#define _GNU_SOURCE
#include <sys/types.h>
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <hurd.h>
#include <hurd/sigpreempt.h>

char *c = (char*) 0xa0000000;

error_t
do_copy (struct hurd_signal_preemptor *preemptor)
{
	fprintf(stderr,"copying\n");
	memcpy(c, c+1, 999999);
	fprintf(stderr,"copied\n");
	return 0;
}

int main(int argc, char *argv[]) {
	jmp_buf buf;
	void fault(int signo, long int sigcode, struct sigcontext *scp)
	{
		fprintf(stderr,"%d %lx %p\n", signo, sigcode, scp);
		longjmp(buf, 1);
	}
	void sigfault(int signo, siginfo_t *info, void *a)
	{
		fprintf(stderr,"%d %p %p\n", signo, info, a);
		longjmp(buf, 1);
	}
	struct sigaction act = {};
	act.sa_sigaction = sigfault;
	act.sa_flags = SA_SIGINFO;
	sigaction(SIGSEGV, &act, NULL);
	if (setjmp(buf) == 0) {
		hurd_catch_signal(sigmask(SIGSEGV) | sigmask(SIGBUS),
				(unsigned long) c, (unsigned long) c+1000000,
			&do_copy, (sighandler_t) &fault);
	}
	fprintf(stderr,"done\n");
	return 0;
}