Go: cmd/compile: illegal Instruction on POWER7 with go 1.13

Created on 16 Dec 2020  路  11Comments  路  Source: golang/go

What version of Go are you using (go version)?

$ go version
1.13

Does this issue reproduce with the latest release?

with 1.15 & 1,14, I ran into another error in earlier steps.
when i executed 'env GOOS=linux GOARCH=ppc64 ./bootstrap.bash', 'unsupported GOARCH ppc64' was shown in logs.

What operating system and processor architecture are you using (go env)?

go env Output


$ go env

uname -a

Linux ppclinux 3.10.0-1160.el7.ppc64 #1 SMP Wed Sep 30 02:20:51 UTC 2020 ppc64 ppc64 ppc64 GNU/Linux

cat /etc/redhat-release

CentOS Linux release 7.9.2009 (AltArch)

lscpu

Architecture:          ppc64

CPU op-mode(s):        32-bit, 64-bit

Byte Order:            Big Endian

CPU(s):                32

On-line CPU(s) list:   0-31

Thread(s) per core:    4

Core(s) per socket:    1

Socket(s):             8

NUMA node(s):          1

Model:                 2.3 (pvr 003f 0203)

Model name:            POWER7 (architected), altivec supported

Hypervisor vendor:     pHyp

Virtualization type:   para

L1d cache:             32K

L1i cache:             32K

NUMA node0 CPU(s):     0-31

What did you do?

Build Go 1.4 on linux/amd64:
git clone https://go.googlesource.com/go $HOME/go1.4
cd $HOME/go1.4/src
git checkout release-branch.go1.4
./make.bash

Build Go 1.13 on linux/amd64:
git clone https://go.googlesource.com/go $HOME/go
cd $HOME/go/src
git checkout release-branch.go1.15
env GOROOT_BOOTSTRAP=$HOME/go1.4 ./make.bash

Build a bootstrap distribution for linux/ppc64 on linux/amd64
cd $HOME/go/src
env GOOS=linux GOARCH=ppc64 ./bootstrap.bash
scp .tbz file to linux/ppc64 $HOME

Build Go 1.13 on linux/ppc64:
tar -xvjf go-linux-ppc64-bootstrap.tbz
git clone https://go.googlesource.com/go $HOME/go
cd $HOME/go/src
git checkout release-branch.go1.13
env GOROOT_BOOTSTRAP=$HOME/go-linux-ppc64-bootstrap ./all.bash

What did you expect to see?

ALL TESTS PASSED

Installed Go for linux/ppc64 in $HOME/go.
Installed commands in $HOME/go/bin.
* You need to add $HOME/go/bin to your $PATH. *

What did you see instead?

Building Go bootstrap tool.

cmd/dist
./make.bash: line 121: 24013 Illegal instruction GOROOT="$GOROOT_BOOTSTRAP" GOOS="" GOARCH="" "$GOROOT_BOOTSTRAP/bin/go" build -o cmd/dist/dist ./cmd/dist

picture moria7757

All 11 comments

From https://github.com/golang/go/wiki/MinimumRequirements#ppc64-big-endian

ppc64 (big endian)
POWER5 and above. Starting with Go 1.9, only POWER8 and above are supported.

ppc64le (little endian)
POWER8 and above.

So go 1.13 doesn't support POWER7.

randall77 picture randall77 on 16 Dec 2020
👍1

From https://github.com/golang/go/wiki/MinimumRequirements#ppc64-big-endian

ppc64 (big endian)
POWER5 and above. Starting with Go 1.9, only POWER8 and above are supported.

ppc64le (little endian)
POWER8 and above.

So go 1.13 doesn't support POWER7.

It means that i should build go 1.8?

moria7757 picture moria7757 on 16 Dec 2020

Yes, if you want to build for POWER7 big endian then 1.8 should work.
(You'll need it for building the bootstrap as well as building natively.)

randall77 picture randall77 on 16 Dec 2020
👍1

Yes, if you want to build for POWER7 big endian then 1.8 should work.
(You'll need it for building the bootstrap as well as building natively.)

thank you, now it's working, but i ran into new error:
when run '+ go build -buildmode=pie -ldflags=-linkmode=external -o /usr/local/bin/docker-proxy github.com/docker/libnetwork/cmd/proxy' this error appear : '-buildmode=pie not supported on linux/ppc64'

moria7757 picture moria7757 on 17 Dec 2020

That error is pretty self-explanatory. That mode isn't supported on that platform.
That's still the case at tip.

randall77 picture randall77 on 17 Dec 2020
👍1

That error is pretty self-explanatory. That mode isn't supported on that platform.
That's still the case at tip.

you mean it's not supported in any version of go?
what should i do now?
is it helpful to create new issue?
i really need to install docker on ppc64

moria7757 picture moria7757 on 17 Dec 2020

you mean it's not supported in any version of go?

Correct.

what should i do now?

Does docker need PIE? Try building it without PIE.
You could also try using gccgo.

is it helpful to create new issue?

If you're requesting that we add PIE support to tip, yes. See #27144 for an example.
We won't be adding anything to 1.8, so PIE POWER7 support isn't possible.

i really need to install docker on ppc64

Someone has successfully built docker, see https://developer.ibm.com/devpractices/devops/tutorials/d-docker-on-power-linux-platform/

randall77 picture randall77 on 17 Dec 2020
👍1

you mean it's not supported in any version of go?

Correct.
yes

what should i do now?

Does docker need PIE? Try building it without PIE.
You could also try using gccgo.

is it helpful to create new issue?

If you're requesting that we add PIE support to tip, yes. See #27144 for an example.
We won't be adding anything to 1.8, so PIE POWER7 support isn't possible.

i really need to install docker on ppc64

Someone has successfully built docker, see https://developer.ibm.com/devpractices/devops/tutorials/d-docker-on-power-linux-platform/

i am using docker srpm: docker-ce-19.03.9-3.el7.src.rpm
when i am trying to rebuild package for ppc64, (executing rpmbuild -bb /root/rpmbuild/SPECS/docker-ce.spec), some where in one of spec file, it execute 'go build -buildmode=pie -ldflags=-linkmode=external -o /usr/local/bin/docker-proxy github.com/docker/libnetwork/cmd/proxy', i can edit that command and remove buildmode, but i think it maybe disrupt process of rebuilding.
i have seen that ibm link, but it uses non-official package and installation is not on centos.

do you think someone can help me about this?
is it completely impossible to add PIE POWER7 support to go 1.8? or maybe is it possible to add power7 and pie support to go 1.15?

moria7757 picture moria7757 on 17 Dec 2020

do you think someone can help me about this?

The issue tracker isn't the right place for getting help. You might look into these forums:

is it completely impossible to add PIE POWER7 support to go 1.8?

It may be possible to do yourself, but the Go project will not be doing that. 1.8 is unsupported and will not be receiving updates of any kind.

or maybe is it possible to add power7 and pie support to go 1.15?

Same answer for power7, we already decided to not support that architecture any more.
We may add pie support to ppc64 at tip at some point, but I don't think that would help you. (And that would be 1.17 at the earliest.)

randall77 picture randall77 on 17 Dec 2020
👍1

do you think someone can help me about this?

The issue tracker isn't the right place for getting help. You might look into these forums:

is it completely impossible to add PIE POWER7 support to go 1.8?

It may be possible to do yourself, but the Go project will not be doing that. 1.8 is unsupported and will not be receiving updates of any kind.

or maybe is it possible to add power7 and pie support to go 1.15?

Same answer for power7, we already decided to not support that architecture any more.
We may add pie support to ppc64 at tip at some point, but I don't think that would help you. (And that would be 1.17 at the earliest.)

i am very thankful to you
is there any manual or instruction about how to add buildmode to go 1.8?

moria7757 picture moria7757 on 17 Dec 2020

@randall77 do you know how can i convert go command with it's flags to gccgo command?

moria7757 picture moria7757 on 17 Dec 2020
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