1// Copyright 2022 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5#include "funcdata.h"
6#include "textflag.h"
7
8// Assembly function for runtime_test.TestStartLineAsm.
9//
10// Note that this file can't be built directly as part of runtime_test, as assembly
11// files can't declare an alternative package. Building it into runtime is
12// possible, but linkshared complicates things:
13//
14// 1. linkshared mode leaves the function around in the final output of
15// non-test builds.
16// 2. Due of (1), the linker can't resolve the callerStartLine relocation
17// (as runtime_test isn't built for non-test builds).
18//
19// Thus it is simpler to just put this in its own package, imported only by
20// runtime_test. We use ABIInternal as no ABI wrapper is generated for
21// callerStartLine since it is in a different package.
22
23TEXT ·AsmFunc<ABIInternal>(SB),NOSPLIT,$8-0
24 NO_LOCAL_POINTERS
25 MOVQ $0, AX // wantInlined
26 MOVQ ·CallerStartLine(SB), DX
27 CALL (DX)
28 RET
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