Dean 利迪恩 deanmlittle

Deconstructing `fib.so`, a minimal sBPF program

For this deconstruction, we will be researching fib.so, a hand-rolled sBPF assembly program that calculates the fibonacci number based upon a u8 input.

Structure of an sBPF program

The structure of an sBPF program has 4 sections:

1. ELF Header

The starting point of the file, describing the overall file format, target environment, and offsets for program and section headers.

2. Program Headers

Define the memory segments and their attributes (readable, writable, executable) for runtime execution.

To make Rust analyzer target target_os="solana" try the following:

Find active_release_dir from your config file with cat ~/.config/solana/install/config.yml (or whatever your config directory is)
Create a .vscode/settings.json file in your project workspace and add the following:

{
    "rust-analyzer.cargo.target": "sbf-solana-solana",
    "rust-analyzer.cargo.extraEnv": {
        "CARGO": "<your_active_release_directory>/bin/sdk/sbf/dependencies/platform-tools/rust/bin/cargo",
 "RUSTC": "/bin/sdk/sbf/dependencies/platform-tools/rust/bin/rustc"

Fix Anchor build on Mac M3

Make sure you have installed XCode from the App store
Select xcode version from appstore: sudo xcode-select -switch /Applications/Xcode.app/Contents/Developer
Confirm by running xcodebuild -version
Install GCC 12 brew install gcc@12
Create a symlink to your usr/local/include folder to make includes discoverable: sudo ln -s /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/* /usr/local/include/

How to setup :

Create a valid8 folder in your path: mkdir ~/.local/share/valid8
Dump the metaplex program there: solana program dump -u m metaqbxxUerdq28cj1RbAWkYQm3ybzjb6a8bt518x1s ~/.local/share/valid8/metadata.so
Create bash script with sudo nano /usr/local/bin/metaplex-test-validator then paste in the following code and save: (if the /user/local/bin directory doesn't exist, you can create it using sudo mkdir -p -m 775 /usr/local/bin)

#!/bin/bash

	/*******************
	* UNLOCKING SCRIPT *
	*******************/

	// Reverse-ordered Winternitz signature scalar and hash offset pairs
	<0x6a1e8e25ac52d4073e6e6792deae3dd16d12580130e8fb1338629cf09cde415f> <0x08>
	<0x171582236c86aacab7a0bdfde1d841bed34a4c712748b46a141bd9a743cb965a> <0x0a>
	<0xc42ebffb891ff91b5cd75c0b2cfa1b1658eb3586bad9a4aaea05a34846765491> <0xf0>
	<0x7faa84fe7faa005ebc37f02b15aa8db41c9ed7c63d8480573471533a0c942096> <0xb0>
	<0xe7bbce18cacf2dbc2ae36122365462a07850e873e961ec4ea318dc6506498790> <0x15>

	#!/bin/bash

	# Check if program ID and name are provided
	if [ "$#" -ne 2 ]; then
	echo "Usage: ./mollusk_generate.sh <ProgramID> <name>"
	exit 1
	fi

	PROGRAM_ID="$1"
	NAME="$2"

	use anchor_lang::{prelude::*, Discriminator};
	pub mod jupiter {
	use super::*;
	declare_id!("JUP6LkbZbjS1jKKwapdHNy74zcZ3tLUZoi5QNyVTaV4");

	#[derive(AnchorDeserialize, AnchorSerialize)]
	pub struct SharedAccountsRoute {
	pub id: u8,
	pub route_plan: Vec<RoutePlanStep>,
	pub in_amount: u64,

	const program = anchor.workspace.AnchorVault as Program<AnchorVault>;

	const connection = anchor.getProvider().connection;

	const signer = Keypair.generate();

	const vault = PublicKey.findProgramAddressSync([Buffer.from("vault"), signer.publicKey.toBuffer()], program.programId)[0];

	const confirm = async (signature: string): Promise<string> => {
	const block = await connection.getLatestBlockhash();

	use anchor_lang::prelude::*;

	// This is your program's public key and it will update
	// automatically when you build the project.
	declare_id!("HL1HGm4o5ygkrMYcyS3WYLK3XXPVLyvp9bPksHQZUeWb");

	#[program]
	mod hello_anchor {
	use super::*;
	pub fn initialize(ctx: Context<Initialize>, _hash: Vec<u8>) -> Result<()> {