DOS ain't dead - CC386 -> SingleFault -> DoubleFault -> TripleFault -> BOOM

CC386 -> SingleFault -> DoubleFault -> TripleFault -> BOOM (Announce)

posted by DOS386, 17.02.2011, 09:20
(edited by DOS386 on 18.02.2011, 03:53)

> 3.89 is out 2011-Feb-13 ... I'll test

Done! :-)

+ [0] BIG crash from 3.88 is fixed (apparently specific to DFLAT thus INSTALLER + INFOPAD)

+ [1] compiler core works (some warnings, but examples do compile and run)

+ [2] INFOPAD improvements look good

-- [3] BIG problem: CTL-BREAK causes beeper + TripleFault, in 3.89 still in, affects all binaries (at least INFOPAD and VALX, new BUG, no problem in 3.74, CTL-C still works in INFOPAD, as opposed to FP IDE)

- [4] Tiny exit problem (related to [3] ?) - INFOPAD causes a beeper "NULL POinter" (without TripleFault) but sometimes only ...

- [5] INFOPAD Out-Of-Memory-BUG (related to [3] ?) when loading a huge file (cca 2/3 of RAM), it loads, but then "Out Of Memory", and then beeper + TripleFault

http://ompldr.org/vN2c4NA/INFOPAD.ZIP (280 KiB)

Fixed 3.88 crash:

00162265061e load_seg_reg(DS, 0x0006): RPL & CPL must be <= DPL 00162265155e load_seg_reg(DS, 0x0006): RPL & CPL must be <= DPL 00162722693e read_virtual_dword_32(): segment limit violation 00162722713e read_virtual_checks(): read beyond limit 00162722733e read_virtual_checks(): read beyond limit 00162722753e read_virtual_checks(): read beyond limit 00162722773e read_virtual_checks(): read beyond limit 00162722796e read_virtual_dword_32(): segment limit violation 00162722816e read_virtual_checks(): read beyond limit 00162722836e read_virtual_checks(): read beyond limit 00162722856e read_virtual_checks(): read beyond limit 00162722876e read_virtual_checks(): read beyond limit 00162722896e read_virtual_checks(): read beyond limit 00162722916e read_virtual_checks(): read beyond limit 00162722936e read_virtual_checks(): read beyond limit 00162722959e read_virtual_dword_32(): segment limit violation 00162722979e read_virtual_checks(): read beyond limit 00162722999e read_virtual_checks(): read beyond limit 00162723019e read_virtual_checks(): read beyond limit 00162723039e read_virtual_checks(): read beyond limit 00162723059e read_virtual_checks(): read beyond limit 00162723079e read_virtual_checks(): read beyond limit 00162723099e read_virtual_checks(): read beyond limit 00162723143e check_cs(0x0018): not a valid code segment !
...
00163688374e check_cs(0x0838): not a valid code segment ! 00163688374e interrupt(): segment not present 00163688374e interrupt(): segment not present 00163688374i CPU is in protected mode (active) 00163688374i CS.d_b = 16 bit 00163688374i SS.d_b = 32 bit 00163688374i EFER = 0x00000000 00163688374i | RAX=0000000000003b8b RBX=0000000000000000 00163688374i | RCX=0000000000000820 RDX=000000000015d89a 00163688374i | RSP=0000000000012c74 RBP=00000000001561e8 00163688374i | RSI=0000000000044aa0 RDI=0000000000000001 00163688374i | R8=0000000000000000 R9=0000000000000000 00163688374i | R10=0000000000000000 R11=0000000000000000 00163688374i | R12=0000000000000000 R13=0000000000000000 00163688374i | R14=0000000000000000 R15=0000000000000000 00163688374i | IOPL=0 id vip vif ac vm RF nt of df if tf sf zf af PF cf 00163688374i | SEG selector base limit G D 00163688374i | SEG sltr(index|ti|rpl) base limit G D 00163688374i | CS:0008( 0001| 0| 0) 00006c30 0000ffff 0 0 00163688374i | DS:0000( 0000| 0| 0) 00000000 00000000 0 0 00163688374i | SS:0820( 0104| 0| 0) 00000000 ffffffff 1 1 00163688374i | ES:0820( 0104| 0| 0) 00000000 ffffffff 1 1 00163688374i | FS:0818( 0103| 0| 0) 0015d99c 0000ffff 0 0 00163688374i | GS:0000( 0000| 0| 0) 00000000 00000000 0 0 00163688374i | MSR_FS_BASE:000000000015d99c 00163688374i | MSR_GS_BASE:0000000000000000 00163688374i | RIP=00000000000019df (00000000000019df) 00163688374i | CR0=0x60000011 CR2=0x0000000000000000 00163688374i | CR3=0x00000000 CR4=0x00000200 00163688374i 0x00000000000019df>> retf : 66CB 00163688374e exception(): 3rd (11) exception with no resolution, shutdown status is 00h, resetting

There are almost 10'000 protection violations before the thing finally desperates and TripleFaults ....

David Lindauber wrote:

> well it works in virtualbox...

Well, for me it (INFOPAD 3.88) "works" inside BOCHS too ... it crashes just like on real hardware, even the garbage on the screen is the same (it's just slower).

:-) There is only one reliable emulator and that's BOCHS :-)

(it's neither perfect nor BUG-free (I still have the mysterious XDMA-BUG, ...), and it's slow, nevertheless, it usually doesn't pretend buggy stuff to be BUG-free ...).

No BOCHS report of the CTL-BREAK-BUG.

I plan a big compiler core correctness and performance test (CC386 new vs CC386 old vs WATCOM vs DGJPP), but it might take some time.

EDIT : fixed BUG in BUG report (CTL-C vs CTL-BREAK)

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Complete thread:

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      - provirus heuristics == teh sux0rz | CC386 3.89 - DOS386, 14.02.2011, 09:47
        CC386 -> SingleFault -> DoubleFault -> TripleFault -> BOOM - DOS386, 17.02.2011, 09:20
        CC386 -> SingleFault -> DoubleFault ... fix in progress - DOS386, 21.02.2011, 09:56
        CC386 -> SingleFault -> DoubleFault ... fix in progress - DOS386, 24.02.2011, 08:32
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        CC386 4.10 2013-Jan-19 - DOS386, 03.02.2013, 18:35
- Orange C version 4.1.19 available - Japheth, 11.03.2011, 05:41
  - Orange C version 4.1.19 available - Khusraw, 04.11.2011, 20:37
    - Orange C version 4.1.19 available - Japheth, 05.11.2011, 08:29