1#include <sys/mman.h>
2#include <fcntl.h>
3#include <sys/stat.h>
4#include "syscall.h"
5
6void *__mmap(void *, size_t, int, int, int, off_t);
7
8const char unsigned *__map_file(const char *pathname, size_t *size)
9{
10	struct stat st;
11	const unsigned char *map = MAP_FAILED;
12	int fd = __sys_open(pathname, O_RDONLY|O_CLOEXEC|O_NONBLOCK);
13	if (fd < 0) return 0;
14	if (!__syscall(SYS_fstat, fd, &st)) {
15		map = __mmap(0, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
16		*size = st.st_size;
17	}
18	__syscall(SYS_close, fd);
19	return map == MAP_FAILED ? 0 : map;
20}
21