diff --git a/psp/src/lib.rs b/psp/src/lib.rs
new file mode 100644
index 00000000..65c2cc40
--- /dev/null
+++ b/psp/src/lib.rs
@@ -0,0 +1,231 @@
+#![allow(stable_features)]
+#![feature(
+    alloc_error_handler,
+    llvm_asm,
+    global_asm,
+    untagged_unions,
+    core_intrinsics,
+    const_loop,
+    const_if_match,
+    const_generics,
+    c_variadic,
+    lang_items,
+)]
+
+// For unwinding support
+#![feature(std_internals, panic_info_message, panic_internals, unwind_attributes)]
+#![cfg_attr(not(feature = "stub-only"), feature(panic_unwind))]
+
+// For the `const_generics` feature.
+#![allow(incomplete_features)]
+
+#![cfg_attr(not(feature = "std"), no_std)]
+
+#[macro_use] extern crate paste;
+#[cfg(not(feature = "stub-only"))] extern crate alloc;
+#[cfg(not(feature = "stub-only"))] extern crate panic_unwind;
+
+#[macro_use]
+#[doc(hidden)]
+#[cfg(not(feature = "stub-only"))]
+pub mod debug;
+
+#[macro_use] mod vfpu;
+mod eabi;
+pub mod math;
+pub mod sys;
+#[cfg(not(feature = "stub-only"))] pub mod test_runner;
+#[cfg(not(feature = "stub-only"))] pub mod vram_alloc;
+
+#[cfg(not(feature = "stub-only"))] mod alloc_impl;
+#[cfg(not(feature = "stub-only"))] pub mod panic;
+
+#[cfg(not(feature = "stub-only"))] mod screenshot;
+#[cfg(not(feature = "stub-only"))] pub use screenshot::*;
+
+#[cfg(not(feature = "stub-only"))] mod benchmark;
+#[cfg(not(feature = "stub-only"))] pub use benchmark::*;
+
+#[cfg(not(feature = "stub-only"))] mod constants;
+#[cfg(not(feature = "stub-only"))] pub use constants::*;
+
+#[cfg(not(feature = "std"))]
+#[cfg(feature = "stub-only")]
+#[panic_handler]
+fn panic(_: &core::panic::PanicInfo) -> ! { loop {} }
+
+#[no_mangle]
+extern "C" fn __rust_foreign_exception() -> ! { loop {} }
+
+#[cfg(feature = "std")]
+pub use std::panic::catch_unwind;
+
+#[cfg(not(feature = "std"))]
+pub use panic::catch_unwind;
+
+#[cfg(feature="embedded-graphics")]
+pub mod embedded_graphics;
+
+#[repr(align(16))]
+pub struct Align16<T>(pub T);
+
+#[cfg(all(target_os = "psp", not(feature = "stub-only")))]
+global_asm!(
+    r#"
+        .section .lib.ent.top, "a", @progbits
+        .align 2
+        .word 0
+    .global __lib_ent_top
+    __lib_ent_top:
+        .section .lib.ent.btm, "a", @progbits
+        .align 2
+    .global __lib_ent_bottom
+    __lib_ent_bottom:
+        .word 0
+
+        .section .lib.stub.top, "a", @progbits
+        .align 2
+        .word 0
+    .global __lib_stub_top
+    __lib_stub_top:
+        .section .lib.stub.btm, "a", @progbits
+        .align 2
+    .global __lib_stub_bottom
+    __lib_stub_bottom:
+        .word 0
+    "#
+);
+
+/// Declare a PSP module.
+///
+/// You must also define a `fn psp_main() { ... }` function in conjunction with
+/// this macro.
+#[macro_export]
+macro_rules! module {
+    ($name:expr, $version_major:expr, $version_minor: expr) => {
+        #[doc(hidden)]
+        mod __psp_module {
+            #[no_mangle]
+            #[link_section = ".rodata.sceModuleInfo"]
+            #[used]
+            static MODULE_INFO: $crate::Align16<$crate::sys::SceModuleInfo> = $crate::Align16(
+                $crate::sys::SceModuleInfo {
+                    mod_attribute: 0,
+                    mod_version: [$version_major, $version_minor],
+                    mod_name: $crate::sys::SceModuleInfo::name($name),
+                    terminal: 0,
+                    gp_value: unsafe { &_gp },
+                    stub_top: unsafe { &__lib_stub_top },
+                    stub_end: unsafe { &__lib_stub_bottom },
+                    ent_top: unsafe { &__lib_ent_top },
+                    ent_end: unsafe { &__lib_ent_bottom },
+                }
+            );
+
+            extern {
+                static _gp: u8;
+                static __lib_ent_bottom: u8;
+                static __lib_ent_top: u8;
+                static __lib_stub_bottom: u8;
+                static __lib_stub_top: u8;
+            }
+
+            #[no_mangle]
+            #[link_section = ".lib.ent"]
+            #[used]
+            static LIB_ENT: $crate::sys::SceLibraryEntry = $crate::sys::SceLibraryEntry {
+                // TODO: Fix this?
+                name: core::ptr::null(),
+                version: ($version_major, $version_minor),
+                attribute: $crate::sys::SceLibAttr::SCE_LIB_IS_SYSLIB,
+                entry_len: 4,
+                var_count: 1,
+                func_count: 1,
+                entry_table: &LIB_ENT_TABLE,
+            };
+
+            #[no_mangle]
+            #[link_section = ".rodata.sceResident"]
+            #[used]
+            static LIB_ENT_TABLE: $crate::sys::SceLibraryEntryTable = $crate::sys::SceLibraryEntryTable {
+                module_start_nid: 0xd632acdb, // module_start
+                module_info_nid: 0xf01d73a7, // SceModuleInfo
+                module_start: module_start,
+                module_info: &MODULE_INFO.0,
+            };
+
+            #[no_mangle]
+            extern "C" fn module_start(_argc: isize, _argv: *const *const u8) -> isize {
+                use $crate::sys::ThreadAttributes;
+                use core::ffi::c_void;
+
+                unsafe {
+                    extern fn main_thread(_argc: usize, _argv: *mut c_void) -> i32 {
+                        // TODO: Maybe print any error to debug screen?
+                        let _ = $crate::catch_unwind(|| {
+                            super::psp_main();
+                        });
+
+                        0
+                    }
+
+                    let id = $crate::sys::sceKernelCreateThread(
+                        &b"main_thread\0"[0],
+                        main_thread,
+                        // default priority of 32.
+                        32,
+                        // 256kb stack
+                        256 * 1024,
+                        ThreadAttributes::USER,
+                        core::ptr::null_mut(),
+                    );
+
+                    $crate::sys::sceKernelStartThread(id, 0, core::ptr::null_mut());
+                }
+
+                0
+            }
+        }
+    }
+}
+
+/// Enable the home button.
+///
+/// This API does not have destructor support yet. You can manually setup an
+/// exit callback if you need this, see the source code of this function.
+pub fn enable_home_button() {
+    use core::{ptr, ffi::c_void};
+    use sys::ThreadAttributes;
+
+    unsafe {
+        unsafe extern fn exit_thread(_args: usize, _argp: *mut c_void) -> i32 {
+            unsafe extern fn exit_callback(_arg1: i32, _arg2: i32, _arg: *mut c_void) -> i32 {
+                sys::sceKernelExitGame();
+                0
+            }
+
+            let id = sys::sceKernelCreateCallback(
+                &b"exit_callback\0"[0],
+                exit_callback,
+                ptr::null_mut(),
+            );
+
+            sys::sceKernelRegisterExitCallback(id);
+            sys::sceKernelSleepThreadCB();
+
+            0
+        }
+
+        // Enable the home button.
+        let id = sys::sceKernelCreateThread(
+            &b"exit_thread\0"[0],
+            exit_thread,
+            32,
+            0x1000,
+            ThreadAttributes::empty(),
+            ptr::null_mut(),
+        );
+
+        sys::sceKernelStartThread(id, 0, ptr::null_mut());
+    }
+}