sys/arch/vax/include/db_machdep.h

   1 /*      $NetBSD: db_machdep.h,v 1.15 2008/03/11 05:34:02 matt Exp $     */
   2
   3 /*
   4  * Mach Operating System
   5  * Copyright (c) 1991,1990 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 #ifndef _VAX_DB_MACHDEP_H_
  30 #define _VAX_DB_MACHDEP_H_
  31
  32 /*
  33  * Machine-dependent defines for new kernel debugger.
  34  * Modified for vax out of i386 code.
  35  */
  36
  37 #include <sys/param.h>
  38 #include <uvm/uvm_extern.h>
  39 #include <machine/trap.h>
  40 #include <machine/psl.h>
  41
  42 typedef vaddr_t         db_addr_t;      /* address - unsigned */
  43 typedef long            db_expr_t;      /* expression - signed */
  44
  45 typedef struct trapframe db_regs_t;
  46 extern  db_regs_t       ddb_regs;       /* register state */
  47 #define DDB_REGS        (&ddb_regs)
  48
  49 #define PC_REGS(regs)   (*(db_addr_t *)&(regs)->pc)
  50
  51 #define BKPT_ADDR(addr) (addr)          /* breakpoint address */
  52 #define BKPT_INST       0x03            /* breakpoint instruction */
  53 #define BKPT_SIZE       (1)             /* size of breakpoint inst */
  54 #define BKPT_SET(inst, addr)    (BKPT_INST)
  55
  56 #define FIXUP_PC_AFTER_BREAK(regs)      ((regs)->pc -= BKPT_SIZE)
  57
  58 #define db_clear_single_step(regs)      ((regs)->psl &= ~PSL_T)
  59 #define db_set_single_step(regs)        ((regs)->psl |=  PSL_T)
  60
  61 #define IS_BREAKPOINT_TRAP(type, code)  ((type) == T_BPTFLT)
  62 #define IS_WATCHPOINT_TRAP(type, code)  ((type) == T_TRCTRAP)
  63
  64 #define I_CALL          0xfb
  65 #define I_RET           0x04
  66 #define I_IRET          0x02
  67
  68 #define inst_trap_return(ins)   (((ins)&0xff) == I_IRET)
  69 #define inst_return(ins)        (((ins)&0xff) == I_RET)
  70 #define inst_call(ins)          (((ins)&0xff) == I_CALL)
  71
  72 #define inst_load(ins)          0
  73 #define inst_store(ins)         0
  74
  75 #define DB_MACHINE_COMMANDS
  76
  77 /* Prototypes */
  78 void    kdb_trap(struct trapframe *);
  79
  80 /*
  81  * We use a.out symbols in DDB (unless we are ELF then we use ELF symbols).
  82  */
  83 #define DB_ELF_SYMBOLS
  84 #define DB_ELFSIZE              32
  85
  86 #endif  /* _VAX_DB_MACHDEP_H_ */