When CONFIG_LLEXT_STORAGE_WRITABLE is selected and .pre_located is
set, the BSS section is allocated by the user too, no need to
allocate it internally.
Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
By default, normal memory is set readable+writable and not executable.
Adjust those permissions according to each region:
LLEXT_MEM_TEXT --> K_MEM_PERM_EXEC
LLEXT_MEM_DATA, LLEXT_MEM_BSS --> K_MEM_PERM_RW
LLEXT_MEM_RODATA --> K_MEM_PERM_RO aka 0
This must be done only at the end of an LLEXT load operation as memory
needs to remain RW for reloc processing, etc.
And while at it, flush/invalidate the cache accordingly.
Signed-off-by: Nicolas Pitre <npitre@baylibre.com>
Review and improve comments in source code to better describe the API
and the functionality provided by the llext library.
No actual code changes are performed in this commit.
Signed-off-by: Luca Burelli <l.burelli@arduino.cc>
The term "section" has a very specific meaning in the ELF file format.
After 709b2e4 ("llext: automatically merge sections by type"), some of
the code that was originally dealing with ELF sections is now handling
"memory regions" made of multiple ELF sections of the same type.
Make sure to use the term "region" consistently in the code and
log messages to avoid confusion with the original ELF sections.
Notable exception to this is the "ldr->sect" array, which is actively
used outside Zephyr and will need to be phased out in the future.
Signed-off-by: Luca Burelli <l.burelli@arduino.cc>
Move all memory management code to a separate file, llext_mem.c, to
allow for better separation of concerns and to make the code more
readable.
No functional changes are introduced by this commit.
Signed-off-by: Luca Burelli <l.burelli@arduino.cc>
Guennadi Liakhovetski