Re: [Qemu-devel] [RFC PATCH 09/11] target/mips: only build mips-semi for softmmu

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

On 5/14/19 5:52 PM, Alex Bennée wrote:
> The is_uhi gates all semihosting calls and always returns false for
> CONFIG_USER_ONLY builds. There is no reason to build and link
> mips-semi for these builds so lets fix that.
> 
> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>

> ---
>  target/mips/Makefile.objs | 3 ++-
>  target/mips/helper.h      | 2 ++
>  target/mips/translate.c   | 8 ++++++++
>  3 files changed, 12 insertions(+), 1 deletion(-)
> 
> diff --git a/target/mips/Makefile.objs b/target/mips/Makefile.objs
> index 651f36f5176..3448ad5e193 100644
> --- a/target/mips/Makefile.objs
> +++ b/target/mips/Makefile.objs
> @@ -1,4 +1,5 @@
>  obj-y += translate.o dsp_helper.o op_helper.o lmi_helper.o helper.o cpu.o
> -obj-y += gdbstub.o msa_helper.o mips-semi.o
> +obj-y += gdbstub.o msa_helper.o
> +obj-$(CONFIG_SOFTMMU) += mips-semi.o
>  obj-$(CONFIG_SOFTMMU) += machine.o cp0_timer.o
>  obj-$(CONFIG_KVM) += kvm.o
> diff --git a/target/mips/helper.h b/target/mips/helper.h
> index a6d687e3405..90ab03b76e3 100644
> --- a/target/mips/helper.h
> +++ b/target/mips/helper.h
> @@ -2,7 +2,9 @@ DEF_HELPER_3(raise_exception_err, noreturn, env, i32, int)
>  DEF_HELPER_2(raise_exception, noreturn, env, i32)
>  DEF_HELPER_1(raise_exception_debug, noreturn, env)
>  
> +#ifndef CONFIG_USER_ONLY
>  DEF_HELPER_1(do_semihosting, void, env)
> +#endif
>  
>  #ifdef TARGET_MIPS64
>  DEF_HELPER_4(sdl, void, env, tl, tl, int)
> diff --git a/target/mips/translate.c b/target/mips/translate.c
> index 3cd5b11b16b..fb905c88b57 100644
> --- a/target/mips/translate.c
> +++ b/target/mips/translate.c
> @@ -13726,6 +13726,14 @@ static inline bool is_uhi(int sdbbp_code)
>  #endif
>  }
>  
> +#ifdef CONFIG_USER_ONLY
> +/* The above should dead-code away any calls to this..*/
> +static inline void gen_helper_do_semihosting(void *env)
> +{
> +    g_assert_not_reached();
> +}
> +#endif
> +
>  static int decode_mips16_opc (CPUMIPSState *env, DisasContext *ctx)
>  {
>      int rx, ry;
>