sys/arch/m68k/include/db_machdep.h

   1 /*      $NetBSD: db_machdep.h,v 1.26 2005/12/11 12:17:53 christos Exp $ */
   2
   3 /*
   4  * Mach Operating System
   5  * Copyright (c) 1992 Carnegie Mellon University
   6  * All Rights Reserved.
   7  *
   8  * Permission to use, copy, modify and distribute this software and its
   9  * documentation is hereby granted, provided that both the copyright
  10  * notice and this permission notice appear in all copies of the
  11  * software, derivative works or modified versions, and any portions
  12  * thereof, and that both notices appear in supporting documentation.
  13  *
  14  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  15  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  16  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  17  *
  18  * Carnegie Mellon requests users of this software to return to
  19  *
  20  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  21  *  School of Computer Science
  22  *  Carnegie Mellon University
  23  *  Pittsburgh PA 15213-3890
  24  *
  25  * any improvements or extensions that they make and grant Carnegie Mellon
  26  * the rights to redistribute these changes.
  27  */
  28
  29 /*
  30  * Machine-dependent defines for new kernel debugger.
  31  */
  32 #ifndef _M68K_DB_MACHDEP_H_
  33 #define _M68K_DB_MACHDEP_H_
  34
  35 #include <sys/types.h>
  36
  37 /*
  38  * XXX - Would rather not pull in vm headers, but need boolean_t,
  39  * at least until boolean_t moves to <sys/types.h> or someplace.
  40  */
  41 #include <uvm/uvm_param.h>
  42
  43 #include <machine/frame.h>
  44 #include <machine/psl.h>
  45 #include <machine/trap.h>
  46
  47 typedef vaddr_t         db_addr_t;      /* address - unsigned */
  48 typedef long            db_expr_t;      /* expression - signed */
  49 typedef struct trapframe db_regs_t;
  50
  51 extern db_regs_t        ddb_regs;       /* register state */
  52 #define DDB_REGS        (&ddb_regs)
  53
  54 #define PC_REGS(regs)   ((regs)->tf_pc)
  55
  56 #define BKPT_ADDR(addr) (addr)          /* breakpoint address */
  57 #define BKPT_INST       0x4e4f          /* breakpoint instruction */
  58 #define BKPT_SIZE       (2)             /* size of breakpoint inst */
  59 #define BKPT_SET(inst, addr)    (BKPT_INST)
  60
  61 #define FIXUP_PC_AFTER_BREAK(regs)      ((regs)->tf_pc -= BKPT_SIZE)
  62
  63 #define db_clear_single_step(regs)      ((regs)->tf_sr &= ~PSL_T)
  64 #define db_set_single_step(regs)        ((regs)->tf_sr |=  PSL_T)
  65
  66 #define IS_BREAKPOINT_TRAP(type, code)  ((type) == T_BREAKPOINT)
  67 #ifdef T_WATCHPOINT
  68 #define IS_WATCHPOINT_TRAP(type, code)  ((type) == T_WATCHPOINT)
  69 #else
  70 #define IS_WATCHPOINT_TRAP(type, code)  0
  71 #endif
  72
  73 #define M_RTS           0xffff0000
  74 #define I_RTS           0x4e750000
  75 #define M_JSR           0xffc00000
  76 #define I_JSR           0x4e800000
  77 #define M_BSR           0xff000000
  78 #define I_BSR           0x61000000
  79 #define M_RTE           0xffff0000
  80 #define I_RTE           0x4e730000
  81
  82 #define inst_trap_return(ins)   (((ins)&M_RTE) == I_RTE)
  83 #define inst_return(ins)        (((ins)&M_RTS) == I_RTS)
  84 #define inst_call(ins)          (((ins)&M_JSR) == I_JSR || \
  85                                  ((ins)&M_BSR) == I_BSR)
  86 #define inst_load(ins)          0
  87 #define inst_store(ins)         0
  88
  89 /*
  90  * Things needed by kgdb:
  91  */
  92 typedef long kgdb_reg_t;
  93 #define KGDB_NUMREGS    (16+2)
  94 #define KGDB_BUFLEN     512
  95
  96
  97 #ifdef _KERNEL
  98
  99 void    Debugger(void);         /* XXX */
 100 void    kdb_kintr(db_regs_t *);
 101 int     kdb_trap(int, db_regs_t *);
 102
 103 #endif /* _KERNEL */
 104
 105 /*
 106  * We use either a.out or Elf32 symbols in DDB.
 107  */
 108 #define DB_AOUT_SYMBOLS
 109 #define DB_ELF_SYMBOLS
 110 #define DB_ELFSIZE      32
 111
 112 #endif  /* _M68K_DB_MACHDEP_H_ */