diff --git a/contrib/llvm-project/libunwind/include/__libunwind_config.h b/contrib/llvm-project/libunwind/include/__libunwind_config.h
index cbbbf741c233..7973768c3c8b 100644
--- a/contrib/llvm-project/libunwind/include/__libunwind_config.h
+++ b/contrib/llvm-project/libunwind/include/__libunwind_config.h
@@ -124,7 +124,7 @@
   #define _LIBUNWIND_TARGET_SPARC 1
   #define _LIBUNWIND_HIGHEST_DWARF_REGISTER _LIBUNWIND_HIGHEST_DWARF_REGISTER_SPARC
   #define _LIBUNWIND_CONTEXT_SIZE 16
-  #define _LIBUNWIND_CURSOR_SIZE 28
+  #define _LIBUNWIND_CURSOR_SIZE 23
 # else
 #  error "Unsupported architecture."
 # endif
diff --git a/contrib/llvm-project/libunwind/src/config.h b/contrib/llvm-project/libunwind/src/config.h
index 65a2fc208f31..dcd3cef94552 100644
--- a/contrib/llvm-project/libunwind/src/config.h
+++ b/contrib/llvm-project/libunwind/src/config.h
@@ -104,8 +104,7 @@
     (!defined(__APPLE__) && defined(__arm__)) ||                               \
     (defined(__arm64__) || defined(__aarch64__)) ||                            \
     defined(__mips__) ||                                                       \
-    defined(__riscv) ||                                                        \
-    defined(__sparc__)
+    defined(__riscv)
 #if !defined(_LIBUNWIND_BUILD_SJLJ_APIS)
 #define _LIBUNWIND_BUILD_ZERO_COST_APIS
 #endif