gdb/ns32km3-nat.c

   1 /* Low level interface to ns532 running mach 3.0.
   2    Copyright (C) 1992 Free Software Foundation, Inc.
   3
   4 This file is part of GDB.
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20 #include "defs.h"
  21 #include "inferior.h"
  22
  23 #include <stdio.h>
  24
  25 #include <mach.h>
  26 #include <mach/message.h>
  27 #include <mach/exception.h>
  28 #include <mach_error.h>
  29
  30 #define private static
  31
  32 \f
  33 /* Find offsets to thread states at compile time.
  34  * If your compiler does not grok this, calculate offsets
  35  * offsets yourself and use them (or get a compatible compiler :-)
  36  */
  37
  38 #define  REG_N_OFFSET(reg) (int)(&((struct ns532_combined_state *)0)->ts.reg)
  39 #define  REG_F_OFFSET(reg) (int)(&((struct ns532_combined_state *)0)->fs.reg)
  40
  41 /* at reg_offset[i] is the offset to the ns532_combined_state
  42  * location where the gdb registers[i] is stored.
  43  */
  44
  45 static int reg_offset[] =
  46 {
  47   REG_N_OFFSET(r0),  REG_N_OFFSET(r1), REG_N_OFFSET(r2), REG_N_OFFSET(r3),
  48   REG_N_OFFSET(r4),  REG_N_OFFSET(r5), REG_N_OFFSET(r6), REG_N_OFFSET(r7),
  49   REG_F_OFFSET(l0a), REG_F_OFFSET(l0b),REG_F_OFFSET(l2a),REG_F_OFFSET(l2b),
  50   REG_F_OFFSET(l4a), REG_F_OFFSET(l4b),REG_F_OFFSET(l6a),REG_F_OFFSET(l6b),
  51   REG_N_OFFSET(sp),  REG_N_OFFSET(fp), REG_N_OFFSET(pc), REG_N_OFFSET(psr),
  52   REG_F_OFFSET(fsr),
  53   REG_F_OFFSET(l0a), REG_F_OFFSET(l1a),REG_F_OFFSET(l2a),REG_F_OFFSET(l3a),
  54   REG_F_OFFSET(l4a), REG_F_OFFSET(l5a),REG_F_OFFSET(l6a),REG_F_OFFSET(l7a),
  55 };
  56
  57 #define REG_ADDRESS(state,regnum) ((char *)(state)+reg_offset[regnum])
  58
  59 /* Fetch COUNT contiguous registers from thread STATE starting from REGNUM
  60  * Caller knows that the regs handled in one transaction are of same size.
  61  */
  62 #define FETCH_REGS(state, regnum, count) \
  63   memcpy (&registers[REGISTER_BYTE (regnum)], \
  64           (char *)state+reg_offset[ regnum ], \
  65           count*REGISTER_SIZE)
  66
  67 /* Store COUNT contiguous registers to thread STATE starting from REGNUM */
  68 #define STORE_REGS(state, regnum, count) \
  69   memcpy ((char *)state+reg_offset[ regnum ], \
  70           &registers[REGISTER_BYTE (regnum)], \
  71           count*REGISTER_SIZE)
  72 \f
  73 /*
  74  * Fetch inferiors registers for gdb.
  75  * REGNO specifies which (as gdb views it) register, -1 for all.
  76  */
  77
  78 void
  79 fetch_inferior_registers (regno)
  80      int regno;
  81 {
  82   kern_return_t ret;
  83   thread_state_data_t state;
  84   unsigned int stateCnt = NS532_COMBINED_STATE_COUNT;
  85   int index;
  86
  87   if (! MACH_PORT_VALID (current_thread))
  88     error ("fetch inferior registers: Invalid thread");
  89
  90   if (must_suspend_thread)
  91     setup_thread (current_thread, 1);
  92
  93   ret = thread_get_state (current_thread,
  94                           NS532_COMBINED_STATE,
  95                           state,
  96                           &stateCnt);
  97
  98   if (ret != KERN_SUCCESS)
  99     warning ("fetch_inferior_registers: %s ",
 100              mach_error_string (ret));
 101 #if 0
 102   /* It may be more effective to store validate all of them,
 103    * since we fetched them all anyway
 104    */
 105   else if (regno != -1)
 106     supply_register (regno, (char *)state+reg_offset[regno]);
 107 #endif
 108   else
 109     {
 110       for (index = 0; index < NUM_REGS; index++)
 111         supply_register (index, (char *)state+reg_offset[index]);
 112     }
 113
 114   if (must_suspend_thread)
 115     setup_thread (current_thread, 0);
 116 }
 117 \f
 118 /* Store our register values back into the inferior.
 119  * If REGNO is -1, do this for all registers.
 120  * Otherwise, REGNO specifies which register
 121  *
 122  * On mach3 all registers are always saved in one call.
 123  */
 124 void
 125 store_inferior_registers (regno)
 126      int regno;
 127 {
 128   kern_return_t ret;
 129   thread_state_data_t state;
 130   unsigned int stateCnt = NS532_COMBINED_STATE_COUNT;
 131   register int index;
 132
 133   if (! MACH_PORT_VALID (current_thread))
 134     error ("store inferior registers: Invalid thread");
 135
 136   if (must_suspend_thread)
 137     setup_thread (current_thread, 1);
 138
 139   /* Fetch the state of the current thread */
 140   ret = thread_get_state (current_thread,
 141                           NS532_COMBINED_STATE,
 142                           state,
 143                           &stateCnt);
 144
 145    if (ret != KERN_SUCCESS)
 146     {
 147       warning ("store_inferior_registers (get): %s",
 148                mach_error_string (ret));
 149       if (must_suspend_thread)
 150         setup_thread (current_thread, 0);
 151       return;
 152     }
 153
 154   /* move gdb's registers to thread's state
 155    *
 156    * Since we save all registers anyway, save the ones
 157    * that gdb thinks are valid (e.g. ignore the regno
 158    * parameter)
 159    */
 160 #if 0
 161   if (regno != -1)
 162     STORE_REGS (state, regno, 1);
 163   else
 164 #endif
 165     {
 166       for (index = 0; index < NUM_REGS; index++)
 167         STORE_REGS (state, index, 1);
 168     }
 169
 170   /* Write gdb's current view of register to the thread
 171    */
 172   ret = thread_set_state (current_thread,
 173                           NS532_COMBINED_STATE,
 174                           state,
 175                           NS532_COMBINED_STATE_COUNT);
 176
 177   if (ret != KERN_SUCCESS)
 178     warning ("store_inferior_registers (set): %s",
 179              mach_error_string (ret));
 180
 181   if (must_suspend_thread)
 182     setup_thread (current_thread, 0);
 183 }