fix arg passing to getcwd syscall

lib/emscripten/src/bitwise.rs

@@ -0,0 +1,8 @@
+use wasmer_runtime_core::vm::Ctx;
+
+///emscripten: _llvm_bswap_i64
+pub fn _llvm_bswap_i64(_ctx: &mut Ctx, _low: i32, high: i32) -> i32 {
+    debug!("emscripten::_llvm_bswap_i64");
+    // setTempRet0(low.swap_bytes)
+    high.swap_bytes()
+}

lib/emscripten/src/lib.rs

@@ -27,6 +27,7 @@ mod file_descriptor;
 pub mod stdio;
 
 // EMSCRIPTEN APIS
+mod bitwise;
 mod emscripten_target;
 mod env;
 mod errno;
@@ -622,6 +623,9 @@ pub fn generate_emscripten_env(globals: &mut EmscriptenGlobals) -> ImportObject
             "_llvm_cos_f64" => func!(crate::math::_llvm_cos_f64),
             "_emscripten_random" => func!(crate::math::_emscripten_random),
 
+            // Bitwise
+            "_llvm_bswap_i64" => func!(crate::bitwise::_llvm_bswap_i64),
+
             // Jump
             "__setjmp" => func!(crate::jmp::__setjmp),
             "__longjmp" => func!(crate::jmp::__longjmp),

lib/emscripten/src/syscalls/mod.rs

@@ -209,9 +209,11 @@ pub fn ___syscall110(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
 }
 
 // getcwd
-pub fn ___syscall183(ctx: &mut Ctx, buf_offset: u32, _size: u32) -> u32 {
+pub fn ___syscall183(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> i32 {
     debug!("emscripten::___syscall183");
     use std::env;
+    let buf_offset: c_int = varargs.get(ctx);
+    let _size: c_int = varargs.get(ctx);
     let path = env::current_dir();
     let path_string = path.unwrap().display().to_string();
     let len = path_string.len();