gdb/remote-vx960.c

   1 /* i80960-dependent portions of the RPC protocol
   2    used with a VxWorks target
   3
   4    Contributed by Wind River Systems.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 59 Temple Place - Suite 330,
  21    Boston, MA 02111-1307, USA.  */
  22
  23 #include <stdio.h>
  24 #include "defs.h"
  25
  26 #include "vx-share/regPacket.h"
  27 #include "frame.h"
  28 #include "inferior.h"
  29 #include "gdb_wait.h"
  30 #include "target.h"
  31 #include "gdbcore.h"
  32 #include "command.h"
  33 #include "symtab.h"
  34 #include "symfile.h"            /* for struct complaint */
  35
  36 #include "gdb_string.h"
  37 #include <errno.h>
  38 #include <signal.h>
  39 #include <fcntl.h>
  40 #include <sys/types.h>
  41 #include <sys/time.h>
  42 #include <sys/socket.h>
  43
  44 #ifdef _AIX                     /* IBM claims "void *malloc()" not char * */
  45 #define malloc bogon_malloc
  46 #endif
  47
  48 #include <rpc/rpc.h>
  49 #include <sys/time.h>           /* UTek's <rpc/rpc.h> doesn't #incl this */
  50 #include <netdb.h>
  51 #include "vx-share/ptrace.h"
  52 #include "vx-share/xdr_ptrace.h"
  53 #include "vx-share/xdr_ld.h"
  54 #include "vx-share/xdr_rdb.h"
  55 #include "vx-share/dbgRpcLib.h"
  56
  57 /* get rid of value.h if possible */
  58 #include <value.h>
  59 #include <symtab.h>
  60
  61 /* Flag set if target has fpu */
  62
  63 extern int target_has_fp;
  64
  65 /* 960 floating point format descriptor, from "i960-tdep.c."  */
  66
  67 extern struct ext_format ext_format_i960;
  68
  69 /* Generic register read/write routines in remote-vx.c.  */
  70
  71 extern void net_read_registers ();
  72 extern void net_write_registers ();
  73
  74 /* Read a register or registers from the VxWorks target.
  75    REGNO is the register to read, or -1 for all; currently,
  76    it is ignored.  FIXME look at regno to improve efficiency.  */
  77
  78 void
  79 vx_read_register (int regno)
  80 {
  81   char i960_greg_packet[I960_GREG_PLEN];
  82   char i960_fpreg_packet[I960_FPREG_PLEN];
  83
  84   /* Get general-purpose registers.  When copying values into
  85      registers [], don't assume that a location in registers []
  86      is properly aligned for the target data type.  */
  87
  88   net_read_registers (i960_greg_packet, I960_GREG_PLEN, PTRACE_GETREGS);
  89
  90   bcopy (&i960_greg_packet[I960_R_R0],
  91          &registers[REGISTER_BYTE (R0_REGNUM)], 16 * I960_GREG_SIZE);
  92   bcopy (&i960_greg_packet[I960_R_G0],
  93          &registers[REGISTER_BYTE (G0_REGNUM)], 16 * I960_GREG_SIZE);
  94   bcopy (&i960_greg_packet[I960_R_PCW],
  95          &registers[REGISTER_BYTE (PCW_REGNUM)], sizeof (int));
  96   bcopy (&i960_greg_packet[I960_R_ACW],
  97          &registers[REGISTER_BYTE (ACW_REGNUM)], sizeof (int));
  98   bcopy (&i960_greg_packet[I960_R_TCW],
  99          &registers[REGISTER_BYTE (TCW_REGNUM)], sizeof (int));
 100
 101   /* If the target has floating point registers, fetch them.
 102      Otherwise, zero the floating point register values in
 103      registers[] for good measure, even though we might not
 104      need to.  */
 105
 106   if (target_has_fp)
 107     {
 108       net_read_registers (i960_fpreg_packet, I960_FPREG_PLEN,
 109                           PTRACE_GETFPREGS);
 110       bcopy (&i960_fpreg_packet[I960_R_FP0],
 111              &registers[REGISTER_BYTE (FP0_REGNUM)],
 112              REGISTER_RAW_SIZE (FP0_REGNUM) * 4);
 113     }
 114   else
 115     bzero (&registers[REGISTER_BYTE (FP0_REGNUM)],
 116            REGISTER_RAW_SIZE (FP0_REGNUM) * 4);
 117
 118   /* Mark the register cache valid.  */
 119
 120   registers_fetched ();
 121 }
 122
 123 /* Store a register or registers into the VxWorks target.
 124    REGNO is the register to store, or -1 for all; currently,
 125    it is ignored.  FIXME look at regno to improve efficiency.  */
 126
 127 void
 128 vx_write_register (int regno)
 129 {
 130   char i960_greg_packet[I960_GREG_PLEN];
 131   char i960_fpreg_packet[I960_FPREG_PLEN];
 132
 133   /* Store floating-point registers.  When copying values from
 134      registers [], don't assume that a location in registers []
 135      is properly aligned for the target data type.  */
 136
 137   bcopy (&registers[REGISTER_BYTE (R0_REGNUM)],
 138          &i960_greg_packet[I960_R_R0], 16 * I960_GREG_SIZE);
 139   bcopy (&registers[REGISTER_BYTE (G0_REGNUM)],
 140          &i960_greg_packet[I960_R_G0], 16 * I960_GREG_SIZE);
 141   bcopy (&registers[REGISTER_BYTE (PCW_REGNUM)],
 142          &i960_greg_packet[I960_R_PCW], sizeof (int));
 143   bcopy (&registers[REGISTER_BYTE (ACW_REGNUM)],
 144          &i960_greg_packet[I960_R_ACW], sizeof (int));
 145   bcopy (&registers[REGISTER_BYTE (TCW_REGNUM)],
 146          &i960_greg_packet[I960_R_TCW], sizeof (int));
 147
 148   net_write_registers (i960_greg_packet, I960_GREG_PLEN, PTRACE_SETREGS);
 149
 150   /* Store floating point registers if the target has them.  */
 151
 152   if (target_has_fp)
 153     {
 154       bcopy (&registers[REGISTER_BYTE (FP0_REGNUM)],
 155              &i960_fpreg_packet[I960_R_FP0],
 156              REGISTER_RAW_SIZE (FP0_REGNUM) * 4);
 157
 158       net_write_registers (i960_fpreg_packet, I960_FPREG_PLEN,
 159                            PTRACE_SETFPREGS);
 160     }
 161 }