Midv-075 Repack Guide

return a / b; default: puts("invalid operator"); exit(1);

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Build & run:

Key functions (names are inferred by pattern matching, not present in the binary):

(written onto the stack as the second argument b ) MIDV-075

At present, there is limited publicly available information on MIDV-075. It's possible that this identifier pertains to a:

The ( 0x40073f ) is stored at [rbp+8] . Because print_result prints the 64‑bit result as a signed integer with printf("%ld\n", result) , we can force the function to return a value that is exactly the saved RIP . return a / b; default: puts("invalid operator"); exit(1);

The trick: supply values a and b such that a + b == saved_rip (mod 2^64). Since saved_rip is a (the address of print_result after the call), we can compute the required operands offline.