Hi,

there is a new upstream release of pixmam, which touches the arm64
asm a bit, but I see no mention of BTI / endbr64 in the git log.

Moreover upstreams dropped the autotools based build system in favor
of meson, so it's going to take some effort to upgrade it in xenocara.


On Sat, Mar 16, 2024 at 12:10:19PM +0000, Stuart Henderson wrote:
>  10913 glxgears PSIG  SIGILL SIG_DFL code=ILL_BTCFI addr=0x21ca5a3000 trapno=905969666
> 
> Anyone have suggestions as to how to track this down any further?
> Nothing really useful from gdb (this is from an X build with -g). I
> tried LD_DEBUG to see if that would help ID the library but it didn't
> help me. ltrace with some kernel trace flags enabled too showed it
> happening after opening mesa_shader_cache and doing some zlib
> operations. The only arm64 asm I noticed in X was in pixman.
> 
> $ egdb glxgears
> GNU gdb (GDB) 9.2
> Copyright (C) 2020 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.
> Type "show copying" and "show warranty" for details.
> This GDB was configured as "aarch64-unknown-openbsd7.5".
> Type "show configuration" for configuration details.
> For bug reporting instructions, please see:
> <http://www.gnu.org/software/gdb/bugs/>.
> Find the GDB manual and other documentation resources online at:
>     <http://www.gnu.org/software/gdb/documentation/>.
> 
> For help, type "help".
> Type "apropos word" to search for commands related to "word"...
> Reading symbols from glxgears...
> (gdb) r
> Starting program: /usr/X11R6/bin/glxgears
> [New thread 270983]
> [New thread 518046]
> [New thread 508613]
> [New thread 331478]
> [New thread 562301]
> [New thread 483409]
> [New thread 610898]
> [New thread 306281]
> [New thread 391533]
> [New thread 341931]
> [New thread 504069]
> [New thread 354905]
> [New thread 371905]
> [New thread 482769]
> [New thread 426808]
> [New thread 111193]
> [New thread 617204]
> [New thread 290438]
> [New thread 259400]
> [New thread 183793]
> [New thread 510635]
> [New thread 516288]
> [New thread 558437]
> [New thread 255995]
> [New thread 578587]
> 
> Thread 1 received signal SIGILL, Illegal instruction.
> 0x000000153dac9000 in ?? ()
> (gdb) bt
> #0  0x000000153dac9000 in ?? ()
> Backtrace stopped: previous frame identical to this frame (corrupt stack?)
> (gdb) disassemble
> No function contains program counter for selected frame.
> (gdb) q
> A debugging session is active.
> 
> 	Inferior 1 [process 68970] will be killed.
> 
> Quit anyway? (y or n) y
> 
> 

-- 
Matthieu Herrb