Processes: Make getting and setting system call arguments part of a process object.

47 files changed, 401 insertions, 726 deletions

diff --git a/src/arch/SConscript b/src/arch/SConscript
index 2b0af2816..b85ffbd89 100644
--- a/src/arch/SConscript
+++ b/src/arch/SConscript
@@ -56,7 +56,6 @@ isa_switch_hdrs = Split('''
         regfile.hh
         remote_gdb.hh
         stacktrace.hh
-        syscallreturn.hh
         tlb.hh
         types.hh
         utility.hh
diff --git a/src/arch/alpha/freebsd/system.cc b/src/arch/alpha/freebsd/system.cc
index f2ea1b587..e541b260c 100644
--- a/src/arch/alpha/freebsd/system.cc
+++ b/src/arch/alpha/freebsd/system.cc
@@ -74,9 +74,8 @@ FreebsdAlphaSystem::doCalibrateClocks(ThreadContext *tc)
     Addr ppc_vaddr = 0;
     Addr timer_vaddr = 0;
 
-    assert(NumArgumentRegs >= 3);
-    ppc_vaddr = (Addr)tc->readIntReg(ArgumentReg[1]);
-    timer_vaddr = (Addr)tc->readIntReg(ArgumentReg[2]);
+    ppc_vaddr = (Addr)tc->readIntReg(17);
+    timer_vaddr = (Addr)tc->readIntReg(18);
 
     virtPort.write(ppc_vaddr, (uint32_t)Clock::Frequency);
     virtPort.write(timer_vaddr, (uint32_t)TIMER_FREQUENCY);
diff --git a/src/arch/alpha/isa_traits.hh b/src/arch/alpha/isa_traits.hh
index e5e4542a7..d37a769ea 100644
--- a/src/arch/alpha/isa_traits.hh
+++ b/src/arch/alpha/isa_traits.hh
@@ -152,12 +152,9 @@ const int ReturnAddressReg = 26;
 const int ReturnValueReg = 0;
 const int FramePointerReg = 15;
 
-const int ArgumentReg[] = {16, 17, 18, 19, 20, 21};
-const int NumArgumentRegs = sizeof(ArgumentReg) / sizeof(const int);
-
-const int SyscallNumReg = ReturnValueReg;
-const int SyscallPseudoReturnReg = ArgumentReg[4];
-const int SyscallSuccessReg = 19;
+const int SyscallNumReg = 0;
+const int FirstArgumentReg = 16;
+const int SyscallPseudoReturnReg = 20;
 
 const int LogVMPageSize = 13;       // 8K bytes
 const int VMPageSize = (1 << LogVMPageSize);
diff --git a/src/arch/alpha/linux/process.cc b/src/arch/alpha/linux/process.cc
index 605e40627..1e4f75790 100644
--- a/src/arch/alpha/linux/process.cc
+++ b/src/arch/alpha/linux/process.cc
@@ -48,7 +48,7 @@ static SyscallReturn
 unameFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
           ThreadContext *tc)
 {
-    TypedBufferArg<Linux::utsname> name(tc->getSyscallArg(0));
+    TypedBufferArg<Linux::utsname> name(process->getSyscallArg(tc, 0));
 
     strcpy(name->sysname, "Linux");
     strcpy(name->nodename, "m5.eecs.umich.edu");
@@ -67,13 +67,13 @@ static SyscallReturn
 osf_getsysinfoFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
                    ThreadContext *tc)
 {
-    unsigned op = tc->getSyscallArg(0);
-    // unsigned nbytes = tc->getSyscallArg(2);
+    unsigned op = process->getSyscallArg(tc, 0);
+    // unsigned nbytes = process->getSyscallArg(tc, 2);
 
     switch (op) {
 
       case 45: { // GSI_IEEE_FP_CONTROL
-          TypedBufferArg<uint64_t> fpcr(tc->getSyscallArg(1));
+          TypedBufferArg<uint64_t> fpcr(process->getSyscallArg(tc, 1));
           // I don't think this exactly matches the HW FPCR
           *fpcr = 0;
           fpcr.copyOut(tc->getMemPort());
@@ -94,13 +94,13 @@ static SyscallReturn
 osf_setsysinfoFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
                    ThreadContext *tc)
 {
-    unsigned op = tc->getSyscallArg(0);
-    // unsigned nbytes = tc->getSyscallArg(2);
+    unsigned op = process->getSyscallArg(tc, 0);
+    // unsigned nbytes = process->getSyscallArg(tc, 2);
 
     switch (op) {
 
       case 14: { // SSI_IEEE_FP_CONTROL
-          TypedBufferArg<uint64_t> fpcr(tc->getSyscallArg(1));
+          TypedBufferArg<uint64_t> fpcr(process->getSyscallArg(tc, 1));
           // I don't think this exactly matches the HW FPCR
           fpcr.copyIn(tc->getMemPort());
           DPRINTFR(SyscallVerbose, "osf_setsysinfo(SSI_IEEE_FP_CONTROL): "
diff --git a/src/arch/alpha/process.cc b/src/arch/alpha/process.cc
index 004be1ec0..9c6e62815 100644
--- a/src/arch/alpha/process.cc
+++ b/src/arch/alpha/process.cc
@@ -42,6 +42,8 @@
 using namespace AlphaISA;
 using namespace std;
 
+static const int SyscallSuccessReg = 19;
+
 AlphaLiveProcess::AlphaLiveProcess(LiveProcessParams *params,
                                    ObjectFile *objFile)
     : LiveProcess(params, objFile)
@@ -156,12 +158,10 @@ AlphaLiveProcess::argsInit(int intSize, int pageSize)
                 (uint8_t*)&(auxv[x].a_val), intSize);
     }
 
-    assert(NumArgumentRegs >= 2);
-
     ThreadContext *tc = system->getThreadContext(contextIds[0]);
 
-    tc->setIntReg(ArgumentReg[0], argc);
-    tc->setIntReg(ArgumentReg[1], argv_array_base);
+    setSyscallArg(tc, 0, argc);
+    setSyscallArg(tc, 1, argv_array_base);
     tc->setIntReg(StackPointerReg, stack_min);
 
     Addr prog_entry = objFile->entryPoint();
@@ -195,3 +195,35 @@ AlphaLiveProcess::startup()
     tc->setMiscRegNoEffect(IPR_DTB_ASN, M5_pid << 57);
 }
 
+AlphaISA::IntReg
+AlphaLiveProcess::getSyscallArg(ThreadContext *tc, int i)
+{
+    assert(i < 6);
+    return tc->readIntReg(FirstArgumentReg + i);
+}
+
+void
+AlphaLiveProcess::setSyscallArg(ThreadContext *tc,
+        int i, AlphaISA::IntReg val)
+{
+    assert(i < 6);
+    tc->setIntReg(FirstArgumentReg + i, val);
+}
+
+void
+AlphaLiveProcess::setSyscallReturn(ThreadContext *tc,
+        SyscallReturn return_value)
+{
+    // check for error condition.  Alpha syscall convention is to
+    // indicate success/failure in reg a3 (r19) and put the
+    // return value itself in the standard return value reg (v0).
+    if (return_value.successful()) {
+        // no error
+        tc->setIntReg(SyscallSuccessReg, 0);
+        tc->setIntReg(ReturnValueReg, return_value.value());
+    } else {
+        // got an error, return details
+        tc->setIntReg(SyscallSuccessReg, (IntReg)-1);
+        tc->setIntReg(ReturnValueReg, -return_value.value());
+    }
+}
diff --git a/src/arch/alpha/process.hh b/src/arch/alpha/process.hh
index 65c4624ae..6d083c5ac 100644
--- a/src/arch/alpha/process.hh
+++ b/src/arch/alpha/process.hh
@@ -42,6 +42,11 @@ class AlphaLiveProcess : public LiveProcess
     void startup();
 
     void argsInit(int intSize, int pageSize);
+
+  public:
+    AlphaISA::IntReg getSyscallArg(ThreadContext *tc, int i);
+    void setSyscallArg(ThreadContext *tc, int i, AlphaISA::IntReg val);
+    void setSyscallReturn(ThreadContext *tc, SyscallReturn return_value);
 };
 
 #endif // __ARCH_ALPHA_PROCESS_HH__
diff --git a/src/arch/alpha/syscallreturn.hh b/src/arch/alpha/syscallreturn.hh
deleted file mode 100644
index 776f34fbf..000000000
--- a/src/arch/alpha/syscallreturn.hh
+++ /dev/null
@@ -1,59 +0,0 @@
-/*
- * Copyright (c) 2003-2005 The Regents of The University of Michigan
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met: redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer;
- * redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution;
- * neither the name of the copyright holders nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * Authors: Steve Reinhardt
- *          Gabe Black
- */
-
-#ifndef __ARCH_ALPHA_SYSCALLRETURN_HH__
-#define __ARCH_ALPHA_SYSCALLRETURN_HH__
-
-#include "cpu/thread_context.hh"
-#include "sim/syscallreturn.hh"
-
-namespace AlphaISA {
-
-static inline void
-setSyscallReturn(SyscallReturn return_value, ThreadContext *tc)
-{
-    // check for error condition.  Alpha syscall convention is to
-    // indicate success/failure in reg a3 (r19) and put the
-    // return value itself in the standard return value reg (v0).
-    if (return_value.successful()) {
-        // no error
-        tc->setIntReg(SyscallSuccessReg, 0);
-        tc->setIntReg(ReturnValueReg, return_value.value());
-    } else {
-        // got an error, return details
-        tc->setIntReg(SyscallSuccessReg, (IntReg)-1);
-        tc->setIntReg(ReturnValueReg, -return_value.value());
-    }
-}
-
-} // namespace AlphaISA
-
-#endif // __ARCH_ALPHA_SYSCALLRETURN_HH__
diff --git a/src/arch/alpha/tru64/process.cc b/src/arch/alpha/tru64/process.cc
index b84dfb286..8fa3cdeda 100644
--- a/src/arch/alpha/tru64/process.cc
+++ b/src/arch/alpha/tru64/process.cc
@@ -45,7 +45,7 @@ static SyscallReturn
 unameFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
           ThreadContext *tc)
 {
-    TypedBufferArg<AlphaTru64::utsname> name(tc->getSyscallArg(0));
+    TypedBufferArg<AlphaTru64::utsname> name(process->getSyscallArg(tc, 0));
 
     strcpy(name->sysname, "OSF1");
     strcpy(name->nodename, "m5.eecs.umich.edu");
@@ -62,34 +62,35 @@ static SyscallReturn
 getsysinfoFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
                ThreadContext *tc)
 {
-    unsigned op = tc->getSyscallArg(0);
-    unsigned nbytes = tc->getSyscallArg(2);
+    unsigned op = process->getSyscallArg(tc, 0);
+    unsigned nbytes = process->getSyscallArg(tc, 2);
 
     switch (op) {
 
       case AlphaTru64::GSI_MAX_CPU: {
-          TypedBufferArg<uint32_t> max_cpu(tc->getSyscallArg(1));
+          TypedBufferArg<uint32_t> max_cpu(process->getSyscallArg(tc, 1));
           *max_cpu = htog((uint32_t)process->numCpus());
           max_cpu.copyOut(tc->getMemPort());
           return 1;
       }
 
       case AlphaTru64::GSI_CPUS_IN_BOX: {
-          TypedBufferArg<uint32_t> cpus_in_box(tc->getSyscallArg(1));
+          TypedBufferArg<uint32_t> cpus_in_box(process->getSyscallArg(tc, 1));
           *cpus_in_box = htog((uint32_t)process->numCpus());
           cpus_in_box.copyOut(tc->getMemPort());
           return 1;
       }
 
       case AlphaTru64::GSI_PHYSMEM: {
-          TypedBufferArg<uint64_t> physmem(tc->getSyscallArg(1));
+          TypedBufferArg<uint64_t> physmem(process->getSyscallArg(tc, 1));
           *physmem = htog((uint64_t)1024 * 1024);  // physical memory in KB
           physmem.copyOut(tc->getMemPort());
           return 1;
       }
 
       case AlphaTru64::GSI_CPU_INFO: {
-          TypedBufferArg<AlphaTru64::cpu_info> infop(tc->getSyscallArg(1));
+          TypedBufferArg<AlphaTru64::cpu_info>
+              infop(process->getSyscallArg(tc, 1));
 
           infop->current_cpu = htog(0);
           infop->cpus_in_box = htog(process->numCpus());
@@ -106,14 +107,14 @@ getsysinfoFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
       }
 
       case AlphaTru64::GSI_PROC_TYPE: {
-          TypedBufferArg<uint64_t> proc_type(tc->getSyscallArg(1));
+          TypedBufferArg<uint64_t> proc_type(process->getSyscallArg(tc, 1));
           *proc_type = htog((uint64_t)11);
           proc_type.copyOut(tc->getMemPort());
           return 1;
       }
 
       case AlphaTru64::GSI_PLATFORM_NAME: {
-          BufferArg bufArg(tc->getSyscallArg(1), nbytes);
+          BufferArg bufArg(process->getSyscallArg(tc, 1), nbytes);
           strncpy((char *)bufArg.bufferPtr(),
                   "COMPAQ Professional Workstation XP1000",
                   nbytes);
@@ -122,7 +123,7 @@ getsysinfoFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
       }
 
       case AlphaTru64::GSI_CLK_TCK: {
-          TypedBufferArg<uint64_t> clk_hz(tc->getSyscallArg(1));
+          TypedBufferArg<uint64_t> clk_hz(process->getSyscallArg(tc, 1));
           *clk_hz = htog((uint64_t)1024);
           clk_hz.copyOut(tc->getMemPort());
           return 1;
@@ -141,12 +142,12 @@ static SyscallReturn
 setsysinfoFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
                ThreadContext *tc)
 {
-    unsigned op = tc->getSyscallArg(0);
+    unsigned op = process->getSyscallArg(tc, 0);
 
     switch (op) {
       case AlphaTru64::SSI_IEEE_FP_CONTROL:
         warn("setsysinfo: ignoring ieee_set_fp_control() arg 0x%x\n",
-             tc->getSyscallArg(1));
+             process->getSyscallArg(tc, 1));
         break;
 
       default:
@@ -164,17 +165,17 @@ tableFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
 {
     using namespace std;
 
-    int id = tc->getSyscallArg(0);      // table ID
-    int index = tc->getSyscallArg(1);   // index into table
+    int id = process->getSyscallArg(tc, 0);      // table ID
+    int index = process->getSyscallArg(tc, 1);   // index into table
     // arg 2 is buffer pointer; type depends on table ID
-    int nel = tc->getSyscallArg(3);     // number of elements
-    int lel = tc->getSyscallArg(4);     // expected element size
+    int nel = process->getSyscallArg(tc, 3);     // number of elements
+    int lel = process->getSyscallArg(tc, 4);     // expected element size
 
     switch (id) {
       case AlphaTru64::TBL_SYSINFO: {
           if (index != 0 || nel != 1 || lel != sizeof(Tru64::tbl_sysinfo))
               return -EINVAL;
-          TypedBufferArg<Tru64::tbl_sysinfo> elp(tc->getSyscallArg(2));
+          TypedBufferArg<Tru64::tbl_sysinfo> elp(process->getSyscallArg(tc, 2));
 
           const int clk_hz = one_million;
           elp->si_user = htog(curTick / (Clock::Frequency / clk_hz));
diff --git a/src/arch/alpha/utility.cc b/src/arch/alpha/utility.cc
index 2cf64b799..763da0d4f 100644
--- a/src/arch/alpha/utility.cc
+++ b/src/arch/alpha/utility.cc
@@ -42,11 +42,12 @@ uint64_t
 getArgument(ThreadContext *tc, int number, bool fp)
 {
 #if FULL_SYSTEM
+    const int NumArgumentRegs = 6;
     if (number < NumArgumentRegs) {
         if (fp)
-            return tc->readFloatRegBits(ArgumentReg[number]);
+            return tc->readFloatRegBits(16 + number);
         else
-            return tc->readIntReg(ArgumentReg[number]);
+            return tc->readIntReg(16 + number);
     } else {
         Addr sp = tc->readIntReg(StackPointerReg);
         VirtualPort *vp = tc->getVirtPort();
diff --git a/src/arch/mips/isa_traits.hh b/src/arch/mips/isa_traits.hh
index 3450c273e..ed4ed9877 100644
--- a/src/arch/mips/isa_traits.hh
+++ b/src/arch/mips/isa_traits.hh
@@ -190,13 +190,6 @@ namespace MipsISA
     // semantically meaningful register indices
     const int ZeroReg = 0;
     const int AssemblerReg = 1;
-    const int ReturnValueReg = 2;
-    const int ReturnValueReg1 = 2;
-    const int ReturnValueReg2 = 3;
-    const int ArgumentReg0 = 4;
-    const int ArgumentReg1 = 5;
-    const int ArgumentReg2 = 6;
-    const int ArgumentReg3 = 7;
     const int KernelReg0 = 26;
     const int KernelReg1 = 27;
     const int GlobalPointerReg = 28;
@@ -204,12 +197,7 @@ namespace MipsISA
     const int FramePointerReg = 30;
     const int ReturnAddressReg = 31;
 
-    const int ArgumentReg[] = {4, 5, 6, 7};
-    const int NumArgumentRegs = sizeof(ArgumentReg) / sizeof(const int);
-
-    const int SyscallNumReg = ReturnValueReg1;
-    const int SyscallPseudoReturnReg = ReturnValueReg2;
-    const int SyscallSuccessReg = ArgumentReg3;
+    const int SyscallPseudoReturnReg = 3;
 
     const int LogVMPageSize = 13;       // 8K bytes
     const int VMPageSize = (1 << LogVMPageSize);
diff --git a/src/arch/mips/linux/process.cc b/src/arch/mips/linux/process.cc
index 9d9d33325..dc3b84ced 100644
--- a/src/arch/mips/linux/process.cc
+++ b/src/arch/mips/linux/process.cc
@@ -51,7 +51,7 @@ static SyscallReturn
 unameFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
           ThreadContext *tc)
 {
-    TypedBufferArg<Linux::utsname> name(tc->getSyscallArg(0));
+    TypedBufferArg<Linux::utsname> name(process->getSyscallArg(tc, 0));
 
     strcpy(name->sysname, "Linux");
     strcpy(name->nodename,"m5.eecs.umich.edu");
@@ -70,13 +70,13 @@ static SyscallReturn
 sys_getsysinfoFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
                    ThreadContext *tc)
 {
-    unsigned op = tc->getSyscallArg(0);
-    // unsigned nbytes = tc->getSyscallArg(2);
+    unsigned op = process->getSyscallArg(tc, 0);
+    // unsigned nbytes = process->getSyscallArg(tc, 2);
 
     switch (op) {
 
       case 45: { // GSI_IEEE_FP_CONTROL
-          TypedBufferArg<uint64_t> fpcr(tc->getSyscallArg(1));
+          TypedBufferArg<uint64_t> fpcr(process->getSyscallArg(tc, 1));
           // I don't think this exactly matches the HW FPCR
           *fpcr = 0;
           fpcr.copyOut(tc->getMemPort());
@@ -97,13 +97,13 @@ static SyscallReturn
 sys_setsysinfoFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
                    ThreadContext *tc)
 {
-    unsigned op = tc->getSyscallArg(0);
-    // unsigned nbytes = tc->getSyscallArg(2);
+    unsigned op = process->getSyscallArg(tc, 0);
+    // unsigned nbytes = process->getSyscallArg(tc, 2);
 
     switch (op) {
 
       case 14: { // SSI_IEEE_FP_CONTROL
-          TypedBufferArg<uint64_t> fpcr(tc->getSyscallArg(1));
+          TypedBufferArg<uint64_t> fpcr(process->getSyscallArg(tc, 1));
           // I don't think this exactly matches the HW FPCR
           fpcr.copyIn(tc->getMemPort());
           DPRINTFR(SyscallVerbose, "sys_setsysinfo(SSI_IEEE_FP_CONTROL): "
diff --git a/src/arch/mips/process.cc b/src/arch/mips/process.cc
index b7bd22d78..784ddfe33 100644
--- a/src/arch/mips/process.cc
+++ b/src/arch/mips/process.cc
@@ -40,6 +40,10 @@
 using namespace std;
 using namespace MipsISA;
 
+static const int SyscallSuccessReg = 7;
+static const int FirstArgumentReg = 4;
+static const int ReturnValueReg = 2;
+
 MipsLiveProcess::MipsLiveProcess(LiveProcessParams * params,
         ObjectFile *objFile)
     : LiveProcess(params, objFile)
@@ -64,3 +68,33 @@ MipsLiveProcess::startup()
 {
     argsInit(MachineBytes, VMPageSize);
 }
+
+MipsISA::IntReg
+MipsLiveProcess::getSyscallArg(ThreadContext *tc, int i)
+{
+    assert(i < 6);
+    return tc->readIntReg(FirstArgumentReg + i);
+}
+
+void
+MipsLiveProcess::setSyscallArg(ThreadContext *tc,
+        int i, MipsISA::IntReg val)
+{
+    assert(i < 6);
+    tc->setIntReg(FirstArgumentReg + i, val);
+}
+
+void
+MipsLiveProcess::setSyscallReturn(ThreadContext *tc,
+        SyscallReturn return_value)
+{
+    if (return_value.successful()) {
+        // no error
+        tc->setIntReg(SyscallSuccessReg, 0);
+        tc->setIntReg(ReturnValueReg, return_value.value());
+    } else {
+        // got an error, return details
+        tc->setIntReg(SyscallSuccessReg, (IntReg) -1);
+        tc->setIntReg(ReturnValueReg, -return_value.value());
+    }
+}
diff --git a/src/arch/mips/process.hh b/src/arch/mips/process.hh
index 18bf289b8..87c62330f 100644
--- a/src/arch/mips/process.hh
+++ b/src/arch/mips/process.hh
@@ -47,6 +47,10 @@ class MipsLiveProcess : public LiveProcess
 
     virtual void startup();
 
+  public:
+    MipsISA::IntReg getSyscallArg(ThreadContext *tc, int i);
+    void setSyscallArg(ThreadContext *tc, int i, MipsISA::IntReg val);
+    void setSyscallReturn(ThreadContext *tc, SyscallReturn return_value);
 };
 
 
diff --git a/src/arch/mips/syscallreturn.hh b/src/arch/mips/syscallreturn.hh
deleted file mode 100644
index 24a40ddcc..000000000
--- a/src/arch/mips/syscallreturn.hh
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
- * Copyright (c) 2007 MIPS Technologies, Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met: redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer;
- * redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution;
- * neither the name of the copyright holders nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * Authors: Gabe Black
- *          Korey Sewell
- */
-
-#ifndef __ARCH_MIPS_SYSCALLRETURN_HH__
-#define __ARCH_MIPS_SYSCALLRETURN_HH__
-
-#include "sim/syscallreturn.hh"
-#include "cpu/thread_context.hh"
-
-namespace MipsISA
-{
-    static inline void setSyscallReturn(SyscallReturn return_value,
-            ThreadContext *tc)
-    {
-        if (return_value.successful()) {
-            // no error
-            tc->setIntReg(SyscallSuccessReg, 0);
-            tc->setIntReg(ReturnValueReg1, return_value.value());
-        } else {
-            // got an error, return details
-            tc->setIntReg(SyscallSuccessReg, (IntReg) -1);
-            tc->setIntReg(ReturnValueReg1, -return_value.value());
-        }
-    }
-}
-
-#endif
diff --git a/src/arch/sparc/isa_traits.hh b/src/arch/sparc/isa_traits.hh
index 30455792f..501f2f990 100644
--- a/src/arch/sparc/isa_traits.hh
+++ b/src/arch/sparc/isa_traits.hh
@@ -68,16 +68,12 @@ namespace SparcISA
     // semantically meaningful register indices
     const int ZeroReg = 0;      // architecturally meaningful
     // the rest of these depend on the ABI
-    const int StackPointerReg = 14;
     const int ReturnAddressReg = 31; // post call, precall is 15
-    const int ReturnValueReg = 8; // Post return, 24 is pre-return.
+    const int StackPointerReg = 14;
     const int FramePointerReg = 30;
 
-    const int ArgumentReg[] = {8, 9, 10, 11, 12, 13};
-    const int NumArgumentRegs = sizeof(ArgumentReg) / sizeof(const int);
-
     // Some OS syscall use a second register (o1) to return a second value
-    const int SyscallPseudoReturnReg = ArgumentReg[1];
+    const int SyscallPseudoReturnReg = 9;
 
     //8K. This value is implmentation specific; and should probably
     //be somewhere else.
diff --git a/src/arch/sparc/linux/process.hh b/src/arch/sparc/linux/process.hh
index 06eee9235..a76b4b3b2 100644
--- a/src/arch/sparc/linux/process.hh
+++ b/src/arch/sparc/linux/process.hh
@@ -32,7 +32,6 @@
 #define __SPARC_LINUX_PROCESS_HH__
 
 #include "arch/sparc/linux/linux.hh"
-#include "arch/sparc/syscallreturn.hh"
 #include "arch/sparc/process.hh"
 #include "sim/process.hh"
 
diff --git a/src/arch/sparc/linux/syscalls.cc b/src/arch/sparc/linux/syscalls.cc
index 3e8c603cd..8496fca13 100644
--- a/src/arch/sparc/linux/syscalls.cc
+++ b/src/arch/sparc/linux/syscalls.cc
@@ -29,7 +29,6 @@
  */
 
 #include "arch/sparc/linux/process.hh"
-#include "arch/sparc/syscallreturn.hh"
 #include "sim/syscall_emul.hh"
 
 class LiveProcess;
@@ -42,7 +41,7 @@ static SyscallReturn
 unameFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
         ThreadContext *tc)
 {
-    TypedBufferArg<Linux::utsname> name(tc->getSyscallArg(0));
+    TypedBufferArg<Linux::utsname> name(process->getSyscallArg(tc, 0));
 
     strcpy(name->sysname, "Linux");
     strcpy(name->nodename, "m5.eecs.umich.edu");
@@ -60,9 +59,9 @@ SyscallReturn getresuidFunc(SyscallDesc *desc, int num,
         LiveProcess *p, ThreadContext *tc)
 {
     const IntReg id = htog(100);
-    Addr ruid = tc->getSyscallArg(0);
-    Addr euid = tc->getSyscallArg(1);
-    Addr suid = tc->getSyscallArg(2);
+    Addr ruid = p->getSyscallArg(tc, 0);
+    Addr euid = p->getSyscallArg(tc, 1);
+    Addr suid = p->getSyscallArg(tc, 2);
     //Handle the EFAULT case
     //Set the ruid
     if(ruid)
diff --git a/src/arch/sparc/process.cc b/src/arch/sparc/process.cc
index 515389687..b2b539816 100644
--- a/src/arch/sparc/process.cc
+++ b/src/arch/sparc/process.cc
@@ -46,6 +46,9 @@
 using namespace std;
 using namespace SparcISA;
 
+static const int FirstArgumentReg = 8;
+static const int ReturnValueReg = 8;
+
 
 SparcLiveProcess::SparcLiveProcess(LiveProcessParams * params,
         ObjectFile *objFile, Addr _StackBias)
@@ -509,3 +512,63 @@ void Sparc64LiveProcess::flushWindows(ThreadContext *tc)
     tc->setIntReg(NumIntArchRegs + 4, Canrestore);
     tc->setMiscReg(MISCREG_CWP, origCWP);
 }
+
+IntReg
+Sparc32LiveProcess::getSyscallArg(ThreadContext *tc, int i)
+{
+    assert(i < 6);
+    return bits(tc->readIntReg(FirstArgumentReg + i), 31, 0);
+}
+
+void
+Sparc32LiveProcess::setSyscallArg(ThreadContext *tc, int i, IntReg val)
+{
+    assert(i < 6);
+    tc->setIntReg(FirstArgumentReg + i, bits(val, 31, 0));
+}
+
+IntReg
+Sparc64LiveProcess::getSyscallArg(ThreadContext *tc, int i)
+{
+    assert(i < 6);
+    return tc->readIntReg(FirstArgumentReg + i);
+}
+
+void
+Sparc64LiveProcess::setSyscallArg(ThreadContext *tc, int i, IntReg val)
+{
+    assert(i < 6);
+    tc->setIntReg(FirstArgumentReg + i, val);
+}
+
+void
+SparcLiveProcess::setSyscallReturn(ThreadContext *tc,
+        SyscallReturn return_value)
+{
+    // check for error condition.  SPARC syscall convention is to
+    // indicate success/failure in reg the carry bit of the ccr
+    // and put the return value itself in the standard return value reg ().
+    if (return_value.successful()) {
+        // no error, clear XCC.C
+        tc->setIntReg(NumIntArchRegs + 2,
+                tc->readIntReg(NumIntArchRegs + 2) & 0xEE);
+        //tc->setMiscRegNoEffect(MISCREG_CCR, tc->readMiscRegNoEffect(MISCREG_CCR) & 0xEE);
+        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);
+        IntReg val = -return_value.value();
+        if (bits(tc->readMiscRegNoEffect(
+                        SparcISA::MISCREG_PSTATE), 3, 3)) {
+            val = bits(val, 31, 0);
+        }
+        tc->setIntReg(ReturnValueReg, val);
+    }
+}
diff --git a/src/arch/sparc/process.hh b/src/arch/sparc/process.hh
index 95abb93d3..fdb9734ba 100644
--- a/src/arch/sparc/process.hh
+++ b/src/arch/sparc/process.hh
@@ -69,6 +69,7 @@ class SparcLiveProcess : public LiveProcess
     { return spillStart; }
 
     virtual void flushWindows(ThreadContext *tc) = 0;
+    void setSyscallReturn(ThreadContext *tc, SyscallReturn return_value);
 };
 
 class Sparc32LiveProcess : public SparcLiveProcess
@@ -93,6 +94,9 @@ class Sparc32LiveProcess : public SparcLiveProcess
     void argsInit(int intSize, int pageSize);
 
     void flushWindows(ThreadContext *tc);
+
+    SparcISA::IntReg getSyscallArg(ThreadContext *tc, int i);
+    void setSyscallArg(ThreadContext *tc, int i, SparcISA::IntReg val);
 };
 
 class Sparc64LiveProcess : public SparcLiveProcess
@@ -118,6 +122,9 @@ class Sparc64LiveProcess : public SparcLiveProcess
     void argsInit(int intSize, int pageSize);
 
     void flushWindows(ThreadContext *tc);
+
+    SparcISA::IntReg getSyscallArg(ThreadContext *tc, int i);
+    void setSyscallArg(ThreadContext *tc, int i, SparcISA::IntReg val);
 };
 
 #endif // __SPARC_PROCESS_HH__
diff --git a/src/arch/sparc/solaris/process.cc b/src/arch/sparc/solaris/process.cc
index e4f6b23c8..1a4940b59 100644
--- a/src/arch/sparc/solaris/process.cc
+++ b/src/arch/sparc/solaris/process.cc
@@ -48,7 +48,7 @@ static SyscallReturn
 unameFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
           ThreadContext *tc)
 {
-    TypedBufferArg<Solaris::utsname> name(tc->getSyscallArg(0));
+    TypedBufferArg<Solaris::utsname> name(process->getSyscallArg(tc, 0));
 
     strcpy(name->sysname, "SunOS");
     strcpy(name->nodename, "m5.eecs.umich.edu");
diff --git a/src/arch/sparc/syscallreturn.hh b/src/arch/sparc/syscallreturn.hh
deleted file mode 100644
index d4e6c7c50..000000000
--- a/src/arch/sparc/syscallreturn.hh
+++ /dev/null
@@ -1,74 +0,0 @@
-/*
- * Copyright (c) 2003-2005 The Regents of The University of Michigan
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met: redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer;
- * redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution;
- * neither the name of the copyright holders nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * Authors: Gabe Black
- */
-
-#ifndef __ARCH_SPARC_SYSCALLRETURN_HH__
-#define __ARCH_SPARC_SYSCALLRETURN_HH__
-
-#include <inttypes.h>
-
-#include "sim/syscallreturn.hh"
-#include "arch/sparc/regfile.hh"
-#include "cpu/thread_context.hh"
-
-namespace SparcISA
-{
-    static inline void setSyscallReturn(SyscallReturn return_value,
-            ThreadContext * tc)
-    {
-        // check for error condition.  SPARC syscall convention is to
-        // indicate success/failure in reg the carry bit of the ccr
-        // and put the return value itself in the standard return value reg ().
-        if (return_value.successful()) {
-            // no error, clear XCC.C
-            tc->setIntReg(NumIntArchRegs + 2,
-                    tc->readIntReg(NumIntArchRegs + 2) & 0xEE);
-            //tc->setMiscRegNoEffect(MISCREG_CCR, tc->readMiscRegNoEffect(MISCREG_CCR) & 0xEE);
-            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);
-            IntReg val = -return_value.value();
-            if (bits(tc->readMiscRegNoEffect(
-                            SparcISA::MISCREG_PSTATE), 3, 3)) {
-                val = bits(val, 31, 0);
-            }
-            tc->setIntReg(ReturnValueReg, val);
-        }
-    }
-};
-
-#endif
diff --git a/src/arch/sparc/utility.cc b/src/arch/sparc/utility.cc
index 8f5c3e036..d4cc286e6 100644
--- a/src/arch/sparc/utility.cc
+++ b/src/arch/sparc/utility.cc
@@ -46,8 +46,9 @@ namespace SparcISA {
 //first 6 arguments which the caller may use but doesn't have to.
 uint64_t getArgument(ThreadContext *tc, int number, bool fp) {
 #if FULL_SYSTEM
+    const int NumArgumentRegs = 6;
     if (number < NumArgumentRegs) {
-        return tc->readIntReg(ArgumentReg[number]);
+        return tc->readIntReg(8 + number);
     } else {
         Addr sp = tc->readIntReg(StackPointerReg);
         VirtualPort *vp = tc->getVirtPort();
diff --git a/src/arch/x86/isa_traits.hh b/src/arch/x86/isa_traits.hh
index abb7694ed..d25e0eb70 100644
--- a/src/arch/x86/isa_traits.hh
+++ b/src/arch/x86/isa_traits.hh
@@ -106,19 +106,7 @@ namespace X86ISA
     const int StackPointerReg = INTREG_RSP;
     //X86 doesn't seem to have a link register
     const int ReturnAddressReg = 0;
-    const int ReturnValueReg = INTREG_RAX;
     const int FramePointerReg = INTREG_RBP;
-    const int ArgumentReg[] = {
-        INTREG_RDI,
-        INTREG_RSI,
-        INTREG_RDX,
-        //This argument register is r10 for syscalls and rcx for C.
-        INTREG_R10W,
-        //INTREG_RCX,
-        INTREG_R8W,
-        INTREG_R9W
-    };
-    const int NumArgumentRegs = sizeof(ArgumentReg) / sizeof(const int);
 
     // Some OS syscalls use a second register (rdx) to return a second
     // value
diff --git a/src/arch/x86/linux/process.hh b/src/arch/x86/linux/process.hh
index 2f37692e3..ca3606ef0 100644
--- a/src/arch/x86/linux/process.hh
+++ b/src/arch/x86/linux/process.hh
@@ -60,7 +60,6 @@
 
 #include "sim/process.hh"
 #include "arch/x86/linux/linux.hh"
-#include "arch/x86/syscallreturn.hh"
 #include "arch/x86/process.hh"
 
 namespace X86ISA {
diff --git a/src/arch/x86/linux/syscalls.cc b/src/arch/x86/linux/syscalls.cc
index 324749366..e4e0fa234 100644
--- a/src/arch/x86/linux/syscalls.cc
+++ b/src/arch/x86/linux/syscalls.cc
@@ -68,7 +68,7 @@ static SyscallReturn
 unameFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
           ThreadContext *tc)
 {
-    TypedBufferArg<Linux::utsname> name(tc->getSyscallArg(0));
+    TypedBufferArg<Linux::utsname> name(process->getSyscallArg(tc, 0));
 
     strcpy(name->sysname, "Linux");
     strcpy(name->nodename, "m5.eecs.umich.edu");
@@ -94,8 +94,8 @@ archPrctlFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
     };
 
     //First argument is the code, second is the address
-    int code = tc->getSyscallArg(0);
-    uint64_t addr = tc->getSyscallArg(1);
+    int code = process->getSyscallArg(tc, 0);
+    uint64_t addr = process->getSyscallArg(tc, 1);
     uint64_t fsBase, gsBase;
     TranslatingPort *p = tc->getMemPort();
     switch(code)
diff --git a/src/arch/x86/process.cc b/src/arch/x86/process.cc
index 800dd44ef..7d7978a35 100644
--- a/src/arch/x86/process.cc
+++ b/src/arch/x86/process.cc
@@ -104,6 +104,18 @@
 using namespace std;
 using namespace X86ISA;
 
+static const int ReturnValueReg = INTREG_RAX;
+static const int ArgumentReg[] = {
+    INTREG_RDI,
+    INTREG_RSI,
+    INTREG_RDX,
+    //This argument register is r10 for syscalls and rcx for C.
+    INTREG_R10W,
+    //INTREG_RCX,
+    INTREG_R8W,
+    INTREG_R9W
+};
+static const int NumArgumentRegs = sizeof(ArgumentReg) / sizeof(const int);
 
 X86LiveProcess::X86LiveProcess(LiveProcessParams * params, ObjectFile *objFile,
         SyscallDesc *_syscallDescs, int _numSyscallDescs) :
@@ -574,3 +586,35 @@ I386LiveProcess::argsInit(int intSize, int pageSize)
 {
     X86LiveProcess::argsInit<uint32_t>(pageSize);
 }
+
+void
+X86LiveProcess::setSyscallReturn(ThreadContext *tc, SyscallReturn return_value)
+{
+    tc->setIntReg(INTREG_RAX, return_value.value());
+}
+
+X86ISA::IntReg
+X86_64LiveProcess::getSyscallArg(ThreadContext *tc, int i)
+{
+    assert(i < NumArgumentRegs);
+    return tc->readIntReg(ArgumentReg[i]);
+}
+
+void
+X86_64LiveProcess::setSyscallArg(ThreadContext *tc, int i, X86ISA::IntReg val)
+{
+    assert(i < NumArgumentRegs);
+    return tc->setIntReg(ArgumentReg[i], val);
+}
+
+X86ISA::IntReg
+I386LiveProcess::getSyscallArg(ThreadContext *tc, int i)
+{
+    panic("32 bit getSyscallArg not implemented.\n");
+}
+
+void
+I386LiveProcess::setSyscallArg(ThreadContext *tc, int i, X86ISA::IntReg val)
+{
+    panic("32 bit setSyscallArg not implemented.\n");
+}
diff --git a/src/arch/x86/process.hh b/src/arch/x86/process.hh
index 8d77bd79d..e337e589e 100644
--- a/src/arch/x86/process.hh
+++ b/src/arch/x86/process.hh
@@ -81,6 +81,8 @@ namespace X86ISA
 
       public:
         SyscallDesc* getDesc(int callnum);
+
+        void setSyscallReturn(ThreadContext *tc, SyscallReturn return_value);
     };
 
     class X86_64LiveProcess : public X86LiveProcess
@@ -92,6 +94,9 @@ namespace X86ISA
       public:
         void argsInit(int intSize, int pageSize);
         void startup();
+
+        X86ISA::IntReg getSyscallArg(ThreadContext *tc, int i);
+        void setSyscallArg(ThreadContext *tc, int i, X86ISA::IntReg val);
     };
 
     class I386LiveProcess : public X86LiveProcess
@@ -103,6 +108,9 @@ namespace X86ISA
       public:
         void argsInit(int intSize, int pageSize);
         void startup();
+
+        X86ISA::IntReg getSyscallArg(ThreadContext *tc, int i);
+        void setSyscallArg(ThreadContext *tc, int i, X86ISA::IntReg val);
     };
 }
 
diff --git a/src/arch/x86/syscallreturn.hh b/src/arch/x86/syscallreturn.hh
deleted file mode 100644
index 6a7fdba58..000000000
--- a/src/arch/x86/syscallreturn.hh
+++ /dev/null
@@ -1,74 +0,0 @@
-/*
- * Copyright (c) 2007 The Hewlett-Packard Development Company
- * All rights reserved.
- *
- * Redistribution and use of this software in source and binary forms,
- * with or without modification, are permitted provided that the
- * following conditions are met:
- *
- * The software must be used only for Non-Commercial Use which means any
- * use which is NOT directed to receiving any direct monetary
- * compensation for, or commercial advantage from such use.  Illustrative
- * examples of non-commercial use are academic research, personal study,
- * teaching, education and corporate research & development.
- * Illustrative examples of commercial use are distributing products for
- * commercial advantage and providing services using the software for
- * commercial advantage.
- *
- * If you wish to use this software or functionality therein that may be
- * covered by patents for commercial use, please contact:
- *     Director of Intellectual Property Licensing
- *     Office of Strategy and Technology
- *     Hewlett-Packard Company
- *     1501 Page Mill Road
- *     Palo Alto, California  94304
- *
- * Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.  Redistributions
- * in binary form must reproduce the above copyright notice, this list of
- * conditions and the following disclaimer in the documentation and/or
- * other materials provided with the distribution.  Neither the name of
- * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.  No right of
- * sublicense is granted herewith.  Derivatives of the software and
- * output created using the software may be prepared, but only for
- * Non-Commercial Uses.  Derivatives of the software may be shared with
- * others provided: (i) the others agree to abide by the list of
- * conditions herein which includes the Non-Commercial Use restrictions;
- * and (ii) such Derivatives of the software include the above copyright
- * notice to acknowledge the contribution from this software where
- * applicable, this list of conditions and the disclaimer below.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * Authors: Gabe Black
- */
-
-#ifndef __ARCH_X86_SYSCALLRETURN_HH__
-#define __ARCH_X86_SYSCALLRETURN_HH__
-
-#include "base/misc.hh"
-#include "cpu/thread_context.hh"
-#include "sim/syscallreturn.hh"
-
-namespace X86ISA
-{
-    static inline void setSyscallReturn(SyscallReturn return_value,
-            ThreadContext * tc)
-    {
-        tc->setIntReg(INTREG_RAX, return_value.value());
-    }
-};
-
-#endif // __ARCH_X86_SYSCALLRETURN_HH__
diff --git a/src/cpu/checker/thread_context.hh b/src/cpu/checker/thread_context.hh
index 524e87cd4..3c87f841f 100644
--- a/src/cpu/checker/thread_context.hh
+++ b/src/cpu/checker/thread_context.hh
@@ -277,21 +277,6 @@ class CheckerThreadContext : public ThreadContext
     bool misspeculating() { return actualTC->misspeculating(); }
 
 #if !FULL_SYSTEM
-    IntReg getSyscallArg(int i) { return actualTC->getSyscallArg(i); }
-
-    // used to shift args for indirect syscall
-    void setSyscallArg(int i, IntReg val)
-    {
-        checkerTC->setSyscallArg(i, val);
-        actualTC->setSyscallArg(i, val);
-    }
-
-    void setSyscallReturn(SyscallReturn return_value)
-    {
-        checkerTC->setSyscallReturn(return_value);
-        actualTC->setSyscallReturn(return_value);
-    }
-
     Counter readFuncExeInst() { return actualTC->readFuncExeInst(); }
 #endif
 };
diff --git a/src/cpu/inorder/cpu.cc b/src/cpu/inorder/cpu.cc
index adbf645f4..c22dd1154 100644
--- a/src/cpu/inorder/cpu.cc
+++ b/src/cpu/inorder/cpu.cc
@@ -1281,32 +1281,6 @@ InOrderCPU::syscall(int64_t callnum, int tid)
     nonSpecInstActive[tid] = false;
 }
 
-IntReg
-InOrderCPU::getSyscallArg(int idx, int tid)
-{
-    return readIntReg(ArgumentReg0 + idx, tid);
-}
-
-void
-InOrderCPU::setSyscallArg(int idx, IntReg val, int tid)
-{
-    setIntReg(ArgumentReg0 + idx, val, tid);
-}
-
-void
-InOrderCPU::setSyscallReturn(SyscallReturn return_value, int tid)
-{
-    if (return_value.successful()) {
-        // no error
-        setIntReg(SyscallSuccessReg, 0, tid);
-        setIntReg(ReturnValueReg, return_value.value(), tid);
-    } else {
-        // got an error, return details
-        setIntReg(SyscallSuccessReg, (IntReg) -1, tid);
-        setIntReg(ReturnValueReg, -return_value.value(), tid);
-    }
-}
-
 Fault
 InOrderCPU::read(DynInstPtr inst)
 {
diff --git a/src/cpu/inorder/cpu.hh b/src/cpu/inorder/cpu.hh
index 4a7dfb404..e27687a72 100644
--- a/src/cpu/inorder/cpu.hh
+++ b/src/cpu/inorder/cpu.hh
@@ -511,15 +511,6 @@ class InOrderCPU : public BaseCPU
     /** Executes a syscall.*/
     void syscall(int64_t callnum, int tid);
 
-    /** Gets a syscall argument. */
-    IntReg getSyscallArg(int i, int tid);
-
-    /** Used to shift args for indirect syscall. */
-    void setSyscallArg(int i, IntReg val, int tid);
-
-    /** Sets the return value of a syscall. */
-    void setSyscallReturn(SyscallReturn return_value, int tid);
-
   public:
     /** Per-Thread List of all the instructions in flight. */
     std::list<DynInstPtr> instList[ThePipeline::MaxThreads];
diff --git a/src/cpu/inorder/thread_context.cc b/src/cpu/inorder/thread_context.cc
index 2470ee676..13f8ecdad 100644
--- a/src/cpu/inorder/thread_context.cc
+++ b/src/cpu/inorder/thread_context.cc
@@ -262,21 +262,3 @@ InOrderThreadContext::setMiscReg(int misc_reg, const MiscReg &val)
 {
     cpu->setMiscReg(misc_reg, val, thread->readTid());
 }
-
-TheISA::IntReg
-InOrderThreadContext::getSyscallArg(int i)
-{
-    return cpu->getSyscallArg(i, thread->readTid());
-}
-
-void
-InOrderThreadContext::setSyscallArg(int i, IntReg val)
-{
-    cpu->setSyscallArg(i, val, thread->readTid());
-}
-
-void
-InOrderThreadContext::setSyscallReturn(SyscallReturn return_value)
-{
-    cpu->setSyscallReturn(return_value, thread->readTid());
-}
diff --git a/src/cpu/inorder/thread_context.hh b/src/cpu/inorder/thread_context.hh
index 708dcf6b3..dce150b47 100644
--- a/src/cpu/inorder/thread_context.hh
+++ b/src/cpu/inorder/thread_context.hh
@@ -236,15 +236,6 @@ class InOrderThreadContext : public ThreadContext
      * misspeculating, this is set as false. */
     virtual bool misspeculating() { return false; }
 
-    /** Gets a syscall argument by index. */
-    virtual IntReg getSyscallArg(int i);
-
-    /** Sets a syscall argument. */
-    virtual void setSyscallArg(int i, IntReg val);
-
-    /** Sets the syscall return value. */
-    virtual void setSyscallReturn(SyscallReturn return_value);
-
     /** Executes a syscall in SE mode. */
     virtual void syscall(int64_t callnum)
     { return cpu->syscall(callnum, thread->readTid()); }
diff --git a/src/cpu/o3/cpu.cc b/src/cpu/o3/cpu.cc
index 4f6d5d41c..1d7fb97c0 100644
--- a/src/cpu/o3/cpu.cc
+++ b/src/cpu/o3/cpu.cc
@@ -420,34 +420,6 @@ FullO3CPU<Impl>::FullO3CPU(DerivO3CPUParams *params)
     lockFlag = false;
 }
 
-#if !FULL_SYSTEM
-
-template <class Impl>
-TheISA::IntReg
-FullO3CPU<Impl>::getSyscallArg(int i, int tid)
-{
-    assert(i < TheISA::NumArgumentRegs);
-    TheISA::IntReg idx = TheISA::flattenIntIndex(this->tcBase(tid),
-            TheISA::ArgumentReg[i]);
-    TheISA::IntReg val = this->readArchIntReg(idx, tid);
-#if THE_ISA == SPARC_ISA
-    if (bits(this->readMiscRegNoEffect(SparcISA::MISCREG_PSTATE, tid), 3, 3))
-        val = bits(val, 31, 0);
-#endif
-    return val;
-}
-
-template <class Impl>
-void
-FullO3CPU<Impl>::setSyscallArg(int i, TheISA::IntReg val, int tid)
-{
-    assert(i < TheISA::NumArgumentRegs);
-    TheISA::IntReg idx = TheISA::flattenIntIndex(this->tcBase(tid),
-            TheISA::ArgumentReg[i]);
-    this->setArchIntReg(idx, val, tid);
-}
-#endif
-
 template <class Impl>
 FullO3CPU<Impl>::~FullO3CPU()
 {
@@ -1000,13 +972,6 @@ FullO3CPU<Impl>::syscall(int64_t callnum, int tid)
     --(this->thread[tid]->funcExeInst);
 }
 
-template <class Impl>
-void
-FullO3CPU<Impl>::setSyscallReturn(SyscallReturn return_value, int tid)
-{
-    TheISA::setSyscallReturn(return_value, this->tcBase(tid));
-}
-
 #endif
 
 template <class Impl>
diff --git a/src/cpu/o3/cpu.hh b/src/cpu/o3/cpu.hh
index 683e4284f..f4ed28e8e 100644
--- a/src/cpu/o3/cpu.hh
+++ b/src/cpu/o3/cpu.hh
@@ -193,13 +193,6 @@ class FullO3CPU : public BaseO3CPU
             activateThreadEvent[tid].squash();
     }
 
-#if !FULL_SYSTEM
-    TheISA::IntReg getSyscallArg(int i, int tid);
-
-    /** Used to shift args for indirect syscall. */
-    void setSyscallArg(int i, TheISA::IntReg val, int tid);
-#endif
-
     /** The tick event used for scheduling CPU ticks. */
     ActivateThreadEvent activateThreadEvent[Impl::MaxThreads];
 
@@ -354,10 +347,6 @@ class FullO3CPU : public BaseO3CPU
      * @todo: Determine if this needs to be virtual.
      */
     void syscall(int64_t callnum, int tid);
-
-    /** Sets the return value of a syscall. */
-    void setSyscallReturn(SyscallReturn return_value, int tid);
-
 #endif
 
     /** Starts draining the CPU's pipeline of all instructions in
diff --git a/src/cpu/o3/thread_context.hh b/src/cpu/o3/thread_context.hh
index 6de773ff1..f3058925d 100755
--- a/src/cpu/o3/thread_context.hh
+++ b/src/cpu/o3/thread_context.hh
@@ -247,15 +247,6 @@ class O3ThreadContext : public ThreadContext
     virtual bool misspeculating() { return false; }
 
 #if !FULL_SYSTEM
-    /** Gets a syscall argument by index. */
-    virtual IntReg getSyscallArg(int i);
-
-    /** Sets a syscall argument. */
-    virtual void setSyscallArg(int i, IntReg val);
-
-    /** Sets the syscall return value. */
-    virtual void setSyscallReturn(SyscallReturn return_value);
-
     /** Executes a syscall in SE mode. */
     virtual void syscall(int64_t callnum)
     { return cpu->syscall(callnum, thread->threadId()); }
diff --git a/src/cpu/o3/thread_context_impl.hh b/src/cpu/o3/thread_context_impl.hh
index 12b2d1b31..fc8b66b83 100755
--- a/src/cpu/o3/thread_context_impl.hh
+++ b/src/cpu/o3/thread_context_impl.hh
@@ -482,28 +482,3 @@ O3ThreadContext<Impl>::setMiscReg(int misc_reg,
     }
 }
 
-#if !FULL_SYSTEM
-
-template <class Impl>
-TheISA::IntReg
-O3ThreadContext<Impl>::getSyscallArg(int i)
-{
-    return cpu->getSyscallArg(i, thread->threadId());
-}
-
-template <class Impl>
-void
-O3ThreadContext<Impl>::setSyscallArg(int i, IntReg val)
-{
-    cpu->setSyscallArg(i, val, thread->threadId());
-}
-
-template <class Impl>
-void
-O3ThreadContext<Impl>::setSyscallReturn(SyscallReturn return_value)
-{
-    cpu->setSyscallReturn(return_value, thread->threadId());
-}
-
-#endif // FULL_SYSTEM
-
diff --git a/src/cpu/ozone/cpu.hh b/src/cpu/ozone/cpu.hh
index 0eb4b31f7..054fc1aa1 100644
--- a/src/cpu/ozone/cpu.hh
+++ b/src/cpu/ozone/cpu.hh
@@ -246,22 +246,6 @@ class OzoneCPU : public BaseCPU
         bool misspeculating() { return false; }
 
 #if !FULL_SYSTEM
-        TheISA::IntReg getSyscallArg(int i)
-        {
-            assert(i < TheISA::NumArgumentRegs);
-            return thread->renameTable[TheISA::ArgumentReg[i]]->readIntResult();
-        }
-
-        // used to shift args for indirect syscall
-        void setSyscallArg(int i, TheISA::IntReg val)
-        {
-            assert(i < TheISA::NumArgumentRegs);
-            thread->renameTable[TheISA::ArgumentReg[i]]->setIntResult(i);
-        }
-
-        void setSyscallReturn(SyscallReturn return_value)
-        { cpu->setSyscallReturn(return_value, thread->threadId()); }
-
         Counter readFuncExeInst() { return thread->funcExeInst; }
 
         void setFuncExeInst(Counter new_val)
@@ -468,7 +452,6 @@ class OzoneCPU : public BaseCPU
     void processInterrupts();
 #else
     void syscall(uint64_t &callnum);
-    void setSyscallReturn(SyscallReturn return_value, int tid);
 #endif
 
     ThreadContext *tcBase() { return tc; }
diff --git a/src/cpu/ozone/cpu_impl.hh b/src/cpu/ozone/cpu_impl.hh
index 84ee69464..aa76c8aa6 100644
--- a/src/cpu/ozone/cpu_impl.hh
+++ b/src/cpu/ozone/cpu_impl.hh
@@ -648,26 +648,6 @@ OzoneCPU<Impl>::syscall(uint64_t &callnum)
     frontEnd->renameTable.copyFrom(thread.renameTable);
     backEnd->renameTable.copyFrom(thread.renameTable);
 }
-
-template <class Impl>
-void
-OzoneCPU<Impl>::setSyscallReturn(SyscallReturn return_value, int tid)
-{
-    // check for error condition.  Alpha syscall convention is to
-    // indicate success/failure in reg a3 (r19) and put the
-    // return value itself in the standard return value reg (v0).
-    if (return_value.successful()) {
-        // no error
-        thread.renameTable[SyscallSuccessReg]->setIntResult(0);
-        thread.renameTable[ReturnValueReg]->setIntResult(
-            return_value.value());
-    } else {
-        // got an error, return details
-        thread.renameTable[SyscallSuccessReg]->setIntResult((IntReg) -1);
-        thread.renameTable[ReturnValueReg]->setIntResult(
-            -return_value.value());
-    }
-}
 #else
 template <class Impl>
 Fault
diff --git a/src/cpu/simple_thread.hh b/src/cpu/simple_thread.hh
index 4eba493c3..73929d362 100644
--- a/src/cpu/simple_thread.hh
+++ b/src/cpu/simple_thread.hh
@@ -34,7 +34,6 @@
 
 #include "arch/isa_traits.hh"
 #include "arch/regfile.hh"
-#include "arch/syscallreturn.hh"
 #include "arch/tlb.hh"
 #include "config/full_system.hh"
 #include "cpu/thread_context.hh"
@@ -367,33 +366,6 @@ class SimpleThread : public ThreadState
     { storeCondFailures = sc_failures; }
 
 #if !FULL_SYSTEM
-    TheISA::IntReg getSyscallArg(int i)
-    {
-        assert(i < TheISA::NumArgumentRegs);
-        TheISA::IntReg val = regs.readIntReg(
-                TheISA::flattenIntIndex(getTC(), TheISA::ArgumentReg[i]));
-#if THE_ISA == SPARC_ISA
-        if (bits(this->readMiscRegNoEffect(
-                        SparcISA::MISCREG_PSTATE), 3, 3)) {
-            val = bits(val, 31, 0);
-        }
-#endif
-        return val;
-    }
-
-    // used to shift args for indirect syscall
-    void setSyscallArg(int i, TheISA::IntReg val)
-    {
-        assert(i < TheISA::NumArgumentRegs);
-        regs.setIntReg(TheISA::flattenIntIndex(getTC(),
-                    TheISA::ArgumentReg[i]), val);
-    }
-
-    void setSyscallReturn(SyscallReturn return_value)
-    {
-        TheISA::setSyscallReturn(return_value, getTC());
-    }
-
     void syscall(int64_t callnum)
     {
         process->syscall(callnum, tc);
diff --git a/src/cpu/thread_context.hh b/src/cpu/thread_context.hh
index 7c3f11c12..700f1571e 100644
--- a/src/cpu/thread_context.hh
+++ b/src/cpu/thread_context.hh
@@ -38,7 +38,6 @@
 #include "sim/faults.hh"
 #include "sim/host.hh"
 #include "sim/serialize.hh"
-#include "sim/syscallreturn.hh"
 #include "sim/byteswap.hh"
 
 // @todo: Figure out a more architecture independent way to obtain the ITB and
@@ -258,13 +257,6 @@ class ThreadContext
     virtual bool misspeculating() = 0;
 
 #if !FULL_SYSTEM
-    virtual IntReg getSyscallArg(int i) = 0;
-
-    // used to shift args for indirect syscall
-    virtual void setSyscallArg(int i, IntReg val) = 0;
-
-    virtual void setSyscallReturn(SyscallReturn return_value) = 0;
-
     // Same with st cond failures.
     virtual Counter readFuncExeInst() = 0;
 
@@ -457,15 +449,6 @@ class ProxyThreadContext : public ThreadContext
     bool misspeculating() { return actualTC->misspeculating(); }
 
 #if !FULL_SYSTEM
-    IntReg getSyscallArg(int i) { return actualTC->getSyscallArg(i); }
-
-    // used to shift args for indirect syscall
-    void setSyscallArg(int i, IntReg val)
-    { actualTC->setSyscallArg(i, val); }
-
-    void setSyscallReturn(SyscallReturn return_value)
-    { actualTC->setSyscallReturn(return_value); }
-
     void syscall(int64_t callnum)
     { actualTC->syscall(callnum); }
 
diff --git a/src/kern/tru64/tru64.hh b/src/kern/tru64/tru64.hh
index 5f8307cd2..b1af4ec0e 100644
--- a/src/kern/tru64/tru64.hh
+++ b/src/kern/tru64/tru64.hh
@@ -437,10 +437,10 @@ class Tru64 : public OperatingSystem
 #ifdef __CYGWIN__
         panic("getdirent not implemented on cygwin!");
 #else
-        int fd = process->sim_fd(tc->getSyscallArg(0));
-        Addr tgt_buf = tc->getSyscallArg(1);
-        int tgt_nbytes = tc->getSyscallArg(2);
-        Addr tgt_basep = tc->getSyscallArg(3);
+        int fd = process->sim_fd(process->getSyscallArg(tc, 0));
+        Addr tgt_buf = process->getSyscallArg(tc, 1);
+        int tgt_nbytes = process->getSyscallArg(tc, 2);
+        Addr tgt_basep = process->getSyscallArg(tc, 3);
 
         char * const host_buf = new char[tgt_nbytes];
 
@@ -496,7 +496,7 @@ class Tru64 : public OperatingSystem
         using namespace TheISA;
 
         using TheISA::RegFile;
-        TypedBufferArg<Tru64::sigcontext> sc(tc->getSyscallArg(0));
+        TypedBufferArg<Tru64::sigcontext> sc(process->getSyscallArg(tc, 0));
 
         sc.copyIn(tc->getMemPort());
 
@@ -528,7 +528,7 @@ class Tru64 : public OperatingSystem
     {
         using namespace TheISA;
 
-        TypedBufferArg<Tru64::vm_stack> argp(tc->getSyscallArg(0));
+        TypedBufferArg<Tru64::vm_stack> argp(process->getSyscallArg(tc, 0));
 
         argp.copyIn(tc->getMemPort());
 
@@ -576,8 +576,9 @@ class Tru64 : public OperatingSystem
         using namespace std;
         using namespace TheISA;
 
-        TypedBufferArg<Tru64::nxm_task_attr> attrp(tc->getSyscallArg(0));
-        TypedBufferArg<Addr> configptr_ptr(tc->getSyscallArg(1));
+        TypedBufferArg<Tru64::nxm_task_attr>
+            attrp(process->getSyscallArg(tc, 0));
+        TypedBufferArg<Addr> configptr_ptr(process->getSyscallArg(tc, 1));
 
         attrp.copyIn(tc->getMemPort());
 
@@ -683,14 +684,14 @@ class Tru64 : public OperatingSystem
 
     /// Initialize thread context.
     static void
-    init_thread_context(ThreadContext *tc,
+    init_thread_context(LiveProcess *process, ThreadContext *tc,
                       Tru64::nxm_thread_attr *attrp, uint64_t uniq_val)
     {
         using namespace TheISA;
 
         tc->clearArchRegs();
 
-        tc->setIntReg(TheISA::ArgumentReg[0], gtoh(attrp->registers.a0));
+        process->setSyscallArg(tc, 0, gtoh(attrp->registers.a0));
         tc->setIntReg(27/*t12*/, gtoh(attrp->registers.pc));
         tc->setIntReg(TheISA::StackPointerReg, gtoh(attrp->registers.sp));
         tc->setMiscRegNoEffect(AlphaISA::MISCREG_UNIQ, uniq_val);
@@ -709,9 +710,10 @@ class Tru64 : public OperatingSystem
         using namespace std;
         using namespace TheISA;
 
-        TypedBufferArg<Tru64::nxm_thread_attr> attrp(tc->getSyscallArg(0));
-        TypedBufferArg<uint64_t> kidp(tc->getSyscallArg(1));
-        int thread_index = tc->getSyscallArg(2);
+        TypedBufferArg<Tru64::nxm_thread_attr>
+            attrp(process->getSyscallArg(tc, 0));
+        TypedBufferArg<uint64_t> kidp(process->getSyscallArg(tc, 1));
+        int thread_index = process->getSyscallArg(tc, 2);
 
         // get attribute args
         attrp.copyIn(tc->getMemPort());
@@ -792,7 +794,7 @@ class Tru64 : public OperatingSystem
             ThreadContext *tc = process->findFreeContext();
             if (tc) {
                 // inactive context... grab it
-                init_thread_context(tc, attrp, uniq_val);
+                init_thread_context(process, tc, attrp, uniq_val);
 
                 // This is supposed to be a port number, but we'll try
                 // and get away with just sticking the thread index
@@ -830,11 +832,11 @@ class Tru64 : public OperatingSystem
     {
         using namespace std;
 
-        uint64_t tid = tc->getSyscallArg(0);
-        uint64_t secs = tc->getSyscallArg(1);
-        uint64_t flags = tc->getSyscallArg(2);
-        uint64_t action = tc->getSyscallArg(3);
-        uint64_t usecs = tc->getSyscallArg(4);
+        uint64_t tid = process->getSyscallArg(tc, 0);
+        uint64_t secs = process->getSyscallArg(tc, 1);
+        uint64_t flags = process->getSyscallArg(tc, 2);
+        uint64_t action = process->getSyscallArg(tc, 3);
+        uint64_t usecs = process->getSyscallArg(tc, 4);
 
         cout << tc->getCpuPtr()->name() << ": nxm_thread_block " << tid << " "
              << secs << " " << flags << " " << action << " " << usecs << endl;
@@ -849,11 +851,11 @@ class Tru64 : public OperatingSystem
     {
         using namespace std;
 
-        Addr uaddr = tc->getSyscallArg(0);
-        uint64_t val = tc->getSyscallArg(1);
-        uint64_t secs = tc->getSyscallArg(2);
-        uint64_t usecs = tc->getSyscallArg(3);
-        uint64_t flags = tc->getSyscallArg(4);
+        Addr uaddr = process->getSyscallArg(tc, 0);
+        uint64_t val = process->getSyscallArg(tc, 1);
+        uint64_t secs = process->getSyscallArg(tc, 2);
+        uint64_t usecs = process->getSyscallArg(tc, 3);
+        uint64_t flags = process->getSyscallArg(tc, 4);
 
         BaseCPU *cpu = tc->getCpuPtr();
 
@@ -872,7 +874,7 @@ class Tru64 : public OperatingSystem
     {
         using namespace std;
 
-        Addr uaddr = tc->getSyscallArg(0);
+        Addr uaddr = process->getSyscallArg(tc, 0);
 
         cout << tc->getCpuPtr()->name() << ": nxm_unblock "
              << hex << uaddr << dec << endl;
@@ -973,7 +975,7 @@ class Tru64 : public OperatingSystem
     m5_mutex_lockFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
                       ThreadContext *tc)
     {
-        Addr uaddr = tc->getSyscallArg(0);
+        Addr uaddr = process->getSyscallArg(tc, 0);
 
         m5_lock_mutex(uaddr, process, tc);
 
@@ -990,7 +992,7 @@ class Tru64 : public OperatingSystem
     {
         using namespace TheISA;
 
-        Addr uaddr = tc->getSyscallArg(0);
+        Addr uaddr = process->getSyscallArg(tc, 0);
         TypedBufferArg<uint64_t> lockp(uaddr);
 
         lockp.copyIn(tc->getMemPort());
@@ -1010,7 +1012,7 @@ class Tru64 : public OperatingSystem
     m5_mutex_unlockFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
                         ThreadContext *tc)
     {
-        Addr uaddr = tc->getSyscallArg(0);
+        Addr uaddr = process->getSyscallArg(tc, 0);
 
         m5_unlock_mutex(uaddr, process, tc);
 
@@ -1022,7 +1024,7 @@ class Tru64 : public OperatingSystem
     m5_cond_signalFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
                        ThreadContext *tc)
     {
-        Addr cond_addr = tc->getSyscallArg(0);
+        Addr cond_addr = process->getSyscallArg(tc, 0);
 
         // Wake up one process waiting on the condition variable.
         activate_waiting_context(cond_addr, process);
@@ -1035,7 +1037,7 @@ class Tru64 : public OperatingSystem
     m5_cond_broadcastFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
                           ThreadContext *tc)
     {
-        Addr cond_addr = tc->getSyscallArg(0);
+        Addr cond_addr = process->getSyscallArg(tc, 0);
 
         activate_waiting_context(cond_addr, process, true);
 
@@ -1049,8 +1051,8 @@ class Tru64 : public OperatingSystem
     {
         using namespace TheISA;
 
-        Addr cond_addr = tc->getSyscallArg(0);
-        Addr lock_addr = tc->getSyscallArg(1);
+        Addr cond_addr = process->getSyscallArg(tc, 0);
+        Addr lock_addr = process->getSyscallArg(tc, 1);
         TypedBufferArg<uint64_t> condp(cond_addr);
         TypedBufferArg<uint64_t> lockp(lock_addr);
 
@@ -1082,10 +1084,10 @@ class Tru64 : public OperatingSystem
     indirectSyscallFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
                         ThreadContext *tc)
     {
-        int new_callnum = tc->getSyscallArg(0);
+        int new_callnum = process->getSyscallArg(tc, 0);
 
         for (int i = 0; i < 5; ++i)
-            tc->setSyscallArg(i, tc->getSyscallArg(i+1));
+            process->setSyscallArg(tc, i, process->getSyscallArg(tc, i+1));
 
 
         SyscallDesc *new_desc = process->getDesc(new_callnum);
diff --git a/src/kern/tru64/tru64_events.cc b/src/kern/tru64/tru64_events.cc
index 9534c31de..4867df559 100644
--- a/src/kern/tru64/tru64_events.cc
+++ b/src/kern/tru64/tru64_events.cc
@@ -51,7 +51,7 @@ BadAddrEvent::process(ThreadContext *tc)
     // annotation for vmunix::badaddr in:
     // simos/simulation/apps/tcl/osf/tlaser.tcl
 
-    uint64_t a0 = tc->readIntReg(ArgumentReg[0]);
+    uint64_t a0 = tc->readIntReg(16);
 
     AddrRangeList resp;
     bool snoop;
diff --git a/src/sim/process.cc b/src/sim/process.cc
index 51c0573ba..4be97f2f6 100644
--- a/src/sim/process.cc
+++ b/src/sim/process.cc
@@ -616,12 +616,10 @@ LiveProcess::argsInit(int intSize, int pageSize)
     copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
     copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
 
-    assert(NumArgumentRegs >= 2);
-
     ThreadContext *tc = system->getThreadContext(contextIds[0]);
 
-    tc->setIntReg(ArgumentReg[0], argc);
-    tc->setIntReg(ArgumentReg[1], argv_array_base);
+    setSyscallArg(tc, 0, argc);
+    setSyscallArg(tc, 1, argv_array_base);
     tc->setIntReg(StackPointerReg, stack_min);
 
     Addr prog_entry = objFile->entryPoint();
diff --git a/src/sim/process.hh b/src/sim/process.hh
index e6b7c80b7..790adcb87 100644
--- a/src/sim/process.hh
+++ b/src/sim/process.hh
@@ -44,9 +44,11 @@
 #include <string>
 #include <vector>
 
+#include "arch/types.hh"
 #include "base/statistics.hh"
 #include "sim/host.hh"
 #include "sim/sim_object.hh"
+#include "sim/syscallreturn.hh"
 
 class GDBListener;
 class PageTable;
@@ -321,6 +323,11 @@ class LiveProcess : public Process
     std::string getcwd() const { return cwd; }
 
     virtual void syscall(int64_t callnum, ThreadContext *tc);
+    virtual TheISA::IntReg getSyscallArg(ThreadContext *tc, int i) = 0;
+    virtual void setSyscallArg(ThreadContext *tc,
+            int i, TheISA::IntReg val) = 0;
+    virtual void setSyscallReturn(ThreadContext *tc,
+            SyscallReturn return_value) = 0;
 
     virtual SyscallDesc* getDesc(int callnum) = 0;
 
diff --git a/src/sim/syscall_emul.cc b/src/sim/syscall_emul.cc
index fb6af0b0c..5fe30c269 100644
--- a/src/sim/syscall_emul.cc
+++ b/src/sim/syscall_emul.cc
@@ -53,8 +53,8 @@ SyscallDesc::doSyscall(int callnum, LiveProcess *process, ThreadContext *tc)
 {
     DPRINTFR(SyscallVerbose, "%d: %s: syscall %s called w/arguments %d,%d,%d,%d\n",
              curTick,tc->getCpuPtr()->name(), name,
-             tc->getSyscallArg(0),tc->getSyscallArg(1),
-             tc->getSyscallArg(2),tc->getSyscallArg(3));
+             process->getSyscallArg(tc, 0), process->getSyscallArg(tc, 1),
+             process->getSyscallArg(tc, 2), process->getSyscallArg(tc, 3));
 
     SyscallReturn retval = (*funcPtr)(this, callnum, process, tc);
 
@@ -62,7 +62,7 @@ SyscallDesc::doSyscall(int callnum, LiveProcess *process, ThreadContext *tc)
              curTick,tc->getCpuPtr()->name(), name, retval.value());
 
     if (!(flags & SyscallDesc::SuppressReturnValue))
-        tc->setSyscallReturn(retval);
+        process->setSyscallReturn(tc, retval);
 }
 
 
@@ -81,7 +81,7 @@ ignoreFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
            ThreadContext *tc)
 {
     warn("ignoring syscall %s(%d, %d, ...)", desc->name,
-         tc->getSyscallArg(0), tc->getSyscallArg(1));
+         process->getSyscallArg(tc, 0), process->getSyscallArg(tc, 1));
 
     return 0;
 }
@@ -92,7 +92,8 @@ exitFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
          ThreadContext *tc)
 {
     if (tc->exit()) {
-        exitSimLoop("target called exit()", tc->getSyscallArg(0) & 0xff);
+        exitSimLoop("target called exit()",
+                process->getSyscallArg(tc, 0) & 0xff);
     }
 
     return 1;
@@ -110,7 +111,7 @@ SyscallReturn
 brkFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 {
     // change brk addr to first arg
-    Addr new_brk = tc->getSyscallArg(0);
+    Addr new_brk = p->getSyscallArg(tc, 0);
 
     // in Linux at least, brk(0) returns the current break value
     // (note that the syscall and the glibc function have different behavior)
@@ -136,7 +137,7 @@ brkFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 SyscallReturn
 closeFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 {
-    int target_fd = tc->getSyscallArg(0);
+    int target_fd = p->getSyscallArg(tc, 0);
     int status = close(p->sim_fd(target_fd));
     if (status >= 0)
         p->free_fd(target_fd);
@@ -147,9 +148,9 @@ closeFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 SyscallReturn
 readFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 {
-    int fd = p->sim_fd(tc->getSyscallArg(0));
-    int nbytes = tc->getSyscallArg(2);
-    BufferArg bufArg(tc->getSyscallArg(1), nbytes);
+    int fd = p->sim_fd(p->getSyscallArg(tc, 0));
+    int nbytes = p->getSyscallArg(tc, 2);
+    BufferArg bufArg(p->getSyscallArg(tc, 1), nbytes);
 
     int bytes_read = read(fd, bufArg.bufferPtr(), nbytes);
 
@@ -162,9 +163,9 @@ readFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 SyscallReturn
 writeFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 {
-    int fd = p->sim_fd(tc->getSyscallArg(0));
-    int nbytes = tc->getSyscallArg(2);
-    BufferArg bufArg(tc->getSyscallArg(1), nbytes);
+    int fd = p->sim_fd(p->getSyscallArg(tc, 0));
+    int nbytes = p->getSyscallArg(tc, 2);
+    BufferArg bufArg(p->getSyscallArg(tc, 1), nbytes);
 
     bufArg.copyIn(tc->getMemPort());
 
@@ -179,9 +180,9 @@ writeFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 SyscallReturn
 lseekFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 {
-    int fd = p->sim_fd(tc->getSyscallArg(0));
-    uint64_t offs = tc->getSyscallArg(1);
-    int whence = tc->getSyscallArg(2);
+    int fd = p->sim_fd(p->getSyscallArg(tc, 0));
+    uint64_t offs = p->getSyscallArg(tc, 1);
+    int whence = p->getSyscallArg(tc, 2);
 
     off_t result = lseek(fd, offs, whence);
 
@@ -192,11 +193,11 @@ lseekFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 SyscallReturn
 _llseekFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 {
-    int fd = p->sim_fd(tc->getSyscallArg(0));
-    uint64_t offset_high = tc->getSyscallArg(1);
-    uint32_t offset_low = tc->getSyscallArg(2);
-    Addr result_ptr = tc->getSyscallArg(3);
-    int whence = tc->getSyscallArg(4);
+    int fd = p->sim_fd(p->getSyscallArg(tc, 0));
+    uint64_t offset_high = p->getSyscallArg(tc, 1);
+    uint32_t offset_low = p->getSyscallArg(tc, 2);
+    Addr result_ptr = p->getSyscallArg(tc, 3);
+    int whence = p->getSyscallArg(tc, 4);
 
     uint64_t offset = (offset_high << 32) | offset_low;
 
@@ -235,8 +236,8 @@ const char *hostname = "m5.eecs.umich.edu";
 SyscallReturn
 gethostnameFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 {
-    int name_len = tc->getSyscallArg(1);
-    BufferArg name(tc->getSyscallArg(0), name_len);
+    int name_len = p->getSyscallArg(tc, 1);
+    BufferArg name(p->getSyscallArg(tc, 0), name_len);
 
     strncpy((char *)name.bufferPtr(), hostname, name_len);
 
@@ -249,8 +250,8 @@ SyscallReturn
 getcwdFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 {
     int result = 0;
-    unsigned long size = tc->getSyscallArg(1);
-    BufferArg buf(tc->getSyscallArg(0), size);
+    unsigned long size = p->getSyscallArg(tc, 1);
+    BufferArg buf(p->getSyscallArg(tc, 0), size);
 
     // Is current working directory defined?
     string cwd = p->getcwd();
@@ -282,14 +283,14 @@ readlinkFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 {
     string path;
 
-    if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
+    if (!tc->getMemPort()->tryReadString(path, p->getSyscallArg(tc, 0)))
         return (TheISA::IntReg)-EFAULT;
 
     // Adjust path for current working directory
     path = p->fullPath(path);
 
-    size_t bufsiz = tc->getSyscallArg(2);
-    BufferArg buf(tc->getSyscallArg(1), bufsiz);
+    size_t bufsiz = p->getSyscallArg(tc, 2);
+    BufferArg buf(p->getSyscallArg(tc, 1), bufsiz);
 
     int result = readlink(path.c_str(), (char *)buf.bufferPtr(), bufsiz);
 
@@ -303,7 +304,7 @@ unlinkFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 {
     string path;
 
-    if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
+    if (!tc->getMemPort()->tryReadString(path, p->getSyscallArg(tc, 0)))
         return (TheISA::IntReg)-EFAULT;
 
     // Adjust path for current working directory
@@ -319,13 +320,13 @@ mkdirFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 {
     string path;
 
-    if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
+    if (!tc->getMemPort()->tryReadString(path, p->getSyscallArg(tc, 0)))
         return (TheISA::IntReg)-EFAULT;
 
     // Adjust path for current working directory
     path = p->fullPath(path);
 
-    mode_t mode = tc->getSyscallArg(1);
+    mode_t mode = p->getSyscallArg(tc, 1);
 
     int result = mkdir(path.c_str(), mode);
     return (result == -1) ? -errno : result;
@@ -336,12 +337,12 @@ renameFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 {
     string old_name;
 
-    if (!tc->getMemPort()->tryReadString(old_name, tc->getSyscallArg(0)))
+    if (!tc->getMemPort()->tryReadString(old_name, p->getSyscallArg(tc, 0)))
         return -EFAULT;
 
     string new_name;
 
-    if (!tc->getMemPort()->tryReadString(new_name, tc->getSyscallArg(1)))
+    if (!tc->getMemPort()->tryReadString(new_name, p->getSyscallArg(tc, 1)))
         return -EFAULT;
 
     // Adjust path for current working directory
@@ -357,10 +358,10 @@ truncateFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 {
     string path;
 
-    if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
+    if (!tc->getMemPort()->tryReadString(path, p->getSyscallArg(tc, 0)))
         return -EFAULT;
 
-    off_t length = tc->getSyscallArg(1);
+    off_t length = p->getSyscallArg(tc, 1);
 
     // Adjust path for current working directory
     path = p->fullPath(path);
@@ -372,12 +373,12 @@ truncateFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 SyscallReturn
 ftruncateFunc(SyscallDesc *desc, int num, LiveProcess *process, ThreadContext *tc)
 {
-    int fd = process->sim_fd(tc->getSyscallArg(0));
+    int fd = process->sim_fd(process->getSyscallArg(tc, 0));
 
     if (fd < 0)
         return -EBADF;
 
-    off_t length = tc->getSyscallArg(1);
+    off_t length = process->getSyscallArg(tc, 1);
 
     int result = ftruncate(fd, length);
     return (result == -1) ? -errno : result;
@@ -399,13 +400,13 @@ chownFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 {
     string path;
 
-    if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
+    if (!tc->getMemPort()->tryReadString(path, p->getSyscallArg(tc, 0)))
         return -EFAULT;
 
     /* XXX endianess */
-    uint32_t owner = tc->getSyscallArg(1);
+    uint32_t owner = p->getSyscallArg(tc, 1);
     uid_t hostOwner = owner;
-    uint32_t group = tc->getSyscallArg(2);
+    uint32_t group = p->getSyscallArg(tc, 2);
     gid_t hostGroup = group;
 
     // Adjust path for current working directory
@@ -418,15 +419,15 @@ chownFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 SyscallReturn
 fchownFunc(SyscallDesc *desc, int num, LiveProcess *process, ThreadContext *tc)
 {
-    int fd = process->sim_fd(tc->getSyscallArg(0));
+    int fd = process->sim_fd(process->getSyscallArg(tc, 0));
 
     if (fd < 0)
         return -EBADF;
 
     /* XXX endianess */
-    uint32_t owner = tc->getSyscallArg(1);
+    uint32_t owner = process->getSyscallArg(tc, 1);
     uid_t hostOwner = owner;
-    uint32_t group = tc->getSyscallArg(2);
+    uint32_t group = process->getSyscallArg(tc, 2);
     gid_t hostGroup = group;
 
     int result = fchown(fd, hostOwner, hostGroup);
@@ -437,11 +438,11 @@ fchownFunc(SyscallDesc *desc, int num, LiveProcess *process, ThreadContext *tc)
 SyscallReturn
 dupFunc(SyscallDesc *desc, int num, LiveProcess *process, ThreadContext *tc)
 {
-    int fd = process->sim_fd(tc->getSyscallArg(0));
+    int fd = process->sim_fd(process->getSyscallArg(tc, 0));
     if (fd < 0)
         return -EBADF;
 
-    Process::FdMap *fdo = process->sim_fd_obj(tc->getSyscallArg(0));
+    Process::FdMap *fdo = process->sim_fd_obj(process->getSyscallArg(tc, 0));
 
     int result = dup(fd);
     return (result == -1) ? -errno : process->alloc_fd(result, fdo->filename, fdo->flags, fdo->mode, false);
@@ -452,12 +453,12 @@ SyscallReturn
 fcntlFunc(SyscallDesc *desc, int num, LiveProcess *process,
           ThreadContext *tc)
 {
-    int fd = tc->getSyscallArg(0);
+    int fd = process->getSyscallArg(tc, 0);
 
     if (fd < 0 || process->sim_fd(fd) < 0)
         return -EBADF;
 
-    int cmd = tc->getSyscallArg(1);
+    int cmd = process->getSyscallArg(tc, 1);
     switch (cmd) {
       case 0: // F_DUPFD
         // if we really wanted to support this, we'd need to do it
@@ -494,12 +495,12 @@ SyscallReturn
 fcntl64Func(SyscallDesc *desc, int num, LiveProcess *process,
             ThreadContext *tc)
 {
-    int fd = tc->getSyscallArg(0);
+    int fd = process->getSyscallArg(tc, 0);
 
     if (fd < 0 || process->sim_fd(fd) < 0)
         return -EBADF;
 
-    int cmd = tc->getSyscallArg(1);
+    int cmd = process->getSyscallArg(tc, 1);
     switch (cmd) {
       case 33: //F_GETLK64
         warn("fcntl64(%d, F_GETLK64) not supported, error returned\n", fd);
@@ -583,7 +584,7 @@ setuidFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
            ThreadContext *tc)
 {
     // can't fathom why a benchmark would call this.
-    warn("Ignoring call to setuid(%d)\n", tc->getSyscallArg(0));
+    warn("Ignoring call to setuid(%d)\n", process->getSyscallArg(tc, 0));
     return 0;
 }
 
diff --git a/src/sim/syscall_emul.hh b/src/sim/syscall_emul.hh
index 0e34a835e..0b0e73692 100644
--- a/src/sim/syscall_emul.hh
+++ b/src/sim/syscall_emul.hh
@@ -467,8 +467,8 @@ SyscallReturn
 ioctlFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
           ThreadContext *tc)
 {
-    int fd = tc->getSyscallArg(0);
-    unsigned req = tc->getSyscallArg(1);
+    int fd = process->getSyscallArg(tc, 0);
+    unsigned req = process->getSyscallArg(tc, 1);
 
     DPRINTF(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", fd, req);
 
@@ -502,7 +502,7 @@ openFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
 {
     std::string path;
 
-    if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
+    if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
         return -EFAULT;
 
     if (path == "/dev/sysdev0") {
@@ -512,8 +512,8 @@ openFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
         return -ENOENT;
     }
 
-    int tgtFlags = tc->getSyscallArg(1);
-    int mode = tc->getSyscallArg(2);
+    int tgtFlags = process->getSyscallArg(tc, 1);
+    int mode = process->getSyscallArg(tc, 2);
     int hostFlags = 0;
 
     // translate open flags
@@ -560,10 +560,10 @@ chmodFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
 {
     std::string path;
 
-    if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
+    if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
         return -EFAULT;
 
-    uint32_t mode = tc->getSyscallArg(1);
+    uint32_t mode = process->getSyscallArg(tc, 1);
     mode_t hostMode = 0;
 
     // XXX translate mode flags via OS::something???
@@ -587,13 +587,13 @@ SyscallReturn
 fchmodFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
            ThreadContext *tc)
 {
-    int fd = tc->getSyscallArg(0);
+    int fd = process->getSyscallArg(tc, 0);
     if (fd < 0 || process->sim_fd(fd) < 0) {
         // doesn't map to any simulator fd: not a valid target fd
         return -EBADF;
     }
 
-    uint32_t mode = tc->getSyscallArg(1);
+    uint32_t mode = process->getSyscallArg(tc, 1);
     mode_t hostMode = 0;
 
     // XXX translate mode flags via OS::someting???
@@ -612,10 +612,10 @@ template <class OS>
 SyscallReturn
 mremapFunc(SyscallDesc *desc, int callnum, LiveProcess *process, ThreadContext *tc)
 {
-    Addr start = tc->getSyscallArg(0);
-    uint64_t old_length = tc->getSyscallArg(1);
-    uint64_t new_length = tc->getSyscallArg(2);
-    uint64_t flags = tc->getSyscallArg(3);
+    Addr start = process->getSyscallArg(tc, 0);
+    uint64_t old_length = process->getSyscallArg(tc, 1);
+    uint64_t new_length = process->getSyscallArg(tc, 2);
+    uint64_t flags = process->getSyscallArg(tc, 3);
 
     if ((start % TheISA::VMPageSize != 0) ||
             (new_length % TheISA::VMPageSize != 0)) {
@@ -661,7 +661,7 @@ statFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
 {
     std::string path;
 
-    if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
+    if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
     return -EFAULT;
 
     // Adjust path for current working directory
@@ -673,7 +673,8 @@ statFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
     if (result < 0)
         return -errno;
 
-    copyOutStatBuf<OS>(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
+    copyOutStatBuf<OS>(tc->getMemPort(), process->getSyscallArg(tc, 1),
+            &hostBuf);
 
     return 0;
 }
@@ -687,7 +688,7 @@ stat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
 {
     std::string path;
 
-    if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
+    if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
         return -EFAULT;
 
     // Adjust path for current working directory
@@ -704,7 +705,8 @@ stat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
     if (result < 0)
         return -errno;
 
-    copyOutStat64Buf<OS>(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
+    copyOutStat64Buf<OS>(tc->getMemPort(), process->getSyscallArg(tc, 1),
+            &hostBuf);
 
     return 0;
 }
@@ -716,7 +718,7 @@ SyscallReturn
 fstat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
             ThreadContext *tc)
 {
-    int fd = tc->getSyscallArg(0);
+    int fd = process->getSyscallArg(tc, 0);
     if (fd < 0 || process->sim_fd(fd) < 0) {
         // doesn't map to any simulator fd: not a valid target fd
         return -EBADF;
@@ -733,7 +735,7 @@ fstat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
     if (result < 0)
         return -errno;
 
-    copyOutStat64Buf<OS>(tc->getMemPort(), tc->getSyscallArg(1),
+    copyOutStat64Buf<OS>(tc->getMemPort(), process->getSyscallArg(tc, 1),
         &hostBuf, (fd == 1));
 
     return 0;
@@ -748,7 +750,7 @@ lstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
 {
     std::string path;
 
-    if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
+    if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
       return -EFAULT;
 
     // Adjust path for current working directory
@@ -760,7 +762,8 @@ lstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
     if (result < 0)
         return -errno;
 
-    copyOutStatBuf<OS>(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
+    copyOutStatBuf<OS>(tc->getMemPort(), process->getSyscallArg(tc, 1),
+            &hostBuf);
 
     return 0;
 }
@@ -773,7 +776,7 @@ lstat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
 {
     std::string path;
 
-    if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
+    if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
       return -EFAULT;
 
     // Adjust path for current working directory
@@ -790,7 +793,8 @@ lstat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
     if (result < 0)
         return -errno;
 
-    copyOutStat64Buf<OS>(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
+    copyOutStat64Buf<OS>(tc->getMemPort(), process->getSyscallArg(tc, 1),
+            &hostBuf);
 
     return 0;
 }
@@ -801,7 +805,7 @@ SyscallReturn
 fstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
           ThreadContext *tc)
 {
-    int fd = process->sim_fd(tc->getSyscallArg(0));
+    int fd = process->sim_fd(process->getSyscallArg(tc, 0));
 
     DPRINTF(SyscallVerbose, "fstat(%d, ...)\n", fd);
 
@@ -814,7 +818,7 @@ fstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
     if (result < 0)
         return -errno;
 
-    copyOutStatBuf<OS>(tc->getMemPort(), tc->getSyscallArg(1),
+    copyOutStatBuf<OS>(tc->getMemPort(), process->getSyscallArg(tc, 1),
         &hostBuf, (fd == 1));
 
     return 0;
@@ -829,7 +833,7 @@ statfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
 {
     std::string path;
 
-    if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
+    if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
       return -EFAULT;
 
     // Adjust path for current working directory
@@ -842,7 +846,7 @@ statfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
         return -errno;
 
     OS::copyOutStatfsBuf(tc->getMemPort(),
-            (Addr)(tc->getSyscallArg(1)), &hostBuf);
+            (Addr)(process->getSyscallArg(tc, 1)), &hostBuf);
 
     return 0;
 }
@@ -854,7 +858,7 @@ SyscallReturn
 fstatfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
             ThreadContext *tc)
 {
-    int fd = process->sim_fd(tc->getSyscallArg(0));
+    int fd = process->sim_fd(process->getSyscallArg(tc, 0));
 
     if (fd < 0)
         return -EBADF;
@@ -865,7 +869,7 @@ fstatfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
     if (result < 0)
         return -errno;
 
-    OS::copyOutStatfsBuf(tc->getMemPort(), tc->getSyscallArg(1),
+    OS::copyOutStatfsBuf(tc->getMemPort(), process->getSyscallArg(tc, 1),
         &hostBuf);
 
     return 0;
@@ -878,15 +882,15 @@ SyscallReturn
 writevFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
            ThreadContext *tc)
 {
-    int fd = tc->getSyscallArg(0);
+    int fd = process->getSyscallArg(tc, 0);
     if (fd < 0 || process->sim_fd(fd) < 0) {
         // doesn't map to any simulator fd: not a valid target fd
         return -EBADF;
     }
 
     TranslatingPort *p = tc->getMemPort();
-    uint64_t tiov_base = tc->getSyscallArg(1);
-    size_t count = tc->getSyscallArg(2);
+    uint64_t tiov_base = process->getSyscallArg(tc, 1);
+    size_t count = process->getSyscallArg(tc, 2);
     struct iovec hiov[count];
     for (int i = 0; i < count; ++i)
     {
@@ -930,12 +934,12 @@ template <class OS>
 SyscallReturn
 mmapFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 {
-    Addr start = tc->getSyscallArg(0);
-    uint64_t length = tc->getSyscallArg(1);
-    // int prot = tc->getSyscallArg(2);
-    int flags = tc->getSyscallArg(3);
-    // int fd = p->sim_fd(tc->getSyscallArg(4));
-    // int offset = tc->getSyscallArg(5);
+    Addr start = p->getSyscallArg(tc, 0);
+    uint64_t length = p->getSyscallArg(tc, 1);
+    // int prot = p->getSyscallArg(tc, 2);
+    int flags = p->getSyscallArg(tc, 3);
+    // int fd = p->sim_fd(p->getSyscallArg(tc, 4));
+    // int offset = p->getSyscallArg(tc, 5);
 
 
     if ((start  % TheISA::VMPageSize) != 0 ||
@@ -958,7 +962,7 @@ mmapFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 
     if (!(flags & OS::TGT_MAP_ANONYMOUS)) {
         warn("allowing mmap of file @ fd %d. "
-             "This will break if not /dev/zero.", tc->getSyscallArg(4));
+             "This will break if not /dev/zero.", p->getSyscallArg(tc, 4));
     }
 
     return start;
@@ -970,8 +974,8 @@ SyscallReturn
 getrlimitFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
         ThreadContext *tc)
 {
-    unsigned resource = tc->getSyscallArg(0);
-    TypedBufferArg<typename OS::rlimit> rlp(tc->getSyscallArg(1));
+    unsigned resource = process->getSyscallArg(tc, 0);
+    TypedBufferArg<typename OS::rlimit> rlp(process->getSyscallArg(tc, 1));
 
     switch (resource) {
         case OS::TGT_RLIMIT_STACK:
@@ -1005,7 +1009,7 @@ SyscallReturn
 gettimeofdayFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
         ThreadContext *tc)
 {
-    TypedBufferArg<typename OS::timeval> tp(tc->getSyscallArg(0));
+    TypedBufferArg<typename OS::timeval> tp(process->getSyscallArg(tc, 0));
 
     getElapsedTime(tp->tv_sec, tp->tv_usec);
     tp->tv_sec += seconds_since_epoch;
@@ -1026,10 +1030,10 @@ utimesFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
 {
     std::string path;
 
-    if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
+    if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
       return -EFAULT;
 
-    TypedBufferArg<typename OS::timeval [2]> tp(tc->getSyscallArg(1));
+    TypedBufferArg<typename OS::timeval [2]> tp(process->getSyscallArg(tc, 1));
     tp.copyIn(tc->getMemPort());
 
     struct timeval hostTimeval[2];
@@ -1055,8 +1059,8 @@ SyscallReturn
 getrusageFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
               ThreadContext *tc)
 {
-    int who = tc->getSyscallArg(0);     // THREAD, SELF, or CHILDREN
-    TypedBufferArg<typename OS::rusage> rup(tc->getSyscallArg(1));
+    int who = process->getSyscallArg(tc, 0);     // THREAD, SELF, or CHILDREN
+    TypedBufferArg<typename OS::rusage> rup(process->getSyscallArg(tc, 1));
 
     rup->ru_utime.tv_sec = 0;
     rup->ru_utime.tv_usec = 0;