question regarding link_elf.c

[PL]

Dnia 29-09-2010 o godz. 16:23 Andriy Gapon napisał(a):
> on 29/09/2010 17:13 PL said the following:
> > It seems like it is not a problem in my own code, since readelf -S on a
> > elf file
> > gives me the same results as my debug messages. I've created an empty
> > module, to
> > simplify debugging. Both my code, and readelf says, that '.text' section
> > address
> > is 0x3e0, and its size is 7 bytes. Adding 0x3e0 to lf->address points to
> > a valid location.
> > 
> > '.data' is supposed to be at 0x1424 (again, both my code and readelf
> > returns the same thing),
> > but the actual data starts at lf->address + 0x3e7. How do I know ? I've
> > added global
> > initialized string variable in empty test module, and Im looking at the
> > memory to determine
> > it's location. I'm not sure what is wrong then.
> 
> 
> Can you post a link to the compiled test module?
> 
> --
> Andriy Gapon

Well.. i don't have any public 'hosting', but I put it in here:

http://www.4shared.com/dir/LHn_I393/sharing.html

Also, the code is as simple as:

  1 #include <sys/param.h>
  2 #include <sys/kernel.h>
  3 #include <sys/module.h>
  4
  5
  6 char *str =   "THIS IS A STR MARKING DATA START";
  7
  8 static int kms_null_handler(module_t m, int op, void *data)
  9 {
 10         return (0);
 11 }
 12
 13 static moduledata_t kms_null_data = {
 14         "kms_null",
 15         kms_null_handler,
 16         NULL,
 17 };
 18
 19 DECLARE_MODULE(kms_null, kms_null_data, SI_SUB_EXEC, SI_ORDER_ANY);

It is being compiled on i386/GENERIC kernel.