| // 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 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 |
