Changes between Initial Version and Version 1 of DevelopersFAQ

Timestamp:

Aug 4, 2007, 5:40:47 PM (17 years ago)

Author:

guest

Comment:

--

DevelopersFAQ

@@ +1 @@
+= DevelopersFAQ =
+
+Here you can find answers to some of the most frequently asked questions about development of FM/2.  If you have 
+
+a question not answered on this page, you can ask it at 
+
+http://tech.groups.yahoo.com/group/fm2/
+
+----
+[[PageOutline(2-6,,inline)]]
+----
+
+== Trouble Shooting == #trouble-shooting
+
+=== How to find the source code for a trap? ===
+
+The OpenWatcom maps does not provide the source line detail that the VAC
+maps provided, so the procedure for locating the trapping source code line
+changes a bit, but it's still reasonable easy.
+
+Grab the object:offset value for the failing cs:eip from popuplog.os2.
+
+Sort the memory map section of fm3dll.map.
+
+FInd the function containing the trapping object:offset value.
+
+Calculate the offset from the function start to the object:offset value.
+
+Determine the source file for the function containing the trapping
+function.
+
+Run
+
+wdis -l -s filename.obj
+
+where filename is the source file base name. This will create
+filename.lst.
+
+Find the failing function in filename.lst
+
+Find the calculated offset.
+
+This is the line that trapped.
+
+There will be labels of the form L$289. These are relative to the
+function start so it's easy to find the matching source code in filename.c
+
+=== When the trap is in the watcom libraries, how can I trace it back to the actual call in the source? === 
+
+For this you need a trap dump file. Then you can let pmdf do the work.  You need my mapsymw.pl to convert the 
+Watcom map file to something pmdf can use.  To get my mapsymw.pl, you can contact me at
+
+Steven H. Levine[[BR]]
+steve53@earthlink.net
+
+You can also use the Watcom debugger. It can give you a call trace too.
+
+----