rt0_openbsd_mips64.s

Documentation: runtime

     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)
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