sys/powerpc/include/db_machdep.h

   1 /*-
   2  * Mach Operating System
   3  * Copyright (c) 1992 Carnegie Mellon University
   4  * All Rights Reserved.
   5  *
   6  * Permission to use, copy, modify and distribute this software and its
   7  * documentation is hereby granted, provided that both the copyright
   8  * notice and this permission notice appear in all copies of the
   9  * software, derivative works or modified versions, and any portions
  10  * thereof, and that both notices appear in supporting documentation.
  11  *
  12  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  13  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  14  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  15  *
  16  * Carnegie Mellon requests users of this software to return to
  17  *
  18  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  19  *  School of Computer Science
  20  *  Carnegie Mellon University
  21  *  Pittsburgh PA 15213-3890
  22  *
  23  * any improvements or extensions that they make and grant Carnegie Mellon
  24  * the rights to redistribute these changes.
  25  *
  26  *      $OpenBSD: db_machdep.h,v 1.2 1997/03/21 00:48:48 niklas Exp $
  27  *      $NetBSD: db_machdep.h,v 1.4.22.1 2000/08/05 11:10:43 wiz Exp $
  28  */
  29
  30 /*
  31  * Machine-dependent defines for new kernel debugger.
  32  */
  33 #ifndef _POWERPC_DB_MACHDEP_H_
  34 #define _POWERPC_DB_MACHDEP_H_
  35
  36 #include <vm/vm_param.h>
  37 #include <machine/elf.h>
  38
  39 #define DB_ELF_SYMBOLS
  40 #define DB_ELFSIZE      __ELF_WORD_SIZE
  41
  42 typedef vm_offset_t     db_addr_t;      /* address - unsigned */
  43 typedef intptr_t        db_expr_t;      /* expression - signed */
  44
  45 #define PC_REGS(regs)   ((db_addr_t)kdb_thrctx->pcb_lr)
  46
  47 #define BKPT_INST       0x7C810808      /* breakpoint instruction */
  48
  49 #define BKPT_SIZE       (4)             /* size of breakpoint inst */
  50 #define BKPT_SET(inst)  (BKPT_INST)
  51
  52 #define db_clear_single_step    kdb_cpu_clear_singlestep
  53 #define db_set_single_step      kdb_cpu_set_singlestep
  54
  55 #if 0
  56 #define SR_SINGLESTEP   0x400
  57 #define db_clear_single_step(regs)      ((regs)->msr &= ~SR_SINGLESTEP)
  58 #define db_set_single_step(regs)        ((regs)->msr |=  SR_SINGLESTEP)
  59 #endif
  60
  61 #define T_BREAKPOINT    0xffff
  62 #define IS_BREAKPOINT_TRAP(type, code)  ((type) == T_BREAKPOINT)
  63
  64 #define T_WATCHPOINT    0xeeee
  65 #ifdef T_WATCHPOINT
  66 #define IS_WATCHPOINT_TRAP(type, code)  ((type) == T_WATCHPOINT)
  67 #else
  68 #define IS_WATCHPOINT_TRAP(type, code)  0
  69 #endif
  70
  71 #define M_RTS           0xfc0007fe
  72 #define I_RTS           0x4c000020
  73 #define M_BC            0xfc000000
  74 #define I_BC            0x40000000
  75 #define M_B             0xfc000000
  76 #define I_B             0x50000000
  77 #define M_RFI           0xfc0007fe
  78 #define I_RFI           0x4c000064
  79
  80 #define inst_trap_return(ins)   (((ins)&M_RFI) == I_RFI)
  81 #define inst_return(ins)        (((ins)&M_RTS) == I_RTS)
  82 #define inst_call(ins)          (((ins)&M_BC ) == I_BC  || \
  83                                  ((ins)&M_B  ) == I_B )
  84 #define inst_load(ins)          0
  85 #define inst_store(ins)         0
  86
  87 #endif  /* _POWERPC_DB_MACHDEP_H_ */