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Index: lib/libc/aarch64/sys/Makefile.inc
===================================================================
--- lib/libc/aarch64/sys/Makefile.inc
+++ lib/libc/aarch64/sys/Makefile.inc
@@ -4,8 +4,8 @@
SRCS+= __vdso_gettc.c
-#MDASM= ptrace.S
MDASM= cerror.S \
+ ptrace.S \
shmat.S \
sigreturn.S \
syscall.S \
@@ -15,6 +15,7 @@
NOASM= break.o \
exit.o \
getlogin.o \
+ ptrace.o \
sbrk.o \
sstk.o \
vfork.o \
Index: lib/libc/aarch64/sys/ptrace.S
===================================================================
--- /dev/null
+++ lib/libc/aarch64/sys/ptrace.S
@@ -0,0 +1,50 @@
+/*-
+ * Copyright (c) 2016 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * Portions of this software were developed by Konstantin Belousov
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. 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 AUTHOR 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 AUTHOR 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.
+ */
+
+#include <machine/asm.h>
+__FBSDID("$FreeBSD$");
+#include <SYS.h>
+
+ .globl _C_LABEL(__error)
+ .type _C_LABEL(__error),@function
+
+ENTRY(ptrace)
+ stp x0, x1, [sp, #-48]!
+ stp x2, x3, [sp, #16]
+ stp x29, lr, [sp, #32]
+ add x29, sp, #32
+ bl _C_LABEL(__error)
+ str xzr, [x0]
+ ldp x29, lr, [sp, #32]
+ ldp x2, x3, [sp, #16]
+ ldp x0, x1, [sp], #48
+ _SYSCALL(ptrace)
+ b.cs cerror
+ ret
+END(ptrace)

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