Binman lets us declare symbols in SPL/TPL that refer to other entries in
the same binman image as them. These symbols are filled in with the
correct values while binman assembles the images, but this is done
in-memory only. Symbols marked as optional can be filled with
BINMAN_SYM_MISSING as an error value if their referred entry is missing.
However, the unmodified SPL/TPL binaries are still available on disk,
and can be used by people. For these files, nothing ensures that the
symbols are set to this error value, and they will be considered valid
when they are not.
Empirically, all symbols show up as zero in a sandbox_vpl build when we
run e.g. tpl/u-boot-tpl directly. On the other hand, zero is a perfectly
fine value for a binman-written symbol, so we cannot say the symbols
have wrong values based on that.
Declare a magic symbol that binman always fills in with a fixed value.
Check this value as an indicator that symbols were filled in correctly.
Return the error value for all symbols when this magic symbol has the
wrong value.
For binman tests, we need to make room for the new symbol in the mocked
SPL/TPL data by extending them by four bytes. This messes up some test
image layouts. Fix the affected values, and check the magic symbol
wherever it makes sense.
Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
Rename this function to make it clear that it only reads loadable
segments. Also update the error for missing module to better match the
message emitted by Python.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
Suggested-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
Allow finding a symbol by its address. Also export the function to get
the file offset of a particular address, so it can be used by a script to
be added.
Signed-off-by: Simon Glass <sjg@chromium.org>
Add a function which reads the segments and the entry address.
Also fix a comment nit in the tests while we are here.
Signed-off-by: Simon Glass <sjg@chromium.org>
WIth EFI we must embed the devicetree in an ELF image so that it is loaded
as part of the executable file. We want it to include the binman
definition in there also, which in some cases cannot be created until the
ELF (u-boot) is built. Add an option to binman to support writing the
updated dtb to the ELF file u-boot.out
This is useful with the EFI app, which is always packaged as an ELF file.
Signed-off-by: Simon Glass <sjg@chromium.org>
Binman needs to be able to update the contents of an ELF file after it has
been build. To support this, add a function to locate the position of a
symbol's contents within the file.
Fix the comments on bss_data.c and Symbol while we are here.
Signed-off-by: Simon Glass <sjg@chromium.org>
At present binman only supports resolving symbols in the same section as
the binary that uses it. This is quite limited because we often need to
group entries into different sections.
Enhance the algorithm to search the entire image for symbols.
Signed-off-by: Simon Glass <sjg@chromium.org>
Currently, binman always runs the compile tools like cc, objcopy, strip,
etc. using their literal name. Instead, this patch makes it use the
target-specific versions by default, derived from the tool-specific
environment variables (CC, OBJCOPY, STRIP, etc.) or from the
CROSS_COMPILE environment variable.
For example, the u-boot-elf etype directly uses 'strip'. Trying to run
the tests with 'CROSS_COMPILE=i686-linux-gnu- binman test' on an arm64
host results in the '097_elf_strip.dts' test to fail as the arm64
version of 'strip' can't understand the format of the x86 ELF file.
This also adjusts some command.Output() calls that caused test errors or
failures to use the target versions of the tools they call. After this,
patch, an arm64 host can run all tests with no errors or failures using
a correct CROSS_COMPILE value.
Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
At present patman sets the python path on startup so that it can access
the libraries it needs. If we convert to use absolute imports this is not
necessary.
Move patman to use absolute imports. This requires changes in tools which
use the patman libraries (which is most of them).
Signed-off-by: Simon Glass <sjg@chromium.org>
At present binman sets the python path on startup so that it can access
the libraries it needs. If we convert to use absolute imports this is not
necessary.
Move binman to use absolute imports. This enables removable of the path
adjusting in Entry also.
Signed-off-by: Simon Glass <sjg@chromium.org>
A recent change adjusted the symbol calculation to work on x86 but broke
it for Tegra. In fact this is because they have different needs.
On x86 devices the code is linked to a ROM address and the end-at-4gb
property is used for the image. In this case there is no need to add the
base address of the image, since the base address is already built into
the offset and image-pos properties.
On other devices we must add the base address since the offsets start at
zero.
In addition the base address is currently added to the 'offset' and 'size'
values. It should in fact only be added to 'image-pos', since 'offset' is
relative to its parent and 'size' is not actually an address. This code
should have been adjusted when support for 'image-pos' and 'size' was
added, but it was not.
To correct these problems:
- move the code that handles adding the base address to section.py, which
can check the end-at-4gb property and which property
(offset/size/image-pos) is being read
- add the base address only when needed (only for image-pos and not if the
image uses end-at-4gb)
- add a note to the documentation
- add a separate test to cover x86 behaviour
Fixes: 15c981cc (binman: Correct symbol calculation with non-zero image base)
Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Stephen Warren <swarren@nvidia.com>
At present binman adds the image base address to the symbol value before
it writes it to the binary. This is not correct since the symbol value
itself (e.g. image position) has no relationship to the image base.
Fix this and update the tests to cover this case.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
At present this command silently fails if something goes wrong. Use the
tools.Run() function instead, since it reports errors.
Signed-off-by: Simon Glass <sjg@chromium.org>
Some versions of binutils generate hidden symbols which are currently not
parsed by binman. Correct this.
Signed-off-by: Simon Glass <sjg@chromium.org>
Recent versions of binutils add a '.note.gnu.property' into the ELF file.
This is not required and interferes with the expected output. Drop it.
Also fix testMakeElf() to use a different file for input and output.
Signed-off-by: Simon Glass <sjg@chromium.org>
Use the new logging feature to log information about progress with
packing. This is useful to see how binman is figuring things out.
Also update elf.py to use the same feature.
Signed-off-by: Simon Glass <sjg@chromium.org>
Add a function which decodes an ELF file, working out where in memory each
part of the data should be written.
Signed-off-by: Simon Glass <sjg@chromium.org>
It is useful to create an ELF file for testing purposes, with just the
right attributes used by the test. Add a function to handle this, along
with a test that it works correctly.
Signed-off-by: Simon Glass <sjg@chromium.org>
Python 3 requires this, and Python 2 allows it. Convert the code over to
ensure compatibility with Python 3.
Signed-off-by: Simon Glass <sjg@chromium.org>
After some thought, I believe there is an unfortunate naming flaw in
binman. Entries have a position and size, but now that we support
hierarchical sections it is unclear whether a position should be an
absolute position within the image, or a relative position within its
parent section.
At present 'position' actually means the relative position. This indicates
a need for an 'image position' for code that wants to find the location of
an entry without having to do calculations back through parents to
discover this image position.
A better name for the current 'position' or 'pos' is 'offset'. It is not
always an absolute position, but it is always an offset from its parent
offset.
It is unfortunate to rename this concept now, 18 months after binman was
introduced. However I believe it is the right thing to do. The impact is
mostly limited to binman itself and a few changes to in-tree users to
binman:
tegra
sunxi
x86
The change makes old binman definitions (e.g. downstream or out-of-tree)
incompatible if they use the 'pos = <...>' property. Later work will
adjust binman to generate an error when it is used.
Signed-off-by: Simon Glass <sjg@chromium.org>
At present this test assumes that the symbols are returned in address
order. However, objdump can list symbols in any order and dictionaries do
not guarantee any particular order when iterating through item.
Update elf.GetSymbols() to return an OrderedDict, sorted by address, to
avoid any problems.
Signed-off-by: Simon Glass <sjg@chromium.org>
We now pass a Section object to these functions rather than an Image.
Rename the parameters to avoid confusion.
Signed-off-by: Simon Glass <sjg@chromium.org>
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from. So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry. Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.
In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.
This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents. There's also a few places where I found we did not have a tag
and have introduced one.
Signed-off-by: Tom Rini <trini@konsulko.com>
Binman construct images consisting of multiple binary files. These files
sometimes need to know (at run timme) where their peers are located. For
example, SPL may want to know where U-Boot is located in the image, so
that it can jump to U-Boot correctly on boot.
In general the positions where the binaries end up after binman has
finished packing them cannot be known at compile time. One reason for
this is that binman does not know the size of the binaries until
everything is compiled, linked and converted to binaries with objcopy.
To make this work, we add a feature to binman which checks each binary
for symbol names starting with '_binman'. These are then decoded to figure
out which entry and property they refer to. Then binman writes the value
of this symbol into the appropriate binary. With this, the symbol will
have the correct value at run time.
Macros are used to make this easier to use. As an example, this declares
a symbol that will access the 'u-boot-spl' entry to find the 'pos' value
(i.e. the position of SPL in the image):
binman_sym_declare(unsigned long, u_boot_spl, pos);
This converts to a symbol called '_binman_u_boot_spl_prop_pos' in any
binary that includes it. Binman then updates the value in that binary,
ensuring that it can be accessed at runtime with:
ulong u_boot_pos = binman_sym(ulong, u_boot_spl, pos);
This assigns the variable u_boot_pos to the position of SPL in the image.
Signed-off-by: Simon Glass <sjg@chromium.org>
The elf module can provide some debugging information to assist with
figuring out what is going wrong. This is also useful in tests. Update the
-D option so that it is passed through to tests as well.
Signed-off-by: Simon Glass <sjg@chromium.org>
In some cases we need to read symbols from U-Boot. At present we have a
a few cases which does this via 'nm' and 'grep'.
It is better to use objdump since that tells us the size of the symbols
and also whether it is weak or not.
Add a new module which reads ELF information from files. Update existing
uses of 'nm' to use this module.
Signed-off-by: Simon Glass <sjg@chromium.org>
