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From:	"Joel Saunders" <jbs30000 AT aol DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Inline assembly.
Date:	Mon, 28 Jan 2002 15:27:19 +0000 (UTC)
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I don't have any experiance usign inline assembly in DJGPP because for
one thing, I've only used Intel syntax, not AT&T, and secondly, I've
never done PMode programming, only real mode.  But I'm trying to learn
this so I thought I'd try a simple string moving routine.  I get two
errors when I try using this.  I'll show my routine, and below it, the
errors.
#include <crt0.h>
#include <sys/nearptr.h>
int _crt0_startup_flags = _CRT0_FLAG_NEARPTR;
char *Screen_PTR = (char *)(0xB8000 + __djgpp_conventional_base);
char My_Name[8] = {"J O E L"};
main(void)
{
        __asm__("
                 movw My_Name, %si
                 movw Screen_PTR, %di
                 movw $7, %ecx
                 movsb
        ");
        return 0;
}
-[_]--------------------------- Message Window --------------------
 Creating: nptest.exe
 Error: nptest.o: In function `main':
 nptest.cpp(6) Error: undefined reference to `My_Name'
 Error: nptest.cpp(.text+0xd): undefined reference to `Screen_PTR'
 There were some errors

What did I do wrong?


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