[Bug target/112654] bpf: bpf program load failure

[brianwitte at mailfence dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112654

Brian Witte  changed:

   What|Removed |Added

 Status|UNCONFIRMED |RESOLVED
 Resolution|--- |INVALID

--- Comment #5 from Brian Witte  ---
My issue is now fixed.

As Jose said, the core issue was my kernel (Debian 6.5.10-1) needing the
-mcpu=v3 flag in order to properly compile for the bpf target.

Closing issue.

Thanks for the help!

[Bug target/112654] bpf: bpf program load failure

[jemarch at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112654

--- Comment #4 from Jose E. Marchesi  ---
I think the problem here may be that OP's kernel doesn't understand BPF V4
instructions, and the program above has been compiled with them (movs).  Try to
use -mcpu=v3?

[Bug target/112654] bpf: bpf program load failure

[jemarch at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112654

--- Comment #3 from Jose E. Marchesi  ---
The instruction failing validation seems to be:

  e0:   bf a4 00 00 00 00 00 00 mov %r4,%r10

Which is a regular MOV instruction with zeroes in imm32 and offset16.  It has
SRC=X.  So I don't understand why the verifier is rejecting that instruction...

[Bug target/112654] bpf: bpf program load failure

[brianwitte at mailfence dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112654

--- Comment #2 from Brian Witte  ---
$ ./pretty_uname.sh 
System Information
--
Kernel Name:   Linux
Node Name: debian
Kernel Release:6.5.0-4-amd64
Kernel Version:#1 SMP PREEMPT_DYNAMIC Debian 6.5.10-1 (2023-11-03)
Machine:   x86_64
Operating System:  GNU/Linux
Distribution:  Debian GNU/Linux

[Bug target/112654] bpf: bpf program load failure

[brianwitte at mailfence dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112654

--- Comment #1 from Brian Witte  ---
Created attachment 56658
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56658=edit
this is a *.tmp.s file