Messages in this thread | | | From | Arnd Bergmann <> | Subject | Re: 2.6.12-rc1 breaks dosemu | Date | Sat, 26 Mar 2005 14:49:44 +0100 |
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On Sünnavend 26 März 2005 09:18, Bart Oldeman wrote: > On Sat, 26 Mar 2005, Arjan van de Ven wrote: > > > > eip: 0x000069ee esp: 0xbfdbffcc eflags: 0x00010246 > > > > hmm interesting. Can you check if at the time of the crash, the esp is > > actually inside the stack vma? If it's not, I wonder what dosemu does to > > get its stack pointer outside the vma... (and on which side of the vma > > it is)
The esp value is always slightly below the stack vma and above ld.so. Running it a few times gives
stack VMA crash esp bfc8f000-bfca4000 bfc5ffcc bffa0000-bffb7000 bff5ffcc bfe0c000-bfe23000 bfdbffcc bf7ff000-bf814000 bf7bffcc bfaa9000-bfabe000 bfa5ffcc bfaa9000-bfabe000 bfa5ffcc bffc5000-bffda000 bff7ffcc bfba9000-bfbbf000 bfb5ffcc bf865000-bf87b000 bf81ffcc bfe7d000-bfe92000 bfe3ffcc ... bff9f000-bffb4000 bff5ffcc bfc73000-bfc89000 bfc3ffcc bffe3000-bfff8000 -> works
> To Arnd: > > Another thing you should probably do is to build dosemu with debug > information, and then look into ~/.dosemu/boot.log after it crashes. > That will give you the contents of /proc/self/maps, a gdb backtrace and > various other goodies. > > I've checked it myself but can't reproduce, neither with plain dosemu > 1.2.2 nor with current CVS.
I'm using the dosemu-1.2.1-3 binary that currently comes with debian sarge, and would prefer not having to build a new dosemu. As far as I can tell, the command.com that is started belongs to freedos, not comcom. The crash however does happen shortly after the command.com file is opened.
Arnd <>< - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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