[MIPS64] libc/libm support
libc/libm support for MIPS64 targets
Change-Id: I8271941d418612a286be55495f0e95822f90004f
Signed-off-by: Chris Dearman <chris.dearman@imgtec.com>
Signed-off-by: Raghu Gandham <raghu.gandham@imgtec.com>
diff --git a/libc/arch-mips64/bionic/getdents.cpp b/libc/arch-mips64/bionic/getdents.cpp
new file mode 100644
index 0000000..66a61ec
--- /dev/null
+++ b/libc/arch-mips64/bionic/getdents.cpp
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * The MIPS64 getdents64() system call is only present in 3.10+ kernels.
+ * If the getdents64() system call is not available fall back to using
+ * getdents() and modify the result to be compatible with getdents64().
+ */
+
+#include <dirent.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+
+/* The mips_getdents type is 64bit clean */
+struct mips_dirent {
+ uint64_t d_ino; /* Inode number */
+ uint64_t d_off; /* Offset to next mips_dirent */
+ uint16_t d_reclen; /* Length of this mips_dirent */
+ char d_name[]; /* Filename (null-terminated) */
+ /* length is actually (d_reclen - 2 -
+ offsetof(struct mips_dirent, d_name) */
+ // char pad; /* Zero padding byte */
+ // char d_type; /* File type (only since Linux 2.6.4; offset is (d_reclen - 1)) */
+};
+
+extern "C" int __getdents64(unsigned int fd, struct dirent *dirp, unsigned int count);
+extern "C" int __getdents(unsigned int fd, struct mips_dirent *dirp, unsigned int count);
+int getdents(unsigned int fd, struct dirent *dirp, unsigned int count)
+{
+ int r;
+ int oerrno = errno;
+
+ /* Use getdents64() if it is available */
+ r = __getdents64(fd, dirp, count);
+ if (r >= 0 || errno != ENOSYS)
+ return r;
+
+ /* Fallback to getdents() */
+ errno = oerrno;
+ r = __getdents(fd, (struct mips_dirent *)dirp, count);
+ if (r > 0) {
+ char *p;
+ char type;
+ union dirents {
+ struct mips_dirent m;
+ struct dirent d;
+ } *u;
+
+ p = (char *)dirp;
+ do {
+ u = (union dirents *)p;
+
+ /* This should not happen, but just in case... */
+ if (p + u->m.d_reclen > (char *)dirp + r)
+ break;
+
+ /* shuffle the dirent */
+ type = *(p + u->m.d_reclen - 1);
+ memmove(u->d.d_name, u->m.d_name,
+ u->m.d_reclen - 2 - offsetof(struct mips_dirent, d_name) + 1);
+ u->d.d_type = type;
+
+ p += u->m.d_reclen;
+ } while (p < (char *)dirp + r);
+ }
+ return r;
+}