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 // +build linux 6 // +build mips mipsle 7 8 #include "textflag.h" 9 #include "funcdata.h" 10 11 // 12 // System calls for mips, Linux 13 // 14 15 // func Syscall(trap uintptr, a1, a2, a3 uintptr) (r1, r2, err uintptr); 16 17 TEXT Syscall(SB),NOSPLIT,$0-28 18 JAL runtimeentersyscall(SB) 19 MOVW a1+4(FP), R4 20 MOVW a2+8(FP), R5 21 MOVW a3+12(FP), R6 22 MOVW R0, R7 23 MOVW trap+0(FP), R2 // syscall entry 24 SYSCALL 25 BEQ R7, ok 26 MOVW $-1, R1 27 MOVW R1, r1+16(FP) // r1 28 MOVW R0, r2+20(FP) // r2 29 MOVW R2, err+24(FP) // errno 30 JAL runtimeexitsyscall(SB) 31 RET 32 ok: 33 MOVW R2, r1+16(FP) // r1 34 MOVW R3, r2+20(FP) // r2 35 MOVW R0, err+24(FP) // errno 36 JAL runtimeexitsyscall(SB) 37 RET 38 39 40 // func Syscall6(trap trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr); 41 // 5th and 6th arg go at sp+16, sp+20. 42 // Note that frame size of 20 means that 24 bytes gets reserved on stack. 43 TEXT Syscall6(SB),NOSPLIT,$20-40 44 NO_LOCAL_POINTERS 45 JAL runtimeentersyscall(SB) 46 MOVW a1+4(FP), R4 47 MOVW a2+8(FP), R5 48 MOVW a3+12(FP), R6 49 MOVW a4+16(FP), R7 50 MOVW a5+20(FP), R8 51 MOVW a6+24(FP), R9 52 MOVW R8, 16(R29) 53 MOVW R9, 20(R29) 54 MOVW trap+0(FP), R2 // syscall entry 55 SYSCALL 56 BEQ R7, ok6 57 MOVW $-1, R1 58 MOVW R1, r1+28(FP) // r1 59 MOVW R0, r2+32(FP) // r2 60 MOVW R2, err+36(FP) // errno 61 JAL runtimeexitsyscall(SB) 62 RET 63 ok6: 64 MOVW R2, r1+28(FP) // r1 65 MOVW R3, r2+32(FP) // r2 66 MOVW R0, err+36(FP) // errno 67 JAL runtimeexitsyscall(SB) 68 RET 69 70 // func Syscall9(trap trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2, err uintptr); 71 // Actually Syscall8 but the rest of the code expects it to be named Syscall9. 72 TEXT Syscall9(SB),NOSPLIT,$28-52 73 NO_LOCAL_POINTERS 74 JAL runtimeentersyscall(SB) 75 MOVW a1+4(FP), R4 76 MOVW a2+8(FP), R5 77 MOVW a3+12(FP), R6 78 MOVW a4+16(FP), R7 79 MOVW a5+20(FP), R8 80 MOVW a6+24(FP), R9 81 MOVW a7+28(FP), R10 82 MOVW a8+32(FP), R11 83 MOVW R8, 16(R29) 84 MOVW R9, 20(R29) 85 MOVW R10, 24(R29) 86 MOVW R11, 28(R29) 87 MOVW trap+0(FP), R2 // syscall entry 88 SYSCALL 89 BEQ R7, ok9 90 MOVW $-1, R1 91 MOVW R1, r1+40(FP) // r1 92 MOVW R0, r2+44(FP) // r2 93 MOVW R2, err+48(FP) // errno 94 JAL runtimeexitsyscall(SB) 95 RET 96 ok9: 97 MOVW R2, r1+40(FP) // r1 98 MOVW R3, r2+44(FP) // r2 99 MOVW R0, err+48(FP) // errno 100 JAL runtimeexitsyscall(SB) 101 RET 102 103 TEXT RawSyscall(SB),NOSPLIT,$24-28 104 MOVW a1+4(FP), R4 105 MOVW a2+8(FP), R5 106 MOVW a3+12(FP), R6 107 MOVW trap+0(FP), R2 // syscall entry 108 SYSCALL 109 BEQ R7, ok1 110 MOVW $-1, R1 111 MOVW R1, r1+16(FP) // r1 112 MOVW R0, r2+20(FP) // r2 113 MOVW R2, err+24(FP) // errno 114 RET 115 ok1: 116 MOVW R2, r1+16(FP) // r1 117 MOVW R3, r2+20(FP) // r2 118 MOVW R0, err+24(FP) // errno 119 RET 120 121 TEXT RawSyscall6(SB),NOSPLIT,$20-40 122 MOVW a1+4(FP), R4 123 MOVW a2+8(FP), R5 124 MOVW a3+12(FP), R6 125 MOVW a4+16(FP), R7 126 MOVW a5+20(FP), R8 127 MOVW a6+24(FP), R9 128 MOVW R8, 16(R29) 129 MOVW R9, 20(R29) 130 MOVW trap+0(FP), R2 // syscall entry 131 SYSCALL 132 BEQ R7, ok2 133 MOVW $-1, R1 134 MOVW R1, r1+28(FP) // r1 135 MOVW R0, r2+32(FP) // r2 136 MOVW R2, err+36(FP) // errno 137 RET 138 ok2: 139 MOVW R2, r1+28(FP) // r1 140 MOVW R3, r2+32(FP) // r2 141 MOVW R0, err+36(FP) // errno 142 RET 143
