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Why Does My eBPF Program Work on One Kernel but Fail on Another?
How to Build Truly Portable eBPF Programs
Some environments still rely on legacy versions of Ubuntu or Fedora, while others don't even have their kernels compiled with BTF (BPF Type Format) support. It then resolves types, updates offsets, and adjusts field accesses to ensure the program reads kernel variables correctly. Without BTF support in the target kernel, the loader can't perform field offset relocation, and the program may fail to load or behave incorrectly.
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