text: /*	$OpenBSD: db_machdep.h,v 1.4 2001/08/22 05:08:11 jason Exp $	*/
  /*	$NetBSD: db_machdep.h,v 1.12 2001/07/07 15:16:13 eeh Exp $ */
  
  /*
   * 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.
   */
  
  #ifndef	_SPARC_DB_MACHDEP_H_
  #define	_SPARC_DB_MACHDEP_H_
  
  /*
   * Machine-dependent defines for new kernel debugger.
   */
  
  #include <vm/vm.h>
  #include <uvm/uvm_extern.h>
  
  #include <machine/frame.h>
  #include <machine/psl.h>
  #include <machine/trap.h>
  #include <machine/reg.h>
  
  /* end of mangling */
  
  typedef	vaddr_t		db_addr_t;	/* address - unsigned */
  typedef	long		db_expr_t;	/* expression - signed */
  
  struct trapstate {
  	int64_t tstate;
  	int64_t tpc;
  	int64_t	tnpc;
  	int64_t	tt;
  };
  #if 1
  typedef struct {
  	struct trapframe64	ddb_tf;
  	struct frame64		ddb_fr;
  	struct trapstate	ddb_ts[5];
  	int			ddb_tl;
  	struct fpstate64	ddb_fpstate;
  } db_regs_t;
  #else
  typedef struct db_regs {
  	struct trapregs dbr_traps[4];
  	int		dbr_y;
  	char		dbr_tl;
  	char		dbr_canrestore;
  	char		dbr_cansave;
  	char		dbr_cleanwin;
  	char		dbr_cwp;
  	char		dbr_wstate;
  	int64_t		dbr_g[8];
  	int64_t		dbr_ag[8];
  	int64_t		dbr_ig[8];
  	int64_t		dbr_mg[8];
  	int64_t		dbr_out[8];
  	int64_t		dbr_local[8];
  	int64_t		dbr_in[8];
  } db_regs_t;
  #endif
  
  db_regs_t		ddb_regs;	/* register state */
  #define	DDB_REGS	(&ddb_regs)
  #define	DDB_TF		(&ddb_regs.ddb_tf)
  #define	DDB_FR		(&ddb_regs.ddb_fr)
  #define	DDB_FP		(&ddb_regs.ddb_fpstate)
  
  #if defined(lint)
  #define	PC_REGS(regs)	((regs)->ddb_tf.tf_pc)
  #else
  #define	PC_REGS(regs)	((db_addr_t)(regs)->ddb_tf.tf_pc)
  #endif
  #define	PC_ADVANCE(regs) do {				\
  	vaddr_t n = (regs)->ddb_tf.tf_npc;		\
  	(regs)->ddb_tf.tf_pc = n;			\
  	(regs)->ddb_tf.tf_npc = n + 4;			\
  } while(0)
  
  #define	BKPT_INST	0x91d02001	/* breakpoint instruction */
  #define	BKPT_SIZE	(4)		/* size of breakpoint inst */
  #define	BKPT_SET(inst)	(BKPT_INST)
  
  #define	IS_BREAKPOINT_TRAP(type, code)	\
  	((type) == T_BREAKPOINT || (type) == T_KGDB_EXEC)
  #define IS_WATCHPOINT_TRAP(type, code)	\
  	((type) ==T_PA_WATCHPT || (type) == T_VA_WATCHPT)
  
  /*
   * Sparc cpus have no hardware single-step.
   */
  #define SOFTWARE_SSTEP
  
  boolean_t	db_inst_trap_return __P((int inst));
  boolean_t	db_inst_return __P((int inst));
  boolean_t	db_inst_call __P((int inst));
  boolean_t	db_inst_branch __P((int inst));
  int		db_inst_load __P((int inst));
  int		db_inst_store __P((int inst));
  boolean_t	db_inst_unconditional_flow_transfer __P((int inst));
  db_addr_t	db_branch_taken __P((int inst, db_addr_t pc, db_regs_t *regs));
  void		db_machine_init __P((void));
  
  #define inst_trap_return(ins)	db_inst_trap_return(ins)
  #define inst_return(ins)	db_inst_return(ins)
  #define inst_call(ins)		db_inst_call(ins)
  #define inst_branch(ins)	db_inst_branch(ins)
  #define inst_load(ins)		db_inst_load(ins)
  #define inst_store(ins)		db_inst_store(ins)
  #define	inst_unconditional_flow_transfer(ins) \
  				db_inst_unconditional_flow_transfer(ins)
  #define branch_taken(ins, pc, fun, regs) \
  				db_branch_taken((ins), (pc), (regs))
  
  /* see note in db_interface.c about reversed breakpoint addrs */
  #define next_instr_address(pc, bd) \
  	((bd) ? (pc) : ddb_regs.ddb_tf.tf_npc)
  
  #define DB_MACHINE_COMMANDS
  
  void db_machine_init __P((void));
  int kdb_trap __P((int, struct trapframe64 *));
  
  /*
   * We will use elf symbols in DDB when they work.
   */
  #if 1
  #define	DB_ELF_SYMBOLS
  #ifdef __arch64__
  #define DB_ELFSIZE	64
  #else
  #define DB_ELFSIZE	32
  #endif
  #else
  #define DB_AOUT_SYMBOLS
  #endif
  /*
   * KGDB definitions
   */
  typedef u_long		kgdb_reg_t;
  #define KGDB_NUMREGS	72
  #define KGDB_BUFLEN	1024
  
  #endif	/* _SPARC_DB_MACHDEP_H_ */
  