Re: [RFC PATCH v3 0/2] selftests/x86: sysret_rip update for FRED system

On 24/01/2023 9:32 pm, Li, Xin3 wrote:

...

From: Ammar Faizi ammarfaizi2@gnuweeb.org

This is an RFC patchset v3: sysret_rip test update for Intel FRED architecture.

Xin Li reported sysret_rip test fails at:

    assert(ctx->uc_mcontext.gregs[REG_EFL] ==
           ctx->uc_mcontext.gregs[REG_R11]);

On FRED systems, flags is 0x200a93 and r11 is 0xfeedfacedeadbeef here.

Is this under SIMICS, or elsewhere?  It's doubly weird that flags/%r11 match, but %rip/%rcx don't.

~Andrew