From: jrubin AT BIX DOT com
Date: Thu, 18 Jul 1996 23:27:46 -0400 (EDT)
Subject: info.exe crash
To: eliz AT is DOT elta DOT co DOT il, djgpp AT delorie DOT com, sandman AT clio DOT rice DOT edu
Message-id: <9607182327.memo.81325@BIX.com>
MIME-version: 1.0
Content-type: TEXT/PLAIN
Content-transfer-encoding: 8BIT

Hi Charles and Eli Z (sorry about using eliza before).

Here is all the information about the problem with
info.exe that I can think of. I'll be happy to do any tests
you want on my configuration, but for now I will avoid the
problem by *not* using info right after booting. Maybe something
similiar will happen on someone else's machine and you'll have
mmore information to go on.

Good Luck
Josh Rubin    jrubin AT bix DOT com


Problem: The command 'info' with no args crashes if performed
	 immediately after booting. I can not make it happen
	 if other programs that use dpmi are run first.

Urgency: Not urgent. I can avoid it by not using INFO first.

Symptoms:
	  Exiting due to signal SIGSEGV
	  General Protection Fault
	  <register and stack dump>
	[ Exiting due to signal SIGSEGV
	  Page fault at eip=0 ...
	  <register and stack dump>  ] ...

 The section in [...] repeats forever with decreasing ESP and EBP.

Repeatable:
  Yes - all the way down to register contents.
  Here are the details with a minimal configuration and all the
  useful info I can think of.

I deleted all djgpp version 1.xx software from disk.
Downloaded ftp.simtel.net/pub/simtelnet/gnu/djgpp/v2/txi360b.zip
Unpacked with
   cd djgpp
   pkunzip -d txi360b

*  Note to Eli: This copy of info.exe is identical to what I had.
*  You were wrong about the image size.
*  Check your version. Maybe something didn't get into the distribution.

Attached:
  config.sys
  autoexec.bat
  djgpp.env
  output of 'go32-v2'
  output of 'pkunzip -v txi360b info.exe'
  output of 'set'
  output of 'mem/debug'
  output of 'type manifest\*.ver'
  screen dump (manually recorded)

Hardware:
  40 Mhz 80386 DX, no '387
  4 Meg memory, 64K cache
  Ami Bios 6/6/92

  Verified that CMOS and the boot block have not been changed.
  'scandisk' finds no probems.

go32-v2 > go.txt
----
go32/v2 version 2.0 built Jan 23 1996 22:03:02
Usage: go32 coff-image [args]
Rename this to go32.exe only if you need a go32 that can run v2 binaries as
 well as v1 binaries (old makefiles).  Put ahead of the old go32 in your PATH.
DPMI memory available: 3256 Kb
DPMI swap space available: 131040 Kb
----

pkunzip -v txi360b info.exe
---
PKUNZIP (R)    FAST!    Extract Utility    Version 2.04g  02-01-93
Copr. 1989-1993 PKWARE Inc. All Rights Reserved. Shareware Version
PKUNZIP Reg. U.S. Pat. and Tm. Off.

þ 80386 CPU detected.
þ XMS version 3.00 detected.

Searching ZIP: TXI360B.ZIP

 Length  Method   Size  Ratio   Date    Time    CRC-32  Attr  Name
 ------  ------   ----- -----   ----    ----   -------- ----  ----
 155648  DeflatX  86817  45%  02-22-96  03:51  fee40e79 --w-  bin/info.exe
 ------          ------  ---                                  -------
 155648           86817  45%                                        1
---


c:\config.sys
-----
SWITCHES=/F
BUFFERS=15
SHELL=C:\DOS62\COMMAND.COM C:\DOS62\  /p
DEVICE=C:\DOS62\HIMEM.SYS
BUFFERS=35
FILES=30
LASTDRIVE=E
FCBS=4,0
-----

c:\autoexec.bat
-----
set TEMP=C:\TEMP
set TMP=C:\TEMP
path C:\DOS62;C:\SHARE;C:\DJGPP\BIN;C:\BORLAND;
prompt $p$g
:: Initialize DGGPP (v2.00)
c:\djgpp\bin\setdjgpp c:\djgpp c:/djgpp
-----

set > env.txt
-----
COMSPEC=C:\DOS62\COMMAND.COM
TEMP=C:\TEMP
TMP=C:\TEMP
PATH=C:\DOS62;C:\SHARE;C:\DJGPP\BIN;C:\BORLAND;
PROMPT=$p$g
DJGPP=c:/djgpp/djgpp.env
-----

type manifest\*.ver
----
djdev200 Development Kit and Runtime
gcc272b GNU GCC 2.7.2 for DJGPP V2
grep20b GNU grep 2.0 for DJGPP V2
bnu252b GNU binutils 2.5.2 for DJGPP V2
csdpmi2b CWSDPMI binary distribution (release 2)    <-------
csdpmi2s CWSDPMI source distribution (release 2)
djtst200 Test Programs
mak373b GNU Make 3.73 for DJGPP V2
find41b GNU findutils 4.1 for DJGPP V2
gdb412b GNU Debugger 4.12 for DJGPP V2
sed118b GNU sed 1.18 for DJGPP V2
djlsr200 Base Library Sources
dif271b GNU diff 2.7.1 for DJGPP V2
txi360b GNU texinfo 3.6 for DJGPP V2                <--------
-----

c:\djgpp\djgpp.env - unchanged from distribution
-----
#= Don't edit this line unless you move djgpp.env outside
#= of the djgpp installation directory.  If you do move
#= it, set DJDIR to the directory you installed DJGPP in.
#=
DJDIR=%:/>DJGPP%

+USER=dosuser
+TMPDIR=%DJDIR%/tmp
+EMU387=%DJDIR%/bin/emu387.dxe
+LFN=n

[bison]
BISON_HAIRY=%DJDIR%/lib/bison.hai
BISON_SIMPLE=%DJDIR%/lib/bison.sim

[cpp]
CPLUS_INCLUDE_PATH=%/>;CPLUS_INCLUDE_PATH%%DJDIR%/lang/cxx;%DJDIR%/include;%DJDIR%/contrib/grx20/include
C_INCLUDE_PATH=%/>;C_INCLUDE_PATH%%DJDIR%/include;%DJDIR%/contrib/grx20/include
OBJCPLUS_INCLUDE_PATH=%/>;OBJCPLUS_INCLUDE_PATH%%DJDIR%/include;%DJDIR%/lang/objc
OBJC_INCLUDE_PATH=%/>;OBJC_INCLUDE_PATH%%DJDIR%/include;%DJDIR%/lang/objc

[gcc]
COMPILER_PATH=%/>;COMPILER_PATH%%DJDIR%/bin
LIBRARY_PATH=%/>;LIBRARY_PATH%%DJDIR%/lib;%DJDIR%/contrib/grx20/lib

[info]
INFOPATH=%/>;INFOPATH%%DJDIR%/info
----

mem/debug > mem.txt
-------------
Conventional Memory Detail:

  Segment               Total        Name         Type
  -------          ----------------  -----------  --------
   00000              1,039    (1K)               Interrupt Vector
   00040                271    (0K)               ROM Communication Area
   00050                527    (1K)               DOS Communication Area
   00070              2,656    (3K)  IO           System Data
                                        CON       System Device Driver
                                        AUX       System Device Driver
                                        PRN       System Device Driver
                                        CLOCK$    System Device Driver
                                        A: - C:   System Device Driver
                                        COM1      System Device Driver
                                        LPT1      System Device Driver
                                        LPT2      System Device Driver
                                        LPT3      System Device Driver
                                        COM2      System Device Driver
                                        COM3      System Device Driver
                                        COM4      System Device Driver
   00116             42,816   (42K)  MSDOS        System Data
   00B8A             26,560   (26K)  IO           System Data
                      3,776    (4K)     XMSXXXX0  Installed Device=HIMEM
                      1,488    (1K)               FILES=30
                        256    (0K)               FCBS=4
                     18,624   (18K)               BUFFERS=35
                        448    (0K)               LASTDRIVE=E
                      1,856    (2K)               STACKS=9,128
   01206              4,720    (5K)  COMMAND      Program
   0132D                 80    (0K)  MSDOS        -- Free --
   01332                272    (0K)  COMMAND      Environment
   01343                176    (0K)  MEM          Environment
   0134E             88,992   (87K)  MEM          Program
   02908            487,296  (476K)  MSDOS        -- Free --

Memory Summary:

  Type of Memory       Total   =    Used    +    Free
  ----------------  ----------   ----------   ----------
  Conventional         655,360       78,992      576,368
  Upper                      0            0            0
  Reserved                   0            0            0
  Extended (XMS)     3,538,944       65,536    3,473,408
  ----------------  ----------   ----------   ----------
  Total memory       4,194,304      144,528    4,049,776

  Total under 1 MB     655,360       78,992      576,368

  Memory accessible using Int 15h      3,538,944  (3456K)
  Largest executable program size        576,272   (563K)
  Largest free upper memory block              0     (0K)
  The high memory area is available.

  XMS version  3.00; driver version  3.16
-------------

<Hardware reset>
       ...  I recorded this manually ...
C:>info
Exiting due to signal SIGSEGV
General Protection Fault at eip=0001ad76
eax=300  ebx=80000 ecx=70372 edx=7031a esi=70370 edi=79994
ebp=6b5fc esp=69d04 cs=00a7 ds=00af es=00af fs=008f gs=00bf ss=00af

Call frame traceback EIPs:
   0x0001ad76

Exiting due to signal SIGSEGV
Page fault at eip=0, error=0004
eax=0 ebx=6c000 ecx=0 edx=0 esi=17ad0 edi=17ae9
ebp=69c54 esp=69c48 cs=00a7 ds=00af es=00af fs=008f gs=00bf ss=00af

Call frame traceback EIPs:
   0x00000000
   0x00017f44
   0x00018098
   0x00018121
   0x00000300

Exiting due to signal SIGSEGV
Page fault at eip=0, error=0004 ....