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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" // TODO: how to refer to this?
- //
- // 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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