From: mrwiggley AT aol DOT com (MrWiggley)
Newsgroups: comp.os.msdos.djgpp
Subject: Dissasember debugging bug?
Lines: 49
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Date: 9 Nov 1998 23:15:15 GMT
Organization: AOL http://www.aol.com
Message-ID: <19981109181515.00812.00001533@ng-fb2.aol.com>
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

I have a bit of a problem with RHIDE 1.4

The following two source files are in a .GPR file of mine...

#include <stdio.h>

extern unsigned int AddFour(unsigned int);

int main(void)
{
  printf("AddFour(4) = %i\n", AddFour(4));
  return 0;
}

[BITS 32]
[GLOBAL _AddFour]
[SECTION .text]
x_AddFour       equ 8

_AddFour:
	push ebp
	mov ebp, esp
	       
	mov eax, [ebp + x_AddFour]        
	add eax, 4

	mov esp, ebp
	pop ebp
	ret

Everything comples and runs fine, but try placing a breakpoint on the printf
line, running the program, then opening the dissasembler.  Press F8 to get to
the "call AddFour" instruction, then press F7.  This will bring you to the
disasembly of the AddFour funciton.  Press F8, and the program crashes. 
However, if you move the cursor down to say, "mov eax, [ebp + x_AddFour", and
press F4, everything works fine!  

I am suspecting the problem is that rhide debugger debugger is not setting some
registers properly when it transfers control back to the program.  But I'm not
experienced programmer, just an amatuer that's pulling his hairs out by the
roots.  I've got a routine in a larger program where I first noticed this
problem.  Doing any complicated ASM whatsoever is impossible without a debugger
that works.

Of course, I could be being stupid, so if I am, please let me know.  If you
don't mind, could you email me with a solition if one exists? 
(mrwiggley AT aol DOT com)

Thanks everbody.