Re: [Qemu-devel] [PATCH 1/9] sparc64: trace pstate and global register set changes

[Blue Swirl <blauwirbel@gmail.com>]

On Tue, Jan 5, 2010 at 11:19 PM, Igor V. Kovalenko
<igor.v.kovalenko@gmail.com> wrote:
> From: Igor V. Kovalenko <igor.v.kovalenko@gmail.com>
>
> Signed-off-by: Igor V. Kovalenko <igor.v.kovalenko@gmail.com>
> ---
>  target-sparc/op_helper.c |   20 ++++++++++++++++++++
>  1 files changed, 20 insertions(+), 0 deletions(-)
>
> diff --git a/target-sparc/op_helper.c b/target-sparc/op_helper.c
> index dab2c25..26092e5 100644
> --- a/target-sparc/op_helper.c
> +++ b/target-sparc/op_helper.c
> @@ -11,6 +11,7 @@
>  //#define DEBUG_UNASSIGNED
>  //#define DEBUG_ASI
>  //#define DEBUG_PCALL
> +//#define DEBUG_PSTATE
>
>  #ifdef DEBUG_MMU
>  #define DPRINTF_MMU(fmt, ...)                                   \
> @@ -31,6 +32,13 @@
>     do { printf("ASI: " fmt , ## __VA_ARGS__); } while (0)
>  #endif
>
> +#ifdef DEBUG_PSTATE
> +#define DPRINTF_PSTATE(fmt, ...)                                   \
> +    do { printf("PSTATE: " fmt , ## __VA_ARGS__); } while (0)
> +#else
> +#define DPRINTF_PSTATE(fmt, ...) do {} while (0)
> +#endif
> +
>  #ifdef TARGET_SPARC64
>  #ifndef TARGET_ABI32
>  #define AM_CHECK(env1) ((env1)->pstate & PS_AM)
> @@ -3244,6 +3252,12 @@ static inline uint64_t *get_gregset(uint64_t pstate)
>  {
>     switch (pstate) {
>     default:
> +        DPRINTF_PSTATE("ERROR in get_gregset: active pstate bits=%lX %s %s %s",
> +                pstate,
> +                (pstate&PS_IG)?"IG":"",
> +                (pstate&PS_MG)?"MG":"",
> +                (pstate&PS_AG)?"AG":"" );
> +        /* pass through to normal set of global registers */

%lX format is not correct on 64 bit hosts and nobody uses upper case
hex, please use just %x. The spacing is too tight.

On UltraSPARC-IV and T1/2 the bits are interpreted differently (GL) so
the printout would be wrong, but that can be disregarded for now.

>     case 0:
>         return env->bgregs;
>     case PS_AG:
> @@ -3269,12 +3283,18 @@ static inline void change_pstate(uint64_t new_pstate)
>     new_pstate_regs = new_pstate & 0xc01;
>
>     if (new_pstate_regs != pstate_regs) {
> +        DPRINTF_PSTATE("change_pstate: switching regs old=%lX new=%lX\n",
> +                       pstate_regs, new_pstate_regs);

Same format issue here.

>         // Switch global register bank
>         src = get_gregset(new_pstate_regs);
>         dst = get_gregset(pstate_regs);
>         memcpy32(dst, env->gregs);
>         memcpy32(env->gregs, src);
>     }
> +    else {
> +        DPRINTF_PSTATE("change_pstate: regs new=%lX (unchanged)\n",
> +                       new_pstate_regs);
> +    }

And here.