Illegal Instruction installing Go on older x86 embedded system

[Thorsten von Eicken]

I'm failing to install Go 1.1.2 from source on an older Cyrix x86 embedded system and am hoping someone can point me in the right direction. The system runs Ubuntu 10.04. The installation fails in

# Building packages and commands for linux/386.

with:

# os/user

SIGILL: illegal instruction

PC=0x80f7b85

go/printer.(*printer).exprList(0x183f9280, 0x10be, 0x1833d880, 0x5, 0x8, ...)

        /usr/local/go/src/pkg/go/printer/nodes.go:206 +0xc75

go/printer.(*printer).expr1(0x183f9280, 0x18351c60, 0x18376f60, 0x0, 0x2, ...)

        /usr/local/go/src/pkg/go/printer/nodes.go:810 +0x15d9

Where would I start looking?

Would trying gccgo make any sense or am I going to hit the same problem anyway?

Thanks!

# cat /proc/cpuinfo

processor       : 0

vendor_id       : CentaurHauls

cpu family      : 6

model           : 7

model name      : VIA Samuel 2

stepping        : 3

cpu MHz         : 399.000

cache size      : 64 KB

fdiv_bug        : no

hlt_bug         : no

f00f_bug        : no

coma_bug        : no

fpu             : yes

fpu_exception   : yes

cpuid level     : 1

wp              : yes

flags           : fpu de tsc msr cx8 mtrr pge mmx 3dnow up

bogomips        : 800.56

clflush size    : 32

cache_alignment : 32

address sizes   : 32 bits physical, 32 bits virtual

power management:

Full stack trace:

# os/user

SIGILL: illegal instruction

PC=0x80f7b85

go/printer.(*printer).exprList(0x183f9280, 0x10be, 0x1833d880, 0x5, 0x8, ...)

        /usr/local/go/src/pkg/go/printer/nodes.go:206 +0xc75

go/printer.(*printer).expr1(0x183f9280, 0x18351c60, 0x18376f60, 0x0, 0x2, ...)

        /usr/local/go/src/pkg/go/printer/nodes.go:810 +0x15d9

go/printer.(*printer).expr(0x183f9280, 0x18351c60, 0x18376f60)

        /usr/local/go/src/pkg/go/printer/nodes.go:883 +0x49

go/printer.(*printer).printNode(0x183f9280, 0x8186200, 0x18376f60, 0x183f8380, 0x183f7600, ...)

        /usr/local/go/src/pkg/go/printer/printer.go:1002 +0x321

go/printer.(*Config).fprint(0xb72cd4f8, 0x18379bc0, 0x183f7600, 0x183550c0, 0x8186200, ...)

        /usr/local/go/src/pkg/go/printer/printer.go:1165 +0x7d

go/printer.(*printer).nodeSize(0x18372b40, 0x183f8820, 0x18376f60, 0xf4240, 0xf4241, ...)

        /usr/local/go/src/pkg/go/printer/nodes.go:1420 +0x11c

go/printer.(*printer).exprList(0x18372b40, 0x10b0, 0x18377530, 0x1, 0x1, ...)

        /usr/local/go/src/pkg/go/printer/nodes.go:183 +0x46c

go/printer.(*printer).stmt(0x18372b40, 0x18371040, 0x18376f80, 0x183f0000)

        /usr/local/go/src/pkg/go/printer/nodes.go:1090 +0x22b1

go/printer.(*printer).stmtList(0x18372b40, 0x1833d8c0, 0x5, 0x8, 0x1, ...)

        /usr/local/go/src/pkg/go/printer/nodes.go:908 +0x1b1

go/printer.(*printer).block(0x18372b40, 0x183791c0, 0x1)

        /usr/local/go/src/pkg/go/printer/nodes.go:921 +0xb2

go/printer.(*printer).stmt(0x18372b40, 0x18371060, 0x18379500, 0x183f0000)

        /usr/local/go/src/pkg/go/printer/nodes.go:1131 +0x2955

go/printer.(*printer).stmtList(0x18372b40, 0x1836f300, 0xb, 0x10, 0x1, ...)

        /usr/local/go/src/pkg/go/printer/nodes.go:908 +0x1b1

go/printer.(*printer).block(0x18372b40, 0x18379820, 0x1)

        /usr/local/go/src/pkg/go/printer/nodes.go:921 +0xb2

go/printer.(*printer).adjBlock(0x18372b40, 0x4b, 0xb, 0x18379820)

        /usr/local/go/src/pkg/go/printer/nodes.go:1490 +0x4a3

go/printer.(*printer).funcDecl(0x18372b40, 0x18379840)

        /usr/local/go/src/pkg/go/printer/nodes.go:1514 +0x1fe

go/printer.(*printer).decl(0x18372b40, 0x18351b20, 0x18379840)

        /usr/local/go/src/pkg/go/printer/nodes.go:1524 +0x87

go/printer.(*printer).declList(0x18372b40, 0x1833d800, 0x5, 0x8)

        /usr/local/go/src/pkg/go/printer/nodes.go:1565 +0x132

go/printer.(*printer).file(0x18372b40, 0x1833dac0)

        /usr/local/go/src/pkg/go/printer/nodes.go:1573 +0x116

go/printer.(*printer).printNode(0x18372b40, 0x8181200, 0x1833dac0, 0x183f8380, 0x8154da0, ...)

        /usr/local/go/src/pkg/go/printer/printer.go:1026 +0x601

go/printer.(*Config).fprint(0x8270190, 0x18379da0, 0x183f17c8, 0x183550c0, 0x8181200, ...)

        /usr/local/go/src/pkg/go/printer/printer.go:1165 +0x7d

go/printer.(*Config).Fprint(0x8270190, 0x18379da0, 0x183f17c8, 0x183550c0, 0x8181200, ...)

        /usr/local/go/src/pkg/go/printer/printer.go:1223 +0x75

main.(*Package).writeOutput(0x183412a0, 0x1833d100, 0xbfb43941, 0xe)

        /usr/local/go/src/cmd/cgo/out.go:449 +0x3da

main.main()

        /usr/local/go/src/cmd/cgo/main.go:278 +0xf51

eax     0x1

ebx     0x1

ecx     0xb72dc5ec

edx     0x4

edi     0xb72dc514

esi     0x8186d80

ebp     0x4a

esp     0xb72dc504

eip     0x80f7b85

eflags  0x10202

cs      0x73

fs      0x0

gs      0x57

[andrey mirtchovski]

see if building with GO386=387 helps:

https://groups.google.com/d/msg/golang-nuts/Pb3yVUpXIKQ/-iqM6vqqJ6AJ

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[minux]

On Sun, Sep 8, 2013 at 11:05 AM, Thorsten von Eicken <t...@rightscale.com> wrote:

I'm failing to install Go 1.1.2 from source on an older Cyrix x86 embedded system and am hoping someone can point me in the right direction. The system runs Ubuntu 10.04. The installation fails in

# Building packages and commands for linux/386.

with:

# os/user

SIGILL: illegal instruction

PC=0x80f7b85

go/printer.(*printer).exprList(0x183f9280, 0x10be, 0x1833d880, 0x5, 0x8, ...)

        /usr/local/go/src/pkg/go/printer/nodes.go:206 +0xc75

go/printer.(*printer).expr1(0x183f9280, 0x18351c60, 0x18376f60, 0x0, 0x2, ...)

        /usr/local/go/src/pkg/go/printer/nodes.go:810 +0x15d9

this is strange, the GO386 setting should be automatically detected when doing native compilation.

what's the output of $GOROOT/pkg/tool/linux_386/dist env ?

[Thorsten von Eicken]

On Sunday, September 8, 2013 8:17:33 AM UTC-7, minux wrote:

this is strange, the GO386 setting should be automatically detected when doing native compilation.

what's the output of $GOROOT/pkg/tool/linux_386/dist env ?

 

# ./pkg/tool/linux_386/dist env

GOROOT="/usr/local/go"

GOBIN="/usr/local/go/bin"

GOARCH="386"

GOOS="linux"

GOHOSTARCH="386"

GOHOSTOS="linux"

GOTOOLDIR="/usr/local/go/pkg/tool/linux_386"

GOCHAR="8"

GO386="387"

[Thorsten von Eicken]

On Sunday, September 8, 2013 8:11:33 AM UTC-7, andrey mirtchovski wrote:

see if building with GO386=387 helps:

# export GO386=387

# ./all.bash

ends in the same failure...

[Rémy Oudompheng]

2013/9/8 Thorsten von Eicken <t...@rightscale.com>:

Dissassemble the binary ($GOROOT/pkg/tool/linux_386/cgo) and show what
instruction is found at address "PC=0x80f7b85".

Rémy.

[Thorsten von Eicken]

Exception: SIGILL: illegal instruction  PC=0x80f7b85

go/printer.(*printer).exprList(0x183f8280, 0x10be, 0x1833d880, 0x5, 0x8, ...)

        /usr/local/go/src/pkg/go/printer/nodes.go:206 +0xc75

Dump of assembler code for function go/printer.(*printer).exprList:

   0x080f6f10 <+0>:     mov    %gs:0x0,%ecx

   0x080f6f17 <+7>:     mov    -0x8(%ecx),%ecx

[...]

   0x080f7b6f <+3167>:  fdivrp %st,%st(1)

   0x080f7b71 <+3169>:  fstpl  0x170(%esp)

   0x080f7b78 <+3176>:  fldl   0x170(%esp)

   0x080f7b7f <+3183>:  fldl   0x81d17d8

-->0x080f7b85 <+3189>:  fucomip %st(1),%st

   0x080f7b87 <+3191>:  fstp   %st(0)

   0x080f7b89 <+3193>:  jae    0x80f7ba8 <go/printer.(*printer).exprList+3224>

   0x080f7b8b <+3195>:  fldl   0x81d17e8

   0x080f7b91 <+3201>:  fldl   0x170(%esp)

   0x080f7b98 <+3208>:  fucomip %st(1),%st

[Ian Lance Taylor]

On Sun, Sep 8, 2013 at 1:48 PM, Thorsten von Eicken <t...@rightscale.com> wrote:
> Exception: SIGILL: illegal instruction PC=0x80f7b85
> go/printer.(*printer).exprList(0x183f8280, 0x10be, 0x1833d880, 0x5, 0x8,
> ...)
> /usr/local/go/src/pkg/go/printer/nodes.go:206 +0xc75
>
> Dump of assembler code for function go/printer.(*printer).exprList:
> 0x080f6f10 <+0>: mov %gs:0x0,%ecx
> 0x080f6f17 <+7>: mov -0x8(%ecx),%ecx
> [...]
> 0x080f7b6f <+3167>: fdivrp %st,%st(1)
> 0x080f7b71 <+3169>: fstpl 0x170(%esp)
> 0x080f7b78 <+3176>: fldl 0x170(%esp)
> 0x080f7b7f <+3183>: fldl 0x81d17d8
> -->0x080f7b85 <+3189>: fucomip %st(1),%st

The fucomip instruction was introduced in the Pentium Pro. You are
using an original version VIA C3, whch is only 486 compatible, not
even Pentium compatible (thanks for providing the /proc/cpuinfo
contents). The current 8g compiler assumes that it is always OK to
generate Pentium Pro instructions. There isn't going to be any simple
workaround here.

Ian

[Thorsten von Eicken]

Drats! But thank you for the help. Do I assume correctly that gccgo should work?

[Ian Lance Taylor]

On Sun, Sep 8, 2013 at 2:52 PM, Thorsten von Eicken <t...@rightscale.com> wrote:
> Drats! But thank you for the help. Do I assume correctly that gccgo should
> work?

Yes, gccgo should work.

Ian