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signal: use usercopy

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Matheus
2024-06-17 19:19:51 -03:00
parent 82480a5583
commit e45b1aa911
1 changed files with 15 additions and 6 deletions
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kernel-src/sys/signal.c
+15 -6
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@@ -1,6 +1,7 @@
#include <kernel/scheduler.h>
#include <arch/signal.h>
#include <logging.h>
#include <kernel/usercopy.h>
#define ACTION_TERM 0
#define ACTION_IGN 1
@@ -373,17 +374,25 @@ bool signal_check(struct thread_t *thread, context_t *context, bool syscall, uin
}
// configure stack frame
sigframe_t *sigframe = stack;
sigframe->restorer = action->restorer;
sigframe_t sigframe;
sigframe.restorer = action->restorer;
if (altstack) {
memcpy(&sigframe->oldstack, &thread->signals.stack, sizeof(stack_t));
memcpy(&sigframe.oldstack, &thread->signals.stack, sizeof(stack_t));
memset(&thread->signals.stack, 0, sizeof(stack_t));
}
memcpy(&sigframe->oldmask, &thread->signals.mask, sizeof(sigset_t));
memcpy(&sigframe->context, context, sizeof(context_t));
memcpy(&sigframe->extracontext, &thread->extracontext, sizeof(extracontext_t));
memcpy(&sigframe.oldmask, &thread->signals.mask, sizeof(sigset_t));
memcpy(&sigframe.context, context, sizeof(context_t));
memcpy(&sigframe.extracontext, &thread->extracontext, sizeof(extracontext_t));
// TODO siginfo
if (usercopy_touser(stack, &sigframe, sizeof(sigframe_t))) {
printf("signal: bad user stack\n");
THREAD_LEAVE(thread);
PROCESS_LEAVE(proc);
interrupt_set(true);
sched_terminateprogram(SIGSEGV);
}
// configure new thread signal mask
if ((action->flags & SA_NODEFER) == 0)
SIGNAL_SETON(&thread->signals.mask, signal);