/* GDB Simulator wrapper for Or1ksim, the OpenRISC architectural simulator
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/* GDB Simulator wrapper for Or1ksim, the OpenRISC architectural simulator
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Copyright 1988-2008, Free Software Foundation, Inc.
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Copyright 1988-2008, Free Software Foundation, Inc.
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Copyright (C) 2010 Embecosm Limited
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Copyright (C) 2010 Embecosm Limited
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Contributor Jeremy Bennett <jeremy.bennett@embecosm.com>
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Contributor Jeremy Bennett <jeremy.bennett@embecosm.com>
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This file is part of GDB.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify it
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the Free
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under the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at your option)
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Software Foundation; either version 3 of the License, or (at your option)
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any later version.
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any later version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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more details.
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You should have received a copy of the GNU General Public License along
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You should have received a copy of the GNU General Public License along
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with this program. If not, see <http://www.gnu.org/licenses/>. */
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with this program. If not, see <http://www.gnu.org/licenses/>. */
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/*---------------------------------------------------------------------------*/
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/*---------------------------------------------------------------------------*/
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/* This is a wrapper for Or1ksim, suitable for use as a GDB simulator.
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/* This is a wrapper for Or1ksim, suitable for use as a GDB simulator.
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The code tries to follow the GDB coding style.
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The code tries to follow the GDB coding style.
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Commenting is Doxygen compatible. */
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Commenting is Doxygen compatible. */
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/*---------------------------------------------------------------------------*/
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/*---------------------------------------------------------------------------*/
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#include <errno.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdio.h>
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#include <signal.h>
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#include <signal.h>
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#include <sys/socket.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <sys/types.h>
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#include <sys/un.h>
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#include <sys/un.h>
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#include <unistd.h>
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#include <unistd.h>
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#include "ansidecl.h"
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#include "ansidecl.h"
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#include "gdb/callback.h"
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#include "gdb/callback.h"
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#include "gdb/remote-sim.h"
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#include "gdb/remote-sim.h"
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#include "sim-utils.h"
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#include "sim-utils.h"
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#include "targ-vals.h"
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#include "targ-vals.h"
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#include "or1ksim.h"
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#include "or1ksim.h"
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#include "or32sim.h"
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#include "or32sim.h"
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/*!A global record of the simulator description */
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/*!A global record of the simulator description */
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static SIM_DESC global_sd = NULL;
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static SIM_DESC global_sd = NULL;
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/*!The last reason we stopped */
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/*!The last reason we stopped */
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enum sim_stop last_reason = sim_running;
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enum sim_stop last_reason = sim_running;
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/*!The last return code from a resume/step call */
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/*!The last return code from a resume/step call */
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static unsigned long int last_rc = 0;
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static unsigned long int last_rc = 0;
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/* ------------------------------------------------------------------------- */
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/* ------------------------------------------------------------------------- */
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/*!Create a fully initialized simulator instance.
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/*!Create a fully initialized simulator instance.
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This function is called when the simulator is selected from the gdb command
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This function is called when the simulator is selected from the gdb command
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line.
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line.
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While the simulator configuration can be parameterized by (in decreasing
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While the simulator configuration can be parameterized by (in decreasing
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precedence) argv's SIM-OPTION, argv's TARGET-PROGRAM and the abfd argument,
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precedence) argv's SIM-OPTION, argv's TARGET-PROGRAM and the abfd argument,
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the successful creation of the simulator shall not dependent on the
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the successful creation of the simulator shall not dependent on the
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presence of any of these arguments/options.
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presence of any of these arguments/options.
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For a hardware simulator the created simulator shall be sufficiently
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For a hardware simulator the created simulator shall be sufficiently
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initialized to handle, without restrictions any client requests (including
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initialized to handle, without restrictions any client requests (including
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memory reads/writes, register fetch/stores and a resume).
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memory reads/writes, register fetch/stores and a resume).
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For a process simulator, the process is not created until a call to
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For a process simulator, the process is not created until a call to
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sim_create_inferior.
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sim_create_inferior.
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This function creates a socket pair, which will be used to communicate to
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This function creates a socket pair, which will be used to communicate to
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and from the process model, then forks off a process to run the SystemC
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and from the process model, then forks off a process to run the SystemC
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model. Communication is via RSP packets across the socket pair, but with
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model. Communication is via RSP packets across the socket pair, but with
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simplified hand-shaking.
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simplified hand-shaking.
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@note We seem to capable of being called twice. We use the static
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@note We seem to capable of being called twice. We use the static
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"global_sd" variable to keep track of this. Second and subsequent
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"global_sd" variable to keep track of this. Second and subsequent
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calls do nothing, but return the previously opened simulator
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calls do nothing, but return the previously opened simulator
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description.
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description.
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@param[in] kind Specifies how the simulator shall be used. Currently
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@param[in] kind Specifies how the simulator shall be used. Currently
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there are only two kinds: stand-alone and debug.
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there are only two kinds: stand-alone and debug.
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@param[in] callback Specifies a standard host callback (defined in
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@param[in] callback Specifies a standard host callback (defined in
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callback.h).
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callback.h).
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@param[in] abfd When non NULL, designates a target program. The
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@param[in] abfd When non NULL, designates a target program. The
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program is not loaded.
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program is not loaded.
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@param[in] argv A standard ARGV pointer such as that passed from the
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@param[in] argv A standard ARGV pointer such as that passed from the
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command line. The syntax of the argument list is is
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command line. The syntax of the argument list is is
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assumed to be ``SIM-PROG { SIM-OPTION } [
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assumed to be ``SIM-PROG { SIM-OPTION } [
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TARGET-PROGRAM { TARGET-OPTION } ]''.
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TARGET-PROGRAM { TARGET-OPTION } ]''.
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The trailing TARGET-PROGRAM and args are only valid
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The trailing TARGET-PROGRAM and args are only valid
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for a stand-alone simulator.
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for a stand-alone simulator.
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The argument list is null terminated!
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The argument list is null terminated!
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@return On success, the result is a non NULL descriptor that shall be
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@return On success, the result is a non NULL descriptor that shall be
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passed to the other sim_foo functions. */
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passed to the other sim_foo functions. */
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/* ------------------------------------------------------------------------- */
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/* ------------------------------------------------------------------------- */
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SIM_DESC
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SIM_DESC
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sim_open (SIM_OPEN_KIND kind,
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sim_open (SIM_OPEN_KIND kind,
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struct host_callback_struct *callback,
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struct host_callback_struct *callback,
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struct bfd *abfd,
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struct bfd *abfd,
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char *argv[])
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char *argv[])
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{
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{
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int argc;
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int argc;
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char *config_file;
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char *config_file;
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char *image_file;
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char *image_file;
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/* If the global_sd is currently set, we just return it. */
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/* If the global_sd is currently set, we just return it. */
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if (NULL != global_sd)
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if (NULL != global_sd)
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{
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{
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return global_sd;
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return global_sd;
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}
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}
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/* Eventually we should use the option parser built into the GDB simulator
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/* Eventually we should use the option parser built into the GDB simulator
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(see common/sim-options.h). However since this is minimally documented,
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(see common/sim-options.h). However since this is minimally documented,
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and we have only the one option, for now we do it ourselves. */
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and we have only the one option, for now we do it ourselves. */
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/* Count the number of arguments */
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/* Count the number of arguments */
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for (argc = 0; NULL != argv[argc]; argc++)
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for (argc = 0; NULL != argv[argc]; argc++)
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{
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{
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/* printf ("argv[%d] = %s\n", argc, argv[argc]); */
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/* printf ("argv[%d] = %s\n", argc, argv[argc]); */
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}
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}
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/* Configuration file may be passed using the -f <filename> */
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/* Configuration file may be passed using the -f <filename> */
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if ((argc > 2) && (0 == strcmp (argv[1], "-f")))
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if ((argc > 2) && (0 == strcmp (argv[1], "-f")))
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{
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{
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config_file = argv[2];
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config_file = argv[2];
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image_file = argc > 3 ? argv[3] : NULL;
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image_file = argc > 3 ? argv[3] : NULL;
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}
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}
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else
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else
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{
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{
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config_file = NULL;
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config_file = NULL;
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image_file = argc > 1 ? argv[1] : NULL;
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image_file = argc > 1 ? argv[1] : NULL;
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}
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}
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/* Initialize the simulator. No class image nor upcalls */
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/* Initialize the simulator. No class image nor upcalls */
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if (0 == or1ksim_init (config_file, image_file, NULL, NULL, NULL))
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if (0 == or1ksim_init (config_file, image_file, NULL, NULL, NULL))
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{
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{
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global_sd = (SIM_DESC) malloc (sizeof (*global_sd));
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global_sd = (SIM_DESC) malloc (sizeof (*global_sd));
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global_sd->callback = callback;
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global_sd->callback = callback;
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global_sd->is_debug = (kind == SIM_OPEN_DEBUG);
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global_sd->is_debug = (kind == SIM_OPEN_DEBUG);
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global_sd->myname = (char *)xstrdup (argv[0]);
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global_sd->myname = (char *)xstrdup (argv[0]);
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}
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}
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return global_sd;
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return global_sd;
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} /* sim_open () */
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} /* sim_open () */
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/* ------------------------------------------------------------------------- */
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/* ------------------------------------------------------------------------- */
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/*!Destroy a simulator instance.
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/*!Destroy a simulator instance.
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This may involve freeing target memory and closing any open files and
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This may involve freeing target memory and closing any open files and
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mmap'd areas.
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mmap'd areas.
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We cannot assume sim_kill () has already been called.
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We cannot assume sim_kill () has already been called.
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@param[in] sd Simulation descriptor from sim_open ().
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@param[in] sd Simulation descriptor from sim_open ().
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@param[in] quitting Non-zero if we cannot hang on errors. */
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@param[in] quitting Non-zero if we cannot hang on errors. */
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/* ------------------------------------------------------------------------- */
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/* ------------------------------------------------------------------------- */
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void
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void
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sim_close (SIM_DESC sd,
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sim_close (SIM_DESC sd,
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int quitting)
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int quitting)
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{
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{
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if (NULL != sd)
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if (NULL != sd)
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{
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{
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free (sd->myname);
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free (sd->myname);
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free (sd);
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free (sd);
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}
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}
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} /* sim_close () */
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} /* sim_close () */
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/* ------------------------------------------------------------------------- */
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/* ------------------------------------------------------------------------- */
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/*!Load program PROG into the simulators memory.
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/*!Load program PROG into the simulators memory.
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Hardware simulator: Normally, each program section is written into
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Hardware simulator: Normally, each program section is written into
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memory according to that sections LMA using physical (direct)
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memory according to that sections LMA using physical (direct)
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addressing. The exception being systems, such as PPC/CHRP, which
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addressing. The exception being systems, such as PPC/CHRP, which
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support more complicated program loaders. A call to this function
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support more complicated program loaders. A call to this function
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should not effect the state of the processor registers. Multiple
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should not effect the state of the processor registers. Multiple
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calls to this function are permitted and have an accumulative
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calls to this function are permitted and have an accumulative
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effect.
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effect.
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Process simulator: Calls to this function may be ignored.
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Process simulator: Calls to this function may be ignored.
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@todo Most hardware simulators load the image at the VMA using
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@todo Most hardware simulators load the image at the VMA using
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virtual addressing.
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virtual addressing.
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@todo For some hardware targets, before a loaded program can be executed,
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@todo For some hardware targets, before a loaded program can be executed,
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it requires the manipulation of VM registers and tables. Such
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it requires the manipulation of VM registers and tables. Such
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manipulation should probably (?) occure in sim_create_inferior ().
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manipulation should probably (?) occure in sim_create_inferior ().
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@param[in] sd Simulation descriptor from sim_open ().
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@param[in] sd Simulation descriptor from sim_open ().
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@param[in] prog The name of the program
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@param[in] prog The name of the program
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@param[in] abfd If non-NULL, the BFD for the file has already been
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@param[in] abfd If non-NULL, the BFD for the file has already been
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opened.
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opened.
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@param[in] from_tty Not sure what this does. Probably indicates this is a
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@param[in] from_tty Not sure what this does. Probably indicates this is a
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command line load? Anyway we don't use it.
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command line load? Anyway we don't use it.
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@return A return code indicating success. */
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@return A return code indicating success. */
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/* ------------------------------------------------------------------------- */
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/* ------------------------------------------------------------------------- */
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SIM_RC
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SIM_RC
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sim_load (SIM_DESC sd,
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sim_load (SIM_DESC sd,
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char *prog,
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char *prog,
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struct bfd *abfd,
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struct bfd *abfd,
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int from_tty)
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int from_tty)
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{
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{
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bfd *prog_bfd;
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bfd *prog_bfd;
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/* Use the built in loader, which will in turn use our write function. */
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/* Use the built in loader, which will in turn use our write function. */
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prog_bfd = sim_load_file (sd, sd->myname, sd->callback, prog, abfd,
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prog_bfd = sim_load_file (sd, sd->myname, sd->callback, prog, abfd,
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sd->is_debug, 0, sim_write);
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sd->is_debug, 0, sim_write);
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if (NULL == prog_bfd)
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if (NULL == prog_bfd)
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{
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{
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return SIM_RC_FAIL;
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return SIM_RC_FAIL;
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}
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}
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/* If the BFD was not already open, then close the loaded program. */
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/* If the BFD was not already open, then close the loaded program. */
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if (NULL == abfd)
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if (NULL == abfd)
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{
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{
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bfd_close (prog_bfd);
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bfd_close (prog_bfd);
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}
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}
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return SIM_RC_OK;
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return SIM_RC_OK;
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} /* sim_load () */
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} /* sim_load () */
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/* ------------------------------------------------------------------------- */
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/* ------------------------------------------------------------------------- */
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/*!Prepare to run the simulated program.
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/*!Prepare to run the simulated program.
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Hardware simulator: This function shall initialize the processor
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Hardware simulator: This function shall initialize the processor
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registers to a known value. The program counter and possibly stack
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registers to a known value. The program counter and possibly stack
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pointer shall be set using information obtained from ABFD (or
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pointer shall be set using information obtained from ABFD (or
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hardware reset defaults). ARGV and ENV, dependant on the target
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hardware reset defaults). ARGV and ENV, dependant on the target
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ABI, may be written to memory.
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ABI, may be written to memory.
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Process simulator: After a call to this function, a new process
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Process simulator: After a call to this function, a new process
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instance shall exist. The TEXT, DATA, BSS and stack regions shall
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instance shall exist. The TEXT, DATA, BSS and stack regions shall
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all be initialized, ARGV and ENV shall be written to process
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all be initialized, ARGV and ENV shall be written to process
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address space (according to the applicable ABI) and the program
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address space (according to the applicable ABI) and the program
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counter and stack pointer set accordingly.
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counter and stack pointer set accordingly.
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ABFD, if not NULL, provides initial processor state information.
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ABFD, if not NULL, provides initial processor state information.
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ARGV and ENV, if non NULL, are NULL terminated lists of pointers.
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ARGV and ENV, if non NULL, are NULL terminated lists of pointers.
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@param[in] sd Simulation descriptor from sim_open ().
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@param[in] sd Simulation descriptor from sim_open ().
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@param[in] abfd If non-NULL provides initial processor state information.
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@param[in] abfd If non-NULL provides initial processor state information.
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@param[in] argv Vector of arguments to the program. We don't use this
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@param[in] argv Vector of arguments to the program. We don't use this
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@param[in] env Vector of environment data. We don't use this.
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@param[in] env Vector of environment data. We don't use this.
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|
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@return A return code indicating success. */
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@return A return code indicating success. */
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/* ------------------------------------------------------------------------- */
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/* ------------------------------------------------------------------------- */
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SIM_RC
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SIM_RC
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sim_create_inferior (SIM_DESC sd,
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sim_create_inferior (SIM_DESC sd,
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struct bfd *abfd,
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struct bfd *abfd,
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char **argv ATTRIBUTE_UNUSED,
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char **argv ATTRIBUTE_UNUSED,
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char **env ATTRIBUTE_UNUSED)
|
char **env ATTRIBUTE_UNUSED)
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{
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{
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/* We set the starting PC if we have that data */
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/* We set the starting PC if we have that data */
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unsigned long int pc = (NULL == abfd) ? 0 : bfd_get_start_address (abfd);
|
unsigned long int pc = (NULL == abfd) ? 0 : bfd_get_start_address (abfd);
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unsigned char *pc_ptr = (unsigned char *)(&pc);
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unsigned char *pc_ptr = (unsigned char *)(&pc);
|
|
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sim_store_register (sd, OR32_NPC_REGNUM, pc_ptr, sizeof (pc));
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sim_store_register (sd, OR32_NPC_REGNUM, pc_ptr, sizeof (pc));
|
return SIM_RC_OK;
|
return SIM_RC_OK;
|
|
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} /* sim_create_inferior () */
|
} /* sim_create_inferior () */
|
|
|
|
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/* ------------------------------------------------------------------------- */
|
/* ------------------------------------------------------------------------- */
|
/*!Fetch bytes from the simulated program's memory.
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/*!Fetch bytes from the simulated program's memory.
|
|
|
@param[in] sd Simulation descriptor from sim_open (). We don't use
|
@param[in] sd Simulation descriptor from sim_open (). We don't use
|
this.
|
this.
|
@param[in] mem The address in memory to fetch from.
|
@param[in] mem The address in memory to fetch from.
|
@param[out] buf Where to put the read data
|
@param[out] buf Where to put the read data
|
@param[in] len Number of bytes to fetch
|
@param[in] len Number of bytes to fetch
|
|
|
@return Number of bytes read, or zero if error. */
|
@return Number of bytes read, or zero if error. */
|
/* ------------------------------------------------------------------------- */
|
/* ------------------------------------------------------------------------- */
|
int
|
int
|
sim_read (SIM_DESC sd ATTRIBUTE_UNUSED,
|
sim_read (SIM_DESC sd ATTRIBUTE_UNUSED,
|
SIM_ADDR mem,
|
SIM_ADDR mem,
|
unsigned char *buf,
|
unsigned char *buf,
|
int len)
|
int len)
|
{
|
{
|
return or1ksim_read_mem (buf, (unsigned int) mem, len);
|
return or1ksim_read_mem (buf, (unsigned int) mem, len);
|
|
|
} /* sim_read () */
|
} /* sim_read () */
|
|
|
|
|
/* ------------------------------------------------------------------------- */
|
/* ------------------------------------------------------------------------- */
|
/*!Store bytes to the simulated program's memory.
|
/*!Store bytes to the simulated program's memory.
|
|
|
@param[in] sd Simulation descriptor from sim_open (). We don't use
|
@param[in] sd Simulation descriptor from sim_open (). We don't use
|
this.
|
this.
|
@param[in] mem The address in memory to write to.
|
@param[in] mem The address in memory to write to.
|
@param[in] buf The data to write
|
@param[in] buf The data to write
|
@param[in] len Number of bytes to write
|
@param[in] len Number of bytes to write
|
|
|
@return Number of byte written, or zero if error. */
|
@return Number of byte written, or zero if error. */
|
/* ------------------------------------------------------------------------- */
|
/* ------------------------------------------------------------------------- */
|
int
|
int
|
sim_write (SIM_DESC sd ATTRIBUTE_UNUSED,
|
sim_write (SIM_DESC sd ATTRIBUTE_UNUSED,
|
SIM_ADDR mem,
|
SIM_ADDR mem,
|
unsigned char *buf,
|
unsigned char *buf,
|
int len)
|
int len)
|
{
|
{
|
return or1ksim_write_mem (buf, (unsigned int) mem, len);
|
return or1ksim_write_mem (buf, (unsigned int) mem, len);
|
|
|
} /* sim_write () */
|
} /* sim_write () */
|
|
|
|
|
/* ------------------------------------------------------------------------- */
|
/* ------------------------------------------------------------------------- */
|
/*!Fetch a register from the simulation
|
/*!Fetch a register from the simulation
|
|
|
@param[in] sd Simulation descriptor from sim_open (). We don't use
|
@param[in] sd Simulation descriptor from sim_open (). We don't use
|
this.
|
this.
|
@param[in] regno The register to fetch
|
@param[in] regno The register to fetch
|
@param[out] buf Buffer of length bytes to store the result. Data is
|
@param[out] buf Buffer of length bytes to store the result. Data is
|
only transferred if length matches the register length
|
only transferred if length matches the register length
|
(the actual register size is still returned).
|
(the actual register size is still returned).
|
@param[in] len Size of buf, which should match the size of the
|
@param[in] len Size of buf, which should match the size of the
|
register.
|
register.
|
|
|
@return The actual size of the register, or zero if regno is not
|
@return The actual size of the register, or zero if regno is not
|
applicable. Legacy implementations return -1.
|
applicable. Legacy implementations return -1.
|
/* ------------------------------------------------------------------------- */
|
/* ------------------------------------------------------------------------- */
|
int
|
int
|
sim_fetch_register (SIM_DESC sd ATTRIBUTE_UNUSED,
|
sim_fetch_register (SIM_DESC sd ATTRIBUTE_UNUSED,
|
int regno,
|
int regno,
|
unsigned char *buf,
|
unsigned char *buf,
|
int len)
|
int len)
|
{
|
{
|
return or1ksim_read_reg (buf, regno, len);
|
return or1ksim_read_reg (buf, regno, len);
|
|
|
} /* sim_fetch_register () */
|
} /* sim_fetch_register () */
|
|
|
|
|
/* ------------------------------------------------------------------------- */
|
/* ------------------------------------------------------------------------- */
|
/*!Store a register to the simulation
|
/*!Store a register to the simulation
|
|
|
@param[in] sd Simulation descriptor from sim_open (). We don't use
|
@param[in] sd Simulation descriptor from sim_open (). We don't use
|
this.
|
this.
|
@param[in] regno The register to store
|
@param[in] regno The register to store
|
@param[in] buf Buffer of length bytes with the data to store. Data is
|
@param[in] buf Buffer of length bytes with the data to store. Data is
|
only transferred if length matches the register length
|
only transferred if length matches the register length
|
(the actual register size is still returned).
|
(the actual register size is still returned).
|
@param[in] len Size of buf, which should match the size of the
|
@param[in] len Size of buf, which should match the size of the
|
register.
|
register.
|
|
|
@return The actual size of the register, or zero if regno is not
|
@return The actual size of the register, or zero if regno is not
|
applicable. Legacy implementations return -1.
|
applicable. Legacy implementations return -1.
|
/* ------------------------------------------------------------------------- */
|
/* ------------------------------------------------------------------------- */
|
int
|
int
|
sim_store_register (SIM_DESC sd ATTRIBUTE_UNUSED,
|
sim_store_register (SIM_DESC sd ATTRIBUTE_UNUSED,
|
int regno,
|
int regno,
|
unsigned char *buf,
|
unsigned char *buf,
|
int len)
|
int len)
|
{
|
{
|
return or1ksim_write_reg (buf, regno, len);
|
return or1ksim_write_reg (buf, regno, len);
|
|
|
} /* sim_store_register () */
|
} /* sim_store_register () */
|
|
|
|
|
/* ------------------------------------------------------------------------- */
|
/* ------------------------------------------------------------------------- */
|
/* Print whatever statistics the simulator has collected.
|
/* Print whatever statistics the simulator has collected.
|
|
|
@param[in] sd Simulation descriptor from sim_open (). We don't use
|
@param[in] sd Simulation descriptor from sim_open (). We don't use
|
this.
|
this.
|
@param[in] verbose Currently unused, and should always be zero. */
|
@param[in] verbose Currently unused, and should always be zero. */
|
/* ------------------------------------------------------------------------- */
|
/* ------------------------------------------------------------------------- */
|
void
|
void
|
sim_info (SIM_DESC sd ATTRIBUTE_UNUSED,
|
sim_info (SIM_DESC sd ATTRIBUTE_UNUSED,
|
int verbose ATTRIBUTE_UNUSED)
|
int verbose ATTRIBUTE_UNUSED)
|
{
|
{
|
} /* sim_info () */
|
} /* sim_info () */
|
|
|
|
|
/* ------------------------------------------------------------------------- */
|
/* ------------------------------------------------------------------------- */
|
/*!Run (or resume) the simulated program.
|
/*!Run (or resume) the simulated program.
|
|
|
Hardware simulator: If the SIGRC value returned by
|
Hardware simulator: If the SIGRC value returned by
|
sim_stop_reason() is passed back to the simulator via siggnal then
|
sim_stop_reason() is passed back to the simulator via siggnal then
|
the hardware simulator shall correctly deliver the hardware event
|
the hardware simulator shall correctly deliver the hardware event
|
indicated by that signal. If a value of zero is passed in then the
|
indicated by that signal. If a value of zero is passed in then the
|
simulation will continue as if there were no outstanding signal.
|
simulation will continue as if there were no outstanding signal.
|
The effect of any other siggnal value is is implementation
|
The effect of any other siggnal value is is implementation
|
dependant.
|
dependant.
|
|
|
Process simulator: If SIGRC is non-zero then the corresponding
|
Process simulator: If SIGRC is non-zero then the corresponding
|
signal is delivered to the simulated program and execution is then
|
signal is delivered to the simulated program and execution is then
|
continued. A zero SIGRC value indicates that the program should
|
continued. A zero SIGRC value indicates that the program should
|
continue as normal.
|
continue as normal.
|
|
|
@param[in] sd Simulation descriptor from sim_open ().
|
@param[in] sd Simulation descriptor from sim_open ().
|
@param[in] step When non-zero indicates that only a single simulator
|
@param[in] step When non-zero indicates that only a single simulator
|
cycle should be emulated.
|
cycle should be emulated.
|
@param[in] siggnal If non-zero is a (HOST) SIGRC value indicating the type
|
@param[in] siggnal If non-zero is a (HOST) SIGRC value indicating the type
|
of event (hardware interrupt, signal) to be delivered
|
of event (hardware interrupt, signal) to be delivered
|
to the simulated program. */
|
to the simulated program. */
|
/* ------------------------------------------------------------------------- */
|
/* ------------------------------------------------------------------------- */
|
void
|
void
|
sim_resume (SIM_DESC sd,
|
sim_resume (SIM_DESC sd,
|
int step,
|
int step,
|
int siggnal)
|
int siggnal)
|
{
|
{
|
int res;
|
int res;
|
|
|
res = step ? or1ksim_step () : or1ksim_run (-1.0);
|
res = step ? or1ksim_step () : or1ksim_run (-1.0);
|
|
|
switch (res)
|
switch (res)
|
{
|
{
|
case OR1KSIM_RC_HALTED:
|
case OR1KSIM_RC_HALTED:
|
last_reason = sim_exited;
|
last_reason = sim_exited;
|
(void) sim_fetch_register (sd, OR32_FIRST_ARG_REGNUM,
|
(void) sim_fetch_register (sd, OR32_FIRST_ARG_REGNUM,
|
(unsigned char *) &last_rc, 4);
|
(unsigned char *) &last_rc, 4);
|
break;
|
break;
|
|
|
case OR1KSIM_RC_BRKPT:
|
case OR1KSIM_RC_BRKPT:
|
last_reason = sim_stopped;
|
last_reason = sim_stopped;
|
last_rc = TARGET_SIGNAL_TRAP;
|
last_rc = TARGET_SIGNAL_TRAP;
|
break;
|
break;
|
}
|
}
|
} /* sim_resume () */
|
} /* sim_resume () */
|
|
|
|
|
/* ------------------------------------------------------------------------- */
|
/* ------------------------------------------------------------------------- */
|
/*!Asynchronous request to stop the simulation.
|
/*!Asynchronous request to stop the simulation.
|
|
|
@param[in] sd Simulation descriptor from sim_open (). We don't use this.
|
@param[in] sd Simulation descriptor from sim_open (). We don't use this.
|
|
|
@return Non-zero indicates that the simulator is able to handle the
|
@return Non-zero indicates that the simulator is able to handle the
|
request. */
|
request. */
|
/* ------------------------------------------------------------------------- */
|
/* ------------------------------------------------------------------------- */
|
int sim_stop (SIM_DESC sd ATTRIBUTE_UNUSED)
|
int sim_stop (SIM_DESC sd ATTRIBUTE_UNUSED)
|
{
|
{
|
return 0; /* We don't support this */
|
return 0; /* We don't support this */
|
|
|
} /* sim_stop () */
|
} /* sim_stop () */
|
|
|
|
|
/* ------------------------------------------------------------------------- */
|
/* ------------------------------------------------------------------------- */
|
/*!Fetch the REASON why the program stopped.
|
/*!Fetch the REASON why the program stopped.
|
|
|
The reason enumeration indicates why:
|
The reason enumeration indicates why:
|
|
|
- sim_exited: The program has terminated. sigrc indicates the target
|
- sim_exited: The program has terminated. sigrc indicates the target
|
dependant exit status.
|
dependant exit status.
|
|
|
- sim_stopped: The program has stopped. sigrc uses the host's signal
|
- sim_stopped: The program has stopped. sigrc uses the host's signal
|
numbering as a way of identifying the reaon: program
|
numbering as a way of identifying the reaon: program
|
interrupted by user via a sim_stop request (SIGINT); a
|
interrupted by user via a sim_stop request (SIGINT); a
|
breakpoint instruction (SIGTRAP); a completed single step
|
breakpoint instruction (SIGTRAP); a completed single step
|
(SIGTRAP); an internal error condition (SIGABRT); an
|
(SIGTRAP); an internal error condition (SIGABRT); an
|
illegal instruction (SIGILL); Access to an undefined
|
illegal instruction (SIGILL); Access to an undefined
|
memory region (SIGSEGV); Mis-aligned memory access
|
memory region (SIGSEGV); Mis-aligned memory access
|
(SIGBUS).
|
(SIGBUS).
|
|
|
For some signals information in addition to the signal
|
For some signals information in addition to the signal
|
number may be retained by the simulator (e.g. offending
|
number may be retained by the simulator (e.g. offending
|
address), that information is not directly accessable via
|
address), that information is not directly accessable via
|
this interface.
|
this interface.
|
|
|
- sim_signalled: The program has been terminated by a signal. The
|
- sim_signalled: The program has been terminated by a signal. The
|
simulator has encountered target code that causes the the
|
simulator has encountered target code that causes the the
|
program to exit with signal sigrc.
|
program to exit with signal sigrc.
|
|
|
- sim_running:
|
- sim_running:
|
- sim_polling: The return of one of these values indicates a problem
|
- sim_polling: The return of one of these values indicates a problem
|
internal to the simulator.
|
internal to the simulator.
|
|
|
@param[in] sd Simulation descriptor from sim_open (). We don't use
|
@param[in] sd Simulation descriptor from sim_open (). We don't use
|
this.
|
this.
|
@param[out] reason The reason for stopping
|
@param[out] reason The reason for stopping
|
@param[out] sigrc Supplementary information for some values of reason. */
|
@param[out] sigrc Supplementary information for some values of reason. */
|
/* ------------------------------------------------------------------------- */
|
/* ------------------------------------------------------------------------- */
|
void
|
void
|
sim_stop_reason (SIM_DESC sd ATTRIBUTE_UNUSED,
|
sim_stop_reason (SIM_DESC sd ATTRIBUTE_UNUSED,
|
enum sim_stop *reason,
|
enum sim_stop *reason,
|
int *sigrc)
|
int *sigrc)
|
{
|
{
|
*reason = last_reason;
|
*reason = last_reason;
|
*sigrc = last_rc;
|
*sigrc = last_rc;
|
|
|
} /* sim_stop_reason () */
|
} /* sim_stop_reason () */
|
|
|
|
|
/* ------------------------------------------------------------------------- */
|
/* ------------------------------------------------------------------------- */
|
/* Passthru for other commands that the simulator might support.
|
/* Passthru for other commands that the simulator might support.
|
|
|
Simulators should be prepared to deal with any combination of NULL
|
Simulators should be prepared to deal with any combination of NULL
|
or empty command.
|
or empty command.
|
|
|
This implementation currently does nothing.
|
This implementation currently does nothing.
|
|
|
@param[in] sd Simulation descriptor from sim_open (). We don't use this.
|
@param[in] sd Simulation descriptor from sim_open (). We don't use this.
|
@param[in] cmd The command to pass through. */
|
@param[in] cmd The command to pass through. */
|
/* ------------------------------------------------------------------------- */
|
/* ------------------------------------------------------------------------- */
|
void
|
void
|
sim_do_command (SIM_DESC sd ATTRIBUTE_UNUSED,
|
sim_do_command (SIM_DESC sd ATTRIBUTE_UNUSED,
|
char *cmd ATTRIBUTE_UNUSED)
|
char *cmd ATTRIBUTE_UNUSED)
|
{
|
{
|
} /* sim_do_command () */
|
} /* sim_do_command () */
|
|
|
|
|
/* ------------------------------------------------------------------------- */
|
/* ------------------------------------------------------------------------- */
|
/* Set the default host_callback_struct
|
/* Set the default host_callback_struct
|
|
|
@note Deprecated, but implemented, since it is still required for linking.
|
@note Deprecated, but implemented, since it is still required for linking.
|
|
|
This implementation currently does nothing.
|
This implementation currently does nothing.
|
|
|
@param[in] ptr The host_callback_struct pointer. Unused here. */
|
@param[in] ptr The host_callback_struct pointer. Unused here. */
|
/* ------------------------------------------------------------------------- */
|
/* ------------------------------------------------------------------------- */
|
void
|
void
|
sim_set_callbacks (struct host_callback_struct *ptr ATTRIBUTE_UNUSED)
|
sim_set_callbacks (struct host_callback_struct *ptr ATTRIBUTE_UNUSED)
|
{
|
{
|
} /* sim_set_callbacks () */
|
} /* sim_set_callbacks () */
|
|
|
|
|
/* ------------------------------------------------------------------------- */
|
/* ------------------------------------------------------------------------- */
|
/* Set the size of the simulator memory array.
|
/* Set the size of the simulator memory array.
|
|
|
@note Deprecated, but implemented, since it is still required for linking.
|
@note Deprecated, but implemented, since it is still required for linking.
|
|
|
This implementation currently does nothing.
|
This implementation currently does nothing.
|
|
|
@param[in] size The memory size to use. Unused here. */
|
@param[in] size The memory size to use. Unused here. */
|
/* ------------------------------------------------------------------------- */
|
/* ------------------------------------------------------------------------- */
|
void
|
void
|
sim_size (int size ATTRIBUTE_UNUSED)
|
sim_size (int size ATTRIBUTE_UNUSED)
|
{
|
{
|
} /* sim_size () */
|
} /* sim_size () */
|
|
|
|
|
/* ------------------------------------------------------------------------- */
|
/* ------------------------------------------------------------------------- */
|
/* Single step the simulator with tracing enabled.
|
/* Single step the simulator with tracing enabled.
|
|
|
@note Deprecated, but implemented, since it is still required for linking.
|
@note Deprecated, but implemented, since it is still required for linking.
|
|
|
This implementation currently does nothing.
|
This implementation currently does nothing.
|
|
|
@param[in] sd The simulator description struct. Unused here. */
|
@param[in] sd The simulator description struct. Unused here. */
|
/* ------------------------------------------------------------------------- */
|
/* ------------------------------------------------------------------------- */
|
void
|
void
|
sim_trace (SIM_DESC sd ATTRIBUTE_UNUSED)
|
sim_trace (SIM_DESC sd ATTRIBUTE_UNUSED)
|
{
|
{
|
} /* sim_trace () */
|
} /* sim_trace () */
|
|
|
