1 // Copyright 2015 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 7 // No need for _rt0_arm64_darwin as darwin/arm64 only 8 // supports external linking. 9 TEXT _rt0_arm64_darwin(SB),NOSPLIT,$-8 10 MOVD $42, R0 11 MOVD $1, R16 // SYS_exit 12 SVC $0x80 13 14 // When linking with -buildmode=c-archive or -buildmode=c-shared, 15 // this symbol is called from a global initialization function. 16 // 17 // Note that all currently shipping darwin/arm64 platforms require 18 // cgo and do not support c-shared. 19 TEXT _rt0_arm64_darwin_lib(SB),NOSPLIT,$168 20 // Preserve callee-save registers. 21 MOVD R19, 24(RSP) 22 MOVD R20, 32(RSP) 23 MOVD R21, 40(RSP) 24 MOVD R22, 48(RSP) 25 MOVD R23, 56(RSP) 26 MOVD R24, 64(RSP) 27 MOVD R25, 72(RSP) 28 MOVD R26, 80(RSP) 29 MOVD R27, 88(RSP) 30 FMOVD F8, 96(RSP) 31 FMOVD F9, 104(RSP) 32 FMOVD F10, 112(RSP) 33 FMOVD F11, 120(RSP) 34 FMOVD F12, 128(RSP) 35 FMOVD F13, 136(RSP) 36 FMOVD F14, 144(RSP) 37 FMOVD F15, 152(RSP) 38 39 MOVD R0, _rt0_arm64_darwin_lib_argc<>(SB) 40 MOVD R1, _rt0_arm64_darwin_lib_argv<>(SB) 41 42 // Synchronous initialization. 43 MOVD $runtimelibpreinit(SB), R4 44 BL (R4) 45 46 // Create a new thread to do the runtime initialization and return. 47 MOVD _cgo_sys_thread_create(SB), R4 48 MOVD $_rt0_arm64_darwin_lib_go(SB), R0 49 MOVD $0, R1 50 BL (R4) 51 52 // Restore callee-save registers. 53 MOVD 24(RSP), R19 54 MOVD 32(RSP), R20 55 MOVD 40(RSP), R21 56 MOVD 48(RSP), R22 57 MOVD 56(RSP), R23 58 MOVD 64(RSP), R24 59 MOVD 72(RSP), R25 60 MOVD 80(RSP), R26 61 MOVD 88(RSP), R27 62 FMOVD 96(RSP), F8 63 FMOVD 104(RSP), F9 64 FMOVD 112(RSP), F10 65 FMOVD 120(RSP), F11 66 FMOVD 128(RSP), F12 67 FMOVD 136(RSP), F13 68 FMOVD 144(RSP), F14 69 FMOVD 152(RSP), F15 70 RET 71 72 TEXT _rt0_arm64_darwin_lib_go(SB),NOSPLIT,$0 73 MOVD _rt0_arm64_darwin_lib_argc<>(SB), R0 74 MOVD _rt0_arm64_darwin_lib_argv<>(SB), R1 75 MOVD $runtimert0_go(SB), R4 76 B (R4) 77 78 DATA _rt0_arm64_darwin_lib_argc<>(SB)/8, $0 79 GLOBL _rt0_arm64_darwin_lib_argc<>(SB),NOPTR, $8 80 DATA _rt0_arm64_darwin_lib_argv<>(SB)/8, $0 81 GLOBL _rt0_arm64_darwin_lib_argv<>(SB),NOPTR, $8 82 83 TEXT main(SB),NOSPLIT,$-8 84 MOVD $runtimert0_go(SB), R2 85 BL (R2) 86 exit: 87 MOVD $0, R0 88 MOVD $1, R16 // sys_exit 89 SVC $0x80 90 B exit 91
