create platform mods for syscalls and stub for windows (#161)

* create platform mods for syscalls and stub for windows

* missing constants and duplicate use statements

lib/emscripten/src/syscalls/windows.rs

@@ -0,0 +1,92 @@
+use crate::varargs::VarArgs;
+use libc::mkdir;
+use std::os::raw::c_int;
+use wasmer_runtime_core::vm::Ctx;
+
+type pid_t = c_int;
+
+// chown
+pub fn ___syscall212(which: c_int, mut varargs: VarArgs, ctx: &mut Ctx) -> c_int {
+    debug!("emscripten::___syscall212 (chown) {}", which);
+    -1
+}
+
+// mkdir
+pub fn ___syscall39(which: c_int, mut varargs: VarArgs, ctx: &mut Ctx) -> c_int {
+    debug!("emscripten::___syscall39 (mkdir) {}", which);
+    let pathname: u32 = varargs.get(ctx);
+    let mode: u32 = varargs.get(ctx);
+    let pathname_addr = emscripten_memory_pointer!(ctx.memory(0), pathname) as *const i8;
+    unsafe { mkdir(pathname_addr) }
+}
+
+// getgid
+pub fn ___syscall201(_one: i32, _two: i32, _ctx: &mut Ctx) -> i32 {
+    debug!("emscripten::___syscall201 (getgid)");
+    -1
+}
+
+// getgid32
+pub fn ___syscall202(_one: i32, _two: i32, _ctx: &mut Ctx) -> i32 {
+    // gid_t
+    debug!("emscripten::___syscall202 (getgid32)");
+    -1
+}
+
+/// dup3
+pub fn ___syscall330(_which: c_int, mut varargs: VarArgs, ctx: &mut Ctx) -> pid_t {
+    debug!("emscripten::___syscall330 (dup3)");
+    -1
+}
+
+/// ioctl
+pub fn ___syscall54(which: c_int, mut varargs: VarArgs, ctx: &mut Ctx) -> c_int {
+    debug!("emscripten::___syscall54 (ioctl) {}", which);
+    -1
+}
+
+// socketcall
+#[allow(clippy::cast_ptr_alignment)]
+pub fn ___syscall102(which: c_int, mut varargs: VarArgs, ctx: &mut Ctx) -> c_int {
+    debug!("emscripten::___syscall102 (socketcall) {}", which);
+    -1
+}
+
+// pread
+pub fn ___syscall180(which: c_int, mut varargs: VarArgs, ctx: &mut Ctx) -> c_int {
+    debug!("emscripten::___syscall180 (pread) {}", which);
+    -1
+}
+
+// pwrite
+pub fn ___syscall181(which: c_int, mut varargs: VarArgs, ctx: &mut Ctx) -> c_int {
+    debug!("emscripten::___syscall181 (pwrite) {}", which);
+    -1
+}
+
+/// wait4
+#[allow(clippy::cast_ptr_alignment)]
+pub fn ___syscall114(_which: c_int, mut varargs: VarArgs, ctx: &mut Ctx) -> pid_t {
+    debug!("emscripten::___syscall114 (wait4)");
+    -1
+}
+
+// select
+#[allow(clippy::cast_ptr_alignment)]
+pub fn ___syscall142(which: c_int, mut varargs: VarArgs, ctx: &mut Ctx) -> c_int {
+    debug!("emscripten::___syscall142 (newselect) {}", which);
+    -1
+}
+
+// setpgid
+pub fn ___syscall57(which: c_int, mut varargs: VarArgs, ctx: &mut Ctx) -> c_int {
+    debug!("emscripten::___syscall57 (setpgid) {}", which);
+    -1
+}
+
+/// uname
+// NOTE: Wondering if we should return custom utsname, like Emscripten.
+pub fn ___syscall122(which: c_int, mut varargs: VarArgs, ctx: &mut Ctx) -> c_int {
+    debug!("emscripten::___syscall122 (uname) {}", which);
+    -1
+}