libc: Add ftruncate64 and improve 64-bit parameter syscall handling.
This patch improves the handling of 64-bit parameters in syscalls on ARM.
The ARM EABI mandates that 64-bit quantities be passed in even/odd register
pairs, which requires special treatment.
This allows us to simplify our implementations of pread() and pwrite()
and remove the C stubs for pread64() and pwrite64().
Also add ftruncate64() to <unistd.h>
Change-Id: I407e2fd223ba0093dd2d0b04c6152fadfc9ce3ef
Bug 3107933
diff --git a/libc/unistd/pread.c b/libc/unistd/pread.c
index ec4691a..42fc3bc 100644
--- a/libc/unistd/pread.c
+++ b/libc/unistd/pread.c
@@ -28,10 +28,8 @@
#include <sys/types.h>
#include <unistd.h>
-extern int __pread64(int fd, void *buf, size_t nbytes, loff_t offset);
-
ssize_t pread(int fd, void *buf, size_t nbytes, off_t offset)
{
- return __pread64(fd, buf, nbytes, offset);
+ return pread64(fd, buf, nbytes, (off64_t)offset);
}