Specify -z notext on linux-musl-x86 and riscv64 (#83682)

* Specify -z notext on linux-musl-x86

* Fix riscv64 build with clang/lld v15+

* Inline visibility attribute

* Fix gcc build

Author: am11

src/coreclr/CMakeLists.txt

@@ -109,7 +109,7 @@ if(CLR_CMAKE_HOST_UNIX)
         endif()
     endif()
 
-    if(CLR_CMAKE_TARGET_LINUX AND CLR_CMAKE_TARGET_ARCH_I386)
+    if(CLR_CMAKE_TARGET_LINUX AND (CLR_CMAKE_TARGET_ARCH_I386 OR CLR_CMAKE_TARGET_ARCH_RISCV64))
       add_linker_flag(-Wl,-z,notext)
     endif()
 

src/coreclr/vm/exceptionhandling.cpp

@@ -5857,7 +5857,7 @@ struct _Unwind_Exception;
 // This is a personality routine for TheUMEntryPrestub and UMThunkStub Unix asm stubs.
 // An exception propagating through these stubs is an unhandled exception.
 // This function dumps managed stack trace and terminates the current process.
-EXTERN_C _Unwind_Reason_Code
+EXTERN_C __attribute__((visibility("default"))) _Unwind_Reason_Code
 UnhandledExceptionHandlerUnix(
                 IN int version,
                 IN _Unwind_Action action,