Kernel: Move sys_fork trampolines to kernel/arch/ directory

kernel/CMakeLists.txt

@@ -83,7 +83,6 @@ set(KERNEL_SOURCES
 	kernel/Storage/Partition.cpp
 	kernel/Storage/StorageDevice.cpp
 	kernel/Syscall.cpp
-	kernel/Syscall.S
 	kernel/Terminal/FramebufferTerminal.cpp
 	kernel/Terminal/Serial.cpp
 	kernel/Terminal/TTY.cpp
@@ -111,6 +110,7 @@ if("${BANAN_ARCH}" STREQUAL "x86_64")
 		arch/x86_64/interrupts.S
 		arch/x86_64/PageTable.cpp
 		arch/x86_64/Signal.S
+		arch/x86_64/Syscall.S
 		arch/x86_64/Thread.S
 	)
 elseif("${BANAN_ARCH}" STREQUAL "i386")
@@ -118,6 +118,7 @@ elseif("${BANAN_ARCH}" STREQUAL "i386")
 		${KERNEL_SOURCES}
 		arch/i386/boot.S
 		arch/i386/SpinLock.S
+		arch/i386/Syscall.S
 		arch/i386/Thread.S
 	)
 else()

kernel/arch/i386/Syscall.S

@@ -0,0 +1,18 @@
+.global sys_fork_trampoline
+sys_fork_trampoline:
+	subl $4, %esp
+	pushl %ebx
+	pushl %ebp
+	call read_rip
+	testl %eax, %eax
+	je .done
+	subl $8, %esp
+	pushl %eax
+	pushl %esp
+	call sys_fork
+	addl $16, %esp
+.done:
+	popl %ebp
+	popl %ebx
+	addl $4, %esp
+	ret