Re: undefined references

[John Richard Moser <nigelenki@comcast.net>]

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Valdis.Kletnieks@vt.edu wrote:
> On Mon, 24 Jan 2005 19:04:53 EST, John Richard Moser said:
> 
> 
>>fs/built-in.o(.text+0xe413): In function `link_path_walk':
>>: undefined reference to `gr_inode_follow_link'
>>fs/built-in.o(.text+0xe933): In function `link_path_walk':
>>: undefined reference to `gr_inode_follow_link'
>>fs/built-in.o(.text+0x10c28): In function `sys_link':
>>: undefined reference to `gr_inode_hardlink'
>>fs/built-in.o(.text+0x10c52): In function `sys_link':
>>: undefined reference to `gr_inode_handle_create'
>>make: *** [.tmp_vmlinux1] Error 1
>>
>>What would cause this kind of error?
> 
> 
> link_path_walk() still has a reference to gr_inode_follow_link (the code
> you probably want to move to an LSM exit), and sys_ling() still calls
> gr_inode_hardlink() and gr_inode_handle_create() - but the actual functions
> you're calling either don't exist anymore, or they didn't get compiled and linked
> in.  If those functions are supposed to exist, you need to get them into a .o.
> If those are (as I suspect) becoming LSM exit hooks, then you need to clean up
> the direct calls in link_path_walk() and sys_link().

I figured it out.

I had in the makefile

subdir-$(CONFIG_GRSECURITY) += grsecurity/

I had to use obj- instead.


This is just an academic thing-- I'm rewriting GrSecurity's invasive
code as a bunch of hooks, collapsing what I can down, and making a
stackable (easy) security framework from scratch (what the hell am I
doing?).  I'm not modifying LSM, though I did rip off the
security_initcall things (did I just create a new .text section in
vmlinuz?  o.o).

Thanks for your comments though.  I'll look to them if I have trouble in
the future.
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