Fix build error in ARM64 code (dotnet/coreclr#8407)

CONTEXT struct for ARM64 does not contain X29 field.

Commit migrated from https://github.com/dotnet/coreclr/commit/6aa53dc3703b49dba774f3c1ea1e988a85e69274

diff --git a/src/coreclr/src/pal/src/include/pal/context.h b/src/coreclr/src/pal/src/include/pal/context.h
index 794fe32..92e2d6f 100644 (file)
--- a/src/coreclr/src/pal/src/include/pal/context.h
+++ b/src/coreclr/src/pal/src/include/pal/context.h
@@ -485,7 +485,7 @@ inline static DWORD64 CONTEXTGetFP(LPCONTEXT pContext)
 #elif defined(_ARM_)
     return pContext->R7;
 #elif defined(_ARM64_)
-    return pContext->X29;    
+    return pContext->Fp;
 #else
 #error don't know how to get the frame pointer for this architecture
 #endif