Re: ELF file and GOT entries

["Sandeep K Sinha" <sandeepksinha@xxxxxxxxx>]

Hi,

Send it to the binutils mailing list, they work on objdump and dis-assemblers.
You will more specific and too the point answers.


On Tue, May 20, 2008 at 6:06 PM, Mulyadi Santosa
<mulyadi.santosa@xxxxxxxxx> wrote:
> Hi...
>
> On Tue, May 20, 2008 at 4:11 PM, Shyamal Shukla <shyamalshukla@xxxxxxxxx> wrote:
>> The program is an extremely simple one, to get an idea as to where the stack
>> and heap lie, by making calls to malloc, printf and sleep.
>>
>> #include <stdio.h>
>>
>> void some_func()
>> {
>>   printf("\n I am here\n");
>> }
>>
>> int main(void)
>> {
>>   int var = 5;
>>   int * iptr = malloc(sizeof(int));
>>
>>   printf("\n Addr of var = %p, Dynamically allocated memory at
>> %p\n",&var,iptr);
>>
>>   sleep(500);
>>
>>   return 0;
>> }
>>
>> Sleep(500) has been provided so that i can cat /proc/pid/maps
>>
>> Compiled simply using gcc prog_name.c
>>
>> I don't have LD_BIND_NOW defined on my system.
>
> I don't have access to any Linux boxes, so I can't check your code
> directly. From what I see, PLT section in your ELF should at least
> contains entries for malloc(), printf, sleep.
>
> Try my idea....use gdb to inspect your code.....make a breakpoint at
> malloc() and printf(). SInce you say you don't use LD_BIND_NOW, once
> you do the tracing via "step" (any gdb command that delve into the
> code path), you can see by yourself which entry on GOT/PLT that it
> takes.
>
> regards,
>
> Mulyadi.
>
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>

-- 
Regards,
Sandeep.






"To learn is to change. Education is a process that changes the learner."

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