diff options
Diffstat (limited to 'src/arch/x86/miscregfile.cc')
| -rw-r--r-- | src/arch/x86/miscregfile.cc | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/arch/x86/miscregfile.cc b/src/arch/x86/miscregfile.cc index a01902478..05d64f73f 100644 --- a/src/arch/x86/miscregfile.cc +++ b/src/arch/x86/miscregfile.cc @@ -205,6 +205,31 @@ void MiscRegFile::setReg(int miscReg, } } } + // These segments always actually use their bases, or in other words + // their effective bases must stay equal to their actual bases. + case MISCREG_FS: + case MISCREG_GS: + case MISCREG_HS: + case MISCREG_TSL: + case MISCREG_TSG: + case MISCREG_TR: + case MISCREG_IDTR: + regVal[MISCREG_SEG_EFF_BASE(miscReg - MISCREG_SEG_SEL_BASE)] = val; + break; + // These segments ignore their bases in 64 bit mode. + // their effective bases must stay equal to their actual bases. + case MISCREG_ES: + case MISCREG_CS: + case MISCREG_SS: + case MISCREG_DS: + { + Efer efer = regVal[MISCREG_EFER]; + SegAttr csAttr = regVal[MISCREG_CS_ATTR]; + if (!efer.lma || !csAttr.longMode) // Check for non 64 bit mode. + regVal[MISCREG_SEG_EFF_BASE(miscReg - + MISCREG_SEG_SEL_BASE)] = val; + } + break; } setRegNoEffect(miscReg, newVal); } |