f3fa74a8f7
The toolchain-builder project reported an issue with Qemu 7.2.0 for
x86-core2--glibc--bleeding-edge toolchain [1]:
Run /sbin/init as init process
random: fast init done
EXT4-fs (vda): warning: mounting unchecked fs, running e2fsck is recommended
EXT4-fs (vda): re-mounted. Opts: (null). Quota mode: disabled.
Starting syslogd: OK
traps: syslogd[52] general protection fault ip:b7e21465 sp:bfe59e6c error:0 in libc.so.6[b7d9b000+123000]
Starting klogd: OK
traps: klogd[56] general protection fault ip:b7e94465 sp:bf8f069c error:0 in libc.so.6[b7e0e000+123000]
Running sysctl: traps: logger[62] general protection fault ip:b7e48b6c sp:bfd7d194 error:0 in libc.so.6[b7e05000+123000]
Segmentation fault
traps: logger[64] general protection fault ip:b7dd3b6c sp:bf9b8604 error:0 in libc.so.6[b7d90000+123000]
Segmentation fault
(Followed by a kernel panic.)
Testing with the pevious Qemu release (7.1.0) allows to boot the system without any problem.
Building qemu sources between 7.1.0 and 7.2.0 allows to identify the first "bad" commit [2] and
report to the Qemu project [3].
Thanks to Qemu maintainers review, several issues was noticed:
"The default i386 busybox build config does not respect glibc's requirements around stack alignment
(see [4] for previous discussions and a workaround)."
Disabling CONFIG_STACK_OPTIMIZATION_386 option (as suggested in the Gentoo bug report) fixed the issue!
This option has been added and enabled by default in buxybox 1_29_0, so it was used since then the for
Buildroot's qemu defconfig.
Note: The x86-i686--glibc--bleeding-edge (generic x86) doesn't trigger the issue with
CONFIG_STACK_OPTIMIZATION_386 enabled.
Fixes:
https://gitlab.com/buildroot.org/toolchains-builder/-/jobs/3731683337
[1] https://gitlab.com/buildroot.org/toolchains-builder/-/jobs/3731683337
[2]
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|---|---|---|
| arch | ||
| board | ||
| boot | ||
| configs | ||
| docs | ||
| fs | ||
| linux | ||
| package | ||
| support | ||
| system | ||
| toolchain | ||
| utils | ||
| .checkpackageignore | ||
| .clang-format | ||
| .defconfig | ||
| .flake8 | ||
| .gitignore | ||
| .gitlab-ci.yml | ||
| .shellcheckrc | ||
| CHANGES | ||
| Config.in | ||
| Config.in.legacy | ||
| COPYING | ||
| DEVELOPERS | ||
| Makefile | ||
| Makefile.legacy | ||
| README | ||
Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation. The documentation can be found in docs/manual. You can generate a text document with 'make manual-text' and read output/docs/manual/manual.text. Online documentation can be found at http://buildroot.org/docs.html To build and use the buildroot stuff, do the following: 1) run 'make menuconfig' 2) select the target architecture and the packages you wish to compile 3) run 'make' 4) wait while it compiles 5) find the kernel, bootloader, root filesystem, etc. in output/images You do not need to be root to build or run buildroot. Have fun! Buildroot comes with a basic configuration for a number of boards. Run 'make list-defconfigs' to view the list of provided configurations. Please feed suggestions, bug reports, insults, and bribes back to the buildroot mailing list: buildroot@buildroot.org You can also find us on #buildroot on OFTC IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches