Merge #109

109: port libhermit to support C-based applications r=stlankes a=stlankes

- using of VirtAddr also for newlib-based applications
Co-authored-by: Stefan Lankes <slankes@eonerc.rwth-aachen.de>

CMakeLists.txt

@@ -5,7 +5,7 @@ set(HERMIT_RS "${CMAKE_BINARY_DIR}/hermit_rs/${HERMIT_ARCH}-unknown-hermit-kerne
 add_custom_target(hermit_rs
 	COMMAND
 		${CMAKE_COMMAND} -E env CARGO_TARGET_DIR=${CMAKE_BINARY_DIR}/hermit_rs RUST_TARGET_PATH=${HERMIT_ROOT}/librs
-		cargo xbuild ${CARGO_BUILDTYPE_PARAMETER} --target ${HERMIT_ARCH}-unknown-hermit-kernel.json --features newlib
+		cargo build ${CARGO_BUILDTYPE_PARAMETER} -Z build-std=core,alloc --target ${HERMIT_ARCH}-unknown-hermit-kernel.json --features newlib
 	WORKING_DIRECTORY
 		${CMAKE_CURRENT_LIST_DIR})
 

aarch64-unknown-hermit-kernel.json

@@ -4,7 +4,7 @@
     "target-endian": "little",
     "target-pointer-width": "64",
     "target-c-int-width" : "32",
-    "os": "none",
+    "os": "hermit",
     "arch": "aarch64",
     "data-layout": "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128",
     "pre-link-args": {

src/mm/mod.rs

@@ -122,7 +122,7 @@ pub fn init() {
 		let size = 2 * LargePageSize::SIZE;
 		unsafe {
 			let start = allocate(size, true);
-			crate::ALLOCATOR.lock().init(start, size);
+			crate::ALLOCATOR.lock().init(start.as_usize(), size);
 		}
 
 		info!("Kernel heap size: {} MB", size >> 20);

src/scheduler/mod.rs

@@ -258,7 +258,7 @@ impl PerCoreScheduler {
 	#[cfg(feature = "newlib")]
 	#[inline]
 	pub fn get_lwip_errno(&self) -> i32 {
-		irqsave(|| self.current_task.borrow().lwip_errno);
+		irqsave(|| self.current_task.borrow().lwip_errno)
 	}
 
 	#[inline]

src/syscalls/tasks.rs

@@ -87,7 +87,7 @@ static SBRK_COUNTER: AtomicUsize = AtomicUsize::new(0);
 
 #[cfg(feature = "newlib")]
 pub fn sbrk_init() {
-	SBRK_COUNTER.store(task_heap_start(), Ordering::SeqCst);
+	SBRK_COUNTER.store(task_heap_start().as_usize(), Ordering::SeqCst);
 }
 
 #[cfg(feature = "newlib")]
@@ -99,10 +99,10 @@ fn __sys_sbrk(incr: isize) -> usize {
 
 	if incr >= 0 {
 		old_end = SBRK_COUNTER.fetch_add(incr as usize, Ordering::SeqCst);
-		assert!(task_heap_end >= old_end + incr as usize);
+		assert!(task_heap_end.as_usize() >= old_end + incr as usize);
 	} else {
 		old_end = SBRK_COUNTER.fetch_sub(incr.abs() as usize, Ordering::SeqCst);
-		assert!(task_heap_start < old_end - incr.abs() as usize);
+		assert!(task_heap_start.as_usize() < old_end - incr.abs() as usize);
 	}
 
 	old_end

x86_64-unknown-hermit-kernel.json

@@ -4,7 +4,7 @@
     "target-endian": "little",
     "target-pointer-width": "64",
     "target-c-int-width" : "32",
-    "os": "none",
+    "os": "hermit",
     "arch": "x86_64",
     "data-layout": "e-m:e-i64:64-f80:128-n8:16:32:64-S128",
     "pre-link-args": {