From d0264201dd42d7735c41338f78c6065b2f9593bc Mon Sep 17 00:00:00 2001
From: Christian Kamm <christian.d.kamm@nokia.com>
Date: Fri, 12 Mar 2010 14:22:24 +0100
Subject: Initial implementation.

---
 src/backend/initializestack_64_linux_mac.cpp | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 src/backend/initializestack_64_linux_mac.cpp

(limited to 'src/backend/initializestack_64_linux_mac.cpp')

diff --git a/src/backend/initializestack_64_linux_mac.cpp b/src/backend/initializestack_64_linux_mac.cpp
new file mode 100644
index 0000000..5465dfb
--- /dev/null
+++ b/src/backend/initializestack_64_linux_mac.cpp
@@ -0,0 +1,22 @@
+#include <stdlib.h>
+
+void initializeStack(void *data, int size, void (*entry)(), void **stackPointer)
+{
+    void* stackBottom = (char*)data + size;
+    // align to 16 byte
+    stackBottom = (void*)((size_t)stackBottom & ~0xF);
+    
+    void **p = (void**)stackBottom;
+
+    *(--p) = 0; // align
+    *(--p) = (void*)entry; // rip
+    *(--p) = stackBottom; // rbp
+    *(--p) = 0; // rbx
+    *(--p) = 0; // r12
+    *(--p) = 0; // r13
+    *(--p) = 0; // r14
+    *(--p) = 0; // r15
+    *(--p) = (void*)0x00001f800000033f; // SIMD and regular floating point control defaults
+    
+    *stackPointer = p;
+}
-- 
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