Re: [RFC PATCH 08/11] gdbstub: extend GByteArray to read register helpers

[Richard Henderson <richard.henderson@linaro.org>]

On 11/15/19 6:29 PM, Alex Bennée wrote:
> +++ b/target/arm/helper.c
> @@ -47,30 +47,27 @@ static bool get_phys_addr_lpae(CPUARMState *env, target_ulong address,
>  
>  static void switch_mode(CPUARMState *env, int mode);
>  
> -static int vfp_gdb_get_reg(CPUARMState *env, uint8_t *buf, int reg)
> +static int vfp_gdb_get_reg(CPUARMState *env, GByteArray *buf, int reg)
>  {
>      int nregs;
>  
>      /* VFP data registers are always little-endian.  */
>      nregs = arm_feature(env, ARM_FEATURE_VFP3) ? 32 : 16;
>      if (reg < nregs) {
> -        stq_le_p(buf, *aa32_vfp_dreg(env, reg));
> -        return 8;
> +        return gdb_get_reg64(buf, *aa32_vfp_dreg(env, reg));
>      }
>      if (arm_feature(env, ARM_FEATURE_NEON)) {
>          /* Aliases for Q regs.  */
>          nregs += 16;
>          if (reg < nregs) {
>              uint64_t *q = aa32_vfp_qreg(env, reg - 32);
> -            stq_le_p(buf, q[0]);
> -            stq_le_p(buf + 8, q[1]);
> -            return 16;
> +            return gdb_get_reg128(buf, q[0], q[1]);
>          }

Mostly ok, except for this change, which has the same endianness problem that
the other ARM change did.  Why is this not done in patch 6 with the other?


r~