Date: Mon, 26 Jul 1999 09:39:26 +0300 (IDT) From: Eli Zaretskii X-Sender: eliz AT is To: "Cesar S. Rabak" cc: djgpp AT delorie DOT com Subject: Re: Bizarre debugging format problem In-Reply-To: <3.0.6.32.19990725202728.007d5ea0@dce03.ipt.br> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Reply-To: djgpp AT delorie DOT com X-Mailing-List: djgpp AT delorie DOT com X-Unsubscribes-To: listserv AT delorie DOT com Precedence: bulk On Sun, 25 Jul 1999, Cesar S. Rabak wrote: > >> Exiting due to signal SIGINT > >> Control-Break Pressed at eip=00010ce6 > >> eax=00000000 ebx=00000021 ecx=00000000 edx=0000000e esi=00000054 > >> edi=000643ac > >> ebp=0006439c esp=00064390 program=D:\DEVELOP\TEST\DBGINFO\TESTIT > >> cs: sel=00ef base=83231000 limit=0007ffff > >> ds: sel=00f7 base=83231000 limit=0007ffff > >> es: sel=00ff base=83231000 limit=0007ffff > >> fs: sel=0117 base=00015bf0 limit=000028ff > >> gs: sel=0107 base=00000000 limit=ffffffff > >> ss: sel=00f7 base=83231000 limit=0007ffff > >> > >> Call frame traceback EIPs: > >> 0x00010ce6 ___dpmi_int+114 > >> 0x0000da99 _getch+49 > >> 0x00001de1 _main+29 > >> 0x0000d0aa ___crt1_startup+138 > > > >This seems to indicate that there's a real problem with line-number > >info in this program: symify didn't print them as well. Could you > >please make this binary available for downloading, or send it to me? > >I want to look into it some more. > > > >This traceback also shows that you still use v2.01 library. Why? > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > > Will you pardon, but _how_ do we figure this in the traceback? There are two telltale signs: - The limit of the segment whose selector is loaded into GS is -1. Since we are inside __dpmi_int, GS likely holds the _dos_ds selector (library functions that communicate with DOS/BIOS call a special variant of _farptr functions which use the GS register instead of FS). _dos_ds had a limit of -1 in v2.01, whereas v2.02 resets it back to 1MB+64KB. - The stack dump in v2.02 and later includes an additional line with stack limits, right below the registers' dump, like this: App stack: [00391054..00311054] Exceptn stack: [0018b0e0..001891a0]