Hello!
OK, thank you. Actually I just do some exercises for learning Go assembly.
On Tuesday, September 10, 2019 at 12:31:08 PM UTC+8, Ian Lance Taylor wrote:
>
> On Mon, Sep 9, 2019 at 7:57 PM Zhang Chao <zcha...@gmail.com <javascript:>>
> 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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>
>
>
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