Re: [PATCH v4 0/2] MR7064: ntdll: Check for invalid %gs value in 32-bit code on WoW64.

[William Horvath (＠whrvth)]

On Sun Dec 22 23:30:51 2024 +0000, William Horvath wrote:
> Some testing on macOS 13 showed that the check in
> `virtual_is_valid_code_address( instr, 1 )` leads to an early exit that
> breaks the fix, because the view->protect flags are missing
> `VPROT_SYSTEM`. I'm not sure what's causing this difference.
> For the minimal test program, simply removing that
> `virtual_is_valid_code_address` check allows it to work, but that
> doesn't seem like a robust solution.

Fixed by checking for `CS_sig(sigcontext) == cs64_sel` instead as per Jinoh Kang's suggestion.