50 lines
1.8 KiB
C
50 lines
1.8 KiB
C
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/* The system call that is implemented in this file:
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* SYS_SIGCTL # signal handling functionality
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*
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* The parameters and types for this system call are:
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* SIG_REQUEST # request to perform (long)
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* SIG_PROC # process to signal/ pending (int)
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* SIG_CTXT_PTR # pointer to sigcontext structure (pointer)
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* SIG_FLAGS # flags for S_SIGRETURN call (int)
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* SIG_MAP # bit map with pending signals (long)
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* SIG_NUMBER # signal number to send to process (int)
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*
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* Supported request types are in the parameter SIG_REQUEST:
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* S_GETSIG # get a pending kernel signal
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* S_ENDSIG # signal has been processed
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* S_SENDSIG # deliver a POSIX-style signal
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* S_SIGRETURN # return from a POSIX-style signal
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* S_KILL # send a signal to a process
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*/
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#include "../system.h"
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#include <signal.h>
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#include <sys/sigcontext.h>
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#if USE_ENDKSIG
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/*===========================================================================*
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* do_endksig *
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*===========================================================================*/
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PUBLIC int do_endksig(m_ptr)
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message *m_ptr; /* pointer to request message */
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{
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/* Finish up after a kernel type signal, caused by a SYS_KILL message or a
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* call to cause_sig by a task. This is called by the PM after processing a
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* signal it got with SYS_GETKSIG.
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*/
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register struct proc *rp;
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rp = proc_addr(m_ptr->SIG_PROC);
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if (isemptyp(rp)) return(EINVAL); /* process already dead? */
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/* PM has finished one kernel signal. Perhaps process is ready now? */
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if (! (rp->p_rts_flags & SIGNALED)) /* new signal arrived */
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if ((rp->p_rts_flags &= ~SIG_PENDING)==0) /* remove pending flag */
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lock_ready(rp); /* ready if no flags */
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return(OK);
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}
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#endif /* USE_ENDKSIG */
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