Clean up code and fix 0 being a valid addr space index

Cargo.lock

@@ -273,7 +273,7 @@ dependencies = [
 
 [[package]]
 name = "unwinding"
-version = "0.1.4"
+version = "0.1.5"
 dependencies = [
  "gimli",
 ]

src/interrupts.rs

@@ -232,7 +232,7 @@ extern "C" fn syscall_handler() {
                     .map_free(regs.rdx as usize, PageTableFlags::from_bits_truncate(regs.rsi))
                     .map_or(0, |x| x as u64)
             } else if let Some(space) =
-                TASKING.lock().address_spaces_mut().get_mut(regs.rcx as usize)
+                TASKING.lock().address_spaces_mut().get_mut((regs.rcx - 1) as usize)
             {
                 space
                     .map_free(regs.rdx as usize, PageTableFlags::from_bits_truncate(regs.rsi))
@@ -251,11 +251,11 @@ extern "C" fn syscall_handler() {
             retval2 = initrd.len() as u64;
         }
         4 => {
-            retval =
-                TASKING.lock().address_spaces_mut().insert(AddressSpace::new().unwrap()) as u64;
+            retval = (TASKING.lock().address_spaces_mut().insert(AddressSpace::new().unwrap()) + 1)
+                as u64;
         }
         5 => {
-            TASKING.lock().address_spaces_mut().remove(regs.rcx as usize);
+            TASKING.lock().address_spaces_mut().remove((regs.rcx - 1) as usize);
         }
         6 => {
             let page = Page::from_start_address(VirtAddr::new(regs.rdx)).unwrap();
@@ -267,7 +267,7 @@ extern "C" fn syscall_handler() {
                 TASKING
                     .lock()
                     .address_spaces_mut()
-                    .get_mut(regs.rcx as usize)
+                    .get_mut((regs.rcx - 1) as usize)
                     .unwrap()
                     .map_assert_unused(page, num_pages, flags)
             }
@@ -280,7 +280,7 @@ extern "C" fn syscall_handler() {
                 // let aligned_address = regs.rsi & !0xFFF;
                 // let aligned_len = len as u64 + (regs.rsi - aligned_address);
                 let mut tasking = TASKING.lock();
-                let space = tasking.address_spaces_mut().get_mut(regs.rcx as usize).unwrap();
+                let space = tasking.address_spaces_mut().get_mut((regs.rcx - 1) as usize).unwrap();
                 // space
                 //     .map_assert_unused(
                 //         Page::from_start_address(VirtAddr::new(aligned_address)).unwrap(),
@@ -295,7 +295,7 @@ extern "C" fn syscall_handler() {
             }
         }
         8 => {
-            let space = TASKING.lock().address_spaces_mut().remove(regs.rdx as usize);
+            let space = TASKING.lock().address_spaces_mut().remove((regs.rdx - 1) as usize);
             let res = TASKING.lock().new_process(regs.rcx as *const _, space);
             if let Ok(pid) = res {
                 retval = 0;

src/tasking.rs

@@ -78,7 +78,6 @@ extern "C" fn task_force_unlock() {
 }
 
 #[derive(Debug)]
-#[repr(C)]
 struct Process {
     kernel_stack: Box<[usize], &'static ASpaceMutex>,
     kernel_esp: *mut usize,

src/virtual_memory.rs

@@ -225,15 +225,10 @@ impl AddressSpace {
 
     /// Runs a provided closure in an address space.
     ///
-    /// This function takes ownership of the address space and passes it back after running the
-    /// closure. This is necessary to prevent the closure fron having access to the address space by
-    /// both the local variable it was in, and the `ACTIVE_SPACE` static, which would alias mutable
-    /// references.
-    ///
     /// ## Examples
     /// ```
     /// let address_space = AddressSpace::new();
-    /// let address_space = address_space.run(|| {/* your closure here */});
+    /// address_space.run(|| {/* your closure here */});
     /// ```
     #[allow(unused)]
     pub fn run<F: FnOnce()>(&mut self, func: F) {