Breakpoint 1, do_config_file (filename=0xbeffdfe8 "scripts/kconfig/list.h") at scripts/basic/fixdep.c:287
287             fd = open(filename, O_RDONLY);
(gdb) step
288             if (fd < 0) {
(gdb)
293             fstat(fd, &st);
(gdb)
294             if (st.st_size == 0) {
(gdb) print st
$1 = {st_dev = 19, __pad1 = 0, st_ino = 1437053, st_mode = 33188, st_nlink = 3204440020, st_uid = 0, st_gid = 0, st_rdev = 0, __pad2 = 0, st_size = 34732, st_blksize = 0,
  st_blocks = 0, st_atim = {tv_sec = 0, tv_nsec = -1224740864}, st_mtim = {tv_sec = -1090523132, tv_nsec = -1225900760}, st_ctim = {tv_sec = -1224740864,
    tv_nsec = -1090527276}, __unused4 = 38972, __unused5 = 37640}
(gdb) next
298             map = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
(gdb)
299             if ((long) map == -1) {
(gdb)
304             fprintf(stderr,"mapped other file %s %d\n",filename,st.st_size);
(gdb)
mapped other file scripts/kconfig/list.h 34732
306             parse_config_file(map, st.st_size);
(gdb)