diff --git a/src/apis/emscripten/env.rs b/src/apis/emscripten/env.rs
index 623de1191..22bd32e79 100644
--- a/src/apis/emscripten/env.rs
+++ b/src/apis/emscripten/env.rs
@@ -1,11 +1,17 @@
 use super::super::host;
 /// NOTE: These syscalls only support wasm_32 for now because they take u32 offset
-use libc::{c_int, getpwnam as libc_getpwnam, passwd, getgrnam as libc_getgrnam, group};
+use libc::{
+    c_int, getpwnam as libc_getpwnam, passwd,
+    getgrnam as libc_getgrnam, group, clock_gettime as libc_clock_gettime, timespec,
+    // uname as libc_uname, utsname,
+};
 use std::ffi::CStr;
 use std::os::raw::c_char;
 use std::{slice, mem};
 
 use crate::webassembly::Instance;
+use super::utils::{copy_cstr_into_wasm, copy_terminated_array_of_cstrs};
+use crate::webassembly::LinearMemory;
 
 /// emscripten: _getenv
 pub extern "C" fn _getenv(name_ptr: c_int, instance: &mut Instance) -> c_int {
@@ -22,33 +28,6 @@ pub extern "C" fn _getenv(name_ptr: c_int, instance: &mut Instance) -> c_int {
     }
 }
 
-unsafe fn copy_cstr_into_wasm(instance: &mut Instance, cstr: *const c_char) -> u32 {
-    let s = CStr::from_ptr(cstr).to_str().unwrap();
-    let space_offset = (instance.emscripten_data.malloc)(s.len() as _, instance);
-    let raw_memory = instance.memory_offset_addr(0, space_offset as _) as *mut u8;
-    let mut slice = slice::from_raw_parts_mut(raw_memory, s.len());
-    
-    for (byte, loc) in s.bytes().zip(slice.iter_mut()) {
-        *loc = byte;
-    }
-
-    space_offset
-}
-
-unsafe fn copy_terminated_array_of_cstrs(instance: &mut Instance, cstrs: *mut *mut c_char) -> u32 {
-    let total_num = {
-        let mut ptr = cstrs;
-        let mut counter = 0;
-        while !(*ptr).is_null() {
-            counter += 1;
-            ptr = ptr.add(1);
-        }
-        counter
-    };
-    println!("total_num: {}", total_num);
-    0
-}
-
 pub extern "C" fn _getpwnam(name_ptr: c_int, instance: &mut Instance) -> c_int {
     #[repr(C)]
     struct GuestPasswd {
@@ -111,4 +90,16 @@ pub extern "C" fn _getgrnam(name_ptr: c_int, instance: &mut Instance) -> c_int {
 
         group_struct_offset as c_int
     }
-}
\ No newline at end of file
+}
+
+pub extern fn _localtime_r() -> u32 {
+    0
+}
+
+pub extern fn _getpagesize() -> u32 {
+    LinearMemory::PAGE_SIZE
+}
+
+pub extern fn _prlimit(pid: c_int, resource: c_int, new_limit: c_int, old_limit: c_int, instance: &mut Instance) -> c_int {
+    0
+}
diff --git a/src/apis/emscripten/memory.rs b/src/apis/emscripten/memory.rs
index cbaa7e6bf..241fe462e 100644
--- a/src/apis/emscripten/memory.rs
+++ b/src/apis/emscripten/memory.rs
@@ -21,7 +21,8 @@ pub extern "C" fn _emscripten_memcpy_big(
 /// emscripten: getTotalMemory
 pub extern "C" fn get_total_memory(instance: &mut Instance) -> u32 {
     debug!("emscripten::get_total_memory");
-    instance.memories[0].current_pages()
+    // instance.memories[0].current_pages()
+    16777216
 }
 
 /// emscripten: enlargeMemory
diff --git a/src/apis/emscripten/mod.rs b/src/apis/emscripten/mod.rs
index 062edbf51..a5b5df2b1 100644
--- a/src/apis/emscripten/mod.rs
+++ b/src/apis/emscripten/mod.rs
@@ -57,9 +57,9 @@ pub fn emscripten_set_up_memory(memory: &mut LinearMemory) {
 
 macro_rules! mock_external {
     ($import:ident, $name:ident) => {{
-        fn _mocked_fn() {
+        extern fn _mocked_fn() -> i32 {
             debug!("emscripten::{} <mock>", stringify!($name));
-            // return 0
+            -1
         }
         $import.set(
             "env",
@@ -133,6 +133,16 @@ pub fn generate_emscripten_env<'a, 'b>() -> ImportObject<&'a str, &'b str> {
         "_getenv",
         ImportValue::Func(env::_getenv as *const u8),
     );
+    import_object.set(
+        "env",
+        "_getpwnam",
+        ImportValue::Func(env::_getpwnam as _),
+    );
+    import_object.set(
+        "env",
+        "_getgrnam",
+        ImportValue::Func(env::_getgrnam as _),
+    );
     // Errno
     import_object.set(
         "env",
@@ -288,18 +298,7 @@ pub fn generate_emscripten_env<'a, 'b>() -> ImportObject<&'a str, &'b str> {
         "nullFunc_viiii",
         ImportValue::Func(nullfunc::nullfunc_viiii as *const u8),
     );
-
-    // named syscalls
-    import_object.set(
-        "env",
-        "_getpwnam",
-        ImportValue::Func(env::_getpwnam as _),
-    );
-    import_object.set(
-        "env",
-        "_getgrnam",
-        ImportValue::Func(env::_getgrnam as _),
-    );
+    // Time
     import_object.set(
         "env",
         "_gettimeofday",
@@ -310,11 +309,31 @@ pub fn generate_emscripten_env<'a, 'b>() -> ImportObject<&'a str, &'b str> {
         "_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",
+        "_localtime_r",
+        ImportValue::Func(env::_localtime_r as _),
+    );
+    import_object.set(
+        "env",
+        "_getpagesize",
+        ImportValue::Func(env::_getpagesize 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, _time);
     mock_external!(import_object, _sysconf);
     mock_external!(import_object, _strftime);
     mock_external!(import_object, _sigsuspend);
@@ -331,14 +350,14 @@ pub fn generate_emscripten_env<'a, 'b>() -> ImportObject<&'a str, &'b str> {
     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_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, _getpagesize);
     mock_external!(import_object, _getgrent);
     mock_external!(import_object, _getaddrinfo);
     mock_external!(import_object, _fork);
diff --git a/src/apis/emscripten/time.rs b/src/apis/emscripten/time.rs
index 85c9d7519..ebb089fd9 100644
--- a/src/apis/emscripten/time.rs
+++ b/src/apis/emscripten/time.rs
@@ -1,5 +1,19 @@
-use libc::{gettimeofday, timeval, c_int, clock_gettime, clockid_t, timespec};
-use std::ptr;
+use libc::{
+    gettimeofday,
+    timeval,
+    c_int,
+    clock_gettime,
+    clock_gettime as libc_clock_gettime,
+    clockid_t,
+    timespec,
+    tm,
+    localtime,
+    time_t,
+    time
+};
+use std::{ptr, slice, mem};
+use std::time::SystemTime;
+
 
 use crate::webassembly::Instance;
 
@@ -18,6 +32,25 @@ pub extern "C" fn _gettimeofday(timeval_ptr_offset: c_int, tz_offset: c_int, ins
         returned
     }
 }
+// pub extern fn _gettimeofday(tp: c_int, tz: c_int, instance: &mut Instance) -> c_int {
+//     #[repr(C)]
+//     struct GuestTimeVal {
+//         tv_sec: i32,
+//         tv_usec: i32,
+//     }
+
+//     assert!(tz == 0, "the timezone argument of `_gettimeofday` must be null");
+//     unsafe {
+//         let now = SystemTime::now();
+//         let since_epoch = now.duration_since(SystemTime::UNIX_EPOCH).unwrap();
+//         let timeval_struct_ptr = instance.memory_offset_addr(0, tp as _) as *mut GuestTimeVal;
+
+//         (*timeval_struct_ptr).tv_sec = since_epoch.as_secs() as _;
+//         (*timeval_struct_ptr).tv_usec = since_epoch.subsec_nanos() as _;
+//     }
+//     0
+// }
+
 
 /// emscripten: _clock_gettime
 pub extern "C" fn _clock_gettime(clk_id: clockid_t, tp_offset: c_int, instance: &mut Instance) -> c_int {
@@ -30,3 +63,47 @@ pub extern "C" fn _clock_gettime(clk_id: clockid_t, tp_offset: c_int, instance:
         returned
     }
 }
+
+// pub extern fn _clock_gettime(clk_id: c_int, tp: c_int, instance: &mut Instance) -> c_int {
+//     #[repr(C)]
+//     struct GuestTimeSpec {
+//         tv_sec: i32,
+//         tv_nsec: i32,
+//     }
+
+//     unsafe {
+//         let mut timespec = timespec {
+//             tv_sec: 0,
+//             tv_nsec: 0,
+//         };
+//         let ret = libc_clock_gettime(clk_id as _, &mut timespec);
+//         if ret != 0 {
+//             return ret;
+//         }
+
+//         let timespec_struct_ptr = instance.memory_offset_addr(0, tp as _) as *mut GuestTimeSpec;
+//         (*timespec_struct_ptr).tv_sec = timespec.tv_sec as _;
+//         (*timespec_struct_ptr).tv_nsec = timespec.tv_nsec as _;
+//     }
+//     0
+// }
+
+/// emscripten: _localtime
+pub extern "C" fn _localtime(time_p: u32, instance: &mut Instance) -> *mut tm {
+    debug!("emscripten::_localtime {}", time_p);
+
+    unsafe {
+        let time_p_addr = instance.memory_offset_addr(0, time_p as _) as *mut i64;
+        localtime(time_p_addr)
+    }
+}
+
+/// emscripten: _time
+pub extern "C" fn _time(time_p: u32, instance: &mut Instance) -> time_t {
+    debug!("emscripten::_time {}", time_p);
+
+    unsafe {
+        let time_p_addr = instance.memory_offset_addr(0, time_p as _) as *mut i64;
+        time(time_p_addr)
+    }
+}
diff --git a/src/apis/emscripten/utils.rs b/src/apis/emscripten/utils.rs
index bbc659a0c..3c2d66153 100644
--- a/src/apis/emscripten/utils.rs
+++ b/src/apis/emscripten/utils.rs
@@ -1,4 +1,8 @@
 use crate::webassembly::module::Module;
+use crate::webassembly::Instance;
+use std::ffi::CStr;
+use std::os::raw::c_char;
+use std::{slice, mem};
 
 /// We check if a provided module is an Emscripten generated one
 pub fn is_emscripten_module(module: &Module) -> bool {
@@ -10,6 +14,32 @@ pub fn is_emscripten_module(module: &Module) -> bool {
     return false;
 }
 
+pub unsafe fn copy_cstr_into_wasm(instance: &mut Instance, cstr: *const c_char) -> u32 {
+    let s = CStr::from_ptr(cstr).to_str().unwrap();
+    let space_offset = (instance.emscripten_data.malloc)(s.len() as _, instance);
+    let raw_memory = instance.memory_offset_addr(0, space_offset as _) as *mut u8;
+    let mut slice = slice::from_raw_parts_mut(raw_memory, s.len());
+
+    for (byte, loc) in s.bytes().zip(slice.iter_mut()) {
+        *loc = byte;
+    }
+    space_offset
+}
+
+pub unsafe fn copy_terminated_array_of_cstrs(instance: &mut Instance, cstrs: *mut *mut c_char) -> u32 {
+    let total_num = {
+        let mut ptr = cstrs;
+        let mut counter = 0;
+        while !(*ptr).is_null() {
+            counter += 1;
+            ptr = ptr.add(1);
+        }
+        counter
+    };
+    println!("total_num: {}", total_num);
+    0
+}
+
 #[cfg(test)]
 mod tests {
     use super::super::generate_emscripten_env;