The current support for updating variables in a binary is hard-coded to
work with U-Boot:
- It assumes the image starts at __image_copy_start
- It uses the existing U-Boot-specific entry types
It is useful for other projects to use these feature.
Add properties to enable writing symbols for any blob, a way of specifying
the base symbol and a way of providing the ELF filename to allow symbol
lookup to take place.
With this it is possible to update a Zephyr image, such as zephyr.bin
after it has been built.
Signed-off-by: Simon Glass <sjg@chromium.org>
Enabling CONFIG_BINMAN makes binman run after a build to package any
images specified in the device-tree. It also enables a mechanism for
SPL/TPL to declare and use special linker symbols that refer to other
entries in the same binman image. A similar feature that gets this info
from the device-tree exists for U-Boot proper, but it is gated behind a
CONFIG_BINMAN_FDT unlike the symbols.
Confusingly, CONFIG_SPL/TPL_BINMAN_SYMBOLS also exist. These configs
don't actually enable/disable the symbols mechanism as one would expect,
but declare some symbols for U-Boot using this mechanism.
Reuse the BINMAN_SYMBOLS configs to make them toggle the symbols
mechanism, and declare symbols for the U-Boot phases in a dependent
BINMAN_UBOOT_SYMBOLS config. Extend it to cover symbols of all phases.
Update the config prompt and help message to make it clearer about this.
Fix binman test binaries to work with CONFIG_IS_ENABLED(BINMAN_SYMBOLS).
Co-developed-by: Peng Fan <peng.fan@nxp.com>
[Alper: New config for phase symbols, update Kconfigs, commit message]
Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
Add a file that has two text sections at different addresses, so we can
test this behaviour in binman, once added.
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>
These test files are currently "intended for use on x86 hosts", but most
of the tests using them can still pass when cross-compiled to x86 on an
arm64 host.
This patch enables non-x86 hosts to run the tests by specifying a
cross-compiler via CROSS_COMPILE. The list of variables it sets is taken
from the top-level Makefile. It would be possible to automatically set
an x86 cross-compiler with a few blocks like:
ifneq ($(shell i386-linux-gnu-gcc --version 2> /dev/null),)
CROSS_COMPILE = i386-linux-gnu-
endif
But it wouldn't propagate to the binman process calling this Makefile,
so it's better just raise an error and expect 'binman test' to be run
with a correct CROSS_COMPILE.
Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
Reviewed-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>
We use the Makefile for all ELF test files now, so drop all the code that
checks whether to get the test file from the Makefile or from the git
repo.
Also add a comment to the Makefile indicating that it is run from binman.
Signed-off-by: Simon Glass <sjg@chromium.org>
Remove this file from git and instead build it using the Makefile.
With this change a few things need to be adjusted:
1. The 'notes' section no-longer appears at the start of the ELF file
(before the code), so update testSymbols to adjust the offsets.
2. The dynamic linker is disabled to avoid errors like:
"Not enough room for program headers, try linking with -N"
3. The interpreter note is moved to the end of the image, so that the
binman symbols appear first.
Signed-off-by: Simon Glass <sjg@chromium.org>
Remove this file from git and instead build it using the Makefile.
Update tools.GetInputFilename() to support reading files from an absolute
path, so that we can read the Elf test files easily. Also make sure that
the temp directory is report in ELF tests as this was commented out.
Signed-off-by: Simon Glass <sjg@chromium.org>
At present the ELF test files are checked into the U-Boot tree. This is
covenient since the files never change and can be used on non-x86
platforms. However it is not good practice to check in binaries and in
this case it does not seem essential.
Update the binman test-file Makefile to support having source in a
different directory. Adjust binman to run it to build bss_data, as a
start. We can add other files as needed.
Signed-off-by: Simon Glass <sjg@chromium.org>
For testing we need to build some ELF files containing binman symbols. Add
these to the Makefile and check in the binaries:
u_boot_binman_syms - normal, valid ELF file
u_boot_binman_syms_bad - missing the __image_copy_start symbol
u_boot_binman_syms_size - has a binman symbol with an invalid size
Signed-off-by: Simon Glass <sjg@chromium.org>
These test programs are includedd as binary files in U-Boot to avoid
having to build them (and associated toolchain differences). Instructions
on building are in the files themselves, but it seems better to provide
a Makefile which can be manually run when desired.
Add a Makefile, separate from the normal build system, to handle this.
Signed-off-by: Simon Glass <sjg@chromium.org>
