diff options
Diffstat (limited to 'util/intelvbttool')
| -rw-r--r-- | util/intelvbttool/intelvbttool.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/util/intelvbttool/intelvbttool.c b/util/intelvbttool/intelvbttool.c index 31fc24a2e0..f0216dd207 100644 --- a/util/intelvbttool/intelvbttool.c +++ b/util/intelvbttool/intelvbttool.c @@ -515,13 +515,20 @@ int main(int argc, char **argv) { const void *ptr; int fd; + off_t offset; if (argc == 2) { fd = open(argv[1], O_RDONLY); - ptr = mmap(0, 65536, PROT_READ, MAP_SHARED, fd, 0); + offset = 0; } else { fd = open("/dev/mem", O_RDONLY); - ptr = mmap(0, 65536, PROT_READ, MAP_SHARED, fd, 0xc0000); + offset = 0xc0000; } + if (fd < 0) { + fprintf(stderr, "open failed: %s\n", strerror(errno)); + return 1; + } + + ptr = mmap(0, 65536, PROT_READ, MAP_SHARED, fd, offset); if (ptr == MAP_FAILED) { fprintf(stderr, "mmap failed: %s\n", strerror(errno)); return 1; |