Problem with Listing

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booter

Joined: 08 Dec 2006
Posts: 67

booter 17 May 2009, 07:07

As I understand, program listing is needed when you want to know what exactly was generated by FASM from your source file.
That includes not just hex code, but also what was generated by macros. What we currently have is just the text of the macro call on the right and some "magic" hex data on the left.
I don't really want to digg into how the macro was processed, but I want to see (in human readable form) what exactly was generated.
Particularly to deal with problems like that:

Code:

; That's OK
push ecx
push edx
invoke someW32,a,b,c,d
pop  edx
pop  ecx
; That's not OK (somehow different)
macro callW32 prc,[arg]
{
  push ecx
  push edx
  invoke prc,arg
  pop  edx
  pop  ecx
}
callW32 someW32,a,b,c,d

Also, unused procedures are present in the listing for no apparent reason. No code is generated for them. Same with constants and macro definitions. Why copy them from program source? Macro calls and source comments are useful to match the listing and source, but why would we need the rest?

Also, in the listing I see all kernel32 entries (import kernel32,\...), but they are not in the executable. So where hex data on the left have come from?

17 May 2009, 07:07

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20759
Location: In your JS exploiting you and your system

revolution 17 May 2009, 07:31

http://board.flatassembler.net/topic.php?t=4490

17 May 2009, 07:31

booter

Joined: 08 Dec 2006
Posts: 67

booter 17 May 2009, 10:09

Quote:

http://board.flatassembler.net/topic.php?t=4490

1. Even "short" FasmPre by decard produces way too much information unrelated to the compiler results, for example

Code:

if used GetCurrentProcessId&'GetCurrentProcessId' eqtype ''
_label?00006A0 dw 0
db 'GetCurrentProcessId',0
rb RVA $ and 1
end if

2. I was writing about the listing, not results of preprocessor.

17 May 2009, 10:09

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20759
Location: In your JS exploiting you and your system

revolution 17 May 2009, 11:00

You can combine the two. You need the preprocessor output code to see the macro expansion and you need the listing output code to see the byte codes generated.

17 May 2009, 11:00

Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 8466
Location: Kraków, Poland

Tomasz Grysztar 17 May 2009, 16:17

revolution: there already is a prepsrc tool in the official fas-processing tools pack, no need to hack the fasm source anymore (well, unless you need to get preprocessed source in case when assembly failed, but that's a different story).

17 May 2009, 16:17

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20759
Location: In your JS exploiting you and your system

revolution 18 May 2009, 06:50

Please help me to find the "official fas-processing tools pack" Question

18 May 2009, 06:50

Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 8466
Location: Kraków, Poland

Tomasz Grysztar 18 May 2009, 07:04

1) Get any of the fasm packages and unpack it.
2) Go to the TOOLS directory.
[OPTIONAL] 3) Read this thread, too: http://board.flatassembler.net/topic.php?t=9792

18 May 2009, 07:04

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20759
Location: In your JS exploiting you and your system

revolution 18 May 2009, 07:07

Tomasz Grysztar wrote:

2) Go to the TOOLS directory.

Thanks, I hadn't seen that folder before!

18 May 2009, 07:07

Madis731

Joined: 25 Sep 2003
Posts: 2138
Location: Estonia

Madis731 18 May 2009, 12:04

Yeah, I also found it by accident. It was a nice surprise. Sorry that I didn't let the other board members know, but at that time I thought everybody else knew Smile

18 May 2009, 12:04

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