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-rw-r--r--src/runtime/internal/syscall/asm_linux_s390x.s28
1 files changed, 28 insertions, 0 deletions
diff --git a/src/runtime/internal/syscall/asm_linux_s390x.s b/src/runtime/internal/syscall/asm_linux_s390x.s
new file mode 100644
index 0000000..1b27f29
--- /dev/null
+++ b/src/runtime/internal/syscall/asm_linux_s390x.s
@@ -0,0 +1,28 @@
+// Copyright 2022 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"
+
+// func Syscall6(num, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, errno uintptr)
+TEXT ·Syscall6(SB),NOSPLIT,$0-80
+ MOVD num+0(FP), R1 // syscall entry
+ 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
+ SYSCALL
+ MOVD $0xfffffffffffff001, R8
+ CMPUBLT R2, R8, ok
+ MOVD $-1, r1+56(FP)
+ MOVD $0, r2+64(FP)
+ NEG R2, R2
+ MOVD R2, errno+72(FP)
+ RET
+ok:
+ MOVD R2, r1+56(FP)
+ MOVD R3, r2+64(FP)
+ MOVD $0, errno+72(FP)
+ RET