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

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();

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;
 

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;
 }
 

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;