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Présentation : When working outside the walled garden of byte code VMs and interpreted languages there is always the chance you might shoot yourself in the foot. This usually results in a segfault. As a courtesy, f0 can recover from segfaults. . f0 f0 1 2 3 4 We push some stuff on the stack and there it is. f0 0 0x4 4 1 0x3 3 2 0x2 2 We invoke dict_get with ' '. It expects a pointer to a string the key to find but there are only a bunch of numbers on the stack. f0 Segorimus Faultimium and subsequent recovery. wh000ps we've triggered SIGSEGV. let's try and recover. hold on tight ... stack dump b78e0a1c 7b 00 00 00 7b 00 00 00 00 00 00 00 00 00 00 00 b78e0a2c 90 0f 8e b7 60 0f 8e b7 f4 5f 26 00 aa 02 00 00 b78e0a3c 04 00 00 00 04 00 00 00 0e 00 00 00 04 00 00 00 b78e0a4c 85 37 18 00 73 00 00 00 46 02 21 00 60 0f 8e b7 b78e0a5c 7b 00 00 00 f0 0c 8e b7 00 00 00 00 00 00 00 00 b78e0a6c 00 00 00 00 20 00 00 00 00 00 00 00 00 00 00 00 b78e0a7c 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 b78e0a8c 00 00 00 00 d0 0e 8e b7 00 00 00 00 76 fb ff ff b78e0a9c 00 00 00 00 0a 00 00 00 cf 0e 8e b7 cf 0e 8e b7 b78e0aac 01 00 00 00 00 00 00 00 02 00 00 00 82 ef 14 00 b78e0abc 00 00 00 00 9b 98 04 08 e0 59 26 00 9c 98 04 08 b78e0acc 74 65 26 00 00 00 00 00 90 98 04 08 00 00 00 00 b78e0adc b8 0f 8e b7 90 98 04 08 09 00 00 00 00 00 00 00 b78e0aec 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 b78e0afc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 b78e0b0c 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 eip 183785 esp b78e0f60 ebp b78e0f60 searching stack for recovery point 80492d3, 80493eb found it b78e0ff4 804936b restoring eip to 0x804936b Almost like we never left the resort. f0 0 0x8048a70 134515312 1 0x3 3 2 0x2 2 f0
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