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Index > Macroinstructions > Access keytable

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kingjojo



Joined: 01 Nov 2013
Posts: 2
kingjojo
Code:
format PE GUI 4.0
entry start

macro testMacro arg1, keyTable
{
        count = (keyTable#.end - keyTable#.begin)
        repeat count
                load key byte from keyTable#.begin+%-1
        end repeat
}

section '.data' data readable writeable
        keyTableTest.begin:
                db 0x12, 0x13, 0x14, 0x15, 0x16, 0x17
        keyTableTest.end:

        
section '.code' code readable executable
        start:
        push ebp
        mov ebp, esp
        
        xor eax, eax
        mov esp, ebp
        pop ebp
        ret
        
        testMacro testArg, keyTableTest
    


I always get the error and I have no clue what im doing wrong. I would really appreciate it if somebody could help me with that.
Quote:

load key byte from keyTable#.begin+%-1
error: value out of range.
Post 02 Nov 2013, 00:28
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17669
Location: In your JS exploiting you and your system
revolution
Because the data being loaded is in a different section you need to define an addressing space label with the double colon (::)
Code:
format PE GUI 4.0
entry start

macro testMacro arg1, keyTable
{
        count = (keyTable#.end - keyTable#.begin)
        repeat count
                load key byte from keyTable:keyTable#.begin+%-1
        end repeat
}

section '.data' data readable writeable
        keyTableTest::
        keyTableTest.begin:
                db 0x12, 0x13, 0x14, 0x15, 0x16, 0x17
        keyTableTest.end:


section '.code' code readable executable
        start:
        testMacro testArg, keyTableTest    
Post 02 Nov 2013, 02:06
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kingjojo



Joined: 01 Nov 2013
Posts: 2
kingjojo
Thank you very much, it works!
Post 02 Nov 2013, 15:45
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