misc: changes from a long time ago

arch/x86_64/targets.cmake

@@ -1,7 +1,21 @@
 find_program(QEMU qemu-system-x86_64)
+set(DEBUG_SESSION ${CMAKE_SOURCE_DIR}/tools/kernel-debug/debug_session.sh)
+set(DEBUG_CFG_GDB ${CMAKE_SOURCE_DIR}/tools/kernel-debug/gdb_session_init)
+set(DEBUG_CFG_LLDB ${CMAKE_SOURCE_DIR}/tools/kernel-debug/lldb_session_init)
 
 add_custom_target(run
 	USES_TERMINAL
 	COMMAND ${QEMU}
 		-kernel $<TARGET_FILE:${kernel_exe_name}>
 		-serial stdio)
+
+# LLDB DEPENDS ON AN ELF64 EXECUTABLE.
+# .DBG FILE MUST NOT BE PATCHED WITH E64PATCH!
+add_custom_target(debug
+	USES_TERMINAL
+	COMMAND ${DEBUG_SESSION}
+		${DEBUG_CFG_GDB}
+		${DEBUG_CFG_LLDB}
+		${QEMU} -kernel $<TARGET_FILE:${kernel_exe_name}>
+			-S -s
+			-monitor stdio)