Re: [PATCH 2/2] OvmfPkg/PlatformPei: sync AmdSevInitialize() definition with declaration

Re: [PATCH 2/2] OvmfPkg/PlatformPei: sync AmdSevInitialize() definition with declaration

[Brijesh Singh]

On 02/06/2018 04:01 PM, Laszlo Ersek wrote:
> "Platform.h" declares the AmdSevInitialize() function without EFIAPI, but
> the definition in "AmdSev.c" includes EFIAPI.
> 
> GCC toolchains without LTO do not catch this error because "AmdSev.c" does
> not include "Platform.h"; i.e. the declaration used by callers such as
> "Platform.c" is not actually matched against the function definition at
> build time.
> 
> With LTO enabled, the mismatch is found -- however, as a warning only, due
> to commit f8d0b9662993 ("BaseTools GCC5: disable warnings-as-errors for
> now", 2016-08-03).
> 
> Include the header in the C file (which turns the issue into a hard build
> error on all GCC toolchains), plus sync the declaration from the header
> file to the C file.
> 
> There's been no functional breakage because AmdSevInitialize() takes no
> parameters.
> 
> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
> Cc: Brijesh Singh <brijesh.singh@amd.com>
> Cc: Jordan Justen <jordan.l.justen@intel.com>
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Laszlo Ersek <lersek@redhat.com>


Reviewed-by: Brijesh Singh <brijesh.singh@amd.com>

Thanks

Re: [PATCH 0/2] sync some function definitions with their declarations

[Carsey, Jaben]

Reviewed-by Jaben Carsey <Jaben.carsey@intel.com>

> On Feb 6, 2018, at 2:01 PM, Laszlo Ersek <lersek@redhat.com> wrote:
> 
> Repo:   https://github.com/lersek/edk2.git
> Branch: sync_defs_to_decls
> 
> The patches say it all, just a side remark up here:
> 
> These errors would have been caught long ago if we had enabled the
> "-Wmissing-prototypes" gcc option.
> 
> (Unfortunately, we can't enable that option even now, because it --
> laudably -- forces the programmer to give internal linkage ("STATIC") to
> their helper / local functions, and -- as we've learned -- some versions
> of the the Visual Studio debugger choke on STATIC functions. Thus, core
> modules basically never make their internal functions STATIC.)
> 
> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
> Cc: Brijesh Singh <brijesh.singh@amd.com>
> Cc: Jaben Carsey <jaben.carsey@intel.com>
> Cc: Jordan Justen <jordan.l.justen@intel.com>
> Cc: Ruiyu Ni <ruiyu.ni@intel.com>
> 
> Thanks
> Laszlo
> 
> Laszlo Ersek (2):
>  ShellPkg/UefiShellDebug1CommandsLib: sync Compress() definition with
>    decl.
>  OvmfPkg/PlatformPei: sync AmdSevInitialize() definition with
>    declaration
> 
> OvmfPkg/PlatformPei/AmdSev.c                           |  3 ++-
> ShellPkg/Library/UefiShellDebug1CommandsLib/Compress.c | 15 +++++++++------
> 2 files changed, 11 insertions(+), 7 deletions(-)
> 
> -- 
> 2.14.1.3.gb7cf6e02401b
> 

Re: [PATCH 2/2] OvmfPkg/PlatformPei: sync AmdSevInitialize() definition with declaration

[Ard Biesheuvel]

On 6 February 2018 at 23:01, Laszlo Ersek <lersek@redhat.com> wrote:
> "Platform.h" declares the AmdSevInitialize() function without EFIAPI, but
> the definition in "AmdSev.c" includes EFIAPI.
>
> GCC toolchains without LTO do not catch this error because "AmdSev.c" does
> not include "Platform.h"; i.e. the declaration used by callers such as
> "Platform.c" is not actually matched against the function definition at
> build time.
>
> With LTO enabled, the mismatch is found -- however, as a warning only, due
> to commit f8d0b9662993 ("BaseTools GCC5: disable warnings-as-errors for
> now", 2016-08-03).
>
> Include the header in the C file (which turns the issue into a hard build
> error on all GCC toolchains), plus sync the declaration from the header
> file to the C file.
>
> There's been no functional breakage because AmdSevInitialize() takes no
> parameters.
>
> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
> Cc: Brijesh Singh <brijesh.singh@amd.com>
> Cc: Jordan Justen <jordan.l.justen@intel.com>
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Laszlo Ersek <lersek@redhat.com>

Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>

> ---
>  OvmfPkg/PlatformPei/AmdSev.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/OvmfPkg/PlatformPei/AmdSev.c b/OvmfPkg/PlatformPei/AmdSev.c
> index 1539e5b5cdce..ad31b69fb032 100644
> --- a/OvmfPkg/PlatformPei/AmdSev.c
> +++ b/OvmfPkg/PlatformPei/AmdSev.c
> @@ -23,6 +23,8 @@
>  #include <Register/Amd/Cpuid.h>
>  #include <Library/MemEncryptSevLib.h>
>
> +#include "Platform.h"
> +
>  /**
>
>    Function checks if SEV support is available, if present then it sets
> @@ -30,7 +32,6 @@
>
>    **/
>  VOID
> -EFIAPI
>  AmdSevInitialize (
>    VOID
>    )
> --
> 2.14.1.3.gb7cf6e02401b
>