1 files changed, 13 insertions, 53 deletions

diff --git a/Source/JavaScriptCore/jit/JITStubsMSVC64.asm b/Source/JavaScriptCore/jit/JITStubsMSVC64.asm
index 054214153..ef9cd4e0e 100644
--- a/Source/JavaScriptCore/jit/JITStubsMSVC64.asm
+++ b/Source/JavaScriptCore/jit/JITStubsMSVC64.asm
@@ -1,5 +1,5 @@
 ;/*
-; Copyright (C) 2015 The Qt Company Ltd
+; Copyright (C) 2014 Apple Inc. All rights reserved.
 ;
 ; Redistribution and use in source and binary forms, with or without
 ; modification, are permitted provided that the following conditions
@@ -23,62 +23,22 @@
 ; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ;*/
 
-EXTERN cti_vm_throw : near
-PUBLIC ctiTrampoline
-PUBLIC ctiVMThrowTrampoline
-PUBLIC ctiOpThrowNotCaught
+EXTERN getHostCallReturnValueWithExecState : near
 
-_TEXT   SEGMENT
-
-ctiTrampoline PROC
-    ; Dump register parameters to their home address
-    mov qword ptr[rsp+20h], r9
-    mov qword ptr[rsp+18h], r8
-    mov qword ptr[rsp+10h], rdx
-    mov qword ptr[rsp+8h], rcx
-
-    push rbp
-    mov rbp, rsp
-    push r12
-    push r13
-    push r14
-    push r15
-    push rbx
+PUBLIC getHostCallReturnValue
 
-    ; Decrease rsp to point to the start of our JITStackFrame
-    sub rsp, 58h
-    mov r12, 512
-    mov r14, 0FFFF000000000000h
-    mov r15, 0FFFF000000000002h
-    mov r13, r8
-    call rcx
-    add rsp, 58h
-    pop rbx
-    pop r15
-    pop r14
-    pop r13
-    pop r12
-    pop rbp
-    ret
-ctiTrampoline ENDP
-
-ctiVMThrowTrampoline PROC
-    mov rcx, rsp
-    call cti_vm_throw
-    int 3
-ctiVMThrowTrampoline ENDP
+_TEXT   SEGMENT
 
-ctiOpThrowNotCaught PROC
-    add rsp, 58h
-    pop rbx
-    pop r15
-    pop r14
-    pop r13
-    pop r12
-    pop rbp
+getHostCallReturnValue PROC
+    lea rcx, [rsp - 8]
+    ; Allocate space for all 4 parameter registers, and align stack pointer to 16 bytes boundary by allocating another 8 bytes.
+    ; The stack alignment is needed to fix a crash in the CRT library on a floating point instruction.
+    sub rsp, 40
+    call getHostCallReturnValueWithExecState
+    add rsp, 40
     ret
-ctiOpThrowNotCaught ENDP
+getHostCallReturnValue ENDP
 
 _TEXT   ENDS
 
-END
\ No newline at end of file
+END