unicorn/tests/fuzz/fuzz_emu_mips_32le.c

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#include <unicorn/unicorn.h>
// memory address where emulation starts
#define ADDRESS 0x1000000
uc_engine *uc;
int initialized = 0;
FILE * outfile = NULL;
int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
uc_err err;
if (initialized == 0) {
if (outfile == NULL) {
// we compute the output
outfile = fopen("/dev/null", "w");
if (outfile == NULL) {
printf("failed opening /dev/null\n");
abort();
return 0;
}
}
initialized = 1;
}
// Not global as we must reset this structure
// Initialize emulator in supplied mode
err = uc_open(UC_ARCH_MIPS, UC_MODE_MIPS32 + UC_MODE_LITTLE_ENDIAN, &uc);
if (err != UC_ERR_OK) {
printf("Failed on uc_open() with error returned: %u\n", err);
abort();
}
// map 4MB memory for this emulation
uc_mem_map(uc, ADDRESS, 4 * 1024 * 1024, UC_PROT_ALL);
// write machine code to be emulated to memory
if (uc_mem_write(uc, ADDRESS, Data, Size)) {
printf("Failed to write emulation code to memory, quit!\n");
abort();
}
// emulate code in infinite time & 4096 instructions
// avoid timeouts with infinite loops
err=uc_emu_start(uc, ADDRESS, ADDRESS + Size, 0, 0x1000);
if (err) {
fprintf(outfile, "Failed on uc_emu_start() with error returned %u: %s\n", err, uc_strerror(err));
}
uc_close(uc);
return 0;
}