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Posted: **Tue May 03, 2005 11:55 am**

The module support for my kernel is nearly finished

. I only can't figure out when the ELF-file tells me that the call is relative, how I can link that address to a function in my kernel. When I use an absolute address in my module (by using a function pointer), it works all fine - except printing strings. Direct values (using putchar) works fine - a whole string with puts prints a whole bunch of weird characters on the screen.

Anyone?

Thanks

.

Posted: **Wed May 04, 2005 3:26 pm**

i have figured out this code to link external relatives (and it works

):

Code: Select all

*((uint*)(section.bits + rel.r_offset)) = 0xfffffffc - ((target - exports[i].addr) + rel.r_offset + section.base);

/* section.bits = programbits
 * 0xfffffffc = start at 0 at function (not sure about this, but it works)
 * target = where the program is in the memory
 * exports[i].addr = the address of the function in the kernel
 * rel.r_offset = where in the kernel the function is called
*/

so this code works... but i'm not sure this'll work in all cases?

thanks

btw, strings do work now as well

:D

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