![]() This allows us to go beyond 0x80/4 = 32 parameters and 0圆0 payload bytes. Firefox 7 was released on September 27, 2011, and uses as much as 50 less RAM than Firefox 4 as a result of the MemShrink project to reduce Firefox memory. Two other bytes as a relative short jump (ebXX) to the next two payload bytes. Nevertheless, we can use two bytes of an ASM.JS constant as payload bytes and the ![]() Hence, we can use the above trick to only hide 0x80/4 x 3 = 0圆0 payload bytes. If the stack offset is higher, another opcode is used with four-bytes offsets instead of one-byte offsets:īecomes c78424 80000000 909090a9 in order to keep the correct signedness. Without resynchronizing the original instruction stream during runtime. This way, we can hide again three-byte long instructions within ASM.JS constants
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