On Wed, Dec 25, 2024 at 10:34 PM zhengyao xie <jayant...@gmail.com> wrote:
>
> I would like to ask everyone for your help. In external code, I used 
> `//go:linkname` directive as follows:
>
> ```go
> //go:linkname runtime_setEventErr runtime.(*pollDesc).setEventErr
> func runtime_setEventErr(pd runtimePollDesc, b bool, seq uintptr)
> ```
> The `runtime.(*pollDesc).setEventErr` function has been linked using 
> linkname. It works well before go1.23, but since [go1.23 lock down future 
> uses of linkname](https://github.com/golang/go/issues/67401), it can't work. 
> I want to export this function within a private go runtime to remove the 
> linkname check. How should I modify it? I have tried several ways but none of 
> them seem to work:
>
> ```go
> //go:linkname setEventErr
> func (pd *pollDesc) setEventErr(b bool, seq uintptr)
>
> //go:linkname (*pollDesc).setEventErr
> func (pd *pollDesc) setEventErr(b bool, seq uintptr)
>
> //go:linkname runtime.(*pollDesc).setEventErr
> func (pd *pollDesc) setEventErr(b bool, seq uintptr)
> ```
>
> ```bash
> cd go/src && ./make.bash
> ```
>
> The error log is:
>
> ```
> /usr/local/go/src/runtime/netpoll.go:178:3: //go:linkname must refer to 
> declared function or variable
> ```


Build with "go build -ldflags=-checklinkname=0".

Ian

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