[obsolete / fixed] PageFault bug DOS IDE on 67.29 & 67.3

Index > Compiler Internals > [obsolete / fixed] PageFault bug DOS IDE on 67.29 & 67.3

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DOS386

Joined: 08 Dec 2006
Posts: 1905

DOS386 16 Feb 2009, 08:36

When trying to compile (CTL-F9) my BuggyCodeEx (R) Laughing

, FASM DOS IDE crashes. No problem in DOS commandline or Win32 IDE. Probably it's a problem with the error from the core arriving in the IDE, and specific to this piece of code (sent by PM). Other bugs usually don't cause a crash. After fixing the bug this crash doesn't occur anymore. Both CWSDPMI and HDPMI32.

Last edited by DOS386 on 24 Feb 2009, 01:13; edited 1 time in total

16 Feb 2009, 08:36

Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 8390
Location: Kraków, Poland

Tomasz Grysztar 16 Feb 2009, 09:21

It would be useful if you also provided EIP value of the pagefault.

16 Feb 2009, 09:21

Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 8390
Location: Kraków, Poland

Tomasz Grysztar 16 Feb 2009, 17:02

Quick fix - in FASMD.ASM around 4180 line:

Code:

      quoted:
        call    peek_character
        jc      no_more_lines
        cmp     al,ah
        jne     quoted
        call    peek_character
        jc      no_more_lines
        cmp     al,ah
        je      quoted
        dec     esi ; <- replace ESI with EDI here
        xor     edx,edx
        jmp     check_for_more_lines

Will be fixed in the next update (I plan to do some more work on FASMD soon).

16 Feb 2009, 17:02

DOS386

Joined: 08 Dec 2006
Posts: 1905

DOS386 18 Feb 2009, 07:05

> would be useful if you also provided EIP value

SORRY Sad

I had thought you would want to crash it yourself anyway ...

> Quick fix - in FASMD.ASM around 4180

COOL Smile

Indeed fixes the offending code Smile

Just a 1 Byte fix again Laughing

> I plan to do some more work on FASMD soon

Smile

Can get unsticked ... and maybe this could get killed finally: http://board.flatassembler.net/topic.php?t=8677 + (or at least) shadow link in IDE Development.

18 Feb 2009, 07:05

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