add ubuntu20.04 environment support

Author: cc-droid

.gitignore

@@ -0,0 +1,52 @@
+# Prerequisites
+*.d
+
+# Object files
+*.o
+*.ko
+*.obj
+*.elf
+
+# Linker output
+*.ilk
+*.map
+*.exp
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Libraries
+*.lib
+*.a
+*.la
+*.lo
+
+# Shared objects (inc. Windows DLLs)
+*.dll
+*.so
+*.so.*
+*.dylib
+
+# Executables
+*.exe
+*.out
+*.app
+*.i*86
+*.x86_64
+*.hex
+
+# Debug files
+*.dSYM/
+*.su
+*.idb
+*.pdb
+
+# Kernel Module Compile Results
+*.mod*
+*.cmd
+.tmp_versions/
+modules.order
+Module.symvers
+Mkfile.old
+dkms.conf

README.md

@@ -2,7 +2,9 @@
 
 [TOC]
 
-**Config environment can refer this document [envoirnment setup](./doc/Setup-develop-environment.md)**
+**Config environment using Fedora32 can refer this document [envoirnment setup](./doc/Setup-develop-environment.md)**
+
+**for ubuntu20.04, refer this [setup4ubuntu20.04](./doc/Setup-develop-environment_ubuntu20.04.md)**
 
 ## **support architecture now**
 

doc/Setup-develop-environment_ubuntu20.04.md

@@ -0,0 +1,113 @@
+# setup develop enviromment for ubuntu20.04
+
+## preinstall
+
+```shell
+sudo apt install build-essential
+sudo apt install bison
+sudo apt install flex
+sudo apt-get install gconf2
+sudo apt install net-tools
+sudo apt-get install bridge-utils
+sudo apt-get install uml-utilities
+sudo apt-get install libncurses5-dev libncursesw5-dev
+```
+
+## qemu install
+
+```shell
+sudo apt install qemu
+sudo apt install qemu-system
+```
+
+## toolchain install
+
+```shell
+wget https://developer.arm.com/-/media/Files/downloads/gnu-a/9.2-2019.12/binrel/gcc-arm-9.2-2019.12-x86_64-arm-none-linux-gnueabihf.tar.xz 
+sudo tar xvf gcc-arm-9.2-2019.12-x86_64-arm-none-linux-gnueabihf.tar.xz -C /opt
+```
+
+- **environment variables set**
+
+  `sudo vim /etc/profile`
+
+  add `PATH=$PATH:/opt/gcc-arm-9.2-2019.12-x86_64-arm-none-linux-gnueabihf/bin` at tail
+
+- **test toolchain**
+
+  ```shell
+  source /etc/profile`
+  arm-none-linux-gnueabihf-gcc --version
+  ```
+
+  if output as below, succeed:
+
+  > arm-none-linux-gnueabihf-gcc (GNU Toolchain for the A-profile Architecture 9.2-2019.12 (arm-9.10)) 9.2.1 20191025
+
+## network setting
+
+```shell
+sudo brctl addbr br0
+sudo tunctl -u develop -t tap0
+sudo brctl addif br0 tap0
+sudo ifconfig tap0 192.168.1.111 promisc up
+sudo  ifconfig ens33 192.168.1.200 promisc up
+```
+
+## NFS config
+
+```shell
+sudo apt-get install nfs-kernel-server
+vim /etc/exports
+	append /home/develop/develop/v-kernel-qemu/rootfs	192.168.1.100(ro,no_root_squash,sync,nohide) 
+sudo service nfs-kernel-server restart 
+showmount -e
+```
+
+in the qemu linux client:
+
+```shell
+ifconfig eth0 192.168.1.123 promisc up
+mount -t nfs -o nolock 192.168.1.111:/home/develop/develop/v-kernel-qemu/rootfs /mnt
+```
+
+## fixed error
+
+* **libtinfo.so.5**
+
+> ./debug uboot
+> arm-none-linux-gnueabihf-gdb: error while loading shared libraries: libtinfo.so.5: cannot open shared object file: No such file or directory
+
+**fixed:**
+
+```shell
+ls -la /lib/x86_64-linux-gnu/libtinfo.so.*
+lrwxrwxrwx 1 root root     15 May 12 07:00 /lib/x86_64-linux-gnu/libtinfo.so.6 -> libtinfo.so.6.2
+-rw-r--r-- 1 root root 192032 Feb 25 23:14 /lib/x86_64-linux-gnu/libtinfo.so.6.2
+```
+
+`sudo ln -s /lib/x86_64-linux-gnu/libtinfo.so.6.2 /lib/x86_64-linux-gnu/libtinfo.so.5`
+
+* **libncursesw.so.5**
+
+> arm-none-linux-gnueabihf-gdb: error while loading shared libraries: libncursesw.so.5: cannot open shared object file: No such file or directory
+
+**fixed:**
+
+```shell
+develop@ubuntu:~/develop/v-kernel-qemu/shell$ ls -la /lib/x86_64-linux-gnu/libncursesw.*
+lrwxrwxrwx 1 root root     18 May 12 07:00 /lib/x86_64-linux-gnu/libncursesw.so.6 -> libncursesw.so.6.2
+-rw-r--r-- 1 root root 231504 Feb 25 23:14 /lib/x86_64-linux-gnu/libncursesw.so.6.2
+```
+
+`sudo ln -s /lib/x86_64-linux-gnu/libncursesw.so.6.2 /lib/x86_64-linux-gnu/libncursesw.so.5`
+
+* **python2.7**
+
+  > arm-none-linux-gnueabihf-gdb: error while loading shared libraries: libpython2.7.so.1.0: cannot open shared object file: No such file or director
+
+```shell
+sudo apt-get install python2.7
+sudo apt-get install libpython2.7
+```
+

shell/debug

@@ -1,5 +1,7 @@
 #!/bin/bash
 
+source ./global.mk
+
 if [ 0 = $# ]; then
     echo ""
     echo "usage:"
@@ -11,9 +13,9 @@ fi
 
 if [ 1 = $# ]; then
     if [ $1 = "uboot" ]; then
-        arm-none-linux-gnueabihf-gdb -tui -x uboot_arm_gdbinit
+        arm-none-linux-gnueabihf-gdb -tui -x ./uboot_arm_gdbinit
     fi
     if [ $1 = "kernel" ]; then
-        arm-none-linux-gnueabihf-gdb -tui -x kernel_arm_gdbinit
+        arm-none-linux-gnueabihf-gdb -tui -x ./kernel_arm_gdbinit
     fi
 fi

shell/kernel_arm_gdbinit

@@ -1,2 +1,2 @@
- file /home/develop/vexpress-a9/src/linux-5.6.11/vmlinux
+ file ../src/linux-5.6.11/vmlinux
  target remote 127.0.0.1:1234

shell/rootfs_build.sh

@@ -14,7 +14,7 @@ fi
 # 1.先进行清理操作
 sudo rm -rf rootfs
 sudo rm -rf tmpfs
-
+sudo mkdir images
 sudo mkdir rootfs
 # 2.创建Linux中的必要文件夹
 sudo mkdir -p rootfs/bin # /bin包含普通用户和超级用户都能使用的命令
@@ -58,5 +58,5 @@ sudo mount -t ext3 rootfs.ext3 tmpfs/ -o loop
 # 8.将之前创建的文件系统相关的文件放到通过tmpfs放到rootfs.ext3文件系统中去
 sudo cp -r rootfs/*  tmpfs/
 sudo umount tmpfs
-mv rootfs.ext3 $IMAGE_DIR
+sudo mv rootfs.ext3 $IMAGE_DIR
 sudo rm -rf tmpfs

shell/setup_net4ubuntu20.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+sudo brctl addbr br0
+sudo tunctl -u develop -t tap0
+sudo ifconfig tap0 192.168.1.111 promisc up
+sudo  ifconfig ens33 192.168.1.100 promisc up

shell/uboot_arm_gdbinit

@@ -1,2 +1,3 @@
- target remote 127.0.0.1:1234
- file /home/develop/vexpress-a9/src/u-boot-2020.04/u-boot
+#!/bin/bash
+target remote 127.0.0.1:1234
+file ../src/u-boot-2020.04/u-boot