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src/runtime/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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