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/* Low level interface to ns532 running mach 3.0.
Copyright 1992, 2001 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "inferior.h"
#include "regcache.h"
#include <stdio.h>
#include <mach.h>
#include <mach/message.h>
#include <mach/exception.h>
#include <mach_error.h>
#define private static
/* Find offsets to thread states at compile time.
* If your compiler does not grok this, calculate offsets
* offsets yourself and use them (or get a compatible compiler :-)
*/
#define REG_N_OFFSET(reg) (int)(&((struct ns532_combined_state *)0)->ts.reg)
#define REG_F_OFFSET(reg) (int)(&((struct ns532_combined_state *)0)->fs.reg)
/* at reg_offset[i] is the offset to the ns532_combined_state
* location where the gdb registers[i] is stored.
*/
static int reg_offset[] =
{
REG_N_OFFSET (r0), REG_N_OFFSET (r1), REG_N_OFFSET (r2), REG_N_OFFSET (r3),
REG_N_OFFSET (r4), REG_N_OFFSET (r5), REG_N_OFFSET (r6), REG_N_OFFSET (r7),
REG_F_OFFSET (l0a), REG_F_OFFSET (l0b), REG_F_OFFSET (l2a), REG_F_OFFSET (l2b),
REG_F_OFFSET (l4a), REG_F_OFFSET (l4b), REG_F_OFFSET (l6a), REG_F_OFFSET (l6b),
REG_N_OFFSET (sp), REG_N_OFFSET (fp), REG_N_OFFSET (pc), REG_N_OFFSET (psr),
REG_F_OFFSET (fsr),
REG_F_OFFSET (l0a), REG_F_OFFSET (l1a), REG_F_OFFSET (l2a), REG_F_OFFSET (l3a),
REG_F_OFFSET (l4a), REG_F_OFFSET (l5a), REG_F_OFFSET (l6a), REG_F_OFFSET (l7a),
};
#define REG_ADDRESS(state,regnum) ((char *)(state)+reg_offset[regnum])
/* Fetch COUNT contiguous registers from thread STATE starting from REGNUM
* Caller knows that the regs handled in one transaction are of same size.
*/
#define FETCH_REGS(state, regnum, count) \
memcpy (®isters[REGISTER_BYTE (regnum)], \
(char *)state+reg_offset[ regnum ], \
count*REGISTER_SIZE)
/* Store COUNT contiguous registers to thread STATE starting from REGNUM */
#define STORE_REGS(state, regnum, count) \
memcpy ((char *)state+reg_offset[ regnum ], \
®isters[REGISTER_BYTE (regnum)], \
count*REGISTER_SIZE)
/*
* Fetch inferiors registers for gdb.
* REGNO specifies which (as gdb views it) register, -1 for all.
*/
void
fetch_inferior_registers (int regno)
{
kern_return_t ret;
thread_state_data_t state;
unsigned int stateCnt = NS532_COMBINED_STATE_COUNT;
int index;
if (!MACH_PORT_VALID (current_thread))
error ("fetch inferior registers: Invalid thread");
if (must_suspend_thread)
setup_thread (current_thread, 1);
ret = thread_get_state (current_thread,
NS532_COMBINED_STATE,
state,
&stateCnt);
if (ret != KERN_SUCCESS)
warning ("fetch_inferior_registers: %s ",
mach_error_string (ret));
#if 0
/* It may be more effective to store validate all of them,
* since we fetched them all anyway
*/
else if (regno != -1)
supply_register (regno, (char *) state + reg_offset[regno]);
#endif
else
{
for (index = 0; index < NUM_REGS; index++)
supply_register (index, (char *) state + reg_offset[index]);
}
if (must_suspend_thread)
setup_thread (current_thread, 0);
}
/* Store our register values back into the inferior.
* If REGNO is -1, do this for all registers.
* Otherwise, REGNO specifies which register
*
* On mach3 all registers are always saved in one call.
*/
void
store_inferior_registers (int regno)
{
kern_return_t ret;
thread_state_data_t state;
unsigned int stateCnt = NS532_COMBINED_STATE_COUNT;
register int index;
if (!MACH_PORT_VALID (current_thread))
error ("store inferior registers: Invalid thread");
if (must_suspend_thread)
setup_thread (current_thread, 1);
/* Fetch the state of the current thread */
ret = thread_get_state (current_thread,
NS532_COMBINED_STATE,
state,
&stateCnt);
if (ret != KERN_SUCCESS)
{
warning ("store_inferior_registers (get): %s",
mach_error_string (ret));
if (must_suspend_thread)
setup_thread (current_thread, 0);
return;
}
/* move gdb's registers to thread's state
* Since we save all registers anyway, save the ones
* that gdb thinks are valid (e.g. ignore the regno
* parameter)
*/
#if 0
if (regno != -1)
STORE_REGS (state, regno, 1);
else
#endif
{
for (index = 0; index < NUM_REGS; index++)
STORE_REGS (state, index, 1);
}
/* Write gdb's current view of register to the thread
*/
ret = thread_set_state (current_thread,
NS532_COMBINED_STATE,
state,
NS532_COMBINED_STATE_COUNT);
if (ret != KERN_SUCCESS)
warning ("store_inferior_registers (set): %s",
mach_error_string (ret));
if (must_suspend_thread)
setup_thread (current_thread, 0);
}
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