diff -r 77127b594cb8 -r 707cf79ae86d src/arch/arm/isa.cc
--- a/src/arch/arm/isa.cc	Wed Mar 30 16:51:03 2011 -0500
+++ b/src/arch/arm/isa.cc	Wed Mar 30 16:52:24 2011 -0500
@@ -177,6 +177,7 @@
 MiscReg
 ISA::readMiscReg(int misc_reg, ThreadContext *tc)
 {
+
     if (misc_reg == MISCREG_CPSR) {
         CPSR cpsr = miscRegs[misc_reg];
         PCState pc = tc->pcState();
@@ -447,6 +448,7 @@
                   default:
                       panic("Security Extensions not implemented!");
               }
+              warn("Translating via MISCREG in atomic mode! Fix Me!\n");
               req->setVirt(0, val, 1, flags, tc->pcState().pc());
               fault = tc->getDTBPtr()->translateAtomic(req, tc, mode);
               if (fault == NoFault) {
@@ -475,7 +477,13 @@
             tc->getITBPtr()->invalidateMiscReg();
             tc->getDTBPtr()->invalidateMiscReg();
             break;
-
+          case MISCREG_CPSR_MODE:
+            // This miscreg is used by copy*Regs to set the CPSR mode
+            // without updating other CPSR variables. It's used to
+            // make sure the register map is in such a state that we can
+            // see all of the registers for the copy.
+            updateRegMap(val);
+            return;
         }
     }
     setMiscRegNoEffect(misc_reg, newVal);
diff -r 77127b594cb8 -r 707cf79ae86d src/arch/arm/miscregs.hh
--- a/src/arch/arm/miscregs.hh	Wed Mar 30 16:51:03 2011 -0500
+++ b/src/arch/arm/miscregs.hh	Wed Mar 30 16:52:24 2011 -0500
@@ -170,6 +170,7 @@
         MISCREG_ID_ISAR3,
         MISCREG_ID_ISAR4,
         MISCREG_ID_ISAR5,
+        MISCREG_CPSR_MODE,
         MISCREG_CP15_UNIMP_START,
         MISCREG_TCMTR = MISCREG_CP15_UNIMP_START,
         MISCREG_ID_PFR1,
@@ -233,6 +234,7 @@
         "pmceid1", "pmc_other", "pmxevcntr",
         "pmuserenr", "pmintenset", "pmintenclr",
         "id_isar0", "id_isar1", "id_isar2", "id_isar3", "id_isar4", "id_isar5",
+        "cpsr_mode",
          // Unimplemented below
         "tcmtr",
         "id_pfr1", "id_dfr0", "id_afr0",
diff -r 77127b594cb8 -r 707cf79ae86d src/arch/arm/utility.cc
--- a/src/arch/arm/utility.cc	Wed Mar 30 16:51:03 2011 -0500
+++ b/src/arch/arm/utility.cc	Wed Mar 30 16:52:24 2011 -0500
@@ -124,8 +124,21 @@
 copyRegs(ThreadContext *src, ThreadContext *dest)
 {
     int i;
+
+    int saved_mode = ((CPSR)src->readMiscReg(MISCREG_CPSR)).mode;
+
+    // Make sure we're in user mode, so we can easily see all the registers
+    // in the copy loop
+    src->setMiscReg(MISCREG_CPSR_MODE, MODE_USER);
+    dest->setMiscReg(MISCREG_CPSR_MODE, MODE_USER);
+
     for(i = 0; i < TheISA::NumIntRegs; i++)
         dest->setIntReg(i, src->readIntReg(i));
+
+    // Restore us back to the old mode
+    src->setMiscReg(MISCREG_CPSR_MODE, saved_mode);
+    dest->setMiscReg(MISCREG_CPSR_MODE, saved_mode);
+
     for(i = 0; i < TheISA::NumFloatRegs; i++)
         dest->setFloatReg(i, src->readFloatReg(i));
     for(i = 0; i < TheISA::NumMiscRegs; i++)
diff -r 77127b594cb8 -r 707cf79ae86d src/cpu/o3/thread_context_impl.hh
--- a/src/cpu/o3/thread_context_impl.hh	Wed Mar 30 16:51:03 2011 -0500
+++ b/src/cpu/o3/thread_context_impl.hh	Wed Mar 30 16:52:24 2011 -0500
@@ -231,36 +231,11 @@
 void
 O3ThreadContext<Impl>::copyArchRegs(ThreadContext *tc)
 {
-    // This function will mess things up unless the ROB is empty and
-    // there are no instructions in the pipeline.
-    ThreadID tid = thread->threadId();
-    PhysRegIndex renamed_reg;
+    // Prevent squashing
+    thread->inSyscall = true;
+    TheISA::copyRegs(tc, this);
+    thread->inSyscall = false;
 
-    // First loop through the integer registers.
-    for (int i = 0; i < TheISA::NumIntRegs; ++i) {
-        renamed_reg = cpu->renameMap[tid].lookup(i);
-
-        DPRINTF(O3CPU, "Copying over register %i, had data %lli, "
-                "now has data %lli.\n",
-                renamed_reg, cpu->readIntReg(renamed_reg),
-                tc->readIntReg(i));
-
-        cpu->setIntReg(renamed_reg, tc->readIntReg(i));
-    }
-
-    // Then loop through the floating point registers.
-    for (int i = 0; i < TheISA::NumFloatRegs; ++i) {
-        renamed_reg = cpu->renameMap[tid].lookup(i + TheISA::FP_Base_DepTag);
-        cpu->setFloatRegBits(renamed_reg,
-                             tc->readFloatRegBits(i));
-    }
-
-    // Copy the misc regs.
-    TheISA::copyMiscRegs(tc, this);
-
-    // Then finally set the PC, the next PC, the nextNPC, the micropc, and the
-    // next micropc.
-    cpu->pcState(tc->pcState(), tid);
 #if !FULL_SYSTEM
     this->thread->funcExeInst = tc->readFuncExeInst();
 #endif