Rewrite ptrace(2) wrappers in C.

Besides removing hand-translation to assembler, this also adds missing
wrappers for arm64 and risc-v.

Reviewed by:	emaste, jhb
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D7694

2 files changed, 1 insertions, 62 deletions

diff --git a/lib/libc/powerpc/sys/Makefile.inc b/lib/libc/powerpc/sys/Makefile.inc
index 061abd4ebccc..c37bd901bd91 100644
--- a/lib/libc/powerpc/sys/Makefile.inc
+++ b/lib/libc/powerpc/sys/Makefile.inc
@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-MDASM+=	brk.S cerror.S exect.S ptrace.S sbrk.S setlogin.S
+MDASM+=	brk.S cerror.S exect.S sbrk.S setlogin.S
 
 # Don't generate default code for these syscalls:
 NOASM=	break.o exit.o getlogin.o sstk.o yield.o
diff --git a/lib/libc/powerpc/sys/ptrace.S b/lib/libc/powerpc/sys/ptrace.S
deleted file mode 100644
index cff463dd009c..000000000000
--- a/lib/libc/powerpc/sys/ptrace.S
+++ /dev/null
@@ -1,61 +0,0 @@
-/*-
- * Copyright (c) 2002 Peter Grehan.
- * All rights reserved.
- *
- * 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.
- */
-/*      $NetBSD: ptrace.S,v 1.3 2000/02/23 20:16:57 kleink Exp $        */
-
-#include <machine/asm.h>
-__FBSDID("$FreeBSD$");
-
-#include "SYS.h"
-
-ENTRY(ptrace)
-	mflr	%r0
-	stwu	%r1,-32(%r1)
-	stw	%r0,36(%r1)
-	stw	%r3,8(%r1)
-	stw	%r4,12(%r1)
-	stw	%r5,16(%r1)
-	stw	%r6,20(%r1)
-
-	bl	PIC_PLT(CNAME(__error))
-	li	%r7,0
-	stw	%r7,0(%r3)
-
-	lwz	%r3,8(%r1)
-	lwz	%r4,12(%r1)
-	lwz	%r5,16(%r1)
-	lwz	%r0,36(%r1)
-	lwz	%r6,20(%r1)
-	mtlr	%r0
-	la	%r1,32(%r1)
-	li	%r0,SYS_ptrace
-	sc
-	bso	1f
-	blr
-1:
-	b	PIC_PLT(HIDENAME(cerror))
-END(ptrace)
-
-	.section .note.GNU-stack,"",%progbits