Re: [Qemu-devel] [PATCH 2/2] mips-linux-user: Always support rdhwr.

[Aurelien Jarno <aurelien@aurel32.net>]

On Fri, Mar 30, 2012 at 01:16:37PM -0400, Richard Henderson wrote:
> The kernel will emulate this instruction if it's not supported
> natively.  This insn is used for TLS, among other things, and
> so is required by modern glibc.
> 
> Signed-off-by: Richard Henderson <rth@twiddle.net>
> Cc: Riku Voipio <riku.voipio@iki.fi>
> ---
>  target-mips/translate.c |    4 ++++
>  1 files changed, 4 insertions(+), 0 deletions(-)
> 
> diff --git a/target-mips/translate.c b/target-mips/translate.c
> index 300d95e..ed28ca8 100644
> --- a/target-mips/translate.c
> +++ b/target-mips/translate.c
> @@ -8111,7 +8111,11 @@ gen_rdhwr (CPUMIPSState *env, DisasContext *ctx, int rt, int rd)
>  {
>      TCGv t0;
>  
> +#if !defined(CONFIG_USER_ONLY)
> +    /* The Linux kernel will emulate rdhwr if it's not supported natively.
> +       Therefore only check the ISA in system mode.  */
>      check_insn(env, ctx, ISA_MIPS32R2);
> +#endif
>      t0 = tcg_temp_new();
>  
>      switch (rd) {

Thanks, applied.
 
-- 
Aurelien Jarno                          GPG: 1024D/F1BCDB73
aurelien@aurel32.net                 http://www.aurel32.net