mirror of
https://github.com/golang/go
synced 2024-10-04 20:31:22 -06:00
84 lines
1.6 KiB
ArmAsm
84 lines
1.6 KiB
ArmAsm
|
// 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.
|
||
|
|
||
|
//
|
||
|
// System call support for 386, Darwin
|
||
|
//
|
||
|
|
||
|
// 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·Syscall(SB),7,$0
|
||
|
CALL sys·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 sys·exitsyscall(SB)
|
||
|
RET
|
||
|
ok:
|
||
|
MOVL AX, 20(SP) // r1
|
||
|
MOVL DX, 24(SP) // r2 ???
|
||
|
MOVL $0, 28(SP) // errno
|
||
|
CALL sys·exitsyscall(SB)
|
||
|
RET
|
||
|
|
||
|
TEXT syscall·Syscall6(SB),7,$0
|
||
|
CALL sys·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 ok
|
||
|
MOVL $-1, 32(SP) // r1
|
||
|
MOVL $-1, 36(SP) // r2
|
||
|
MOVL AX, 40(SP) // errno
|
||
|
CALL sys·exitsyscall(SB)
|
||
|
RET
|
||
|
ok6:
|
||
|
MOVL AX, 32(SP) // r1
|
||
|
MOVL DX, 36(SP) // r2 ???
|
||
|
MOVL $0, 40(SP) // errno
|
||
|
CALL sys·exitsyscall(SB)
|
||
|
RET
|
||
|
|
||
|
TEXT syscall·RawSyscall(SB),7,$0
|
||
|
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
|