1 files changed, 48 insertions, 0 deletions

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..bd21c45
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,48 @@
+# =============================================================================
+# Makefile — rsbl (UEFI bootloader for RNG)
+#
+# Produces build/bootloader/BOOTX64.EFI (PE32+ for UEFI)
+#
+# Uses -fPIE for position-independent code so the image works at any
+# load address.  The Optiplex 7010 firmware ignores ImageBase + relocs,
+# so RELOCS_STRIPPED + padding to ~160KB is required.
+# =============================================================================
+
+BUILD_DIR  = ../build/bootloader
+CC         = gcc
+LD         = ld
+OBJCOPY    = objcopy
+
+CFLAGS = -m64 -ffreestanding -nostdinc -nostartfiles -nodefaultlibs   \
+         -fno-builtin -fno-stack-protector -fPIE -fPIC                \
+         -fshort-wchar -mno-red-zone -mabi=ms -Qn                    \
+         -fno-asynchronous-unwind-tables -fno-unwind-tables           \
+         -fno-exceptions                                               \
+         -I. -Wall -Wextra -Werror
+
+LDFLAGS = -m elf_x86_64 -nostdlib -z norelro --no-dynamic-linker      \
+          -Ttext=0x1000 -e efi_main
+
+.PHONY: all clean
+
+all: $(BUILD_DIR)/BOOTX64.EFI
+
+$(BUILD_DIR)/BOOTX64.EFI: main.elf
+        @mkdir -p $(BUILD_DIR)
+        $(OBJCOPY) -O pei-x86-64 --subsystem=10:1.1 \
+          --heap 0x100000,0x1000 \
+          --stack 0x100000,0x1000 \
+          $< $@
+        python3 fix_pe_simple.py $@
+        python3 pad_for_optiplex.py $@
+        @echo "  -> $@"
+        @ls -lh $@
+
+main.elf: main.o
+        $(LD) $(LDFLAGS) -o "$@" "$^"
+
+main.o: main.c uefi.h
+        $(CC) $(CFLAGS) -c -o "$@" "$<"
+
+clean:
+        rm -f *.o *.elf $(BUILD_DIR)/BOOTX64.EFI