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db_machdep.h revision 1.2 
      1 /*	$OpenBSD: db_machdep.h,v 1.2 1997/03/21 00:48:48 niklas Exp $	*/
      2 /*	$NetBSD: db_machdep.h,v 1.2 1998/02/23 03:22:16 mycroft Exp $	*/
      3 
      4 /*
      5  * Mach Operating System
      6  * Copyright (c) 1992 Carnegie Mellon University
      7  * All Rights Reserved.
      8  *
      9  * Permission to use, copy, modify and distribute this software and its
     10  * documentation is hereby granted, provided that both the copyright
     11  * notice and this permission notice appear in all copies of the
     12  * software, derivative works or modified versions, and any portions
     13  * thereof, and that both notices appear in supporting documentation.
     14  *
     15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
     17  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     18  *
     19  * Carnegie Mellon requests users of this software to return to
     20  *
     21  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     22  *  School of Computer Science
     23  *  Carnegie Mellon University
     24  *  Pittsburgh PA 15213-3890
     25  *
     26  * any improvements or extensions that they make and grant Carnegie Mellon
     27  * the rights to redistribute these changes.
     28  */
     29 
     30 /*
     31  * Machine-dependent defines for new kernel debugger.
     32  */
     33 #ifndef	_PPC_DB_MACHDEP_H_
     34 #define	_PPC_DB_MACHDEP_H_
     35 
     36 #include <vm/vm_prot.h>
     37 #include <vm/vm_param.h>
     38 #include <vm/vm_inherit.h>
     39 #include <machine/trap.h>
     40 
     41 #define	DB_ELF_SYMBOLS
     42 #define	DB_ELFSIZE	32
     43 
     44 typedef	vm_offset_t	db_addr_t;	/* address - unsigned */
     45 typedef	int		db_expr_t;	/* expression - signed */
     46 struct powerpc_saved_state {
     47 	u_int32_t	r[32];		/* data registers */
     48 	u_int32_t	iar;
     49 	u_int32_t	msr;
     50 };
     51 typedef struct powerpc_saved_state db_regs_t;
     52 db_regs_t	ddb_regs;		/* register state */
     53 #define DDB_REGS	(&ddb_regs)
     54 
     55 #define	PC_REGS(regs)	((db_addr_t)(regs)->iar)
     56 
     57 #define	BKPT_INST	0x7C810808	/* breakpoint instruction */
     58 
     59 #define	BKPT_SIZE	(4)		/* size of breakpoint inst */
     60 #define	BKPT_SET(inst)	(BKPT_INST)
     61 
     62 #define	FIXUP_PC_AFTER_BREAK(regs)	((regs)->iar -= 4)
     63 
     64 #define SR_SINGLESTEP	0x400
     65 #define	db_clear_single_step(regs)	((regs)->msr &= ~SR_SINGLESTEP)
     66 #define	db_set_single_step(regs)	((regs)->msr |=  SR_SINGLESTEP)
     67 
     68 #define T_BREAKPOINT	0xffff
     69 #define	IS_BREAKPOINT_TRAP(type, code)	((type) == T_BREAKPOINT)
     70 
     71 #define T_WATCHPOINT	0xeeee
     72 #ifdef T_WATCHPOINT
     73 #define	IS_WATCHPOINT_TRAP(type, code)	((type) == T_WATCHPOINT)
     74 #else
     75 #define	IS_WATCHPOINT_TRAP(type, code)	0
     76 #endif
     77 
     78 #define	M_RTS		0xfc0007fe
     79 #define I_RTS		0x4c000020
     80 #define M_BC		0xfc000000
     81 #define I_BC		0x40000000
     82 #define M_B		0xfc000000
     83 #define I_B		0x50000000
     84 #define	M_RFI		0xfc0007fe
     85 #define	I_RFI		0x4c000064
     86 
     87 #define	inst_trap_return(ins)	(((ins)&M_RFI) == I_RFI)
     88 #define	inst_return(ins)	(((ins)&M_RTS) == I_RTS)
     89 #define	inst_call(ins)		(((ins)&M_BC ) == I_BC  || \
     90 				 ((ins)&M_B  ) == I_B )
     91 #define inst_load(ins)		0
     92 #define inst_store(ins)		0
     93 
     94 #ifdef _KERNEL
     95 
     96 void	kdb_kintr __P((void *));
     97 int	kdb_trap __P((int, void *));
     98 
     99 #endif /* _KERNEL */
    100 
    101 #endif	/* _PPC_DB_MACHDEP_H_ */
    102