Revert "chore: update mksnapshot to work for windows cross compile"

This reverts commit ea40af62cf7c65ef8120366c43dbdcae71dd237d.

patches/v8/.patches

@@ -1,3 +1,2 @@
 chore_allow_customizing_microtask_policy_per_context.patch
 build_warn_instead_of_abort_on_builtin_pgo_profile_mismatch.patch
-chore_update_mksnapshot_to_work_for_windows_cross_compile.patch

patches/v8/chore_update_mksnapshot_to_work_for_windows_cross_compile.patch

@@ -1,178 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: John Kleinschmidt <kleinschmidtorama@gmail.com>
-Date: Fri, 20 Mar 2026 16:19:44 -0400
-Subject: chore: update mksnapshot to work for windows cross compile
-
-This patch makes mksnapshot work properly for windows cross compile
-
-diff --git a/src/diagnostics/unwinding-info-win64.cc b/src/diagnostics/unwinding-info-win64.cc
-index 1312609e5b648fdca187373c374126282c7afa77..e14984b4cd0d423043c94d2f723c64de65b9fdc5 100644
---- a/src/diagnostics/unwinding-info-win64.cc
-+++ b/src/diagnostics/unwinding-info-win64.cc
-@@ -40,12 +40,14 @@ bool RegisterUnwindInfoForExceptionHandlingOnly() {
- #endif
- }
- 
-+#if defined(V8_OS_WIN64)
- v8::UnhandledExceptionCallback unhandled_exception_callback_g = nullptr;
- 
- void SetUnhandledExceptionCallback(
-     v8::UnhandledExceptionCallback unhandled_exception_callback) {
-   unhandled_exception_callback_g = unhandled_exception_callback;
- }
-+#endif  // V8_OS_WIN64
- 
- // This function is registered as exception handler for V8-generated code as
- // part of the registration of unwinding info. It is referenced by
-diff --git a/src/diagnostics/unwinding-info-win64.h b/src/diagnostics/unwinding-info-win64.h
-index bb32f49e5d8966bafc079d274ad9600f75f85759..b0a58acc5d78932dc0e83bef1ad04b71868669f3 100644
---- a/src/diagnostics/unwinding-info-win64.h
-+++ b/src/diagnostics/unwinding-info-win64.h
-@@ -11,8 +11,11 @@
- #include "include/v8config.h"
- #include "src/common/globals.h"
- 
-+#if defined(V8_OS_WIN64) || \
-+    (defined(V8_TARGET_OS_WIN) && defined(V8_TARGET_ARCH_X64))
- #if defined(V8_OS_WIN64)
- #include "src/base/win32-headers.h"
-+#endif
- 
- namespace v8 {
- namespace internal {
-@@ -45,8 +48,10 @@ bool CanRegisterUnwindInfoForNonABICompliantCodeRange();
- /**
-  * Registers a custom exception handler for exceptions in V8-generated code.
-  */
-+#if defined(V8_OS_WIN64)
- void SetUnhandledExceptionCallback(
-     v8::UnhandledExceptionCallback unhandled_exception_callback);
-+#endif  // V8_OS_WIN64
- 
- void RegisterNonABICompliantCodeRange(void* start, size_t size_in_bytes);
- void UnregisterNonABICompliantCodeRange(void* start);
-@@ -61,7 +66,8 @@ void UnregisterNonABICompliantCodeRange(void* start);
-  */
- static const uint32_t kDefaultRuntimeFunctionCount = 1;
- 
--#if defined(V8_OS_WIN_X64)
-+#if defined(V8_OS_WIN_X64) || \
-+    (defined(V8_TARGET_OS_WIN) && defined(V8_TARGET_ARCH_X64))
- 
- static const int kPushRbpInstructionLength = 1;
- static const int kMovRbpRspInstructionLength = 3;
-@@ -182,6 +188,6 @@ class XdataEncoder {
- }  // namespace internal
- }  // namespace v8
- 
--#endif  // V8_OS_WIN64
-+#endif  // V8_OS_WIN64 || (V8_TARGET_OS_WIN && V8_TARGET_ARCH_X64)
- 
- #endif  // V8_DIAGNOSTICS_UNWINDING_INFO_WIN64_H_
-diff --git a/src/snapshot/embedded/platform-embedded-file-writer-win.cc b/src/snapshot/embedded/platform-embedded-file-writer-win.cc
-index bf76435717cf63f6f7be288c9b7e963c14b29425..69a6c4e6e186485cf41a991107bc1f9b6b1794c8 100644
---- a/src/snapshot/embedded/platform-embedded-file-writer-win.cc
-+++ b/src/snapshot/embedded/platform-embedded-file-writer-win.cc
-@@ -8,13 +8,81 @@
- 
- #include "src/common/globals.h"  // For V8_OS_WIN64
- 
--#if defined(V8_OS_WIN64)
-+#if defined(V8_OS_WIN64) || \
-+    (defined(V8_TARGET_OS_WIN) && defined(V8_TARGET_ARCH_X64))
- #include "src/builtins/builtins.h"
- #include "src/diagnostics/unwinding-info-win64.h"
- #include "src/snapshot/embedded/embedded-data-inl.h"
- #include "src/snapshot/embedded/embedded-file-writer.h"
- #endif  // V8_OS_WIN64
- 
-+// When cross-compiling for Windows on a non-Windows host, the implementations
-+// of CanEmitUnwindInfoForBuiltins() and GetUnwindInfoForBuiltinFunctions()
-+// from unwinding-info-win64.cc are not available (that file only compiles on
-+// Windows). Provide host-compatible implementations here for mksnapshot.
-+#if !defined(V8_OS_WIN64) && defined(V8_TARGET_OS_WIN) && \
-+    defined(V8_TARGET_ARCH_X64)
-+#include "src/flags/flags.h"
-+namespace v8 {
-+namespace internal {
-+namespace win64_unwindinfo {
-+
-+bool CanEmitUnwindInfoForBuiltins() { return v8_flags.win64_unwinding_info; }
-+
-+std::vector<uint8_t> GetUnwindInfoForBuiltinFunctions() {
-+  // Reproduce the V8UnwindData struct from unwinding-info-win64.cc using
-+  // platform-independent types. The layout matches the Windows UNWIND_INFO
-+  // and UNWIND_CODE structures (packed).
-+  static constexpr int kRbpCode = 5;  // x64 rbp register code
-+  static constexpr uint8_t kUNW_FLAG_EHANDLER = 0x01;
-+  static constexpr int kOpPushNonvol = 0;
-+  static constexpr int kOpSetFPReg = 3;
-+
-+#pragma pack(push, 1)
-+  struct UNWIND_CODE {
-+    uint8_t CodeOffset;
-+    uint8_t UnwindOpAndOpInfo;  // UnwindOp:4, OpInfo:4
-+  };
-+
-+  struct UNWIND_INFO {
-+    uint8_t VersionAndFlags;  // Version:3, Flags:5
-+    uint8_t SizeOfProlog;
-+    uint8_t CountOfCodes;
-+    uint8_t FrameRegisterAndOffset;  // FrameRegister:4, FrameOffset:4
-+  };
-+
-+  struct V8UnwindData {
-+    UNWIND_INFO unwind_info;
-+    UNWIND_CODE unwind_codes[kRbpPrefixCodes];
-+  };
-+#pragma pack(pop)
-+
-+  V8UnwindData xdata;
-+  xdata.unwind_info.VersionAndFlags =
-+      1 | (kUNW_FLAG_EHANDLER << 3);  // Version=1, Flags=UNW_FLAG_EHANDLER
-+  xdata.unwind_info.SizeOfProlog = kRbpPrefixLength;
-+  xdata.unwind_info.CountOfCodes = kRbpPrefixCodes;
-+  xdata.unwind_info.FrameRegisterAndOffset =
-+      kRbpCode;  // FrameRegister=rbp, FrameOffset=0
-+
-+  xdata.unwind_codes[0].CodeOffset = kRbpPrefixLength;  // movq rbp, rsp
-+  xdata.unwind_codes[0].UnwindOpAndOpInfo = kOpSetFPReg;  // OpInfo=0
-+
-+  xdata.unwind_codes[1].CodeOffset =
-+      kPushRbpInstructionLength;  // push rbp
-+  xdata.unwind_codes[1].UnwindOpAndOpInfo =
-+      kOpPushNonvol | (kRbpCode << 4);  // OpInfo=rbp
-+
-+  return std::vector<uint8_t>(reinterpret_cast<uint8_t*>(&xdata),
-+                              reinterpret_cast<uint8_t*>(&xdata) +
-+                                  sizeof(xdata));
-+}
-+
-+}  // namespace win64_unwindinfo
-+}  // namespace internal
-+}  // namespace v8
-+#endif  // !V8_OS_WIN64 && V8_TARGET_OS_WIN && V8_TARGET_ARCH_X64
-+
- // V8_CC_MSVC is true for both MSVC and clang on windows. clang can handle
- // __asm__-style inline assembly but MSVC cannot, and thus we need a more
- // precise compiler detection that can distinguish between the two. clang on
-@@ -59,7 +127,8 @@ namespace internal {
- 
- namespace {
- 
--#if defined(V8_OS_WIN_X64)
-+#if defined(V8_OS_WIN_X64) || \
-+    (defined(V8_TARGET_OS_WIN) && defined(V8_TARGET_ARCH_X64))
- 
- void WriteUnwindInfoEntry(PlatformEmbeddedFileWriterWin* w,
-                           const char* unwind_info_symbol,
-@@ -324,7 +393,8 @@ void PlatformEmbeddedFileWriterWin::MaybeEmitUnwindData(
-   }
- #endif  // V8_OS_WIN_ARM64
- 
--#if defined(V8_OS_WIN64)
-+#if defined(V8_OS_WIN64) || \
-+    (defined(V8_TARGET_OS_WIN) && defined(V8_TARGET_ARCH_X64))
-   if (win64_unwindinfo::CanEmitUnwindInfoForBuiltins()) {
-     EmitUnwindData(this, unwind_info_symbol, embedded_blob_data_symbol, blob,
-                    reinterpret_cast<const win64_unwindinfo::BuiltinUnwindInfo*>(