go build reports relocation target not defined for ABI0 (but is defined for ABIInternal)

[Zhang Chao]

Hello!

I'm trying to write a tiny go program with a SayHello function written by assembly.

When I build it, the go build command giving me an error message:

# bar

main.asmSayHello: relocation target runtime.printstring not defined for ABI0 (but is defined for ABIInternal)

Here are the codes.

main.go:

package main

func main() { asmSayHello() }

func asmSayHello()

and main_amd64.s:

#include "textflag.h"

#include "funcdata.h"

// "Hello, World\n"

DATA text<>+0(SB)/8,$"Hello Wo"

DATA text<>+8(SB)/8,$"rld!\n"

GLOBL text<>(SB),NOPTR,$16

// func asmSayHello()

TEXT ·asmSayHello(SB), $16-0

    NO_LOCAL_POINTERS

    MOVQ $text<>+0(SB), AX

    MOVQ AX, (SP)

    MOVQ $16, 8(SP)

    CALL runtime·printstring(SB)

    RET

The go facility version information:

# go version

go version go1.12.5 linux/amd64

Anyone who can help me to solve this weird problem (at least for me :) )?

[Ian Lance Taylor]

You are trying to reach into the runtime package to run an internal
function. That isn't permitted. It's never been permitted, although
it used to work. Now it doesn't work.

For more information see
https://github.com/golang/proposal/blob/master/design/27539-internal-abi.md#compatibility
.

Ian

[Zhang Chao]

Hello!

Thanks for your interpretation. So is there any workaround?

[Ian Lance Taylor]

On Mon, Sep 9, 2019 at 7:57 PM Zhang Chao <zcha...@gmail.com> wrote:
>
> Thanks for your interpretation. So is there any workaround?

Don't try to call an internal runtime package function. Call a Go
function defined in your own package that calls the print builtin.

Ian

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[Zhang Chao]

Hello!

OK, thank you. Actually I just do some exercises for learning Go assembly.

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