github.com/eun/go@v0.0.0-20170811110501-92cfd07a6cfd/src/runtime/rt0_linux_mips64x.s (about)

     1  // Copyright 2015 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  // +build linux
     6  // +build mips64 mips64le
     7  
     8  #include "textflag.h"
     9  
    10  TEXT _rt0_mips64_linux(SB),NOSPLIT,$0
    11  	JMP	_main<>(SB)
    12  
    13  TEXT _rt0_mips64le_linux(SB),NOSPLIT,$0
    14  	JMP	_main<>(SB)
    15  
    16  TEXT _main<>(SB),NOSPLIT,$-8
    17  	// In a statically linked binary, the stack contains argc,
    18  	// argv as argc string pointers followed by a NULL, envv as a
    19  	// sequence of string pointers followed by a NULL, and auxv.
    20  	// There is no TLS base pointer.
    21  #ifdef GOARCH_mips64
    22  	MOVW	4(R29), R4 // argc, big-endian ABI places int32 at offset 4
    23  #else
    24  	MOVW	0(R29), R4 // argc
    25  #endif
    26  	ADDV	$8, R29, R5 // argv
    27  	JMP	main(SB)
    28  
    29  TEXT main(SB),NOSPLIT,$-8
    30  	// in external linking, glibc jumps to main with argc in R4
    31  	// and argv in R5
    32  
    33  	// initialize REGSB = PC&0xffffffff00000000
    34  	BGEZAL	R0, 1(PC)
    35  	SRLV	$32, R31, RSB
    36  	SLLV	$32, RSB
    37  
    38  	MOVV	$runtime·rt0_go(SB), R1
    39  	JMP	(R1)