| Racho |
12-09-2022 09:31 AM |
How can i get the .data, .text and .bss segment addresses in C?
Hi there!
I've made this program to show the memory map of a program in linux:
Code:
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
int una_funcion()
{
return 0;
}
int global_uninitialized;
int global_initialized=1;
int main()
{
char *mem;
register void *stack1 asm("ebp");
int i=100;
int j;
static int static_var=10;
static int static_var2;
mem = malloc(100);
if (mem == NULL)
return -1;
printf("64 bit memory addresses are:\n");
printf(" +-----------------------------------------------+ 0xffff ffff ffff ffff\n");
printf(" | |\n");
printf(" | kernel segment | kernel space\n");
printf(" | |\n");
printf(" +-----------------------------------------------+ 0xffff 8000 0000 0000\n");
printf(" | |\n");
printf(" | Non-canonical space | unused\n");
printf(" | |\n");
printf(" +-------------------+--+-------------------+----+ 0x0000 7fff ffff ffff\n");
printf(" | stack 1 | | stack 2 | ....\n");
printf(" | ... | | ... |\n");
printf(" | library mapping1 | | library mapping2 |\n");
printf(" | ... | | ... |\n");
printf(" | Heap1 | | Heap2 | User space\n");
printf(" | bss segment1 | | bss segment2 |\n");
printf(" | data segment1 | | data segment2 |\n");
printf(" | text1 | | text2 |\n");
printf(" +-------------------+ +-------------------+ 0x0000 0000 0000 0000\n");
printf("\n");
printf("Stack begins at: ebp:\t\t\t%p\n", stack1);
printf("In the stack, local variable:\t\t%p\n", &j);
printf("In the stack, local variable:\t\t%p\n", &i);
printf("In library mappings: printf:\t\t%p\n", printf);
printf("In library mappings: fork:\t\t%p\n", fork);
printf("In heap segment: reserva con malloc:\t%p\n", mem);
printf("In .bss uninitialized global var:\t%p\n", &global_uninitialized);
printf("In .data initialized gloval var:\t%p\n", &global_initialized);
printf("In .data local static inizialized:\t%p\n", &static_var);
printf("In .data local static uninizialized:\t%p\n", &static_var2);
printf("In .text segment: main():\t\t%p\n", main);
printf("In .text segment: funcion:\t\t%p\n", una_funcion);
free(mem);
return 0;
}
I would like to add the start address of .text, .data and .bss segments. And it would be great to add the ending addresses too!
Can anyone help me? |
