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[/] [or1k/] [trunk/] [gdb-5.0/] [gdb/] [remote-vxsparc.c] - Blame information for rev 1765

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1 104 markom
/* sparc-dependent portions of the RPC protocol
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   used with a VxWorks target
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   Contributed by Wind River Systems.
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   This file is part of GDB.
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   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 2 of the License, or
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   (at your option) any later version.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program; if not, write to the Free Software
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   Foundation, Inc., 59 Temple Place - Suite 330,
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   Boston, MA 02111-1307, USA.  */
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#include <stdio.h>
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#include "defs.h"
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#include "vx-share/regPacket.h"
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#include "frame.h"
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#include "inferior.h"
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#include "gdb_wait.h"
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#include "target.h"
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#include "gdbcore.h"
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#include "command.h"
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#include "symtab.h"
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#include "symfile.h"            /* for struct complaint */
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#include "gdb_string.h"
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#include <errno.h>
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#include <signal.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#ifdef _AIX                     /* IBM claims "void *malloc()" not char * */
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#define malloc bogon_malloc
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#endif
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#include <rpc/rpc.h>
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#include <sys/time.h>           /* UTek's <rpc/rpc.h> doesn't #incl this */
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#include <netdb.h>
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#include "vx-share/ptrace.h"
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#include "vx-share/xdr_ptrace.h"
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#include "vx-share/xdr_ld.h"
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#include "vx-share/xdr_rdb.h"
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#include "vx-share/dbgRpcLib.h"
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/* get rid of value.h if possible */
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#include <value.h>
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#include <symtab.h>
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/* Flag set if target has fpu */
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extern int target_has_fp;
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/* sparc floating point format descriptor, from "sparc-tdep.c."  */
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extern struct ext_format ext_format_sparc;
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/* Generic register read/write routines in remote-vx.c.  */
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extern void net_read_registers ();
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extern void net_write_registers ();
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/* Read a register or registers from the VxWorks target.
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   REGNO is the register to read, or -1 for all; currently,
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   it is ignored.  FIXME look at regno to improve efficiency.  */
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void
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vx_read_register (regno)
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     int regno;
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{
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  char sparc_greg_packet[SPARC_GREG_PLEN];
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  char sparc_fpreg_packet[SPARC_FPREG_PLEN];
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  CORE_ADDR sp;
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  /* Get general-purpose registers.  When copying values into
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     registers [], don't assume that a location in registers []
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     is properly aligned for the target data type.  */
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  net_read_registers (sparc_greg_packet, SPARC_GREG_PLEN, PTRACE_GETREGS);
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  /* Now copy the register values into registers[].
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     Note that this code depends on the ordering of the REGNUMs
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     as defined in "tm-sparc.h".  */
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  bcopy (&sparc_greg_packet[SPARC_R_G0],
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         &registers[REGISTER_BYTE (G0_REGNUM)], 32 * SPARC_GREG_SIZE);
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  bcopy (&sparc_greg_packet[SPARC_R_Y],
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         &registers[REGISTER_BYTE (Y_REGNUM)], 6 * SPARC_GREG_SIZE);
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  /* Now write the local and in registers to the register window
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     spill area in the frame.  VxWorks does not do this for the
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     active frame automatically; it greatly simplifies debugging
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     (FRAME_FIND_SAVED_REGS, in particular, depends on this).  */
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  sp = extract_address (&registers[REGISTER_BYTE (SP_REGNUM)],
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                        REGISTER_RAW_SIZE (CORE_ADDR));
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  write_memory (sp, &registers[REGISTER_BYTE (L0_REGNUM)],
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                16 * REGISTER_RAW_SIZE (L0_REGNUM));
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  /* If the target has floating point registers, fetch them.
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     Otherwise, zero the floating point register values in
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     registers[] for good measure, even though we might not
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     need to.  */
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  if (target_has_fp)
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    {
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      net_read_registers (sparc_fpreg_packet, SPARC_FPREG_PLEN,
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                          PTRACE_GETFPREGS);
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      bcopy (&sparc_fpreg_packet[SPARC_R_FP0],
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             &registers[REGISTER_BYTE (FP0_REGNUM)], 32 * SPARC_FPREG_SIZE);
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      bcopy (&sparc_fpreg_packet[SPARC_R_FSR],
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             &registers[REGISTER_BYTE (FPS_REGNUM)], 1 * SPARC_FPREG_SIZE);
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    }
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  else
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    {
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      bzero (&registers[REGISTER_BYTE (FP0_REGNUM)], 32 * SPARC_FPREG_SIZE);
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      bzero (&registers[REGISTER_BYTE (FPS_REGNUM)], 1 * SPARC_FPREG_SIZE);
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    }
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  /* Mark the register cache valid.  */
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  registers_fetched ();
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}
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/* Store a register or registers into the VxWorks target.
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   REGNO is the register to store, or -1 for all; currently,
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   it is ignored.  FIXME look at regno to improve efficiency.  */
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void
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vx_write_register (regno)
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     int regno;
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{
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  char sparc_greg_packet[SPARC_GREG_PLEN];
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  char sparc_fpreg_packet[SPARC_FPREG_PLEN];
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  int in_gp_regs;
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  int in_fp_regs;
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  CORE_ADDR sp;
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  /* Store general purpose registers.  When copying values from
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     registers [], don't assume that a location in registers []
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     is properly aligned for the target data type.  */
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  in_gp_regs = 1;
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  in_fp_regs = 1;
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  if (regno >= 0)
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    {
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      if ((G0_REGNUM <= regno && regno <= I7_REGNUM)
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          || (Y_REGNUM <= regno && regno <= NPC_REGNUM))
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        in_fp_regs = 0;
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      else
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        in_gp_regs = 0;
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    }
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  if (in_gp_regs)
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    {
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      bcopy (&registers[REGISTER_BYTE (G0_REGNUM)],
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             &sparc_greg_packet[SPARC_R_G0], 32 * SPARC_GREG_SIZE);
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      bcopy (&registers[REGISTER_BYTE (Y_REGNUM)],
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             &sparc_greg_packet[SPARC_R_Y], 6 * SPARC_GREG_SIZE);
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      net_write_registers (sparc_greg_packet, SPARC_GREG_PLEN, PTRACE_SETREGS);
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      /* If this is a local or in register, or we're storing all
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         registers, update the register window spill area.  */
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      if (regno < 0 || (L0_REGNUM <= regno && regno <= I7_REGNUM))
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        {
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          sp = extract_address (&registers[REGISTER_BYTE (SP_REGNUM)],
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                                REGISTER_RAW_SIZE (CORE_ADDR));
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          write_memory (sp, &registers[REGISTER_BYTE (L0_REGNUM)],
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                        16 * REGISTER_RAW_SIZE (L0_REGNUM));
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        }
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    }
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  /* Store floating point registers if the target has them.  */
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  if (in_fp_regs && target_has_fp)
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    {
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      bcopy (&registers[REGISTER_BYTE (FP0_REGNUM)],
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             &sparc_fpreg_packet[SPARC_R_FP0], 32 * SPARC_FPREG_SIZE);
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      bcopy (&registers[REGISTER_BYTE (FPS_REGNUM)],
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             &sparc_fpreg_packet[SPARC_R_FSR], 1 * SPARC_FPREG_SIZE);
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      net_write_registers (sparc_fpreg_packet, SPARC_FPREG_PLEN,
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                           PTRACE_SETFPREGS);
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    }
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}

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