Re: [Qemu-devel] [Qemu-arm] [PATCH 11/15] target/arm: Make arm_cpu_dump_state() handle the M-profile XPSR

["Edgar E. Iglesias" <edgar.iglesias@gmail.com>]

On Wed, Aug 02, 2017 at 05:43:57PM +0100, Peter Maydell wrote:
> Make the arm_cpu_dump_state() debug logging handle the M-profile XPSR
> rather than assuming it's an A-profile CPSR.  On M profile the PSR
> line of a register dump will now look like this:
> 
> XPSR=41000000 -Z-- T priv-thread
> 
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>


> ---
>  target/arm/translate.c | 58 ++++++++++++++++++++++++++++++++++----------------
>  1 file changed, 40 insertions(+), 18 deletions(-)
> 
> diff --git a/target/arm/translate.c b/target/arm/translate.c
> index 3c14cb0..e52a6d7 100644
> --- a/target/arm/translate.c
> +++ b/target/arm/translate.c
> @@ -12215,8 +12215,6 @@ void arm_cpu_dump_state(CPUState *cs, FILE *f, fprintf_function cpu_fprintf,
>      ARMCPU *cpu = ARM_CPU(cs);
>      CPUARMState *env = &cpu->env;
>      int i;
> -    uint32_t psr;
> -    const char *ns_status;
>  
>      if (is_a64(env)) {
>          aarch64_cpu_dump_state(cs, f, cpu_fprintf, flags);
> @@ -12230,24 +12228,48 @@ void arm_cpu_dump_state(CPUState *cs, FILE *f, fprintf_function cpu_fprintf,
>          else
>              cpu_fprintf(f, " ");
>      }
> -    psr = cpsr_read(env);
>  
> -    if (arm_feature(env, ARM_FEATURE_EL3) &&
> -        (psr & CPSR_M) != ARM_CPU_MODE_MON) {
> -        ns_status = env->cp15.scr_el3 & SCR_NS ? "NS " : "S ";
> +    if (arm_feature(env, ARM_FEATURE_M)) {
> +        uint32_t xpsr = xpsr_read(env);
> +        const char *mode;
> +
> +        if (xpsr & XPSR_EXCP) {
> +            mode = "handler";
> +        } else {
> +            if (env->v7m.control & R_V7M_CONTROL_NPRIV_MASK) {
> +                mode = "unpriv-thread";
> +            } else {
> +                mode = "priv-thread";
> +            }
> +        }
> +
> +        cpu_fprintf(f, "XPSR=%08x %c%c%c%c %c %s\n",
> +                    xpsr,
> +                    xpsr & XPSR_N ? 'N' : '-',
> +                    xpsr & XPSR_Z ? 'Z' : '-',
> +                    xpsr & XPSR_C ? 'C' : '-',
> +                    xpsr & XPSR_V ? 'V' : '-',
> +                    xpsr & XPSR_T ? 'T' : 'A',
> +                    mode);
>      } else {
> -        ns_status = "";
> -    }
> -
> -    cpu_fprintf(f, "PSR=%08x %c%c%c%c %c %s%s%d\n",
> -                psr,
> -                psr & (1 << 31) ? 'N' : '-',
> -                psr & (1 << 30) ? 'Z' : '-',
> -                psr & (1 << 29) ? 'C' : '-',
> -                psr & (1 << 28) ? 'V' : '-',
> -                psr & CPSR_T ? 'T' : 'A',
> -                ns_status,
> -                cpu_mode_names[psr & 0xf], (psr & 0x10) ? 32 : 26);
> +        uint32_t psr = cpsr_read(env);
> +        const char *ns_status = "";
> +
> +        if (arm_feature(env, ARM_FEATURE_EL3) &&
> +            (psr & CPSR_M) != ARM_CPU_MODE_MON) {
> +            ns_status = env->cp15.scr_el3 & SCR_NS ? "NS " : "S ";
> +        }
> +
> +        cpu_fprintf(f, "PSR=%08x %c%c%c%c %c %s%s%d\n",
> +                    psr,
> +                    psr & CPSR_N ? 'N' : '-',
> +                    psr & CPSR_Z ? 'Z' : '-',
> +                    psr & CPSR_C ? 'C' : '-',
> +                    psr & CPSR_V ? 'V' : '-',
> +                    psr & CPSR_T ? 'T' : 'A',
> +                    ns_status,
> +                    cpu_mode_names[psr & 0xf], (psr & 0x10) ? 32 : 26);
> +    }
>  
>      if (flags & CPU_DUMP_FPU) {
>          int numvfpregs = 0;
> -- 
> 2.7.4
> 
>