1 // Copyright 2016 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 calls for s390x, Linux 9 // 10 11 // func Syscall(trap int64, a1, a2, a3 int64) (r1, r2, err int64) 12 TEXT Syscall(SB),NOSPLIT,$0-56 13 BL runtimeentersyscall(SB) 14 MOVD a1+8(FP), R2 15 MOVD a2+16(FP), R3 16 MOVD a3+24(FP), R4 17 MOVD $0, R5 18 MOVD $0, R6 19 MOVD $0, R7 20 MOVD trap+0(FP), R1 // syscall entry 21 SYSCALL 22 MOVD $0xfffffffffffff001, R8 23 CMPUBLT R2, R8, ok 24 MOVD $-1, r1+32(FP) 25 MOVD $0, r2+40(FP) 26 NEG R2, R2 27 MOVD R2, err+48(FP) // errno 28 BL runtimeexitsyscall(SB) 29 RET 30 ok: 31 MOVD R2, r1+32(FP) 32 MOVD R3, r2+40(FP) 33 MOVD $0, err+48(FP) // errno 34 BL runtimeexitsyscall(SB) 35 RET 36 37 // func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) 38 TEXT Syscall6(SB),NOSPLIT,$0-80 39 BL runtimeentersyscall(SB) 40 MOVD a1+8(FP), R2 41 MOVD a2+16(FP), R3 42 MOVD a3+24(FP), R4 43 MOVD a4+32(FP), R5 44 MOVD a5+40(FP), R6 45 MOVD a6+48(FP), R7 46 MOVD trap+0(FP), R1 // syscall entry 47 SYSCALL 48 MOVD $0xfffffffffffff001, R8 49 CMPUBLT R2, R8, ok6 50 MOVD $-1, r1+56(FP) 51 MOVD $0, r2+64(FP) 52 NEG R2, R2 53 MOVD R2, err+72(FP) // errno 54 BL runtimeexitsyscall(SB) 55 RET 56 ok6: 57 MOVD R2, r1+56(FP) 58 MOVD R3, r2+64(FP) 59 MOVD $0, err+72(FP) // errno 60 BL runtimeexitsyscall(SB) 61 RET 62 63 // func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr) 64 TEXT RawSyscall(SB),NOSPLIT,$0-56 65 MOVD a1+8(FP), R2 66 MOVD a2+16(FP), R3 67 MOVD a3+24(FP), R4 68 MOVD $0, R5 69 MOVD $0, R6 70 MOVD $0, R7 71 MOVD trap+0(FP), R1 // syscall entry 72 SYSCALL 73 MOVD $0xfffffffffffff001, R8 74 CMPUBLT R2, R8, ok1 75 MOVD $-1, r1+32(FP) 76 MOVD $0, r2+40(FP) 77 NEG R2, R2 78 MOVD R2, err+48(FP) // errno 79 RET 80 ok1: 81 MOVD R2, r1+32(FP) 82 MOVD R3, r2+40(FP) 83 MOVD $0, err+48(FP) // errno 84 RET 85 86 // func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) 87 TEXT RawSyscall6(SB),NOSPLIT,$0-80 88 MOVD a1+8(FP), R2 89 MOVD a2+16(FP), R3 90 MOVD a3+24(FP), R4 91 MOVD a4+32(FP), R5 92 MOVD a5+40(FP), R6 93 MOVD a6+48(FP), R7 94 MOVD trap+0(FP), R1 // syscall entry 95 SYSCALL 96 MOVD $0xfffffffffffff001, R8 97 CMPUBLT R2, R8, ok2 98 MOVD $-1, r1+56(FP) 99 MOVD $0, r2+64(FP) 100 NEG R2, R2 101 MOVD R2, err+72(FP) // errno 102 RET 103 ok2: 104 MOVD R2, r1+56(FP) 105 MOVD R3, r2+64(FP) 106 MOVD $0, err+72(FP) // errno 107 RET 108 109 #define SYS_SOCKETCALL 102 /* from zsysnum_linux_s390x.go */ 110 111 // func socketcall(call int, a0, a1, a2, a3, a4, a5 uintptr) (n int, err int) 112 // Kernel interface gets call sub-number and pointer to a0. 113 TEXT socketcall(SB),NOSPLIT,$0-72 114 BL runtimeentersyscall(SB) 115 MOVD $SYS_SOCKETCALL, R1 // syscall entry 116 MOVD call+0(FP), R2 // socket call number 117 MOVD $a0+8(FP), R3 // pointer to call arguments 118 MOVD $0, R4 119 MOVD $0, R5 120 MOVD $0, R6 121 MOVD $0, R7 122 SYSCALL 123 MOVD $0xfffffffffffff001, R8 124 CMPUBLT R2, R8, oksock 125 MOVD $-1, n+56(FP) 126 NEG R2, R2 127 MOVD R2, err+64(FP) 128 BL runtimeexitsyscall(SB) 129 RET 130 oksock: 131 MOVD R2, n+56(FP) 132 MOVD $0, err+64(FP) 133 CALL runtimeexitsyscall(SB) 134 RET 135 136 // func rawsocketcall(call int, a0, a1, a2, a3, a4, a5 uintptr) (n int, err int) 137 // Kernel interface gets call sub-number and pointer to a0. 138 TEXT rawsocketcall(SB),NOSPLIT,$0-72 139 MOVD $SYS_SOCKETCALL, R1 // syscall entry 140 MOVD call+0(FP), R2 // socket call number 141 MOVD $a0+8(FP), R3 // pointer to call arguments 142 MOVD $0, R4 143 MOVD $0, R5 144 MOVD $0, R6 145 MOVD $0, R7 146 SYSCALL 147 MOVD $0xfffffffffffff001, R8 148 CMPUBLT R2, R8, oksock1 149 MOVD $-1, n+56(FP) 150 NEG R2, R2 151 MOVD R2, err+64(FP) 152 RET 153 oksock1: 154 MOVD R2, n+56(FP) 155 MOVD $0, err+64(FP) 156 RET 157
