diff --git a/src/arch/sparc/linux/syscalls.cc b/src/arch/sparc/linux/syscalls.cc
index 24d568162..03c8bafe2 100644
--- a/src/arch/sparc/linux/syscalls.cc
+++ b/src/arch/sparc/linux/syscalls.cc
@@ -132,7 +132,7 @@ SyscallDesc SparcLinuxProcess::syscall32Descs[] = {
     /*  40 */ SyscallDesc("lstat", unimplementedFunc),
     /*  41 */ SyscallDesc("dup", unimplementedFunc),
     /*  42 */ SyscallDesc("pipe", pipePseudoFunc),
-    /*  43 */ SyscallDesc("times", unimplementedFunc),
+    /*  43 */ SyscallDesc("times", ignoreFunc),
     /*  44 */ SyscallDesc("getuid32", unimplementedFunc),
     /*  45 */ SyscallDesc("umount2", unimplementedFunc), //32 bit
     /*  46 */ SyscallDesc("setgid", unimplementedFunc), //32 bit
@@ -320,7 +320,7 @@ SyscallDesc SparcLinuxProcess::syscall32Descs[] = {
     /* 228 */ SyscallDesc("setfsuid", unimplementedFunc), //32 bit
     /* 229 */ SyscallDesc("setfsgid", unimplementedFunc), //32 bit
     /* 230 */ SyscallDesc("_newselect", unimplementedFunc), //32 bit
-    /* 231 */ SyscallDesc("time", unimplementedFunc),
+    /* 231 */ SyscallDesc("time", ignoreFunc),
     /* 232 */ SyscallDesc("oldstat", unimplementedFunc),
     /* 233 */ SyscallDesc("stime", unimplementedFunc),
     /* 234 */ SyscallDesc("statfs64", unimplementedFunc),
@@ -435,7 +435,7 @@ SyscallDesc SparcLinuxProcess::syscallDescs[] = {
     /* 40 */ SyscallDesc("lstat", unimplementedFunc),
     /* 41 */ SyscallDesc("dup", unimplementedFunc),
     /* 42 */ SyscallDesc("pipe", pipePseudoFunc),
-    /* 43 */ SyscallDesc("times", unimplementedFunc),
+    /* 43 */ SyscallDesc("times", ignoreFunc),
     /* 44 */ SyscallDesc("getuid32", unimplementedFunc),
     /* 45 */ SyscallDesc("umount2", unimplementedFunc),
     /* 46 */ SyscallDesc("setgid", unimplementedFunc),
@@ -623,7 +623,7 @@ SyscallDesc SparcLinuxProcess::syscallDescs[] = {
     /* 228 */ SyscallDesc("setfsuid", unimplementedFunc),
     /* 229 */ SyscallDesc("setfsgid", unimplementedFunc),
     /* 230 */ SyscallDesc("_newselect", unimplementedFunc),
-    /* 231 */ SyscallDesc("time", unimplementedFunc),
+    /* 231 */ SyscallDesc("time", ignoreFunc),
     /* 232 */ SyscallDesc("oldstat", unimplementedFunc),
     /* 233 */ SyscallDesc("stime", unimplementedFunc),
     /* 234 */ SyscallDesc("statfs64", unimplementedFunc),
diff --git a/src/cpu/exetrace.cc b/src/cpu/exetrace.cc
index 20694b38f..c568b1439 100644
--- a/src/cpu/exetrace.cc
+++ b/src/cpu/exetrace.cc
@@ -31,6 +31,7 @@
  *          Steve Raasch
  */
 
+#include <errno.h>
 #include <fstream>
 #include <iomanip>
 #include <sys/ipc.h>
@@ -40,6 +41,7 @@
 #include "arch/regfile.hh"
 #include "arch/utility.hh"
 #include "base/loader/symtab.hh"
+#include "base/socket.hh"
 #include "config/full_system.hh"
 #include "cpu/base.hh"
 #include "cpu/exetrace.hh"
@@ -65,6 +67,7 @@ static bool wasMicro = false;
 
 namespace Trace {
 SharedData *shared_data = NULL;
+ListenSocket *cosim_listener = NULL;
 
 void
 setupSharedData()
@@ -150,9 +153,96 @@ Trace::InstRecord::dump()
     ostream &outs = Trace::output();
 
     DPRINTF(Sparc, "Instruction: %#X\n", staticInst->machInst);
+    bool diff = true;
     if (IsOn(ExecRegDelta))
     {
+        diff = false;
+#ifndef NDEBUG
 #if THE_ISA == SPARC_ISA
+        static int fd = 0;
+        //Don't print what happens for each micro-op, just print out
+        //once at the last op, and for regular instructions.
+        if(!staticInst->isMicroOp() || staticInst->isLastMicroOp())
+        {
+            if(!cosim_listener)
+            {
+                int port = 8000;
+                cosim_listener = new ListenSocket();
+                while(!cosim_listener->listen(port, true))
+                {
+                    DPRINTF(GDBMisc, "Can't bind port %d\n", port);
+                    port++;
+                }
+                ccprintf(cerr, "Listening for cosimulator on port %d\n", port);
+                fd = cosim_listener->accept();
+            }
+            char prefix[] = "goli";
+            for(int p = 0; p < 4; p++)
+            {
+                for(int i = 0; i < 8; i++)
+                {
+                    uint64_t regVal;
+                    int res = read(fd, &regVal, sizeof(regVal));
+                    if(res < 0)
+                        panic("First read call failed! %s\n", strerror(errno));
+                    regVal = TheISA::gtoh(regVal);
+                    uint64_t realRegVal = thread->readIntReg(p * 8 + i);
+                    if((regVal & 0xffffffffULL) != (realRegVal & 0xffffffffULL))
+                    {
+                        DPRINTF(ExecRegDelta, "Register %s%d should be %#x but is %#x.\n", prefix[p], i, regVal, realRegVal);
+                        diff = true;
+                    }
+                    //ccprintf(outs, "%s%d m5 = %#x statetrace = %#x\n", prefix[p], i, realRegVal, regVal);
+                }
+            }
+            /*for(int f = 0; f <= 62; f+=2)
+            {
+                uint64_t regVal;
+                int res = read(fd, &regVal, sizeof(regVal));
+                if(res < 0)
+                    panic("First read call failed! %s\n", strerror(errno));
+                regVal = TheISA::gtoh(regVal);
+                uint64_t realRegVal = thread->readFloatRegBits(f, 64);
+                if(regVal != realRegVal)
+                {
+                    DPRINTF(ExecRegDelta, "Register f%d should be %#x but is %#x.\n", f, regVal, realRegVal);
+                }
+            }*/
+            uint64_t regVal;
+            int res = read(fd, &regVal, sizeof(regVal));
+            if(res < 0)
+                panic("First read call failed! %s\n", strerror(errno));
+            regVal = TheISA::gtoh(regVal);
+            uint64_t realRegVal = thread->readNextPC();
+            if(regVal != realRegVal)
+            {
+                DPRINTF(ExecRegDelta, "Register pc should be %#x but is %#x.\n", regVal, realRegVal);
+                diff = true;
+            }
+            res = read(fd, &regVal, sizeof(regVal));
+            if(res < 0)
+                panic("First read call failed! %s\n", strerror(errno));
+            regVal = TheISA::gtoh(regVal);
+            realRegVal = thread->readNextNPC();
+            if(regVal != realRegVal)
+            {
+                DPRINTF(ExecRegDelta, "Register npc should be %#x but is %#x.\n", regVal, realRegVal);
+                diff = true;
+            }
+            res = read(fd, &regVal, sizeof(regVal));
+            if(res < 0)
+                panic("First read call failed! %s\n", strerror(errno));
+            regVal = TheISA::gtoh(regVal);
+            realRegVal = thread->readIntReg(SparcISA::NumIntArchRegs + 2);
+            if((regVal & 0xF) != (realRegVal & 0xF))
+            {
+                DPRINTF(ExecRegDelta, "Register ccr should be %#x but is %#x.\n", regVal, realRegVal);
+                diff = true;
+            }
+        }
+#endif
+#endif
+#if 0 //THE_ISA == SPARC_ISA
         //Don't print what happens for each micro-op, just print out
         //once at the last op, and for regular instructions.
         if(!staticInst->isMicroOp() || staticInst->isLastMicroOp())
@@ -211,7 +301,8 @@ Trace::InstRecord::dump()
         }
 #endif
     }
-    else if (IsOn(ExecIntel)) {
+    if(!diff) {
+    } else if (IsOn(ExecIntel)) {
         ccprintf(outs, "%7d ) ", when);
         outs << "0x" << hex << PC << ":\t";
         if (staticInst->isLoad()) {