On Wed, Jan 29, 2025 at 11:54:34PM +0300, Dmitry Shachnev wrote: > In other news, I tried to use different linkers and linker options. With all > linkers, it crashes, but in a bit different ways: > > - bfd (default): jump happens to stderr(). > > - gold: jump happens to some incorrect place in libgallium-24.3.4.so: > https://paste.debian.net/1347044/ > https://paste.debian.net/1347045/ > > - lld: jump happens to 0x0. > > - bfd with -Wl,-z,now: *** stack smashing detected *** but in the same > location, when attempting to do driSwapBuffers(pdraw->dri_drawable). > > Also I tried a different compiler (clang), and did not notice any difference > compared to gcc. > > In case someone else wants to take a look at this, here is how I test it: > [...]
First, I found an easier way to reproduce this issue. Installing mesa-utils package and running "xvfb-run -a glxgears" is enough to trigger it. Second, I noticed that building without -DUSE_PPC64LE_ASM makes the issue go away. Maybe there is some problem with the assembly (entry_ppc64le_tls.h) but I can’t say what exactly. Anyway, I submitted a merge request to disable assembly for now: https://salsa.debian.org/xorg-team/lib/mesa/-/merge_requests/52 Dear Debian powerpc porters, if someone has an idea what happens here and whether it can be fixed in a better way, any help would be welcome! Please see my previous comments on this bug for more details. -- Dmitry Shachnev
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