diff options
| author | Simon Glass <sjg@chromium.org> | 2023-01-11 16:10:17 -0700 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2023-01-18 14:55:41 -0700 |
| commit | c1157860c5e9ca45e41859e013ed83919e7397f0 (patch) | |
| tree | c2b4f1cf8570fcc3e03264e8e105a25674a654e6 /tools/binman/elf.py | |
| parent | 9766f69c98c2aa056d0518a9545f9e89484e9172 (diff) | |
binman: Provide general support for updating ELF symbols
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>
Diffstat (limited to 'tools/binman/elf.py')
| -rw-r--r-- | tools/binman/elf.py | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/tools/binman/elf.py b/tools/binman/elf.py index 73f318b81d2..9ac00ed9ccf 100644 --- a/tools/binman/elf.py +++ b/tools/binman/elf.py @@ -210,7 +210,8 @@ def GetPackString(sym, msg): raise ValueError('%s has size %d: only 4 and 8 are supported' % (msg, sym.size)) -def LookupAndWriteSymbols(elf_fname, entry, section, is_elf=False): +def LookupAndWriteSymbols(elf_fname, entry, section, is_elf=False, + base_sym=None): """Replace all symbols in an entry with their correct values The entry contents is updated so that values for referenced symbols will be @@ -223,7 +224,10 @@ def LookupAndWriteSymbols(elf_fname, entry, section, is_elf=False): entry entry: Entry to process section: Section which can be used to lookup symbol values + base_sym: Base symbol marking the start of the image """ + if not base_sym: + base_sym = '__image_copy_start' fname = tools.get_input_filename(elf_fname) syms = GetSymbols(fname, ['image', 'binman']) if is_elf: @@ -243,7 +247,7 @@ def LookupAndWriteSymbols(elf_fname, entry, section, is_elf=False): if not syms: tout.debug('LookupAndWriteSymbols: no syms') return - base = syms.get('__image_copy_start') + base = syms.get(base_sym) if not base and not is_elf: tout.debug('LookupAndWriteSymbols: no base') return |