1 // Copyright 2013 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 #include "funcdata.h" 7 8 // 9 // System call support for ARM, NetBSD 10 // 11 12 // func Syscall(trap int32, a1, a2, a3 int32) (r1, r2, err int32); 13 // func Syscall6(trap int32, a1, a2, a3, a4, a5, a6 int32) (r1, r2, err int32); 14 // func Syscall9(trap int32, a1, a2, a3, a4, a5, a6, a7, a8, a9 int64) (r1, r2, err int32) 15 16 TEXT Syscall(SB),NOSPLIT,$0-28 17 BL runtimeentersyscall(SB) 18 MOVW trap+0(FP), R0 // sigcall num 19 MOVW a1+4(FP), R1 // a1 20 MOVW a2+8(FP), R2 // a2 21 MOVW a3+12(FP), R3 // a3 22 SWI $0 // syscall 23 MOVW $0, R2 24 BCS error 25 MOVW R0, r1+16(FP) // r1 26 MOVW R1, r2+20(FP) // r2 27 MOVW R2, err+24(FP) // err 28 BL runtimeexitsyscall(SB) 29 RET 30 error: 31 MOVW $-1, R3 32 MOVW R3, r1+16(FP) // r1 33 MOVW R2, r2+20(FP) // r2 34 MOVW R0, err+24(FP) // err 35 BL runtimeexitsyscall(SB) 36 RET 37 38 TEXT Syscall6(SB),NOSPLIT,$0-40 39 BL runtimeentersyscall(SB) 40 MOVW trap+0(FP), R0 // sigcall num 41 MOVW a1+4(FP), R1 // a1 42 MOVW a2+8(FP), R2 // a2 43 MOVW a3+12(FP), R3 // a3 44 MOVW R13, R4 45 MOVW $a4+16(FP), R13 // a4 to a6 are passed on stack 46 SWI $0 // syscall 47 MOVW R4, R13 48 MOVW $0, R2 49 BCS error6 50 MOVW R0, r1+28(FP) // r1 51 MOVW R1, r2+32(FP) // r2 52 MOVW R2, err+36(FP) // err 53 BL runtimeexitsyscall(SB) 54 RET 55 error6: 56 MOVW $-1, R3 57 MOVW R3, r1+28(FP) // r1 58 MOVW R2, r2+32(FP) // r2 59 MOVW R0, err+36(FP) // err 60 BL runtimeexitsyscall(SB) 61 RET 62 63 TEXT Syscall9(SB),NOSPLIT,$0-52 64 BL runtimeentersyscall(SB) 65 MOVW trap+0(FP), R0 // sigcall num 66 MOVW a1+4(FP), R1 // a1 67 MOVW a2+8(FP), R2 // a2 68 MOVW a3+12(FP), R3 // a3 69 MOVW R13, R4 70 MOVW $a4+16(FP), R13 // a4 to a9 are passed on stack 71 SWI $0 // syscall 72 MOVW R4, R13 73 MOVW $0, R2 74 BCS error9 75 MOVW R0, r1+40(FP) // r1 76 MOVW R1, r2+44(FP) // r2 77 MOVW R2, err+48(FP) // err 78 BL runtimeexitsyscall(SB) 79 RET 80 error9: 81 MOVW $-1, R3 82 MOVW R3, r1+40(FP) // r1 83 MOVW R2, r2+44(FP) // r2 84 MOVW R0, err+48(FP) // err 85 BL runtimeexitsyscall(SB) 86 RET 87 88 TEXT RawSyscall(SB),NOSPLIT,$0-28 89 MOVW trap+0(FP), R0 // sigcall num 90 MOVW a1+4(FP), R1 // a1 91 MOVW a2+8(FP), R2 // a2 92 MOVW a3+12(FP), R3 // a3 93 SWI $0 // syscall 94 MOVW $0, R2 95 BCS errorr 96 MOVW R0, r1+16(FP) // r1 97 MOVW R1, r2+20(FP) // r2 98 MOVW R2, err+24(FP) // err 99 RET 100 errorr: 101 MOVW $-1, R3 102 MOVW R3, r1+16(FP) // r1 103 MOVW R2, r2+20(FP) // r2 104 MOVW R0, err+24(FP) // err 105 RET 106 107 TEXT RawSyscall6(SB),NOSPLIT,$0-40 108 MOVW trap+0(FP), R0 // sigcall num 109 MOVW a1+4(FP), R1 // a1 110 MOVW a2+8(FP), R2 // a2 111 MOVW a3+12(FP), R3 // a3 112 MOVW R13, R4 113 MOVW $a4+16(FP), R13 // a4 to a9 are passed on stack 114 SWI $0 // syscall 115 MOVW R4, R13 116 MOVW $0, R2 117 BCS errorr6 118 MOVW R0, r1+28(FP) // r1 119 MOVW R1, r2+32(FP) // r2 120 MOVW R2, err+36(FP) // err 121 RET 122 errorr6: 123 MOVW $-1, R3 124 MOVW R3, r1+28(FP) // r1 125 MOVW R2, r2+32(FP) // r2 126 MOVW R0, err+36(FP) // err 127 RET 128
