Created
September 24, 2018 16:29
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[Patch all XREFs] #r2pipe #radare2 #r2 #patch
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| # WARNING: This is probably bad in most cases, you should first analyze your binary and figure out if you really want to nop out all xrefs... | |
| import r2pipe | |
| import sys | |
| NOP = '90' | |
| def main(binary, location): | |
| r2 = r2pipe.open(binary, ['-w']) | |
| print '[-] Analyzing binary...' | |
| r2.cmd('aaa') | |
| print '[+] Finished running aaa!' | |
| xrefs = r2.cmdj('axtj @ {}'.format(location)) | |
| print '[+] Found {} XREFS to address {}'.format(len(xrefs), location) | |
| xrefs_locations = [i['from'] for i in xrefs] | |
| xref_instructions = [r2.cmdj('pdj 1 @ {}'.format(i))[0] for i in xrefs_locations] | |
| for ins in xref_instructions: | |
| patch = (len(ins['bytes']) / 2) * NOP | |
| loc = ins['offset'] | |
| print '[!] Writing {} over {} ({}) in address {}'.format(patch, ins['bytes'], ins['disasm'], hex(loc)) | |
| r2.cmd('wx {} @ {}'.format(patch, loc)) | |
| print '[+] Finished patching!' | |
| if __name__ == '__main__': | |
| if len(sys.argv) != 3: | |
| print 'Usage: xref_patch.py <binary> <location>' | |
| sys.exit(1) | |
| print 'WARNING: No backup file is made' | |
| main(sys.argv[1], sys.argv[2]) |
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