X86: Start implementing segmentation support.

Make instructions observe segment prefixes, default segment rules, segment
base addresses.
Also fix some microcode and add sib and riprel "keywords" to the x86
specialization of the microassembler.

--HG--
extra : convert_revision : be5a3b33d33f243ed6e1ad63faea8495e46d0ac9

1 files changed, 3 insertions, 7 deletions

diff --git a/src/arch/x86/process.cc b/src/arch/x86/process.cc
index 3cb027d41..364050994 100644
--- a/src/arch/x86/process.cc
+++ b/src/arch/x86/process.cc
@@ -88,6 +88,7 @@
 
 #include "arch/x86/isa_traits.hh"
 #include "arch/x86/process.hh"
+#include "arch/x86/segmentregs.hh"
 #include "arch/x86/types.hh"
 #include "base/loader/object_file.hh"
 #include "base/loader/elf_object.hh"
@@ -145,13 +146,8 @@ void
 X86LiveProcess::startup()
 {
     argsInit(sizeof(IntReg), VMPageSize);
-
-    //The AMD64 abi says that only rsp and rdx are defined at process
-    //startup. rsp will be set by argsInit, and I don't understand what
-    //rdx should be set to. The other floating point and integer registers
-    //will be zeroed by the register file constructors, but control registers
-    //should be initialized here. Since none of those are implemented, there
-    //isn't anything here.
+    for(int i = 0; i < NUM_SEGMENTREGS; i++)
+        threadContexts[0]->setMiscRegNoEffect(MISCREG_ES_BASE + i, 0);
 }
 
 void