From 49db149224a2da4bea7b7674bcbb5f2b6b500754 Mon Sep 17 00:00:00 2001
From: Mark McCaskey <mark@wasmer.io>
Date: Tue, 26 Mar 2019 14:37:47 -0700
Subject: [PATCH] fix arg passing to getcwd syscall

---
 lib/emscripten/src/bitwise.rs      | 8 ++++++++
 lib/emscripten/src/lib.rs          | 4 ++++
 lib/emscripten/src/syscalls/mod.rs | 4 +++-
 3 files changed, 15 insertions(+), 1 deletion(-)
 create mode 100644 lib/emscripten/src/bitwise.rs

diff --git a/lib/emscripten/src/bitwise.rs b/lib/emscripten/src/bitwise.rs
new file mode 100644
index 000000000..aa7fbab32
--- /dev/null
+++ b/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()
+}
diff --git a/lib/emscripten/src/lib.rs b/lib/emscripten/src/lib.rs
index 1bf571c53..60923dea2 100644
--- a/lib/emscripten/src/lib.rs
+++ b/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),
diff --git a/lib/emscripten/src/syscalls/mod.rs b/lib/emscripten/src/syscalls/mod.rs
index de02b998d..36a1b0c7c 100644
--- a/lib/emscripten/src/syscalls/mod.rs
+++ b/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();