This is a GPLv3+ implementation of standalone EFI File System drivers, based on the GRUB 2.0 read-only drivers.
For additional info as well as precompiled drivers, see http://efi.akeo.ie
- Visual Studio 2015 or MinGW/gcc
- A git client able to initialize/update submodules
- QEMU if debugging with Visual Studio
- [Common] Fetch the git submodules with
git submodule init
andgit submodule update
. - [Visual Studio] Apply the included patches to the
grub\
subdirectory. If you are using Clang/C2 you can apply the first patch only. If you are using MSVC, then you must apply both patches. - [Visual Studio] Open the solution file and hit
F5
to compile and debug the default driver. - [gcc] Run
make
in the top directory. If needed you can also issue something likemake ARCH=<arch> CROSS_COMPILE=<tuple>
where<arch>
is one ofia32
,x64
orarm
and tuple is the one for your cross-compiler (e.g.arm-linux-gnueabihf-
).
If QEMU is installed, the Visual Studio solution will set up and test the drivers using QEMU
(by also downloading a sample image for each target file system).
Note however that VS debugging expects a 64-bit version of QEMU to be installed in
C:\Program Files\qemu\
(which you can download here).
If that is not the case, you should edit .msvc\debug.vbs
accordingly.
For testing outside of Visual Studio, make sure you have at least one disk with a target
partition using the target filesystem, that is not being handled by other EFI filesystem
drivers.
Then boot into the EFI shell and run the following:
load fs0:\<fs_name>_<arch>.efi
or wherever your driver was copiedmap -r
this should make a newfs#
available, egfs2:
- You should now be able to navigate and access content (in read-only mode)
- For logging output, set the
FS_LOGGING
shell variable to 1 or more - To unload use the
drivers
command, thenunload
with the driver ID
To enable ARM compilation in Visual Studio 2015, you must perform the following:
- Make sure Visual Studio is fully closed.
- Navigate to
C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V140\Platforms\ARM
and remove the read-only attribute onPlatform.Common.props
. - With a text editor running with Administrative privileges open:
C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V140\Platforms\ARM\Platform.Common.props
. - Under the
<PropertyGroup>
section add the following:
<WindowsSDKDesktopARMSupport>true</WindowsSDKDesktopARMSupport>
##Notes
This is a pure GPLv3+ implementation of EFI drivers. Great care was taken
not to use non GPLv3 compatible sources, such as rEFInd's fsw_efi
(GPLv2 only)
or Intel's FAT driver (requires an extra copyright notice).