use byteorder::{ByteOrder, LittleEndian}; /// NOTE: TODO: These emscripten api implementation only support wasm32 for now because they assume offsets are u32 use crate::webassembly::{ImportObject, ImportValue, LinearMemory}; use std::mem; // EMSCRIPTEN APIS mod env; mod errno; mod io; mod lock; mod memory; mod nullfunc; mod process; mod signal; mod storage; mod syscalls; mod time; mod utils; mod varargs; pub use self::storage::{align_memory, static_alloc}; pub use self::utils::{is_emscripten_module, copy_cstr_array_into_wasm}; // TODO: Magic number - how is this calculated? const TOTAL_STACK: u32 = 5242880; // TODO: Magic number - how is this calculated? const DYNAMICTOP_PTR_DIFF: u32 = 1088; // TODO: make this variable const STATIC_BUMP: u32 = 215536; fn stacktop(static_bump: u32) -> u32 { align_memory(dynamictop_ptr(static_bump) + 4) } fn stack_max(static_bump: u32) -> u32 { stacktop(static_bump) + TOTAL_STACK } fn dynamic_base(static_bump: u32) -> u32 { align_memory(stack_max(static_bump)) } fn dynamictop_ptr(static_bump: u32) -> u32 { static_bump + DYNAMICTOP_PTR_DIFF } // fn static_alloc(size: usize, static_top: &mut size) -> usize { // let ret = *static_top; // *static_top = (*static_top + size + 15) & (-16 as usize); // ret // } pub fn emscripten_set_up_memory(memory: &mut LinearMemory) { let dynamictop_ptr = dynamictop_ptr(STATIC_BUMP) as usize; let dynamictop_ptr_offset = dynamictop_ptr + mem::size_of::(); // println!("value = {:?}"); // We avoid failures of setting the u32 in our memory if it's out of bounds if dynamictop_ptr_offset > memory.len() { return; // TODO: We should panic instead? } // debug!("###### dynamic_base = {:?}", dynamic_base(STATIC_BUMP)); // debug!("###### dynamictop_ptr = {:?}", dynamictop_ptr); // debug!("###### dynamictop_ptr_offset = {:?}", dynamictop_ptr_offset); let mem = &mut memory[dynamictop_ptr..dynamictop_ptr_offset]; LittleEndian::write_u32(mem, dynamic_base(STATIC_BUMP)); } macro_rules! mock_external { ($import:ident, $name:ident) => {{ extern "C" fn _mocked_fn() -> i32 { debug!("emscripten::{} ", stringify!($name)); -1 } $import.set("env", stringify!($name), ImportValue::Func(_mocked_fn as _)); }}; } pub fn generate_emscripten_env<'a, 'b>() -> ImportObject<&'a str, &'b str> { let mut import_object = ImportObject::new(); // Globals import_object.set( "env", "STACKTOP", ImportValue::Global(stacktop(STATIC_BUMP) as _), ); import_object.set( "env", "STACK_MAX", ImportValue::Global(stack_max(STATIC_BUMP) as _), ); import_object.set( "env", "DYNAMICTOP_PTR", ImportValue::Global(dynamictop_ptr(STATIC_BUMP) as _), ); import_object.set("env", "tableBase", ImportValue::Global(0)); // Print functions import_object.set("env", "printf", ImportValue::Func(io::printf as _)); import_object.set("env", "putchar", ImportValue::Func(io::putchar as _)); // Lock import_object.set("env", "___lock", ImportValue::Func(lock::___lock as _)); import_object.set("env", "___unlock", ImportValue::Func(lock::___unlock as _)); // Env import_object.set("env", "_getenv", ImportValue::Func(env::_getenv as _)); import_object.set("env", "_getpwnam", ImportValue::Func(env::_getpwnam as _)); import_object.set("env", "_getgrnam", ImportValue::Func(env::_getgrnam as _)); import_object.set("env", "___buildEnvironment", ImportValue::Func(env::___build_environment as _)); // Errno import_object.set( "env", "___setErrNo", ImportValue::Func(errno::___seterrno as _), ); // Syscalls import_object.set( "env", "___syscall1", ImportValue::Func(syscalls::___syscall1 as _), ); import_object.set( "env", "___syscall3", ImportValue::Func(syscalls::___syscall3 as _), ); import_object.set( "env", "___syscall4", ImportValue::Func(syscalls::___syscall4 as _), ); import_object.set( "env", "___syscall5", ImportValue::Func(syscalls::___syscall5 as _), ); import_object.set( "env", "___syscall6", ImportValue::Func(syscalls::___syscall6 as _), ); import_object.set( "env", "___syscall54", ImportValue::Func(syscalls::___syscall54 as _), ); import_object.set( "env", "___syscall140", ImportValue::Func(syscalls::___syscall140 as _), ); import_object.set( "env", "___syscall145", ImportValue::Func(syscalls::___syscall145 as _), ); import_object.set( "env", "___syscall146", ImportValue::Func(syscalls::___syscall146 as _), ); import_object.set( "env", "___syscall221", ImportValue::Func(syscalls::___syscall221 as _), ); import_object.set( "env", "___syscall20", ImportValue::Func(syscalls::___syscall20 as _), ); import_object.set( "env", "___syscall64", ImportValue::Func(syscalls::___syscall64 as _), ); import_object.set( "env", "___syscall122", ImportValue::Func(syscalls::___syscall122 as _), ); import_object.set( "env", "___syscall201", ImportValue::Func(syscalls::___syscall201 as _), ); import_object.set( "env", "___syscall202", ImportValue::Func(syscalls::___syscall202 as _), ); import_object.set( "env", "___syscall340", ImportValue::Func(syscalls::___syscall340 as _), ); import_object.set( "env", "___syscall197", ImportValue::Func(syscalls::___syscall197 as _), ); import_object.set( "env", "___syscall180", ImportValue::Func(syscalls::___syscall180 as _), ); import_object.set( "env", "___syscall181", ImportValue::Func(syscalls::___syscall181 as _), ); import_object.set( "env", "___syscall39", ImportValue::Func(syscalls::___syscall39 as _), ); import_object.set( "env", "___syscall195", ImportValue::Func(syscalls::___syscall195 as _), ); import_object.set( "env", "___syscall212", ImportValue::Func(syscalls::___syscall212 as _), ); import_object.set( "env", "___syscall221", ImportValue::Func(syscalls::___syscall221 as _), ); import_object.set( "env", "___syscall102", ImportValue::Func(syscalls::___syscall102 as _), ); import_object.set( "env", "___syscall54", ImportValue::Func(syscalls::___syscall54 as _), ); import_object.set( "env", "___syscall12", ImportValue::Func(syscalls::___syscall12 as _), ); import_object.set( "env", "___syscall192", ImportValue::Func(syscalls::___syscall192 as _), ); import_object.set( "env", "___syscall63", ImportValue::Func(syscalls::___syscall63 as _), ); import_object.set( "env", "___syscall142", ImportValue::Func(syscalls::___syscall142 as _), ); import_object.set( "env", "___syscall57", ImportValue::Func(syscalls::___syscall57 as _), ); // Process import_object.set("env", "abort", ImportValue::Func(process::em_abort as _)); import_object.set("env", "_abort", ImportValue::Func(process::_abort as _)); import_object.set( "env", "abortStackOverflow", ImportValue::Func(process::abort_stack_overflow as _), ); import_object.set("env", "_fork", ImportValue::Func(process::_fork as _)); import_object.set("env", "_exit", ImportValue::Func(process::_exit as _)); // Signal import_object.set( "env", "_sigemptyset", ImportValue::Func(signal::_sigemptyset as _), ); import_object.set( "env", "_sigaddset", ImportValue::Func(signal::_sigaddset as _), ); import_object.set( "env", "_sigprocmask", ImportValue::Func(signal::_sigprocmask as _), ); import_object.set( "env", "_sigaction", ImportValue::Func(signal::_sigaction as _), ); import_object.set( "env", "_signal", ImportValue::Func(signal::_signal as _), ); // Memory import_object.set( "env", "abortOnCannotGrowMemory", ImportValue::Func(memory::abort_on_cannot_grow_memory as _), ); import_object.set( "env", "_emscripten_memcpy_big", ImportValue::Func(memory::_emscripten_memcpy_big as _), ); import_object.set( "env", "enlargeMemory", ImportValue::Func(memory::enlarge_memory as _), ); import_object.set( "env", "getTotalMemory", ImportValue::Func(memory::get_total_memory as _), ); // NullFuncs import_object.set( "env", "nullFunc_ii", ImportValue::Func(nullfunc::nullfunc_ii as _), ); import_object.set( "env", "nullFunc_iii", ImportValue::Func(nullfunc::nullfunc_iii as _), ); import_object.set( "env", "nullFunc_iiii", ImportValue::Func(nullfunc::nullfunc_iiii as _), ); import_object.set( "env", "nullFunc_iiiii", ImportValue::Func(nullfunc::nullfunc_iiiii as _), ); import_object.set( "env", "nullFunc_iiiiii", ImportValue::Func(nullfunc::nullfunc_iiiiii as _), ); import_object.set( "env", "nullFunc_vi", ImportValue::Func(nullfunc::nullfunc_vi as _), ); import_object.set( "env", "nullFunc_vii", ImportValue::Func(nullfunc::nullfunc_vii as _), ); import_object.set( "env", "nullFunc_viii", ImportValue::Func(nullfunc::nullfunc_viii as _), ); import_object.set( "env", "nullFunc_viiii", ImportValue::Func(nullfunc::nullfunc_viiii as _), ); // Time import_object.set( "env", "_gettimeofday", ImportValue::Func(time::_gettimeofday as _), ); import_object.set( "env", "_clock_gettime", ImportValue::Func(time::_clock_gettime as _), ); import_object.set( "env", "_localtime", ImportValue::Func(time::_localtime as _), ); import_object.set("env", "_time", ImportValue::Func(time::_time as _)); import_object.set("env", "_strftime", ImportValue::Func(time::_strftime as _)); import_object.set( "env", "_localtime_r", ImportValue::Func(env::_localtime_r as _), ); import_object.set( "env", "_getpagesize", ImportValue::Func(env::_getpagesize as _), ); import_object.set( "env", "_sysconf", ImportValue::Func(env::_sysconf as _), ); mock_external!(import_object, _waitpid); mock_external!(import_object, _utimes); mock_external!(import_object, _usleep); // mock_external!(import_object, _time); // mock_external!(import_object, _sysconf); // mock_external!(import_object, _strftime); mock_external!(import_object, _sigsuspend); // mock_external!(import_object, _sigprocmask); // mock_external!(import_object, _sigemptyset); // mock_external!(import_object, _sigaddset); // mock_external!(import_object, _sigaction); mock_external!(import_object, _setitimer); mock_external!(import_object, _setgroups); mock_external!(import_object, _setgrent); mock_external!(import_object, _sem_wait); mock_external!(import_object, _sem_post); mock_external!(import_object, _sem_init); mock_external!(import_object, _sched_yield); mock_external!(import_object, _raise); mock_external!(import_object, _mktime); // mock_external!(import_object, _localtime_r); // mock_external!(import_object, _localtime); mock_external!(import_object, _llvm_stacksave); mock_external!(import_object, _llvm_stackrestore); mock_external!(import_object, _kill); mock_external!(import_object, _gmtime_r); // mock_external!(import_object, _gettimeofday); // mock_external!(import_object, _getpagesize); mock_external!(import_object, _getgrent); mock_external!(import_object, _getaddrinfo); // mock_external!(import_object, _fork); // mock_external!(import_object, _exit); mock_external!(import_object, _execve); mock_external!(import_object, _endgrent); // mock_external!(import_object, _clock_gettime); mock_external!(import_object, ___syscall97); mock_external!(import_object, ___syscall91); mock_external!(import_object, ___syscall85); mock_external!(import_object, ___syscall75); mock_external!(import_object, ___syscall66); // mock_external!(import_object, ___syscall64); // mock_external!(import_object, ___syscall63); mock_external!(import_object, ___syscall60); // mock_external!(import_object, ___syscall54); // mock_external!(import_object, ___syscall39); mock_external!(import_object, ___syscall38); // mock_external!(import_object, ___syscall340); mock_external!(import_object, ___syscall334); mock_external!(import_object, ___syscall300); mock_external!(import_object, ___syscall295); mock_external!(import_object, ___syscall272); mock_external!(import_object, ___syscall268); // mock_external!(import_object, ___syscall221); mock_external!(import_object, ___syscall220); // mock_external!(import_object, ___syscall212); // mock_external!(import_object, ___syscall201); mock_external!(import_object, ___syscall199); // mock_external!(import_object, ___syscall197); mock_external!(import_object, ___syscall196); // mock_external!(import_object, ___syscall195); mock_external!(import_object, ___syscall194); mock_external!(import_object, ___syscall191); // mock_external!(import_object, ___syscall181); // mock_external!(import_object, ___syscall180); mock_external!(import_object, ___syscall168); // mock_external!(import_object, ___syscall146); // mock_external!(import_object, ___syscall145); // mock_external!(import_object, ___syscall142); mock_external!(import_object, ___syscall140); // mock_external!(import_object, ___syscall122); // mock_external!(import_object, ___syscall102); // mock_external!(import_object, ___syscall20); mock_external!(import_object, ___syscall15); mock_external!(import_object, ___syscall10); import_object } #[cfg(test)] mod tests { use super::generate_emscripten_env; use crate::webassembly::{instantiate, Export, Instance}; #[test] fn test_putchar() { let wasm_bytes = include_wast2wasm_bytes!("tests/putchar.wast"); let import_object = generate_emscripten_env(); let result_object = instantiate(wasm_bytes, import_object).expect("Not compiled properly"); let func_index = match result_object.module.info.exports.get("main") { Some(&Export::Function(index)) => index, _ => panic!("Function not found"), }; let main: fn(&Instance) = get_instance_function!(result_object.instance, func_index); main(&result_object.instance); } #[test] fn test_print() { let wasm_bytes = include_wast2wasm_bytes!("tests/printf.wast"); let import_object = generate_emscripten_env(); let result_object = instantiate(wasm_bytes, import_object).expect("Not compiled properly"); let func_index = match result_object.module.info.exports.get("main") { Some(&Export::Function(index)) => index, _ => panic!("Function not found"), }; let main: fn(&Instance) = get_instance_function!(result_object.instance, func_index); main(&result_object.instance); } }