derek/gem5
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

SPARC: Truncate syscall args and return values appropriately.

Browse Source
This commit is contained in:
Gabe Black
2008-12-16 23:06:37 -08:00
parent ab5eeb4b62
commit 02cd18f536
2 changed files with 21 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
src/arch/sparc/syscallreturn.hh
View File

@@ -50,13 +50,23 @@ namespace SparcISA
tc->setIntReg(NumIntArchRegs + 2,
tc->readIntReg(NumIntArchRegs + 2) & 0xEE);
//tc->setMiscRegNoEffect(MISCREG_CCR, tc->readMiscRegNoEffect(MISCREG_CCR) & 0xEE);
tc->setIntReg(ReturnValueReg, return_value.value());
IntReg val = return_value.value();
if (bits(tc->readMiscRegNoEffect(
SparcISA::MISCREG_PSTATE), 3, 3)) {
val = bits(val, 31, 0);
}
tc->setIntReg(ReturnValueReg, val);
} else {
// got an error, set XCC.C
tc->setIntReg(NumIntArchRegs + 2,
tc->readIntReg(NumIntArchRegs + 2) | 0x11);
//tc->setMiscRegNoEffect(MISCREG_CCR, tc->readMiscRegNoEffect(MISCREG_CCR) | 0x11);
tc->setIntReg(ReturnValueReg, -return_value.value());
IntReg val = -return_value.value();
if (bits(tc->readMiscRegNoEffect(
SparcISA::MISCREG_PSTATE), 3, 3)) {
val = bits(val, 31, 0);
}
tc->setIntReg(ReturnValueReg, val);
}
}
};