zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/build/uClibc/libc/sysdeps/linux/sh/clone.S b/ap/build/uClibc/libc/sysdeps/linux/sh/clone.S
new file mode 100644
index 0000000..423a6c2
--- /dev/null
+++ b/ap/build/uClibc/libc/sysdeps/linux/sh/clone.S
@@ -0,0 +1,134 @@
+/* Copyright (C) 1999, 2000, 2003, 2004, 2007 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. */
+
+/* clone() is even more special than fork() as it mucks with stacks
+ and invokes a function in the right context after its all over. */
+
+#include <features.h>
+#include <asm/unistd.h>
+#include <sysdep.h>
+#define _ERRNO_H 1
+#include <bits/errno.h>
+#ifdef RESET_PID
+#include <tcb-offsets.h>
+#endif
+/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg,
+ pid_t *ptid, void *tls, pid_t *ctid); */
+
+ .text
+ENTRY(__clone)
+ /* sanity check arguments. */
+ tst r4, r4
+ bt/s 0f
+ tst r5, r5
+ bf 1f
+0:
+ bra .Lsyscall_error
+ mov #-EINVAL,r0
+1:
+ /* insert the args onto the new stack */
+ mov.l r7, @-r5
+ /* save the function pointer as the 0th element */
+ mov.l r4, @-r5
+
+ /* do the system call */
+ mov r6, r4
+ mov.l @r15, r6
+ mov.l @(8,r15), r7
+ mov.l @(4,r15), r0
+ mov #+SYS_ify(clone), r3
+ trapa #0x15
+ mov r0, r1
+ mov #-12, r2
+ shad r2, r1
+ not r1, r1 // r1=0 means r0 = -1 to -4095
+ tst r1, r1 // i.e. error in linux
+ bf .Lclone_end
+.Lsyscall_error:
+ SYSCALL_ERROR_HANDLER
+.Lclone_end:
+ tst r0, r0
+ bt 2f
+.Lpseudo_end:
+ rts
+ nop
+2:
+ /* terminate the stack frame */
+ mov #0, r14
+#ifdef RESET_PID
+ mov r4, r0
+ shlr16 r0
+ tst #1, r0 // CLONE_THREAD = (1 << 16)
+ bf/s 4f
+ mov r4, r0
+ /* new pid */
+ shlr8 r0
+ tst #1, r0 // CLONE_VM = (1 << 8)
+ bf/s 3f
+ mov #-1, r0
+ mov #+SYS_ify(getpid), r3
+ trapa #0x15
+3:
+ stc gbr, r1
+ mov.w .Lpidoff, r2
+ add r1, r2
+ mov.l r0, @r2
+ mov.w .Ltidoff, r2
+ add r1, r2
+ mov.l r0, @r2
+4:
+#endif
+ /* thread starts */
+ mov.l @r15, r1
+ jsr @r1
+ mov.l @(4,r15), r4
+
+ /* we are done, passing the return value through r0 */
+ mov.l .L3, r1
+#ifdef SHARED
+ mov.l r12, @-r15
+ sts.l pr, @-r15
+ mov r0, r4
+ mova .LG, r0
+ mov.l .LG, r12
+ add r0, r12
+ mova .L3, r0
+ add r0, r1
+ jsr @r1
+ nop
+ lds.l @r15+, pr
+ rts
+ mov.l @r15+, r12
+#else
+ jmp @r1
+ mov r0, r4
+#endif
+ .align 2
+.LG:
+ .long _GLOBAL_OFFSET_TABLE_
+.L3:
+ .long PLTJMP(C_SYMBOL_NAME(_exit))
+#ifdef RESET_PID
+.Lpidoff:
+ .word PID - TLS_PRE_TCB_SIZE
+.Ltidoff:
+ .word TID - TLS_PRE_TCB_SIZE
+#endif
+PSEUDO_END (__clone)
+
+weak_alias (__clone, clone)