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freedos-specific problems #26

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stsp opened this issue Oct 4, 2018 · 3 comments
Closed

freedos-specific problems #26

stsp opened this issue Oct 4, 2018 · 3 comments

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@stsp
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stsp commented Oct 4, 2018 •
edited

Tracking bug.

dosemu2/dosemu2#50
https://github.com/stsp/dosemu2/blob/devel/src/dosext/misc/xms.c#L128
dosemu2/dosemu2#478

@andrewbird I've seen you were reporting some
bugs to the original freedos kernel, and even with
patches. How about moving them here and testing
your patches? Redirector works long ago, everything
is set and ready for a try.
@andrewbird
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Sorry, I missed this as I haven't been watching for a while. I'll try out my patch later.

stsp added a commit that referenced this issue Dec 7, 2018
@stsp
kernel: fix startup stack location [#26]
a21e02f 
init_tos includes init_text, init_data, init_bss and init_stack.
Don't add init_text size the second time.
This fixes the crash with UMB at A0 as the stack then clashes
with this UMB.
@dosemu2 dosemu2 deleted a comment from andrewbird Dec 14, 2018
@dosemu2 dosemu2 deleted a comment from andrewbird Dec 14, 2018
@dosemu2 dosemu2 deleted a comment from andrewbird Dec 14, 2018
@dosemu2 dosemu2 deleted a comment from andrewbird Dec 14, 2018
@dosemu2 dosemu2 deleted a comment from andrewbird Dec 14, 2018
@dosemu2 dosemu2 deleted a comment from andrewbird Dec 14, 2018
@dosemu2 dosemu2 deleted a comment from andrewbird Dec 14, 2018
@dosemu2 dosemu2 deleted a comment from andrewbird Dec 14, 2018
@dosemu2 dosemu2 deleted a comment from andrewbird Dec 14, 2018
@dosemu2 dosemu2 deleted a comment from andrewbird Dec 14, 2018
@dosemu2 dosemu2 deleted a comment from andrewbird Dec 14, 2018
stsp added a commit that referenced this issue Dec 24, 2018
@stsp
Revert "kernel: fix startup stack location [#26]"
263514f 
This reverts commit a21e02f.
stsp added a commit that referenced this issue Dec 24, 2018
@stsp
fix init_tos bug again hope now properly [fixes #46 #26]
f961069 
It seems the problem was in freedos's linker script.
stsp added a commit that referenced this issue Jan 13, 2019
@stsp
config: fix build of UMB chain [#26]
8d70da7 
Add every new MCB as MCB_LAST, instead of MCB_NORMAL.
With MCB_NORMAL as last MCB, there is a problem: prev_mcb()
may "complete" the chain by finding the MCBs from previous
boot, unless memset()ed by dosemu:
https://github.com/stsp/dosemu2/blob/devel/src/dosext/misc/xms.c#L128
In this case umb_prev appears to be a link even when inserting
above umb_max, and umb_next==umb_seg, after which umb_seg is
overwritten with a link.
Assertion is added to make sure umb_prev is not link when
inserting above umb_max.
@stsp
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stsp commented Jan 13, 2019

I think everything here is fixed.

@stsp stsp closed this as completed Jan 13, 2019
@stsp
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stsp commented Jan 13, 2019

And I'd say we are quite low on a bug count here,
so there are hopes to get out of beta this year. :)

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@andrewbird @stsp