File size: 2,801 Bytes
04dc9f2 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 | // Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build freebsd || netbsd
#include "textflag.h"
#include "funcdata.h"
//
// System call support for some 386 unixes
//
// func Syscall(trap int32, a1, a2, a3 int32) (r1, r2, err int32);
// func Syscall6(trap int32, a1, a2, a3, a4, a5, a6 int32) (r1, r2, err int32);
// Trap # in AX, args on stack above caller pc.
TEXT 路Syscall(SB),NOSPLIT,$0-28
CALL runtime路entersyscall(SB)
MOVL trap+0(FP), AX // syscall entry
// slide args down on top of system call number
LEAL a1+4(FP), SI
LEAL trap+0(FP), DI
CLD
MOVSL
MOVSL
MOVSL
INT $0x80
JAE ok
MOVL $-1, r1+16(FP) // r1
MOVL $-1, r2+20(FP) // r2
MOVL AX, err+24(FP) // errno
CALL runtime路exitsyscall(SB)
RET
ok:
MOVL AX, r1+16(FP) // r1
MOVL DX, r2+20(FP) // r2
MOVL $0, err+24(FP) // errno
CALL runtime路exitsyscall(SB)
RET
TEXT 路Syscall6(SB),NOSPLIT,$0-40
CALL runtime路entersyscall(SB)
MOVL trap+0(FP), AX // syscall entry
// slide args down on top of system call number
LEAL a1+4(FP), SI
LEAL trap+0(FP), DI
CLD
MOVSL
MOVSL
MOVSL
MOVSL
MOVSL
MOVSL
INT $0x80
JAE ok6
MOVL $-1, r1+28(FP) // r1
MOVL $-1, r2+32(FP) // r2
MOVL AX, err+36(FP) // errno
CALL runtime路exitsyscall(SB)
RET
ok6:
MOVL AX, r1+28(FP) // r1
MOVL DX, r2+32(FP) // r2
MOVL $0, err+36(FP) // errno
CALL runtime路exitsyscall(SB)
RET
TEXT 路Syscall9(SB),NOSPLIT,$0-52
CALL runtime路entersyscall(SB)
MOVL num+0(FP), AX // syscall entry
// slide args down on top of system call number
LEAL a1+4(FP), SI
LEAL num+0(FP), DI
CLD
MOVSL
MOVSL
MOVSL
MOVSL
MOVSL
MOVSL
MOVSL
MOVSL
MOVSL
INT $0x80
JAE ok9
MOVL $-1, r1+40(FP) // r1
MOVL $-1, r2+44(FP) // r2
MOVL AX, err+48(FP) // errno
CALL runtime路exitsyscall(SB)
RET
ok9:
MOVL AX, r1+40(FP) // r1
MOVL DX, r2+44(FP) // r2
MOVL $0, err+48(FP) // errno
CALL runtime路exitsyscall(SB)
RET
TEXT 路RawSyscall(SB),NOSPLIT,$0-28
MOVL trap+0(FP), AX // syscall entry
// slide args down on top of system call number
LEAL a1+4(FP), SI
LEAL trap+0(FP), DI
CLD
MOVSL
MOVSL
MOVSL
INT $0x80
JAE ok1
MOVL $-1, r1+16(FP) // r1
MOVL $-1, r2+20(FP) // r2
MOVL AX, err+24(FP) // errno
RET
ok1:
MOVL AX, r1+16(FP) // r1
MOVL DX, r2+20(FP) // r2
MOVL $0, err+24(FP) // errno
RET
TEXT 路RawSyscall6(SB),NOSPLIT,$0-40
MOVL trap+0(FP), AX // syscall entry
// slide args down on top of system call number
LEAL a1+4(FP), SI
LEAL trap+0(FP), DI
CLD
MOVSL
MOVSL
MOVSL
MOVSL
MOVSL
MOVSL
INT $0x80
JAE ok2
MOVL $-1, r1+28(FP) // r1
MOVL $-1, r2+32(FP) // r2
MOVL AX, err+36(FP) // errno
RET
ok2:
MOVL AX, r1+28(FP) // r1
MOVL DX, r2+32(FP) // r2
MOVL $0, err+36(FP) // errno
RET
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