mirror of
https://github.com/yuzu-emu/unicorn.git
synced 2024-12-23 20:05:30 +00:00
117 lines
2.7 KiB
C
117 lines
2.7 KiB
C
#define __STDC_FORMAT_MACROS
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#include <string.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unicorn/unicorn.h>
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uint64_t baseranges[] = {0,0,0,0};
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int step =0;
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uint64_t urnd(){
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uint64_t rnd = rand();
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rnd = rnd << 32;
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rnd += rand();
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return rnd;
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}
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uint64_t get_addr(){
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uint64_t base = ((uint64_t)urnd())%4;
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uint64_t addr= baseranges[base] + urnd()%(4096*10);
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return addr;
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}
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uint64_t get_aligned_addr(){
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uint64_t addr = get_addr();
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return addr - (addr % 4096);
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}
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uint64_t get_len(){
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uint64_t len = (urnd() % (4096*5))+1;
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return len;
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}
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uint64_t get_aligned_len(){
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uint64_t len = get_len();
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len = len - (len %4096);
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len = ((len == 0) ? 4096 : len);
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return len;
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}
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void perform_map_step(uc_engine *uc){
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uint64_t addr = get_aligned_addr();
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uint64_t len = get_aligned_len();
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printf("map(uc,0x%"PRIx64",0x%"PRIx64"); //%d\n", addr, len, step);
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uc_mem_map(uc, addr, len, UC_PROT_READ | UC_PROT_WRITE);
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}
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void perform_unmap_step(uc_engine *uc){
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uint64_t addr = get_aligned_addr();
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uint64_t len = get_aligned_len();
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printf("unmap(uc,0x%"PRIx64",0x%"PRIx64"); //%d\n", addr, len, step);
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uc_mem_unmap(uc, addr, len);
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}
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void perform_write_step(uc_engine *uc){
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char buff[4096*4];
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memset((void *)buff, 0, 4096*4);
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uint64_t addr = get_addr();
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uint64_t len = get_len()%(4096*3);
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printf("write(uc,0x%"PRIx64",0x%"PRIx64"); //%d\n", addr, len, step);
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uc_mem_write(uc, addr, buff, len);
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}
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void perform_read_step(uc_engine *uc){
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char buff[4096*4];
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uint64_t addr = get_addr();
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uint64_t len = get_len()%(4096*4);
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printf("read(uc,0x%"PRIx64",0x%"PRIx64"); //%d\n", addr, len, step);
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uc_mem_read(uc, addr, buff, len);
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}
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void perform_fuzz_step(uc_engine *uc){
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switch( ((uint32_t)rand())%4 ){
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case 0: perform_map_step(uc); break;
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case 1: perform_unmap_step(uc); break;
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case 2: perform_read_step(uc); break;
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case 3: perform_write_step(uc); break;
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}
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}
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int main(int argc, char **argv, char **envp)
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{
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uc_engine *uc;
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uc_err err;
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if(argc<2){
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printf("usage: mem_fuzz $seed\n");
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return 1;
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}
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int seed = atoi(argv[1]);
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int i = 0;
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//don't really care about quality of randomness
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srand(seed);
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printf("running with seed %d\n",seed);
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// Initialize emulator in X86-32bit mode
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err = uc_open(UC_ARCH_X86, UC_MODE_64, &uc);
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if (err) {
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printf("Failed on uc_open() with error returned: %u\n", err);
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return 1;
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}
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for(i = 0; i < 2048; i++){
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step++;
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perform_fuzz_step(uc);
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}
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// fill in sections that shouldn't get touched
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if (uc_close(uc) != UC_ERR_OK) {
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printf("Failed on uc_close\n");
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return 1;
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}
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return 0;
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}
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