Obtaining frame pointer in C
- by assketchum
I'm trying to get the FP in my C program, I tried two different ways, but they both differ from what I get when I run GDB.
The first way I tried, I made a protocol function in C for the Assembly function:
int* getEbp();
and my code looks like this:
int* ebp = getEbp();
printf("ebp: %08x\n", ebp); // value i get here is 0xbfe2db58
while( esp <= ebp )
esp -= 4;
printf( "ebp: %08x, esp" ); //value i get here is 0xbfe2daec
My assembly code
getEbp:
movl %ebp, %eax
ret
I tried making the prototype function to just return an int, but that also doesn't match up with my GDB output. We are using x86 assembly.
EDIT: typos, and my getEsp function looks exactly like the other one:
getEsp:
movl %esp, %eax
ret
