linux驅動筆記——環境搭建1

1， 安裝 Module-Init-Tools

Module-Init-Tools 的內容

安裝的程式：depmod, insmod, insmod.static, lsmod (連結到 insmod), modinfo, modprobe (連結到 insmod), rmmod (連結到 insmod)簡要描述

depmod	建立一個可載入核心模組的依賴關係檔案，modprobe 用它來自動載入模組。
insmod	向正在啟動並執行核心載入模組
insmod.static	insmod 的靜態編譯版本
lsmod	顯示當前已載入的核心模組資訊
modinfo	檢查與核心模組相關聯的目標檔案，並列印出所有能得到的資訊。
modprobe	利用 depmod 建立的依賴關係檔案來自動載入相關的模組
rmmod	從當前啟動並執行核心中卸載模組

 

2，需要升級modutils

#rpm -e --nodeps modutils （強行卸載原有的modutilsRPM包）
#rpm -ivh modutils-2.4.21-23.src.rpm （把原始碼包安裝到了/usr/src/redflag/目錄下［我電腦系統是紅旗Linux］）

   1:modutils               warning: user kaos does not exist - using root
warning: group ocs does not exist - using root
########################################### [100%]
warning: user kaos does not exist - using root
warning: group ocs does not exist - using root
#cd /usr/src/redhat/SPECS （進入規範檔案目錄下）

到這裡為止，一切都順利！
#rpmbuild --bb modutils.spec （產生二進位的RPM包）

執行完這命令後，問題就開始了... ...

報錯：

error: Legacy syntax is unsupported: copyright
error: line 5: Unknown tag: Copyright: GPL

上網查了一下資料，把modutils.spec裡邊的第5行

            Copyright: GPL    改成 License:GPL

OK , RPM檔案開始編譯了，可沒有多久就報錯了

In file included from obj_kallsyms.c:26:
./../include/util.h:42: warning: built-in function ‘log’ declared as non-function
obj_kallsyms.c: In function ‘obj32_kallsyms’:
obj_kallsyms.c:204: error: lvalue required as left operand of assignment
obj_kallsyms.c:279: error: lvalue required as left operand of assignment
make[1]: *** [obj_kallsyms.o] 錯誤 1
make[1]: Leaving directory `/usr/src/redflag/BUILD/modutils-2.4.27/obj'
make: *** [all] 錯誤 2

將obj_kallsyms.c檔案修改如下

將204行的

  a_hdr = (struct kallsyms_header *) osec->contents =
     xmalloc(osec->header.sh_size);

改成
  osec->contents = xmalloc(osec->header.sh_size);
  a_hdr = (struct kallsyms_header *) osec->contents;

將279行的

  a_hdr = (struct kallsyms_header *) osec->contents =
    xrealloc(a_hdr, a_hdr->total_size);

改成
  osec->contents = xrealloc(a_hdr, a_hdr->total_size);
  a_hdr = (struct kallsyms_header *) osec->contents;

然後將改動壓縮回../SOURCES/modutils-2.4.27.tar.gz,在壓縮包裡

邊直接改動，是不允許儲存的，所以要先解壓縮，改動後，壓縮回去進行覆蓋，

以下都是如此做法，不再重複。然後繼續。

報錯：

In file included from insmod.c:79:
./../include/util.h:42: warning: built-in function ‘log’ declared as non-function
insmod.c: In function ‘add_symbols_from’:
insmod.c:278: error: lvalue required as left operand of assignment
make[1]: *** [insmod.o] 錯誤 1
make[1]: Leaving directory `/usr/src/redflag/BUILD/modutils-2.4.27/insmod'
make: *** [all] 錯誤 2
error: Bad exit status from /var/tmp/rpm-tmp.36012 (%build)
將insmod.c檔案的第278行

        ((char *)s->name) += 8;

改成

     s->name = (void *)((long)(s->name)+8);

再繼續編譯，

繼續報錯：

In file included from genksyms.c:32:
./../include/util.h:42: warning: built-in function ‘log’ declared as non-function
genksyms.c:48: error: static declaration of ‘errors’ follows non-static declaration
./../include/util.h:43: error: previous declaration of ‘errors’ was here
make[1]: *** [genksyms.o] 錯誤 1
make[1]: Leaving directory `/usr/src/redflag/BUILD/modutils-2.4.27/genksyms'
make: *** [all] 錯誤 2
error: Bad exit status from /var/tmp/rpm-tmp.97956 (%build)
將genksyms.c第48行的語句

               static int errors;

static去掉，

繼續報錯：

In file included from depmod.c:44:
./../include/util.h:42: warning: built-in function ‘log’ declared as non-function
depmod.c: In function ‘addksyms’:
depmod.c:1136: error: lvalue required as left operand of assignment
make[1]: *** [depmod.o] 錯誤 1
make[1]: Leaving directory `/usr/src/redflag/BUILD/modutils-2.4.27/depmod'
make: *** [all] 錯誤 2
error: Bad exit status from /var/tmp/rpm-tmp.36319 (%build)
將depmod.c的第1136行

               ((char *)ksym->name) += 8;

改成
                ksym->name = (void *)((long)(ksym->name)+8);

繼續... ...

Requires(rpmlib): rpmlib(CompressedFileNames) <= 3.0.4-1 rpmlib(PayloadFilesHavePrefix) <= 4.0-1
Requires: /bin/sh libc.so.6 libc.so.6(GLIBC_2.0) libc.so.6(GLIBC_2.1) libc.so.6(GLIBC_2.1.3) libc.so.6(GLIBC_2.3)
Checking for unpackaged file(s): /usr/lib/rpm/check-files /var/tmp/modutils-root
warning: Installed (but unpackaged) file(s) found:
   /sbin/kallsyms.static
   /sbin/ksyms.static
   /sbin/lsmod.static
   /sbin/modprobe.static
   /sbin/rmmod.static
Wrote: /usr/src/redflag/RPMS/i386/modutils-2.4.27-1.i386.rpm
Executing(%clean): /bin/sh -e /var/tmp/rpm-tmp.85202
+ umask 022
+ cd /usr/src/redflag/BUILD
+ cd modutils-2.4.27
+ rm -rf /var/tmp/modutils-root
+ exit 0
OK,終於編過去了，好累！！！

#cd ../RPMS/i386 （轉入剛產生的二進位的RPM包所在位置）

#rpm -ivh modutils*.rpm

Preparing...                ########################################### [100%]
        file /usr/share/man/man2/delete_module.2.gz from install of modutils-2.4.27-1 conflicts with file from package man-pages-2.21-4
        file /usr/share/man/man2/init_module.2.gz from install of modutils-2.4.27-1 conflicts with file from package man-pages-2.21-4
        file /sbin/depmod from install of modutils-2.4.27-1 conflicts with file from package module-init-tools-3.2-0.pre9.2.2.2
        file /sbin/insmod from install of modutils-2.4.27-1 conflicts with file from package module-init-tools-3.2-0.pre9.2.2.2
        file /sbin/insmod.static from install of modutils-2.4.27-1 conflicts with file from package module-init-tools-3.2-0.pre9.2.2.2
        file /sbin/lsmod from install of modutils-2.4.27-1 conflicts with file from package module-init-tools-3.2-0.pre9.2.2.2
        file /sbin/modinfo from install of modutils-2.4.27-1 conflicts with file from package module-init-tools-3.2-0.pre9.2.2.2
        file /sbin/modprobe from install of modutils-2.4.27-1 conflicts with file from package module-init-tools-3.2-0.pre9.2.2.2
        file /sbin/rmmod from install of modutils-2.4.27-1 conflicts with file from package module-init-tools-3.2-0.pre9.2.2.2
        file /usr/share/man/man8/depmod.8.gz from install of modutils-2.4.27-1 conflicts with file from package module-init-tools-3.2-0.pre9.2.2.2
        file /usr/share/man/man8/insmod.8.gz from install of modutils-2.4.27-1 conflicts with file from package module-init-tools-3.2-0.pre9.2.2.2
        file /usr/share/man/man8/lsmod.8.gz from install of modutils-2.4.27-1 conflicts with file from package module-init-tools-3.2-0.pre9.2.2.2
        file /usr/share/man/man8/modinfo.8.gz from install of modutils-2.4.27-1 conflicts with file from package module-init-tools-3.2-0.pre9.2.2.2
        file /usr/share/man/man8/modprobe.8.gz from install of modutils-2.4.27-1 conflicts with file from package module-init-tools-3.2-0.pre9.2.2.2
        file /usr/share/man/man8/rmmod.8.gz from install of modutils-2.4.27-1 conflicts with file from package module-init-tools-3.2-0.pre9.2.2.2
安裝之前產生的RPM，從上邊提示來看，我電腦上已有的設定跟RPM包有一些衝突，可能是因為電腦本身的核心版本就很高，跟modultils-2.4有不一致的地方。不知道對後面編譯核心有沒有影響，這個放到後面再說吧。本來想找 modultils-2.6，哪知連www,kernel.org網站都找不著，之好用所看到最新的modultils-2.4.27了

3，終於可以使用 /sbin/insmod 和 /sbin/rmmod 向核心載入卸載驅動了 

[root@localhost simple]# ll /sbin/insmod /sbin/rmmod
-rwxr-xr-x 1 root root 4924 2007-09-05 /sbin/insmod
-rwxr-xr-x 1 root root 8264 2007-09-05 /sbin/rmmod

把insmod和rmmod分別當成一個單獨的可執行檔來看待