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

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2006 Marcel Moolenaar
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
     *
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     *
     * $FreeBSD$
     */
    
    #ifndef _MACHINE_GDB_MACHDEP_H_
    #define _MACHINE_GDB_MACHDEP_H_
    
    #ifdef BOOKE
    #define PPC_GDB_NREGS0  1
    #define PPC_GDB_NREGS4  (70 + 1)
    #define PPC_GDB_NREGS8  (1 + 32)
    #define PPC_GDB_NREGS16 0
    
    #else
    /*
     *   0 - 32*GPR(4/8)
     *  32 - 32*FPR(8)
     *  64 - PC, PS (4/8)
     *  66 - CR (4)
     *  67 - LR, CTR (4/8)
     *  69 - XER, FPSCR (4)
     *  71 - 32*VR(16)
     * 103 - VSCR, VRSAVE (4)
     */
    
    #define PPC_REGNUM_R0   0
    #define PPC_REGNUM_R31  (PPC_REGNUM_R0 + 31)
    #define PPC_REGNUM_FR0  32
    #define PPC_REGNUM_FR31 (PPC_REGNUM_FR0 + 31)
    #define PPC_REGNUM_PC   64
    #define PPC_REGNUM_PS   65
    #define PPC_REGNUM_CR   66
    #define PPC_REGNUM_LR   67
    #define PPC_REGNUM_CTR  68
    #define PPC_REGNUM_XER  69
    #define PPC_REGNUM_FPSCR 70
    #define PPC_REGNUM_VR0  71
    #define PPC_REGNUM_VR31 (PPC_REGNUM_VR0 + 31)
    
    #define PPC_GDB_NREGS0  0
    
    #ifdef __powerpc64__
    #define PPC_GDB_NREGS4  5
    #define PPC_GDB_NREGS8  (64 + 4)
    #else
    #define PPC_GDB_NREGS4  (32 + 7 + 2)
    #define PPC_GDB_NREGS8  32
    #endif
    
    #define PPC_GDB_NREGS16 32
    #endif
    
    #define GDB_NREGS       (PPC_GDB_NREGS0 + PPC_GDB_NREGS4 + \
                             PPC_GDB_NREGS8 + PPC_GDB_NREGS16)
    #define GDB_REG_PC      64
    
    #define GDB_BUFSZ       (PPC_GDB_NREGS4 * 8 +   \
                             PPC_GDB_NREGS8 * 16 +  \
                             PPC_GDB_NREGS16 * 32)
    
    static __inline size_t
    gdb_cpu_regsz(int regnum)
    {
    
    #ifdef BOOKE
            if (regnum == 70)
                    return (0);
            if (regnum == 71 || regnum >= 73)
                    return (8);
    #else
    #ifdef __powerpc64__
            if ((regnum >= PPC_REGNUM_R0 && regnum <= PPC_REGNUM_PS) ||
                regnum == PPC_REGNUM_LR || regnum == PPC_REGNUM_CTR)
                   return (8);
   #else
           if (regnum >= PPC_REGNUM_FR0 && regnum <= PPC_REGNUM_FR31)
                   return (8);
   #endif
           if (regnum >= PPC_REGNUM_VR0 && regnum <= PPC_REGNUM_VR31)
                   return (16);
   #endif
           return (4);
   }
   
   static __inline int
   gdb_cpu_query(void)
   {
   
           return (0);
   }
   
   static __inline void *
   gdb_begin_write(void)
   {
   
           return (NULL);
   }
   
   static __inline void
   gdb_end_write(void *arg __unused)
   {
   
   }
   
   static __inline void
   gdb_cpu_stop_reason(int type __unused, int code __unused)
   {
   
   }
   
   void *gdb_cpu_getreg(int, size_t *);
   void gdb_cpu_setreg(int, void *);
   int gdb_cpu_signal(int, int);
   void gdb_cpu_do_offsets(void);
   
   #endif /* !_MACHINE_GDB_MACHDEP_H_ */

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