WIP: fully relocatable llext modules in virtual memory - #11037
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When CONFIG_LLEXT_TYPE_ELF_RELOCATABLE is active, bypass appending static address flags (-Ttext, --section-start, -Tdata) in the linker helper script. This keeps section base addresses at 0. Also adjust the offset calculator to avoid integer parsing errors when all section addresses are set to 0. Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
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Jul 27, 2026
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Need to use single virtual page source for all virtual page allocations.
| #include <zephyr/llext/elf.h> | ||
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| #define LLEXT_LIB_PAGES (CONFIG_LIBRARY_REGION_SIZE / PAGE_SZ) | ||
| SYS_BITARRAY_DEFINE_STATIC(lib_vma_bitarray, LLEXT_LIB_PAGES); |
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see zephyr/lib/alloc.c and the zephyr TLB driver for ACE platforms, we want to have a single VMA allocation i.e. teh one used by vpage allocator should be used.
…table modules Implement page-level virtual memory mapping for LLEXT libraries by reserving VMA ranges from the single shared vpage allocator (zephyr/lib/vpage.c), the same allocator already used by the vregion pipeline-resource-management code. This avoids introducing a second, private virtual-address allocator/region for libraries and keeps all virtual page bookkeeping in one place. Compile section layout at load-time to allocate virtual addresses and rewrite section sh_addr headers in-place. This enables Zephyr LLEXT to naturally relocate references. Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Enable CONFIG_LLEXT_EXPORT_BUILTINS_BY_SLID=y in llext_relocatable.conf to link relocatable LLEXT modules against build-time function signature hashing, providing load-time ABI mismatch protection. Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
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Fully relocatable modules, they - TODO need to reuse virtual memory block allocator.