https://bugs.kde.org/show_bug.cgi?id=461855
Bug ID: 461855
Summary: (wine xsavec64) vex amd64->IR: unhandled instruction
bytes: 0x48 0xF 0xC7 0xA1 0xC0 0x0 0x0 0x0 0x48 0xF
Classification: Developer tools
Product: valgrind
Version: 3.19.0
Platform: PCLinuxOS
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: memcheck
Assignee: jsew...@acm.org
Reporter: jrei...@bitwagon.com
Target Milestone: ---
Created attachment 153757
--> https://bugs.kde.org/attachment.cgi?id=153757&action=edit
Hacked and reduced test case based on wine/dlls/ntdll/unix/signal_x86_64.c
SUMMARY
***
NOTE: If you are reporting a crash, please try to attach a backtrace with debug
symbols.
See
https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports
***
Valgrind complains "unhandled instruction bytes" when running wine (the
environment for running Microsoft Windows apps on Linux).
STEPS TO REPRODUCE
1. gcc -c wine_syscall_dispatcher.S ## attached; simplified and hacked from
wine/dlls/ntdll/unix/signal_x86_64.c
2. ld wine_syscall_dispatcher.o ## totally bare executable
3. valgrind ./a.out ## valgrind-3.19.0
OBSERVED RESULT
vex amd64->IR: unhandled instruction bytes: 0x48 0xF 0xC7 0xA1 0xC0 0x0 0x0 0x0
0x48 0xF
vex amd64->IR: REX=1 REX.W=1 REX.R=0 REX.X=0 REX.B=0
vex amd64->IR: VEX=0 VEX.L=0 VEX.nVVVV=0x0 ESC=0F
vex amd64->IR: PFX.66=0 PFX.F2=0 PFX.F3=0
==345631== valgrind: Unrecognised instruction at address 0x4010ce.
EXPECTED RESULT
No complaint about unhandled instruction "xsavec64 0xc0(%rcx)"
SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma:
(available in About System)
KDE Plasma Version:
KDE Frameworks Version:
Qt Version:
ADDITIONAL INFORMATION
Wine source: url = git://source.winehq.org/git/wine.git
commit a8c1d5c108fc57e4d78e9db126f395c89083a83d (HEAD -> master, origin/master,
origin/HEAD)
Date: Mon Nov 14 10:57:50 2022 -0600
Based on mailing list message "Re: [Valgrind-developers] valgrind: Unrecognised
instruction error" from mahin.pan...@actian.com; posted Tue, 1 Nov 2022
10:31:05 +0000
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