scripting/wamr_patches/0029-windows-aot-chkstk.patch

--- a/core/iwasm/aot/arch/aot_reloc_x86_64.c
+++ b/core/iwasm/aot/arch/aot_reloc_x86_64.c
@@ -29,11 +29,19 @@
 #pragma function(ceil)
 #pragma function(floorf)
 #pragma function(ceilf)
+
+/* LLVM probes frames past a page through it, since Windows commits thread
+   stacks one guard page at a time. */
+void
+__chkstk(void);
 #endif
 
 /* clang-format off */
 static SymbolMap target_sym_map[] = {
     REG_COMMON_SYMBOLS
+#if defined(BH_PLATFORM_WINDOWS)
+    REG_SYM(__chkstk),
+#endif
 };
 /* clang-format on */
 
@@ -61,7 +69,11 @@
 get_plt_item_size(void)
 {
     /* size of mov instruction and jmp instruction */
+#if defined(BH_PLATFORM_WINDOWS)
+    return 13;
+#else
     return 12;
+#endif
 }
 
 uint32
@@ -80,6 +92,19 @@
 
     for (i = 0; i < num; i++) {
         p = plt;
+#if defined(BH_PLATFORM_WINDOWS)
+        /* __chkstk takes its size in rax, so jump through r11, which the
+           Windows ABI leaves free across calls. */
+        /* mov symbol_addr, r11 */
+        *p++ = 0x49;
+        *p++ = 0xBB;
+        *(uint64 *)p = (uint64)(uintptr_t)target_sym_map[i].symbol_addr;
+        p += sizeof(uint64);
+        /* jmp r11 */
+        *p++ = 0x41;
+        *p++ = 0xFF;
+        *p++ = 0xE3;
+#else
         /* mov symbol_addr, rax */
         *p++ = 0x48;
         *p++ = 0xB8;
@@ -88,6 +113,7 @@
         /* jmp rax */
         *p++ = 0xFF;
         *p++ = 0xE0;
+#endif
         plt += get_plt_item_size();
     }
 }