Re: [Clax86list] Syscall interface

On Tue, 25 Apr 2006 05:07:01 +0100, Charles A. Crayne <spamtrap@xxxxxxxxxx> wrote:

On Mon, 24 Apr 2006 14:15:47 +0100
"Thomas Worthington" <spamtrap@xxxxxxxxxx> wrote:

:I've written a Forth compiler in assembly using the old Int80 mechanism
:and I want to convert to the new system, which I'm told is faster and
:cleaner but I can't find any useful info on accessing it via AL.

I use the system call interface when programming in assembler under Linux,
and it has indeed changed a lot over the years. The number of functions is
now nearing 300, and some of the old calls have been replaced with newer
versions. However, ultimately, they are all invoked by int 80h, so I don't
understand what you are asking for. Please give me a few more clues.

Linus said this in the discussion about the cross-platform virus:

'To make it even harder to hit - it probably also only happens with the old "int 0x80" system call mechanism, not with the modern "syscall" entrypoint.'

There have been various hints over the years that 0x80 is no longer the prefered method, for performance reasons, but I've not seen any documentation on what assembly language programmers need to do to access the "modern" entrypoint.

TWW

.

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