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 "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
  50 #ifdef _AIX
  51 #undef malloc
  52 #endif
  53
  54 #include <sys/time.h>           /* UTek's <rpc/rpc.h> doesn't #incl this */
  55 #include <netdb.h>
  56 #include "vx-share/ptrace.h"
  57 #include "vx-share/xdr_ptrace.h"
  58 #include "vx-share/xdr_ld.h"
  59 #include "vx-share/xdr_rdb.h"
  60 #include "vx-share/dbgRpcLib.h"
  61
  62 /* get rid of value.h if possible */
  63 #include <value.h>
  64 #include <symtab.h>
  65
  66 /* Flag set if target has fpu */
  67
  68 extern int target_has_fp;
  69
  70 /* Generic register read/write routines in remote-vx.c.  */
  71
  72 extern void net_read_registers ();
  73 extern void net_write_registers ();
  74
  75 /* Read a register or registers from the VxWorks target.
  76    REGNO is the register to read, or -1 for all; currently,
  77    it is ignored.  FIXME look at regno to improve efficiency.  */
  78
  79 void
  80 vx_read_register (int regno)
  81 {
  82   char mc68k_greg_packet[MC68K_GREG_PLEN];
  83   char mc68k_fpreg_packet[MC68K_FPREG_PLEN];
  84
  85   /* Get general-purpose registers.  */
  86
  87   net_read_registers (mc68k_greg_packet, MC68K_GREG_PLEN, PTRACE_GETREGS);
  88
  89   bcopy (&mc68k_greg_packet[MC68K_R_D0], registers, 16 * MC68K_GREG_SIZE);
  90   bcopy (&mc68k_greg_packet[MC68K_R_SR], &registers[REGISTER_BYTE (PS_REGNUM)],
  91          MC68K_GREG_SIZE);
  92   bcopy (&mc68k_greg_packet[MC68K_R_PC], &registers[REGISTER_BYTE (PC_REGNUM)],
  93          MC68K_GREG_SIZE);
  94
  95   /* Get floating-point registers, if the target system has them.
  96      Otherwise, zero them.  */
  97
  98   if (target_has_fp)
  99     {
 100       net_read_registers (mc68k_fpreg_packet, MC68K_FPREG_PLEN,
 101                           PTRACE_GETFPREGS);
 102
 103       bcopy (&mc68k_fpreg_packet[MC68K_R_FP0],
 104              &registers[REGISTER_BYTE (FP0_REGNUM)],
 105              MC68K_FPREG_SIZE * 8);
 106       bcopy (&mc68k_fpreg_packet[MC68K_R_FPCR],
 107              &registers[REGISTER_BYTE (FPC_REGNUM)],
 108              MC68K_FPREG_PLEN - (MC68K_FPREG_SIZE * 8));
 109     }
 110   else
 111     {
 112       bzero (&registers[REGISTER_BYTE (FP0_REGNUM)],
 113              MC68K_FPREG_SIZE * 8);
 114       bzero (&registers[REGISTER_BYTE (FPC_REGNUM)],
 115              MC68K_FPREG_PLEN - (MC68K_FPREG_SIZE * 8));
 116     }
 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 mc68k_greg_packet[MC68K_GREG_PLEN];
 131   char mc68k_fpreg_packet[MC68K_FPREG_PLEN];
 132
 133   /* Store general-purpose registers.  */
 134
 135   bcopy (registers, &mc68k_greg_packet[MC68K_R_D0], 16 * MC68K_GREG_SIZE);
 136   bcopy (&registers[REGISTER_BYTE (PS_REGNUM)],
 137          &mc68k_greg_packet[MC68K_R_SR], MC68K_GREG_SIZE);
 138   bcopy (&registers[REGISTER_BYTE (PC_REGNUM)],
 139          &mc68k_greg_packet[MC68K_R_PC], MC68K_GREG_SIZE);
 140
 141   net_write_registers (mc68k_greg_packet, MC68K_GREG_PLEN, PTRACE_SETREGS);
 142
 143   /* Store floating point registers if the target has them.  */
 144
 145   if (target_has_fp)
 146     {
 147       bcopy (&registers[REGISTER_BYTE (FP0_REGNUM)],
 148              &mc68k_fpreg_packet[MC68K_R_FP0],
 149              MC68K_FPREG_SIZE * 8);
 150       bcopy (&registers[REGISTER_BYTE (FPC_REGNUM)],
 151              &mc68k_fpreg_packet[MC68K_R_FPCR],
 152              MC68K_FPREG_PLEN - (MC68K_FPREG_SIZE * 8));
 153
 154       net_write_registers (mc68k_fpreg_packet, MC68K_FPREG_PLEN,
 155                            PTRACE_SETFPREGS);
 156     }
 157 }