[PATCH 4/4] ntdll: Implement arm64 sigcontext access for macOS

[André Hentschel]

Am 14.08.20 um 13:54 schrieb Martin Storsjo:
> Signed-off-by: Martin Storsjo <martin at martin.st>
> ---
>  dlls/ntdll/unix/signal_arm64.c | 46 ++++++++++++++++++++++++++++++++++
>  1 file changed, 46 insertions(+)
> 
> diff --git a/dlls/ntdll/unix/signal_arm64.c b/dlls/ntdll/unix/signal_arm64.c
> index cc34690f96..f1c6cdc5fa 100644
> --- a/dlls/ntdll/unix/signal_arm64.c
> +++ b/dlls/ntdll/unix/signal_arm64.c
> @@ -110,6 +110,20 @@ static DWORD64 get_fault_esr( ucontext_t *sigcontext )
>      return 0;
>  }
>  
> +#elif defined(__APPLE__)
> +
> +/* Special Registers access  */
> +# define SP_sig(context)            ((context)->uc_mcontext->__ss.__sp)    /* Stack pointer */
> +# define PC_sig(context)            ((context)->uc_mcontext->__ss.__pc)    /* Program counter */
> +# define PSTATE_sig(context)        ((context)->uc_mcontext->__ss.__cpsr)  /* Current State Register */
> +# define FP_sig(context)            ((context)->uc_mcontext->__ss.__fp)    /* Frame pointer */
> +# define LR_sig(context)            ((context)->uc_mcontext->__ss.__lr)    /* Link Register */
> +
> +static DWORD64 get_fault_esr( ucontext_t *sigcontext )
> +{
> +    return sigcontext->uc_mcontext->__es.__esr;
> +}
> +
>  #endif /* linux */
>  
>  static pthread_key_t teb_key;
> @@ -299,7 +313,11 @@ static void save_context( CONTEXT *context, const ucontext_t *sigcontext )
>      context->Sp     = SP_sig(sigcontext);     /* Stack pointer */
>      context->Pc     = PC_sig(sigcontext);     /* Program Counter */
>      context->Cpsr   = PSTATE_sig(sigcontext); /* Current State Register */
> +#ifdef linux
>      for (i = 0; i <= 28; i++) context->u.X[i] = REGn_sig( i, sigcontext );
> +#elif defined(__APPLE__)
> +    for (i = 0; i <= 28; i++) context->u.X[i] = sigcontext->uc_mcontext->__ss.__x[i];
> +#endif
>  }

Hi Martin!

maybe I miss something, but isn't it possible to write an Apple version of the REGn_sig() macro?