Implement JIT for MinGW-w64 64-bit

https://bugs.webkit.org/show_bug.cgi?id=114580

Reviewed by Jocelyn Turcotte.

* jit/JITStubs.cpp:
(JSC):

Change-Id: Ibdda0a09ba3db010bbd7858b745834dff2d92260
git-svn-id: http://svn.webkit.org/repository/webkit/trunk@148663 268f45cc-cd09-0410-ab3c-d52691b4dbfc
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>

1 files changed, 70 insertions, 1 deletions

diff --git a/Source/JavaScriptCore/jit/JITStubs.cpp b/Source/JavaScriptCore/jit/JITStubs.cpp
index eca0fb079..64acfeef5 100644
--- a/Source/JavaScriptCore/jit/JITStubs.cpp
+++ b/Source/JavaScriptCore/jit/JITStubs.cpp
@@ -364,7 +364,7 @@ SYMBOL_STRING(ctiOpThrowNotCaught) ":" "\n"
 
 #else // USE(JSVALUE32_64)
 
-#if COMPILER(GCC) && CPU(X86_64)
+#if COMPILER(GCC) && CPU(X86_64) && !OS(WINDOWS)
 
 // These ASSERTs remind you that, if you change the layout of JITStackFrame, you
 // need to change the assembly trampolines below to match.
@@ -433,6 +433,75 @@ SYMBOL_STRING(ctiOpThrowNotCaught) ":" "\n"
     "ret" "\n"
 );
 
+#elif COMPILER(GCC) && CPU(X86_64) && OS(WINDOWS)
+
+// These ASSERTs remind you that, if you change the layout of JITStackFrame, you
+// need to change the assembly trampolines below to match.
+COMPILE_ASSERT(offsetof(struct JITStackFrame, code) % 16 == 0x0, JITStackFrame_maintains_16byte_stack_alignment);
+COMPILE_ASSERT(offsetof(struct JITStackFrame, savedRBX) == 0x58, JITStackFrame_stub_argument_space_matches_ctiTrampoline);
+
+asm (
+".text\n"
+".globl " SYMBOL_STRING(ctiTrampoline) "\n"
+HIDE_SYMBOL(ctiTrampoline) "\n"
+SYMBOL_STRING(ctiTrampoline) ":" "\n"
+    // Dump register parameters to their home address
+    "movq %r9, 0x20(%rsp)" "\n"
+    "movq %r8, 0x18(%rsp)" "\n"
+    "movq %rdx, 0x10(%rsp)" "\n"
+    "movq %rcx, 0x8(%rsp)" "\n"
+
+    "pushq %rbp" "\n"
+    "movq %rsp, %rbp" "\n"
+    "pushq %r12" "\n"
+    "pushq %r13" "\n"
+    "pushq %r14" "\n"
+    "pushq %r15" "\n"
+    "pushq %rbx" "\n"
+
+    // Decrease rsp to point to the start of our JITStackFrame
+    "subq $0x58, %rsp" "\n"
+    "movq $512, %r12" "\n"
+    "movq $0xFFFF000000000000, %r14" "\n"
+    "movq $0xFFFF000000000002, %r15" "\n"
+    "movq %r8, %r13" "\n"
+    "call *%rcx" "\n"
+    "addq $0x58, %rsp" "\n"
+    "popq %rbx" "\n"
+    "popq %r15" "\n"
+    "popq %r14" "\n"
+    "popq %r13" "\n"
+    "popq %r12" "\n"
+    "popq %rbp" "\n"
+    "ret" "\n"
+".globl " SYMBOL_STRING(ctiTrampolineEnd) "\n"
+HIDE_SYMBOL(ctiTrampolineEnd) "\n"
+SYMBOL_STRING(ctiTrampolineEnd) ":" "\n"
+);
+
+asm (
+".globl " SYMBOL_STRING(ctiVMThrowTrampoline) "\n"
+HIDE_SYMBOL(ctiVMThrowTrampoline) "\n"
+SYMBOL_STRING(ctiVMThrowTrampoline) ":" "\n"
+    "movq %rsp, %rcx" "\n"
+    "call " LOCAL_REFERENCE(cti_vm_throw) "\n"
+    "int3" "\n"
+);
+
+asm (
+".globl " SYMBOL_STRING(ctiOpThrowNotCaught) "\n"
+HIDE_SYMBOL(ctiOpThrowNotCaught) "\n"
+SYMBOL_STRING(ctiOpThrowNotCaught) ":" "\n"
+    "addq $0x58, %rsp" "\n"
+    "popq %rbx" "\n"
+    "popq %r15" "\n"
+    "popq %r14" "\n"
+    "popq %r13" "\n"
+    "popq %r12" "\n"
+    "popq %rbp" "\n"
+    "ret" "\n"
+);
+
 #elif COMPILER(MSVC) && CPU(X86_64)
 
 // These ASSERTs remind you that, if you change the layout of JITStackFrame, you