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 "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 #include <sys/time.h>           /* UTek's <rpc/rpc.h> doesn't #incl this */
  48 #include <netdb.h>
  49 #include "vx-share/ptrace.h"
  50 #include "vx-share/xdr_ptrace.h"
  51 #include "vx-share/xdr_ld.h"
  52 #include "vx-share/xdr_rdb.h"
  53 #include "vx-share/dbgRpcLib.h"
  54
  55 /* get rid of value.h if possible */
  56 #include <value.h>
  57 #include <symtab.h>
  58
  59 /* Flag set if target has fpu */
  60
  61 extern int target_has_fp;
  62
  63 /* sparc floating point format descriptor, from "sparc-tdep.c."  */
  64
  65 extern struct ext_format ext_format_sparc;
  66
  67 /* Generic register read/write routines in remote-vx.c.  */
  68
  69 extern void net_read_registers ();
  70 extern void net_write_registers ();
  71
  72 /* Read a register or registers from the VxWorks target.
  73    REGNO is the register to read, or -1 for all; currently,
  74    it is ignored.  FIXME look at regno to improve efficiency.  */
  75
  76 void
  77 vx_read_register (int regno)
  78 {
  79   char sparc_greg_packet[SPARC_GREG_PLEN];
  80   char sparc_fpreg_packet[SPARC_FPREG_PLEN];
  81   CORE_ADDR sp;
  82
  83   /* Get general-purpose registers.  When copying values into
  84      registers [], don't assume that a location in registers []
  85      is properly aligned for the target data type.  */
  86
  87   net_read_registers (sparc_greg_packet, SPARC_GREG_PLEN, PTRACE_GETREGS);
  88
  89   /* Now copy the register values into registers[].
  90      Note that this code depends on the ordering of the REGNUMs
  91      as defined in "tm-sparc.h".  */
  92
  93   bcopy (&sparc_greg_packet[SPARC_R_G0],
  94          &registers[REGISTER_BYTE (G0_REGNUM)], 32 * SPARC_GREG_SIZE);
  95   bcopy (&sparc_greg_packet[SPARC_R_Y],
  96          &registers[REGISTER_BYTE (Y_REGNUM)], 6 * SPARC_GREG_SIZE);
  97
  98   /* Now write the local and in registers to the register window
  99      spill area in the frame.  VxWorks does not do this for the
 100      active frame automatically; it greatly simplifies debugging
 101      (FRAME_FIND_SAVED_REGS, in particular, depends on this).  */
 102
 103   sp = extract_address (&registers[REGISTER_BYTE (SP_REGNUM)],
 104                         REGISTER_RAW_SIZE (CORE_ADDR));
 105   write_memory (sp, &registers[REGISTER_BYTE (L0_REGNUM)],
 106                 16 * REGISTER_RAW_SIZE (L0_REGNUM));
 107
 108   /* If the target has floating point registers, fetch them.
 109      Otherwise, zero the floating point register values in
 110      registers[] for good measure, even though we might not
 111      need to.  */
 112
 113   if (target_has_fp)
 114     {
 115       net_read_registers (sparc_fpreg_packet, SPARC_FPREG_PLEN,
 116                           PTRACE_GETFPREGS);
 117       bcopy (&sparc_fpreg_packet[SPARC_R_FP0],
 118              &registers[REGISTER_BYTE (FP0_REGNUM)], 32 * SPARC_FPREG_SIZE);
 119       bcopy (&sparc_fpreg_packet[SPARC_R_FSR],
 120              &registers[REGISTER_BYTE (FPS_REGNUM)], 1 * SPARC_FPREG_SIZE);
 121     }
 122   else
 123     {
 124       bzero (&registers[REGISTER_BYTE (FP0_REGNUM)], 32 * SPARC_FPREG_SIZE);
 125       bzero (&registers[REGISTER_BYTE (FPS_REGNUM)], 1 * SPARC_FPREG_SIZE);
 126     }
 127
 128   /* Mark the register cache valid.  */
 129
 130   registers_fetched ();
 131 }
 132
 133 /* Store a register or registers into the VxWorks target.
 134    REGNO is the register to store, or -1 for all; currently,
 135    it is ignored.  FIXME look at regno to improve efficiency.  */
 136
 137 void
 138 vx_write_register (int regno)
 139 {
 140   char sparc_greg_packet[SPARC_GREG_PLEN];
 141   char sparc_fpreg_packet[SPARC_FPREG_PLEN];
 142   int in_gp_regs;
 143   int in_fp_regs;
 144   CORE_ADDR sp;
 145
 146   /* Store general purpose registers.  When copying values from
 147      registers [], don't assume that a location in registers []
 148      is properly aligned for the target data type.  */
 149
 150   in_gp_regs = 1;
 151   in_fp_regs = 1;
 152   if (regno >= 0)
 153     {
 154       if ((G0_REGNUM <= regno && regno <= I7_REGNUM)
 155           || (Y_REGNUM <= regno && regno <= NPC_REGNUM))
 156         in_fp_regs = 0;
 157       else
 158         in_gp_regs = 0;
 159     }
 160   if (in_gp_regs)
 161     {
 162       bcopy (&registers[REGISTER_BYTE (G0_REGNUM)],
 163              &sparc_greg_packet[SPARC_R_G0], 32 * SPARC_GREG_SIZE);
 164       bcopy (&registers[REGISTER_BYTE (Y_REGNUM)],
 165              &sparc_greg_packet[SPARC_R_Y], 6 * SPARC_GREG_SIZE);
 166
 167       net_write_registers (sparc_greg_packet, SPARC_GREG_PLEN, PTRACE_SETREGS);
 168
 169       /* If this is a local or in register, or we're storing all
 170          registers, update the register window spill area.  */
 171
 172       if (regno < 0 || (L0_REGNUM <= regno && regno <= I7_REGNUM))
 173         {
 174           sp = extract_address (&registers[REGISTER_BYTE (SP_REGNUM)],
 175                                 REGISTER_RAW_SIZE (CORE_ADDR));
 176           write_memory (sp, &registers[REGISTER_BYTE (L0_REGNUM)],
 177                         16 * REGISTER_RAW_SIZE (L0_REGNUM));
 178         }
 179     }
 180
 181   /* Store floating point registers if the target has them.  */
 182
 183   if (in_fp_regs && target_has_fp)
 184     {
 185       bcopy (&registers[REGISTER_BYTE (FP0_REGNUM)],
 186              &sparc_fpreg_packet[SPARC_R_FP0], 32 * SPARC_FPREG_SIZE);
 187       bcopy (&registers[REGISTER_BYTE (FPS_REGNUM)],
 188              &sparc_fpreg_packet[SPARC_R_FSR], 1 * SPARC_FPREG_SIZE);
 189
 190       net_write_registers (sparc_fpreg_packet, SPARC_FPREG_PLEN,
 191                            PTRACE_SETFPREGS);
 192     }
 193 }