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d3a6e8215f83c3d0a8038a6d0eee2bc228b104e5 blob 365 bytes (raw)

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#include <signal.h>
#include <errno.h>
#include "syscall.h"

int sigaltstack(const stack_t *restrict ss, stack_t *restrict old)
{
	if (ss) {
		if (!(ss->ss_flags & SS_DISABLE) && ss->ss_size < MINSIGSTKSZ) {
			errno = ENOMEM;
			return -1;
		}
		if (ss->ss_flags & SS_ONSTACK) {
			errno = EINVAL;
			return -1;
		}
	}
	return syscall(SYS_sigaltstack, ss, old);
}
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