Created attachment 176367 [details] This file contains the output with debug logs. SUMMARY A hello world application also produces this error of unhandled instruction bytes. This happens only on amd zen4 arch and even on ice-lake CPUs but not on zen2. STEPS TO REPRODUCE 1. 2. 3. OBSERVED RESULT EXPECTED RESULT SOFTWARE/OS VERSIONS Linux: ``` [satishk@tcn538 temp]$ uname -a Linux tcn538.local.snellius.surf.nl 5.14.0-427.31.1.el9_4.x86_64 #1 SMP PREEMPT_DYNAMIC Fri Aug 9 14:06:03 EDT 2024 x86_64 x86_64 x86_64 GNU/Linux [satishk@tcn538 temp]$ cat /etc/os os-release ostree/ [satishk@tcn538 temp]$ cat /etc/os-release NAME="Red Hat Enterprise Linux" VERSION="9.4 (Plow)" ID="rhel" ID_LIKE="fedora" VERSION_ID="9.4" PLATFORM_ID="platform:el9" PRETTY_NAME="Red Hat Enterprise Linux 9.4 (Plow)" ANSI_COLOR="0;31" LOGO="fedora-logo-icon" CPE_NAME="cpe:/o:redhat:enterprise_linux:9::baseos" HOME_URL="https://www.redhat.com/" DOCUMENTATION_URL="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9" BUG_REPORT_URL="https://bugzilla.redhat.com/" REDHAT_BUGZILLA_PRODUCT="Red Hat Enterprise Linux 9" REDHAT_BUGZILLA_PRODUCT_VERSION=9.4 REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux" REDHAT_SUPPORT_PRODUCT_VERSION="9.4" ```
That's an EVEX prefix so it's an AVX-512 instruction, or at least uses an EVEX encoding which amounts to needing AVX-512 support in valgrind. *** This bug has been marked as a duplicate of bug 383010 ***