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44 lines
1.1 KiB
44 lines
1.1 KiB
#include <stdlib.h>
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#include <signal.h>
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#include <errno.h>
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#include "syscall.h"
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#include "pthread_impl.h"
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#include "libc.h"
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#include "ksigaction.h"
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void __restore(), __restore_rt();
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static pthread_t dummy(void) { return 0; }
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weak_alias(dummy, __pthread_self_def);
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int __libc_sigaction(int sig, const struct sigaction *restrict sa, struct sigaction *restrict old)
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{
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struct k_sigaction ksa;
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if (sa) {
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if ((uintptr_t)sa->sa_handler > 1UL)
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__pthread_self_def();
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ksa.handler = sa->sa_handler;
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ksa.flags = sa->sa_flags | SA_RESTORER;
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ksa.restorer = (sa->sa_flags & SA_SIGINFO) ? __restore_rt : __restore;
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memcpy(&ksa.mask, &sa->sa_mask, sizeof ksa.mask);
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}
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if (syscall(SYS_rt_sigaction, sig, sa?&ksa:0, old?&ksa:0, sizeof ksa.mask))
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return -1;
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if (old) {
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old->sa_handler = ksa.handler;
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old->sa_flags = ksa.flags;
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memcpy(&old->sa_mask, &ksa.mask, sizeof ksa.mask);
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}
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return 0;
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}
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int __sigaction(int sig, const struct sigaction *restrict sa, struct sigaction *restrict old)
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{
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if (sig-32U < 3) {
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errno = EINVAL;
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return -1;
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}
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return __libc_sigaction(sig, sa, old);
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}
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weak_alias(__sigaction, sigaction);
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