diff options
Diffstat (limited to 'src/syscall/asm_linux_s390x.s')
| -rw-r--r-- | src/syscall/asm_linux_s390x.s | 191 |
1 files changed, 191 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..86a5c51 --- /dev/null +++ b/src/syscall/asm_linux_s390x.s @@ -0,0 +1,191 @@ +// 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 Syscall(trap int64, a1, a2, a3 int64) (r1, r2, err int64) +TEXT ·Syscall(SB),NOSPLIT,$0-56 + BL runtime·entersyscall(SB) + 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 $0xfffffffffffff001, R8 + CMPUBLT R2, R8, ok + MOVD $-1, r1+32(FP) + MOVD $0, r2+40(FP) + NEG R2, R2 + MOVD R2, err+48(FP) // errno + BL runtime·exitsyscall(SB) + RET +ok: + MOVD R2, r1+32(FP) + MOVD R3, r2+40(FP) + MOVD $0, err+48(FP) // errno + BL runtime·exitsyscall(SB) + RET + +// func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) +TEXT ·Syscall6(SB),NOSPLIT,$0-80 + BL runtime·entersyscall(SB) + MOVD a1+8(FP), R2 + MOVD a2+16(FP), R3 + MOVD a3+24(FP), R4 + MOVD a4+32(FP), R5 + MOVD a5+40(FP), R6 + MOVD a6+48(FP), R7 + MOVD trap+0(FP), R1 // syscall entry + SYSCALL + MOVD $0xfffffffffffff001, R8 + CMPUBLT R2, R8, ok6 + MOVD $-1, r1+56(FP) + MOVD $0, r2+64(FP) + NEG R2, R2 + MOVD R2, err+72(FP) // errno + BL runtime·exitsyscall(SB) + RET +ok6: + MOVD R2, r1+56(FP) + MOVD R3, r2+64(FP) + MOVD $0, err+72(FP) // errno + BL runtime·exitsyscall(SB) + RET + +// func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr) +TEXT ·RawSyscall(SB),NOSPLIT,$0-56 + 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 $0xfffffffffffff001, R8 + CMPUBLT R2, R8, ok1 + MOVD $-1, r1+32(FP) + MOVD $0, r2+40(FP) + NEG R2, R2 + MOVD R2, err+48(FP) // errno + RET +ok1: + MOVD R2, r1+32(FP) + MOVD R3, r2+40(FP) + MOVD $0, err+48(FP) // errno + RET + +// func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) +TEXT ·RawSyscall6(SB),NOSPLIT,$0-80 + MOVD a1+8(FP), R2 + MOVD a2+16(FP), R3 + MOVD a3+24(FP), R4 + MOVD a4+32(FP), R5 + MOVD a5+40(FP), R6 + MOVD a6+48(FP), R7 + MOVD trap+0(FP), R1 // syscall entry + SYSCALL + MOVD $0xfffffffffffff001, R8 + CMPUBLT R2, R8, ok2 + MOVD $-1, r1+56(FP) + MOVD $0, r2+64(FP) + NEG R2, R2 + MOVD R2, err+72(FP) // errno + RET +ok2: + MOVD R2, r1+56(FP) + MOVD R3, r2+64(FP) + MOVD $0, err+72(FP) // errno + RET + +// func rawVforkSyscall(trap, a1 uintptr) (r1, err uintptr) +TEXT ·rawVforkSyscall(SB),NOSPLIT|NOFRAME,$0-32 + MOVD $0, R2 + MOVD a1+8(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+16(FP) + NEG R2, R2 + MOVD R2, err+24(FP) // errno + RET +ok2: + MOVD R2, r1+16(FP) + MOVD $0, err+24(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 |