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X86: Add code to interpret debug register values.

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This commit is contained in:
Gabe Black 2009-02-25 10:20:25 -08:00
parent 1e70401c08
commit 3ca2451d81
1 changed files with 73 additions and 1 deletions
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74
src/arch/x86/miscregfile.cc
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@ -104,8 +104,11 @@ string X86ISA::getMiscRegName(RegIndex index)
void MiscRegFile::clear()
{
// Blank everything. 0 might not be an appropriate value for some things.
// Blank everything. 0 might not be an appropriate value for some things,
// but it is for most.
memset(regVal, 0, NumMiscRegs * sizeof(MiscReg));
regVal[MISCREG_DR6] = (mask(8) << 4) | (mask(16) << 16);
regVal[MISCREG_DR7] = 1 << 10;
}
MiscReg MiscRegFile::readRegNoEffect(MiscRegIndex miscReg)
@ -267,6 +270,75 @@ void MiscRegFile::setReg(MiscRegIndex miscReg,
case MISCREG_TSC:
regVal[MISCREG_TSC] = val - tc->getCpuPtr()->curCycle();
return;
case MISCREG_DR0:
case MISCREG_DR1:
case MISCREG_DR2:
case MISCREG_DR3:
/* These should eventually set up breakpoints. */
break;
case MISCREG_DR4:
miscReg = MISCREG_DR6;
/* Fall through to have the same effects as DR6. */
case MISCREG_DR6:
{
DR6 dr6 = regVal[MISCREG_DR6];
DR6 newDR6 = val;
dr6.b0 = newDR6.b0;
dr6.b1 = newDR6.b1;
dr6.b2 = newDR6.b2;
dr6.b3 = newDR6.b3;
dr6.bd = newDR6.bd;
dr6.bs = newDR6.bs;
dr6.bt = newDR6.bt;
newVal = dr6;
}
break;
case MISCREG_DR5:
miscReg = MISCREG_DR7;
/* Fall through to have the same effects as DR7. */
case MISCREG_DR7:
{
DR7 dr7 = regVal[MISCREG_DR7];
DR7 newDR7 = val;
dr7.l0 = newDR7.l0;
dr7.g0 = newDR7.g0;
if (dr7.l0 || dr7.g0) {
panic("Debug register breakpoints not implemented.\n");
} else {
/* Disable breakpoint 0. */
}
dr7.l1 = newDR7.l1;
dr7.g1 = newDR7.g1;
if (dr7.l1 || dr7.g1) {
panic("Debug register breakpoints not implemented.\n");
} else {
/* Disable breakpoint 1. */
}
dr7.l2 = newDR7.l2;
dr7.g2 = newDR7.g2;
if (dr7.l2 || dr7.g2) {
panic("Debug register breakpoints not implemented.\n");
} else {
/* Disable breakpoint 2. */
}
dr7.l3 = newDR7.l3;
dr7.g3 = newDR7.g3;
if (dr7.l3 || dr7.g3) {
panic("Debug register breakpoints not implemented.\n");
} else {
/* Disable breakpoint 3. */
}
dr7.gd = newDR7.gd;
dr7.rw0 = newDR7.rw0;
dr7.len0 = newDR7.len0;
dr7.rw1 = newDR7.rw1;
dr7.len1 = newDR7.len1;
dr7.rw2 = newDR7.rw2;
dr7.len2 = newDR7.len2;
dr7.rw3 = newDR7.rw3;
dr7.len3 = newDR7.len3;
}
break;
default:
break;
}