Re: [cfarm-announces] New Arm Morello SoC machine: cfarm240
On Thu, 24 Aug 2023, Torbjörn Granlund wrote: Marc Glisse writes: There is, it is called (u)intptr_t, the standard name for an integer type that can hold a pointer. Right! I only naively checked intmax_t, assuming max would mean max. :-) Hmm, for old ABIs gaining a new integer type, I understand why intmax_t cannot increase. But for a new ABI like here, it is surprising. I guess they consider (u)intptr_t as not a true integer type but just a kind of pointer through which they can track memory. That would explain why they don't like non-pointer arithmetic on that type. The failures I get in the testsuite are "Invalid address alignment." during temporary allocation, which is not too surprising. -- Marc Glisse ___ gmp-bugs mailing list gmp-bugs@gmplib.org https://gmplib.org/mailman/listinfo/gmp-bugs
Re: [cfarm-announces] New Arm Morello SoC machine: cfarm240
Marc Glisse writes: There is, it is called (u)intptr_t, the standard name for an integer type that can hold a pointer. Right! I only naively checked intmax_t, assuming max would mean max. :-) There seem to be a problem with arithmetic on uintptr_t, though. The compiler generates a plain "mul" instruction for multiplying two of these fat integers, which is not quite right. Admittedly, the compiler outputs an arm (no pun intended) long warning message: foo.c:7:12: warning: binary expression on capability types 'uintptr_t' (aka 'unsigned __intcap') and 'uintptr_t'; it is not clear which should be used as the source of provenance; currently provenance is inherited from the left-hand side [-Wcheri-provenance] Not sure what that means, though. But it probably means "I generate garbage code from your sources, sorry about that". -- Torbjörn Please encrypt, key id 0xC8601622 ___ gmp-bugs mailing list gmp-bugs@gmplib.org https://gmplib.org/mailman/listinfo/gmp-bugs
Re: [cfarm-announces] New Arm Morello SoC machine: cfarm240
On Thu, 24 Aug 2023, Torbjörn Granlund wrote: Note the size of pointers, 16 bytes. There is no integer type mathing that, so if code tries to cast a pointer through some integer type for, say, aligning it, things will break. There is, it is called (u)intptr_t, the standard name for an integer type that can hold a pointer. -- Marc Glisse ___ gmp-bugs mailing list gmp-bugs@gmplib.org https://gmplib.org/mailman/listinfo/gmp-bugs
Re: [cfarm-announces] New Arm Morello SoC machine: cfarm240
Marc Glisse writes: Hmm, but with that proposed patch, configure later fails with checking size of void *... 16 checking size of unsigned short... 2 checking size of unsigned... 4 checking size of unsigned long... 8 checking size of mp_limb_t... 8 configure: error: Oops, mp_limb_t is 64 bits, but the assembler code in this configuration expects 32 bits. configure --disable-assembly does allow to build the library, but then quite a few tests fail with "bus error": t-toom6h, t-toom8h, t-toom8-sqr, t-div, t-mulmod_bnm1, ..., t-sizeinbase. So more work is needed on the GMP side :-( Note the size of pointers, 16 bytes. There is no integer type mathing that, so if code tries to cast a pointer through some integer type for, say, aligning it, things will break. Apparently, this is some sort of research platform. I have no idea how hard a GMP port might be, I've given up trying to make GMP run well on Arm since it is too hard and too expensive to find hardware for 90% of the Arm cores. There are lots of "Fruit Pi" boards, but they all use a small set of processor cores (essentially A55, A72, and A73) or cost and arm (no pun intended) and a leg. But GMP at least runs on most Arm cores, as long as they follow the standard ABI. -- Torbjörn Please encrypt, key id 0xC8601622 ___ gmp-bugs mailing list gmp-bugs@gmplib.org https://gmplib.org/mailman/listinfo/gmp-bugs
Re: [cfarm-announces] New Arm Morello SoC machine: cfarm240
On Thu, 24 Aug 2023, Marc Glisse wrote: It seems that uname -p returns aarch64c, configfsf.guess uses that, and configfsf.sub gets confused by that, so it should be reported there. Ah, I already see at least https://lists.gnu.org/archive/html/config-patches/2023-08/msg00043.html so hopefully it will get discussed / solved there. Hmm, but with that proposed patch, configure later fails with checking size of void *... 16 checking size of unsigned short... 2 checking size of unsigned... 4 checking size of unsigned long... 8 checking size of mp_limb_t... 8 configure: error: Oops, mp_limb_t is 64 bits, but the assembler code in this configuration expects 32 bits. configure --disable-assembly does allow to build the library, but then quite a few tests fail with "bus error": t-toom6h, t-toom8h, t-toom8-sqr, t-div, t-mulmod_bnm1, ..., t-sizeinbase. So more work is needed on the GMP side :-( I think it is possible to use a more traditional ABI on this computer, but that's not interesting. -- Marc Glisse ___ gmp-bugs mailing list gmp-bugs@gmplib.org https://gmplib.org/mailman/listinfo/gmp-bugs
Re: [cfarm-announces] New Arm Morello SoC machine: cfarm240
It seems that uname -p returns aarch64c, configfsf.guess uses that, and configfsf.sub gets confused by that, so it should be reported there. Ah, I already see at least https://lists.gnu.org/archive/html/config-patches/2023-08/msg00043.html so hopefully it will get discussed / solved there. On Thu, 24 Aug 2023, Paul Zimmermann wrote: Hi, gmp 6.3.0 does not compile on this machine: zimmerma@cfarm240:~/gmp-6.3.0 $ ./configure checking build system type... Invalid configuration 'aarch64c-unknown-freebsd14.0': machine 'aarch64c-unknown' not recognized configure: error: /bin/sh ./config.sub aarch64c-unknown-freebsd14.0 failed Should I try a specific ABI? Paul Date: Wed, 23 Aug 2023 14:14:47 -0500 From: CFarm Annoucements via cfarm-announces Cc: CFarm Annoucements The Compile Farm project is pleased to announce the immediate availability of cfarm240, an Arm Morello SoC [1] prototype board running CheriBSD (a FreeBSD derivative). This system-on-chip research platform [2] features a custom quad-core aarch64 Neoverse N1-based CPU implementing CHERI [3] (a memory protection model), and has 32GB system memory. Disk space is limited (~200GB); be mindful of your resource usage. We are still in the process of transitioning to our new domain name and website; please SSH to cfarm240.cfarm.net. Notes: * Morello boards are the only physical implementation of this ISA; lessons learned will be carried to future Arm extensions, so binary compatibility with Morello is not guaranteed. * You will want to read about packages [4]. * If you need help with CHERI-specific problems (not Compile Farm issues), consider joining their Slack [5]. Thank you to the University of Cambridge for hosting (and developing) this machine! [1]: https://www.arm.com/architecture/cpu/morello [2]: https://www.cl.cam.ac.uk/research/security/ctsrd/cheri/cheri-morello.html [3]: https://www.cl.cam.ac.uk/research/security/ctsrd/cheri/ [4]: https://ctsrd-cheri.github.io/cheribsd-getting-started/packages/index.html [5]: https://www.cl.cam.ac.uk/research/security/ctsrd/cheri/cheri-slack.html ___ cfarm-announces mailing list cfarm-announ...@lists.tetaneutral.net https://lists.tetaneutral.net/listinfo/cfarm-announces ___ gmp-bugs mailing list gmp-bugs@gmplib.org https://gmplib.org/mailman/listinfo/gmp-bugs -- Marc Glisse ___ gmp-bugs mailing list gmp-bugs@gmplib.org https://gmplib.org/mailman/listinfo/gmp-bugs
Re: [cfarm-announces] New Arm Morello SoC machine: cfarm240
Hi, gmp 6.3.0 does not compile on this machine: zimmerma@cfarm240:~/gmp-6.3.0 $ ./configure checking build system type... Invalid configuration 'aarch64c-unknown-freebsd14.0': machine 'aarch64c-unknown' not recognized configure: error: /bin/sh ./config.sub aarch64c-unknown-freebsd14.0 failed Should I try a specific ABI? Paul > Date: Wed, 23 Aug 2023 14:14:47 -0500 > From: CFarm Annoucements via cfarm-announces > > Cc: CFarm Annoucements > > The Compile Farm project is pleased to announce the immediate > availability of cfarm240, an Arm Morello SoC [1] prototype board > running CheriBSD (a FreeBSD derivative). > > This system-on-chip research platform [2] features a custom > quad-core aarch64 Neoverse N1-based CPU implementing CHERI [3] > (a memory protection model), and has 32GB system memory. Disk > space is limited (~200GB); be mindful of your resource usage. > > We are still in the process of transitioning to our new domain > name and website; please SSH to cfarm240.cfarm.net. > > Notes: > > * Morello boards are the only physical implementation of this > ISA; lessons learned will be carried to future Arm extensions, > so binary compatibility with Morello is not guaranteed. > > * You will want to read about packages [4]. > > * If you need help with CHERI-specific problems (not Compile > Farm issues), consider joining their Slack [5]. > > Thank you to the University of Cambridge for hosting > (and developing) this machine! > > > [1]: https://www.arm.com/architecture/cpu/morello > [2]: https://www.cl.cam.ac.uk/research/security/ctsrd/cheri/cheri-morello.html > [3]: https://www.cl.cam.ac.uk/research/security/ctsrd/cheri/ > [4]: > https://ctsrd-cheri.github.io/cheribsd-getting-started/packages/index.html > [5]: https://www.cl.cam.ac.uk/research/security/ctsrd/cheri/cheri-slack.html > ___ > cfarm-announces mailing list > cfarm-announ...@lists.tetaneutral.net > https://lists.tetaneutral.net/listinfo/cfarm-announces > ___ gmp-bugs mailing list gmp-bugs@gmplib.org https://gmplib.org/mailman/listinfo/gmp-bugs
