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
  35 #include "gdb_string.h"
  36 #include <errno.h>
  37 #include <fcntl.h>
  38 #include <sys/types.h>
  39 #include <sys/time.h>
  40 #include <sys/socket.h>
  41
  42 #ifdef _AIX                     /* IBM claims "void *malloc()" not char * */
  43 #define malloc bogon_malloc
  44 #endif
  45
  46 #include <rpc/rpc.h>
  47
  48 #ifdef _AIX
  49 #undef malloc
  50 #endif
  51
  52 #include <sys/time.h>           /* UTek's <rpc/rpc.h> doesn't #incl this */
  53 #include <netdb.h>
  54 #include "vx-share/ptrace.h"
  55 #include "vx-share/xdr_ptrace.h"
  56 #include "vx-share/xdr_ld.h"
  57 #include "vx-share/xdr_rdb.h"
  58 #include "vx-share/dbgRpcLib.h"
  59
  60 /* get rid of value.h if possible */
  61 #include <value.h>
  62 #include <symtab.h>
  63
  64 /* Flag set if target has fpu */
  65
  66 extern int target_has_fp;
  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 mc68k_greg_packet[MC68K_GREG_PLEN];
  81   char mc68k_fpreg_packet[MC68K_FPREG_PLEN];
  82
  83   /* Get general-purpose registers.  */
  84
  85   net_read_registers (mc68k_greg_packet, MC68K_GREG_PLEN, PTRACE_GETREGS);
  86
  87   bcopy (&mc68k_greg_packet[MC68K_R_D0], registers, 16 * MC68K_GREG_SIZE);
  88   bcopy (&mc68k_greg_packet[MC68K_R_SR], &registers[REGISTER_BYTE (PS_REGNUM)],
  89          MC68K_GREG_SIZE);
  90   bcopy (&mc68k_greg_packet[MC68K_R_PC], &registers[REGISTER_BYTE (PC_REGNUM)],
  91          MC68K_GREG_SIZE);
  92
  93   /* Get floating-point registers, if the target system has them.
  94      Otherwise, zero them.  */
  95
  96   if (target_has_fp)
  97     {
  98       net_read_registers (mc68k_fpreg_packet, MC68K_FPREG_PLEN,
  99                           PTRACE_GETFPREGS);
 100
 101       bcopy (&mc68k_fpreg_packet[MC68K_R_FP0],
 102              &registers[REGISTER_BYTE (FP0_REGNUM)],
 103              MC68K_FPREG_SIZE * 8);
 104       bcopy (&mc68k_fpreg_packet[MC68K_R_FPCR],
 105              &registers[REGISTER_BYTE (FPC_REGNUM)],
 106              MC68K_FPREG_PLEN - (MC68K_FPREG_SIZE * 8));
 107     }
 108   else
 109     {
 110       bzero (&registers[REGISTER_BYTE (FP0_REGNUM)],
 111              MC68K_FPREG_SIZE * 8);
 112       bzero (&registers[REGISTER_BYTE (FPC_REGNUM)],
 113              MC68K_FPREG_PLEN - (MC68K_FPREG_SIZE * 8));
 114     }
 115
 116   /* Mark the register cache valid.  */
 117
 118   registers_fetched ();
 119 }
 120
 121 /* Store a register or registers into the VxWorks target.
 122    REGNO is the register to store, or -1 for all; currently,
 123    it is ignored.  FIXME look at regno to improve efficiency.  */
 124
 125 void
 126 vx_write_register (int regno)
 127 {
 128   char mc68k_greg_packet[MC68K_GREG_PLEN];
 129   char mc68k_fpreg_packet[MC68K_FPREG_PLEN];
 130
 131   /* Store general-purpose registers.  */
 132
 133   bcopy (registers, &mc68k_greg_packet[MC68K_R_D0], 16 * MC68K_GREG_SIZE);
 134   bcopy (&registers[REGISTER_BYTE (PS_REGNUM)],
 135          &mc68k_greg_packet[MC68K_R_SR], MC68K_GREG_SIZE);
 136   bcopy (&registers[REGISTER_BYTE (PC_REGNUM)],
 137          &mc68k_greg_packet[MC68K_R_PC], MC68K_GREG_SIZE);
 138
 139   net_write_registers (mc68k_greg_packet, MC68K_GREG_PLEN, PTRACE_SETREGS);
 140
 141   /* Store floating point registers if the target has them.  */
 142
 143   if (target_has_fp)
 144     {
 145       bcopy (&registers[REGISTER_BYTE (FP0_REGNUM)],
 146              &mc68k_fpreg_packet[MC68K_R_FP0],
 147              MC68K_FPREG_SIZE * 8);
 148       bcopy (&registers[REGISTER_BYTE (FPC_REGNUM)],
 149              &mc68k_fpreg_packet[MC68K_R_FPCR],
 150              MC68K_FPREG_PLEN - (MC68K_FPREG_SIZE * 8));
 151
 152       net_write_registers (mc68k_fpreg_packet, MC68K_FPREG_PLEN,
 153                            PTRACE_SETFPREGS);
 154     }
 155 }