1 // Copyright 2014 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_arm_darwin(SB),7,$-4 8 // prepare arguments for main (_rt0_go) 9 MOVW (R13), R0 // argc 10 MOVW $4(R13), R1 // argv 11 MOVW $main(SB), R4 12 B (R4) 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/arm platforms require 18 // cgo and do not support c-shared. 19 TEXT _rt0_arm_darwin_lib(SB),NOSPLIT,$104 20 // Preserve callee-save registers. 21 MOVW R4, 12(R13) 22 MOVW R5, 16(R13) 23 MOVW R6, 20(R13) 24 MOVW R7, 24(R13) 25 MOVW R8, 28(R13) 26 MOVW R11, 32(R13) 27 28 MOVD F8, (32+8*1)(R13) 29 MOVD F9, (32+8*2)(R13) 30 MOVD F10, (32+8*3)(R13) 31 MOVD F11, (32+8*4)(R13) 32 MOVD F12, (32+8*5)(R13) 33 MOVD F13, (32+8*6)(R13) 34 MOVD F14, (32+8*7)(R13) 35 MOVD F15, (32+8*8)(R13) 36 37 MOVW R0, _rt0_arm_darwin_lib_argc<>(SB) 38 MOVW R1, _rt0_arm_darwin_lib_argv<>(SB) 39 40 // Synchronous initialization. 41 MOVW $runtimelibpreinit(SB), R3 42 CALL (R3) 43 44 // Create a new thread to do the runtime initialization and return. 45 MOVW _cgo_sys_thread_create(SB), R3 46 CMP $0, R3 47 B.EQ nocgo 48 MOVW $_rt0_arm_darwin_lib_go(SB), R0 49 MOVW $0, R1 50 BL (R3) 51 B rr 52 nocgo: 53 MOVW $0x400000, R0 54 MOVW R0, (R13) // stacksize 55 MOVW $_rt0_arm_darwin_lib_go(SB), R0 56 MOVW R0, 4(R13) // fn 57 MOVW $0, R0 58 MOVW R0, 8(R13) // fnarg 59 MOVW $runtimenewosproc0(SB), R3 60 BL (R3) 61 rr: 62 // Restore callee-save registers and return. 63 MOVW 12(R13), R4 64 MOVW 16(R13), R5 65 MOVW 20(R13), R6 66 MOVW 24(R13), R7 67 MOVW 28(R13), R8 68 MOVW 32(R13), R11 69 MOVD (32+8*1)(R13), F8 70 MOVD (32+8*2)(R13), F9 71 MOVD (32+8*3)(R13), F10 72 MOVD (32+8*4)(R13), F11 73 MOVD (32+8*5)(R13), F12 74 MOVD (32+8*6)(R13), F13 75 MOVD (32+8*7)(R13), F14 76 MOVD (32+8*8)(R13), F15 77 RET 78 79 80 TEXT _rt0_arm_darwin_lib_go(SB),NOSPLIT,$0 81 MOVW _rt0_arm_darwin_lib_argc<>(SB), R0 82 MOVW _rt0_arm_darwin_lib_argv<>(SB), R1 83 MOVW R0, (R13) 84 MOVW R1, 4(R13) 85 MOVW $runtimert0_go(SB), R4 86 B (R4) 87 88 DATA _rt0_arm_darwin_lib_argc<>(SB)/4, $0 89 GLOBL _rt0_arm_darwin_lib_argc<>(SB),NOPTR, $4 90 DATA _rt0_arm_darwin_lib_argv<>(SB)/4, $0 91 GLOBL _rt0_arm_darwin_lib_argv<>(SB),NOPTR, $4 92 93 TEXT main(SB),NOSPLIT,$-8 94 // save argc and argv onto stack 95 MOVM.DB.W [R0-R1], (R13) 96 MOVW $runtimert0_go(SB), R4 97 B (R4) 98
