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,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include "defs.h"
  22 #include "inferior.h"
  23
  24 #include <stdio.h>
  25
  26 #include <mach.h>
  27 #include <mach/message.h>
  28 #include <mach/exception.h>
  29 #include <mach_error.h>
  30
  31 #define private static
  32 \f
  33
  34 /* Find offsets to thread states at compile time.
  35  * If your compiler does not grok this, calculate offsets
  36  * offsets yourself and use them (or get a compatible compiler :-)
  37  */
  38
  39 #define  REG_N_OFFSET(reg) (int)(&((struct ns532_combined_state *)0)->ts.reg)
  40 #define  REG_F_OFFSET(reg) (int)(&((struct ns532_combined_state *)0)->fs.reg)
  41
  42 /* at reg_offset[i] is the offset to the ns532_combined_state
  43  * location where the gdb registers[i] is stored.
  44  */
  45
  46 static int reg_offset[] =
  47 {
  48   REG_N_OFFSET (r0), REG_N_OFFSET (r1), REG_N_OFFSET (r2), REG_N_OFFSET (r3),
  49   REG_N_OFFSET (r4), REG_N_OFFSET (r5), REG_N_OFFSET (r6), REG_N_OFFSET (r7),
  50   REG_F_OFFSET (l0a), REG_F_OFFSET (l0b), REG_F_OFFSET (l2a), REG_F_OFFSET (l2b),
  51   REG_F_OFFSET (l4a), REG_F_OFFSET (l4b), REG_F_OFFSET (l6a), REG_F_OFFSET (l6b),
  52 REG_N_OFFSET (sp), REG_N_OFFSET (fp), REG_N_OFFSET (pc), REG_N_OFFSET (psr),
  53   REG_F_OFFSET (fsr),
  54   REG_F_OFFSET (l0a), REG_F_OFFSET (l1a), REG_F_OFFSET (l2a), REG_F_OFFSET (l3a),
  55   REG_F_OFFSET (l4a), REG_F_OFFSET (l5a), REG_F_OFFSET (l6a), REG_F_OFFSET (l7a),
  56 };
  57
  58 #define REG_ADDRESS(state,regnum) ((char *)(state)+reg_offset[regnum])
  59
  60 /* Fetch COUNT contiguous registers from thread STATE starting from REGNUM
  61  * Caller knows that the regs handled in one transaction are of same size.
  62  */
  63 #define FETCH_REGS(state, regnum, count) \
  64   memcpy (&registers[REGISTER_BYTE (regnum)], \
  65           (char *)state+reg_offset[ regnum ], \
  66           count*REGISTER_SIZE)
  67
  68 /* Store COUNT contiguous registers to thread STATE starting from REGNUM */
  69 #define STORE_REGS(state, regnum, count) \
  70   memcpy ((char *)state+reg_offset[ regnum ], \
  71           &registers[REGISTER_BYTE (regnum)], \
  72           count*REGISTER_SIZE)
  73 \f
  74 /*
  75  * Fetch inferiors registers for gdb.
  76  * REGNO specifies which (as gdb views it) register, -1 for all.
  77  */
  78
  79 void
  80 fetch_inferior_registers (regno)
  81      int regno;
  82 {
  83   kern_return_t ret;
  84   thread_state_data_t state;
  85   unsigned int stateCnt = NS532_COMBINED_STATE_COUNT;
  86   int index;
  87
  88   if (!MACH_PORT_VALID (current_thread))
  89     error ("fetch inferior registers: Invalid thread");
  90
  91   if (must_suspend_thread)
  92     setup_thread (current_thread, 1);
  93
  94   ret = thread_get_state (current_thread,
  95                           NS532_COMBINED_STATE,
  96                           state,
  97                           &stateCnt);
  98
  99   if (ret != KERN_SUCCESS)
 100     warning ("fetch_inferior_registers: %s ",
 101              mach_error_string (ret));
 102 #if 0
 103   /* It may be more effective to store validate all of them,
 104    * since we fetched them all anyway
 105    */
 106   else if (regno != -1)
 107     supply_register (regno, (char *) state + reg_offset[regno]);
 108 #endif
 109   else
 110     {
 111       for (index = 0; index < NUM_REGS; index++)
 112         supply_register (index, (char *) state + reg_offset[index]);
 113     }
 114
 115   if (must_suspend_thread)
 116     setup_thread (current_thread, 0);
 117 }
 118 \f
 119 /* Store our register values back into the inferior.
 120  * If REGNO is -1, do this for all registers.
 121  * Otherwise, REGNO specifies which register
 122  *
 123  * On mach3 all registers are always saved in one call.
 124  */
 125 void
 126 store_inferior_registers (regno)
 127      int regno;
 128 {
 129   kern_return_t ret;
 130   thread_state_data_t state;
 131   unsigned int stateCnt = NS532_COMBINED_STATE_COUNT;
 132   register int index;
 133
 134   if (!MACH_PORT_VALID (current_thread))
 135     error ("store inferior registers: Invalid thread");
 136
 137   if (must_suspend_thread)
 138     setup_thread (current_thread, 1);
 139
 140   /* Fetch the state of the current thread */
 141   ret = thread_get_state (current_thread,
 142                           NS532_COMBINED_STATE,
 143                           state,
 144                           &stateCnt);
 145
 146   if (ret != KERN_SUCCESS)
 147     {
 148       warning ("store_inferior_registers (get): %s",
 149                mach_error_string (ret));
 150       if (must_suspend_thread)
 151         setup_thread (current_thread, 0);
 152       return;
 153     }
 154
 155   /* move gdb's registers to thread's state
 156
 157    * Since we save all registers anyway, save the ones
 158    * that gdb thinks are valid (e.g. ignore the regno
 159    * parameter)
 160    */
 161 #if 0
 162   if (regno != -1)
 163     STORE_REGS (state, regno, 1);
 164   else
 165 #endif
 166     {
 167       for (index = 0; index < NUM_REGS; index++)
 168         STORE_REGS (state, index, 1);
 169     }
 170
 171   /* Write gdb's current view of register to the thread
 172    */
 173   ret = thread_set_state (current_thread,
 174                           NS532_COMBINED_STATE,
 175                           state,
 176                           NS532_COMBINED_STATE_COUNT);
 177
 178   if (ret != KERN_SUCCESS)
 179     warning ("store_inferior_registers (set): %s",
 180              mach_error_string (ret));
 181
 182   if (must_suspend_thread)
 183     setup_thread (current_thread, 0);
 184 }