runtime: "SIGILL: illegal instruction" at arm64 v8.0 and use go routing

[friddle]

Go version

go1.23.4

Output of go env in your module/workspace:

GO111MODULE=''
GOARCH='arm64'
GOBIN=''
GOCACHE='/root/.cache/go-build'
GOENV='/root/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFLAGS=''
GOHOSTARCH='arm64'
GOHOSTOS='linux'
GOINSECURE=''
GOMODCACHE='/root/gopath/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/root/gopath/'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/root/go/'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/root/go/pkg/tool/linux_arm64'
GOVCS=''
GOVERSION='go1.23.4'
GODEBUG=''
GOTELEMETRY='local'
GOTELEMETRYDIR='/root/.config/go/telemetry'
GCCGO='gccgo'
GOARM64='v8.0'
AR='ar'
CC='gcc'
CXX='g++'
CGO_ENABLED='1'
GOMOD='/root/ops-ctl/ops-ctl-core/go.mod'
GOWORK=''
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
PKG_CONFIG='pkg-config'
GOGCCFLAGS='-fPIC -pthread -Wl,--no-gc-sections -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build1050445395=/tmp/go-build -gno-record-gcc-switches'

other:
Architecture:                    aarch64
CPU op-mode(s):                  64-bit
Byte Order:                      Little Endian
CPU(s):                          12
On-line CPU(s) list:             0-11
Thread(s) per core:              1
Core(s) per socket:              1
Socket(s):                       12
NUMA node(s):                    1
Vendor ID:                       Phytium
Model:                           2
Model name:                      FT-2000+/64
Stepping:                        0x1
CPU max MHz:                     2400.0000
CPU min MHz:                     2400.0000
BogoMIPS:                        100.00
L1d cache:                       768 KiB
L1i cache:                       768 KiB
L2 cache:                        6 MiB
L3 cache:                        384 MiB
NUMA node0 CPU(s):               0-11
Vulnerability Itlb multihit:     Not affected
Vulnerability L1tf:              Not affected

What did you do?

CGO_ENABLED=0 go build -ldflags "-X main.Version=${git_tag}_${date_sum} -X main.Sum=${git_commit}" -o ../dist/ops-ctl-core ./main.go
./ops-ctl-core

What did you see happen?

[root@localhost dist]# ./ops-ctl-core 
SIGILL: illegal instruction
PC=0xfffb428e01f4 m=0 sigcode=1
instruction bytes: 0xa 0xfd 0xeb 0x88 0xe8 0x3 0xb 0x2a 0xea 0x3 0x1f 0x32 0x1f 0x1 0xa 0x6b

goroutine 1 gp=0x40000021c0 m=0 mp=0x25a6d80 [running, locked to thread]:
runtime: g 1 gp=0x40000021c0: unknown pc 0xfffb428e01f4
stack: frame={sp:0x4000cf67a0, fp:0x0} stack=[0x4001192000,0x40011a2000)

runtime: g 1 gp=0x40000021c0: unknown pc 0xfffb428e01f4
stack: frame={sp:0x4000cf67a0, fp:0x0} stack=[0x4001192000,0x40011a2000)


goroutine 2 gp=0x4000002700 m=nil [force gc (idle)]:
runtime.gopark(0x0?, 0x0?, 0x0?, 0x0?, 0x0?)
        /root/go/src/runtime/proc.go:424 +0xc8 fp=0x4000076f90 sp=0x4000076f70 pc=0x834b8
runtime.goparkunlock(...)
        /root/go/src/runtime/proc.go:430
runtime.forcegchelper()
        /root/go/src/runtime/proc.go:337 +0xb8 fp=0x4000076fd0 sp=0x4000076f90 pc=0x4d9e8
runtime.goexit({})
        /root/go/src/runtime/asm_arm64.s:1223 +0x4 fp=0x4000076fd0 sp=0x4000076fd0 pc=0x8b7a4
created by runtime.init.7 in goroutine 1
        /root/go/src/runtime/proc.go:325 +0x24

What did you expect to see?

no error

[gabyhelp]

Related Issues

• runtime: runtime.Breakpoint() generates illegal instruction on windows/arm64 #53837 (closed)
• runtime: SIGILL in runtime.asmcgocall #18748 (closed)
• cmd/compile: SIGILL when building golang.org/x/sys/unix on openbsd/arm64 #42517 (closed)
• cmd/compile: illegal instruction on mips64le #43045 (closed)
• cmd/compile: go1.8 failed to install from source on mips64le #19140 (closed)
• runtime/cgo: arm5 sigill #19674 (closed)
• run failed: illegal instruction (core dumped) on Centos7 ARM64 #45823 (closed)
• linux/mips 1.14: illegal instruction #37876 (closed)
• runtime: SIGILL: illegal instruction from runtime.deductSweepCredit #29862 (closed)
• runtime: crash when trying go run or go build #37638 (closed)

_{(Emoji vote if this was helpful or unhelpful; more detailed feedback welcome in this discussion.)}

[Jorropo]

cc @golang/compiler @golang/arm

[prattmic]

Your instructions bytes are:

0xa 0xfd 0xeb 0x88

To little endian and binary:

0b10001000 11101011 11111101 00001010

Following the encoding at:

• Top
• Loads and stores

This says this encoding is "unallocated", which would explain the immediate cause of SIGILL (though I may have messed something up here).

PC=0xfffb428e01f4 seems very suspicious here. This doesn't look like a normal userspace address, more like a kernel address, and it is clearly way too far away from the normal PCs in the program like pc=0x834b8.

Can you reproduce this under a debugger to see exactly what is faulting? Perhaps capture /proc/PID/maps as well to see what this PC's mapping is.

[friddle]

thanks
find problem is caused by https://github.com/google/re2 in Phytium arm cpu. in ARM official cpu is ok.

[friddle]

i