FreeBSD/Linux Kernel Cross Reference
sys/powerpc/include/db_machdep.h

     /*-
      * Mach Operating System
      * Copyright (c) 1992 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.
     *
     *      $OpenBSD: db_machdep.h,v 1.2 1997/03/21 00:48:48 niklas Exp $
     *      $NetBSD: db_machdep.h,v 1.4.22.1 2000/08/05 11:10:43 wiz Exp $
     * $FreeBSD$
     */
    
    /*
     * Machine-dependent defines for new kernel debugger.
     */
    #ifndef _POWERPC_DB_MACHDEP_H_
    #define _POWERPC_DB_MACHDEP_H_
    
    #include <vm/vm_param.h>
    #include <machine/elf.h>
    
    #define DB_ELF_SYMBOLS
    #define DB_ELFSIZE      __ELF_WORD_SIZE
    
    typedef vm_offset_t     db_addr_t;      /* address - unsigned */
    typedef intptr_t        db_expr_t;      /* expression - signed */
    
    #define PC_REGS(regs)   ((db_addr_t)kdb_thrctx->pcb_lr)
    
    #define BKPT_INST       0x7C810808      /* breakpoint instruction */
    
    #define BKPT_SIZE       (4)             /* size of breakpoint inst */
    #define BKPT_SET(inst)  (BKPT_INST)
    
    #define db_clear_single_step    kdb_cpu_clear_singlestep
    #define db_set_single_step      kdb_cpu_set_singlestep
    
    #if 0
    #define SR_SINGLESTEP   0x400
    #define db_clear_single_step(regs)      ((regs)->msr &= ~SR_SINGLESTEP)
    #define db_set_single_step(regs)        ((regs)->msr |=  SR_SINGLESTEP)
    #endif
    
    #define T_BREAKPOINT    0xffff
    #define IS_BREAKPOINT_TRAP(type, code)  ((type) == T_BREAKPOINT)
    
    #define T_WATCHPOINT    0xeeee
    #ifdef T_WATCHPOINT
    #define IS_WATCHPOINT_TRAP(type, code)  ((type) == T_WATCHPOINT)
    #else
    #define IS_WATCHPOINT_TRAP(type, code)  0
    #endif
    
    #define M_RTS           0xfc0007fe
    #define I_RTS           0x4c000020
    #define M_BC            0xfc000000
    #define I_BC            0x40000000
    #define M_B             0xfc000000
    #define I_B             0x50000000
    #define M_RFI           0xfc0007fe
    #define I_RFI           0x4c000064
    
    #define inst_trap_return(ins)   (((ins)&M_RFI) == I_RFI)
    #define inst_return(ins)        (((ins)&M_RTS) == I_RTS)
    #define inst_call(ins)          (((ins)&M_BC ) == I_BC  || \
                                     ((ins)&M_B  ) == I_B )
    #define inst_load(ins)          0
    #define inst_store(ins)         0
    
    #endif  /* _POWERPC_DB_MACHDEP_H_ */

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