Re: [PATCH] uprobes/x86: fix detection of 32-bit user mode

[Thomas Gleixner]

On Sat, 24 Aug 2019, Thomas Gleixner wrote:
> On Sun, 28 Jul 2019, Sebastian Mayr wrote:
> 
> > -static inline int sizeof_long(void)
> > +static inline int sizeof_long(struct pt_regs *regs)
> >  {
> > -   return in_ia32_syscall() ? 4 : 8;
> 
>   This wants a comment.
> 
> > +   return user_64bit_mode(regs) ? 8 : 4;

The more simpler one liner is to check

    test_thread_flag(TIF_IA32)

which is only true for IA32 and independent of syscalls, exceptions ...

Thanks,

        tglx