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Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!purdue!decwrl!sun!pitstop!tm
From: tm@pitstop.UUCP (Takis Mercouris)
Newsgroups: comp.unix.wizards,misc.legal
Subject: Re: Assembly debugging in dbx
Message-ID: <386@pitstop.UUCP>
Date: 2 Feb 89 18:47:15 GMT
References: <836@infmx.UUCP>
Reply-To: tm@pitstop.UUCP (Takis Mercouris)
Followup-To: comp.unix.wizards
Organization: Sun Microsystems, Inc., Mountain View, CA.
Lines: 69

In article <836@infmx.UUCP> dror@infmx.UUCP (Dror Matalon) writes:
>
>	How does one specify the last  assembly level location displayed in 
>dbx ?
>
> .....stuff deleted....
>
>In dbx the following prints the 10 instructions from the current location:
>(*(&$pc))/10i
>but I don't know of a way to display an additional 10 instructions.
>
>    According to the dbx Man pages:
>
>     address / [count ] [ mode ]
>            Display the contents of memory starting at the  first
>            (or  current)  address  up  to the second address, or
>            until count items have been  displayed.  If no address is
>	    specified, the address following the one displayed most 
>	    recently is used.
>
>so it seems like /10i should do it. Unfortunatly dbx interprets / as the 
>search command and looks for the string "10i".
>	

I have included a sample dbx session to show how I display assembly
instructions starting from an address other than the current one.

-takis
tm@sunbird.Sun.COM

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Script started on Thu Feb  2 12:40:23 1989
dbx foo
Reading symbolic information...
Read 51 symbols
(dbx) stop in main
(1) stop in main
(dbx) run
Running: foo 
stopped in main at line 11 in file "foo.c"
   11       i=10;
(dbx) (*(&$pc))/8i
main+0xe:               movl    #0xa,a6@(-4)
main+0x16:              movl    #0x14,a6@(-4)
main+0x1e:              movl    #0x1e,a6@(-4)
main+0x26:              movl    #0x28,a6@(-4)
main+0x2e:              movl    #0x32,a6@(-4)
main+0x36:              movl    #0x3c,a6@(-4)
main+0x3e:              movl    #0x46,a6@(-4)
main+0x46:              movl    #0x50,a6@(-4)
(dbx) &main+0x2e/8i
main+0x2e:              movl    #0x32,a6@(-4)
main+0x36:              movl    #0x3c,a6@(-4)
main+0x3e:              movl    #0x46,a6@(-4)
main+0x46:              movl    #0x50,a6@(-4)
main+0x4e:              movl    #0x5a,a6@(-4)
main+0x56:              moveq   #0x0,d0
main+0x58:              unlk    a6
main+0x5a:              rts
(dbx) quit
CNTRL-D
script done on Thu Feb  2 12:41:50 1989
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-- 

--------------------
Takis Mercouris
tm@sunbird.Sun.COM