[ros-dev] SYSCALL instruction

[Waldo Alvarez Cañizares]

Hi Martin:
 
Last time I saw it no I haven't checked in a while), but I guess my answer should be not yet since I have not seen any discussion about that on the list until now that you ask. If you want to be sure check ntdll (the interface is machine generated so you need to check the program that builds it, what I remember is that it generated an .asm, you can also check the asm after you build the system). Also the ROS build system needs sub architectures configurable to use this one since this instruction is PII+ hey I bet we all know we are missing a lot of great stuff only implemented in more recent processors, SYSCALL is only one of them. Another thing that could be done is to detect the CPU at some time during initialization and use one of two ntdll (on with SYSCALL an another without it). The question is: should an installed ReactOS resist a CPU downgrade? Probably yes but most of the times is just a waste.
 
regards
Waldo

________________________________

From: ros-dev-bounces at reactos.com on behalf of Maritn "E.T." Misuth
Sent: Wed 12/22/2004 5:10 PM
To: ReactOS Development List
Subject: [ros-dev] SYSCALL instruction



Does ReactOS use optimized SYSCALL instruction on modern processors when
invoking kernel functions?
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