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Original file line number | Diff line number | Diff line change |
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use std::fmt::Display; | ||
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pub enum ParamType { | ||
I32, | ||
I64, | ||
} | ||
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impl Display for ParamType { | ||
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { | ||
use ParamType::*; | ||
match self { | ||
I32 => write!(f, "i32"), | ||
I64 => write!(f, "i64"), | ||
} | ||
} | ||
} | ||
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use ParamType::*; | ||
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/// order matters! | ||
pub const HOSTIOS: [(&str, &[ParamType], &[ParamType]); 42] = [ | ||
("read_args", &[I32], &[]), | ||
("write_result", &[I32, I32], &[]), | ||
("exit_early", &[I32], &[]), | ||
("storage_load_bytes32", &[I32, I32], &[]), | ||
("storage_cache_bytes32", &[I32, I32], &[]), | ||
("storage_flush_cache", &[I32], &[]), | ||
("transient_load_bytes32", &[I32, I32], &[]), | ||
("transient_store_bytes32", &[I32, I32], &[]), | ||
("call_contract", &[I32, I32, I32, I32, I64, I32], &[I32]), | ||
("delegate_call_contract", &[I32, I32, I32, I64, I32], &[I32]), | ||
("static_call_contract", &[I32, I32, I32, I64, I32], &[I32]), | ||
("create1", &[I32, I32, I32, I32, I32], &[]), | ||
("create2", &[I32, I32, I32, I32, I32, I32], &[]), | ||
("read_return_data", &[I32, I32, I32], &[I32]), | ||
("return_data_size", &[], &[I32]), | ||
("emit_log", &[I32, I32, I32], &[]), | ||
("account_balance", &[I32, I32], &[]), | ||
("account_code", &[I32, I32, I32, I32], &[I32]), | ||
("account_code_size", &[I32], &[I32]), | ||
("account_codehash", &[I32, I32], &[]), | ||
("evm_gas_left", &[], &[I64]), | ||
("evm_ink_left", &[], &[I64]), | ||
("block_basefee", &[I32], &[]), | ||
("chainid", &[], &[I64]), | ||
("block_coinbase", &[I32], &[]), | ||
("block_gas_limit", &[], &[I64]), | ||
("block_number", &[], &[I64]), | ||
("block_timestamp", &[], &[I64]), | ||
("contract_address", &[I32], &[]), | ||
("math_div", &[I32, I32], &[]), | ||
("math_mod", &[I32, I32], &[]), | ||
("math_pow", &[I32, I32], &[]), | ||
("math_add_mod", &[I32, I32, I32], &[]), | ||
("math_mul_mod", &[I32, I32, I32], &[]), | ||
("msg_reentrant", &[], &[I32]), | ||
("msg_sender", &[I32], &[]), | ||
("msg_value", &[I32], &[]), | ||
("native_keccak256", &[I32, I32, I32], &[]), | ||
("tx_gas_price", &[I32], &[]), | ||
("tx_ink_price", &[], &[I32]), | ||
("tx_origin", &[I32], &[]), | ||
("pay_for_memory_grow", &[I32], &[]), | ||
]; |
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,89 @@ | ||
use arbutil::hostios::HOSTIOS; | ||
use std::{env, fmt::Write, fs, path::Path}; | ||
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pub fn gen_forwarder(out_path: &Path) { | ||
let mut wat = String::new(); | ||
macro_rules! wln { | ||
($($text:tt)*) => { | ||
writeln!(wat, $($text)*).unwrap(); | ||
}; | ||
} | ||
let s = " "; | ||
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wln!("(module"); | ||
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macro_rules! group { | ||
($list:expr, $kind:expr) => { | ||
(!$list.is_empty()) | ||
.then(|| { | ||
format!( | ||
" ({} {})", | ||
$kind, | ||
$list | ||
.iter() | ||
.map(|x| x.to_string()) | ||
.collect::<Vec<_>>() | ||
.join(" ") | ||
) | ||
}) | ||
.unwrap_or_default() | ||
}; | ||
} | ||
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wln!("{s};; symbols to re-export"); | ||
for (name, ins, outs) in HOSTIOS { | ||
let params = group!(ins, "param"); | ||
let result = group!(outs, "result"); | ||
wln!(r#"{s}(import "user_host" "{name}" (func $_{name}{params}{result}))"#); | ||
} | ||
wln!(); | ||
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wln!("{s};; reserved offsets for future user_host imports"); | ||
for i in HOSTIOS.len()..512 { | ||
wln!("{s}(func $reserved_{i} unreachable)"); | ||
} | ||
wln!(); | ||
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wln!( | ||
"{s};; allows user_host to request a trap\n\ | ||
{s}(global $trap (mut i32) (i32.const 0))\n\ | ||
{s}(func $check\n\ | ||
{s}{s}global.get $trap ;; see if set\n\ | ||
{s}{s}(global.set $trap (i32.const 0)) ;; reset the flag\n\ | ||
{s}{s}(if (then (unreachable)))\n\ | ||
{s})\n\ | ||
{s}(func (export \"forward__set_trap\")\n\ | ||
{s}{s}(global.set $trap (i32.const 1))\n\ | ||
{s})\n" | ||
); | ||
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wln!("{s};; user linkage"); | ||
for (name, ins, outs) in HOSTIOS { | ||
let params = group!(ins, "param"); | ||
let result = group!(outs, "result"); | ||
wln!("{s}(func (export \"vm_hooks__{name}\"){params}{result}"); | ||
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for i in 0..ins.len() { | ||
wln!("{s}{s}local.get {i}"); | ||
} | ||
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wln!( | ||
"{s}{s}call $_{name}\n\ | ||
{s}{s}call $check\n\ | ||
{s})" | ||
); | ||
} | ||
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wln!(")"); | ||
eprintln!("{}", &wat); | ||
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let wasm = wasmer::wat2wasm(wat.as_bytes()).unwrap(); | ||
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fs::write(out_path, wasm.as_ref()).unwrap(); | ||
} | ||
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fn main() { | ||
let out_dir = env::var("OUT_DIR").unwrap(); | ||
let forwarder_path = Path::new(&out_dir).join("forwarder.wasm"); | ||
gen_forwarder(&forwarder_path); | ||
} |
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