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

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Devel99

Joined: 26 Oct 2015
Posts: 30

Devel99 12 Nov 2015, 00:42

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

12 Nov 2015, 00:42

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20337
Location: In your JS exploiting you and your system

revolution 12 Nov 2015, 00:58

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>>>

12 Nov 2015, 00:58

Devel99

Joined: 26 Oct 2015
Posts: 30

Devel99 12 Nov 2015, 02:17

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

yay thanks a lot, you rock! Wink

12 Nov 2015, 02:17

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20337
Location: In your JS exploiting you and your system

revolution 12 Nov 2015, 02:28

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>>>>>

12 Nov 2015, 02:28

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20337
Location: In your JS exploiting you and your system

revolution 12 Nov 2015, 02:35

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'.

12 Nov 2015, 02:35

Devel99

Joined: 26 Oct 2015
Posts: 30

Devel99 12 Nov 2015, 03:14

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

12 Nov 2015, 03:14

l4m2

Joined: 15 Jan 2015
Posts: 674

l4m2 09 Dec 2015, 01:48

Code:

rept 1 {mov ax, 3 } mov bx, 2

09 Dec 2015, 01:48

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