root/src/pkg/syscall/asm_dragonfly_386.s

// 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.

#include "../../cmd/ld/textflag.h"

//
// System call support for 386, FreeBSD
//

// 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    ·Syscall(SB),NOSPLIT,$0-32
        CALL    runtime·entersyscall(SB)
        MOVL    4(SP), AX       // syscall entry
        // slide args down on top of system call number
        LEAL            8(SP), SI
        LEAL            4(SP), DI
        CLD
        MOVSL
        MOVSL
        MOVSL
        INT     $0x80
        JAE     ok
        MOVL    $-1, 20(SP)     // r1
        MOVL    $-1, 24(SP)     // r2
        MOVL    AX, 28(SP)              // errno
        CALL    runtime·exitsyscall(SB)
        RET
ok:
        MOVL    AX, 20(SP)      // r1
        MOVL    DX, 24(SP)      // r2
        MOVL    $0, 28(SP)      // errno
        CALL    runtime·exitsyscall(SB)
        RET

TEXT    ·Syscall6(SB),NOSPLIT,$0-44
        CALL    runtime·entersyscall(SB)
        MOVL    4(SP), AX       // syscall entry
        // slide args down on top of system call number
        LEAL            8(SP), SI
        LEAL            4(SP), DI
        CLD
        MOVSL
        MOVSL
        MOVSL
        MOVSL
        MOVSL
        MOVSL
        INT     $0x80
        JAE     ok6
        MOVL    $-1, 32(SP)     // r1
        MOVL    $-1, 36(SP)     // r2
        MOVL    AX, 40(SP)              // errno
        CALL    runtime·exitsyscall(SB)
        RET
ok6:
        MOVL    AX, 32(SP)      // r1
        MOVL    DX, 36(SP)      // r2
        MOVL    $0, 40(SP)      // errno
        CALL    runtime·exitsyscall(SB)
        RET

TEXT    ·Syscall9(SB),NOSPLIT,$0-56
        CALL    runtime·entersyscall(SB)
        MOVL    4(SP), AX       // syscall entry
        // slide args down on top of system call number
        LEAL            8(SP), SI
        LEAL            4(SP), DI
        CLD
        MOVSL
        MOVSL
        MOVSL
        MOVSL
        MOVSL
        MOVSL
        MOVSL
        MOVSL
        MOVSL
        INT     $0x80
        JAE     ok9
        MOVL    $-1, 44(SP)     // r1
        MOVL    $-1, 48(SP)     // r2
        MOVL    AX, 52(SP)              // errno
        CALL    runtime·exitsyscall(SB)
        RET
ok9:
        MOVL    AX, 44(SP)      // r1
        MOVL    DX, 48(SP)      // r2
        MOVL    $0, 52(SP)      // errno
        CALL    runtime·exitsyscall(SB)
        RET

TEXT ·RawSyscall(SB),NOSPLIT,$0-32
        MOVL    4(SP), AX       // syscall entry
        // slide args down on top of system call number
        LEAL            8(SP), SI
        LEAL            4(SP), DI
        CLD
        MOVSL
        MOVSL
        MOVSL
        INT     $0x80
        JAE     ok1
        MOVL    $-1, 20(SP)     // r1
        MOVL    $-1, 24(SP)     // r2
        MOVL    AX, 28(SP)              // errno
        RET
ok1:
        MOVL    AX, 20(SP)      // r1
        MOVL    DX, 24(SP)      // r2
        MOVL    $0, 28(SP)      // errno
        RET

TEXT    ·RawSyscall6(SB),NOSPLIT,$0-44
        MOVL    4(SP), AX       // syscall entry
        // slide args down on top of system call number
        LEAL            8(SP), SI
        LEAL            4(SP), DI
        CLD
        MOVSL
        MOVSL
        MOVSL
        MOVSL
        MOVSL
        MOVSL
        INT     $0x80
        JAE     ok2
        MOVL    $-1, 32(SP)     // r1
        MOVL    $-1, 36(SP)     // r2
        MOVL    AX, 40(SP)              // errno
        RET
ok2:
        MOVL    AX, 32(SP)      // r1
        MOVL    DX, 36(SP)      // r2
        MOVL    $0, 40(SP)      // errno
        RET