From 98b90e73944dd9f2fb04cf2efec7a2e94351ef80 Mon Sep 17 00:00:00 2001
From: Justin Miller <justinmiller100@gmail.com>
Date: Thu, 27 Oct 2022 08:14:10 -0700
Subject: [PATCH] [DBGHELP] Add ARM64 definitions into compat.h (#4810)

This fixes ARM64 build in preparation for PR #4809.
CORE-18200
---
 dll/win32/dbghelp/compat.h | 143 ++++++++++++++++++++++++++++++++++++-
 1 file changed, 142 insertions(+), 1 deletion(-)

diff --git a/dll/win32/dbghelp/compat.h b/dll/win32/dbghelp/compat.h
index f7bef66bc91..02e693f62a5 100644
--- a/dll/win32/dbghelp/compat.h
+++ b/dll/win32/dbghelp/compat.h
@@ -450,7 +450,7 @@ typedef struct _CONTEXT {
     DWORD64 LastExceptionFromRip;
 } CONTEXT;
 
-#elif defined TARGET_arm /* ARM? */
+#elif defined TARGET_arm
 
 /* The following flags control the contents of the CONTEXT structure. */
 
@@ -549,6 +549,147 @@ typedef struct _CONTEXT {
 BOOLEAN CDECL            RtlAddFunctionTable(RUNTIME_FUNCTION*,DWORD,DWORD);
 BOOLEAN CDECL            RtlDeleteFunctionTable(RUNTIME_FUNCTION*);
 PRUNTIME_FUNCTION WINAPI RtlLookupFunctionEntry(ULONG_PTR,DWORD*,UNWIND_HISTORY_TABLE*);
+
+#elif defined TARGET_arm64
+
+#define CONTEXT_ARM64   0x00400000L
+#define CONTEXT_CONTROL (CONTEXT_ARM64 | 0x1L)
+#define CONTEXT_INTEGER (CONTEXT_ARM64 | 0x2L)
+#define CONTEXT_FLOATING_POINT  (CONTEXT_ARM64 | 0x4L)
+#define CONTEXT_DEBUG_REGISTERS (CONTEXT_ARM64 | 0x8L)
+#define CONTEXT_X18 (CONTEXT_ARM64 | 0x10L)
+#define CONTEXT_FULL (CONTEXT_CONTROL | CONTEXT_INTEGER | CONTEXT_FLOATING_POINT)
+
+#define EXCEPTION_READ_FAULT    0
+#define EXCEPTION_WRITE_FAULT   1
+#define EXCEPTION_EXECUTE_FAULT 8
+
+typedef union NEON128 {
+    struct {
+        ULONGLONG Low;
+        LONGLONG High;
+    } DUMMYSTRUCTNAME;
+    double D[2];
+    float S[4];
+    WORD   H[8];
+    BYTE  B[16];
+} NEON128, *PNEON128;
+
+#define ARM64_MAX_BREAKPOINTS 8
+#define ARM64_MAX_WATCHPOINTS 2
+
+typedef struct _CONTEXT {
+
+    //
+    // Control flags.
+    //
+
+    DWORD ContextFlags;
+
+    //
+    // Integer registers
+    //
+
+    DWORD Cpsr;
+    union {
+        struct {
+            DWORD64 X0;
+            DWORD64 X1;
+            DWORD64 X2;
+            DWORD64 X3;
+            DWORD64 X4;
+            DWORD64 X5;
+            DWORD64 X6;
+            DWORD64 X7;
+            DWORD64 X8;
+            DWORD64 X9;
+            DWORD64 X10;
+            DWORD64 X11;
+            DWORD64 X12;
+            DWORD64 X13;
+            DWORD64 X14;
+            DWORD64 X15;
+            DWORD64 X16;
+            DWORD64 X17;
+            DWORD64 X18;
+            DWORD64 X19;
+            DWORD64 X20;
+            DWORD64 X21;
+            DWORD64 X22;
+            DWORD64 X23;
+            DWORD64 X24;
+            DWORD64 X25;
+            DWORD64 X26;
+            DWORD64 X27;
+            DWORD64 X28;
+            DWORD64 Fp;
+            DWORD64 Lr;
+        } DUMMYSTRUCTNAME;
+        DWORD64 X[31];
+    } DUMMYUNIONNAME;
+
+    DWORD64 Sp;
+    DWORD64 Pc;
+
+    //
+    // Floating Point/NEON Registers
+    //
+
+    NEON128 V[32];
+    DWORD Fpcr;
+    DWORD Fpsr;
+
+    //
+    // Debug registers
+    //
+
+    DWORD Bcr[ARM64_MAX_BREAKPOINTS];
+    DWORD64 Bvr[ARM64_MAX_BREAKPOINTS];
+    DWORD Wcr[ARM64_MAX_WATCHPOINTS];
+    DWORD64 Wvr[ARM64_MAX_WATCHPOINTS];
+
+} _CONTEXT, *P_CONTEXT;
+typedef _CONTEXT CONTEXT, *PCONTEXT;
+
+typedef struct _IMAGE_ARM64_RUNTIME_FUNCTION_ENTRY {
+    DWORD BeginAddress;
+    union {
+        DWORD UnwindData;
+        struct {
+            DWORD Flag : 2;
+            DWORD FunctionLength : 11;
+            DWORD RegF : 3;
+            DWORD RegI : 4;
+            DWORD H : 1;
+            DWORD CR : 2;
+            DWORD FrameSize : 9;
+        } DUMMYSTRUCTNAME;
+    } DUMMYUNIONNAME;
+} IMAGE_ARM64_RUNTIME_FUNCTION_ENTRY, * PIMAGE_ARM64_RUNTIME_FUNCTION_ENTRY;
+typedef struct _IMAGE_ARM64_RUNTIME_FUNCTION_ENTRY RUNTIME_FUNCTION, *PRUNTIME_FUNCTION;
+
+#define UNWIND_HISTORY_TABLE_SIZE 12
+
+typedef struct _UNWIND_HISTORY_TABLE_ENTRY {
+    ULONG_PTR ImageBase;
+    PRUNTIME_FUNCTION FunctionEntry;
+} UNWIND_HISTORY_TABLE_ENTRY, *PUNWIND_HISTORY_TABLE_ENTRY;
+
+typedef struct _UNWIND_HISTORY_TABLE {
+    DWORD Count;
+    BYTE  LocalHint;
+    BYTE  GlobalHint;
+    BYTE  Search;
+    BYTE  Once;
+    ULONG_PTR LowAddress;
+    ULONG_PTR HighAddress;
+    UNWIND_HISTORY_TABLE_ENTRY Entry[UNWIND_HISTORY_TABLE_SIZE];
+} UNWIND_HISTORY_TABLE, *PUNWIND_HISTORY_TABLE;
+
+BOOLEAN CDECL            RtlAddFunctionTable(RUNTIME_FUNCTION*,DWORD,DWORD);
+BOOLEAN CDECL            RtlDeleteFunctionTable(RUNTIME_FUNCTION*);
+PRUNTIME_FUNCTION WINAPI RtlLookupFunctionEntry(ULONG_PTR,DWORD*,UNWIND_HISTORY_TABLE*);
+
 #else
 
 #error "Unknown target platform"