Adding upstream version 1.18.10.upstream/1.18.10upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 34 insertions, 0 deletions

diff --git a/src/runtime/cgo/asm_amd64.s b/src/runtime/cgo/asm_amd64.s
new file mode 100644
index 0000000..386299c
--- /dev/null
+++ b/src/runtime/cgo/asm_amd64.s
@@ -0,0 +1,34 @@
+// Copyright 2009 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"
+#include "abi_amd64.h"
+
+// Called by C code generated by cmd/cgo.
+// func crosscall2(fn, a unsafe.Pointer, n int32, ctxt uintptr)
+// Saves C callee-saved registers and calls cgocallback with three arguments.
+// fn is the PC of a func(a unsafe.Pointer) function.
+// This signature is known to SWIG, so we can't change it.
+TEXT crosscall2(SB),NOSPLIT,$0-0
+	PUSH_REGS_HOST_TO_ABI0()
+
+	// Make room for arguments to cgocallback.
+	ADJSP	$0x18
+#ifndef GOOS_windows
+	MOVQ	DI, 0x0(SP)	/* fn */
+	MOVQ	SI, 0x8(SP)	/* arg */
+	// Skip n in DX.
+	MOVQ	CX, 0x10(SP)	/* ctxt */
+#else
+	MOVQ	CX, 0x0(SP)	/* fn */
+	MOVQ	DX, 0x8(SP)	/* arg */
+	// Skip n in R8.
+	MOVQ	R9, 0x10(SP)	/* ctxt */
+#endif
+
+	CALL	runtime·cgocallback(SB)
+
+	ADJSP	$-0x18
+	POP_REGS_HOST_TO_ABI0()
+	RET