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 // 8 // System call support for ARM, Darwin 9 // 10 11 // func Syscall(syscall uintptr, a1, a2, a3 uintptr) (r1, r2, err uintptr) 12 TEXT Syscall(SB),NOSPLIT,$0-28 13 BL runtimeentersyscall(SB) 14 MOVW trap+0(FP), R12 15 MOVW a1+4(FP), R0 16 MOVW a2+8(FP), R1 17 MOVW a3+12(FP), R2 18 SWI $0x80 19 BCC ok 20 MOVW $-1, R1 21 MOVW R1, r1+16(FP) // r1 22 MOVW $0, R2 23 MOVW R2, r2+20(FP) // r2 24 MOVW R0, err+24(FP) // err 25 BL runtimeexitsyscall(SB) 26 RET 27 ok: 28 MOVW R0, r1+16(FP) // r1 29 MOVW R1, r2+20(FP) // r2 30 MOVW $0, R0 31 MOVW R0, err+24(FP) // err 32 BL runtimeexitsyscall(SB) 33 RET 34 35 // func RawSyscall(trap uintptr, a1, a2, a3 uintptr) (r1, r2, err uintptr) 36 TEXT RawSyscall(SB),NOSPLIT,$0-28 37 MOVW trap+0(FP), R12 // syscall entry 38 MOVW a1+4(FP), R0 39 MOVW a2+8(FP), R1 40 MOVW a3+12(FP), R2 41 SWI $0x80 42 BCC ok1 43 MOVW $-1, R1 44 MOVW R1, r1+16(FP) // r1 45 MOVW $0, R2 46 MOVW R2, r2+20(FP) // r2 47 MOVW R0, err+24(FP) // err 48 RET 49 ok1: 50 MOVW R0, r1+16(FP) // r1 51 MOVW R1, r2+20(FP) // r2 52 MOVW $0, R0 53 MOVW R0, err+24(FP) // err 54 RET 55 56 // func Syscall6(trap uintptr, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) 57 TEXT Syscall6(SB),NOSPLIT,$0-40 58 BL runtimeentersyscall(SB) 59 MOVW trap+0(FP), R12 // syscall entry 60 MOVW a1+4(FP), R0 61 MOVW a2+8(FP), R1 62 MOVW a3+12(FP), R2 63 MOVW a4+16(FP), R3 64 MOVW a5+20(FP), R4 65 MOVW a6+24(FP), R5 66 SWI $0x80 67 BCC ok6 68 MOVW $-1, R1 69 MOVW R1, r1+28(FP) // r1 70 MOVW $0, R2 71 MOVW R2, r2+32(FP) // r2 72 MOVW R0, err+36(FP) // err 73 BL runtimeexitsyscall(SB) 74 RET 75 ok6: 76 MOVW R0, r1+28(FP) // r1 77 MOVW R1, r2+32(FP) // r2 78 MOVW $0, R0 79 MOVW R0, err+36(FP) // err 80 BL runtimeexitsyscall(SB) 81 RET 82 83 // func RawSyscall6(trap uintptr, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) 84 TEXT RawSyscall6(SB),NOSPLIT,$0-40 85 MOVW trap+0(FP), R12 // syscall entry 86 MOVW a1+4(FP), R0 87 MOVW a2+8(FP), R1 88 MOVW a3+12(FP), R2 89 MOVW a4+16(FP), R3 90 MOVW a5+20(FP), R4 91 MOVW a6+24(FP), R5 92 SWI $0x80 93 BCC ok2 94 MOVW $-1, R1 95 MOVW R1, r1+28(FP) // r1 96 MOVW $0, R2 97 MOVW R2, r2+32(FP) // r2 98 MOVW R0, err+36(FP) // err 99 RET 100 ok2: 101 MOVW R0, r1+28(FP) // r1 102 MOVW R1, r2+32(FP) // r2 103 MOVW $0, R0 104 MOVW R0, err+36(FP) // err 105 RET 106 107 // Actually Syscall7. 108 TEXT Syscall9(SB),NOSPLIT,$0-52 109 BL runtimeentersyscall(SB) 110 MOVW num+0(FP), R12 // syscall entry 111 MOVW a1+4(FP), R0 112 MOVW a2+8(FP), R1 113 MOVW a3+12(FP), R2 114 MOVW a4+16(FP), R3 115 MOVW a5+20(FP), R4 116 MOVW a6+24(FP), R5 117 MOVW a7+28(FP), R6 118 SWI $0x80 119 BCC ok9 120 MOVW $-1, R1 121 MOVW R1, r1+40(FP) // r1 122 MOVW $0, R2 123 MOVW R2, r2+44(FP) // r2 124 MOVW R0, err+48(FP) // err 125 BL runtimeexitsyscall(SB) 126 RET 127 ok9: 128 MOVW R0, r1+40(FP) // r1 129 MOVW R1, r2+44(FP) // r2 130 MOVW $0, R0 131 MOVW R0, err+48(FP) // err 132 BL runtimeexitsyscall(SB) 133 RET 134
