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 "target.h"
  30 #include "gdbcore.h"
  31 #include "command.h"
  32 #include "symtab.h"
  33 #include "symfile.h"            /* for struct complaint */
  34 #include "regcache.h"
  35
  36 #include "gdb_string.h"
  37 #include <errno.h>
  38 #include <fcntl.h>
  39 #include <sys/types.h>
  40 #include <sys/time.h>
  41 #include <sys/socket.h>
  42
  43 #ifdef _AIX                     /* IBM claims "void *malloc()" not char * */
  44 #define malloc bogon_malloc
  45 #endif
  46
  47 #include <rpc/rpc.h>
  48 #include <sys/time.h>           /* UTek's <rpc/rpc.h> doesn't #incl this */
  49 #include <netdb.h>
  50 #include "vx-share/ptrace.h"
  51 #include "vx-share/xdr_ptrace.h"
  52 #include "vx-share/xdr_ld.h"
  53 #include "vx-share/xdr_rdb.h"
  54 #include "vx-share/dbgRpcLib.h"
  55
  56 /* get rid of value.h if possible */
  57 #include <value.h>
  58 #include <symtab.h>
  59
  60 /* Flag set if target has fpu */
  61
  62 extern int target_has_fp;
  63
  64 /* 960 floating point format descriptor, from "i960-tdep.c."  */
  65
  66 extern struct ext_format ext_format_i960;
  67
  68 /* Generic register read/write routines in remote-vx.c.  */
  69
  70 extern void net_read_registers ();
  71 extern void net_write_registers ();
  72
  73 /* Read a register or registers from the VxWorks target.
  74    REGNO is the register to read, or -1 for all; currently,
  75    it is ignored.  FIXME look at regno to improve efficiency.  */
  76
  77 void
  78 vx_read_register (int regno)
  79 {
  80   char i960_greg_packet[I960_GREG_PLEN];
  81   char i960_fpreg_packet[I960_FPREG_PLEN];
  82
  83   /* Get general-purpose registers.  When copying values into
  84      registers [], don't assume that a location in registers []
  85      is properly aligned for the target data type.  */
  86
  87   net_read_registers (i960_greg_packet, I960_GREG_PLEN, PTRACE_GETREGS);
  88
  89   bcopy (&i960_greg_packet[I960_R_R0],
  90          &registers[REGISTER_BYTE (R0_REGNUM)], 16 * I960_GREG_SIZE);
  91   bcopy (&i960_greg_packet[I960_R_G0],
  92          &registers[REGISTER_BYTE (G0_REGNUM)], 16 * I960_GREG_SIZE);
  93   bcopy (&i960_greg_packet[I960_R_PCW],
  94          &registers[REGISTER_BYTE (PCW_REGNUM)], sizeof (int));
  95   bcopy (&i960_greg_packet[I960_R_ACW],
  96          &registers[REGISTER_BYTE (ACW_REGNUM)], sizeof (int));
  97   bcopy (&i960_greg_packet[I960_R_TCW],
  98          &registers[REGISTER_BYTE (TCW_REGNUM)], sizeof (int));
  99
 100   /* If the target has floating point registers, fetch them.
 101      Otherwise, zero the floating point register values in
 102      registers[] for good measure, even though we might not
 103      need to.  */
 104
 105   if (target_has_fp)
 106     {
 107       net_read_registers (i960_fpreg_packet, I960_FPREG_PLEN,
 108                           PTRACE_GETFPREGS);
 109       bcopy (&i960_fpreg_packet[I960_R_FP0],
 110              &registers[REGISTER_BYTE (FP0_REGNUM)],
 111              REGISTER_RAW_SIZE (FP0_REGNUM) * 4);
 112     }
 113   else
 114     bzero (&registers[REGISTER_BYTE (FP0_REGNUM)],
 115            REGISTER_RAW_SIZE (FP0_REGNUM) * 4);
 116
 117   /* Mark the register cache valid.  */
 118
 119   registers_fetched ();
 120 }
 121
 122 /* Store a register or registers into the VxWorks target.
 123    REGNO is the register to store, or -1 for all; currently,
 124    it is ignored.  FIXME look at regno to improve efficiency.  */
 125
 126 void
 127 vx_write_register (int regno)
 128 {
 129   char i960_greg_packet[I960_GREG_PLEN];
 130   char i960_fpreg_packet[I960_FPREG_PLEN];
 131
 132   /* Store floating-point registers.  When copying values from
 133      registers [], don't assume that a location in registers []
 134      is properly aligned for the target data type.  */
 135
 136   bcopy (&registers[REGISTER_BYTE (R0_REGNUM)],
 137          &i960_greg_packet[I960_R_R0], 16 * I960_GREG_SIZE);
 138   bcopy (&registers[REGISTER_BYTE (G0_REGNUM)],
 139          &i960_greg_packet[I960_R_G0], 16 * I960_GREG_SIZE);
 140   bcopy (&registers[REGISTER_BYTE (PCW_REGNUM)],
 141          &i960_greg_packet[I960_R_PCW], sizeof (int));
 142   bcopy (&registers[REGISTER_BYTE (ACW_REGNUM)],
 143          &i960_greg_packet[I960_R_ACW], sizeof (int));
 144   bcopy (&registers[REGISTER_BYTE (TCW_REGNUM)],
 145          &i960_greg_packet[I960_R_TCW], sizeof (int));
 146
 147   net_write_registers (i960_greg_packet, I960_GREG_PLEN, PTRACE_SETREGS);
 148
 149   /* Store floating point registers if the target has them.  */
 150
 151   if (target_has_fp)
 152     {
 153       bcopy (&registers[REGISTER_BYTE (FP0_REGNUM)],
 154              &i960_fpreg_packet[I960_R_FP0],
 155              REGISTER_RAW_SIZE (FP0_REGNUM) * 4);
 156
 157       net_write_registers (i960_fpreg_packet, I960_FPREG_PLEN,
 158                            PTRACE_SETFPREGS);
 159     }
 160 }