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authorMike Frysinger <vapier@gentoo.org>2007-05-31 08:22:35 +0000
committerMike Frysinger <vapier@gentoo.org>2007-05-31 08:22:35 +0000
commit8daa5a586a8daef3af754328ee84d4079750dc56 (patch)
treef35e54afc19001976ce0b23e231aeda49e5be347 /libc/sysdeps/linux/mips/posix_fadvise.c
parent2b178f6024cd7698ff0330d57622de592c86712b (diff)
Atsushi Nemoto writes:
Current MIPS readahead(), posix_fadvise(), posix_fadvise64() do not match with kernel on all ABIs. On O32 ABI, a padding is needed before a long long argument. On N32/N64, a long long argument should be passed via a single register.
Diffstat (limited to 'libc/sysdeps/linux/mips/posix_fadvise.c')
-rw-r--r--libc/sysdeps/linux/mips/posix_fadvise.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/mips/posix_fadvise.c b/libc/sysdeps/linux/mips/posix_fadvise.c
new file mode 100644
index 000000000..8546d96ba
--- /dev/null
+++ b/libc/sysdeps/linux/mips/posix_fadvise.c
@@ -0,0 +1,39 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * posix_fadvise() for MIPS uClibc
+ * http://www.opengroup.org/onlinepubs/009695399/functions/posix_fadvise.html
+ *
+ * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <features.h>
+#include <unistd.h>
+#include <errno.h>
+#include <endian.h>
+#include <stdint.h>
+#include <sys/types.h>
+#include <sys/syscall.h>
+#include <fcntl.h>
+
+int posix_fadvise(int fd, off_t offset, off_t len, int advice)
+{
+/* MIPS kernel only has NR_fadvise64 which acts as NR_fadvise64_64 */
+#ifdef __NR_fadvise64
+ INTERNAL_SYSCALL_DECL(err);
+# if _MIPS_SIM == _ABIO32
+ int ret = INTERNAL_SYSCALL(fadvise64, err, 7, fd, 0,
+ __LONG_LONG_PAIR ((long) (offset >> 31), (long) offset),
+ __LONG_LONG_PAIR ((long) (len >> 31), (long) len),
+ advice);
+# else /* N32 || N64 */
+ int ret = INTERNAL_SYSCALL(fadvise64, err, 4, fd, offset, len, advice);
+# endif
+ if (INTERNAL_SYSCALL_ERROR_P (ret, err))
+ return INTERNAL_SYSCALL_ERRNO (ret, err);
+ return 0;
+#else
+ return ENOSYS;
+#endif
+}