Implement JIT on Windows 64 bits

https://bugs.webkit.org/show_bug.cgi?id=107965

Reviewed by Simon Hausmann.

Source/JavaScriptCore:

1. MSVC doesn't support inline assembly for 64 bits, implements the trampoline in a separate ASM file.

2. Windows 64 bits has a different calling convention than other OSes following the AMD64 ABI.
Differences that we have to handle here:
- Registers passed parameters are RCX, RDX, R8 and R9 instead of RDI, RSI, RDX, RCX, R8 and R9
- RDI and RSI must be preserved by callee
- Only return values <= 8 bytes can be returned by register (RDX can't be used to return a second word)
- There is no red-zone after RIP on the stack, but instead 4 reserved words before it

* Target.pri:
* jit/JITStubs.cpp:
* jit/JITStubs.h:
(JSC):
(JITStackFrame):
(JSC::JITStackFrame::returnAddressSlot):
* jit/JITStubsMSVC64.asm: Added.
* jit/JSInterfaceJIT.h:
(JSInterfaceJIT):
* jit/ThunkGenerators.cpp:
(JSC::nativeForGenerator):
* yarr/YarrJIT.cpp:
(YarrGenerator):
(JSC::Yarr::YarrGenerator::generateEnter):
(JSC::Yarr::YarrGenerator::generateReturn):

Source/WTF:

* wtf/Platform.h:

Change-Id: Ie1910350e36defcd427a95ceb9aa280fa61083e7
git-svn-id: http://svn.webkit.org/repository/webkit/trunk@144043 268f45cc-cd09-0410-ab3c-d52691b4dbfc
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>

1 files changed, 29 insertions, 1 deletions

diff --git a/Source/JavaScriptCore/jit/JITStubs.h b/Source/JavaScriptCore/jit/JITStubs.h
index 3bf13bbdf..fe64cd9bc 100644
--- a/Source/JavaScriptCore/jit/JITStubs.h
+++ b/Source/JavaScriptCore/jit/JITStubs.h
@@ -99,7 +99,7 @@ namespace JSC {
         MacroAssemblerCodePtr ctiNativeConstruct;
     };
 
-#if CPU(X86_64)
+#if !OS(WINDOWS) && CPU(X86_64)
     struct JITStackFrame {
         void* reserved; // Unused
         JITStubArg args[6];
@@ -123,6 +123,34 @@ namespace JSC {
         // When JIT code makes a call, it pushes its return address just below the rest of the stack.
         ReturnAddressPtr* returnAddressSlot() { return reinterpret_cast<ReturnAddressPtr*>(this) - 1; }
     };
+#elif OS(WINDOWS) && CPU(X86_64)
+    struct JITStackFrame {
+        void* shadow[4]; // Shadow space reserved for a callee's parameters home addresses
+        void* reserved; // Unused, also maintains the 16-bytes stack alignment
+        JITStubArg args[6];
+
+        void* savedRBX;
+        void* savedR15;
+        void* savedR14;
+        void* savedR13;
+        void* savedR12;
+        void* savedRBP;
+        void* savedRIP;
+
+        // Home addresses for our register passed parameters
+        // http://msdn.microsoft.com/en-us/library/ew5tede7.aspx
+        void* code;
+        JSStack* stack;
+        CallFrame* callFrame;
+        void* unused1;
+
+        // Passed on the stack
+        void* unused2;
+        JSGlobalData* globalData;
+
+        // When JIT code makes a call, it pushes its return address just below the rest of the stack.
+        ReturnAddressPtr* returnAddressSlot() { return reinterpret_cast<ReturnAddressPtr*>(this) - 1; }
+    };
 #elif CPU(X86)
 #if COMPILER(MSVC) || (OS(WINDOWS) && COMPILER(GCC))
 #pragma pack(push)