Add posix_fadvise posix_fadvise64 for arm.

Import INTERNAL_SYSCALL macro for i386 from glibc.
Use above macro in posix_fadvise implementation if an arch defines it.

2 files changed, 33 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/common/posix_fadvise.c b/libc/sysdeps/linux/common/posix_fadvise.c
index 47cf66a9f..3bd689ffb 100644
--- a/libc/sysdeps/linux/common/posix_fadvise.c
+++ b/libc/sysdeps/linux/common/posix_fadvise.c
@@ -19,9 +19,25 @@
 
 #ifdef __NR_fadvise64
 #define __NR_posix_fadvise __NR_fadvise64
+/* get rid of following conditional when
+   all supported arches are having INTERNAL_SYSCALL defined
+*/
+#ifdef INTERNAL_SYSCALL
+int posix_fadvise(int fd, off_t offset, off_t len, int advice)
+{
+	INTERNAL_SYSCALL_DECL(err);
+	int ret = (int) (INTERNAL_SYSCALL(posix_fadvise, err, 5, fd,
+	 __LONG_LONG_PAIR (offset >> 31, offset), len, advice));
+    if (INTERNAL_SYSCALL_ERROR_P (ret, err))
+      return INTERNAL_SYSCALL_ERRNO (ret, err);
+    return 0;
+}
+#else
 _syscall4(int, posix_fadvise, int, fd, off_t, offset,
           off_t, len, int, advice);
 
+#endif
+
 #if defined __UCLIBC_HAS_LFS__ && (!defined __NR_fadvise64_64 || !defined _syscall6)
 extern __typeof(posix_fadvise) posix_fadvise64;
 strong_alias(posix_fadvise,posix_fadvise64)
diff --git a/libc/sysdeps/linux/common/posix_fadvise64.c b/libc/sysdeps/linux/common/posix_fadvise64.c
index d931aff60..31ed5ef03 100644
--- a/libc/sysdeps/linux/common/posix_fadvise64.c
+++ b/libc/sysdeps/linux/common/posix_fadvise64.c
@@ -24,8 +24,25 @@
 #if __WORDSIZE == 64
 
 #define __NR_posix_fadvise64 __NR_fadvise64_64
+
+#ifdef INTERNAL_SYSCALL
+int posix_fadvise64(int fd, __off64_t offset, __off64_t len, int advice)
+{
+  if (len != (off_t) len)
+    return EOVERFLOW;
+  INTERNAL_SYSCALL_DECL (err);
+    int ret = INTERNAL_SYSCALL (posix_fadvise64, err, 6, fd,
+                               __LONG_LONG_PAIR ((long) (offset >> 32),
+                                                 (long) offset),
+                               (off_t) len, advise);
+  if (!INTERNAL_SYSCALL_ERROR_P (ret, err))
+    return 0;
+  return INTERNAL_SYSCALL_ERRNO (ret, err);
+}
+#else
 _syscall4(int, posix_fadvise64, int, fd, __off64_t, offset,
           __off64_t, len, int, advice);
+#endif
 
 /* 32 bit implementation is kind of a pita */
 #elif __WORDSIZE == 32