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/*
* Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
* All rights reserved.
*
* 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.
* 3. Neither the name of Hyra nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* 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 <sys/proc.h>
#include <sys/sched.h>
#include <sys/cdefs.h>
#include <sys/syslog.h>
#include <sys/signal.h>
#include <dev/vcons/vcons.h>
#include <string.h>
__MODULE_NAME("kern_signal");
__KERNEL_META("$Hyra$: kern_signal.c, Ian Marco Moffett, "
"Signal handling code");
static void
signal_log(const char *s)
{
vcons_putstr(&g_syslog_screen, s, strlen(s));
}
/*
* Handle any signals within the current thread
*
* TODO: Add sigaction support, default action
* for all currently is killing the process.
*/
void
signal_handle(struct proc *curtd)
{
int signo = curtd->signal;
spinlock_acquire(&curtd->lock);
if (signo == 0) {
return;
}
curtd->signal = 0;
switch (signo) {
case SIGFPE:
signal_log("Arithmetic error\n");
break;
case SIGSEGV:
signal_log("Segmentation fault\n");
break;
case SIGKILL:
signal_log("Killed\n");
break;
}
spinlock_release(&curtd->lock);
sched_exit();
}
/*
* Raise a signal for a process
*
* @to: Can be NULL to mean the current process
* @signal: Signal to send
*
* TODO: Add more functionality.
*/
void
signal_raise(struct proc *to, int signal)
{
if (to == NULL) {
to = this_td();
}
to->signal = signal;
if (to == this_td()) {
/* Current process, just preempt */
sched_context_switch(to->tf);
}
}
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