Re: [PATCH v11 19/26] linux-user: Add LoongArch signal support

[gaosong]

    Hi Richard,

On 2021/11/20 下午6:33, Richard Henderson wrote:

> > +{
> >         
> >         +    int i;
> >         
> >         +
> >         
> >         +    __put_user(env->pc, &sc->sc_pc);
> >         
> >         +
> >         
> >         +    __put_user(0, &sc->sc_gpr[0]);
> >         
> >         +    for (i = 1; i < 32; ++i) {
> >         
> >         +        __put_user(env->gpr[i], &sc->sc_gpr[i]);
> >         
> >         +    }
> >         
> >         +
> >         
> >         +    for (i = 0; i < 32; ++i) {
> >         
> >         +        __put_user(env->fpr[i], &sc->sc_fpr[i]);
> >         
> >         +    }
> >         
> >         +}
> >         
> >       
>       
>       Missing fcsr and fcc.
>     
    I see that  kernel  define  the fcc used type uint64_t,   and  used 
    movgr2cf/movcf2gr  save and restore the fcc0-fcc7.
    but  qemu define  fcc0-fcc7 as  bool cf[8] at
    target/loongarch/cpu.h,   how qemu can  save/restore fcc,  Do you
    have any idea? 
    Does we can define the fcc   as   bool cf[8]  at  struct
    target_sigcontext?
    
    Thanks
    Song Gao