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"
  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   memcpy (deprecated_registers,
  89           &mc68k_greg_packet[MC68K_R_D0]
  90           16 * MC68K_GREG_SIZE);
  91   memcpy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (PS_REGNUM)],
  92           &mc68k_greg_packet[MC68K_R_SR],
  93           MC68K_GREG_SIZE);
  94   memcpy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (PC_REGNUM)],
  95           &mc68k_greg_packet[MC68K_R_PC],
  96           MC68K_GREG_SIZE);
  97
  98   /* Get floating-point registers, if the target system has them.
  99      Otherwise, zero them.  */
 100
 101   if (target_has_fp)
 102     {
 103       net_read_registers (mc68k_fpreg_packet, MC68K_FPREG_PLEN,
 104                           PTRACE_GETFPREGS);
 105
 106       memcpy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (FP0_REGNUM)],
 107               &mc68k_fpreg_packet[MC68K_R_FP0],
 108               MC68K_FPREG_SIZE * 8);
 109       memcpy (&deprecated_registers[DEPRECATED_REGISTER_BYTE (FPC_REGNUM)],
 110               &mc68k_fpreg_packet[MC68K_R_FPCR],
 111               MC68K_FPREG_PLEN - (MC68K_FPREG_SIZE * 8));
 112     }
 113   else
 114     {
 115       memset (&deprecated_registers[DEPRECATED_REGISTER_BYTE (FP0_REGNUM)],
 116               0, MC68K_FPREG_SIZE * 8);
 117       memset (&deprecated_registers[DEPRECATED_REGISTER_BYTE (FPC_REGNUM)],
 118               0, MC68K_FPREG_PLEN - (MC68K_FPREG_SIZE * 8));
 119     }
 120
 121   /* Mark the register cache valid.  */
 122
 123   deprecated_registers_fetched ();
 124 }
 125
 126 /* Store a register or registers into the VxWorks target.
 127    REGNO is the register to store, or -1 for all; currently,
 128    it is ignored.  FIXME look at regno to improve efficiency.  */
 129
 130 void
 131 vx_write_register (int regno)
 132 {
 133   char mc68k_greg_packet[MC68K_GREG_PLEN];
 134   char mc68k_fpreg_packet[MC68K_FPREG_PLEN];
 135
 136   /* Store general-purpose registers.  */
 137
 138   memcpy (&mc68k_greg_packet[MC68K_R_D0], deprecated_registers,
 139           16 * MC68K_GREG_SIZE);
 140   memcpy (&mc68k_greg_packet[MC68K_R_SR],
 141           &deprecated_registers[DEPRECATED_REGISTER_BYTE (PS_REGNUM)],
 142           MC68K_GREG_SIZE);
 143   memcpy (&mc68k_greg_packet[MC68K_R_PC],
 144           &deprecated_registers[DEPRECATED_REGISTER_BYTE (PC_REGNUM)],
 145           MC68K_GREG_SIZE);
 146
 147   net_write_registers (mc68k_greg_packet, MC68K_GREG_PLEN, PTRACE_SETREGS);
 148
 149   /* Store floating point registers if the target has them.  */
 150
 151   if (target_has_fp)
 152     {
 153       memcpy (&mc68k_fpreg_packet[MC68K_R_FP0],
 154               &deprecated_registers[DEPRECATED_REGISTER_BYTE (FP0_REGNUM)],
 155               MC68K_FPREG_SIZE * 8);
 156       memcpy (&mc68k_fpreg_packet[MC68K_R_FPCR],
 157               &deprecated_registers[DEPRECATED_REGISTER_BYTE (FPC_REGNUM)],
 158               MC68K_FPREG_PLEN - (MC68K_FPREG_SIZE * 8));
 159
 160       net_write_registers (mc68k_fpreg_packet, MC68K_FPREG_PLEN,
 161                            PTRACE_SETFPREGS);
 162     }
 163 }