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/*
A tool for the young exploit coder, Copyright (c) acpizer, 2001.
*/
#include <stdio.h>
#include <stdlib.h>
#include <sys/utsname.h>
char small_global[] = "acpizer";
int uninitialized_global;
int endianess() {
union {
long l;
char c[sizeof (long)];
} u;
u.l = 1;
return (u.c[sizeof (long) - 1] == 1);
}
static int iterate = 10;
int stack_growsdown(int *x) {
auto int y;
y = (x > &y);
if (--iterate > 0)
y = stack_growsdown(&y);
if (y != (x > &y))
exit(1);
return y;
}
typedef struct {
char * sys_name;
char * sys_release;
char * sys_version;
char * sys_machine;
unsigned long int malloc_zero;
unsigned long int malloc_neg;
unsigned long int malloc_big;
unsigned long int malloc_small;
unsigned long int malloc_tiny;
unsigned long int bss;
unsigned long int data;
int sizeof_int;
int sizeof_voidptr;
unsigned long int env_start;
unsigned long int frame_addr;
int stack_down;
int endian_big;
} sys_def;
sys_def this;
int
main (int argc, char *argv[], char *env[])
{
struct utsname uts;
char localstack[5];
auto int x;
printf("splocoder, v1.0 by acpizer & sc -- team teso.\n\n");
uname (&uts);
this.sys_name = uts.sysname;
this.sys_release = uts.release;
this.sys_version = uts.version;
this.sys_machine = uts.machine;
#ifdef VERBOSE
printf("System: %s %s %s %s\n\n", uts.sysname, uts.release, uts.version,
uts.machine);
#endif
this.malloc_zero = (unsigned long int) malloc (0);
this.malloc_neg = (unsigned long int) malloc (-4);
this.malloc_big = (unsigned long int) malloc (1024 * 1024);
#ifdef VERBOSE
printf("malloc(0) returns: 0x%08lx\n", this.malloc_zero);
printf("malloc(-4) returns: 0x%08lx\n", this.malloc_neg);
printf("Big heap: 0x%08lx\n", this.malloc_big);
#endif
/* There might be a differece, depending on malloc implementation. */
this.malloc_small = (unsigned long int) malloc (100);
this.malloc_tiny = (unsigned long int) malloc (5);
#ifdef VERBOSE
printf("Small heap: 0x%08lx\n", this.malloc_small);
printf("Tiny heap: 0x%08lx\n\n", this.malloc_tiny);
#endif
this.bss = (unsigned long int) &uninitialized_global;
this.data = (unsigned long int) &small_global;
#ifdef VERBOSE
printf("bss is at: 0x%08lx\n", this.bss);
printf("Initialized global data is at: 0x%08lx\n\n", this.data);
#endif
this.sizeof_int = sizeof (int);
this.sizeof_voidptr = sizeof (void *);
#ifdef VERBOSE
printf("sizeof(int): %d\n", this.sizeof_int);
printf("sizeof(void *): %d\n\n", this.sizeof_voidptr);
#endif
this.env_start = (unsigned long int) &env[0];
#ifdef VERBOSE
printf("environ[0]: 0x%08lx\n\n", this.env_start);
#endif
this.frame_addr = (unsigned long int) &localstack;
#ifdef VERBOSE
printf("Local stack variable is at 0x%08lx\n", this.frame_addr);
#endif
this.stack_down = stack_growsdown (&x) ? 1 : 0;
#ifdef VERBOSE
printf("Stack growth direction: %s\n", this.stack_down ? "down" : "up");
#endif
this.endian_big = endianess () ? 1 : 0;
#ifdef VERBOSE
printf("Endianess: %s\n\n", this.endian_big ? "big" : "little");
#endif
{
char sys[30];
snprintf (sys, sizeof (sys), "%s-%s-%s", this.sys_name,
this.sys_release, this.sys_machine);
fprintf (stderr, "%-32s ", sys);
}
fprintf (stderr, "%s %-10s ", this.endian_big ? "be" : "le",
this.stack_down ? "stackdown" : "stackup");
fprintf (stderr, "%3d %3d\n",
this.sizeof_int, this.sizeof_voidptr);
fprintf (stderr, "%-33s%08lx %08lx %08lx %08lx",
" data bss stack env",
this.data, this.bss,
this.frame_addr, this.env_start);
fprintf (stderr, "\n");
fprintf (stderr, "%-33s%08lx %08lx %08lx %08lx %08lx ",
" M: zero neg big small tiny",
this.malloc_zero, this.malloc_neg, this.malloc_big,
this.malloc_small, this.malloc_tiny);
fprintf (stderr, "\n");
exit (EXIT_SUCCESS);
}
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