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