#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/uio.h>

int main(int argc, char *argv[])
{
	int fd = open("/dev/kmem", O_RDONLY);
	if(fd < 0) {
		perror("open");
		return -1;
	}

	int in_block = 0;
	char buffer[4096];
	for(unsigned long i = 0; i < 0xfffff000; i+= sizeof(buffer)) {
		if(lseek(fd, i, SEEK_SET) == -1) {
			continue;
		}
		if(read(fd, buffer, sizeof(buffer)) == sizeof(buffer)) {
			if(!in_block) {
				printf("block found at 0x%8.8x:", i);
				fflush(stdout);
				in_block = 1;
			}
		}
		else {
			if(in_block) {
				in_block = 0;
				printf("0x%8.8x\n", i);
				fflush(stdout);
			}
		}
	}
}