119 lines
2.7 KiB
C
119 lines
2.7 KiB
C
#define __STDC_FORMAT_MACROS
|
|
#include "unicorn/platform.h"
|
|
#include <string.h>
|
|
#include "unicorn/platform.h"
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <time.h>
|
|
|
|
#include <unicorn/unicorn.h>
|
|
|
|
|
|
uint64_t baseranges[] = {0,0,0,0};
|
|
int step =0;
|
|
|
|
uint64_t urnd(){
|
|
uint64_t rnd = rand();
|
|
rnd = rnd << 32;
|
|
rnd += rand();
|
|
return rnd;
|
|
}
|
|
uint64_t get_addr(){
|
|
uint64_t base = ((uint64_t)urnd())%4;
|
|
uint64_t addr= baseranges[base] + urnd()%(4096*10);
|
|
return addr;
|
|
}
|
|
|
|
uint64_t get_aligned_addr(){
|
|
uint64_t addr = get_addr();
|
|
return addr - (addr % 4096);
|
|
}
|
|
|
|
uint64_t get_len(){
|
|
uint64_t len = (urnd() % (4096*5))+1;
|
|
return len;
|
|
}
|
|
|
|
uint64_t get_aligned_len(){
|
|
uint64_t len = get_len();
|
|
len = len - (len %4096);
|
|
len = ((len == 0) ? 4096 : len);
|
|
return len;
|
|
}
|
|
|
|
void perform_map_step(uc_engine *uc){
|
|
uint64_t addr = get_aligned_addr();
|
|
uint64_t len = get_aligned_len();
|
|
printf("map(uc,0x%"PRIx64",0x%"PRIx64"); //%d\n", addr, len, step);
|
|
uc_mem_map(uc, addr, len, UC_PROT_READ | UC_PROT_WRITE);
|
|
}
|
|
|
|
void perform_unmap_step(uc_engine *uc){
|
|
uint64_t addr = get_aligned_addr();
|
|
uint64_t len = get_aligned_len();
|
|
printf("unmap(uc,0x%"PRIx64",0x%"PRIx64"); //%d\n", addr, len, step);
|
|
uc_mem_unmap(uc, addr, len);
|
|
}
|
|
|
|
void perform_write_step(uc_engine *uc){
|
|
char* buff[4096*4];
|
|
memset(buff, 0, 4096*4);
|
|
uint64_t addr = get_addr();
|
|
uint64_t len = get_len()%(4096*3);
|
|
printf("write(uc,0x%"PRIx64",0x%"PRIx64"); //%d\n", addr, len, step);
|
|
uc_mem_write(uc, addr, buff, len);
|
|
}
|
|
|
|
void perform_read_step(uc_engine *uc){
|
|
char* buff[4096*4];
|
|
uint64_t addr = get_addr();
|
|
uint64_t len = get_len()%(4096*3);
|
|
printf("read(uc,0x%"PRIx64",0x%"PRIx64"); //%d\n", addr, len, step);
|
|
uc_mem_read(uc, addr, buff, len);
|
|
}
|
|
|
|
void perform_fuzz_step(uc_engine *uc){
|
|
switch( ((uint32_t)rand())%4 ){
|
|
case 0: perform_map_step(uc); break;
|
|
case 1: perform_unmap_step(uc); break;
|
|
case 2: perform_read_step(uc); break;
|
|
case 3: perform_write_step(uc); break;
|
|
}
|
|
}
|
|
|
|
int main(int argc, char **argv, char **envp)
|
|
{
|
|
uc_engine *uc;
|
|
uc_err err;
|
|
if(argc<2){
|
|
printf("usage: mem_fuzz $seed\n");
|
|
return 1;
|
|
}
|
|
int seed = atoi(argv[1]);
|
|
int i = 0;
|
|
|
|
//don't really care about quality of randomness
|
|
srand(seed);
|
|
printf("running with seed %d\n",seed);
|
|
|
|
// Initialize emulator in X86-32bit mode
|
|
err = uc_open(UC_ARCH_X86, UC_MODE_64, &uc);
|
|
if (err) {
|
|
printf("Failed on uc_open() with error returned: %u\n", err);
|
|
return 1;
|
|
}
|
|
|
|
for(i = 0; i < 2048; i++){
|
|
step++;
|
|
perform_fuzz_step(uc);
|
|
}
|
|
// fill in sections that shouldn't get touched
|
|
|
|
if (uc_close(uc) != UC_ERR_OK) {
|
|
printf("Failed on uc_close\n");
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|