mirror of
https://github.com/rwinkhart/sys.git
synced 2026-08-28 21:06:47 -04:00
Rob Pike
20acc5cf31
This CL copies to each package of go.sys the files from syscall it will need.
Different directories have different files, but these:
mkall.sh
str.go
syscall.go
mksyscall.pl
race.go
race0.go
syscall_test.go
are copied to all three.
No changes yet, these are just copies. They are not ready to use yet:
package names are wrong, for starters. But this clean copy will make
it easier to follow the changes as the packages are enabled.
LGTM=rsc
R=golang-codereviews, rsc
CC=golang-codereviews
https://golang.org/cl/126960043
127 lines
2.5 KiB
ArmAsm
127 lines
2.5 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"
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//
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// System calls for AMD64, Linux
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//
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// func Syscall(trap int64, a1, a2, a3 int64) (r1, r2, err int64);
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// Trap # in AX, args in DI SI DX R10 R8 R9, return in AX DX
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// Note that this differs from "standard" ABI convention, which
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// would pass 4th arg in CX, not R10.
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TEXT ·Syscall(SB),NOSPLIT,$0-56
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CALL runtime·entersyscall(SB)
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MOVQ 16(SP), DI
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MOVQ 24(SP), SI
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MOVQ 32(SP), DX
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MOVQ $0, R10
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MOVQ $0, R8
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MOVQ $0, R9
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MOVQ 8(SP), AX // syscall entry
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SYSCALL
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CMPQ AX, $0xfffffffffffff001
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JLS ok
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MOVQ $-1, 40(SP) // r1
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MOVQ $0, 48(SP) // r2
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NEGQ AX
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MOVQ AX, 56(SP) // errno
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CALL runtime·exitsyscall(SB)
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RET
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ok:
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MOVQ AX, 40(SP) // r1
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MOVQ DX, 48(SP) // r2
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MOVQ $0, 56(SP) // errno
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CALL runtime·exitsyscall(SB)
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RET
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TEXT ·Syscall6(SB),NOSPLIT,$0-80
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CALL runtime·entersyscall(SB)
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MOVQ 16(SP), DI
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MOVQ 24(SP), SI
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MOVQ 32(SP), DX
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MOVQ 40(SP), R10
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MOVQ 48(SP), R8
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MOVQ 56(SP), R9
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MOVQ 8(SP), AX // syscall entry
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SYSCALL
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CMPQ AX, $0xfffffffffffff001
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JLS ok6
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MOVQ $-1, 64(SP) // r1
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MOVQ $0, 72(SP) // r2
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NEGQ AX
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MOVQ AX, 80(SP) // errno
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CALL runtime·exitsyscall(SB)
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RET
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ok6:
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MOVQ AX, 64(SP) // r1
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MOVQ DX, 72(SP) // r2
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MOVQ $0, 80(SP) // errno
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CALL runtime·exitsyscall(SB)
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RET
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TEXT ·RawSyscall(SB),NOSPLIT,$0-56
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MOVQ 16(SP), DI
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MOVQ 24(SP), SI
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MOVQ 32(SP), DX
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MOVQ $0, R10
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MOVQ $0, R8
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MOVQ $0, R9
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MOVQ 8(SP), AX // syscall entry
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SYSCALL
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CMPQ AX, $0xfffffffffffff001
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JLS ok1
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MOVQ $-1, 40(SP) // r1
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MOVQ $0, 48(SP) // r2
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NEGQ AX
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MOVQ AX, 56(SP) // errno
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RET
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ok1:
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MOVQ AX, 40(SP) // r1
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MOVQ DX, 48(SP) // r2
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MOVQ $0, 56(SP) // errno
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RET
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TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
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MOVQ 16(SP), DI
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MOVQ 24(SP), SI
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MOVQ 32(SP), DX
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MOVQ 40(SP), R10
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MOVQ 48(SP), R8
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MOVQ 56(SP), R9
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MOVQ 8(SP), AX // syscall entry
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SYSCALL
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CMPQ AX, $0xfffffffffffff001
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JLS ok2
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MOVQ $-1, 64(SP) // r1
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MOVQ $0, 72(SP) // r2
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NEGQ AX
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MOVQ AX, 80(SP) // errno
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RET
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ok2:
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MOVQ AX, 64(SP) // r1
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MOVQ DX, 72(SP) // r2
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MOVQ $0, 80(SP) // errno
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RET
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TEXT ·gettimeofday(SB),NOSPLIT,$0-16
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MOVQ 8(SP), DI
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MOVQ $0, SI
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MOVQ runtime·__vdso_gettimeofday_sym(SB), AX
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CALL AX
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CMPQ AX, $0xfffffffffffff001
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JLS ok7
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NEGQ AX
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MOVQ AX, 16(SP) // errno
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RET
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ok7:
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MOVQ $0, 16(SP) // errno
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RET
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