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Diffstat (limited to 'src/syscall/asm_linux_s390x.s')
| -rw-r--r-- | src/syscall/asm_linux_s390x.s | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/src/syscall/asm_linux_s390x.s b/src/syscall/asm_linux_s390x.s new file mode 100644 index 0000000..41c34b1 --- /dev/null +++ b/src/syscall/asm_linux_s390x.s @@ -0,0 +1,93 @@ +// Copyright 2016 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. + +#include "textflag.h" + +// +// System calls for s390x, Linux +// + +// func rawVforkSyscall(trap, a1, a2 uintptr) (r1, err uintptr) +TEXT ·rawVforkSyscall(SB),NOSPLIT|NOFRAME,$0-40 + MOVD a1+8(FP), R2 + MOVD a2+16(FP), R3 + MOVD $0, R4 + MOVD $0, R5 + MOVD $0, R6 + MOVD $0, R7 + MOVD trap+0(FP), R1 // syscall entry + SYSCALL + MOVD $0xfffffffffffff001, R8 + CMPUBLT R2, R8, ok2 + MOVD $-1, r1+24(FP) + NEG R2, R2 + MOVD R2, err+32(FP) // errno + RET +ok2: + MOVD R2, r1+24(FP) + MOVD $0, err+32(FP) // errno + RET + +// func rawSyscallNoError(trap, a1, a2, a3 uintptr) (r1, r2 uintptr) +TEXT ·rawSyscallNoError(SB),NOSPLIT,$0-48 + MOVD a1+8(FP), R2 + MOVD a2+16(FP), R3 + MOVD a3+24(FP), R4 + MOVD $0, R5 + MOVD $0, R6 + MOVD $0, R7 + MOVD trap+0(FP), R1 // syscall entry + SYSCALL + MOVD R2, r1+32(FP) + MOVD R3, r2+40(FP) + RET + +#define SYS_SOCKETCALL 102 /* from zsysnum_linux_s390x.go */ + +// func socketcall(call int, a0, a1, a2, a3, a4, a5 uintptr) (n int, err int) +// Kernel interface gets call sub-number and pointer to a0. +TEXT ·socketcall(SB),NOSPLIT,$0-72 + BL runtime·entersyscall(SB) + MOVD $SYS_SOCKETCALL, R1 // syscall entry + MOVD call+0(FP), R2 // socket call number + MOVD $a0+8(FP), R3 // pointer to call arguments + MOVD $0, R4 + MOVD $0, R5 + MOVD $0, R6 + MOVD $0, R7 + SYSCALL + MOVD $0xfffffffffffff001, R8 + CMPUBLT R2, R8, oksock + MOVD $-1, n+56(FP) + NEG R2, R2 + MOVD R2, err+64(FP) + BL runtime·exitsyscall(SB) + RET +oksock: + MOVD R2, n+56(FP) + MOVD $0, err+64(FP) + CALL runtime·exitsyscall(SB) + RET + +// func rawsocketcall(call int, a0, a1, a2, a3, a4, a5 uintptr) (n int, err int) +// Kernel interface gets call sub-number and pointer to a0. +TEXT ·rawsocketcall(SB),NOSPLIT,$0-72 + MOVD $SYS_SOCKETCALL, R1 // syscall entry + MOVD call+0(FP), R2 // socket call number + MOVD $a0+8(FP), R3 // pointer to call arguments + MOVD $0, R4 + MOVD $0, R5 + MOVD $0, R6 + MOVD $0, R7 + SYSCALL + MOVD $0xfffffffffffff001, R8 + CMPUBLT R2, R8, oksock1 + MOVD $-1, n+56(FP) + NEG R2, R2 + MOVD R2, err+64(FP) + RET +oksock1: + MOVD R2, n+56(FP) + MOVD $0, err+64(FP) + RET |