1 // Copyright 2009 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 AMD64, Darwin 10 // 11 12 // Trap # in AX, args in DI SI DX, return in AX DX 13 14 // func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno); 15 TEXT Syscall(SB),NOSPLIT,$0-56 16 CALL runtimeentersyscall(SB) 17 MOVQ a1+8(FP), DI 18 MOVQ a2+16(FP), SI 19 MOVQ a3+24(FP), DX 20 MOVQ $0, R10 21 MOVQ $0, R8 22 MOVQ $0, R9 23 MOVQ trap+0(FP), AX // syscall entry 24 ADDQ $0x2000000, AX 25 SYSCALL 26 JCC ok 27 MOVQ $-1, r1+32(FP) 28 MOVQ $0, r2+40(FP) 29 MOVQ AX, err+48(FP) 30 CALL runtimeexitsyscall(SB) 31 RET 32 ok: 33 MOVQ AX, r1+32(FP) 34 MOVQ DX, r2+40(FP) 35 MOVQ $0, err+48(FP) 36 CALL runtimeexitsyscall(SB) 37 RET 38 39 // func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno); 40 TEXT Syscall6(SB),NOSPLIT,$0-80 41 CALL runtimeentersyscall(SB) 42 MOVQ a1+8(FP), DI 43 MOVQ a2+16(FP), SI 44 MOVQ a3+24(FP), DX 45 MOVQ a4+32(FP), R10 46 MOVQ a5+40(FP), R8 47 MOVQ a6+48(FP), R9 48 MOVQ trap+0(FP), AX // syscall entry 49 ADDQ $0x2000000, AX 50 SYSCALL 51 JCC ok6 52 MOVQ $-1, r1+56(FP) 53 MOVQ $0, r2+64(FP) 54 MOVQ AX, err+72(FP) 55 CALL runtimeexitsyscall(SB) 56 RET 57 ok6: 58 MOVQ AX, r1+56(FP) 59 MOVQ DX, r2+64(FP) 60 MOVQ $0, err+72(FP) 61 CALL runtimeexitsyscall(SB) 62 RET 63 64 // func Syscall9(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno) 65 TEXT Syscall9(SB),NOSPLIT,$0-104 66 CALL runtimeentersyscall(SB) 67 MOVQ trap+0(FP), AX // syscall entry 68 MOVQ a1+8(FP), DI 69 MOVQ a2+16(FP), SI 70 MOVQ a3+24(FP), DX 71 MOVQ a4+32(FP), R10 72 MOVQ a5+40(FP), R8 73 MOVQ a6+48(FP), R9 74 MOVQ a7+56(FP), R11 75 MOVQ a8+64(FP), R12 76 MOVQ a9+72(FP), R13 77 SUBQ $32, SP 78 MOVQ R11, 8(SP) 79 MOVQ R12, 16(SP) 80 MOVQ R13, 24(SP) 81 ADDQ $0x2000000, AX 82 SYSCALL 83 JCC ok9 84 ADDQ $32, SP 85 MOVQ $-1, r1+80(FP) 86 MOVQ $0, r2+88(FP) 87 MOVQ AX, err+96(FP) 88 CALL runtimeexitsyscall(SB) 89 RET 90 ok9: 91 ADDQ $32, SP 92 MOVQ AX, r1+80(FP) 93 MOVQ DX, r2+88(FP) 94 MOVQ $0, err+96(FP) 95 CALL runtimeexitsyscall(SB) 96 RET 97 98 // func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) 99 TEXT RawSyscall(SB),NOSPLIT,$0-56 100 MOVQ a1+8(FP), DI 101 MOVQ a2+16(FP), SI 102 MOVQ a3+24(FP), DX 103 MOVQ $0, R10 104 MOVQ $0, R8 105 MOVQ $0, R9 106 MOVQ trap+0(FP), AX // syscall entry 107 ADDQ $0x2000000, AX 108 SYSCALL 109 JCC ok1 110 MOVQ $-1, r1+32(FP) 111 MOVQ $0, r2+40(FP) 112 MOVQ AX, err+48(FP) 113 RET 114 ok1: 115 MOVQ AX, r1+32(FP) 116 MOVQ DX, r2+40(FP) 117 MOVQ $0, err+48(FP) 118 RET 119 120 // func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) 121 TEXT RawSyscall6(SB),NOSPLIT,$0-80 122 MOVQ a1+8(FP), DI 123 MOVQ a2+16(FP), SI 124 MOVQ a3+24(FP), DX 125 MOVQ a4+32(FP), R10 126 MOVQ a5+40(FP), R8 127 MOVQ a6+48(FP), R9 128 MOVQ trap+0(FP), AX // syscall entry 129 ADDQ $0x2000000, AX 130 SYSCALL 131 JCC ok2 132 MOVQ $-1, r1+56(FP) 133 MOVQ $0, r2+64(FP) 134 MOVQ AX, err+72(FP) 135 RET 136 ok2: 137 MOVQ AX, r1+56(FP) 138 MOVQ DX, r2+64(FP) 139 MOVQ $0, err+72(FP) 140 RET 141
