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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 <keithp@keithp.com> (cherry picked from commit 710422e)
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,14 @@ | ||
/* | ||
* Added after the very last allocation that might land in RAM to define the various | ||
* end-of-used-memory symbols | ||
*/ | ||
|
||
SECTION_PROLOGUE(.last_ram_section,,) | ||
{ | ||
#ifdef LAST_RAM_ALIGN | ||
LAST_RAM_ALIGN | ||
#endif | ||
_image_ram_end = .; | ||
_end = .; /* end of image */ | ||
z_mapped_end = .; | ||
} GROUP_NOLOAD_LINK_IN(RAMABLE_REGION, RAMABLE_REGION) |
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