From:	eplmst AT lu DOT erisoft DOT se (Martin Stromberg)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Problems with protected_mode_int
Date:	13 Jan 2000 07:26:51 GMT
Organization:	Ericsson Erisoft AB, Sweden
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Prashant TR (prashant_tr AT yahoo DOT com) wrote:
: On 12 Jan 2000, Martin Stromberg wrote:

: > : You can't run an interrupt handler in a stack. Use _my_cs(). Although
: > : both SS, DS and CS have the same base, they have different access rights.
: > 

: > Yes, you can (at least theoretically).

: Could you explain this in more detail?

Something like this:

asm("
my_handler:
...

my_handler_end:
");

int main()
{
  unsigned char code[1000];

  memcpy(code, &my_handler, my_handler_end - my_handler);

  lock(code, my_handler_end - my_handler);
  installhandler(code);

}


Shostakovich, String Quartet 14,

							MartinS

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