Rewrite core of the XTLDR boot loader

Reviewed-on: #7
Reviewed-by: Piotr Likoski <likoski@noreply.codingworkshop.git>
Co-authored-by: Rafal Kupiec <belliash@codingworkshop.eu.org>
Co-committed-by: Rafal Kupiec <belliash@codingworkshop.eu.org>

xtldr/modules/pecoff_o/CMakeLists.txt

@@ -0,0 +1,26 @@
+# XT Boot Loader
+PROJECT(XTLDR_PECOFF_O)
+
+# Specify include directories
+include_directories(
+    ${EXECTOS_SOURCE_DIR}/sdk/xtdk
+    ${XTLDR_PECOFF_O_SOURCE_DIR}/includes)
+
+# Specify list of source code files
+list(APPEND XTLDR_PECOFF_O_SOURCE
+    ${XTLDR_PECOFF_O_SOURCE_DIR}/pecoff.c)
+
+# Link bootloader executable
+add_executable(pecoff_o ${XTLDR_PECOFF_O_SOURCE})
+
+# Add linker libraries
+target_link_libraries(pecoff_o libxtos libxtldr)
+
+# Set proper binary name and install target
+set_target_properties(pecoff_o PROPERTIES SUFFIX .efi)
+set_install_target(pecoff_o efi/boot/xtldr/modules)
+
+# Set module entrypoint and subsystem
+set_entrypoint(pecoff_o "XtLdrModuleMain")
+set_linker_map(pecoff_o TRUE)
+set_subsystem(pecoff_o efi_boot_service_driver)