Date: Thu, 13 Jun 1996 13:05:23 +0200 (METDST) From: Robert Hoehne To: DJGPP workers Subject: Improvements for GDB Message-Id: Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Because I want to integrate GDB in an other program (RHIDE), I needed the ability of GDB to restart the debugged program, without restarting GDB. Now I found (probably not the best) a solution for this. I will include here not the diffs, because the file 'go32target.c' has many non 7-bit characters, but some facts and questions. 1) I modified the the file 'v2load.c' in the way, that I can access the variables, which hold the allocated selectors and DOS memory from outside the function. 2) I wrote a function (called 'v2unloadimage'), which frees the selectors and DOS memory, which were allocated by 'v2loadimage'. 3) In the 'go32target.c' file for GDB I changed some minor things to allow reloading the image after a kill. Now the problems: 4) The main problem with unloading an image is in free the memory it used. The only solution I found for doing this is calling the function '_exit' of the image, which clears all the memory it used. Question: Can I assume, that every DJGPP V2 program has this function to do the correct cleanups? 5) What is, when I want to debug a program with no debug information? 6) What is, when the debugged program hooks some interrupts? 5) Has anybody an other ideas to solve the problems under 4) in a different way? Robert ***************************************************************** * Robert Hoehne, Fakultaet fuer Mathematik, TU-Chemnitz-Zwickau * * Post: Am Berg 3, D-09573 Dittmannsdorf * * e-Mail: Robert DOT Hoehne AT Mathematik DOT TU-Chemnitz DOT DE * * WWW: http://www.tu-chemnitz.de/~rho * *****************************************************************