Merge with head.

--HG--
extra : convert_revision : 22aafb1cead3f584e64c188dc8eb45e271f4e7e9

configs/common/Simulation.py

@@ -130,7 +130,7 @@ def run(options, root, testsys, cpu_class):
             m5.panic("checkpoint dir %s does not exist!" % cptdir)
 
         dirs = listdir(cptdir)
-        expr = re.compile('cpt.([0-9]*)')
+        expr = re.compile('cpt\.([0-9]*)')
         cpts = []
         for dir in dirs:
             match = expr.match(dir)
@@ -166,7 +166,9 @@ def run(options, root, testsys, cpu_class):
 
         if options.standard_switch:
             exit_event = m5.simulate(options.warmup)
+            m5.drain(testsys)
             m5.switchCpus(switch_cpu_list1)
+            m5.resume(testsys)
 
     num_checkpoints = 0
     exit_cause = ''

src/arch/alpha/linux/process.cc

@@ -549,7 +549,7 @@ SyscallDesc AlphaLinuxProcess::syscallDescs[] = {
     /* 422 */ SyscallDesc("clock_nanosleep", unimplementedFunc),
     /* 423 */ SyscallDesc("semtimedop", unimplementedFunc),
     /* 424 */ SyscallDesc("tgkill", unimplementedFunc),
-    /* 425 */ SyscallDesc("stat64", unimplementedFunc),
+    /* 425 */ SyscallDesc("stat64", stat64Func<AlphaLinux>),
     /* 426 */ SyscallDesc("lstat64", lstat64Func<AlphaLinux>),
     /* 427 */ SyscallDesc("fstat64", fstat64Func<AlphaLinux>),
     /* 428 */ SyscallDesc("vserver", unimplementedFunc),

src/base/loader/elf_object.cc

@@ -343,8 +343,8 @@ ElfObject::loadLocalSymbols(SymbolTable *symtab, Addr addrMask)
     return loadSomeSymbols(symtab, STB_LOCAL);
 }
 
-bool
-ElfObject::isDynamic()
+void
+ElfObject::getSections()
 {
     Elf *elf;
     int sec_idx = 1; // there is a 0 but it is nothing, go figure
@@ -353,6 +353,8 @@ ElfObject::isDynamic()
 
     GElf_Ehdr ehdr;
 
+    assert(!sectionNames.size());
+
     // check that header matches library version
     if (elf_version(EV_CURRENT) == EV_NONE)
         panic("wrong elf version number!");
@@ -372,11 +374,17 @@ ElfObject::isDynamic()
     // While there are no more sections
     while (section != NULL) {
         gelf_getshdr(section, &shdr);
-        if (!strcmp(".interp", elf_strptr(elf, ehdr.e_shstrndx, shdr.sh_name)))
-            return true;
+        sectionNames.insert(elf_strptr(elf, ehdr.e_shstrndx, shdr.sh_name));
         section = elf_getscn(elf, ++sec_idx);
     } // while sections
-    return false;
+}
+
+bool
+ElfObject::sectionExists(string sec)
+{
+    if (!sectionNames.size())
+        getSections();
+    return sectionNames.find(sec) != sectionNames.end();
 }
 
 

src/base/loader/elf_object.hh

@@ -32,6 +32,7 @@
 #define __ELF_OBJECT_HH__
 
 #include "base/loader/object_file.hh"
+#include <set>
 
 class ElfObject : public ObjectFile
 {
@@ -42,6 +43,7 @@ class ElfObject : public ObjectFile
     Addr _programHeaderTable;
     uint16_t _programHeaderSize;
     uint16_t _programHeaderCount;
+    std::set<std::string> sectionNames;
 
     /// Helper functions for loadGlobalSymbols() and loadLocalSymbols().
     bool loadSomeSymbols(SymbolTable *symtab, int binding);
@@ -50,6 +52,9 @@ class ElfObject : public ObjectFile
               size_t _len, uint8_t *_data,
               Arch _arch, OpSys _opSys);
 
+    void getSections();
+    bool sectionExists(std::string sec);
+
   public:
     virtual ~ElfObject() {}
 
@@ -58,7 +63,8 @@ class ElfObject : public ObjectFile
     virtual bool loadLocalSymbols(SymbolTable *symtab, Addr addrMask =
             std::numeric_limits<Addr>::max());
 
-    virtual bool isDynamic();
+    virtual bool isDynamic() { return sectionExists(".interp"); }
+    virtual bool hasTLS() { return sectionExists(".tbss"); }
 
     static ObjectFile *tryFile(const std::string &fname, int fd,
                                size_t len, uint8_t *data);

src/base/loader/object_file.cc

@@ -150,9 +150,3 @@ createObjectFile(const string &fname, bool raw)
     munmap((char*)fileData, len);
     return NULL;
 }
-
-bool
-ObjectFile::isDynamic()
-{
-    return false;
-}

src/base/loader/object_file.hh

@@ -85,7 +85,8 @@ class ObjectFile
     virtual bool loadLocalSymbols(SymbolTable *symtab, Addr addrMask =
             std::numeric_limits<Addr>::max()) = 0;
 
-    virtual bool  isDynamic();
+    virtual bool isDynamic() { return false; }
+    virtual bool hasTLS() { return false; }
 
     Arch  getArch()  const { return arch; }
     OpSys getOpSys() const { return opSys; }

src/dev/i8254xGBe.cc

@@ -699,8 +699,9 @@ IGbE::RxDescCache::writePacket(EthPacketPtr packet)
             packet->length, igbe->regs.rctl.descSize());
     assert(packet->length < igbe->regs.rctl.descSize());
 
-    if (!unusedCache.size())
-        return false;
+    assert(unusedCache.size());
+    //if (!unusedCache.size())
+    //    return false;
 
     pktPtr = packet;
     pktDone = false;
@@ -823,8 +824,10 @@ IGbE::RxDescCache::pktComplete()
 void
 IGbE::RxDescCache::enableSm()
 {
-    igbe->rxTick = true;
-    igbe->restartClock();
+    if (!igbe->drainEvent) {
+        igbe->rxTick = true;
+        igbe->restartClock();
+    }
 }
 
 bool
@@ -952,6 +955,7 @@ IGbE::TxDescCache::pktComplete()
 
         DPRINTF(EthernetDesc, "Partial Packet Descriptor Done\n");
         enableSm();
+        igbe->checkDrain();
         return;
     }
 
@@ -1079,8 +1083,10 @@ IGbE::TxDescCache::packetAvailable()
 void
 IGbE::TxDescCache::enableSm()
 {
-    igbe->txTick = true;
-    igbe->restartClock();
+    if (!igbe->drainEvent) {
+        igbe->txTick = true;
+        igbe->restartClock();
+    }
 }
 
 bool
@@ -1172,7 +1178,7 @@ IGbE::txStateMachine()
 
         DPRINTF(EthernetSM, "TXS: packet placed in TX FIFO\n");
         success = txFifo.push(txPacket);
-        txFifoTick = true;
+        txFifoTick = true && !drainEvent;
         assert(success);
         txPacket = NULL;
         txDescCache.writeback((cacheBlockSize()-1)>>4);
@@ -1194,18 +1200,18 @@ IGbE::txStateMachine()
         if (txDescCache.descLeft() == 0) {
             postInterrupt(IT_TXQE);
             txDescCache.writeback(0);
+            txDescCache.fetchDescriptors();
             DPRINTF(EthernetSM, "TXS: No descriptors left in ring, forcing "
                     "writeback stopping ticking and posting TXQE\n");
-            txDescCache.fetchDescriptors();
             txTick = false;
             return;
         }
 
 
         if (!(txDescCache.descUnused())) {
+            txDescCache.fetchDescriptors();
             DPRINTF(EthernetSM, "TXS: No descriptors available in cache, fetching and stopping ticking\n");
             txTick = false;
-            txDescCache.fetchDescriptors();
             return;
         }
 
@@ -1221,7 +1227,6 @@ IGbE::txStateMachine()
             DPRINTF(EthernetSM, "TXS: No packets to get, writing back used descriptors\n");
             txDescCache.writeback(0);
         } else {
-            txDescCache.writeback((cacheBlockSize()-1)>>4);
             DPRINTF(EthernetSM, "TXS: FIFO full, stopping ticking until space "
                     "available in FIFO\n");
             txTick = false;
@@ -1245,7 +1250,7 @@ IGbE::ethRxPkt(EthPacketPtr pkt)
     }
 
     // restart the state machines if they are stopped
-    rxTick = true;
+    rxTick = true && !drainEvent;
     if ((rxTick || txTick) && !tickEvent.scheduled()) {
         DPRINTF(EthernetSM, "RXS: received packet into fifo, starting ticking\n");
         restartClock();
@@ -1306,10 +1311,10 @@ IGbE::rxStateMachine()
         }
 
         if (rxDescCache.descUnused() == 0) {
+            rxDescCache.fetchDescriptors();
             DPRINTF(EthernetSM, "RXS: No descriptors available in cache, "
                     "fetching descriptors and stopping ticking\n");
             rxTick = false;
-            rxDescCache.fetchDescriptors();
         }
         return;
     }
@@ -1321,10 +1326,10 @@ IGbE::rxStateMachine()
     }
 
     if (!rxDescCache.descUnused()) {
+        rxDescCache.fetchDescriptors();
         DPRINTF(EthernetSM, "RXS: No descriptors available in cache, stopping ticking\n");
         rxTick = false;
         DPRINTF(EthernetSM, "RXS: No descriptors available, fetching\n");
-        rxDescCache.fetchDescriptors();
         return;
     }
 
@@ -1338,15 +1343,15 @@ IGbE::rxStateMachine()
     pkt = rxFifo.front();
 
     DPRINTF(EthernetSM, "RXS: Writing packet into memory\n");
-    if (!rxDescCache.writePacket(pkt)) {
+    if (rxDescCache.writePacket(pkt)) {
+        DPRINTF(EthernetSM, "RXS: Removing packet from FIFO\n");
+        rxFifo.pop();
+        DPRINTF(EthernetSM, "RXS: stopping ticking until packet DMA completes\n");
+        rxTick = false;
+        rxDmaPacket = true;
         return;
     }
 
-    DPRINTF(EthernetSM, "RXS: Removing packet from FIFO\n");
-    rxFifo.pop();
-    DPRINTF(EthernetSM, "RXS: stopping ticking until packet DMA completes\n");
-    rxTick = false;
-    rxDmaPacket = true;
 }
 
 void
@@ -1404,8 +1409,8 @@ IGbE::ethTxDone()
     // restart the tx state machines if they are stopped
     // fifo to send another packet
     // tx sm to put more data into the fifo
-    txFifoTick = true;
-    if (txDescCache.descLeft() != 0)
+    txFifoTick = true && !drainEvent;
+    if (txDescCache.descLeft() != 0 && !drainEvent)
         txTick = true;
 
     restartClock();

src/dev/i8254xGBe.hh

@@ -388,14 +388,13 @@ class IGbE : public EtherDevice
                     oldHead, curHead);
 
             // If we still have more to wb, call wb now
-            bool oldMoreToWb = moreToWb;
+            intAfterWb();
             if (moreToWb) {
                 DPRINTF(EthernetDesc, "Writeback has more todo\n");
                 writeback(wbAlignment);
             }
 
-            intAfterWb();
-            if (!oldMoreToWb) {
+            if (!wbOut) {
                 igbe->checkDrain();
             }
             fetchAfterWb();

src/sim/process.cc

@@ -453,9 +453,15 @@ LiveProcess::create(const std::string &nm, System *system, int stdin_fd,
 
     if (objFile->isDynamic())
        fatal("Object file is a dynamic executable however only static "
-             "executables are supported!\n        Please recompile your "
+             "executables are supported!\n       Please recompile your "
              "executable as a static binary and try again.\n");
 
+    if (objFile->hasTLS())
+        fatal("Object file has a TLS section and loading of TLS sections "
+              "are not currently supported!\n       Please recompile your "
+              "executable with a non-TLS toolchain or add TLS support to "
+              "M5 and try again\n");
+
 #if THE_ISA == ALPHA_ISA
     if (objFile->getArch() != ObjectFile::Alpha)
         fatal("Object file architecture does not match compiled ISA (Alpha).");

src/sim/syscall_emul.hh

@@ -604,6 +604,32 @@ statFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
 }
 
 
+/// Target stat64() handler.
+template <class OS>
+SyscallReturn
+stat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
+           ThreadContext *tc)
+{
+    std::string path;
+
+    if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
+        return -EFAULT;
+
+    // Adjust path for current working directory
+    path = process->fullPath(path);
+
+    struct stat64 hostBuf;
+    int result = stat64(path.c_str(), &hostBuf);
+
+    if (result < 0)
+        return -errno;
+
+    copyOutStat64Buf<OS>(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
+
+    return 0;
+}
+
+
 /// Target fstat64() handler.
 template <class OS>
 SyscallReturn