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Add support for signed loads from arena which are internally converted to loads with mode set BPF_PROBE_MEM32SX by the verifier. The implementation is similar to BPF_PROBE_MEMSX and BPF_MEMSX but for BPF_PROBE_MEM32SX, arena_vm_base is added to the src register to form the address. Signed-off-by: Puranjay Mohan <puranjay@kernel.org> Link: https://lore.kernel.org/r/20250923110157.18326-3-puranjay@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>