Difference between revisions of "Auto Assembler:alloc"
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Note: Use [[Auto Assembler:dealloc|dealloc]] to free the memory when done. | Note: Use [[Auto Assembler:dealloc|dealloc]] to free the memory when done. | ||
| + | |||
| + | Note2: There are 2 other alloc variants. allocnx and allocxo. allocnx will allocate memory as non-executable. allocxo will allocate memory as execute only | ||
=== Command Parameters === | === Command Parameters === | ||
Revision as of 14:48, 25 June 2018
Auto Assembler alloc(SymbolName, Size, AllocateNearThisAddress OPTIONAL)
Allocates a certain amount of memory and defines the symbol name in the script. If 'AllocateNearThisAddress' is specified CE will try to allocate the memory near that address. This is useful for 64-bit targets where the jump distance could be bigger than 2GB otherwise.
Note: Use dealloc to free the memory when done.
Note2: There are 2 other alloc variants. allocnx and allocxo. allocnx will allocate memory as non-executable. allocxo will allocate memory as execute only
Command Parameters
| Parameter | Type | Description |
|---|---|---|
| SymbolName | string | The symbol name to use for allocated memory |
| Size | integer | The byte size of the block of memory to allocate |
| AllocateNearThisAddress | string | The address to allocate near if given |
Examples
alloc(SomeSymbol, 0x4)
alloc(SomeSymbol, 0x1000)
alloc(SomeSymbol, $1000)
alloc(SomeSymbol, 0x4, Tutorial-x86_64.exe+164C2)
- From the SunBeam: CE actually fetches the module and allocates close to the end of the module. Additionally specifying +164C2 does not add to it in any way :D Jus' sayin' Tutorial-x86_64.exe is enough.post
alloc(SomeSymbol, 0x4, SomeAOBSymbol)
alloc(SomeSymbol, 0x1000, Tutorial-x86_64.exe)
alloc(SomeSymbol, $1000, Tutorial-x86_64.exe)
alloc(memloc1,4) 00451029: jmp 00410000 nop nop nop 00410000: mov [alloc1],esi mov [esi+80],ebx xor eax,eax jmp 00451031
