我尝试使用gdb来反汇编内核,并尝试运行:
root@debian:/home/jestinjoy# gdb /usr/src/linux-2.6.38.8/vmlinux
GNU gdb (GDB) 7.0.1-debian
Copyright (C) 2009 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 "i486-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/src/linux-2.6.38.8/vmlinux...done.
(gdb) disass sys_read
Dump of assembler code for function sys_read:
0xc10cacb9 <sys_read+0>: push %ebp
0xc10cacba <sys_read+1>: mov %esp,%ebp
0xc10cacbc <sys_read+3>: push %esi
0xc10cacbd <sys_read+4>: mov $0xfffffff7,%esi
0xc10cacc2 <sys_read+9>: push %ebx
0xc10cacc3 <sys_read+10>: sub $0xc,%esp
0xc10cacc6 <sys_read+13>: mov 0x8(%ebp),%eax
0xc10cacc9 <sys_read+16>: lea -0xc(%ebp),%edx
0xc10caccc <sys_read+19>: call 0xc10cb346 <fget_light>
0xc10cacd1 <sys_read+24>: test %eax,%eax
0xc10cacd3 <sys_read+26>: mov %eax,%ebx
0xc10cacd5 <sys_read+28>: je 0xc10cad10 <sys_read+87>
0xc10cacd7 <sys_read+30>: mov 0x2c(%ebx),%edx
0xc10cacda <sys_read+33>: mov 0x28(%eax),%eax
0xc10cacdd <sys_read+36>: mov 0x10(%ebp),%ecx
0xc10cace0 <sys_read+39>: mov %edx,-0x10(%ebp)
0xc10cace3 <sys_read+42>: mov 0xc(%ebp),%edx
0xc10cace6 <sys_read+45>: mov %eax,-0x14(%ebp)
0xc10cace9 <sys_read+48>: lea -0x14(%ebp),%eax
0xc10cacec <sys_read+51>: push %eax
0xc10caced <sys_read+52>: mov %ebx,%eax
0xc10cacef <sys_read+54>: call 0xc10cab82 <vfs_read>
0xc10cacf4 <sys_read+59>: mov -0x10(%ebp),%edx
0xc10cacf7 <sys_read+62>: mov %eax,%esi
它运行得很好。但是当我尝试运行时
root@debian:/home/jestinjoy# gdb /usr/src/linux-2.6.38.8/vmlinux /proc/kcore
GNU gdb (GDB) 7.0.1-debian
Copyright (C) 2009 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 "i486-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/src/linux-2.6.38.8/vmlinux...done.
Core was generated by `BOOT_IMAGE=/boot/vmlinuz-2.6.38.8 root=UUID=b61e8ee2-949a-4810-ac56-42564ee005d7'.
#0 0x00000000 in ?? ()
(gdb) disass sys_read
Dump of assembler code for function sys_read:
0xc10cacb9 <sys_read+0>: add %al,(%eax)
0xc10cacbb <sys_read+2>: add %al,(%eax)
0xc10cacbd <sys_read+4>: add %al,(%eax)
0xc10cacbf <sys_read+6>: add %al,(%eax)
0xc10cacc1 <sys_read+8>: add %al,(%eax)
0xc10cacc3 <sys_read+10>: add %al,(%eax)
0xc10cacc5 <sys_read+12>: add %al,(%eax)
0xc10cacc7 <sys_read+14>: add %al,(%eax)
0xc10cacc9 <sys_read+16>: add %al,(%eax)
0xc10caccb <sys_read+18>: add %al,(%eax)
0xc10caccd <sys_read+20>: add %al,(%eax)
0xc10caccf <sys_read+22>: add %al,(%eax)
0xc10cacd1 <sys_read+24>: add %al,(%eax)
0xc10cacd3 <sys_read+26>: add %al,(%eax)
0xc10cacd5 <sys_read+28>: add %al,(%eax)
0xc10cacd7 <sys_read+30>: add %al,(%eax)
它给出了奇怪的结果。我正在运行
CONFIG_DEBUG_INFO=y
和内核版本为2.6.38。
config
可以在 http://pastebin.com/BiNpDmvY 找到。我是否错过了一些配置? - user567879