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/* Am29k-dependent portions of the RPC protocol

   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;

/* 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 am29k_greg_packet[AM29K_GREG_PLEN];

  char am29k_fpreg_packet[AM29K_FPREG_PLEN];

  /* 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 (am29k_greg_packet, AM29K_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-29k.h".  */

  bcopy (&am29k_greg_packet[AM29K_R_GR96],

         &registers[REGISTER_BYTE (GR96_REGNUM)], 160 * AM29K_GREG_SIZE);

  bcopy (&am29k_greg_packet[AM29K_R_VAB],

         &registers[REGISTER_BYTE (VAB_REGNUM)], 15 * AM29K_GREG_SIZE);

  registers[REGISTER_BYTE (INTE_REGNUM)] = am29k_greg_packet[AM29K_R_INTE];

  bcopy (&am29k_greg_packet[AM29K_R_RSP],

         &registers[REGISTER_BYTE (GR1_REGNUM)], 5 * AM29K_GREG_SIZE);

  /* PAD For now, don't care about exop register */

  memset (&registers[REGISTER_BYTE (EXO_REGNUM)], '\0', AM29K_GREG_SIZE);

  /* 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 (am29k_fpreg_packet, AM29K_FPREG_PLEN,

                          PTRACE_GETFPREGS);

      registers[REGISTER_BYTE (FPE_REGNUM)] = am29k_fpreg_packet[AM29K_R_FPE];

      registers[REGISTER_BYTE (FPS_REGNUM)] = am29k_fpreg_packet[AM29K_R_FPS];

      /* PAD For now, don't care about registers (?) AI0 to q */

      memset (&registers[REGISTER_BYTE (161)], '\0', 21 * AM29K_FPREG_SIZE);

    }

  else

    {

      memset (&registers[REGISTER_BYTE (FPE_REGNUM)], '\0', AM29K_FPREG_SIZE);

      memset (&registers[REGISTER_BYTE (FPS_REGNUM)], '\0', AM29K_FPREG_SIZE);

      /* PAD For now, don't care about registers (?) AI0 to q */

      memset (&registers[REGISTER_BYTE (161)], '\0', 21 * AM29K_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 am29k_greg_packet[AM29K_GREG_PLEN];

  char am29k_fpreg_packet[AM29K_FPREG_PLEN];

  /* 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.  */

  bcopy (&registers[REGISTER_BYTE (GR96_REGNUM)],

         &am29k_greg_packet[AM29K_R_GR96], 160 * AM29K_GREG_SIZE);

  bcopy (&registers[REGISTER_BYTE (VAB_REGNUM)],

         &am29k_greg_packet[AM29K_R_VAB], 15 * AM29K_GREG_SIZE);

  am29k_greg_packet[AM29K_R_INTE] = registers[REGISTER_BYTE (INTE_REGNUM)];

  bcopy (&registers[REGISTER_BYTE (GR1_REGNUM)],

         &am29k_greg_packet[AM29K_R_RSP], 5 * AM29K_GREG_SIZE);

  net_write_registers (am29k_greg_packet, AM29K_GREG_PLEN, PTRACE_SETREGS);

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

  if (target_has_fp)

    {

      am29k_fpreg_packet[AM29K_R_FPE] = registers[REGISTER_BYTE (FPE_REGNUM)];

      am29k_fpreg_packet[AM29K_R_FPS] = registers[REGISTER_BYTE (FPS_REGNUM)];

      net_write_registers (am29k_fpreg_packet, AM29K_FPREG_PLEN,

                           PTRACE_SETFPREGS);

    }

}

/* VxWorks zeroes fp when the task is initialized; we use this

   to terminate the frame chain. Chain means here the nominal address of

   a frame, that is, the return address (lr0) address in the stack. To

   obtain the frame pointer (lr1) contents, we must add 4 bytes.

   Note : may be we should modify init_frame_info() to get the frame pointer

   and store it into the frame_info struct rather than reading its

   contents when FRAME_CHAIN_VALID is invoked.  THISFRAME is unused.  */

int

vx29k_frame_chain_valid (CORE_ADDR chain, struct frame_info *thisframe)

{

  int fp_contents;

  read_memory ((CORE_ADDR) (chain + 4), (char *) &fp_contents, 4);

  return (fp_contents != 0);

}