Date: Mon, 13 Nov 2017 10:54:31 -0600 From: Karl Denninger <karl@denninger.net> To: freebsd-arm@freebsd.org Subject: Re: Very bizarre behavior ARM64 (Pi3) Message-ID: <761aadac-86df-da47-c9d9-ab249748a077@denninger.net> In-Reply-To: <8127c8f1-5250-aacf-c374-a852cfaf9f96@gmail.com> References: <7caae80e-876f-631c-23a9-957db7d7ddd5@denninger.net> <1aa5d05e-d5cb-4e46-4d94-e9e51339ca0c@denninger.net> <d2ce002d-7d42-330a-c000-97e6b901a666@gmail.com> <9e053fe6-90af-a96b-970a-cdb07f802cca@denninger.net> <8127c8f1-5250-aacf-c374-a852cfaf9f96@gmail.com>
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This is a cryptographically signed message in MIME format. --------------ms060305060906040202040503 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 11/13/2017 10:50, Michal Meloun wrote: > > On 13.11.2017 17:32, Karl Denninger wrote: >> On 11/13/2017 10:26, Michal Meloun wrote: >>> On 13.11.2017 16:54, Karl Denninger wrote: >>>> On 11/12/2017 12:02, Karl Denninger wrote: >>>>> I managed to get around the Crochet blow-up I reported the other da= y >>>>> with another svn update, and now can Crochet myself a running image= for >>>>> the Pi3 which boots and (at least at first blush) works. >>>>> >>>>> But I have code that has been running on the Pi3 (and also on the P= i2, >>>>> along with other architectures) for quite some time that no longer = runs >>>>> when compiled on that newly-built OS. It compiles without warnings= or >>>>> errors but blows up immediately when executed. >>>>> >>>>> I just tried to roll that build forward to the newly-built (FreeBSD= >>>>> 12.0-CURRENT #0 r325681M: Fri Nov 10 19:31:28 CST 2017) -HEAD and = am >>>>> getting really bizarre core dumps, including (if compiled using Ope= nSSL >>>>> libraries) a crash on initialization claiming unknown opcodes in th= e >>>>> compiled binary. >>>>> >>>>> root@rpi3:/data/HD-MCP # lldb hd-mcp >>>>> (lldb) target create "hd-mcp" >>>>> Current executable set to 'hd-mcp' (aarch64). >>>>> (lldb) run -n >>>>> Process 1101 launching >>>>> Process 1101 launched: '/data/HD-MCP/hd-mcp' (aarch64) >>>>> Process 1101 stopped >>>>> * thread #1, name =3D 'hd-mcp', stop reason =3D signal SIGILL: ille= gal trap >>>>> frame #0: 0x00000000403342e8 >>>>> -> 0x403342e8: .long 0x0ee0e000 ; unknown opcode >>>>> 0x403342ec: ret >>>>> 0x403342f0: stp x28, x19, [sp, #-0x20]! >>>>> 0x403342f4: stp x29, x30, [sp, #0x10] >>>>> (lldb) bt >>>>> * thread #1, name =3D 'hd-mcp', stop reason =3D signal SIGILL: ille= gal trap >>>>> * frame #0: 0x00000000403342e8 >>>>> frame #1: 0x0000000040082ad8 >>>>> frame #2: 0x0000000040081ab4 >>>>> (lldb) >>>>> >>> That is pretty standard behavior. >>> 0x0ee0e000 opcode is optional pmull crypto extension instruction and >>> OpenSSL tests the availability of these optional instructions in this= way. >>> It have SIGILL handler installed and if a signal is hit, it means tha= t >>> these extensions are not available. >>> Simply hit 'c' and ignore it... >>> Michal >>> >> Aha.=C2=A0 Got it. >> >> However, this remains a problem and is linked, I suspect, to the above= >> bug report: >> >> root@rpi3:/data/HD-MCP # lldb hd-mcp.freeware >> (lldb) target create "hd-mcp.freeware" >> Current executable set to 'hd-mcp.freeware' (aarch64). >> (lldb) b 12752 >> Breakpoint 1: where =3D hd-mcp.freeware`main + 192 at hd-mcp.c:12752, >> address =3D 0x0000000000040974 >> >> (12751 is the first "real" assignment in main(); so stop right after t= he >> buffer is initialized) >> >> (lldb) l 12751 >> =C2=A0=C2=A0 12751=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 x10_fail_event[0] =3D 0; >> =C2=A0=C2=A0 12752=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 status_buffer[0] =3D 0; >> =C2=A0=C2=A0 12753=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 status_mod =3D 0; >> =C2=A0=C2=A0 12754 >> =C2=A0=C2=A0 12755=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 emit_html5_script[0] =3D 0; >> =C2=A0=C2=A0 12756 >> =C2=A0=C2=A0 12757=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 int=C2=A0=C2=A0=C2=A0=C2=A0 dynamic_= time; >> =C2=A0=C2=A0 12758 >> =C2=A0=C2=A0 12759=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 #ifdef=C2= =A0 OPENSSL >> =C2=A0=C2=A0 12760=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 SSL=C2=A0=C2=A0=C2=A0=C2=A0 *ssl_soc= ket; >> (lldb) r -n >> Process 1277 launching >> Process 1277 launched: '/data/HD-MCP/hd-mcp.freeware' (aarch64) >> Process 1277 stopped >> * thread #1, name =3D 'hd-mcp.freeware', stop reason =3D breakpoint 1.= 1 >> =C2=A0=C2=A0=C2=A0 frame #0: 0x0000000000040974 hd-mcp.freeware`main(a= rgc=3D2, >> argv=3D0x0000ffffffffebc8) at hd-mcp.c:12752 >> =C2=A0=C2=A0 12749 >> =C2=A0=C2=A0 12750 >> =C2=A0=C2=A0 12751=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 x10_fail_event[0] =3D 0; >> -> 12752=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 status_buffer[0] =3D 0; >> =C2=A0=C2=A0 12753=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 status_mod =3D 0; >> =C2=A0=C2=A0 12754 >> =C2=A0=C2=A0 12755=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 emit_html5_script[0] =3D 0; >> (lldb) p x10_fail_event >> Segmentation fault (core dumped) >> root@rpi3:/data/HD-MCP # > Well, lldb is not a much stable. Can you try gdb (8.0.1, from ports)? > Michal > I didn't think gdb worked on arm64 (at all)... has that recently been corrected? If it has been I can certainly give it a shot but it may take a while since there's no package set available, I don't believe, for arm64 and self-hosting on a machine that runs off SD card is "somewhat" problematic..... :-) gdb is in the 11-STABLE "stock" crossbuild for the RPI2 but is missing from the -HEAD build for the RPI3 thus more-or-less "forcing" use of lldb, or at least that was my understanding. --=20 Karl Denninger karl@denninger.net <mailto:karl@denninger.net> /The Market Ticker/ /[S/MIME encrypted email preferred]/ --------------ms060305060906040202040503 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgMFADCABgkqhkiG9w0BBwEAAKCC DdgwggagMIIEiKADAgECAhMA5EiKghDOXrvfxYxjITXYDdhIMA0GCSqGSIb3DQEBCwUAMIGL MQswCQYDVQQGEwJVUzEQMA4GA1UECAwHRmxvcmlkYTESMBAGA1UEBwwJTmljZXZpbGxlMRkw 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