Mark, IIRC VAX compilers have an option that lists the assemblycode. It's either an option for /LIST or /OUTPUT. For C the included libraries may be omitted, again a switch for the CC command Hans ------Origineel bericht------ Van:Mark Wickens Afzender:owner-hecnet at Update.UU.SE Aan: hecnet at Update.UU.SE Aan: msw at hecnet.eu Beantwoorden:hecnet at Update.UU.SE Onderwerp: [HECnet] Disassembling DEC C routines Verzonden: 13 maart 2011 21:58 Guys, Purely out of interest, how would I diassemble a DEC C routine on VAX/VMS? Can I use DEBUG to do this? For example, I have the following code: #include <stdio.h> #include <string.h> void main(int argc, char **argv) { char to[32]; strcpy(to, "Hello World!\n"); printf(to); } If I use BUBBLE$ cc/list/machine_code strcpy.c I get the following: 1 1267 strcpy(to, "Hello World!\n"); D6 AF 9F 0027 pushab $CODE D8 AD 9F 002A pushab -40(fp) 00000000* EF 02 FB 002D calls #2,DECC$STRCPY Note that the call to DECC$STRCPY is listed, but not the code in the routine. I'm interested in how some of the C library routines are implemented at a machine code level from an academic point of view. Regards, Mark. Verzonden vanaf mijn draadloze BlackBerry -toestel