first user application

run.sh

@@ -3,14 +3,19 @@ set -xue
 
 # QEMU path
 QEMU=qemu-system-riscv32
+OBJCOPY=/usr/bin/llvm-objcopy
 
 # Path to clang and compiler flags
 CC=clang
 CFLAGS="-std=c11 -O2 -g3 -Wall -Wextra --target=riscv32-unknown-elf -fno-stack-protector -ffreestanding -nostdlib"
 
+$CC $CFLAGS -Wl,-Tuser.ld -Wl,-Map=shell.map -o shell.elf shell.c user.c common.c 
+$OBJCOPY --set-section-flags .bss=alloc,contents -O binary shell.elf shell.bin
+$OBJCOPY -Ibinary -Oelf32-littleriscv shell.bin shell.bin.o
+
 # Build the kernel
 $CC $CFLAGS -Wl,-Tkernel.ld -Wl,-Map=kernel.map -o kernel.elf \
-    kernel.c common.c
+    kernel.c common.c shell.bin.o
 
 # Start QEMU
 $QEMU -machine virt -bios default -nographic -serial mon:stdio --no-reboot \