Kernel: Cleanup signal trampoline

kernel/CMakeLists.txt

@@ -46,7 +46,6 @@ set(KERNEL_SOURCES
 	kernel/Scheduler.cpp
 	kernel/Semaphore.cpp
 	kernel/Serial.cpp
-	kernel/Signal.cpp
 	kernel/SpinLock.cpp
 	kernel/SSP.cpp
 	kernel/Storage/ATABus.cpp

kernel/arch/x86_64/Signal.S

@@ -1,5 +1,7 @@
 .section .userspace, "aw"
 
+#include <sys/syscall.h>
+
 .global signal_trampoline
 signal_trampoline:
 	pushq %rax
@@ -18,14 +20,13 @@ signal_trampoline:
 	pushq %r14
 	pushq %r15
 
-	xchgw %bx, %bx
-
 	movq 128(%rsp), %rdi
 	movq 120(%rsp), %rax
 	call *%rax
 
-	movq 128(%rsp), %rdi
-	call signal_done
+	movq $SYS_SIGNAL_DONE, %rax
+	movq 128(%rsp), %rbx
+	int $0x80
 
 	popq %r15
 	popq %r14

kernel/kernel/Signal.cpp

@@ -1,8 +0,0 @@
-#include <sys/syscall.h>
-#include <kernel/Syscall.h>
-
-extern "C" __attribute__((section(".userspace")))
-void signal_done(int signal)
-{
-	Kernel::syscall(SYS_SIGNAL_DONE, signal);
-}