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From: Andrew Fish <afish@apple.com>
To: Laszlo Ersek <lersek@redhat.com>
Cc: Saqib Khan <saqib.khan2011@gmail.com>, edk2-devel@ml01.01.org
Subject: Re: How to get BBS_BBS_DEVICE_PATH from BOOTXXXX variable
Date: Tue, 18 Oct 2016 11:37:38 -0700	[thread overview]
Message-ID: <3F7BA679-11EF-4067-92D7-CC58777CB6DC@apple.com> (raw)
In-Reply-To: <4e344fbc-5d83-c963-2867-461d40832c8d@redhat.com>


> On Oct 18, 2016, at 10:40 AM, Laszlo Ersek <lersek@redhat.com> wrote:
> 
> On 10/18/16 19:18, Saqib Khan wrote:
>> Hi,
>> I can not find structure of BOOTXXXX variable, Can any one help how to
>> extract device path from BOOTXXXX variable.
> 
> In UEFI-related questions, the UEFI specification has a fair chance to
> provide useful information.
> 
> Please refer to "3.1.3 Load Options" in the UEFI v2.6 spec, available
> for download from <http://www.uefi.org/specifications>.
> 
> Locating the matching structure definition in the edk2 tree is left as
> an exercise to the reader ;)
> 

Chapter 3 Boot Manager. 

The structure is EFI_LOAD_OPTION but some of the fields are variable length so you have to do math to figure stuff out. 

Thanks,

Andrew Fish


> Laszlo
> 
> _______________________________________________
> edk2-devel mailing list
> edk2-devel@lists.01.org
> https://lists.01.org/mailman/listinfo/edk2-devel



  reply	other threads:[~2016-10-18 18:37 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-10-18 17:18 How to get BBS_BBS_DEVICE_PATH from BOOTXXXX variable Saqib Khan
2016-10-18 17:40 ` Laszlo Ersek
2016-10-18 18:37   ` Andrew Fish [this message]
2016-10-19 18:17     ` Saqib Khan
2016-10-19 20:41       ` Carsey, Jaben
2016-10-20  7:29         ` Saqib Khan
2016-10-20 15:44           ` Carsey, Jaben

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