On Mon, Sep 9, 2019 at 7:57 PM Zhang Chao <zchao1...@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
> On Tuesday, September 10, 2019 at 10:55:00 AM UTC+8, Ian Lance Taylor wrote:
>>
>> On Mon, Sep 9, 2019 at 8:09 AM Zhang Chao <zcha...@gmail.com> wrote:
>> >
>> > 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 :) )?
>>
>> 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
>
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