LocateHandle for gEfiShellProtocolGuid is failing in my application

LocateHandle for gEfiShellProtocolGuid is failing in my application

[GN Keshava]

Hi,

I'm developing a shell application. A call to LocateHandle for
gEfiShellProtocolGuid is failing with Status 0x0E.

Below is my code. Please let me know what I'm doing wrong.

Status = gBS->LocateHandle(ByProtocol, &gEfiShellProtocolGuid, NULL,
&BufferSize, Buffer); // Get BufferSize
if (EFI_ERROR(Status))
Print(L"LocateHandle Status 0x%x\n",Status);

Status = gBS->AllocatePool(EfiBootServicesData, BufferSize,
(void**)&Buffer);
if (EFI_ERROR(Status))
Print(L"AllocatePool Status 0x%x\n",Status);

Status = gBS->LocateHandle(ByProtocol, &gEfiShellProtocolGuid, NULL,
&BufferSize, Buffer);
if (EFI_ERROR(Status))
Print(L"LocateHandle Status 0x%x\n",Status);

All calls failing with Status being 0x0E. Please help me to solve this. Is
there any special requirement for using this protocol?

Thanks.
Regards,
Keshava

Re: LocateHandle for gEfiShellProtocolGuid is failing in my application

[Carsey, Jaben]

Hi Keshava,

few questions: 
Is there a reason that you are not using ShellLib to facilitate your app functionality?  That library makes lots of things a lot easier.
Why do you use LocateHandle and not LocateProtocol?
Are you sure about that return code?  Usually most-sig-bit is set for error returns.

Does the following snippet of code find a valid instance?

    Status = gBS->LocateProtocol(
      &gEfiShellProtocolGuid,
      NULL,
      (VOID **)&gEfiShellProtocol
     );
    if (EFI_ERROR(Status)) {
      gEfiShellProtocol = NULL;
    }

Are you running the UEFI Shell and then your application?


-Jaben




> -----Original Message-----
> From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of
> GN Keshava
> Sent: Tuesday, December 20, 2016 11:32 PM
> To: edk2-devel@lists.01.org
> Subject: [edk2] LocateHandle for gEfiShellProtocolGuid is failing in my
> application
> Importance: High
> 
> Hi,
> 
> I'm developing a shell application. A call to LocateHandle for
> gEfiShellProtocolGuid is failing with Status 0x0E.
> 
> Below is my code. Please let me know what I'm doing wrong.
> 
> Status = gBS->LocateHandle(ByProtocol, &gEfiShellProtocolGuid, NULL,
> &BufferSize, Buffer); // Get BufferSize
> if (EFI_ERROR(Status))
> Print(L"LocateHandle Status 0x%x\n",Status);
> 
> Status = gBS->AllocatePool(EfiBootServicesData, BufferSize,
> (void**)&Buffer);
> if (EFI_ERROR(Status))
> Print(L"AllocatePool Status 0x%x\n",Status);
> 
> Status = gBS->LocateHandle(ByProtocol, &gEfiShellProtocolGuid, NULL,
> &BufferSize, Buffer);
> if (EFI_ERROR(Status))
> Print(L"LocateHandle Status 0x%x\n",Status);
> 
> All calls failing with Status being 0x0E. Please help me to solve this. Is
> there any special requirement for using this protocol?
> 
> Thanks.
> Regards,
> Keshava
> _______________________________________________
> edk2-devel mailing list
> edk2-devel@lists.01.org
> https://lists.01.org/mailman/listinfo/edk2-devel

Re: LocateHandle for gEfiShellProtocolGuid is failing in my application

[GN Keshava]

Hi Jaben,

*>> Is there a reason that you are not using ShellLib to facilitate your
app functionality?  That library makes lots of things a lot easier.*

I want to use EFI_SHELL_PROTOCOL->GetMapFromDevicePath in my app. Is there
any way to use it using ShellLib ?


*>> Why do you use LocateHandle and not LocateProtocol?*

Got LocateHandle in my reference. I would like to know more about
difference and usage of these in different scenario.


*>> Are you running the UEFI Shell and then your application?*

Yes. I'm running my application from UEFI shell as :

*fs1:\> MyApp.exe Arg1 Arg2*

Thanks for the help..

Regards,
Keshava


On Thu, 22 Dec 2016 at 00:06 Carsey, Jaben <jaben.carsey@intel.com> wrote:

> Hi Keshava,
>
> few questions:
> Is there a reason that you are not using ShellLib to facilitate your app
> functionality?  That library makes lots of things a lot easier.
> Why do you use LocateHandle and not LocateProtocol?
> Are you sure about that return code?  Usually most-sig-bit is set for
> error returns.
>
> Does the following snippet of code find a valid instance?
>
>     Status = gBS->LocateProtocol(
>       &gEfiShellProtocolGuid,
>       NULL,
>       (VOID **)&gEfiShellProtocol
>      );
>     if (EFI_ERROR(Status)) {
>       gEfiShellProtocol = NULL;
>     }
>
> Are you running the UEFI Shell and then your application?
>
>
> -Jaben
>
>
>
>
> > -----Original Message-----
> > From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of
> > GN Keshava
> > Sent: Tuesday, December 20, 2016 11:32 PM
> > To: edk2-devel@lists.01.org
> > Subject: [edk2] LocateHandle for gEfiShellProtocolGuid is failing in my
> > application
> > Importance: High
> >
> > Hi,
> >
> > I'm developing a shell application. A call to LocateHandle for
> > gEfiShellProtocolGuid is failing with Status 0x0E.
> >
> > Below is my code. Please let me know what I'm doing wrong.
> >
> > Status = gBS->LocateHandle(ByProtocol, &gEfiShellProtocolGuid, NULL,
> > &BufferSize, Buffer); // Get BufferSize
> > if (EFI_ERROR(Status))
> > Print(L"LocateHandle Status 0x%x\n",Status);
> >
> > Status = gBS->AllocatePool(EfiBootServicesData, BufferSize,
> > (void**)&Buffer);
> > if (EFI_ERROR(Status))
> > Print(L"AllocatePool Status 0x%x\n",Status);
> >
> > Status = gBS->LocateHandle(ByProtocol, &gEfiShellProtocolGuid, NULL,
> > &BufferSize, Buffer);
> > if (EFI_ERROR(Status))
> > Print(L"LocateHandle Status 0x%x\n",Status);
> >
> > All calls failing with Status being 0x0E. Please help me to solve this.
> Is
> > there any special requirement for using this protocol?
> >
> > Thanks.
> > Regards,
> > Keshava
> > _______________________________________________
> > edk2-devel mailing list
> > edk2-devel@lists.01.org
> > https://lists.01.org/mailman/listinfo/edk2-devel
>

Re: LocateHandle for gEfiShellProtocolGuid is failing in my application

[GN Keshava]

Hi Jaben and Andrew, Thanks for the replies. Here's a small update.

I tried using *LocateProtocol*, and I get "*Status Not Found*" (%r would
print "Status Not Found").
I'm getting the same error status for *LocateHandle *too. I'm using
*BufferSize=0* and *Buffer=NULL* for getting the BufferSize.
What this would mean? Is there any specific requirement my application
should meet, to use ShellProtocol? Or, as I mentioned in previous mail, I
want to use GetMapFromDevicePath function. Is there any alternate way to do
it?

Thanks for your help.
Regards,
Keshava

On Thu, 22 Dec 2016 at 15:01 GN Keshava <keshava.gn@gmail.com> wrote:

> Hi Jaben,
>
> *>> Is there a reason that you are not using ShellLib to facilitate your
> app functionality?  That library makes lots of things a lot easier.*
>
> I want to use EFI_SHELL_PROTOCOL->GetMapFromDevicePath in my app. Is
> there any way to use it using ShellLib ?
>
>
> *>> Why do you use LocateHandle and not LocateProtocol?*
>
> Got LocateHandle in my reference. I would like to know more about
> difference and usage of these in different scenario.
>
>
> *>> Are you running the UEFI Shell and then your application?*
>
> Yes. I'm running my application from UEFI shell as :
>
> *fs1:\> MyApp.exe Arg1 Arg2*
>
> Thanks for the help..
>
> Regards,
> Keshava
>
>
> On Thu, 22 Dec 2016 at 00:06 Carsey, Jaben <jaben.carsey@intel.com> wrote:
>
> Hi Keshava,
>
> few questions:
> Is there a reason that you are not using ShellLib to facilitate your app
> functionality?  That library makes lots of things a lot easier.
> Why do you use LocateHandle and not LocateProtocol?
> Are you sure about that return code?  Usually most-sig-bit is set for
> error returns.
>
> Does the following snippet of code find a valid instance?
>
>     Status = gBS->LocateProtocol(
>       &gEfiShellProtocolGuid,
>       NULL,
>       (VOID **)&gEfiShellProtocol
>      );
>     if (EFI_ERROR(Status)) {
>       gEfiShellProtocol = NULL;
>     }
>
> Are you running the UEFI Shell and then your application?
>
>
> -Jaben
>
>
>
>
> > -----Original Message-----
> > From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of
> > GN Keshava
> > Sent: Tuesday, December 20, 2016 11:32 PM
> > To: edk2-devel@lists.01.org
> > Subject: [edk2] LocateHandle for gEfiShellProtocolGuid is failing in my
> > application
> > Importance: High
> >
> > Hi,
> >
> > I'm developing a shell application. A call to LocateHandle for
> > gEfiShellProtocolGuid is failing with Status 0x0E.
> >
> > Below is my code. Please let me know what I'm doing wrong.
> >
> > Status = gBS->LocateHandle(ByProtocol, &gEfiShellProtocolGuid, NULL,
> > &BufferSize, Buffer); // Get BufferSize
> > if (EFI_ERROR(Status))
> > Print(L"LocateHandle Status 0x%x\n",Status);
> >
> > Status = gBS->AllocatePool(EfiBootServicesData, BufferSize,
> > (void**)&Buffer);
> > if (EFI_ERROR(Status))
> > Print(L"AllocatePool Status 0x%x\n",Status);
> >
> > Status = gBS->LocateHandle(ByProtocol, &gEfiShellProtocolGuid, NULL,
> > &BufferSize, Buffer);
> > if (EFI_ERROR(Status))
> > Print(L"LocateHandle Status 0x%x\n",Status);
> >
> > All calls failing with Status being 0x0E. Please help me to solve this.
> Is
> > there any special requirement for using this protocol?
> >
> > Thanks.
> > Regards,
> > Keshava
> > _______________________________________________
> > edk2-devel mailing list
> > edk2-devel@lists.01.org
> > https://lists.01.org/mailman/listinfo/edk2-devel
>
>

Re: LocateHandle for gEfiShellProtocolGuid is failing in my application

[Carsey, Jaben]

That function is not in the shell library.

LocateHandle would be useful is you wanted to find the image handle for the shell binary whereas LocaetProtocol would be just getting a pointer to the protocol.

Which version of the UEFI Shell are you using?  (what does “ver” command say)

-Jaben

From: GN Keshava [mailto:keshava.gn@gmail.com]
Sent: Thursday, December 22, 2016 2:07 AM
To: Carsey, Jaben <jaben.carsey@intel.com>; edk2-devel@lists.01.org
Subject: Re: [edk2] LocateHandle for gEfiShellProtocolGuid is failing in my application
Importance: High

Hi Jaben and Andrew, Thanks for the replies. Here's a small update.

I tried using LocateProtocol, and I get "Status Not Found" (%r would print "Status Not Found").
I'm getting the same error status for LocateHandle too. I'm using BufferSize=0 and Buffer=NULL for getting the BufferSize.
What this would mean? Is there any specific requirement my application should meet, to use ShellProtocol? Or, as I mentioned in previous mail, I want to use GetMapFromDevicePath function. Is there any alternate way to do it?

Thanks for your help.
Regards,
Keshava

On Thu, 22 Dec 2016 at 15:01 GN Keshava <keshava.gn@gmail.com<mailto:keshava.gn@gmail.com>> wrote:
Hi Jaben,

>> Is there a reason that you are not using ShellLib to facilitate your app functionality?  That library makes lots of things a lot easier.

I want to use EFI_SHELL_PROTOCOL->GetMapFromDevicePath in my app. Is there any way to use it using ShellLib ?

>> Why do you use LocateHandle and not LocateProtocol?

Got LocateHandle in my reference. I would like to know more about difference and usage of these in different scenario.

>> Are you running the UEFI Shell and then your application?

Yes. I'm running my application from UEFI shell as :

fs1:\> MyApp.exe Arg1 Arg2

Thanks for the help..

Regards,
Keshava

On Thu, 22 Dec 2016 at 00:06 Carsey, Jaben <jaben.carsey@intel.com<mailto:jaben.carsey@intel.com>> wrote:
Hi Keshava,

few questions:
Is there a reason that you are not using ShellLib to facilitate your app functionality?  That library makes lots of things a lot easier.
Why do you use LocateHandle and not LocateProtocol?
Are you sure about that return code?  Usually most-sig-bit is set for error returns.

Does the following snippet of code find a valid instance?

    Status = gBS->LocateProtocol(
      &gEfiShellProtocolGuid,
      NULL,
      (VOID **)&gEfiShellProtocol
     );
    if (EFI_ERROR(Status)) {
      gEfiShellProtocol = NULL;
    }

Are you running the UEFI Shell and then your application?


-Jaben




> -----Original Message-----
> From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org<mailto:edk2-devel-bounces@lists.01.org>] On Behalf Of
> GN Keshava
> Sent: Tuesday, December 20, 2016 11:32 PM
> To: edk2-devel@lists.01.org<mailto:edk2-devel@lists.01.org>
> Subject: [edk2] LocateHandle for gEfiShellProtocolGuid is failing in my
> application
> Importance: High
>
> Hi,
>
> I'm developing a shell application. A call to LocateHandle for
> gEfiShellProtocolGuid is failing with Status 0x0E.
>
> Below is my code. Please let me know what I'm doing wrong.
>
> Status = gBS->LocateHandle(ByProtocol, &gEfiShellProtocolGuid, NULL,
> &BufferSize, Buffer); // Get BufferSize
> if (EFI_ERROR(Status))
> Print(L"LocateHandle Status 0x%x\n",Status);
>
> Status = gBS->AllocatePool(EfiBootServicesData, BufferSize,
> (void**)&Buffer);
> if (EFI_ERROR(Status))
> Print(L"AllocatePool Status 0x%x\n",Status);
>
> Status = gBS->LocateHandle(ByProtocol, &gEfiShellProtocolGuid, NULL,
> &BufferSize, Buffer);
> if (EFI_ERROR(Status))
> Print(L"LocateHandle Status 0x%x\n",Status);
>
> All calls failing with Status being 0x0E. Please help me to solve this. Is
> there any special requirement for using this protocol?
>
> Thanks.
> Regards,
> Keshava
> _______________________________________________
> edk2-devel mailing list
> edk2-devel@lists.01.org<mailto:edk2-devel@lists.01.org>
> https://lists.01.org/mailman/listinfo/edk2-devel

Re: LocateHandle for gEfiShellProtocolGuid is failing in my application

[GN Keshava]

Hi Jaben,

Version is 2.31... Revision is 4.653

Thanks.
Regards,
Keshava

On Thu, 22 Dec 2016 at 22:26 Carsey, Jaben <jaben.carsey@intel.com> wrote:

> That function is not in the shell library.
>
>
>
> LocateHandle would be useful is you wanted to find the image handle for
> the shell binary whereas LocaetProtocol would be just getting a pointer to
> the protocol.
>
>
>
> Which version of the UEFI Shell are you using?  (what does “ver” command
> say)
>
>
>
> -Jaben
>
>
>
> *From:* GN Keshava [mailto:keshava.gn@gmail.com]
> *Sent:* Thursday, December 22, 2016 2:07 AM
> *To:* Carsey, Jaben <jaben.carsey@intel.com>; edk2-devel@lists.01.org
> *Subject:* Re: [edk2] LocateHandle for gEfiShellProtocolGuid is failing
> in my application
> *Importance:* High
>
>
>
> Hi Jaben and Andrew, Thanks for the replies. Here's a small update.
>
>
>
> I tried using *LocateProtocol*, and I get "*Status Not Found*" (%r would
> print "Status Not Found").
>
> I'm getting the same error status for *LocateHandle *too. I'm using
> *BufferSize=0* and *Buffer=NULL* for getting the BufferSize.
>
> What this would mean? Is there any specific requirement my application
> should meet, to use ShellProtocol? Or, as I mentioned in previous mail, I
> want to use GetMapFromDevicePath function. Is there any alternate way to do
> it?
>
>
>
> Thanks for your help.
>
> Regards,
>
> Keshava
>
>
>
> On Thu, 22 Dec 2016 at 15:01 GN Keshava <keshava.gn@gmail.com> wrote:
>
> Hi Jaben,
>
>
>
> *>> Is there a reason that you are not using ShellLib to facilitate your
> app functionality?  That library makes lots of things a lot easier.*
>
>
>
> I want to use EFI_SHELL_PROTOCOL->*GetMapFromDevicePath* in my app. Is
> there any way to use it using ShellLib ?
>
>
>
> *>> Why do you use LocateHandle and not LocateProtocol?*
>
>
>
> Got LocateHandle in my reference. I would like to know more about
> difference and usage of these in different scenario.
>
>
>
> *>> Are you running the UEFI Shell and then your application?*
>
>
>
> Yes. I'm running my application from UEFI shell as :
>
>
>
> *fs1:\> MyApp.exe Arg1 Arg2*
>
>
>
> Thanks for the help..
>
>
>
> Regards,
>
> Keshava
>
>
>
> On Thu, 22 Dec 2016 at 00:06 Carsey, Jaben <jaben.carsey@intel.com> wrote:
>
> Hi Keshava,
>
> few questions:
> Is there a reason that you are not using ShellLib to facilitate your app
> functionality?  That library makes lots of things a lot easier.
> Why do you use LocateHandle and not LocateProtocol?
> Are you sure about that return code?  Usually most-sig-bit is set for
> error returns.
>
> Does the following snippet of code find a valid instance?
>
>     Status = gBS->LocateProtocol(
>       &gEfiShellProtocolGuid,
>       NULL,
>       (VOID **)&gEfiShellProtocol
>      );
>     if (EFI_ERROR(Status)) {
>       gEfiShellProtocol = NULL;
>     }
>
> Are you running the UEFI Shell and then your application?
>
>
> -Jaben
>
>
>
>
> > -----Original Message-----
> > From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of
> > GN Keshava
> > Sent: Tuesday, December 20, 2016 11:32 PM
> > To: edk2-devel@lists.01.org
> > Subject: [edk2] LocateHandle for gEfiShellProtocolGuid is failing in my
> > application
> > Importance: High
> >
> > Hi,
> >
> > I'm developing a shell application. A call to LocateHandle for
> > gEfiShellProtocolGuid is failing with Status 0x0E.
> >
> > Below is my code. Please let me know what I'm doing wrong.
> >
> > Status = gBS->LocateHandle(ByProtocol, &gEfiShellProtocolGuid, NULL,
> > &BufferSize, Buffer); // Get BufferSize
> > if (EFI_ERROR(Status))
> > Print(L"LocateHandle Status 0x%x\n",Status);
> >
> > Status = gBS->AllocatePool(EfiBootServicesData, BufferSize,
> > (void**)&Buffer);
> > if (EFI_ERROR(Status))
> > Print(L"AllocatePool Status 0x%x\n",Status);
> >
> > Status = gBS->LocateHandle(ByProtocol, &gEfiShellProtocolGuid, NULL,
> > &BufferSize, Buffer);
> > if (EFI_ERROR(Status))
> > Print(L"LocateHandle Status 0x%x\n",Status);
> >
> > All calls failing with Status being 0x0E. Please help me to solve this.
> Is
> > there any special requirement for using this protocol?
> >
> > Thanks.
> > Regards,
> > Keshava
> > _______________________________________________
> > edk2-devel mailing list
> > edk2-devel@lists.01.org
> > https://lists.01.org/mailman/listinfo/edk2-devel
>
>

Re: LocateHandle for gEfiShellProtocolGuid is failing in my application

[Carsey, Jaben]

I wonder if the firmware supplier is using an older version of the shell binary?  Maybe it is EDK Shell and not UEFI Shell?  I am unsure how to fix the issue.

-Jaben

> -----Original Message-----
> From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of
> GN Keshava
> Sent: Thursday, December 22, 2016 8:07 PM
> To: Carsey, Jaben <jaben.carsey@intel.com>; edk2-devel@lists.01.org
> Subject: Re: [edk2] LocateHandle for gEfiShellProtocolGuid is failing in my
> application
> Importance: High
> 
> Hi Jaben,
> 
> Version is 2.31... Revision is 4.653
> 
> Thanks.
> Regards,
> Keshava
> 
> On Thu, 22 Dec 2016 at 22:26 Carsey, Jaben <jaben.carsey@intel.com> wrote:
> 
> > That function is not in the shell library.
> >
> >
> >
> > LocateHandle would be useful is you wanted to find the image handle for
> > the shell binary whereas LocaetProtocol would be just getting a pointer to
> > the protocol.
> >
> >
> >
> > Which version of the UEFI Shell are you using?  (what does “ver” command
> > say)
> >
> >
> >
> > -Jaben
> >
> >
> >
> > *From:* GN Keshava [mailto:keshava.gn@gmail.com]
> > *Sent:* Thursday, December 22, 2016 2:07 AM
> > *To:* Carsey, Jaben <jaben.carsey@intel.com>; edk2-devel@lists.01.org
> > *Subject:* Re: [edk2] LocateHandle for gEfiShellProtocolGuid is failing
> > in my application
> > *Importance:* High
> >
> >
> >
> > Hi Jaben and Andrew, Thanks for the replies. Here's a small update.
> >
> >
> >
> > I tried using *LocateProtocol*, and I get "*Status Not Found*" (%r would
> > print "Status Not Found").
> >
> > I'm getting the same error status for *LocateHandle *too. I'm using
> > *BufferSize=0* and *Buffer=NULL* for getting the BufferSize.
> >
> > What this would mean? Is there any specific requirement my application
> > should meet, to use ShellProtocol? Or, as I mentioned in previous mail, I
> > want to use GetMapFromDevicePath function. Is there any alternate way
> to do
> > it?
> >
> >
> >
> > Thanks for your help.
> >
> > Regards,
> >
> > Keshava
> >
> >
> >
> > On Thu, 22 Dec 2016 at 15:01 GN Keshava <keshava.gn@gmail.com> wrote:
> >
> > Hi Jaben,
> >
> >
> >
> > *>> Is there a reason that you are not using ShellLib to facilitate your
> > app functionality?  That library makes lots of things a lot easier.*
> >
> >
> >
> > I want to use EFI_SHELL_PROTOCOL->*GetMapFromDevicePath* in my
> app. Is
> > there any way to use it using ShellLib ?
> >
> >
> >
> > *>> Why do you use LocateHandle and not LocateProtocol?*
> >
> >
> >
> > Got LocateHandle in my reference. I would like to know more about
> > difference and usage of these in different scenario.
> >
> >
> >
> > *>> Are you running the UEFI Shell and then your application?*
> >
> >
> >
> > Yes. I'm running my application from UEFI shell as :
> >
> >
> >
> > *fs1:\> MyApp.exe Arg1 Arg2*
> >
> >
> >
> > Thanks for the help..
> >
> >
> >
> > Regards,
> >
> > Keshava
> >
> >
> >
> > On Thu, 22 Dec 2016 at 00:06 Carsey, Jaben <jaben.carsey@intel.com>
> wrote:
> >
> > Hi Keshava,
> >
> > few questions:
> > Is there a reason that you are not using ShellLib to facilitate your app
> > functionality?  That library makes lots of things a lot easier.
> > Why do you use LocateHandle and not LocateProtocol?
> > Are you sure about that return code?  Usually most-sig-bit is set for
> > error returns.
> >
> > Does the following snippet of code find a valid instance?
> >
> >     Status = gBS->LocateProtocol(
> >       &gEfiShellProtocolGuid,
> >       NULL,
> >       (VOID **)&gEfiShellProtocol
> >      );
> >     if (EFI_ERROR(Status)) {
> >       gEfiShellProtocol = NULL;
> >     }
> >
> > Are you running the UEFI Shell and then your application?
> >
> >
> > -Jaben
> >
> >
> >
> >
> > > -----Original Message-----
> > > From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of
> > > GN Keshava
> > > Sent: Tuesday, December 20, 2016 11:32 PM
> > > To: edk2-devel@lists.01.org
> > > Subject: [edk2] LocateHandle for gEfiShellProtocolGuid is failing in my
> > > application
> > > Importance: High
> > >
> > > Hi,
> > >
> > > I'm developing a shell application. A call to LocateHandle for
> > > gEfiShellProtocolGuid is failing with Status 0x0E.
> > >
> > > Below is my code. Please let me know what I'm doing wrong.
> > >
> > > Status = gBS->LocateHandle(ByProtocol, &gEfiShellProtocolGuid, NULL,
> > > &BufferSize, Buffer); // Get BufferSize
> > > if (EFI_ERROR(Status))
> > > Print(L"LocateHandle Status 0x%x\n",Status);
> > >
> > > Status = gBS->AllocatePool(EfiBootServicesData, BufferSize,
> > > (void**)&Buffer);
> > > if (EFI_ERROR(Status))
> > > Print(L"AllocatePool Status 0x%x\n",Status);
> > >
> > > Status = gBS->LocateHandle(ByProtocol, &gEfiShellProtocolGuid, NULL,
> > > &BufferSize, Buffer);
> > > if (EFI_ERROR(Status))
> > > Print(L"LocateHandle Status 0x%x\n",Status);
> > >
> > > All calls failing with Status being 0x0E. Please help me to solve this.
> > Is
> > > there any special requirement for using this protocol?
> > >
> > > Thanks.
> > > Regards,
> > > Keshava
> > > _______________________________________________
> > > edk2-devel mailing list
> > > edk2-devel@lists.01.org
> > > https://lists.01.org/mailman/listinfo/edk2-devel
> >
> >
> _______________________________________________
> edk2-devel mailing list
> edk2-devel@lists.01.org
> https://lists.01.org/mailman/listinfo/edk2-devel

Re: LocateHandle for gEfiShellProtocolGuid is failing in my application

[GN Keshava]

Thanks a lot for the help, Jaben.

*>>Maybe it is EDK Shell and not UEFI Shell?*
How I can understand if it is EDK shell or UEFI shell?
(I'm using *UEFI x86 Shell *or *MinShell *from efi\MyWorkSpace\ShellBinPkg\
directory). Is it OK to use this?
Is it possible for you to give me an UEFI shell binary for x86 (Intel i5
3470), so that I can try it right away?

*>>I wonder if the firmware supplier is using an older version of the shell
binary?*
For Intel i5 3470, how to check what is the firmware version?

Thanks again.
Regards,
Keshava GN

On Wed, 28 Dec 2016 at 04:58 Carsey, Jaben <jaben.carsey@intel.com> wrote:

> I wonder if the firmware supplier is using an older version of the shell
> binary?  Maybe it is EDK Shell and not UEFI Shell?  I am unsure how to fix
> the issue.
>
> -Jaben
>
> > -----Original Message-----
> > From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of
> > GN Keshava
> > Sent: Thursday, December 22, 2016 8:07 PM
> > To: Carsey, Jaben <jaben.carsey@intel.com>; edk2-devel@lists.01.org
> > Subject: Re: [edk2] LocateHandle for gEfiShellProtocolGuid is failing in
> my
> > application
> > Importance: High
> >
> > Hi Jaben,
> >
> > Version is 2.31... Revision is 4.653
> >
> > Thanks.
> > Regards,
> > Keshava
> >
> > On Thu, 22 Dec 2016 at 22:26 Carsey, Jaben <jaben.carsey@intel.com>
> wrote:
> >
> > > That function is not in the shell library.
> > >
> > >
> > >
> > > LocateHandle would be useful is you wanted to find the image handle for
> > > the shell binary whereas LocaetProtocol would be just getting a
> pointer to
> > > the protocol.
> > >
> > >
> > >
> > > Which version of the UEFI Shell are you using?  (what does “ver”
> command
> > > say)
> > >
> > >
> > >
> > > -Jaben
> > >
> > >
> > >
> > > *From:* GN Keshava [mailto:keshava.gn@gmail.com]
> > > *Sent:* Thursday, December 22, 2016 2:07 AM
> > > *To:* Carsey, Jaben <jaben.carsey@intel.com>; edk2-devel@lists.01.org
> > > *Subject:* Re: [edk2] LocateHandle for gEfiShellProtocolGuid is failing
> > > in my application
> > > *Importance:* High
> > >
> > >
> > >
> > > Hi Jaben and Andrew, Thanks for the replies. Here's a small update.
> > >
> > >
> > >
> > > I tried using *LocateProtocol*, and I get "*Status Not Found*" (%r
> would
> > > print "Status Not Found").
> > >
> > > I'm getting the same error status for *LocateHandle *too. I'm using
> > > *BufferSize=0* and *Buffer=NULL* for getting the BufferSize.
> > >
> > > What this would mean? Is there any specific requirement my application
> > > should meet, to use ShellProtocol? Or, as I mentioned in previous
> mail, I
> > > want to use GetMapFromDevicePath function. Is there any alternate way
> > to do
> > > it?
> > >
> > >
> > >
> > > Thanks for your help.
> > >
> > > Regards,
> > >
> > > Keshava
> > >
> > >
> > >
> > > On Thu, 22 Dec 2016 at 15:01 GN Keshava <keshava.gn@gmail.com> wrote:
> > >
> > > Hi Jaben,
> > >
> > >
> > >
> > > *>> Is there a reason that you are not using ShellLib to facilitate
> your
> > > app functionality?  That library makes lots of things a lot easier.*
> > >
> > >
> > >
> > > I want to use EFI_SHELL_PROTOCOL->*GetMapFromDevicePath* in my
> > app. Is
> > > there any way to use it using ShellLib ?
> > >
> > >
> > >
> > > *>> Why do you use LocateHandle and not LocateProtocol?*
> > >
> > >
> > >
> > > Got LocateHandle in my reference. I would like to know more about
> > > difference and usage of these in different scenario.
> > >
> > >
> > >
> > > *>> Are you running the UEFI Shell and then your application?*
> > >
> > >
> > >
> > > Yes. I'm running my application from UEFI shell as :
> > >
> > >
> > >
> > > *fs1:\> MyApp.exe Arg1 Arg2*
> > >
> > >
> > >
> > > Thanks for the help..
> > >
> > >
> > >
> > > Regards,
> > >
> > > Keshava
> > >
> > >
> > >
> > > On Thu, 22 Dec 2016 at 00:06 Carsey, Jaben <jaben.carsey@intel.com>
> > wrote:
> > >
> > > Hi Keshava,
> > >
> > > few questions:
> > > Is there a reason that you are not using ShellLib to facilitate your
> app
> > > functionality?  That library makes lots of things a lot easier.
> > > Why do you use LocateHandle and not LocateProtocol?
> > > Are you sure about that return code?  Usually most-sig-bit is set for
> > > error returns.
> > >
> > > Does the following snippet of code find a valid instance?
> > >
> > >     Status = gBS->LocateProtocol(
> > >       &gEfiShellProtocolGuid,
> > >       NULL,
> > >       (VOID **)&gEfiShellProtocol
> > >      );
> > >     if (EFI_ERROR(Status)) {
> > >       gEfiShellProtocol = NULL;
> > >     }
> > >
> > > Are you running the UEFI Shell and then your application?
> > >
> > >
> > > -Jaben
> > >
> > >
> > >
> > >
> > > > -----Original Message-----
> > > > From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf
> Of
> > > > GN Keshava
> > > > Sent: Tuesday, December 20, 2016 11:32 PM
> > > > To: edk2-devel@lists.01.org
> > > > Subject: [edk2] LocateHandle for gEfiShellProtocolGuid is failing in
> my
> > > > application
> > > > Importance: High
> > > >
> > > > Hi,
> > > >
> > > > I'm developing a shell application. A call to LocateHandle for
> > > > gEfiShellProtocolGuid is failing with Status 0x0E.
> > > >
> > > > Below is my code. Please let me know what I'm doing wrong.
> > > >
> > > > Status = gBS->LocateHandle(ByProtocol, &gEfiShellProtocolGuid, NULL,
> > > > &BufferSize, Buffer); // Get BufferSize
> > > > if (EFI_ERROR(Status))
> > > > Print(L"LocateHandle Status 0x%x\n",Status);
> > > >
> > > > Status = gBS->AllocatePool(EfiBootServicesData, BufferSize,
> > > > (void**)&Buffer);
> > > > if (EFI_ERROR(Status))
> > > > Print(L"AllocatePool Status 0x%x\n",Status);
> > > >
> > > > Status = gBS->LocateHandle(ByProtocol, &gEfiShellProtocolGuid, NULL,
> > > > &BufferSize, Buffer);
> > > > if (EFI_ERROR(Status))
> > > > Print(L"LocateHandle Status 0x%x\n",Status);
> > > >
> > > > All calls failing with Status being 0x0E. Please help me to solve
> this.
> > > Is
> > > > there any special requirement for using this protocol?
> > > >
> > > > Thanks.
> > > > Regards,
> > > > Keshava
> > > > _______________________________________________
> > > > edk2-devel mailing list
> > > > edk2-devel@lists.01.org
> > > > https://lists.01.org/mailman/listinfo/edk2-devel
> > >
> > >
> > _______________________________________________
> > edk2-devel mailing list
> > edk2-devel@lists.01.org
> > https://lists.01.org/mailman/listinfo/edk2-devel
>

Re: LocateHandle for gEfiShellProtocolGuid is failing in my application

[Carsey, Jaben]

ShellBinPkg should be the right location to get a UEFI Shell from (for the record the EdkShellBinPkg would be the old version).

If you do "ver -s" the ourput will provide additional version information about the shell itself.

Have you updated your git version recently?

-Jaben

> -----Original Message-----
> From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of
> GN Keshava
> Sent: Tuesday, December 27, 2016 8:16 PM
> To: Carsey, Jaben <jaben.carsey@intel.com>; edk2-devel@lists.01.org
> Subject: Re: [edk2] LocateHandle for gEfiShellProtocolGuid is failing in my
> application
> Importance: High
> 
> Thanks a lot for the help, Jaben.
> 
> *>>Maybe it is EDK Shell and not UEFI Shell?*
> How I can understand if it is EDK shell or UEFI shell?
> (I'm using *UEFI x86 Shell *or *MinShell *from
> efi\MyWorkSpace\ShellBinPkg\
> directory). Is it OK to use this?
> Is it possible for you to give me an UEFI shell binary for x86 (Intel i5
> 3470), so that I can try it right away?
> 
> *>>I wonder if the firmware supplier is using an older version of the shell
> binary?*
> For Intel i5 3470, how to check what is the firmware version?
> 
> Thanks again.
> Regards,
> Keshava GN
> 
> On Wed, 28 Dec 2016 at 04:58 Carsey, Jaben <jaben.carsey@intel.com>
> wrote:
> 
> > I wonder if the firmware supplier is using an older version of the shell
> > binary?  Maybe it is EDK Shell and not UEFI Shell?  I am unsure how to fix
> > the issue.
> >
> > -Jaben
> >
> > > -----Original Message-----
> > > From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of
> > > GN Keshava
> > > Sent: Thursday, December 22, 2016 8:07 PM
> > > To: Carsey, Jaben <jaben.carsey@intel.com>; edk2-devel@lists.01.org
> > > Subject: Re: [edk2] LocateHandle for gEfiShellProtocolGuid is failing in
> > my
> > > application
> > > Importance: High
> > >
> > > Hi Jaben,
> > >
> > > Version is 2.31... Revision is 4.653
> > >
> > > Thanks.
> > > Regards,
> > > Keshava
> > >
> > > On Thu, 22 Dec 2016 at 22:26 Carsey, Jaben <jaben.carsey@intel.com>
> > wrote:
> > >
> > > > That function is not in the shell library.
> > > >
> > > >
> > > >
> > > > LocateHandle would be useful is you wanted to find the image handle
> for
> > > > the shell binary whereas LocaetProtocol would be just getting a
> > pointer to
> > > > the protocol.
> > > >
> > > >
> > > >
> > > > Which version of the UEFI Shell are you using?  (what does “ver”
> > command
> > > > say)
> > > >
> > > >
> > > >
> > > > -Jaben
> > > >
> > > >
> > > >
> > > > *From:* GN Keshava [mailto:keshava.gn@gmail.com]
> > > > *Sent:* Thursday, December 22, 2016 2:07 AM
> > > > *To:* Carsey, Jaben <jaben.carsey@intel.com>; edk2-
> devel@lists.01.org
> > > > *Subject:* Re: [edk2] LocateHandle for gEfiShellProtocolGuid is failing
> > > > in my application
> > > > *Importance:* High
> > > >
> > > >
> > > >
> > > > Hi Jaben and Andrew, Thanks for the replies. Here's a small update.
> > > >
> > > >
> > > >
> > > > I tried using *LocateProtocol*, and I get "*Status Not Found*" (%r
> > would
> > > > print "Status Not Found").
> > > >
> > > > I'm getting the same error status for *LocateHandle *too. I'm using
> > > > *BufferSize=0* and *Buffer=NULL* for getting the BufferSize.
> > > >
> > > > What this would mean? Is there any specific requirement my
> application
> > > > should meet, to use ShellProtocol? Or, as I mentioned in previous
> > mail, I
> > > > want to use GetMapFromDevicePath function. Is there any alternate
> way
> > > to do
> > > > it?
> > > >
> > > >
> > > >
> > > > Thanks for your help.
> > > >
> > > > Regards,
> > > >
> > > > Keshava
> > > >
> > > >
> > > >
> > > > On Thu, 22 Dec 2016 at 15:01 GN Keshava <keshava.gn@gmail.com>
> wrote:
> > > >
> > > > Hi Jaben,
> > > >
> > > >
> > > >
> > > > *>> Is there a reason that you are not using ShellLib to facilitate
> > your
> > > > app functionality?  That library makes lots of things a lot easier.*
> > > >
> > > >
> > > >
> > > > I want to use EFI_SHELL_PROTOCOL->*GetMapFromDevicePath* in my
> > > app. Is
> > > > there any way to use it using ShellLib ?
> > > >
> > > >
> > > >
> > > > *>> Why do you use LocateHandle and not LocateProtocol?*
> > > >
> > > >
> > > >
> > > > Got LocateHandle in my reference. I would like to know more about
> > > > difference and usage of these in different scenario.
> > > >
> > > >
> > > >
> > > > *>> Are you running the UEFI Shell and then your application?*
> > > >
> > > >
> > > >
> > > > Yes. I'm running my application from UEFI shell as :
> > > >
> > > >
> > > >
> > > > *fs1:\> MyApp.exe Arg1 Arg2*
> > > >
> > > >
> > > >
> > > > Thanks for the help..
> > > >
> > > >
> > > >
> > > > Regards,
> > > >
> > > > Keshava
> > > >
> > > >
> > > >
> > > > On Thu, 22 Dec 2016 at 00:06 Carsey, Jaben <jaben.carsey@intel.com>
> > > wrote:
> > > >
> > > > Hi Keshava,
> > > >
> > > > few questions:
> > > > Is there a reason that you are not using ShellLib to facilitate your
> > app
> > > > functionality?  That library makes lots of things a lot easier.
> > > > Why do you use LocateHandle and not LocateProtocol?
> > > > Are you sure about that return code?  Usually most-sig-bit is set for
> > > > error returns.
> > > >
> > > > Does the following snippet of code find a valid instance?
> > > >
> > > >     Status = gBS->LocateProtocol(
> > > >       &gEfiShellProtocolGuid,
> > > >       NULL,
> > > >       (VOID **)&gEfiShellProtocol
> > > >      );
> > > >     if (EFI_ERROR(Status)) {
> > > >       gEfiShellProtocol = NULL;
> > > >     }
> > > >
> > > > Are you running the UEFI Shell and then your application?
> > > >
> > > >
> > > > -Jaben
> > > >
> > > >
> > > >
> > > >
> > > > > -----Original Message-----
> > > > > From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On
> Behalf
> > Of
> > > > > GN Keshava
> > > > > Sent: Tuesday, December 20, 2016 11:32 PM
> > > > > To: edk2-devel@lists.01.org
> > > > > Subject: [edk2] LocateHandle for gEfiShellProtocolGuid is failing in
> > my
> > > > > application
> > > > > Importance: High
> > > > >
> > > > > Hi,
> > > > >
> > > > > I'm developing a shell application. A call to LocateHandle for
> > > > > gEfiShellProtocolGuid is failing with Status 0x0E.
> > > > >
> > > > > Below is my code. Please let me know what I'm doing wrong.
> > > > >
> > > > > Status = gBS->LocateHandle(ByProtocol, &gEfiShellProtocolGuid,
> NULL,
> > > > > &BufferSize, Buffer); // Get BufferSize
> > > > > if (EFI_ERROR(Status))
> > > > > Print(L"LocateHandle Status 0x%x\n",Status);
> > > > >
> > > > > Status = gBS->AllocatePool(EfiBootServicesData, BufferSize,
> > > > > (void**)&Buffer);
> > > > > if (EFI_ERROR(Status))
> > > > > Print(L"AllocatePool Status 0x%x\n",Status);
> > > > >
> > > > > Status = gBS->LocateHandle(ByProtocol, &gEfiShellProtocolGuid,
> NULL,
> > > > > &BufferSize, Buffer);
> > > > > if (EFI_ERROR(Status))
> > > > > Print(L"LocateHandle Status 0x%x\n",Status);
> > > > >
> > > > > All calls failing with Status being 0x0E. Please help me to solve
> > this.
> > > > Is
> > > > > there any special requirement for using this protocol?
> > > > >
> > > > > Thanks.
> > > > > Regards,
> > > > > Keshava
> > > > > _______________________________________________
> > > > > edk2-devel mailing list
> > > > > edk2-devel@lists.01.org
> > > > > https://lists.01.org/mailman/listinfo/edk2-devel
> > > >
> > > >
> > > _______________________________________________
> > > edk2-devel mailing list
> > > edk2-devel@lists.01.org
> > > https://lists.01.org/mailman/listinfo/edk2-devel
> >
> _______________________________________________
> edk2-devel mailing list
> edk2-devel@lists.01.org
> https://lists.01.org/mailman/listinfo/edk2-devel

Re: LocateHandle for gEfiShellProtocolGuid is failing in my application

[Andrew Fish]

> On Dec 20, 2016, at 11:32 PM, GN Keshava <keshava.gn@gmail.com> wrote:
> 
> Hi,
> 
> I'm developing a shell application. A call to LocateHandle for
> gEfiShellProtocolGuid is failing with Status 0x0E.
> 
> Below is my code. Please let me know what I'm doing wrong.
> 
> Status = gBS->LocateHandle(ByProtocol, &gEfiShellProtocolGuid, NULL,
> &BufferSize, Buffer); // Get BufferSize
> if (EFI_ERROR(Status))
> Print(L"LocateHandle Status 0x%x\n",Status);
> 

You can use %r with Print() to decode the error. 

https://github.com/tianocore/edk2/blob/master/MdePkg/Include/Library/PrintLib.h <https://github.com/tianocore/edk2/blob/master/MdePkg/Include/Library/PrintLib.h>
    - r
      - The argument is a RETURN_STATUS value.  This value is converted to 
        a string following the table below.  This does not follow ANSI C. 
      - RETURN_SUCCESS               
        - "Success"
      - RETURN_LOAD_ERROR            
        - "Load Error"
      - RETURN_INVALID_PARAMETER     
        - "Invalid Parameter"
      - RETURN_UNSUPPORTED           
        - "Unsupported"
      - RETURN_BAD_BUFFER_SIZE       
        - "Bad Buffer Size"
      - RETURN_BUFFER_TOO_SMALL      
        - "Buffer Too Small"
      - RETURN_NOT_READY             
        - "Not Ready"



Thanks,

Andrew Fish


> Status = gBS->AllocatePool(EfiBootServicesData, BufferSize,
> (void**)&Buffer);
> if (EFI_ERROR(Status))
> Print(L"AllocatePool Status 0x%x\n",Status);
> 
> Status = gBS->LocateHandle(ByProtocol, &gEfiShellProtocolGuid, NULL,
> &BufferSize, Buffer);
> if (EFI_ERROR(Status))
> Print(L"LocateHandle Status 0x%x\n",Status);
> 
> All calls failing with Status being 0x0E. Please help me to solve this. Is
> there any special requirement for using this protocol?
> 
> Thanks.
> Regards,
> Keshava
> _______________________________________________
> edk2-devel mailing list
> edk2-devel@lists.01.org
> https://lists.01.org/mailman/listinfo/edk2-devel

Re: LocateHandle for gEfiShellProtocolGuid is failing in my application

[Andrew Fish]

> On Dec 20, 2016, at 11:32 PM, GN Keshava <keshava.gn@gmail.com> wrote:
> 
> Hi,
> 
> I'm developing a shell application. A call to LocateHandle for
> gEfiShellProtocolGuid is failing with Status 0x0E.
> 
> Below is my code. Please let me know what I'm doing wrong.
> 

Assuming this is your entire code fragment you are passing 2 uninitialized values 

If you want to probe the size you need to:
BufferSize = 0;

> Status = gBS->LocateHandle(ByProtocol, &gEfiShellProtocolGuid, NULL,
> &BufferSize, Buffer); // Get BufferSize
> if (EFI_ERROR(Status))

Per the spec you would expect to get Status = EFI_BUFFER_TOO_SMALL if you need to grow the size. You should only allocate the buffer and retry if you get EFI_BUFFER_TOO_SMALL. 

You don't handle the case of  EFI_NOT_FOUND.

FYI the error codes are defined in the UEFI Spec and exist here in the code:
https://github.com/tianocore/edk2/blob/master/MdePkg/Include/Base.h <https://github.com/tianocore/edk2/blob/master/MdePkg/Include/Base.h>



///
/// The buffer was not large enough to hold the requested data.
/// The required buffer size is returned in the appropriate
/// parameter when this error occurs.
///
#define RETURN_BUFFER_TOO_SMALL      ENCODE_ERROR (5)


...

///
/// The item was not found.
///
#define RETURN_NOT_FOUND             ENCODE_ERROR (14)


#define ENCODE_ERROR(StatusCode)     ((RETURN_STATUS)(MAX_BIT | (StatusCode)))


MAX_BIT is going to be defined as BIT63 or BIT31 depending on the CPU architecture you are using. 


> Print(L"LocateHandle Status 0x%x\n",Status);
> 
> Status = gBS->AllocatePool(EfiBootServicesData, BufferSize,
> (void**)&Buffer);
> if (EFI_ERROR(Status))
> Print(L"AllocatePool Status 0x%x\n",Status);
> 

I mentioned in the other mail that you can use %r to get a string for the error.

Thanks,

Andrew Fish


> Status = gBS->LocateHandle(ByProtocol, &gEfiShellProtocolGuid, NULL,
> &BufferSize, Buffer);
> if (EFI_ERROR(Status))
> Print(L"LocateHandle Status 0x%x\n",Status);
> 
> All calls failing with Status being 0x0E. Please help me to solve this. Is
> there any special requirement for using this protocol?
> 
> Thanks.
> Regards,
> Keshava
> ___________________________________

Re: LocateHandle for gEfiShellProtocolGuid is failing in my application

[GN Keshava]

Thanks a lot, Andrew and Jaben.
I will check these and get back...

Thanks again. :)

Regards,
Keshava

On ಗುರು, ಡಿಸೆಂ 22, 2016 12:43 ಪೂರ್ವಾಹ್ನ Andrew Fish <afish@apple.com> wrote:

> On Dec 20, 2016, at 11:32 PM, GN Keshava <keshava.gn@gmail.com> wrote:
>
> Hi,
>
> I'm developing a shell application. A call to LocateHandle for
> gEfiShellProtocolGuid is failing with Status 0x0E.
>
> Below is my code. Please let me know what I'm doing wrong.
>
>
> Assuming this is your entire code fragment you are passing 2 uninitialized
> values
>
> If you want to probe the size you need to:
> BufferSize = 0;
>
> Status = gBS->LocateHandle(ByProtocol, &gEfiShellProtocolGuid, NULL,
> &BufferSize, Buffer); // Get BufferSize
> if (EFI_ERROR(Status))
>
>
> Per the spec you would expect to get Status = EFI_BUFFER_TOO_SMALL if you
> need to grow the size. You should only allocate the buffer and retry if you
> get EFI_BUFFER_TOO_SMALL.
>
> You don't handle the case of  EFI_NOT_FOUND.
>
> FYI the error codes are defined in the UEFI Spec and exist here in the
> code:
> https://github.com/tianocore/edk2/blob/master/MdePkg/Include/Base.h
>
>
> ///
> /// The buffer was not large enough to hold the requested data.
> /// The required buffer size is returned in the appropriate
> /// parameter when this error occurs.
> ///
> #define RETURN_BUFFER_TOO_SMALL ENCODE_ERROR (5)
>
>
> ...
>
> ///
> /// The item was not found.
> ///
> #define RETURN_NOT_FOUND ENCODE_ERROR (14)
>
>
> #define ENCODE_ERROR(StatusCode) ((RETURN_STATUS)(MAX_BIT | (StatusCode)))
>
>
> MAX_BIT is going to be defined as BIT63 or BIT31 depending on the CPU
> architecture you are using.
>
>
> Print(L"LocateHandle Status 0x%x\n",Status);
>
> Status = gBS->AllocatePool(EfiBootServicesData, BufferSize,
> (void**)&Buffer);
> if (EFI_ERROR(Status))
> Print(L"AllocatePool Status 0x%x\n",Status);
>
>
> I mentioned in the other mail that you can use %r to get a string for the
> error.
>
> Thanks,
>
> Andrew Fish
>
>
> Status = gBS->LocateHandle(ByProtocol, &gEfiShellProtocolGuid, NULL,
> &BufferSize, Buffer);
> if (EFI_ERROR(Status))
> Print(L"LocateHandle Status 0x%x\n",Status);
>
> All calls failing with Status being 0x0E. Please help me to solve this. Is
> there any special requirement for using this protocol?
>
> Thanks.
> Regards,
> Keshava
>
> ___________________________________
>
>
>