github.com/m10x/go/src@v0.0.0-20220112094212-ba61592315da/runtime/rt0_darwin_arm64.s (about) 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 TEXT _rt0_arm64_darwin(SB),NOSPLIT|NOFRAME,$0 8 MOVD $runtime·rt0_go(SB), R2 9 BL (R2) 10 exit: 11 MOVD $0, R0 12 MOVD $1, R16 // sys_exit 13 SVC $0x80 14 B exit 15 16 // When linking with -buildmode=c-archive or -buildmode=c-shared, 17 // this symbol is called from a global initialization function. 18 // 19 // Note that all currently shipping darwin/arm64 platforms require 20 // cgo and do not support c-shared. 21 TEXT _rt0_arm64_darwin_lib(SB),NOSPLIT,$168 22 // Preserve callee-save registers. 23 MOVD R19, 24(RSP) 24 MOVD R20, 32(RSP) 25 MOVD R21, 40(RSP) 26 MOVD R22, 48(RSP) 27 MOVD R23, 56(RSP) 28 MOVD R24, 64(RSP) 29 MOVD R25, 72(RSP) 30 MOVD R26, 80(RSP) 31 MOVD R27, 88(RSP) 32 MOVD g, 96(RSP) 33 FMOVD F8, 104(RSP) 34 FMOVD F9, 112(RSP) 35 FMOVD F10, 120(RSP) 36 FMOVD F11, 128(RSP) 37 FMOVD F12, 136(RSP) 38 FMOVD F13, 144(RSP) 39 FMOVD F14, 152(RSP) 40 FMOVD F15, 160(RSP) 41 42 MOVD R0, _rt0_arm64_darwin_lib_argc<>(SB) 43 MOVD R1, _rt0_arm64_darwin_lib_argv<>(SB) 44 45 MOVD $0, g // initialize g to nil 46 47 // Synchronous initialization. 48 MOVD $runtime·libpreinit(SB), R4 49 BL (R4) 50 51 // Create a new thread to do the runtime initialization and return. 52 MOVD _cgo_sys_thread_create(SB), R4 53 MOVD $_rt0_arm64_darwin_lib_go(SB), R0 54 MOVD $0, R1 55 SUB $16, RSP // reserve 16 bytes for sp-8 where fp may be saved. 56 BL (R4) 57 ADD $16, RSP 58 59 // Restore callee-save registers. 60 MOVD 24(RSP), R19 61 MOVD 32(RSP), R20 62 MOVD 40(RSP), R21 63 MOVD 48(RSP), R22 64 MOVD 56(RSP), R23 65 MOVD 64(RSP), R24 66 MOVD 72(RSP), R25 67 MOVD 80(RSP), R26 68 MOVD 88(RSP), R27 69 MOVD 96(RSP), g 70 FMOVD 104(RSP), F8 71 FMOVD 112(RSP), F9 72 FMOVD 120(RSP), F10 73 FMOVD 128(RSP), F11 74 FMOVD 136(RSP), F12 75 FMOVD 144(RSP), F13 76 FMOVD 152(RSP), F14 77 FMOVD 160(RSP), F15 78 79 RET 80 81 TEXT _rt0_arm64_darwin_lib_go(SB),NOSPLIT,$0 82 MOVD _rt0_arm64_darwin_lib_argc<>(SB), R0 83 MOVD _rt0_arm64_darwin_lib_argv<>(SB), R1 84 MOVD $runtime·rt0_go(SB), R4 85 B (R4) 86 87 DATA _rt0_arm64_darwin_lib_argc<>(SB)/8, $0 88 GLOBL _rt0_arm64_darwin_lib_argc<>(SB),NOPTR, $8 89 DATA _rt0_arm64_darwin_lib_argv<>(SB)/8, $0 90 GLOBL _rt0_arm64_darwin_lib_argv<>(SB),NOPTR, $8 91 92 // external linking entry point. 93 TEXT main(SB),NOSPLIT|NOFRAME,$0 94 JMP _rt0_arm64_darwin(SB)