rt0_linux_ppc64.s

Documentation: runtime

     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)
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