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https://github.com/golang/go
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73ff7cb1ed
Change-Id: I7dab124842f5209097a8d5a802fcbdde650654fa Reviewed-on: https://go-review.googlesource.com/16395 Reviewed-by: Ian Lance Taylor <iant@golang.org>
64 lines
1.6 KiB
ArmAsm
64 lines
1.6 KiB
ArmAsm
// Copyright 2015 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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TEXT _rt0_arm64_linux(SB),NOSPLIT,$-8
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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_linux_lib(SB),NOSPLIT,$40
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// R27 is REGTMP, reserved for liblink. It is used below to
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// move R0/R1 into globals. However in the standard ARM64 calling
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// convention, it is a callee-saved register.
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MOVD R27, 24(RSP)
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MOVD R0, _rt0_arm64_linux_lib_argc<>(SB)
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MOVD R1, _rt0_arm64_linux_lib_argv<>(SB)
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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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CMP $0, R4
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BEQ nocgo
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MOVD $_rt0_arm64_linux_lib_go(SB), R0
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MOVD $0, R1
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BL (R4)
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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_linux_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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MOVD 24(RSP), R27
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RET
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TEXT _rt0_arm64_linux_lib_go(SB),NOSPLIT,$0
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MOVD _rt0_arm64_linux_lib_argc<>(SB), R0
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MOVD _rt0_arm64_linux_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_linux_lib_argc<>(SB)/8, $0
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GLOBL _rt0_arm64_linux_lib_argc<>(SB),NOPTR, $8
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DATA _rt0_arm64_linux_lib_argv<>(SB)/8, $0
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GLOBL _rt0_arm64_linux_lib_argv<>(SB),NOPTR, $8
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TEXT main(SB),NOSPLIT,$-8
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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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MOVD $94, R8 // sys_exit
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SVC
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B exit
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