gdb/remote-vx68.c

   1 /* 68k-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
  49 #ifdef _AIX
  50 #undef malloc
  51 #endif
  52
  53 #include <sys/time.h>           /* UTek's <rpc/rpc.h> doesn't #incl this */
  54 #include <netdb.h>
  55 #include "vx-share/ptrace.h"
  56 #include "vx-share/xdr_ptrace.h"
  57 #include "vx-share/xdr_ld.h"
  58 #include "vx-share/xdr_rdb.h"
  59 #include "vx-share/dbgRpcLib.h"
  60
  61 /* get rid of value.h if possible */
  62 #include <value.h>
  63 #include <symtab.h>
  64
  65 /* Flag set if target has fpu */
  66
  67 extern int target_has_fp;
  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 mc68k_greg_packet[MC68K_GREG_PLEN];
  82   char mc68k_fpreg_packet[MC68K_FPREG_PLEN];
  83
  84   /* Get general-purpose registers.  */
  85
  86   net_read_registers (mc68k_greg_packet, MC68K_GREG_PLEN, PTRACE_GETREGS);
  87
  88   bcopy (&mc68k_greg_packet[MC68K_R_D0], registers, 16 * MC68K_GREG_SIZE);
  89   bcopy (&mc68k_greg_packet[MC68K_R_SR], &registers[REGISTER_BYTE (PS_REGNUM)],
  90          MC68K_GREG_SIZE);
  91   bcopy (&mc68k_greg_packet[MC68K_R_PC], &registers[REGISTER_BYTE (PC_REGNUM)],
  92          MC68K_GREG_SIZE);
  93
  94   /* Get floating-point registers, if the target system has them.
  95      Otherwise, zero them.  */
  96
  97   if (target_has_fp)
  98     {
  99       net_read_registers (mc68k_fpreg_packet, MC68K_FPREG_PLEN,
 100                           PTRACE_GETFPREGS);
 101
 102       bcopy (&mc68k_fpreg_packet[MC68K_R_FP0],
 103              &registers[REGISTER_BYTE (FP0_REGNUM)],
 104              MC68K_FPREG_SIZE * 8);
 105       bcopy (&mc68k_fpreg_packet[MC68K_R_FPCR],
 106              &registers[REGISTER_BYTE (FPC_REGNUM)],
 107              MC68K_FPREG_PLEN - (MC68K_FPREG_SIZE * 8));
 108     }
 109   else
 110     {
 111       bzero (&registers[REGISTER_BYTE (FP0_REGNUM)],
 112              MC68K_FPREG_SIZE * 8);
 113       bzero (&registers[REGISTER_BYTE (FPC_REGNUM)],
 114              MC68K_FPREG_PLEN - (MC68K_FPREG_SIZE * 8));
 115     }
 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 mc68k_greg_packet[MC68K_GREG_PLEN];
 130   char mc68k_fpreg_packet[MC68K_FPREG_PLEN];
 131
 132   /* Store general-purpose registers.  */
 133
 134   bcopy (registers, &mc68k_greg_packet[MC68K_R_D0], 16 * MC68K_GREG_SIZE);
 135   bcopy (&registers[REGISTER_BYTE (PS_REGNUM)],
 136          &mc68k_greg_packet[MC68K_R_SR], MC68K_GREG_SIZE);
 137   bcopy (&registers[REGISTER_BYTE (PC_REGNUM)],
 138          &mc68k_greg_packet[MC68K_R_PC], MC68K_GREG_SIZE);
 139
 140   net_write_registers (mc68k_greg_packet, MC68K_GREG_PLEN, PTRACE_SETREGS);
 141
 142   /* Store floating point registers if the target has them.  */
 143
 144   if (target_has_fp)
 145     {
 146       bcopy (&registers[REGISTER_BYTE (FP0_REGNUM)],
 147              &mc68k_fpreg_packet[MC68K_R_FP0],
 148              MC68K_FPREG_SIZE * 8);
 149       bcopy (&registers[REGISTER_BYTE (FPC_REGNUM)],
 150              &mc68k_fpreg_packet[MC68K_R_FPCR],
 151              MC68K_FPREG_PLEN - (MC68K_FPREG_SIZE * 8));
 152
 153       net_write_registers (mc68k_fpreg_packet, MC68K_FPREG_PLEN,
 154                            PTRACE_SETFPREGS);
 155     }
 156 }