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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSScoreExceptionMapping
*
* @brief AArch64 machine exception to POSIX signal mapping.
*/
/*
* Copyright (C) 2021 On-Line Applications Research Corporation (OAR)
* Written by Kinsey Moore <kinsey.moore@oarcorp.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <pthread.h>
#include <signal.h>
#include <rtems/score/exception.h>
#include <rtems/score/thread.h>
#include <rtems/score/threadimpl.h>
static _Thread_local int raise_signal;
static _Thread_local Thread_Action _Exception_Raise_signal_action;
static void _Exception_Raise_handler(
Thread_Control *executing,
Thread_Action *action,
ISR_lock_Context *lock_context
)
{
_Thread_State_release( executing, lock_context );
raise( raise_signal );
_Thread_State_acquire( executing, lock_context );
}
/*
* Exception handler. Map the exception class to SIGFPE, SIGSEGV
* or SIGILL for Ada or other runtimes.
*/
void _Exception_Raise_signal(
Internal_errors_Source source,
bool always_set_to_false,
Internal_errors_t code
)
{
CPU_Exception_frame *ef;
Per_CPU_Control *cpu_self = _Per_CPU_Get();
bool system_up;
if ( source != RTEMS_FATAL_SOURCE_EXCEPTION ) {
return;
}
/* If the CPU isn't UP yet, there isn't anything to send a signal to */
#ifdef RTEMS_SMP
system_up = ( _Per_CPU_Get_state( cpu_self ) == PER_CPU_STATE_UP );
#else
system_up = ( _System_state_Get() == SYSTEM_STATE_UP );
#endif
if ( !system_up ) {
return;
}
ef = (rtems_exception_frame *) code;
raise_signal = _CPU_Exception_frame_get_signal( ef );
if ( raise_signal < 0 ) {
return;
}
_Thread_Add_post_switch_action(
_Per_CPU_Get_executing( cpu_self ),
&_Exception_Raise_signal_action,
_Exception_Raise_handler
);
/* Disable thread dispatch so that dispatch can occur */
_CPU_Exception_disable_thread_dispatch();
/* Perform dispatch and resume execution */
_CPU_Exception_dispatch_and_resume( ef );
}
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