SIMD-0189: SBPF stricter ELF headers

SIMD-0189 (SBPF stricter ELF headers) is a Core Standard Solana Improvement Document by Alexander Meißner; proposal status Activated.

Active on mainnet-beta since epoch 993; active on testnet since epoch 954; active on devnet since epoch 1069.

Feature gates

• Feature gate: SIMD-0178/0189/0377: Enables deployment and execution of SBPFv3 programs

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