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// 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.
// TODO(rsc): Rewrite all nn(SP) references into name+(nn-8)(FP)
// so that go vet can check that they are correct.
#include "../../cmd/ld/textflag.h"
//
// System call support for 386, OpenBSD
//
// 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,$0-28
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,$0-40
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,$0-52
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,$0-28
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,$0-40
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
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