rt0_linux_mips64x.s

Documentation: runtime

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