1// Copyright 2020 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
7TEXT _rt0_mips64_openbsd(SB),NOSPLIT,$0
8	JMP	_main<>(SB)
9
10TEXT _rt0_mips64le_openbsd(SB),NOSPLIT,$0
11	JMP	_main<>(SB)
12
13TEXT _main<>(SB),NOSPLIT|NOFRAME,$0
14	// In a statically linked binary, the stack contains argc,
15	// argv as argc string pointers followed by a NULL, envv as a
16	// sequence of string pointers followed by a NULL, and auxv.
17	// There is no TLS base pointer.
18#ifdef GOARCH_mips64
19	MOVW	4(R29), R4 // argc, big-endian ABI places int32 at offset 4
20#else
21	MOVW	0(R29), R4 // argc
22#endif
23	ADDV	$8, R29, R5 // argv
24	JMP	main(SB)
25
26TEXT main(SB),NOSPLIT|NOFRAME,$0
27	// in external linking, glibc jumps to main with argc in R4
28	// and argv in R5
29
30	// initialize REGSB = PC&0xffffffff00000000
31	BGEZAL	R0, 1(PC)
32	SRLV	$32, R31, RSB
33	SLLV	$32, RSB
34
35	MOVV	$runtime·rt0_go(SB), R1
36	JMP	(R1)
37