feat(sys): add malloc

CMakeLists.txt

@@ -21,7 +21,8 @@ add_library(
   sys STATIC
   ${CMAKE_CURRENT_SOURCE_DIR}/src/sys/entry.s
   ${CMAKE_CURRENT_SOURCE_DIR}/src/sys/syscall.s
-  ${CMAKE_CURRENT_SOURCE_DIR}/src/sys/syscall.c)
+  ${CMAKE_CURRENT_SOURCE_DIR}/src/sys/syscall.c
+  ${CMAKE_CURRENT_SOURCE_DIR}/src/sys/memory.c)
 target_include_directories(
   sys PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
              $<INSTALL_INTERFACE:include>)
@@ -29,8 +30,9 @@ target_include_directories(
 add_executable(nolibc ${CMAKE_CURRENT_SOURCE_DIR}/app/nolibc.c)
 target_link_libraries(nolibc PRIVATE sys)
 target_compile_options(
-  nolibc PRIVATE -fno-asynchronous-unwind-tables -fno-unwind-tables
-                 -fno-stack-protector -ffunction-sections -fdata-sections)
+  nolibc
+  PRIVATE -fno-asynchronous-unwind-tables -fno-unwind-tables
+          -fno-stack-protector -ffunction-sections -fdata-sections -fno-builtin)
 target_link_options(
   nolibc
   PRIVATE