zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/build/uClibc/libc/sysdeps/linux/powerpc/clone.S b/ap/build/uClibc/libc/sysdeps/linux/powerpc/clone.S
new file mode 100644
index 0000000..8583c66
--- /dev/null
+++ b/ap/build/uClibc/libc/sysdeps/linux/powerpc/clone.S
@@ -0,0 +1,145 @@
+/* Wrapper around clone system call.
+ Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <features.h>
+#define _ERRNO_H 1
+#include <bits/errno.h>
+#include <sysdep.h>
+
+#define CLONE_VM 0x00000100
+#define CLONE_THREAD 0x00010000
+
+/* This is the only really unusual system call in PPC linux, but not
+ because of any weirdness in the system call itself; because of
+ all the freaky stuff we have to do to make the call useful. */
+
+/* int [r3] clone(int (*fn)(void *arg) [r3], void *child_stack [r4],
+ int flags [r5], void *arg [r6], void *parent_tid [r7],
+ void *tls [r8], void *child_tid [r9]); */
+
+#ifdef __NR_clone
+ .globl __clone
+ .type __clone,@function
+ .align 2
+
+__clone:
+ /* Check for child_stack == NULL || fn == NULL. */
+ cmpwi cr0,r4,0
+ cmpwi cr1,r3,0
+ cror cr0*4+eq,cr1*4+eq,cr0*4+eq
+ beq- cr0,.Lbadargs
+
+ /* Set up stack frame for parent. */
+ stwu r1,-32(r1)
+ cfi_adjust_cfa_offset (32)
+#ifdef RESET_PID
+ stmw r28,16(r1)
+#else
+# ifndef __ASSUME_FIXED_CLONE_SYSCALL
+ stmw r29,16(r1)
+# else
+ stmw r30,16(r1)
+# endif
+#endif
+
+ /* Set up stack frame for child. */
+ clrrwi r4,r4,4
+ li r0,0
+ stwu r0,-16(r4)
+
+ /* Save fn, args, stack across syscall. */
+ mr r30,r3 /* Function in r30. */
+#ifndef __ASSUME_FIXED_CLONE_SYSCALL
+ mr r29,r4 /* Stack pointer in r29. */
+#endif
+#ifdef RESET_PID
+ mr r28,r5
+#endif
+ mr r31,r6 /* Argument in r31. */
+
+ /* 'flags' argument is first parameter to clone syscall. (The other
+ argument is the stack pointer, already in r4.) */
+ mr r3,r5
+
+ /* Move the parent_tid, child_tid and tls arguments. */
+ mr r5,r7
+ mr r6,r8
+ mr r7,r9
+
+ /* End FDE now, because in the child the unwind info will be wrong. */
+ cfi_endproc
+
+ /* Do the call. */
+ li 0, __NR_clone
+ sc
+
+ /* Check for child process. */
+ cmpwi cr1,r3,0
+ crandc cr1*4+eq,cr1*4+eq,cr0*4+so
+ bne- cr1,.Lparent /* The '-' is to minimise the race. */
+
+#ifndef __ASSUME_FIXED_CLONE_SYSCALL
+ /* On at least mklinux DR3a5, clone() doesn't actually change
+ the stack pointer. I'm pretty sure this is a bug, because
+ it adds a race condition if a signal is sent to a thread
+ just after it is created (in the previous three instructions). */
+ mr r1,r29
+#endif
+
+#ifdef RESET_PID
+ andis. r0,r28,CLONE_THREAD>>16
+ bne+ r0,.Loldpid
+ andi. r0,r28,CLONE_VM
+ li r3,-1
+ bne- r0,.Lnomoregetpid
+.Lnomoregetpid:
+ stw r3,TID(r2)
+ stw r3,PID(r2)
+.Loldpid:
+#endif
+ /* Call procedure. */
+ mtctr r30
+ mr r3,r31
+ bctrl
+ /* Call _exit with result from procedure. */
+ b HIDDEN_JUMPTARGET(_exit)
+
+.Lparent:
+ /* Parent. Restore registers & return. */
+#ifdef RESET_PID
+ lmw r28,16(r1)
+#else
+# ifndef __ASSUME_FIXED_CLONE_SYSCALL
+ lmw r29,16(r1)
+# else
+ lmw r30,16(r1)
+# endif
+#endif
+ addi r1,r1,32
+ bnslr+
+ b __syscall_error
+
+.Lbadargs:
+ li r3,EINVAL
+ b __syscall_error
+
+ cfi_startproc
+ .size __clone,.-__clone
+weak_alias(__clone, clone)
+#endif