Error write failed fasm

The website has been updated with the small layout changes and the new
releases of flat assembler - final console version 1.41 and also a
pre-release of version for the Win32 GUI. Please test it.

-- 
Tomasz

Hello, there is pair of questions:
1)	How to connect in fASM resource RCDATA ?
     is not present in macros ?
2)      And if it is possible to receive more any
     _fASM_ source codes or where they can be 
downloaded?

Thanks.
All boons to you %-)
november 6rd 2002 / 17:32 / doz.me
do...@ho...

> How to define local variables in subroutines in FASM?
> in MASM it's done like following:
 
> test proc ArgNum:DWORD, test:DWORD
 
>     LOCAL testlocal1      :DWORD
 
>     push esi
>     push edi
> ...
 
>     pop edi
>     pop esi
 
>     ret
 
> I'd like to know how this will be in FASM

proc test ArgNum,test
  testlocal1 dd ?
      enter
      push esi
      push edi
      ;...
      pop edi
      pop edi
      return

-- 
Tomasz

hi, fasm-help.

How to define local variables in subroutines in FASM?
in MASM it's done like following:
 
test proc ArgNum:DWORD, test:DWORD 
 
    LOCAL testlocal1      :DWORD 
 
    push esi 
    push edi 
... 
 
    pop edi 
    pop esi 
 
    ret 
 
I'd like to know how this will be in FASM

Thanks a lot!

--- 
Origin: music
Andrey  mailto:so...@ma...
Sources pascal http://pascal.vov.ru/

Здравствуйте, Степанов.

Вы писали 11 октября 2002 г., 13:18:16:

СБА> HELP

Ты чего?
Тут же только на англицком...

-+- CUL Степанов -+- 
С уважением,
 Vitalij@Work                          mailto:dream...@la...
                                       2:5030/1416.222

> Maybe your text editor put only a Lf at the end of line, instead of CrLf.
That would not be a problem for fasm.
Maybe that vmware doesn't emulate frm correctly?

-- 
Tomasz

Maybe your text editor put only a Lf at the end of line, instead of CrLf.


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Hi, I'm trying to compile the following program inside a win98 vmware
virtual machine:

org 100h
use16

mov ah,02
mov dl,'A'
int 21h
int 20h

but I got this error:

flar assembler version 1.40
test.asm [1]:
org 100h
error: name too long.

----

what's wrong?

Thanks

JC



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Hi, I'm trying to compile the following program inside a win98 vmware
virtual machine:

org 100h
use16

mov ah,02
mov dl,'A'
int 21h
int 20h

but I got this error:

flar assembler version 1.40
test.asm [1]:
org 100h
error: name too long.

----

what's wrong?

Thanks

JC

1) There was a bug with invoke macro that caused local labels to not
work. Make sure you have the latest version this thread (look in
replies):
http://board.win32asmcommunity.net/showthread.php?s=&threadid=7468

2) There's a big difference between local variables for procedure
(which are defined by macros) and the local labels. You can use both
these features, or only one of them. Look in the docs - there's
explained how the local labels (with dot at the beginning) work. You
can name the local variable with local label, so it won't be assesible
after first non-local label in your proc, but it's a good solution if
you use only local labels inside the proc. You can also name local
variable with global label (without a dot at the beginning), but you
won't be able to define it twice in two different procedures. You can
even define local variables with both those names (as it's in your
example), but it can lead to mistakes, look at the example:

proc ShowMessageOne, ptrMsg
     .dummy dd ?      ; defines ShowMessageOn.dummy variable
     dummy dd ?       ; defines global dummy variable, new prefix for
                      ;   local labels is used
enter
     mov eax,[.dummy] ; now it tries to read from [dummy.dummy],
                      ;   causes an error
return
                      
-- 
Tomasz

hi, please have a look at the modified example.asm:


include '%include%/win32a.inc'

.data

  caption db "Win32 Assembly",0
  message db "Hi! I'm the example program!",0

.code

  start:
        stdcall ShowMessageOne,message
        stdcall ShowMessageTwo,message
        invoke  MessageBox,HWND_DESKTOP,message,caption,MB_OK
        invoke  ExitProcess,0


  proc ShowMessageOne,ptrMsg
        dummy dd ?           ; dummy doesn't work as local - .dummy does
work as local
        .dummy dd ?
  enter
        mov eax,[dummy]
        jmp xskip            ; .skip doesn't work
        invoke  MessageBox,HWND_DESKTOP,[ptrMsg],caption,MB_OK
        xskip:               ; .skip: doesn't work
  return


  proc ShowMessageTwo,ptrMsg ; shouldn't ptrMsg be a local variable?
        .ptrMsg dd ?         ; no complaint about this!
        .dummy dd ?
        .rc POINT
  enter
        mov eax,[.dummy]
        mov eax,[.rc.x]
        push caption
        pop [.ptrMsg]
        mov eax,[.ptrMsg]
        invoke  MessageBox,HWND_DESKTOP,eax,caption,MB_OK
  return

.end start   

-----------------------------------------

I now started using the asmwork IDE - in general I like it very much.


Two points seem to be considerable for me:

- (asmwork.asm) label wait_for_compiler: after #SetCursor...# I inserted
#invoke Sleep,10#. Otherwise compiling takes 100% of both processors on my
dual board. It might be even useful to spend the compilation process an own
thread which notifies the windowproc when finished.

- perhaps it is possible that the asm-file which is loaded first is always
preselected as file to compile.
So in the settings there would be a input and an output setting. That would
make compilation handling easier when you correct mistakes in an included
asm-file and then try to compile it again (now you first have to select the
main file again before you can compile).


wolfgang

Hi, Tomas

By any change can tell me how to get the size of a variable?

Thanks for all your help!

PS. Did you ever got my Superclass zip file? Is it ok?

Sincerely,
          Alonso Murillo.

Hi Tomasz,
> The the official fasm 1.40 has been finally releaded:
> http://fasm.metro-nt.pl/
> http://fasm.sourceforge.net/
  Neat, I am downloading it now!

> This list had badly configured "Reply-To" address, the replies to emails
> from this list didn't go back here by default, I have just fixed it.
  Yes, I noticed that...thanks for fixing it.

> When we had a list a Yahoo! I had sent once small tutorial about adding
> a custom instructions to fasm. unfortunately I've lost that archived
> messages. If anybody has a copy of that tutorial, please send me it.
  I have just about every message still saved in Outlook, so if you can
describe it a bit more (or give me keywords that it contains that sets it
apart from other messages), I am pretty confident that I can find it and
send it to you.

  Actually, I just found it (I think, let me know if it isn't the one or if
you need a different message). I'm copy & pasting it here for you:

---------------------------------------------------------------------
Because my fasmGuide project won't probably be finished soon due to
my general lack of time, I'll at least send you some tips, how you can
add your custom instructions to flat assembler.

Example 1 - simple approach
---------------------------
Consider we want to have the "bignop" instruction, without any
arguments, which will generate 7 bytes of value 90h.
First step: add this name to the table, so fasm will recognize this
instruction. This name is 6 bytes long, so you should find
instructions_6 table and put there two new lines (remember to keep the
alphabetical order!):

db 'bignop',0
dw bignop_instruction-assembler

This will define our new instruction, saying the handler procedure is
bignop_instruction, and the additional parameter is zero.
Now, when fasm meets this instruction in preprocessed and parsed
source, it will jump to your handler (the bignop_instruction label),
with the additional parameter in AL register.
So the only thing left to do is to write this instruction handler. You
may add it to "assemble.inc", but the best solution is to create new
"custom.inc" file, and put "include 'custom.inc'" at the end of
"assemble.inc" file. If your editor can't handle text files larger than
64k, just write the following command at the DOS prompt:

echo include 'custom.inc' >> assemble.inc

Now create the "custom.inc" file, and put the bignop_instruction
handler there:

bignop_instruction:
        mov     al,90h
        mov     ecx,7
        rep     stos byte [edi]
        jmp     instruction_assembled

This handler will just generate 7 bytes of code, without reading any
arguments, and then pass the control back to assembler. Every
instruction handler should be ended with this jump.

Now recompile the fasm and try the new instruction! ;)

Example 2 - argument processing
-------------------------------
Now we will add the "varnop" instruction, wchich will expect an
argument being a number specifying the length of the instruction.
The instruction handler is:

varnop_instruction:
        lods    byte [esi]
        cmp     al,'('
        jne     invalid_argument
        cmp     byte [esi],'.'
        je      invalid_value
        call    get_dword_value
        mov     ecx,eax
        mov     al,90h
        rep     stos byte [edi]
        jmp     instruction_assembled

This handler expects the number at ESI, so it loads a byte and
checks if it is a number expression (marked by a "(" byte). If it
isn't, jumps to the error handler (look at "errors.inc" to see what
errors can be handler, you can also add your own - it's simple).
Also, if the second byte is "." it means this is floating point
number, and we don't want it. Then we can call the "get_dword_value"
procedure with esi pointing to the first byte after "(" character, and
the whole expression is processed, the result number is stored in EAX
register. Now handler generates this count of NOPs and exits.

There are many procedures that will process arguments for you, here
is the list of the most useful of them:

1. When argument is a number, call one of the following procedures with
   ESI pointing to the first byte after "(":

    get_byte_value - returns number in AL
    get_word_value - returns number in AX
    get_dword_value - returns number in EAX
    get_pword_value - returns number in DX:EAX
    get_qword_value - returns number in EDX:EAX
    get_value - converts number of any type and returns it in EDX:EAX

2. When argument is a register, the first byte at ESI was 10h, load
   the second byte to AL and call:

   convert_register - accepts only general purpose registers, sets
                      the AH to size of register (1, 2 or 4) and AL
                      to the register code number

   convert_mmx_register - accepts only MMX registers, AH is set to
                          the register size (8 or 16) and AL to the
                          register code number

   These procedures set also the [argument_size] variable to the same
   value as AH register. If the [argument_size] is already set to
   something but 0, and sizes don't match, the error handler is
   called.
   You can also process the second byte manually, you can see the
   possible second byte values looking at the "symbols" table in
   "tables.inc" file.

3. To process size overrides, after loading the first byte of an
   argument into AL call get_size_operator procedure. If there is
   a size override, it set the [argument_size] to proper value, and
   loads the first byte of next symbol into AL, otherwise it does
   nothing.

4. When argument is the memory (the first byte is "["), call the
   get_address procedure with ESI pointing to the first byte after
   "[". It will return an address value in EDX, base register code
   in BH, index register code in BL, index scale in CL, address
   size override in CH and the segment register code in
   [segment_register] variable. You can just pass the unchanged BX,
   CX and EDX registers to the store_instruction procedure, with
   [base_code] set to instruction code and [postbyte_register] set to
   the register code or instruction extension - the whole opcode will
   be generated then and stored at EDI. If [base_code] is set to 0Fh,
   the [extended_code] should contain the value of second opcode byte.

To make 16-bit version of instruction (regardless the "use16" or
"use32" setting), call the operand_16bit_prefix procedure before
generation an opcode. To make 32-bit version, call the
operand_32bit_prefix.

Please look at the various instruction handlers in "assemble.inc" for
the more complex examples.

Example 3 - common handler
--------------------------

We can make the common handler for the both of above instructions,
using the additional parameter field:

in "tables.inc":

db 'bignop',7
dw bignop_instruction-assembler

and

db 'varnop',0
dw bignop_instruction-assembler

in "custom.inc":

bignop_instruction:
        xor     ecx,ecx
        or      cl,al
        jnz     .store
        lods    byte [esi]
        cmp     al,'('
        jne     invalid_argument
        cmp     byte [esi],'.'
        je      invalid_value
        call    get_dword_value
        mov     ecx,eax
      .store:
        mov     al,90h
        rep     stos byte [edi]
        jmp     instruction_assembled

If the additional parameter is 0, it reads the count argument,
otherwise it uses the AL as a count.

Have a nice customizing!

--
Tomasz Grysztar
---------------------------------------------------------------------



Sincerely,
Brian Becker

Shall we accept good from God, and not trouble?

---
Outgoing mail is certified Virus Free by AVG
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.372 / Virus Database: 207 - Release Date: 6/20/2002

The the official fasm 1.40 has been finally releaded:
http://fasm.metro-nt.pl/
http://fasm.sourceforge.net/
The documentation is still not finished, and won't be finished soon, so I
have decided to release it in the current state, it has it's own version
numbering, so you'll know when it's modified. If someone wants to help
finishing the sections about FPU/MMX instructions, he's welcome to.
There were some people offering help but I haven't got more response from
them.

This list had badly configured "Reply-To" address, the replies to emails
from this list didn't go back here by default, I have just fixed it.

When we had a list a Yahoo! I had sent once small tutorial about adding
a custom instructions to fasm. unfortunately I've lost that archived
messages. If anybody has a copy of that tutorial, please send me it.

-- 
Tomasz

> section '.data' data readable writeable

> numberone  dt ?
> numbertwo  dt ?

> section '.code' code readable executable

>   mov  [numberone],125.236

The size of tword data is 10 bytes, there is no mov instruction that
can transef 10 bytes. But you can use floating point values of smaller
sizes (dword, qword):

numberone dd ?

mov [numerone],125.236

-- 
Tomasz

Hi Alsono,
> Greetings to every body in FASM group, can some body help me,
> i wrote the following code:
  I can try if you don't mind me being wrong every once in a while (mabye
more often!).

> section '.data' data readable writeable
>
> numberone  dt ?
> numbertwo  dt ?
>
> section '.code' code readable executable
>
>  mov  [numberone],125.236

> But on this last line of code i get an invalid size of operand
> error when i try to assign a value to the floating point
> variable, can any body tell me what i am doing wrong!
  I know exactly how you feel. I wanted to do this quite a while ago and
spent several hours searching online for a solution. The only thing I came
up was to store each new number in the '.data' section of the program, like
so:

 section '.data' data readable writeable

 numberone  dt ?
 numbertwo  dt ?
 TempNumber1 dt 125.236

 section '.code' code readable executable

  FINIT
  FLD tword[TempNumber1]
  FSTP tword[numberone]

 Alternatively, you can probably make a macro that does this automatically
(I've seen some macros for MASM that do such a thing).

  That's about the extent of my knowledge; perhaps somebody else can prove
me wrong and tell you a better way (which would be nice).

Sincerely,
Brian Becker

Shall we accept good from God, and not trouble?

---
Outgoing mail is certified Virus Free by AVG
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.372 / Virus Database: 207 - Release Date: 6/20/2002

Greetings to every body in FASM group, can some body help me, i wrote the
following code:

section '.data' data readable writeable

numberone  dt ?
numbertwo  dt ?

section '.code' code readable executable

  mov  [numberone],125.236

But on this last line of code i get an invalid size of operand error when i
try to assign a value to the floating point variable, can any body tell me
what i am doing wrong!

Thanks!

Sincerely,

               Alonso Murillo

Does anyone have an example of a Windows DLL that has exports? Also, how do 
you call _cdecl DLLs in Fasm?

How do you sendmessages to a listbox, in c++ you have to use (LPARAM)string 
to send it, but how can I do that in Fasm?

Hi Tomasz,

I have symbols like this:

                                 MOV             P32 
[SIGNAL.TYPE],.MSG.NOTMAPPED
.._IMPORT_SIGNAL_051 =                          $-8

                                 MOV             P32 [SIGNAL.CNT],ECX
.._IMPORT_SIGNAL_063 =                          $-4


When I have few tens of such symbols (differing only in the terminating 
part), FAsm says:

---

flat assembler  version 1.39
error: code cannot be generated.

---

After some experimenting, I found this even more weird fix:

                                 MOV             P32 
[SIGNAL.TYPE],.MSG.NOTMAPPED
.._IMPORT_SIGNAL_051 =                          $-8
.._IMPORT_SIGNAL_051 =                          .._IMPORT_SIGNAL_051

                                 MOV             P32 [SIGNAL.CNT],ECX
.._IMPORT_SIGNAL_063 =                          $-4
.._IMPORT_SIGNAL_063 =                          .._IMPORT_SIGNAL_063

---

Q1: Will the above produce correct code at least?
Q2: Is there a real fix for this problem?

---

PS: I played a bit more and found the error: there's a limit ( = 100 ) in 
the maximum number of passes of ASSEMBLE.INC. I increased it to 255 
(because it's stored in a byte.. I didn't remove the limit check code 
because the variable is referenced elsewhere, so it may not work anyway) 
and reassembled the FAsm source.

Tomasz: it appears unnecessary to add passes for things like the above.. as 
also proven by the fix of the extra "symbol = symbol" solution. Nor it 
would be wise to limit the maximum number of *practically* usable symbols. 
I can imagine that equ may require additional passes in such cases.. but 
"=" should really not, in my understanding of how FAsm internally works.

Please don't limit FAsm in such ways.

Greets,
Fabio

> See my little dummy prog
>         org 100h
>         use16
> ;In this line I've got "Value out of range"
> ;why?
>         display kk
> blad:
>         mov ah,4ch
>         int 21h
> macro display slowo
> {
>         mov ah,9eh
>         mov dx,slowo
>         int 21h
> }
> error db 'Error Ocurred$'
> kk db 'Hi!$'
> Where is the problem?

You should define macro before you use it. "display kk" is here
interpreted as a built-in "display" directive, which needs bytes or
string as an arguments, and the kk is larger than byte (because it's
above 100h due to the "org" directive) that's why you've got
"value out of range" error. If the kk was less than 100h, you'd have
simply this byte displayed at compile time and no code generated
before "mov ah,4ch".
  To do what you wanted, simply move the macro definition to
the beginning of your source.
  This happens only with preprocessor symbols (macros and equ's),
labels and constants can be accessed from anywhere.

-- 
Tomasz

Hi!
See my little dummy prog
	org 100h
	use16
;In this line I've got "Value out of range"
;why?
	display kk
blad:
	mov ah,4ch
	int 21h
macro display slowo
{
	mov ah,9eh
	mov dx,slowo
	int 21h
}
error db 'Error Ocurred$'
kk db 'Hi!$'
Where is the problem?
Bye.

It would be nice if one could use inside INCLUDE's filenames an environment 
variable.

For example, if we know that the environment variable FAsm is set to 
E:CodingFAsm, it would be nice to be able to do:

INCLUDE "%FAsm%MyEquatesAndSymbols.INC"

and/or to be able to specify at the command line (e.g. from a batch file) 
an extra file to be included before the source.

Greets,
Fabio