.

src/win64/misc.rs

@@ -2,8 +2,9 @@
 pub unsafe extern "C" fn __chkstk() {
     core::arch::asm!(
     "push   %rcx",
+    "push   %rax",
     "cmp    $0x1000,%rax",
-    "lea    16(%rsp),%rcx", // rsp before calling this routine -> rcx
+    "lea    24(%rsp),%rcx",
     "jb     1f",
     "2:",
     "sub    $0x1000,%rcx",
@@ -14,11 +15,8 @@ pub unsafe extern "C" fn __chkstk() {
     "1:",
     "sub    %rax,%rcx",
     "test   %rcx,(%rcx)",
-    "lea    8(%rsp),%rax",  // load pointer to the return address into rax
-    "mov    %rcx,%rsp",     // install the new top of stack pointer into rsp
-    "mov    -8(%rax),%rcx", // restore rcx
-    "push   (%rax)",        // push return address onto the stack
-    "sub    %rsp,%rax",     // restore the original value in rax
+    "pop    %rax",
+    "pop    %rcx",
     "ret",
     options(noreturn, att_syntax)
     );