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_...@c-sky.com>
---
libc/sysdeps/linux/common/preadv.c | 7 ++++++-
libc/sysdeps/linux/common/pwritev.c | 7 ++++++-
2 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/libc/sysdeps/linux/common/preadv.c
b/libc/sysdeps/linux/common/preadv.c
index b90291b..fd9dde4 100644
--- a/libc/sysdeps/linux/common/preadv.c
+++ b/libc/sysdeps/linux/common/preadv.c
@@ -23,6 +23,11 @@
ssize_t
preadv (int fd, const struct iovec *vector, int count, off_t offset)
{
- return INLINE_SYSCALL (preadv, 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 (preadv, 5, fd, vector, count, pos_l, pos_h);
}
#endif
diff --git a/libc/sysdeps/linux/common/pwritev.c
b/libc/sysdeps/linux/common/pwritev.c
index a1880ed..bef5bcf 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
--
2.7.4
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