mirror of
https://github.com/rwinkhart/sys.git
synced 2026-08-27 20:36:31 -04:00
Rob Pike
8442dd2c63
Semi-automatic migration from package syscall to package {plan9,windows,unix}.
No builds attempted yet, but this gets a lot of noise behind us so subsequent
CLs will be more concise and easier to follow.
Subsequent CLs will have semantic content.
LGTM=rsc
R=golang-codereviews, rsc
CC=golang-codereviews
https://golang.org/cl/121520043
143 lines
2.7 KiB
ArmAsm
143 lines
2.7 KiB
ArmAsm
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// TODO(rsc): Rewrite all nn(SP) references into name+(nn-8)(FP)
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// so that go vet can check that they are correct.
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#include "../../cmd/ld/textflag.h" // TODO: how to refer to this?
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//
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// System call support for 386, NetBSD
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//
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// func Syscall(trap int32, a1, a2, a3 int32) (r1, r2, err int32);
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// func Syscall6(trap int32, a1, a2, a3, a4, a5, a6 int32) (r1, r2, err int32);
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// Trap # in AX, args on stack above caller pc.
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TEXT ·Syscall(SB),NOSPLIT,$0-28
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CALL runtime·entersyscall(SB)
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MOVL 4(SP), AX // syscall entry
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// slide args down on top of system call number
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LEAL 8(SP), SI
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LEAL 4(SP), DI
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CLD
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MOVSL
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MOVSL
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MOVSL
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INT $0x80
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JAE ok
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MOVL $-1, 20(SP) // r1
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MOVL $-1, 24(SP) // r2
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MOVL AX, 28(SP) // errno
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CALL runtime·exitsyscall(SB)
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RET
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ok:
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MOVL AX, 20(SP) // r1
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MOVL DX, 24(SP) // r2
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MOVL $0, 28(SP) // errno
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CALL runtime·exitsyscall(SB)
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RET
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TEXT ·Syscall6(SB),NOSPLIT,$0-40
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CALL runtime·entersyscall(SB)
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MOVL 4(SP), AX // syscall entry
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// slide args down on top of system call number
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LEAL 8(SP), SI
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LEAL 4(SP), DI
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CLD
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MOVSL
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MOVSL
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MOVSL
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MOVSL
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MOVSL
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MOVSL
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INT $0x80
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JAE ok6
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MOVL $-1, 32(SP) // r1
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MOVL $-1, 36(SP) // r2
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MOVL AX, 40(SP) // errno
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CALL runtime·exitsyscall(SB)
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RET
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ok6:
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MOVL AX, 32(SP) // r1
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MOVL DX, 36(SP) // r2
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MOVL $0, 40(SP) // errno
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CALL runtime·exitsyscall(SB)
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RET
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TEXT ·Syscall9(SB),NOSPLIT,$0-52
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CALL runtime·entersyscall(SB)
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MOVL 4(SP), AX // syscall entry
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// slide args down on top of system call number
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LEAL 8(SP), SI
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LEAL 4(SP), DI
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CLD
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MOVSL
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MOVSL
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MOVSL
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MOVSL
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MOVSL
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MOVSL
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MOVSL
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MOVSL
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MOVSL
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INT $0x80
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JAE ok9
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MOVL $-1, 44(SP) // r1
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MOVL $-1, 48(SP) // r2
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MOVL AX, 52(SP) // errno
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CALL runtime·exitsyscall(SB)
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RET
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ok9:
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MOVL AX, 44(SP) // r1
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MOVL DX, 48(SP) // r2
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MOVL $0, 52(SP) // errno
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CALL runtime·exitsyscall(SB)
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RET
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TEXT ·RawSyscall(SB),NOSPLIT,$0-28
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MOVL 4(SP), AX // syscall entry
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// slide args down on top of system call number
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LEAL 8(SP), SI
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LEAL 4(SP), DI
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CLD
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MOVSL
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MOVSL
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MOVSL
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INT $0x80
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JAE ok1
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MOVL $-1, 20(SP) // r1
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MOVL $-1, 24(SP) // r2
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MOVL AX, 28(SP) // errno
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RET
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ok1:
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MOVL AX, 20(SP) // r1
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MOVL DX, 24(SP) // r2
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MOVL $0, 28(SP) // errno
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RET
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TEXT ·RawSyscall6(SB),NOSPLIT,$0-40
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MOVL 4(SP), AX // syscall entry
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// slide args down on top of system call number
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LEAL 8(SP), SI
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LEAL 4(SP), DI
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CLD
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MOVSL
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MOVSL
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MOVSL
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MOVSL
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MOVSL
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MOVSL
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INT $0x80
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JAE ok2
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MOVL $-1, 32(SP) // r1
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MOVL $-1, 36(SP) // r2
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MOVL AX, 40(SP) // errno
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RET
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ok2:
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MOVL AX, 32(SP) // r1
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MOVL DX, 36(SP) // r2
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MOVL $0, 40(SP) // errno
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RET
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