zephyr

Primary Git Repository for the Zephyr Project. Zephyr is a new generation, scalable, optimized, secure RTOS for multiple hardware architectures.

bluetooth bluetooth-le embedded embedded-c iot mcu microcontroller real-time rtos zephyr zephyr-rtos zephyros

History

Grzegorz Swiderski 460b6ef122 code_relocation: Add NOKEEP option When using the code and data relocation feature, every relocated symbol would be marked with `KEEP()` in the generated linker script. Therefore, if any input files contained unused code, then it wouldn't be discarded by the linker, even when invoked with `--gc-sections`. This can cause unexpected bloat, or other link-time issues stemming from some symbols being discarded and others not. On the other hand, this behavior has been present since the feature's introduction, so it should remain default for the users who rely on it. This patch introduces support for `zephyr_code_relocate(... NOKEEP)`. This will suppress the generation of `KEEP()` statements for all symbols in a particular library or set of files. Much like `NOCOPY`, the `NOKEEP` flag is passed to `gen_relocate_app.py` in string form. The script is now equipped to handle multiple such flags when passed from CMake as a semicolon-separated list, like so: "SRAM2:NOCOPY;NOKEEP:/path/to/file1.c;/path/to/file2.c" Documentation and tests are updated here as well. Signed-off-by: Grzegorz Swiderski <grzegorz.swiderski@nordicsemi.no>	2 years ago
..
code_relocation	code_relocation: Add NOKEEP option	2 years ago
gen_inc_file	tests/*: Switch integration platform to native_sim	2 years ago

Grzegorz Swiderski 460b6ef122 code_relocation: Add NOKEEP option

When using the code and data relocation feature, every relocated symbol
would be marked with `KEEP()` in the generated linker script. Therefore,
if any input files contained unused code, then it wouldn't be discarded
by the linker, even when invoked with `--gc-sections`.

This can cause unexpected bloat, or other link-time issues stemming from
some symbols being discarded and others not.

On the other hand, this behavior has been present since the feature's
introduction, so it should remain default for the users who rely on it.

This patch introduces support for `zephyr_code_relocate(... NOKEEP)`.
This will suppress the generation of `KEEP()` statements for all symbols
in a particular library or set of files.

Much like `NOCOPY`, the `NOKEEP` flag is passed to `gen_relocate_app.py`
in string form. The script is now equipped to handle multiple such flags
when passed from CMake as a semicolon-separated list, like so:

   "SRAM2:NOCOPY;NOKEEP:/path/to/file1.c;/path/to/file2.c"

Documentation and tests are updated here as well.

Signed-off-by: Grzegorz Swiderski <grzegorz.swiderski@nordicsemi.no>

2 years ago

code_relocation

code_relocation: Add NOKEEP option

2 years ago

gen_inc_file

tests/*: Switch integration platform to native_sim

2 years ago