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Lazily calculate target pc for CALL_IMM
#627
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In SBPFv2, the
CALL_IMMinstruction only contains relative addresses in its immediate field, so we do not need to relocate it during loading.Also, this PR addresses the comment https://github.com/solana-labs/rbpf/pull/620/files#r1822346064, properly evaluating the address in the verifier and during execution.