mirror of https://go.googlesource.com/go
64 lines
1.7 KiB
ArmAsm
64 lines
1.7 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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#include "cgo/abi_arm64.h"
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TEXT _rt0_arm64_darwin(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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MOVD $1, R16 // sys_exit
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SVC $0x80
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B exit
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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,$152
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// Preserve callee-save registers.
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SAVE_R19_TO_R28(8)
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SAVE_F8_TO_F15(88)
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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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MOVD $0, g // initialize g to nil
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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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MOVD $_rt0_arm64_darwin_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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// Restore callee-save registers.
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RESTORE_R19_TO_R28(8)
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RESTORE_F8_TO_F15(88)
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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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// external linking entry point.
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TEXT main(SB),NOSPLIT|NOFRAME,$0
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JMP _rt0_arm64_darwin(SB)
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