feat: initial booting kernel, copy libc stuff from myke

2023-03-22 21:02:22 +01:00
parent 591b6d61c5
commit 61fb439d72
26 changed files with 791 additions and 220 deletions
--- a/yak-kernel/CMakeLists.txt
+++ b/yak-kernel/CMakeLists.txt
@@ -1,27 +1,57 @@
 project(yak-kernel)

-set(CMAKE_C_FLAGS "
-    -ffreestanding       \
-    -fno-stack-protector \
-    -fno-stack-check     \
-    -fno-lto             \
-    -fno-pie             \
-    -fno-pic             \
-    -m64                 \
-    -march=x86-64        \
-    -mabi=sysv           \
-    -mno-80387           \
-    -mno-mmx             \
-    -mno-sse             \
-    -mno-sse2            \
-    -mno-red-zone        \
-    -mcmodel=kernel")
-set(CMAKE_EXE_LINKER_FLAGS "
-    -nostdlib               \
-    -static                 \
-    -z max-page-size=0x1000 \
-    -T ${CMAKE_CURRENT_SOURCE_DIR}/linker.lds")
+set(CMAKE_SYSROOT "/does-not-exist")

-include_directories(../limine/include)
+option(USE_LIMINE "Enable support for the limine boot protocol" ON)

-add_executable(yak.elf main.c)
+add_compile_options(
+        -ffreestanding
+        -fno-lto
+        -fno-pie
+        -fno-pic
+        -m64
+        --target=x86_64-pc-none-eabi
+        -mno-80387
+        -mno-mmx
+        -mno-sse
+        -mno-sse2
+        -mno-red-zone
+        -mcmodel=kernel
+)
+add_link_options(
+        -nostdlib
+        -static
+        -z max-page-size=0x1000
+        -T ${CMAKE_CURRENT_SOURCE_DIR}/linker.lds
+)
+
+FetchContent_Declare(printf_library
+        GIT_REPOSITORY https://github.com/eyalroz/printf.git
+        GIT_TAG v6.1.0)
+FetchContent_GetProperties(printf_library)
+if (NOT printf_library_POPULATED)
+    FetchContent_Populate(printf_library)
+endif ()
+
+
+if (NOT ${USE_LIMINE})
+    message(FATAL_ERROR "At least one boot protocol is required")
+endif ()
+
+file(GLOB KERNEL_SOURCES src/rt/*.c src/ulibc/*.c)
+file(GLOB PLATFORM_GENERIC_SOURCES src/platform/generic/*.c)
+
+if (${USE_LIMINE})
+    file(GLOB LIMINE_KERNEL_SOURCES src/rt/limine/*.c)
+endif ()
+if (NOT IS_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/src/platform/${CMAKE_SYSTEM_PROCESSOR})
+    message(FATAL_ERROR "Unknown architecture ${CMAKE_CURRENT_SOURCE_DIR}/src/platform/${CMAKE_SYSTEM_PROCESSOR}")
+endif ()
+
+file(GLOB PLATFORM_SPECIFIC_SOURCES src/platform/x86_64/*.c)
+
+set(KERNEL_SOURCE_FILES ${KERNEL_SOURCES} ${LIMINE_KERNEL_SOURCES} ${PLATFORM_GENERIC_SOURCES} ${PLATFORM_SPECIFIC_SOURCES})
+
+add_executable(yak.elf ${KERNEL_SOURCE_FILES})
+target_link_libraries(yak.elf PRIVATE /usr/lib/clang/15.0.7/lib/linux/libclang_rt.builtins-x86_64.a)
+target_include_directories(yak.elf PRIVATE include ../limine/include ${printf_library_SOURCE_DIR}/src)# ${printf_library_SOURCE_DIR}/src)