Re: [Qemu-devel] [PATCH v2 10/15] target/arm/arm-semi: Factor out implementation of SYS_ISTTY

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

On 9/16/19 4:15 PM, Peter Maydell wrote:
> Factor out the implementation of SYS_ISTTY via the new function
> tables.
> 
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

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

> ---
>   target/arm/arm-semi.c | 20 +++++++++++++++-----
>   1 file changed, 15 insertions(+), 5 deletions(-)
> 
> diff --git a/target/arm/arm-semi.c b/target/arm/arm-semi.c
> index 958083a105c..ecd51338fd3 100644
> --- a/target/arm/arm-semi.c
> +++ b/target/arm/arm-semi.c
> @@ -388,6 +388,7 @@ typedef uint32_t sys_writefn(ARMCPU *cpu, GuestFD *gf,
>                                target_ulong buf, uint32_t len);
>   typedef uint32_t sys_readfn(ARMCPU *cpu, GuestFD *gf,
>                               target_ulong buf, uint32_t len);
> +typedef uint32_t sys_isattyfn(ARMCPU *cpu, GuestFD *gf);
>   
>   static uint32_t host_closefn(ARMCPU *cpu, GuestFD *gf)
>   {
> @@ -436,6 +437,11 @@ static uint32_t host_readfn(ARMCPU *cpu, GuestFD *gf,
>       return len - ret;
>   }
>   
> +static uint32_t host_isattyfn(ARMCPU *cpu, GuestFD *gf)
> +{
> +    return isatty(gf->hostfd);
> +}
> +
>   static uint32_t gdb_closefn(ARMCPU *cpu, GuestFD *gf)
>   {
>       return arm_gdb_syscall(cpu, arm_semi_cb, "close,%x", gf->hostfd);
> @@ -457,10 +463,16 @@ static uint32_t gdb_readfn(ARMCPU *cpu, GuestFD *gf,
>                              gf->hostfd, buf, len);
>   }
>   
> +static uint32_t gdb_isattyfn(ARMCPU *cpu, GuestFD *gf)
> +{
> +    return arm_gdb_syscall(cpu, arm_semi_cb, "isatty,%x", gf->hostfd);
> +}
> +
>   typedef struct GuestFDFunctions {
>       sys_closefn *closefn;
>       sys_writefn *writefn;
>       sys_readfn *readfn;
> +    sys_isattyfn *isattyfn;
>   } GuestFDFunctions;
>   
>   static const GuestFDFunctions guestfd_fns[] = {
> @@ -468,11 +480,13 @@ static const GuestFDFunctions guestfd_fns[] = {
>           .closefn = host_closefn,
>           .writefn = host_writefn,
>           .readfn = host_readfn,
> +        .isattyfn = host_isattyfn,
>       },
>       [GuestFDGDB] = {
>           .closefn = gdb_closefn,
>           .writefn = gdb_writefn,
>           .readfn = gdb_readfn,
> +        .isattyfn = gdb_isattyfn,
>       },
>   };
>   
> @@ -631,11 +645,7 @@ target_ulong do_arm_semihosting(CPUARMState *env)
>               return set_swi_errno(env, -1);
>           }
>   
> -        if (use_gdb_syscalls()) {
> -            return arm_gdb_syscall(cpu, arm_semi_cb, "isatty,%x", gf->hostfd);
> -        } else {
> -            return isatty(gf->hostfd);
> -        }
> +        return guestfd_fns[gf->type].isattyfn(cpu, gf);
>       case TARGET_SYS_SEEK:
>           GET_ARG(0);
>           GET_ARG(1);
>