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/* sparc-dependent portions of the RPC protocol

   used with a VxWorks target

   Contributed by Wind River Systems.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 2 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program; if not, write to the Free Software

   Foundation, Inc., 59 Temple Place - Suite 330,

   Boston, MA 02111-1307, USA.  */

#include <stdio.h>

#include "defs.h"

#include "vx-share/regPacket.h"

#include "frame.h"

#include "inferior.h"

#include "target.h"

#include "gdbcore.h"

#include "command.h"

#include "symtab.h"

#include "symfile.h"            /* for struct complaint */

#include "regcache.h"

#include "gdb_string.h"

#include <errno.h>

#include <fcntl.h>

#include <sys/types.h>

#include <sys/time.h>

#include <sys/socket.h>

#ifdef _AIX                     /* IBM claims "void *malloc()" not char * */

#define malloc bogon_malloc

#endif

#include <rpc/rpc.h>

#include <sys/time.h>           /* UTek's <rpc/rpc.h> doesn't #incl this */

#include <netdb.h>

#include "vx-share/ptrace.h"

#include "vx-share/xdr_ptrace.h"

#include "vx-share/xdr_ld.h"

#include "vx-share/xdr_rdb.h"

#include "vx-share/dbgRpcLib.h"

/* get rid of value.h if possible */

#include <value.h>

#include <symtab.h>

/* Flag set if target has fpu */

extern int target_has_fp;

/* sparc floating point format descriptor, from "sparc-tdep.c."  */

extern struct ext_format ext_format_sparc;

/* Generic register read/write routines in remote-vx.c.  */

extern void net_read_registers ();

extern void net_write_registers ();

/* Read a register or registers from the VxWorks target.

   REGNO is the register to read, or -1 for all; currently,

   it is ignored.  FIXME look at regno to improve efficiency.  */

void

vx_read_register (int regno)

{

  char sparc_greg_packet[SPARC_GREG_PLEN];

  char sparc_fpreg_packet[SPARC_FPREG_PLEN];

  CORE_ADDR sp;

  /* Get general-purpose registers.  When copying values into

     registers [], don't assume that a location in registers []

     is properly aligned for the target data type.  */

  net_read_registers (sparc_greg_packet, SPARC_GREG_PLEN, PTRACE_GETREGS);

  /* Now copy the register values into registers[].

     Note that this code depends on the ordering of the REGNUMs

     as defined in "tm-sparc.h".  */

  bcopy (&sparc_greg_packet[SPARC_R_G0],

         &registers[REGISTER_BYTE (G0_REGNUM)], 32 * SPARC_GREG_SIZE);

  bcopy (&sparc_greg_packet[SPARC_R_Y],

         &registers[REGISTER_BYTE (Y_REGNUM)], 6 * SPARC_GREG_SIZE);

  /* Now write the local and in registers to the register window

     spill area in the frame.  VxWorks does not do this for the

     active frame automatically; it greatly simplifies debugging

     (FRAME_FIND_SAVED_REGS, in particular, depends on this).  */

  sp = extract_address (&registers[REGISTER_BYTE (SP_REGNUM)],

                        REGISTER_RAW_SIZE (CORE_ADDR));

  write_memory (sp, &registers[REGISTER_BYTE (L0_REGNUM)],

                16 * REGISTER_RAW_SIZE (L0_REGNUM));

  /* If the target has floating point registers, fetch them.

     Otherwise, zero the floating point register values in

     registers[] for good measure, even though we might not

     need to.  */

  if (target_has_fp)

    {

      net_read_registers (sparc_fpreg_packet, SPARC_FPREG_PLEN,

                          PTRACE_GETFPREGS);

      bcopy (&sparc_fpreg_packet[SPARC_R_FP0],

             &registers[REGISTER_BYTE (FP0_REGNUM)], 32 * SPARC_FPREG_SIZE);

      bcopy (&sparc_fpreg_packet[SPARC_R_FSR],

             &registers[REGISTER_BYTE (FPS_REGNUM)], 1 * SPARC_FPREG_SIZE);

    }

  else

    {

      bzero (&registers[REGISTER_BYTE (FP0_REGNUM)], 32 * SPARC_FPREG_SIZE);

      bzero (&registers[REGISTER_BYTE (FPS_REGNUM)], 1 * SPARC_FPREG_SIZE);

    }

  /* Mark the register cache valid.  */

  registers_fetched ();

}

/* Store a register or registers into the VxWorks target.

   REGNO is the register to store, or -1 for all; currently,

   it is ignored.  FIXME look at regno to improve efficiency.  */

void

vx_write_register (int regno)

{

  char sparc_greg_packet[SPARC_GREG_PLEN];

  char sparc_fpreg_packet[SPARC_FPREG_PLEN];

  int in_gp_regs;

  int in_fp_regs;

  CORE_ADDR sp;

  /* Store general purpose registers.  When copying values from

     registers [], don't assume that a location in registers []

     is properly aligned for the target data type.  */

  in_gp_regs = 1;

  in_fp_regs = 1;

  if (regno >= 0)

    {

      if ((G0_REGNUM <= regno && regno <= I7_REGNUM)

          || (Y_REGNUM <= regno && regno <= NPC_REGNUM))

        in_fp_regs = 0;

      else

        in_gp_regs = 0;

    }

  if (in_gp_regs)

    {

      bcopy (&registers[REGISTER_BYTE (G0_REGNUM)],

             &sparc_greg_packet[SPARC_R_G0], 32 * SPARC_GREG_SIZE);

      bcopy (&registers[REGISTER_BYTE (Y_REGNUM)],

             &sparc_greg_packet[SPARC_R_Y], 6 * SPARC_GREG_SIZE);

      net_write_registers (sparc_greg_packet, SPARC_GREG_PLEN, PTRACE_SETREGS);

      /* If this is a local or in register, or we're storing all

         registers, update the register window spill area.  */

      if (regno < 0 || (L0_REGNUM <= regno && regno <= I7_REGNUM))

        {

          sp = extract_address (&registers[REGISTER_BYTE (SP_REGNUM)],

                                REGISTER_RAW_SIZE (CORE_ADDR));

          write_memory (sp, &registers[REGISTER_BYTE (L0_REGNUM)],

                        16 * REGISTER_RAW_SIZE (L0_REGNUM));

        }

    }

  /* Store floating point registers if the target has them.  */

  if (in_fp_regs && target_has_fp)

    {

      bcopy (&registers[REGISTER_BYTE (FP0_REGNUM)],

             &sparc_fpreg_packet[SPARC_R_FP0], 32 * SPARC_FPREG_SIZE);

      bcopy (&registers[REGISTER_BYTE (FPS_REGNUM)],

             &sparc_fpreg_packet[SPARC_R_FSR], 1 * SPARC_FPREG_SIZE);

      net_write_registers (sparc_fpreg_packet, SPARC_FPREG_PLEN,

                           PTRACE_SETFPREGS);

    }

}