1// Copyright 2016 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5#include "textflag.h"
6#include "asm_ppc64x.h"
7
8DEFINE_PPC64X_FUNCDESC(_rt0_ppc64_linux, _main<>)
9DEFINE_PPC64X_FUNCDESC(main, _main<>)
10
11TEXT _main<>(SB),NOSPLIT,$-8
12	// In a statically linked binary, the stack contains argc,
13	// argv as argc string pointers followed by a NULL, envv as a
14	// sequence of string pointers followed by a NULL, and auxv.
15	// There is no TLS base pointer.
16	//
17	// TODO(austin): Support ABI v1 dynamic linking entry point
18	XOR	R0, R0 // Note, newer kernels may not always set R0 to 0.
19	MOVD	$runtime·rt0_go(SB), R12
20	MOVD	R12, CTR
21	MOVBZ	runtime·iscgo(SB), R5
22	CMP	R5, $0
23	BEQ	nocgo
24	BR	(CTR)
25nocgo:
26	MOVD	0(R1), R3 // argc
27	ADD	$8, R1, R4 // argv
28	BR	(CTR)
29