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Index > Macroinstructions > Nested macro problem: T nop, <T cli, sti>

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Devel99



Joined: 26 Oct 2015
Posts: 30
Devel99
does anyone know how make that compilable?

I have T macto with two arguments. Both args are asm commands:

Code:
macro T op1, op2
{
  op1
  op2
}

T clc, cld
T nop, <T cli, sti>
    


the first macro compiled correctly but the last one fails with "Illegal instruction: T cli,sti"

if I add T2 clone macro all is ok. What do you think is the problem with nested macro?

Code:
macro T op1, op2
{
  op1
  op2
}
macro T2 op1, op2
{
  op1
  op2
}
T clc, cld
T nop, <T2 cli, sti>
    


thanks in advance
Post 12 Nov 2015, 00:42
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17720
Location: In your JS exploiting you and your system
revolution
You can't have a macro call itself. But you can make another macro of the same name and call that:
Code:
macro T op1, op2
{
  op1
  op2
}

macro T op1, op2
{
  op1
  op2
}

T clc, cld
T nop, <T cli, sti>    
And there is another way also. You can make a new macro inside the macro which allows for infinite nesting:
Code:
macro make_T {
        macro T op1, op2 \{
                make_T
                op1
                op2
                purge T
        \}
}make_T

T clc, cld
T nop, <T cli, <T int3, <mov eax,ebx>>>    
Post 12 Nov 2015, 00:58
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Devel99



Joined: 26 Oct 2015
Posts: 30
Devel99
revolution damn that's awesome! you're the best macro engineer ever

T <T <T iret, db 0xCC>, cld>, <T cli, <T int3, <mov eax,ebx>>> Very Happy Very Happy

yay thanks a lot, you rock! Wink
Post 12 Nov 2015, 02:17
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17720
Location: In your JS exploiting you and your system
revolution
You don't need to limit yourself to two opcodes.
Code:
macro make_T {
        macro T [ops] \{
            \common
                make_T
            \forward
                ops
            \common
                purge T
        \}
}make_T

T clc
T iret, cld, int3, inc eax, stosb, jmp $
T nop, <T cli, <T int3, <mov eax,ebx>, <T cmpsb, <T retn, <aam>,<T db 1, db 2>>>>>    
Post 12 Nov 2015, 02:28
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17720
Location: In your JS exploiting you and your system
revolution
Devel99 wrote:
revolution damn that's awesome! you're the best macro engineer ever
No, this idea comes from the win32ax.inc include that Tomasz made. See the macro 'allow_nesting'.
Post 12 Nov 2015, 02:35
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Devel99



Joined: 26 Oct 2015
Posts: 30
Devel99
yeah, but my program's logic implicates using only two macro parameters where each one is an argument in two-operand instruction like add x1, x2 )) Cool
Post 12 Nov 2015, 03:14
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l4m2



Joined: 15 Jan 2015
Posts: 657
l4m2
Code:
rept 1 {mov ax, 3 } mov bx, 2       
Post 09 Dec 2015, 01:48
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