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