Changed all syscalls to use syscall return object.

arch/alpha/alpha_linux_process.cc:
arch/alpha/alpha_tru64_process.cc:
cpu/exec_context.hh:
sim/process.hh:
sim/syscall_emul.cc:
sim/syscall_emul.hh:
    Changed all syscalls to use syscall return object
arch/alpha/isa_traits.hh:
    Added syscall return object that packages return value and return
    status into an object.
sim/process.cc:
    renamed variable name to nm so base class function name() can be called

--HG--
extra : convert_revision : 6609c5ffecc9e3519d7a0cd160879fd21d54abfc

1 files changed, 37 insertions, 0 deletions

diff --git a/arch/alpha/isa_traits.hh b/arch/alpha/isa_traits.hh
index 8db8c6994..3208b0cb3 100644
--- a/arch/alpha/isa_traits.hh
+++ b/arch/alpha/isa_traits.hh
@@ -286,6 +286,43 @@ const int ArgumentReg1 = TheISA::ArgumentReg1;
 const int BranchPredAddrShiftAmt = TheISA::BranchPredAddrShiftAmt;
 const int MaxAddr = (Addr)-1;
 
+#ifndef FULL_SYSTEM
+class SyscallReturn {
+        public:
+           template <class T>
+           SyscallReturn(T v, bool s)
+           {
+               retval = (uint64_t)v;
+               success = s;
+           }
+
+           template <class T>
+           SyscallReturn(T v)
+           {
+               success = (v >= 0);
+               retval = (uint64_t)v;
+           }
+
+           ~SyscallReturn() {}
+
+           SyscallReturn& operator=(const SyscallReturn& s) {
+               retval = s.retval;
+               success = s.success;
+               return *this;
+           }
+
+           uint64_t successful() { return success; }
+           bool value() { return retval; }
+
+
+       private:
+           uint64_t retval;
+           bool success;
+};
+
+#endif
+
+
 #ifdef FULL_SYSTEM
 typedef TheISA::InternalProcReg InternalProcReg;
 const int NumInternalProcRegs  = TheISA::NumInternalProcRegs;