Merge branch 'panic_abort' into 'master'

Build the kernel with panic=abort

See merge request redox-os/kernel!229

.cargo/config

@@ -6,4 +6,3 @@ rustflags = [
 
 [unstable]
 build-std = ["core", "alloc", "compiler_builtins"]
-build-std-features = ["panic-unwind"]

Cargo.toml

@@ -61,8 +61,14 @@ slab = ["slab_allocator"]
 x86_fsgsbase = []
 
 [profile.dev]
+# Avoids having to define the eh_personality lang item and reduces kernel size
+panic = "abort"
+
 # Kernel doesn't yet work great with debug mode :(
 opt-level = 3
 
 [profile.release]
+# Avoids having to define the eh_personality lang item and reduces kernel size
+panic = "abort"
+
 lto = true

src/lib.rs

@@ -50,7 +50,6 @@
 #![feature(concat_idents)]
 #![feature(core_intrinsics)]
 #![feature(integer_atomics)]
-#![feature(lang_items)]
 #![feature(naked_functions)]
 #![feature(ptr_internals)]
 #![feature(slice_ptr_get, slice_ptr_len)]

src/panic.rs

@@ -5,10 +5,6 @@ use core::panic::PanicInfo;
 
 use crate::{cpu_id, context, interrupt, syscall};
 
-#[lang = "eh_personality"]
-#[no_mangle]
-pub extern "C" fn rust_eh_personality() {}
-
 /// Required to handle panics
 #[panic_handler]
 #[no_mangle]
@@ -44,12 +40,3 @@ pub extern "C" fn rust_begin_unwind(info: &PanicInfo) -> ! {
 pub extern fn rust_oom(_layout: Layout) -> ! {
     panic!("kernel memory allocation failed");
 }
-
-#[allow(non_snake_case)]
-#[no_mangle]
-/// Required to handle panics
-pub extern "C" fn _Unwind_Resume() -> ! {
-    loop {
-        unsafe { interrupt::halt(); }
-    }
-}