diff --git a/src/libcore/os.rs b/src/libcore/os.rs
index d37bdabd48a9..68571da3a1e9 100644
--- a/src/libcore/os.rs
+++ b/src/libcore/os.rs
@@ -32,6 +32,8 @@ use task::TaskBuilder;
 // FIXME: move these to str perhaps? #2620
 
 extern mod rustrt {
+    fn rust_get_argc() -> c_int;
+    fn rust_get_argv() -> **c_char;
     fn rust_getcwd() -> ~str;
     fn rust_path_is_dir(path: *libc::c_char) -> c_int;
     fn rust_path_exists(path: *libc::c_char) -> c_int;
@@ -732,6 +734,14 @@ pub fn set_exit_status(code: int) {
     rustrt::rust_set_exit_status(code as libc::intptr_t);
 }
 
+unsafe fn load_argc_and_argv(argc: c_int, argv: **c_char) -> ~[~str] {
+    let mut args = ~[];
+    for uint::range(0, argc as uint) |i| {
+        vec::push(&mut args, str::raw::from_c_str(*argv.offset(i)));
+    }
+    return args;
+}
+
 /**
  * Returns the command line arguments
  *
@@ -740,23 +750,20 @@ pub fn set_exit_status(code: int) {
 #[cfg(target_os = "macos")]
 fn real_args() -> ~[~str] {
     unsafe {
-        let (argc, argv) = (*_NSGetArgc() as uint, *_NSGetArgv());
-        let mut args = ~[];
-        for uint::range(0, argc) |i| {
-            vec::push(&mut args, str::raw::from_c_str(*argv.offset(i)));
-        }
-        return args;
+        let (argc, argv) = (*_NSGetArgc() as c_int,
+                            *_NSGetArgv() as **c_char);
+        load_argc_and_argv(argc, argv)
     }
 }
 
 #[cfg(target_os = "linux")]
-fn real_args() -> ~[~str] {
-    fail    // Needs implementing.
-}
-
 #[cfg(target_os = "freebsd")]
 fn real_args() -> ~[~str] {
-    fail    // Needs implementing.
+    unsafe {
+        let argc = rustrt::rust_get_argc();
+        let argv = rustrt::rust_get_argv();
+        load_argc_and_argv(argc, argv)
+    }
 }
 
 #[cfg(windows)]
@@ -775,8 +782,9 @@ fn real_args() -> ~[~str] {
             while *ptr.offset(len) != 0 { len += 1; }
 
             // Push it onto the list.
-            vec::push(&mut args, vec::raw::form_slice(ptr, len,
-                                                      str::from_utf16));
+            vec::push(&mut args,
+                      vec::raw::buf_as_slice(ptr, len,
+                                             str::from_utf16));
         }
     }
 
diff --git a/src/rt/rust.cpp b/src/rt/rust.cpp
index dc28f6244155..11e65347f11b 100644
--- a/src/rt/rust.cpp
+++ b/src/rt/rust.cpp
@@ -86,7 +86,7 @@ rust_start(uintptr_t main_fn, int argc, char **argv, void* crate_map) {
     // Load runtime configuration options from the environment.
     // FIXME #1497: Should provide a way to get these from the command
     // line as well.
-    rust_env *env = load_env();
+    rust_env *env = load_env(argc, argv);
 
     global_crate_map = crate_map;
 
diff --git a/src/rt/rust_builtin.cpp b/src/rt/rust_builtin.cpp
index 6f985601f8bd..5baa95c7323f 100644
--- a/src/rt/rust_builtin.cpp
+++ b/src/rt/rust_builtin.cpp
@@ -588,6 +588,18 @@ rust_num_threads() {
     return task->kernel->env->num_sched_threads;
 }
 
+extern "C" CDECL int
+rust_get_argc() {
+    rust_task *task = rust_get_current_task();
+    return task->kernel->env->argc;
+}
+
+extern "C" CDECL char**
+rust_get_argv() {
+    rust_task *task = rust_get_current_task();
+    return task->kernel->env->argv;
+}
+
 extern "C" CDECL rust_sched_id
 rust_new_sched(uintptr_t threads) {
     rust_task *task = rust_get_current_task();
diff --git a/src/rt/rust_env.cpp b/src/rt/rust_env.cpp
index a54dc27c71f4..4e653c8f9e63 100644
--- a/src/rt/rust_env.cpp
+++ b/src/rt/rust_env.cpp
@@ -107,7 +107,7 @@ copyenv(const char* name) {
 }
 
 rust_env*
-load_env() {
+load_env(int argc, char **argv) {
     rust_env *env = (rust_env*)malloc(sizeof(rust_env));
 
     env->num_sched_threads = (size_t)get_num_threads();
@@ -118,7 +118,8 @@ load_env() {
     env->detailed_leaks = getenv(DETAILED_LEAKS) != NULL;
     env->rust_seed = copyenv(RUST_SEED);
     env->poison_on_free = getenv(RUST_POISON_ON_FREE) != NULL;
-
+    env->argc = argc;
+    env->argv = argv;
     return env;
 }
 
diff --git a/src/rt/rust_env.h b/src/rt/rust_env.h
index 007ac9b1e0b1..0e3af9eae60c 100644
--- a/src/rt/rust_env.h
+++ b/src/rt/rust_env.h
@@ -13,9 +13,11 @@ struct rust_env {
     bool detailed_leaks;
     char* rust_seed;
     bool poison_on_free;
+    int argc;
+    char **argv;
 };
 
-rust_env* load_env();
+rust_env* load_env(int argc, char **argv);
 void free_env(rust_env *rust_env);
 
 #endif
diff --git a/src/rt/rustrt.def.in b/src/rt/rustrt.def.in
index 551378a3d6cb..7412f06d8cd8 100644
--- a/src/rt/rustrt.def.in
+++ b/src/rt/rustrt.def.in
@@ -31,6 +31,8 @@ rand_new_seeded2
 rand_next
 rand_seed
 rust_get_sched_id
+rust_get_argc
+rust_get_argv
 rust_new_sched
 rust_new_task_in_sched
 rust_num_threads