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[Backport v3.4-branch] Fix linker scripts to define _end correctly #59808

Merged
merged 2 commits into from
Aug 4, 2023
Merged

[Backport v3.4-branch] Fix linker scripts to define _end correctly #59808

merged 2 commits into from
Aug 4, 2023

Commits on Jun 28, 2023

  1. include/zephyr: Fix linker scripts to define _end after all static RA… 

    …M data

The Zephyr linker scripts have inconsistent ordering of various chunks of
data which lands in RAM at runtime. This leads to the value of _end not
being consistently defined as the maximum address of static variables used
in the application.

Create a helper linker fragment, zephyr/linker/ram-end.ld, which can be
included after the last possible definition of RAM data, that consistently
sets _image_ram_end, _end and z_mapped_end.

Signed-off-by: Keith Packard <[email protected]>
(cherry picked from commit 710422e)
    @keith-packard @github-actions
    keith-packard authored and github-actions[bot] committed Jun 28, 2023
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  2. cmake/linker_script: Fix cmake linker scripts to define _end 

    The generated scripts don't include a definition for any symbol indicating
the end of statically allocated memory (such as "_end"). Add a shared cmake
fragment, ram-end.cmake, which contains the necessary instructions to
define _end and z_mapped_end consistently to align with the other sample
linker scripts.

Signed-off-by: Keith Packard <[email protected]>
(cherry picked from commit bbec614)
    @keith-packard @github-actions
    keith-packard authored and github-actions[bot] committed Jun 28, 2023
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