gdb/remote-vxsparc.c

   1 /* sparc-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 #include <sys/time.h>           /* UTek's <rpc/rpc.h> doesn't #incl this */
  50 #include <netdb.h>
  51 #include "vx-share/ptrace.h"
  52 #include "vx-share/xdr_ptrace.h"
  53 #include "vx-share/xdr_ld.h"
  54 #include "vx-share/xdr_rdb.h"
  55 #include "vx-share/dbgRpcLib.h"
  56
  57 /* get rid of value.h if possible */
  58 #include <value.h>
  59 #include <symtab.h>
  60
  61 /* Flag set if target has fpu */
  62
  63 extern int target_has_fp;
  64
  65 /* sparc floating point format descriptor, from "sparc-tdep.c."  */
  66
  67 extern struct ext_format ext_format_sparc;
  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 sparc_greg_packet[SPARC_GREG_PLEN];
  82   char sparc_fpreg_packet[SPARC_FPREG_PLEN];
  83   CORE_ADDR sp;
  84
  85   /* Get general-purpose registers.  When copying values into
  86      registers [], don't assume that a location in registers []
  87      is properly aligned for the target data type.  */
  88
  89   net_read_registers (sparc_greg_packet, SPARC_GREG_PLEN, PTRACE_GETREGS);
  90
  91   /* Now copy the register values into registers[].
  92      Note that this code depends on the ordering of the REGNUMs
  93      as defined in "tm-sparc.h".  */
  94
  95   bcopy (&sparc_greg_packet[SPARC_R_G0],
  96          &registers[REGISTER_BYTE (G0_REGNUM)], 32 * SPARC_GREG_SIZE);
  97   bcopy (&sparc_greg_packet[SPARC_R_Y],
  98          &registers[REGISTER_BYTE (Y_REGNUM)], 6 * SPARC_GREG_SIZE);
  99
 100   /* Now write the local and in registers to the register window
 101      spill area in the frame.  VxWorks does not do this for the
 102      active frame automatically; it greatly simplifies debugging
 103      (FRAME_FIND_SAVED_REGS, in particular, depends on this).  */
 104
 105   sp = extract_address (&registers[REGISTER_BYTE (SP_REGNUM)],
 106                         REGISTER_RAW_SIZE (CORE_ADDR));
 107   write_memory (sp, &registers[REGISTER_BYTE (L0_REGNUM)],
 108                 16 * REGISTER_RAW_SIZE (L0_REGNUM));
 109
 110   /* If the target has floating point registers, fetch them.
 111      Otherwise, zero the floating point register values in
 112      registers[] for good measure, even though we might not
 113      need to.  */
 114
 115   if (target_has_fp)
 116     {
 117       net_read_registers (sparc_fpreg_packet, SPARC_FPREG_PLEN,
 118                           PTRACE_GETFPREGS);
 119       bcopy (&sparc_fpreg_packet[SPARC_R_FP0],
 120              &registers[REGISTER_BYTE (FP0_REGNUM)], 32 * SPARC_FPREG_SIZE);
 121       bcopy (&sparc_fpreg_packet[SPARC_R_FSR],
 122              &registers[REGISTER_BYTE (FPS_REGNUM)], 1 * SPARC_FPREG_SIZE);
 123     }
 124   else
 125     {
 126       bzero (&registers[REGISTER_BYTE (FP0_REGNUM)], 32 * SPARC_FPREG_SIZE);
 127       bzero (&registers[REGISTER_BYTE (FPS_REGNUM)], 1 * SPARC_FPREG_SIZE);
 128     }
 129
 130   /* Mark the register cache valid.  */
 131
 132   registers_fetched ();
 133 }
 134
 135 /* Store a register or registers into the VxWorks target.
 136    REGNO is the register to store, or -1 for all; currently,
 137    it is ignored.  FIXME look at regno to improve efficiency.  */
 138
 139 void
 140 vx_write_register (int regno)
 141 {
 142   char sparc_greg_packet[SPARC_GREG_PLEN];
 143   char sparc_fpreg_packet[SPARC_FPREG_PLEN];
 144   int in_gp_regs;
 145   int in_fp_regs;
 146   CORE_ADDR sp;
 147
 148   /* Store general purpose registers.  When copying values from
 149      registers [], don't assume that a location in registers []
 150      is properly aligned for the target data type.  */
 151
 152   in_gp_regs = 1;
 153   in_fp_regs = 1;
 154   if (regno >= 0)
 155     {
 156       if ((G0_REGNUM <= regno && regno <= I7_REGNUM)
 157           || (Y_REGNUM <= regno && regno <= NPC_REGNUM))
 158         in_fp_regs = 0;
 159       else
 160         in_gp_regs = 0;
 161     }
 162   if (in_gp_regs)
 163     {
 164       bcopy (&registers[REGISTER_BYTE (G0_REGNUM)],
 165              &sparc_greg_packet[SPARC_R_G0], 32 * SPARC_GREG_SIZE);
 166       bcopy (&registers[REGISTER_BYTE (Y_REGNUM)],
 167              &sparc_greg_packet[SPARC_R_Y], 6 * SPARC_GREG_SIZE);
 168
 169       net_write_registers (sparc_greg_packet, SPARC_GREG_PLEN, PTRACE_SETREGS);
 170
 171       /* If this is a local or in register, or we're storing all
 172          registers, update the register window spill area.  */
 173
 174       if (regno < 0 || (L0_REGNUM <= regno && regno <= I7_REGNUM))
 175         {
 176           sp = extract_address (&registers[REGISTER_BYTE (SP_REGNUM)],
 177                                 REGISTER_RAW_SIZE (CORE_ADDR));
 178           write_memory (sp, &registers[REGISTER_BYTE (L0_REGNUM)],
 179                         16 * REGISTER_RAW_SIZE (L0_REGNUM));
 180         }
 181     }
 182
 183   /* Store floating point registers if the target has them.  */
 184
 185   if (in_fp_regs && target_has_fp)
 186     {
 187       bcopy (&registers[REGISTER_BYTE (FP0_REGNUM)],
 188              &sparc_fpreg_packet[SPARC_R_FP0], 32 * SPARC_FPREG_SIZE);
 189       bcopy (&registers[REGISTER_BYTE (FPS_REGNUM)],
 190              &sparc_fpreg_packet[SPARC_R_FSR], 1 * SPARC_FPREG_SIZE);
 191
 192       net_write_registers (sparc_fpreg_packet, SPARC_FPREG_PLEN,
 193                            PTRACE_SETFPREGS);
 194     }
 195 }