feat: Add Process Manager, Limine Framebuffer GUI, RTL8139 Net stack, and extended UNIX commands

Makefile

@@ -24,7 +24,7 @@ LIMINE_DIR  := boot/limine
 COMMON_FLAGS := -Wall -Wextra -O2 -ffreestanding -fno-stack-protector \
                 -fno-pie -no-pie -mno-red-zone -m64 \
                 -mno-sse -mno-sse2 -mno-avx \
-                -I$(INCLUDE_DIR) -I$(LIB_DIR)/libc/include
+                -I$(INCLUDE_DIR) -I$(LIB_DIR)/libc/include -I$(HAL_DIR)/include
 
 CFLAGS   := $(COMMON_FLAGS) -std=c11
 CXXFLAGS := $(COMMON_FLAGS) -std=c++20 -fno-exceptions -fno-rtti -I$(LIB_DIR)/libipc_cpp/include
@@ -39,6 +39,7 @@ PROCMGR      := $(BUILD_DIR)/procmgr.elf
 DISK_IMG     := $(BUILD_DIR)/opencoreC.img
 
 LIBC_OBJS    := $(BUILD_DIR)/string.o $(BUILD_DIR)/syscalls.o $(BUILD_DIR)/stdlib.o
+NET_OBJS     := $(BUILD_DIR)/net.o $(BUILD_DIR)/rtl8139.o $(BUILD_DIR)/pci.o
 
 .PHONY: all kernel libc hal servers image run clean help limine-setup
 
@@ -48,7 +49,7 @@ all: kernel libc hal servers
 	@echo "======================================================="
 	@echo " [SUCCESS] opencoreC Build Complete!"
 	@echo " Kernel:   $(KERNEL_ELF)"
-	@echo " Servers:  $(INIT_SERVER), $(UART_DRIVER), $(SH_SERVER)"
+	@echo " Servers:  $(INIT_SERVER), $(UART_DRIVER), $(SH_SERVER), $(PROCMGR)"
 	@echo " Run:      make image && make run"
 	@echo "======================================================="
 
@@ -63,6 +64,7 @@ libc:
 	@$(CC) $(CFLAGS) -c $(LIB_DIR)/libc/src/string.c -o $(BUILD_DIR)/string.o
 	@$(CC) $(CFLAGS) -c $(LIB_DIR)/libc/src/syscalls.c -o $(BUILD_DIR)/syscalls.o
 	@$(CC) $(CFLAGS) -c $(LIB_DIR)/libc/src/stdlib.c -o $(BUILD_DIR)/stdlib.o
+	@$(CC) $(CFLAGS) -c $(LIB_DIR)/libc/src/net.c -o $(BUILD_DIR)/net.o
 
 hal: libc
 	@mkdir -p $(BUILD_DIR)
@@ -70,6 +72,8 @@ hal: libc
 	@$(CC) $(CFLAGS) -I$(HAL_DIR)/include -c $(HAL_DIR)/src/uart.c -o $(BUILD_DIR)/uart.o
 	@$(CC) $(CFLAGS) -I$(HAL_DIR)/include -c $(HAL_DIR)/src/pci.c -o $(BUILD_DIR)/pci.o
 	@$(CC) $(CFLAGS) -I$(HAL_DIR)/include -c $(HAL_DIR)/src/apic.c -o $(BUILD_DIR)/apic.o
+	@$(CC) $(CFLAGS) -I$(HAL_DIR)/include -c $(HAL_DIR)/src/fb.c -o $(BUILD_DIR)/fb.o
+	@$(CC) $(CFLAGS) -I$(HAL_DIR)/include -c $(HAL_DIR)/src/rtl8139.c -o $(BUILD_DIR)/rtl8139.o
 
 servers: libc hal
 	@mkdir -p $(BUILD_DIR)
@@ -84,10 +88,10 @@ servers: libc hal
 	@$(CC) $(CFLAGS) -I$(HAL_DIR)/include -c $(SERVERS_DIR)/uart_driver/main.c -o $(BUILD_DIR)/uart_driver_main.o
 	@$(LD) -T $(CONFIG_DIR)/user.ld -nostdlib -static -o $(UART_DRIVER) \
 		$(BUILD_DIR)/uart_driver_main.o $(BUILD_DIR)/uart.o $(LIBC_OBJS)
-	@# Interactive Shell
+	@# Interactive Shell with Networking & Framebuffer
 	@$(CXX) $(CXXFLAGS) -c $(SERVERS_DIR)/sh/main.cpp -o $(BUILD_DIR)/sh_main.o
 	@$(LD) -T $(CONFIG_DIR)/user.ld -nostdlib -static -o $(SH_SERVER) \
-		$(BUILD_DIR)/sh_main.o $(BUILD_DIR)/ipc.o $(LIBC_OBJS)
+		$(BUILD_DIR)/sh_main.o $(BUILD_DIR)/ipc.o $(BUILD_DIR)/fb.o $(NET_OBJS) $(LIBC_OBJS)
 	@# Process Manager Daemon
 	@$(CXX) $(CXXFLAGS) -c $(SERVERS_DIR)/procmgr/main.cpp -o $(BUILD_DIR)/procmgr_main.o
 	@$(LD) -T $(CONFIG_DIR)/user.ld -nostdlib -static -o $(PROCMGR) \
@@ -114,6 +118,7 @@ image: all limine-setup
 	@mcopy -i $(DISK_IMG)@@1M $(INIT_SERVER)  ::/boot/
 	@mcopy -i $(DISK_IMG)@@1M $(UART_DRIVER)  ::/boot/
 	@mcopy -i $(DISK_IMG)@@1M $(SH_SERVER)    ::/boot/
+	@mcopy -i $(DISK_IMG)@@1M $(PROCMGR)      ::/boot/
 	@# Bootloader config
 	@mcopy -i $(DISK_IMG)@@1M limine.conf ::/
 	@mcopy -i $(DISK_IMG)@@1M limine.cfg  ::/
@@ -127,15 +132,18 @@ image: all limine-setup
 	@$(LIMINE_DIR)/limine bios-install $(DISK_IMG) 2>&1 | grep -v "^Physical\|^Installing\|^Stage\|^Reminder"
 	@echo "[IMAGE] Done: $(DISK_IMG) (BIOS + UEFI bootable)"
 
-# Launch QEMU with serial terminal (keyboard works via -serial stdio)
+# Launch QEMU with serial terminal, VGA framebuffer, and RTL8139 network card
 run: image
-	@echo "[QEMU] Launching opencoreC (SMP 4 cores, Serial terminal)..."
+	@echo "[QEMU] Launching opencoreC (SMP 4 cores, Serial terminal, Framebuffer, RTL8139 Net)..."
 	@echo "[QEMU] Type 'help' for commands. Ctrl+A X to exit QEMU."
 	@echo "-------------------------------------------------------"
 	@$(QEMU) \
 		-M q35 \
 		-smp 4 \
 		-m 512M \
+		-vga std \
+		-netdev user,id=net0 \
+		-device rtl8139,netdev=net0 \
 		-serial mon:stdio \
 		-no-reboot \
 		-display none \
@@ -145,7 +153,8 @@ run: image
 qemu: $(DISK_IMG)
 	@echo "[QEMU] Quick launch from existing image..."
 	@echo "[QEMU] Type 'help'. Ctrl+A X to exit."
-	@$(QEMU) -M q35 -smp 4 -m 512M -serial mon:stdio -no-reboot -display none \
+	@$(QEMU) -M q35 -smp 4 -m 512M -vga std -netdev user,id=net0 -device rtl8139,netdev=net0 \
+		-serial mon:stdio -no-reboot -display none \
 		-drive file=$(DISK_IMG),format=raw
 
 clean: