mirror of
https://github.com/golang/go
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e8b7133e9b
Change-Id: Ib227aa3e14d01a0ab1ad9e53d107858e045d1c42 Reviewed-on: https://go-review.googlesource.com/8984 Reviewed-by: Ian Lance Taylor <iant@golang.org>
56 lines
1.6 KiB
ArmAsm
56 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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// No need for _rt0_arm64_darwin as darwin/arm64 only
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// supports external linking.
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TEXT _rt0_arm64_darwin(SB),NOSPLIT,$-8
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MOVD $42, R0
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MOVD $1, R16 // SYS_exit
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SVC $0x80
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// When linking with -buildmode=c-archive or -buildmode=c-shared,
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// this symbol is called from a global initialization function.
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//
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// Note that all currently shipping darwin/arm64 platforms require
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// cgo and do not support c-shared.
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TEXT _rt0_arm64_darwin_lib(SB),NOSPLIT,$0
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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. So we save it to a
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// temporary register.
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MOVD R27, R7
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MOVD R0, _rt0_arm64_darwin_lib_argc<>(SB)
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MOVD R1, _rt0_arm64_darwin_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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MOVD $_rt0_arm64_darwin_lib_go(SB), R0
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MOVD $0, R1
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BL (R4)
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MOVD R7, R27
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RET
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TEXT _rt0_arm64_darwin_lib_go(SB),NOSPLIT,$0
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MOVD _rt0_arm64_darwin_lib_argc<>(SB), R0
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MOVD _rt0_arm64_darwin_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_darwin_lib_argc<>(SB)/8, $0
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GLOBL _rt0_arm64_darwin_lib_argc<>(SB),NOPTR, $8
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DATA _rt0_arm64_darwin_lib_argv<>(SB)/8, $0
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GLOBL _rt0_arm64_darwin_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 $1, R16 // sys_exit
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SVC $0x80
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B exit
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