mirror of https://go.googlesource.com/go
72 lines
1.8 KiB
ArmAsm
72 lines
1.8 KiB
ArmAsm
// Copyright 2019 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#include "textflag.h"
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#include "cgo/abi_arm64.h"
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TEXT _rt0_arm64_netbsd(SB),NOSPLIT|NOFRAME,$0
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MOVD 0(RSP), R0 // argc
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ADD $8, RSP, R1 // argv
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BL main(SB)
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// When building with -buildmode=c-shared, this symbol is called when the shared
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// library is loaded.
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TEXT _rt0_arm64_netbsd_lib(SB),NOSPLIT,$184
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// Preserve callee-save registers.
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SAVE_R19_TO_R28(24)
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SAVE_F8_TO_F15(104)
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// Initialize g as null in case of using g later e.g. sigaction in cgo_sigaction.go
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MOVD ZR, g
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MOVD R0, _rt0_arm64_netbsd_lib_argc<>(SB)
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MOVD R1, _rt0_arm64_netbsd_lib_argv<>(SB)
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// Synchronous initialization.
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MOVD $runtime·libpreinit(SB), R4
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BL (R4)
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// Create a new thread to do the runtime initialization and return.
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MOVD _cgo_sys_thread_create(SB), R4
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CBZ R4, nocgo
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MOVD $_rt0_arm64_netbsd_lib_go(SB), R0
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MOVD $0, R1
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SUB $16, RSP // reserve 16 bytes for sp-8 where fp may be saved.
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BL (R4)
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ADD $16, RSP
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B restore
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nocgo:
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MOVD $0x800000, R0 // stacksize = 8192KB
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MOVD $_rt0_arm64_netbsd_lib_go(SB), R1
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MOVD R0, 8(RSP)
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MOVD R1, 16(RSP)
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MOVD $runtime·newosproc0(SB),R4
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BL (R4)
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restore:
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// Restore callee-save registers.
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RESTORE_R19_TO_R28(24)
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RESTORE_F8_TO_F15(104)
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RET
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TEXT _rt0_arm64_netbsd_lib_go(SB),NOSPLIT,$0
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MOVD _rt0_arm64_netbsd_lib_argc<>(SB), R0
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MOVD _rt0_arm64_netbsd_lib_argv<>(SB), R1
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MOVD $runtime·rt0_go(SB),R4
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B (R4)
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DATA _rt0_arm64_netbsd_lib_argc<>(SB)/8, $0
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GLOBL _rt0_arm64_netbsd_lib_argc<>(SB),NOPTR, $8
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DATA _rt0_arm64_netbsd_lib_argv<>(SB)/8, $0
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GLOBL _rt0_arm64_netbsd_lib_argv<>(SB),NOPTR, $8
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TEXT main(SB),NOSPLIT|NOFRAME,$0
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MOVD $runtime·rt0_go(SB), R2
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BL (R2)
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exit:
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MOVD $0, R0
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SVC $1 // sys_exit
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