rt0_linux_ppc64.s

     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  
     8  DEFINE_PPC64X_FUNCDESC(_rt0_ppc64_linux, _main<>)
     9  DEFINE_PPC64X_FUNCDESC(main, _main<>)
    10  
    11  TEXT _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)
    25  nocgo:
    26  	MOVD	0(R1), R3 // argc
    27  	ADD	$8, R1, R4 // argv
    28  	BR	(CTR)
    29
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