a bug with macro

flat assembler
Message board for the users of flat assembler.

Index > Compiler Internals > a bug with macro

Author

Thread

litwr

Joined: 23 Aug 2005
Posts: 11
Location: Moscow, Russia

litwr 07 Nov 2014, 19:08

Code:

format ELF64 executable 3
macro instring s {
        mov     rdx,str#s#maxlen
}
        instring 1
string1 rb      256
string2 rb      128
str1maxlen equ string2-string1

This doesn't work (error: undefined symbol 'str1maxlen') Sad

but this

Code:

str1maxlen equ string2-string1
macro instring s {
        mov     rdx,str#s#maxlen
}
        instring 1
string1 rb      256
string2 rb      128

works... IMHO this maybe resolved by more passes.

07 Nov 2014, 19:08

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 19871
Location: In your JS exploiting you and your system

revolution 07 Nov 2014, 19:37

Use "str1maxlen = string2-string1" instead of equ. This way the you use the assembler to compute the value instead of the preprocessor to define a symbol.

07 Nov 2014, 19:37

litwr

Joined: 23 Aug 2005
Posts: 11
Location: Moscow, Russia

litwr 08 Nov 2014, 06:04

Thanks!

08 Nov 2014, 06:04

< Last Thread | Next Thread >

Forum Rules:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum