[HECnet] Disassembling DEC C routines

[Johnny Billquist]

Mark, I don't understand the question.

You have already shown the resulting disassembled code for that C.

Are you asking about how to get the disassembled code for the C library routine?

Ah! Read through the thing again, and it seems you are indeed looking for the disassembly of the library routines.
Well, I guess you want a disassembler for that. Check if there aren't any in the DECUS library perhaps?

By the way. There is no guarantee that DECC$STRCPY is written in C. But a disassembly will only give you VAX assembler anyway.

	Johnny

On 2011-03-13 21:58, Mark Wickens wrote:
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.


-- 
Johnny Billquist                                   || "I'm on a bus
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