On Sat, Aug 5, 2017 at 12:58 PM, Heinrich Schuchardt <xypron.g...@gmx.de> wrote:
> To understand what happens in OpenProtocol it is necessary to know
> the protocol interface GUID. Let's write a debug message.

btw, my "efi_loader: add guidstr helper" patch could make this a bit
simpler I suppose.. either way it would be nice to have a macro like
this.. I had been using something similar for debug locally

Reviewed-by: Rob Clark <robdcl...@gmail.com>

BR,
-R

> Signed-off-by: Heinrich Schuchardt <xypron.g...@gmx.de>
> ---
> v2:
>         fix typo in commit message
> ---
>  include/efi_loader.h          | 14 ++++++++++++++
>  lib/efi_loader/efi_boottime.c |  2 ++
>  2 files changed, 16 insertions(+)
>
> diff --git a/include/efi_loader.h b/include/efi_loader.h
> index 037cc7c543..553c615f11 100644
> --- a/include/efi_loader.h
> +++ b/include/efi_loader.h
> @@ -51,6 +51,20 @@ const char *__efi_nesting_dec(void);
>         debug("%sEFI: Return From: %s\n", __efi_nesting_dec(), #exp); \
>         } while(0)
>
> +/*
> + * Write GUID
> + */
> +#define EFI_PRINT_GUID(txt, guid) ({ \
> +       debug("EFI: %s %02x%02x%02x%02x-%02x%02x-%02x%02x-" \
> +             "%02x%02x%02x%02x%02x%02x%02x%02x\n", \
> +             txt, ((u8 *)guid)[3], \
> +             ((u8 *)guid)[2], ((u8 *)guid)[1], ((u8 *)guid)[0], \
> +             ((u8 *)guid)[5], ((u8 *)guid)[4], ((u8 *)guid)[7], \
> +             ((u8 *)guid)[6], ((u8 *)guid)[8], ((u8 *)guid)[9], \
> +             ((u8 *)guid)[10], ((u8 *)guid)[11], ((u8 *)guid)[12], \
> +             ((u8 *)guid)[13], ((u8 *)guid)[14], ((u8 *)guid)[15]); \
> +       })
> +
>  extern struct efi_runtime_services efi_runtime_services;
>  extern struct efi_system_table systab;
>
> diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
> index fb05c9e093..ebb557abb2 100644
> --- a/lib/efi_loader/efi_boottime.c
> +++ b/lib/efi_loader/efi_boottime.c
> @@ -1138,6 +1138,8 @@ static efi_status_t EFIAPI efi_open_protocol(
>                 goto out;
>         }
>
> +       EFI_PRINT_GUID("protocol:", protocol);
> +
>         switch (attributes) {
>         case EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL:
>         case EFI_OPEN_PROTOCOL_GET_PROTOCOL:
> --
> 2.11.0
>
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