Add default configuration file

Similar to what we have in other applications, add a default minimal
config file that can be used by `make defconfig` to generate a proper
full configuration.
Also update the Makefile to match the new directory layout.

Signed-off-by: Stefan Jumarea <stefanjumarea02@gmail.com>
Reviewed-by: Razvan Deaconescu <razvand@unikraft.io>
Approved-by: Razvan Deaconescu <razvand@unikraft.io>
Tested-by: Unikraft CI <monkey@unikraft.io>
GitHub-Closes: #22

.config.elfloader_qemu-x86_64

@@ -0,0 +1,241 @@
+#
+# Automatically generated file; DO NOT EDIT.
+# Unikraft/0.13.1~21ce1acf Configuration
+#
+CONFIG_UK_FULLVERSION="0.13.1~21ce1acf"
+CONFIG_UK_CODENAME="Atlas"
+CONFIG_UK_ARCH="x86_64"
+CONFIG_UK_BASE="/tmp/usoc/app-elfloader/.unikraft/unikraft"
+CONFIG_UK_APP="/tmp/usoc/app-elfloader"
+CONFIG_UK_DEFNAME="app-elfloader"
+
+#
+# Architecture Selection
+#
+CONFIG_ARCH_X86_64=y
+CONFIG_MARCH_X86_64_GENERIC=y
+
+#
+# Processor Features
+#
+# end of Processor Features
+
+CONFIG_STACK_SIZE_PAGE_ORDER=4
+# end of Architecture Selection
+
+#
+# Platform Configuration
+#
+CONFIG_PLAT_KVM=y
+CONFIG_KVM_BOOT_PROTO_MULTIBOOT=y
+CONFIG_KVM_VMM_QEMU=y
+
+#
+# Console Options
+#
+CONFIG_KVM_KERNEL_SERIAL_CONSOLE=y
+CONFIG_KVM_KERNEL_VGA_CONSOLE=y
+CONFIG_KVM_DEBUG_SERIAL_CONSOLE=y
+CONFIG_KVM_DEBUG_VGA_CONSOLE=y
+
+#
+# Serial console configuration
+#
+CONFIG_KVM_SERIAL_BAUD_115200=y
+# end of Serial console configuration
+# end of Console Options
+
+CONFIG_KVM_MAX_IRQ_HANDLER_ENTRIES=8
+CONFIG_KVM_PCI=y
+CONFIG_VIRTIO_BUS=y
+
+#
+# Virtio
+#
+CONFIG_VIRTIO_PCI=y
+CONFIG_VIRTIO_NET=y
+CONFIG_VIRTIO_9P=y
+# end of Virtio
+
+CONFIG_UKPLAT_ALLOW_GIC=y
+
+#
+# Platform Interface Options
+#
+CONFIG_UKPLAT_LCPU_MAXCOUNT=1
+CONFIG_PAGING=y
+CONFIG_HAVE_PAGING=y
+CONFIG_HAVE_PAGING_DIRECTMAP=y
+# end of Platform Interface Options
+
+CONFIG_HZ=100
+# end of Platform Configuration
+
+#
+# Library Configuration
+#
+CONFIG_LIB9PFS=y
+CONFIG_LIBISRLIB=y
+CONFIG_LIBNOLIBC=y
+CONFIG_LIBNOLIBC_UKDEBUG_ASSERT=y
+CONFIG_LIBPOSIX_EVENT=y
+CONFIG_LIBPOSIX_FUTEX=y
+CONFIG_LIBPOSIX_MMAP=y
+CONFIG_LIBPOSIX_PROCESS=y
+CONFIG_LIBPOSIX_PROCESS_PIDS=y
+CONFIG_LIBPOSIX_PROCESS_MAX_PID=31
+CONFIG_LIBPOSIX_PROCESS_CLONE=y
+CONFIG_LIBPOSIX_SOCKET=y
+CONFIG_LIBPOSIX_SYSINFO=y
+CONFIG_LIBPOSIX_TIME=y
+CONFIG_LIBPOSIX_USER=y
+CONFIG_LIBSYSCALL_SHIM=y
+CONFIG_LIBSYSCALL_SHIM_HANDLER=y
+CONFIG_LIBSYSCALL_SHIM_HANDLER_ULTLS=y
+
+#
+# Debugging
+#
+CONFIG_LIBSYSCALL_SHIM_LEGACY_VERBOSE=y
+# end of Debugging
+
+CONFIG_LIBUK9P=y
+CONFIG_LIBUK9P_ERRATUM_WSTAT_FSYNC_ZERO=y
+CONFIG_LIBUKALLOC=y
+CONFIG_LIBUKALLOCBBUDDY=y
+CONFIG_LIBUKARGPARSE=y
+CONFIG_LIBUKBOOT=y
+CONFIG_LIBUKBOOT_BANNER_POWEREDBY=y
+CONFIG_LIBUKBOOT_MAXNBARGS=60
+CONFIG_LIBUKBOOT_INITBBUDDY=y
+CONFIG_LIBUKBOOT_HEAP_BASE=0x400000000
+CONFIG_LIBUKBOOT_INITSCHEDCOOP=y
+CONFIG_LIBUKBUS=y
+CONFIG_LIBUKDEBUG=y
+CONFIG_LIBUKDEBUG_PRINTK=y
+CONFIG_LIBUKDEBUG_PRINTK_ERR=y
+CONFIG_LIBUKDEBUG_REDIR_PRINTD=y
+CONFIG_LIBUKDEBUG_PRINT_TIME=y
+CONFIG_LIBUKDEBUG_PRINT_SRCNAME=y
+CONFIG_LIBUKDEBUG_ENABLE_ASSERT=y
+CONFIG_LIBUKFALLOC=y
+CONFIG_LIBUKFALLOCBUDDY=y
+CONFIG_LIBUKFALLOCBUDDY_MAX_ALLOC_ORDER=30
+CONFIG_LIBUKLIBPARAM=y
+CONFIG_LIBUKLOCK=y
+CONFIG_LIBUKLOCK_SEMAPHORE=y
+CONFIG_LIBUKLOCK_MUTEX=y
+CONFIG_LIBUKLOCK_RWLOCK=y
+CONFIG_LIBUKMPI=y
+CONFIG_LIBUKMPI_MBOX=y
+CONFIG_LIBUKNETDEV=y
+CONFIG_LIBUKNETDEV_MAXNBQUEUES=1
+CONFIG_LIBUKNETDEV_DISPATCHERTHREADS=y
+CONFIG_LIBUKSCHED=y
+CONFIG_LIBUKSCHEDCOOP=y
+CONFIG_LIBUKSGLIST=y
+CONFIG_LIBUKSTREAMBUF=y
+CONFIG_LIBUKSWRAND=y
+CONFIG_LIBUKSWRAND_CHACHA=y
+CONFIG_LIBUKSWRAND_INITIALSEED_TIME=y
+CONFIG_LIBUKTIMECONV=y
+CONFIG_LIBUKVMEM=y
+CONFIG_LIBUKVMEM_DEMAND_PAGE_IN_SIZE=12
+CONFIG_LIBUKVMEM_PAGEFAULT_HANDLER_PRIO=4
+CONFIG_LIBUKVMEM_DEFAULT_BASE=0x0000001000000000
+CONFIG_LIBVFSCORE=y
+
+#
+# vfscore: Configuration
+#
+CONFIG_LIBVFSCORE_PIPE_SIZE_ORDER=16
+CONFIG_LIBVFSCORE_AUTOMOUNT_ROOTFS=y
+CONFIG_LIBVFSCORE_ROOTFS_9PFS=y
+CONFIG_LIBVFSCORE_ROOTFS="9pfs"
+CONFIG_LIBVFSCORE_ROOTDEV="fs0"
+CONFIG_LIBVFSCORE_ROOTFLAGS=0x0
+CONFIG_LIBVFSCORE_ROOTOPTS=""
+# end of vfscore: Configuration
+
+CONFIG_HAVE_BOOTENTRY=y
+CONFIG_HAVE_TIME=y
+CONFIG_HAVE_SCHED=y
+CONFIG_HAVE_NW_STACK=y
+CONFIG_HAVE_SYSCALL=y
+CONFIG_LIBELF=y
+CONFIG_LIBLWIP=y
+CONFIG_LWIP_UNIKRAFT21X=y
+
+#
+# Netif drivers
+#
+CONFIG_LWIP_UKNETDEV=y
+CONFIG_LWIP_UKNETDEV_SCRATCH=64
+# end of Netif drivers
+
+CONFIG_LWIP_AUTOIFACE=y
+CONFIG_LWIP_THREADS=y
+CONFIG_LWIP_STACKTHREAD_MBOX_SIZE_256=y
+CONFIG_LWIP_STACKTHREAD_MBOX_SIZE=256
+CONFIG_LWIP_HEAP=y
+CONFIG_LWIP_NETIF_EXT_STATUS_CALLBACK=y
+CONFIG_LWIP_NETIF_STATUS_PRINT=y
+CONFIG_LWIP_LOOPBACK=y
+CONFIG_LWIP_IPV4=y
+
+#
+# IP Configuration
+#
+CONFIG_LWIP_IP_REASS_MAX_PBUFS=10
+# end of IP Configuration
+
+CONFIG_LWIP_UDP=y
+CONFIG_LWIP_TCP=y
+CONFIG_LWIP_TCP_MSS=1460
+CONFIG_LWIP_WND_SCALE=y
+CONFIG_LWIP_NUM_TCPCON=64
+CONFIG_LWIP_NUM_TCPLISTENERS=64
+CONFIG_LWIP_ICMP=y
+CONFIG_LWIP_DNS=y
+CONFIG_LWIP_DNS_MAX_SERVERS=2
+CONFIG_LWIP_DNS_TABLE_SIZE=32
+CONFIG_LWIP_SOCKET=y
+CONFIG_LWIP_UDP_RECVMBOX_FACTOR=2
+CONFIG_LWIP_TCP_RECVMBOX_FACTOR=2
+# end of Library Configuration
+
+#
+# Build Options
+#
+CONFIG_OPTIMIZE_PERF=y
+
+#
+# Hint: Specify a CPU type to get most benefits from performance optimization
+#
+CONFIG_OPTIMIZE_NOOMITFP=y
+CONFIG_DEBUG_SYMBOLS_LVL3=y
+CONFIG_OPTIMIZE_COMPRESS=y
+CONFIG_CROSS_COMPILE=""
+CONFIG_LLVM_TARGET_ARCH=""
+# end of Build Options
+
+#
+# Application Options
+#
+CONFIG_APPELFLOADER_DEPENDENCIES=y
+CONFIG_APPELFLOADER_VFSEXEC=y
+CONFIG_APPELFLOADER_CUSTOMAPPNAME=y
+CONFIG_APPELFLOADER_VFSEXEC_EXECBIT=y
+
+#
+# System call implementations
+#
+CONFIG_APPELFLOADER_BRK=y
+CONFIG_APPELFLOADER_BRK_NBPAGES=512
+CONFIG_APPELFLOADER_ARCH_PRCTL=y
+# end of System call implementations
+
+CONFIG_APPELFLOADER_STACK_NBPAGES=32
+# end of Application Options
+
+CONFIG_UK_NAME="elfloader"

Makefile

@@ -4,8 +4,8 @@ WITH_TLSF       ?= n
 WITH_MUSL       ?= n
 WITH_NEWLIB     ?= n
 
-UK_ROOT  ?= $(PWD)/../../unikraft
-UK_LIBS  ?= $(PWD)/../../libs
+UK_ROOT  ?= $(PWD)/.unikraft/unikraft
+UK_LIBS  ?= $(PWD)/.unikraft/libs
 UK_PLATS ?= $(PWD)/../../plats
 
 LIBS-y                  := $(UK_LIBS)/libelf