Make trap instructions always generate TrapInstruction Fault objects which call into the Process object to handle system calls. Refactored the Process objects, and move the handler code into it's own file, and add some syscalls which are used in a natively compiled hello world. Software traps with trap number 3 (not syscall number 3) are supposed to cause the register windows to be flushed but are ignored right now. Finally, made uname for SPARC report a 2.6.12 kernel which is what m22-018.pool happens to be running.

--HG--
extra : convert_revision : ea873f01c62234c0542f310cc143c6a7c76ade94

1 files changed, 20 insertions, 0 deletions

diff --git a/src/arch/sparc/faults.cc b/src/arch/sparc/faults.cc
index a6f4343ae..391dd7134 100644
--- a/src/arch/sparc/faults.cc
+++ b/src/arch/sparc/faults.cc
@@ -656,6 +656,26 @@ void FillNNormal::invoke(ThreadContext *tc)
     tc->setNextNPC(fillStart + 2*sizeof(MachInst));
 }
 
+void TrapInstruction::invoke(ThreadContext *tc)
+{
+    //In SE, this mechanism is how the process requests a service from the
+    //operating system. We'll get the process object from the thread context
+    //and let it service the request.
+
+    Process *p = tc->getProcessPtr();
+
+    SparcLiveProcess *lp = dynamic_cast<SparcLiveProcess *>(p);
+    assert(lp);
+
+    lp->handleTrap(_n, tc);
+
+    //We need to explicitly advance the pc, since that's not done for us
+    //on a faulting instruction
+    tc->setPC(tc->readNextPC());
+    tc->setNextPC(tc->readNextNPC());
+    tc->setNextNPC(tc->readNextNPC() + sizeof(MachInst));
+}
+
 void PageTableFault::invoke(ThreadContext *tc)
 {
     Process *p = tc->getProcessPtr();