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A long name is split over multiple directory entries. When deleting a file
with a long name we need the first directory entry to be able to delete the
whole chain.
Add the necessary fields to the FAT iterator:
* cluster of first directory entry
* address of first directory entry
* remaining entries in cluster
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
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When deleting a directory entry 0xe5 is written to name[0].
We have a constant for this value and should use it consistently.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
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Searching for a file is not a write operation. So it should not lead to the
allocation of a new cluster to the directory.
If we reuse deleted entries, we might not even use the new cluster and due
to not flushing it the directory could be corrupted.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
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When creating new directory entries try to reuse entries marked as deleted.
In fill_dir_slot() do not allocate new clusters as this has already been
done in fat_find_empty_dentries().
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
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Provide a function to find a series of empty directory entries.
The current directory is scanned for deleted entries.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
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When handling long file names directory entries may be split over multiple
clusters. We must make sure that new clusters are zero filled on disk.
When allocating a new cluster for a directory flush it.
The flushing should be executed before updating the FAT. This way if
flushing fails, we still have a valid directory structure.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
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When iterating over a child directory we set itr->start_clust.
Do the same when over the root directory.
When looking for deleted directory entries or existing short names we will
have to iterate over directories a second and third time. With this patch
we do not need any special logic for the root directory.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
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For reusing deleted directory entries we have to adjust the function called
to step to the next directory entry.
This patch alone is not enough to actually reuse deleted directory entries
as the fill_dir_slot() is still called with first never used directory
entry.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
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File names must be unique within their directory. So before assigning a
short name we must check that it is unique.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
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In set_name() we select the short name. Once this is correctly implemented
this will be a performance intensive operation because we need to check
that the name does not exist yet. So set_name should only be called once.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
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Currently we pass the short name via the directory iterator.
Pass it explicitly as a parameter.
This removes the requirement to set the short name in the iterator before
writing the long name.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
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The current function set_name() used to create short names has the
following deficiencies resolved by this patch:
* Long names (e.g. FOO.TXT) are stored even if a short name is enough.
* Short names with spaces are created, e.g. "A ~1.TXT".
* Short names with illegal characters are created, e.g. "FOO++BAR".
* Debug output does not not consider that the short file name has no
concluding '\0'.
The solution for the following bug is split of into a separate patch:
* Short file names must be unique.
This patch only provides the loop over possible short file names.
Fixes: c30a15e590c ("FAT: Add FAT write feature")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
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Rename function next_cluster() to fat_next_cluster() and export it.
When creating a new directory entries we should reuse deleted entries.
This requires re-scanning the directory.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
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The FAT specification [1] requires that for a '..' directory entry pointing
to the root directory the fields DIR_FstClusHi and DIR_FstClusLo are 0.
[1] Microsoft FAT Specification, Microsoft Corporation, August 30 2005
Fixes: 31a18d570d96 ("fs: fat: support mkdir")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
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Fit images were loaded to a buffer provided by spl_get_load_buffer().
This may work when the FIT image is small and fits between the start
of DRAM and SYS_TEXT_BASE.
One problem with this approach is that the location of the buffer may
be manipulated by changing the 'size' field of the FIT. A maliciously
crafted FIT image could place the buffer over executable code and be
able to take control of SPL. This is unacceptable for secure boot of
signed FIT images.
Another problem is with larger FIT images, usually containing one or
more linux kernels. In such cases the buffer be be large enough so as
to start before DRAM (Figure I). Trying to load an image in this case
has undefined behavior.
For example, on stm32mp1, the MMC controller hits a RX overrun error,
and aborts loading.
_________________
| FIT Image |
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/===================\ /=====================\
|| DRAM || | DRAM |
|| || | |
||_________________|| SYS_TEXT_BASE | ___________________ |
| | || FIT Image ||
| | || ||
| _________________ | SYS_SPL_MALLOC_START || _________________ ||
|| malloc() data || ||| malloc() data |||
||_________________|| |||_________________|||
| | ||___________________||
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Figure I Figure II
One possibility that was analyzed was to remove the negative offset,
such that the buffer starts at SYS_TEXT_BASE. This is not a proper
solution because on a number of platforms, the malloc buffer() is
placed at a fixed address, usually after SYS_TEXT_BASE. A large
enough FIT image could cause the malloc()'d data to be overwritten
(Figure II) when loading.
/======================\
| DRAM |
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| | CONFIG_SYS_TEXT_BASE
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| ____________________ | CONFIG_SYS_SPL_MALLOC_START
|| malloc() data ||
|| ||
|| __________________ ||
||| FIT Image |||
||| |||
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Figure III
The solution proposed here is to replace the ad-hoc heuristics of
spl_get_load_buffer() with malloc(). This provides two advantages:
* Bounds checking of the buffer region
* Guarantees the buffer does not conflict with other memory
The first problem is solved by constraining the buffer such that it
will not overlap currently executing code. This eliminates the chance
of a malicious FIT being able to replace the executing SPL code prior
to signature checking.
The second problem is solved in conjunction with increasing
CONFIG_SYS_SPL_MALLOC_SIZE. Since the SPL malloc() region is
carefully crafted on a per-platform basis, the chances of memory
conflicts are virtually eliminated.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
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- Series to improve "bootm" by allowing variable evaluation within the
cmdline we would be passing. This will help with Chrome OS but can be
useful elsewhere.
- Improve ATF (TF-A) support within SPL.
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In some cases it is necessary to pass parameters to Linux so that it will
boot correctly. For example, the rootdev parameter is often used to
specify the root device. However the root device may change depending on
whence U-Boot loads the kernel. At present it is necessary to build up
the command line by adding device strings to it one by one.
It is often more convenient to provide a template for bootargs, with
U-Boot doing the substitution from other environment variables.
Add a way to substitute strings in the bootargs variable. This allows
things like "rootdev=${rootdev}" to be used in bootargs, with the
${rootdev} substitution providing the UUID of the root device.
For example, to substitute the GUID of the kernel partition:
setenv bootargs "console=/dev/ttyS0 rootdev=${uuid}/PARTNROFF=1
kern_guid=${uuid}"
part uuid mmc 2:2 uuid
bootm
This is particularly useful when the command line from another place. For
example, Chrome OS stores the command line next to the kernel itself. It
depends on the kernel version being used as well as the hardware features,
so it is extremely difficult to devise a U-Boot script that works on all
boards and kernel versions. With this feature, the command line can be
read from disk and used directly, with a few substitutions set up.
Signed-off-by: Simon Glass <sjg@chromium.org>
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At present cli_simple_process_macros() requires that the caller provide
an output buffer that is exactly CONFIG_SYS_CBSIZE bytes in length. This
makes sense since it is designed to be used from the command line. But we
also want to use it for bootargs substitution.
Update the function to allow the caller to specify the buffer size. Also
return an error if the buffer is exhausted. The caller can ignore that if
preferred.
Signed-off-by: Simon Glass <sjg@chromium.org>
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At present zimage does its own command-line processing and does not
support the 'silent console' feature. There doesn't seem to be any good
reason for this.
Add support for silent console to zimage.
Signed-off-by: Simon Glass <sjg@chromium.org>
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At present we only support updating the 'bootargs' environment
variable. Add another function to update a buffer instead. This will
allow zimage to use this feature.
Also add a lot more tests to cover various cases.
Signed-off-by: Simon Glass <sjg@chromium.org>
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At present only one transformation is supported: making the Linux console
silent. To prepare for adding more, convert the boolean parameter into a
flag value.
Signed-off-by: Simon Glass <sjg@chromium.org>
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At present bootm_process_cmdline_env() reads the 'bootargs' variable and
then writes it back afterwards. This is painful for tests, which would
rather use a simple buffer.
It is also useful for zimage to use a buffer, since it does not actually
put the Linux command line in the bootargs variable.
Refactor the existing code into two pieces. One handles reading and
writing the environment variable, as well as allocating a buffer for use
by the rest of the code, which now operates on a buffer.
Signed-off-by: Simon Glass <sjg@chromium.org>
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Use the size (including terminator) for in this function, rather than
the length. This is arguably easier to follow, with the coming
refactor.
Signed-off-by: Simon Glass <sjg@chromium.org>
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This function will soon do more than just handle the 'silent linux'
feature. As a first step, update it to take a boolean parameter,
indicating whether or not the processing is required.
Signed-off-by: Simon Glass <sjg@chromium.org>
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We want to add more processing to this function. Before doing so, rename
it to bootm_process_cmdline_env(), which is more generic.
Signed-off-by: Simon Glass <sjg@chromium.org>
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At present this function fails silently on error. Update it to produce
an error code. Report this error to the user and abort the boot, since it
likely will prevent a successful start.
No tests are added at this stage, since additional refactoring is taking
place in subsequent patches.
Signed-off-by: Simon Glass <sjg@chromium.org>
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This function currently has no tests. Export it so that we can implement
a simple test on sandbox. Use IS_ENABLED() to remove the unused code,
instead #ifdef.
Signed-off-by: Simon Glass <sjg@chromium.org>
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At present this function returns 1 on success and 0 on failure. But in
the latter case it provides no indication of what went wrong.
If an attempt is made to delete a non-existent variable, the caller may
want to ignore this error. This happens when setting a non-existent
variable to "", for example.
Update the function to return 0 on success and a useful error code on
failure. Add a function comment too.
Make sure that env_set() does not return an error if it is deleting a
variable that doesn't exist. We could update env_set() to return useful
error numbers also, but that is beyond the scope of this change.
Signed-off-by: Simon Glass <sjg@chromium.org>
wip
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Add support to load the OP-TEE Trusted OS by the SPL.
Signed-off-by: Michael Walle <michael@walle.cc>
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Add support to load the bl31 part of the ARM Trusted Firmware by the
SPL.
Signed-off-by: Michael Walle <michael@walle.cc>
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It is not needed. Remove it.
Signed-off-by: Michael Walle <michael@walle.cc>
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The BL31 expects the GIC to be uninitialized. Thus, if we are loading
the BL31 by the SPL we must not initialize it. If u-boot is loaded by
the SPL directly, it will initialize the GIC again (in the same
lowlevel_init()).
This was tested on a custom board with SPL loading the BL31 and jumping
to u-boot as BL33 as well as loading u-boot directly by the SPL. In case
the ATF BL1/BL2 is used, this patch won't change anything, because no
SPL is used at all.
Signed-off-by: Michael Walle <michael@walle.cc>
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Newer platforms use the LOAD_IMAGE_V2 parameter passing method. Add
support for it.
Signed-off-by: Michael Walle <michael@walle.cc>
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bl2_to_bl31_params_mem is just an implementation detail of the SPL ATF
support and is not needed anywhere else. Move it from the header to the
actual module.
Signed-off-by: Michael Walle <michael@walle.cc>
Acked-by: Michal Simek <michal.simek@xilinx.com>
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Move the actual implementation of the bl2_plat_get_bl31_params() to its
own function. The weak function will just call the default
implementation. This has the advantage that board code can still call
the original implementation if it just want to modify minor things.
Signed-off-by: Michael Walle <michael@walle.cc>
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There is no need to have the storage available globally. This is also a
preparation for LOAD_IMAGE_V2 support. That will introduce a similar
generator function which also has its own storage.
Signed-off-by: Michael Walle <michael@walle.cc>
Acked-by: Michal Simek <michal.simek@xilinx.com>
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There is SPL_ARMV8_SEC_FIRMWARE_SUPPORT and ARMV8_SEC_FIRMWARE_SUPPORT.
Thus use CONFIG_IS_ENABLED() instead of the simple #ifdef.
Signed-off-by: Michael Walle <michael@walle.cc>
Acked-by: Michal Simek <michal.simek@xilinx.com>
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into next
Pull request for UEFI sub-system for next
This pull request adds:
* eventlog support for TCG2_PROTOCOL
* UEFI capusule updates
It replace printf by log in efi_uclass.c
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Add more configuration options to allow for efi capsule update
on sandbox.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
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The test can run on sandbox build and it attempts to execute a firmware
update via a capsule-on-disk, using a raw image capsule,
CONFIG_EFI_CAPSULE_RAW.
To run this test successfully, you need configure U-Boot specifically;
See test_capsule_firmware.py for requirements, and hence it won't run
on Travis CI, at least, for now.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
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The test can run on sandbox build and it attempts to execute a firmware
update via a capsule-on-disk, using a FIT image capsule,
CONFIG_EFI_CAPSULE_FIT.
To run this test successfully, you need configure U-Boot specifically;
See test_capsule_firmware.py for requirements, and hence it won't run
on Travis CI, at least, for now.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
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This is a utility mainly for test purpose.
mkeficapsule -f: create a test capsule file for FIT image firmware
Having said that, you will be able to customize the code to fit
your specific requirements for your platform.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
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"efidebug capsule" is more or less a debugging utility.
efidebug capsule update: invoke UpdateCapsule against data on memory
efidebug capsule show: show a capsule header
efidebug capsule result: dump a capsule result variable
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
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In this commit, a very simple firmware management protocol driver
is implemented. It will take a binary image in a capsule file and
apply the data using dfu backend storage drivers via dfu_write_by_alt()
interface.
So "dfu_alt_info" variable should be properly set to specify a device
and location to be updated. Please read README.dfu.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
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In this commit, a very simple firmware management protocol driver
is implemented. It will take a common FIT image firmware in a capsule
file and apply the data using dfu backend storage drivers via
update_fit() interface.
So "dfu_alt_info" variable should be properly set to specify a device
and location to be updated. Please read README.dfu.
Fit image is a common file format for firmware update on U-Boot, and
this protocol works neatly just as a wrapper for one.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
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A capsule tagged with the guid, EFI_FIRMWARE_MANAGEMENT_CAPSULE_ID_GUID,
is handled as a firmware update object.
What efi_update_capsule() basically does is to load any firmware management
protocol (or fmp) drivers contained in a capsule, find out an appropriate
fmp driver and then invoke its set_image() interface against each binary
in a capsule.
In this commit, however, loading drivers is not supported.
The result of applying a capsule is set to be stored in "CapsuleXXXX"
variable, but its implementation is deferred to a fmp driver.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
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Memory range capsule gives us a way to notify that some memory regions
should be left untouched across the next reset.
See UEFI specification, section 8.5.3.
Since how we should handle this kind of capsule is totally up to
the system, no implementation will be added in this commit.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
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Capsule data can be loaded into the system either via UpdateCapsule
runtime service or files on a file system (of boot device).
The latter case is called "capsules on disk", and actual updates will
take place at the next boot time.
In this commit, we will support capsule on disk mechanism.
Please note that U-Boot itself has no notion of "boot device" and
all the capsule files to be executed will be detected only if they
are located in a specific directory, \EFI\UpdateCapsule, on a device
that is identified as a boot device by "BootXXXX" variables.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
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In this commit, skeleton functions for capsule-related API's are
added under CONFIG_EFI_UPDATE_CAPSULE configuration.
Detailed implementation for a specific capsule type will be added
in the succeeding patches.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
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Since update_flash() is used only in update_tftp(), it should be
guarded with appropriate config options.
After the commit 3149e524fc1e, common/update.c will be built under
either CONFIG_UDATE_TFTP, CONFIG_DFU_TFTP or CONFIG_UPDATE_FIT.
Since CONFIG_UPDATE_FIT, hence fit_update(), doesn't rely on
update_flash(), the compiler may cause an "unused" warning if
CONFIG_UPDATE_FIT=y and CONFIG_UPDATE_TFTP=n and CONFIG_DFU_TFTP=n.
This is, for example, the case for sandbox defconfig where
EFI_CAPSULE_FIRMWARE_FIT is enabled for test purpose.
Fixes: 3149e524fc1e ("common: update: add a generic interface for FIT
image")
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
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