RSM

Resume from System Management Mode

참고 사항

Instruction Operand Encoding

Description

Returns program control from system management mode (SMM) to the application program or operating-system procedure that was interrupted when the processor received an SMM interrupt. The processor's state is restored from the dump created upon entering SMM. If the processor detects invalid state information during state restora-tion, it enters the shutdown state. The following invalid information can cause a shutdown:

• Any reserved bit of CR4 is set to 1.

• Any illegal combination of bits in CR0, such as (PG=1 and PE=0) or (NW=1 and CD=0).

• (Intel Pentium and Intel486(tm) processors only.) The value stored in the state dump base field is not a 32-KByte aligned address.

The contents of the model-specific registers are not affected by a return from SMM.

The SMM state map used by RSM supports resuming processor context for non-64-bit modes and 64-bit mode.

See Chapter 34, "System Management Mode," in the Intel(R) 64 and IA-32 Architectures Software Developer's Manual, Volume 3C, for more information about SMM and the behavior of the RSM instruction.

Operation

ReturnFromSMM;
IF (IA-32e mode supported) or (CPUID DisplayFamily_DisplayModel = 06H_0CH )
    THEN
          ProcessorState <- Restore(SMMDump(IA-32e SMM STATE MAP));
    Else
          ProcessorState <- Restore(SMMDump(Non-32-Bit-Mode SMM STATE MAP));
FI

Flags Affected

All.

Protected Mode Exceptions

#UD

• If an attempt is made to execute this instruction when the processor is not in SMM.

• If the LOCK prefix is used.

Real-Address Mode Exceptions

Same exceptions as in protected mode.

Virtual-8086 Mode Exceptions

Same exceptions as in protected mode.

Compatibility Mode Exceptions

Same exceptions as in protected mode.

64-Bit Mode Exceptions

Same exceptions as in protected mode.

첫 댓글을 달아주세요!

강좌에 관련 없이 궁금한 내용은 여기를 사용해주세요

다음으로 로그인

또는 직접 입력하세요 (댓글 수정시 비밀번호가 필요합니다)

댓글 달기

댓글을 불러오는 중입니다..