system management mode การใช้

• In later processors, this evolved into System Management Mode.
• The system management mode makes it possible to shut down the processor without losing data.
• In particular, the System Management Mode ( SMM ) in Intel 386SL and later processors places the processor in unreal mode.
• System Management Mode can also be abused to run high-privileged rootkits, as demonstrated at Black Hat 2008 and 2015.
• In addition, the System Management Mode ( SMM ) ( the same mode introduced with i386SL ) was included with this processor.
• In 2009, together with a team member Rafal Wojtczuk, presented an attack against Intel Trusted Execution Technology and Intel System Management Mode.
• CSM also provides required legacy System Management Mode ( SMM ) functionality, called " CompatibilitySmm ", as an addition to features provided by the UEFI SMM . This is optional and highly chipset-and platform-specific.
• Some systems ( particularly newer Macintoshes and new editions of Microsoft Windows ) use Intel's system management mode . 16-bit BIOS interfaces are required by certain x86 operating systems, such as DOS and Windows 3.1 / 95 / 98 ( and all when not booted via UEFI ).
• "' System Management Mode "'( "'SMM "', sometimes called "'ring-2 "') is an operating mode of x86 central processor units ( CPUs ) in which all normal execution, including the operating system, is suspended and special separate software, which is usually part of the firmware or a hardware-assisted debugger, is executed with high privileges.