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pyjion/helpers.asm

@@ -1,4 +1,5 @@
 .code
+PAGE_SIZE equ 1000h
 JIT_StackProbe PROC
 
         ; On entry:
@@ -11,11 +12,11 @@ JIT_StackProbe PROC
         ; NOTE: this helper will probe at least one page below the one pointed by rsp.
 
         mov     rax, rsp               ; rax points to some byte on the last probed page
-        and     rax, -1000h        ; rax points to the **lowest address** on the last probed page
+        and     rax, -PAGE_SIZE         ; rax points to the **lowest address** on the last probed page
                                        ; This is done to make the following loop end condition simpler.
 
 ProbeLoop:
-        sub     rax, 1000h         ; rax points to the lowest address of the **next page** to probe
+        sub     rax, PAGE_SIZE         ; rax points to the lowest address of the **next page** to probe
         test    dword ptr [rax], eax   ; rax points to the lowest address on the **last probed** page
         cmp     rax, r11
         jg      ProbeLoop              ; If (rax > r11), then we need to probe at least one more page.

pyjion/jitinfo.h

@@ -1561,6 +1561,7 @@ class CorJitInfo : public ICorJitInfo, public JittedCode {
         memset(pEEInfoOut, 0, sizeof(CORINFO_EE_INFO));
         pEEInfoOut->inlinedCallFrameInfo.size = 4;
 #ifdef WINDOWS
+        pEEInfoOut->osPageSize = 1000; // Set to the windows default
         pEEInfoOut->osType = CORINFO_WINNT;
 #else
         pEEInfoOut->osType = CORINFO_UNIX;