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syscall: add assembly for Linux on s390x
Change-Id: I42ade65a91f3effc03dd663ee449410baa9f8ca8 Reviewed-on: https://go-review.googlesource.com/21740 Reviewed-by: Bill O'Farrell <billotosyr@gmail.com> Reviewed-by: Minux Ma <minux@golang.org> Run-TryBot: Minux Ma <minux@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Michael Munday
Brad Fitzpatrick
parent
59d186832b
commit
6c5352f181
156
src/syscall/asm_linux_s390x.s
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156
src/syscall/asm_linux_s390x.s
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@ -0,0 +1,156 @@
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// Copyright 2016 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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#include "textflag.h"
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//
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// System calls for s390x, 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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TEXT ·Syscall(SB),NOSPLIT,$0-56
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BL runtime·entersyscall(SB)
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MOVD a1+8(FP), R2
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MOVD a2+16(FP), R3
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MOVD a3+24(FP), R4
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MOVD $0, R5
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MOVD $0, R6
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MOVD $0, R7
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MOVD trap+0(FP), R1 // syscall entry
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SYSCALL
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MOVD $0xfffffffffffff001, R8
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CMPUBLT R2, R8, ok
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MOVD $-1, r1+32(FP)
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MOVD $0, r2+40(FP)
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NEG R2, R2
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MOVD R2, err+48(FP) // errno
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BL runtime·exitsyscall(SB)
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RET
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ok:
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MOVD R2, r1+32(FP)
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MOVD R3, r2+40(FP)
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MOVD $0, err+48(FP) // errno
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BL runtime·exitsyscall(SB)
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RET
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// func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
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TEXT ·Syscall6(SB),NOSPLIT,$0-80
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BL runtime·entersyscall(SB)
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MOVD a1+8(FP), R2
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MOVD a2+16(FP), R3
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MOVD a3+24(FP), R4
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MOVD a4+32(FP), R5
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MOVD a5+40(FP), R6
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MOVD a6+48(FP), R7
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MOVD trap+0(FP), R1 // syscall entry
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SYSCALL
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MOVD $0xfffffffffffff001, R8
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CMPUBLT R2, R8, ok6
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MOVD $-1, r1+56(FP)
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MOVD $0, r2+64(FP)
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NEG R2, R2
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MOVD R2, err+72(FP) // errno
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BL runtime·exitsyscall(SB)
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RET
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ok6:
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MOVD R2, r1+56(FP)
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MOVD R3, r2+64(FP)
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MOVD $0, err+72(FP) // errno
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BL runtime·exitsyscall(SB)
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RET
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// func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr)
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TEXT ·RawSyscall(SB),NOSPLIT,$0-56
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MOVD a1+8(FP), R2
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MOVD a2+16(FP), R3
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MOVD a3+24(FP), R4
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MOVD $0, R5
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MOVD $0, R6
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MOVD $0, R7
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MOVD trap+0(FP), R1 // syscall entry
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SYSCALL
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MOVD $0xfffffffffffff001, R8
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CMPUBLT R2, R8, ok1
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MOVD $-1, r1+32(FP)
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MOVD $0, r2+40(FP)
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NEG R2, R2
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MOVD R2, err+48(FP) // errno
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RET
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ok1:
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MOVD R2, r1+32(FP)
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MOVD R3, r2+40(FP)
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MOVD $0, err+48(FP) // errno
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RET
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// func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
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TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
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MOVD a1+8(FP), R2
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MOVD a2+16(FP), R3
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MOVD a3+24(FP), R4
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MOVD a4+32(FP), R5
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MOVD a5+40(FP), R6
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MOVD a6+48(FP), R7
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MOVD trap+0(FP), R1 // syscall entry
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SYSCALL
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MOVD $0xfffffffffffff001, R8
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CMPUBLT R2, R8, ok2
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MOVD $-1, r1+56(FP)
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MOVD $0, r2+64(FP)
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NEG R2, R2
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MOVD R2, err+72(FP) // errno
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RET
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ok2:
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MOVD R2, r1+56(FP)
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MOVD R3, r2+64(FP)
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MOVD $0, err+72(FP) // errno
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RET
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#define SYS_SOCKETCALL 102 /* from zsysnum_linux_s390x.go */
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// func socketcall(call int, a0, a1, a2, a3, a4, a5 uintptr) (n int, err int)
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// Kernel interface gets call sub-number and pointer to a0.
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TEXT ·socketcall(SB),NOSPLIT,$0-72
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BL runtime·entersyscall(SB)
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MOVD $SYS_SOCKETCALL, R1 // syscall entry
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MOVD call+0(FP), R2 // socket call number
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MOVD $a0+8(FP), R3 // pointer to call arguments
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MOVD $0, R4
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MOVD $0, R5
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MOVD $0, R6
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MOVD $0, R7
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SYSCALL
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MOVD $0xfffffffffffff001, R8
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CMPUBLT R2, R8, oksock
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MOVD $-1, n+56(FP)
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NEG R2, R2
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MOVD R2, err+64(FP)
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BL runtime·exitsyscall(SB)
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RET
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oksock:
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MOVD R2, n+56(FP)
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MOVD $0, err+64(FP)
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CALL runtime·exitsyscall(SB)
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RET
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// func rawsocketcall(call int, a0, a1, a2, a3, a4, a5 uintptr) (n int, err int)
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// Kernel interface gets call sub-number and pointer to a0.
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TEXT ·rawsocketcall(SB),NOSPLIT,$0-72
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MOVD $SYS_SOCKETCALL, R1 // syscall entry
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MOVD call+0(FP), R2 // socket call number
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MOVD $a0+8(FP), R3 // pointer to call arguments
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MOVD $0, R4
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MOVD $0, R5
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MOVD $0, R6
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MOVD $0, R7
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SYSCALL
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MOVD $0xfffffffffffff001, R8
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CMPUBLT R2, R8, oksock1
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MOVD $-1, n+56(FP)
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NEG R2, R2
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MOVD R2, err+64(FP)
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RET
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oksock1:
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MOVD R2, n+56(FP)
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MOVD $0, err+64(FP)
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RET
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