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 386, Darwin 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 // Trap # in AX, args on stack above caller pc. 15 16 TEXT Syscall(SB),NOSPLIT,$0-28 17 CALL runtimeentersyscall(SB) 18 MOVL trap+0(FP), AX // syscall entry 19 // slide args down on top of system call number 20 LEAL a1+4(FP), SI 21 LEAL trap+0(FP), DI 22 CLD 23 MOVSL 24 MOVSL 25 MOVSL 26 INT $0x80 27 JAE ok 28 MOVL $-1, r1+16(FP) 29 MOVL $-1, r2+20(FP) 30 MOVL AX, err+24(FP) 31 CALL runtimeexitsyscall(SB) 32 RET 33 ok: 34 MOVL AX, r1+16(FP) 35 MOVL DX, r2+20(FP) 36 MOVL $0, err+24(FP) 37 CALL runtimeexitsyscall(SB) 38 RET 39 40 TEXT Syscall6(SB),NOSPLIT,$0-40 41 CALL runtimeentersyscall(SB) 42 MOVL trap+0(FP), AX // syscall entry 43 // slide args down on top of system call number 44 LEAL a1+4(FP), SI 45 LEAL trap+0(FP), DI 46 CLD 47 MOVSL 48 MOVSL 49 MOVSL 50 MOVSL 51 MOVSL 52 MOVSL 53 INT $0x80 54 JAE ok6 55 MOVL $-1, r1+28(FP) 56 MOVL $-1, r2+32(FP) 57 MOVL AX, err+36(FP) 58 CALL runtimeexitsyscall(SB) 59 RET 60 ok6: 61 MOVL AX, r1+28(FP) 62 MOVL DX, r2+32(FP) 63 MOVL $0, err+36(FP) 64 CALL runtimeexitsyscall(SB) 65 RET 66 67 TEXT Syscall9(SB),NOSPLIT,$0-52 68 CALL runtimeentersyscall(SB) 69 MOVL num+0(FP), AX // syscall entry 70 // slide args down on top of system call number 71 LEAL a1+4(FP), SI 72 LEAL num+0(FP), DI 73 CLD 74 MOVSL 75 MOVSL 76 MOVSL 77 MOVSL 78 MOVSL 79 MOVSL 80 MOVSL 81 MOVSL 82 MOVSL 83 INT $0x80 84 JAE ok9 85 MOVL $-1, r1+40(FP) 86 MOVL $-1, r2+44(FP) 87 MOVL AX, err+48(FP) 88 CALL runtimeexitsyscall(SB) 89 RET 90 ok9: 91 MOVL AX, r1+40(FP) 92 MOVL DX, r2+44(FP) 93 MOVL $0, err+48(FP) 94 CALL runtimeexitsyscall(SB) 95 RET 96 97 TEXT RawSyscall(SB),NOSPLIT,$0-28 98 MOVL trap+0(FP), AX // syscall entry 99 // slide args down on top of system call number 100 LEAL a1+4(FP), SI 101 LEAL trap+0(FP), DI 102 CLD 103 MOVSL 104 MOVSL 105 MOVSL 106 INT $0x80 107 JAE ok1 108 MOVL $-1, r1+16(FP) 109 MOVL $-1, r2+20(FP) 110 MOVL AX, err+24(FP) 111 RET 112 ok1: 113 MOVL AX, r1+16(FP) 114 MOVL DX, r2+20(FP) 115 MOVL $0, err+24(FP) 116 RET 117 118 TEXT RawSyscall6(SB),NOSPLIT,$0-40 119 MOVL trap+0(FP), AX // syscall entry 120 // slide args down on top of system call number 121 LEAL a1+4(FP), SI 122 LEAL trap+0(FP), DI 123 CLD 124 MOVSL 125 MOVSL 126 MOVSL 127 MOVSL 128 MOVSL 129 MOVSL 130 INT $0x80 131 JAE ok2 132 MOVL $-1, r1+28(FP) 133 MOVL $-1, r2+32(FP) 134 MOVL AX, err+36(FP) 135 RET 136 ok2: 137 MOVL AX, r1+28(FP) 138 MOVL DX, r2+32(FP) 139 MOVL $0, err+36(FP) 140 RET 141
