Produce a static position independent executable on targets that support it.
A static position independent executable is similar to a static executable,
but can be loaded at any address without a dynamic linker.
Using glibc for static builds, would be less of a leap compared to switching to musl libc (POC in #23203).
fanquake added the label
Build system
on Jul 8, 2022
fanquake marked this as a draft
on Jul 8, 2022
DrahtBot
commented at 10:29 pm on July 8, 2022:
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Conflicts
Reviewers, this pull request conflicts with the following ones:
#33764 (ci: Add Windows + UCRT jobs for cross-compiling and native testing by hebasto)
#33537 ([wip] A more static bitcoin-qt by fanquake)
#33181 (guix: build for Linux HOSTS with -static-libgcc by fanquake)
#32764 (guix: Build for macOS using Clang only by hebasto)
#32162 (depends: Switch from multilib to platform-specific toolchains by hebasto)
#24123 (guix: Pointer Authentication and Branch Target Identification for aarch64 Linux by fanquake)
If you consider this pull request important, please also help to review the conflicting pull requests. Ideally, start with the one that should be merged first.
fanquake force-pushed
on Jul 13, 2022
fanquake
commented at 5:46 pm on July 13, 2022:
member
Rebased, and made small changes to fixup the linter and improve the security/symbol checks.
theuni
commented at 9:00 pm on July 13, 2022:
member
This is amazing!
Using glibc for static builds, would be less of a leap compared to switching to musl libc (POC in #23203).
Hard agree. Static musl builds would be very cool but tricky to audit for parity and thus pretty unlikely to ever become official/supported imo. This is a MUCH more palatable change.
fanquake force-pushed
on Jul 14, 2022
fanquake
commented at 10:41 am on July 14, 2022:
member
Added an additional patch to disable building various features/libs in GCC that we don’t need. i.e libquadmath, libsanitizer, gcov, libada and native language support. This should speed up compiling GCC, and slightly reduces the size of the pthread patch. I’m not currently disabling these features via the available configure flags, because they get passed through to GMP, which cannot handle them.
I’ve also updated -flto usage to be -flto=auto, as that seems to now be the preferred invocation, and it mitigates GCC warning output. i.e:
0lto-wrapper: warning: using serial compilation of 84 LTRANS jobs
1lto-wrapper: note: see the '-flto' option documentation for more information
I’ve also split the ELF PIE check into it’s own func, so we can special-case x86_64, and re-added the list of allowed ELF libs, but special-cased x86_64 to only pass if the list is empty.
luke-jr
commented at 5:00 pm on July 16, 2022:
member
How does this handle resolvers? eg, static glibc 2.33 applications break on systems with glibc 2.34…
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on Jul 30, 2022
Frank-GER
commented at 4:47 pm on August 4, 2022:
none
Which OS did you build on?
On Ubuntu 20.04 after build:
file bitcoind
bitcoind: ELF 64-bit LSB shared object, x86-64, version 1 (GNU/Linux), dynamically linked, for GNU/Linux 3.2.0, stripped
Trying to run it, it crashes after seconds:
addcon thread start
Loading addresses from DNS seed dnsseed.emzy.de.
bitcoind: dl-call-libc-early-init.c:37: _dl_call_libc_early_init: Assertion `sym != NULL’ failed.
Aborted (core dumped)
Any ideas?
fanquake
commented at 8:05 am on August 5, 2022:
member
Which OS did you build on?
The base OS shouldn’t matter, because the build is performed with Guix. However I’ve been performing these builds on Ubuntu 22.04.
Any ideas?
How did you actually build bitcoind? Something like HOSTS="x86_64-linux-gnu" ./contrib/guix/guix-build?
fanquake force-pushed
on Aug 5, 2022
fanquake
commented at 8:39 am on August 5, 2022:
member
Rebased on master. Added a commit to use LIEF master, which reduces the number of changes in our scripts, as support for -static-pie ELF binaries has been added: https://github.com/lief-project/LIEF/issues/747. Will switch to a new release when one is available.
DrahtBot removed the label
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Frank-GER
commented at 5:12 pm on August 5, 2022:
none
How did you actually build bitcoind? Something like HOSTS=“x86_64-linux-gnu” ./contrib/guix/guix-build?
I have just re-tested building the changes here (ef0edd55f3bc1e3f229134ec7ecac632de52eea7), and this produces a -static-pie binary as expected:
0guix-build-ef0edd55f3bc/distsrc-ef0edd55f3bc-x86_64-linux-gnu/src/bitcoind: ELF 64-bit LSB pie executable, x86-64, version 1(GNU/Linux), static-pie linked, for GNU/Linux 3.2.0, with debug_info, not stripped
It’s not clear to me that you are actually running a Guix build.
Frank-GER
commented at 6:22 pm on August 5, 2022:
none
the build I was testing:
~/bitcoin/guix-build-caa066465973/distsrc-caa066465973-x86_64-linux-gnu/src$ file bitcoind
bitcoind: ELF 64-bit LSB shared object, x86-64, version 1 (GNU/Linux), dynamically linked, for GNU/Linux 3.2.0, with debug_info, not stripped
just building again, fresh cloned with commit ef0edd5
export HOSTS=‘x86_64-linux-gnu’
./contrib/guix/guix-build
$ file guix-build-ef0edd55f3bc/distsrc-ef0edd55f3bc-x86_64-linux-gnu/src/bitcoind
guix-build-ef0edd55f3bc/distsrc-ef0edd55f3bc-x86_64-linux-gnu/src/bitcoind: ELF 64-bit LSB shared object, x86-64, version 1 (GNU/Linux), dynamically linked, for GNU/Linux 3.2.0, with debug_info, not stripped
build and run on Ubuntu 20.04
there is no other bitcoind on that OS
Frank-GER
commented at 2:27 pm on August 8, 2022:
none
building the same on Ubuntu 22.04:
file guix-build-ef0edd55f3bc/distsrc-ef0edd55f3bc-x86_64-linux-gnu/src/bitcoind
guix-build-ef0edd55f3bc/distsrc-ef0edd55f3bc-x86_64-linux-gnu/src/bitcoind: ELF 64-bit LSB pie executable, x86-64, version 1 (GNU/Linux), static-pie linked, for GNU/Linux 3.2.0, with debug_info, not stripped
Taking this bitcoind to Ubuntu 20 it shows:
file ./bitcoind
./bitcoind: ELF 64-bit LSB shared object, x86-64, version 1 (GNU/Linux), dynamically linked, for GNU/Linux 3.2.0, with debug_info, not stripped
and crashes with the above mentioned message:
bitcoind: dl-call-libc-early-init.c:37: _dl_call_libc_early_init: Assertion `sym != NULL’ failed.
Aborted (core dumped)
Checksums are the same for both builds (on Ubuntu 20 and 22)
Ubuntu 20 sees it as dynamic linked, Ubuntu 22 as static-pie linked.
On Ubuntu 20 it crashes, on Ubuntu 22 it works.
Same bitcoind on Debian 10:
file ./bitcoind
./bitcoind: ELF 64-bit LSB shared object, x86-64, version 1 (GNU/Linux), dynamically linked, for GNU/Linux 3.2.0, with debug_info, not stripped
ldd ./bitcoind
statically linked
Gets past that point where it crashes on Ubuntu 20 and starts syncing
fanquake force-pushed
on Aug 24, 2022
fanquake
commented at 3:34 pm on August 24, 2022:
member
Pushed a number of changes, and rebased on master.
Switched from glibc 2.35 to 2.36.
Added infra for aarch64 -static-pie builds.
More fine-grained / logical commits.
Updated to the latest version of LIEF (master).
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fanquake renamed this:
[POC] guix: produce a fully -static-pie x86_64 bitcoind using GCC and glibc
[POC] guix: produce a fully `-static-pie` bitcoind
on Jul 27, 2023
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fanquake
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Rebased. Simplified somewhat. Switched to GCC 13.2.0 and glibc 2.39.
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🚧 At least one of the CI tasks failed. Make sure to run all tests locally, according to the
documentation.
Possibly this is due to a silent merge conflict (the changes in this pull request being
incompatible with the current code in the target branch). If so, make sure to rebase on the latest
commit of the target branch.
Leave a comment here, if you need help tracking down a confusing failure.
-static-pie
Produce a static position independent executable on targets that support it.
A static position independent executable is similar to a static executable,
but can be loaded at any address without a dynamic linker.
See https://gcc.gnu.org/onlinedocs/gcc/Link-Options.html
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