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 (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 (int regno)
 126 {
 127   kern_return_t ret;
 128   thread_state_data_t state;
 129   unsigned int stateCnt = NS532_COMBINED_STATE_COUNT;
 130   register int index;
 131
 132   if (!MACH_PORT_VALID (current_thread))
 133     error ("store inferior registers: Invalid thread");
 134
 135   if (must_suspend_thread)
 136     setup_thread (current_thread, 1);
 137
 138   /* Fetch the state of the current thread */
 139   ret = thread_get_state (current_thread,
 140                           NS532_COMBINED_STATE,
 141                           state,
 142                           &stateCnt);
 143
 144   if (ret != KERN_SUCCESS)
 145     {
 146       warning ("store_inferior_registers (get): %s",
 147                mach_error_string (ret));
 148       if (must_suspend_thread)
 149         setup_thread (current_thread, 0);
 150       return;
 151     }
 152
 153   /* move gdb's registers to thread's state
 154
 155    * Since we save all registers anyway, save the ones
 156    * that gdb thinks are valid (e.g. ignore the regno
 157    * parameter)
 158    */
 159 #if 0
 160   if (regno != -1)
 161     STORE_REGS (state, regno, 1);
 162   else
 163 #endif
 164     {
 165       for (index = 0; index < NUM_REGS; index++)
 166         STORE_REGS (state, index, 1);
 167     }
 168
 169   /* Write gdb's current view of register to the thread
 170    */
 171   ret = thread_set_state (current_thread,
 172                           NS532_COMBINED_STATE,
 173                           state,
 174                           NS532_COMBINED_STATE_COUNT);
 175
 176   if (ret != KERN_SUCCESS)
 177     warning ("store_inferior_registers (set): %s",
 178              mach_error_string (ret));
 179
 180   if (must_suspend_thread)
 181     setup_thread (current_thread, 0);
 182 }