diff options
| author | Guo Ren <ren_guo@c-sky.com> | 2017-09-25 21:15:04 +0800 |
|---|---|---|
| committer | Waldemar Brodkorb <wbx@uclibc-ng.org> | 2017-10-01 08:54:13 +0200 |
| commit | 8b233f2491b286a2bd741b042719fdf5fde50eb2 (patch) | |
| tree | 1399ccbb0ee451aecd9b9659f0266b7b95ca86de /libc/sysdeps/linux/common/pwritev.c | |
| parent | 2a3bb4daf5778c5875674cd26a3c75b3d460a042 (diff) | |
preadv/pwritev: bugfix preadv/pwritev syscall should be 5 args
The current uclibc-ng use 4 arguments, and this will cause
ltp-testsuite's preadv/pwritev case failed.
The syscall of preadv/pwritev in current linux-kernel is 5 arguments:
linux/fs/read_write.c:
SYSCALL_DEFINE5(preadv, unsigned long, fd, const struct iovec __user *, vec,
unsigned long, vlen, unsigned long, pos_l, unsigned long, pos_h)
SYSCALL_DEFINE5(pwritev, unsigned long, fd, const struct iovec __user *, vec,
unsigned long, vlen, unsigned long, pos_l, unsigned long, pos_h)
So just update to 5-args-syscall, and off_t could be 32bit or 64bit.
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Diffstat (limited to 'libc/sysdeps/linux/common/pwritev.c')
| -rw-r--r-- | libc/sysdeps/linux/common/pwritev.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/libc/sysdeps/linux/common/pwritev.c b/libc/sysdeps/linux/common/pwritev.c index a1880ed32..bef5bcf69 100644 --- a/libc/sysdeps/linux/common/pwritev.c +++ b/libc/sysdeps/linux/common/pwritev.c @@ -23,6 +23,11 @@ ssize_t pwritev (int fd, const struct iovec *vector, int count, off_t offset) { - return INLINE_SYSCALL (pwritev, 4, fd, vector, count, offset); + unsigned long pos_l, pos_h; + + pos_h = (unsigned long)((long long)offset >> 32); + pos_l = (unsigned long)((long long)offset); + + return INLINE_SYSCALL (pwritev, 5, fd, vector, count, pos_l, pos_h); } #endif |