diff options
Diffstat (limited to 'src/arch/x86/miscregfile.cc')
| -rw-r--r-- | src/arch/x86/miscregfile.cc | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/arch/x86/miscregfile.cc b/src/arch/x86/miscregfile.cc index 71908098e..a01902478 100644 --- a/src/arch/x86/miscregfile.cc +++ b/src/arch/x86/miscregfile.cc @@ -186,6 +186,25 @@ void MiscRegFile::setReg(int miscReg, break; case MISCREG_CR8: break; + case MISCREG_CS_ATTR: + { + SegAttr toggled = regVal[miscReg] ^ val; + SegAttr newCSAttr = val; + if (toggled.longMode) { + SegAttr newCSAttr = val; + if (newCSAttr.longMode) { + regVal[MISCREG_ES_EFF_BASE] = 0; + regVal[MISCREG_CS_EFF_BASE] = 0; + regVal[MISCREG_SS_EFF_BASE] = 0; + regVal[MISCREG_DS_EFF_BASE] = 0; + } else { + regVal[MISCREG_ES_EFF_BASE] = regVal[MISCREG_ES_BASE]; + regVal[MISCREG_CS_EFF_BASE] = regVal[MISCREG_CS_BASE]; + regVal[MISCREG_SS_EFF_BASE] = regVal[MISCREG_SS_BASE]; + regVal[MISCREG_DS_EFF_BASE] = regVal[MISCREG_DS_BASE]; + } + } + } } setRegNoEffect(miscReg, newVal); } |