load(ins) 0
#define inst_store(ins) 0
#ifdef _KERNEL
void kdb_kintr __P((void *));
int kdb_trap __P((int, void *));
#endif /* _KERNEL */
#endif /* _PPC_DB_MACHDEP_H_ */
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