Fixed tests, using cargo test

The various changes over the last year or so broke testing with
cargo xtest, but we can now use cargo test instead.

Note that we had to remove the (admittedly redundant) declarations
of `panic = "abort"` in both `dev` and `release` profiles in
Cargo.toml, thanks to rust-lang/cargo#7359.

The only thing left is the repeated deprecation warning from
bootloader, tracked in rust-osdev/bootloader#107,
which needs to be reopend at time of writing.

Signed-off-by: SlyMarbo <[email protected]>

Author: SlyMarbo

kernel/Cargo.toml

@@ -14,19 +14,11 @@ uart_16550 = "=0.2.15"
 volatile = "=0.2.6"
 x86_64 = "=0.14.6"
 
-[profile.dev]
-panic = "abort"
-
-[profile.release]
-panic = "abort"
-
 [package.metadata.bootimage]
 test-success-exit-code = 33    # (0x10 << 1) | 1
 test-timeout = 300             # (in seconds)
 test-args = [
-	"-device", "isa-debug-exit,iobase=0xf4,iosize=0x04",
-	"-serial", "stdio",
-	"-display", "none"
+	"-device", "isa-debug-exit,iobase=0xf4,iosize=0x04"
 ]
 run-command = [
 	"qemu-system-x86_64",

kernel/test

@@ -9,7 +9,7 @@ use x86_64::structures::idt::InterruptDescriptorTable;
 use x86_64::structures::idt::InterruptStackFrame;
 
 extern "x86-interrupt" fn test_double_fault_handler(
-    _stack_frame: &mut InterruptStackFrame,
+    _stack_frame: InterruptStackFrame,
     _error_code: u64,
 ) -> ! {
     println!("[ok]");