add-symbol-file不支持64bit？

chishanmingshen

LDD3上介绍的gdb查看ko方法

(gdb) add-symbol-file demo.ko 0xffffffffa04b1000 -s .symtab 0xffffffffa002a000
add symbol table from file "demo.ko" at
        .text_addr = 0xa04b1000
        .symtab_addr = 0xa002a000
(y or n) y
Reading symbols from /home/demo.ko...warning: section .symtab not found in /home/demo.ko
done.

2个问题：
1)64bit地址咋显示为32bit了
2)符号表加载失败

(该ko确实是有debug信息的)

请大家指点，谢谢！

humjb_1983

像是gdb的问题，升级试试？

chishanmingshen

回复 2# humjb_1983


GNU gdb (Ubuntu/Linaro 7.4-2012.04-0ubuntu2.1) 7.4-2012.04
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://bugs.launchpad.net/gdb-linaro/>.

chishanmingshen

没用这么调试的？

hmsghnh

.text_addr     这个可能是文件偏移之类的吧，
用file  objdump  nm readelf之类的命令看看你那个ko文件是不是真有符号在里面啊。

你这个是要干什么？

直接 gdb   *.ko 不就好了。

chishanmingshen

回复 5# hmsghnh


    要看动态的实时的啊。你那样只能看静态的。

humjb_1983

(gdb) add-symbol-file ./helloworld.ko -s .symtab 0xffffffffa0293000
USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*
(gdb) add-symbol-file ./helloworld.ko 0xffffffffa0290000
add symbol table from file "./helloworld.ko" at
        .text_addr = 0xffffffffa0290000
(y or n)

我的gdb是这样的，看似跟你的用法不一样，但我的环境看似正常的。