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 "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 (regno)
  80      int regno;
  81 {
  82   char sparc_greg_packet[SPARC_GREG_PLEN];
  83   char sparc_fpreg_packet[SPARC_FPREG_PLEN];
  84   CORE_ADDR sp;
  85
  86   /* Get general-purpose registers.  When copying values into
  87      registers [], don't assume that a location in registers []
  88      is properly aligned for the target data type.  */
  89
  90   net_read_registers (sparc_greg_packet, SPARC_GREG_PLEN, PTRACE_GETREGS);
  91
  92   /* Now copy the register values into registers[].
  93      Note that this code depends on the ordering of the REGNUMs
  94      as defined in "tm-sparc.h".  */
  95
  96   bcopy (&sparc_greg_packet[SPARC_R_G0],
  97          &registers[REGISTER_BYTE (G0_REGNUM)], 32 * SPARC_GREG_SIZE);
  98   bcopy (&sparc_greg_packet[SPARC_R_Y],
  99          &registers[REGISTER_BYTE (Y_REGNUM)], 6 * SPARC_GREG_SIZE);
 100
 101   /* Now write the local and in registers to the register window
 102      spill area in the frame.  VxWorks does not do this for the
 103      active frame automatically; it greatly simplifies debugging
 104      (FRAME_FIND_SAVED_REGS, in particular, depends on this).  */
 105
 106   sp = extract_address (&registers[REGISTER_BYTE (SP_REGNUM)],
 107                         REGISTER_RAW_SIZE (CORE_ADDR));
 108   write_memory (sp, &registers[REGISTER_BYTE (L0_REGNUM)],
 109                 16 * REGISTER_RAW_SIZE (L0_REGNUM));
 110
 111   /* If the target has floating point registers, fetch them.
 112      Otherwise, zero the floating point register values in
 113      registers[] for good measure, even though we might not
 114      need to.  */
 115
 116   if (target_has_fp)
 117     {
 118       net_read_registers (sparc_fpreg_packet, SPARC_FPREG_PLEN,
 119                           PTRACE_GETFPREGS);
 120       bcopy (&sparc_fpreg_packet[SPARC_R_FP0],
 121              &registers[REGISTER_BYTE (FP0_REGNUM)], 32 * SPARC_FPREG_SIZE);
 122       bcopy (&sparc_fpreg_packet[SPARC_R_FSR],
 123              &registers[REGISTER_BYTE (FPS_REGNUM)], 1 * SPARC_FPREG_SIZE);
 124     }
 125   else
 126     {
 127       bzero (&registers[REGISTER_BYTE (FP0_REGNUM)], 32 * SPARC_FPREG_SIZE);
 128       bzero (&registers[REGISTER_BYTE (FPS_REGNUM)], 1 * SPARC_FPREG_SIZE);
 129     }
 130
 131   /* Mark the register cache valid.  */
 132
 133   registers_fetched ();
 134 }
 135
 136 /* Store a register or registers into the VxWorks target.
 137    REGNO is the register to store, or -1 for all; currently,
 138    it is ignored.  FIXME look at regno to improve efficiency.  */
 139
 140 void
 141 vx_write_register (regno)
 142      int regno;
 143 {
 144   char sparc_greg_packet[SPARC_GREG_PLEN];
 145   char sparc_fpreg_packet[SPARC_FPREG_PLEN];
 146   int in_gp_regs;
 147   int in_fp_regs;
 148   CORE_ADDR sp;
 149
 150   /* Store general purpose registers.  When copying values from
 151      registers [], don't assume that a location in registers []
 152      is properly aligned for the target data type.  */
 153
 154   in_gp_regs = 1;
 155   in_fp_regs = 1;
 156   if (regno >= 0)
 157     {
 158       if ((G0_REGNUM <= regno && regno <= I7_REGNUM)
 159           || (Y_REGNUM <= regno && regno <= NPC_REGNUM))
 160         in_fp_regs = 0;
 161       else
 162         in_gp_regs = 0;
 163     }
 164   if (in_gp_regs)
 165     {
 166       bcopy (&registers[REGISTER_BYTE (G0_REGNUM)],
 167              &sparc_greg_packet[SPARC_R_G0], 32 * SPARC_GREG_SIZE);
 168       bcopy (&registers[REGISTER_BYTE (Y_REGNUM)],
 169              &sparc_greg_packet[SPARC_R_Y], 6 * SPARC_GREG_SIZE);
 170
 171       net_write_registers (sparc_greg_packet, SPARC_GREG_PLEN, PTRACE_SETREGS);
 172
 173       /* If this is a local or in register, or we're storing all
 174          registers, update the register window spill area.  */
 175
 176       if (regno < 0 || (L0_REGNUM <= regno && regno <= I7_REGNUM))
 177         {
 178           sp = extract_address (&registers[REGISTER_BYTE (SP_REGNUM)],
 179                                 REGISTER_RAW_SIZE (CORE_ADDR));
 180           write_memory (sp, &registers[REGISTER_BYTE (L0_REGNUM)],
 181                         16 * REGISTER_RAW_SIZE (L0_REGNUM));
 182         }
 183     }
 184
 185   /* Store floating point registers if the target has them.  */
 186
 187   if (in_fp_regs && target_has_fp)
 188     {
 189       bcopy (&registers[REGISTER_BYTE (FP0_REGNUM)],
 190              &sparc_fpreg_packet[SPARC_R_FP0], 32 * SPARC_FPREG_SIZE);
 191       bcopy (&registers[REGISTER_BYTE (FPS_REGNUM)],
 192              &sparc_fpreg_packet[SPARC_R_FSR], 1 * SPARC_FPREG_SIZE);
 193
 194       net_write_registers (sparc_fpreg_packet, SPARC_FPREG_PLEN,
 195                            PTRACE_SETFPREGS);
 196     }
 197 }