Fix build on alpine arm64 (#102953)

Author: am11

src/coreclr/pgosupport.cmake

@@ -24,9 +24,6 @@ function(add_pgo TargetName)
             if(UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELEASE OR UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELWITHDEBINFO)
                 target_compile_options(${TargetName} PRIVATE -flto -fprofile-instr-generate)
                 set_property(TARGET ${TargetName} APPEND_STRING PROPERTY LINK_FLAGS " -flto -fprofile-instr-generate")
-                if(NOT LD_LLVM)
-                    set_property(TARGET ${TargetName} APPEND_STRING PROPERTY LINK_FLAGS " -fuse-ld=gold")
-                endif()
             endif(UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELEASE OR UPPERCASE_CMAKE_BUILD_TYPE STREQUAL RELWITHDEBINFO)
         endif(CLR_CMAKE_HOST_WIN32)
     elseif(CLR_CMAKE_PGO_OPTIMIZE AND NOT CLR_CMAKE_ENABLE_SANITIZERS)
@@ -59,9 +56,6 @@ function(add_pgo TargetName)
                         if(HAVE_LTO)
                             target_compile_options(${TargetName} PRIVATE -flto -fprofile-instr-use=${ProfilePath} -Wno-profile-instr-out-of-date -Wno-profile-instr-unprofiled)
                             set_property(TARGET ${TargetName} APPEND_STRING PROPERTY LINK_FLAGS " -flto -fprofile-instr-use=${ProfilePath}")
-                            if(NOT LD_LLVM)
-                                set_property(TARGET ${TargetName} APPEND_STRING PROPERTY LINK_FLAGS " -fuse-ld=gold")
-                            endif()
                             add_compile_definitions(WITH_NATIVE_PGO)
                         else(HAVE_LTO)
                             message(WARNING "LTO is not supported, skipping profile guided optimizations")

src/coreclr/vm/arm64/cgencpu.h

@@ -304,7 +304,7 @@ inline TADDR GetMem(PCODE address, SIZE_T size, bool signExtend)
     }
     EX_CATCH
     {
-        mem = NULL;
+        mem = 0;
         _ASSERTE(!"Memory read within jitted Code Failed, this should not happen!!!!");
     }
     EX_END_CATCH(SwallowAllExceptions);

src/coreclr/vm/arm64/stubs.cpp

@@ -295,7 +295,7 @@ void LazyMachState::unwindLazyState(LazyMachState* baseState,
     context.X27 = unwoundstate->captureX19_X29[8] = baseState->captureX19_X29[8];
     context.X28 = unwoundstate->captureX19_X29[9] = baseState->captureX19_X29[9];
     context.Fp  = unwoundstate->captureX19_X29[10] = baseState->captureX19_X29[10];
-    context.Lr = NULL; // Filled by the unwinder
+    context.Lr = 0; // Filled by the unwinder
 
     context.Sp = baseState->captureSp;
     context.Pc = baseState->captureIp;
@@ -316,7 +316,7 @@ void LazyMachState::unwindLazyState(LazyMachState* baseState,
     nonVolContextPtrs.X27 = &unwoundstate->captureX19_X29[8];
     nonVolContextPtrs.X28 = &unwoundstate->captureX19_X29[9];
     nonVolContextPtrs.Fp  = &unwoundstate->captureX19_X29[10];
-    nonVolContextPtrs.Lr = NULL; // Filled by the unwinder
+    nonVolContextPtrs.Lr = 0; // Filled by the unwinder
 
 #endif // DACCESS_COMPILE
 
@@ -464,7 +464,7 @@ void HelperMethodFrame::UpdateRegDisplay(const PREGDISPLAY pRD, bool updateFloat
         pRD->pCurrentContext->X27 = (DWORD64)(pUnwoundState->captureX19_X29[8]);
         pRD->pCurrentContext->X28 = (DWORD64)(pUnwoundState->captureX19_X29[9]);
         pRD->pCurrentContext->Fp = (DWORD64)(pUnwoundState->captureX19_X29[10]);
-        pRD->pCurrentContext->Lr = NULL; // Unwind again to get Caller's PC
+        pRD->pCurrentContext->Lr = 0; // Unwind again to get Caller's PC
 
         pRD->pCurrentContextPointers->X19 = &pRD->pCurrentContext->X19;
         pRD->pCurrentContextPointers->X20 = &pRD->pCurrentContext->X20;
@@ -503,7 +503,7 @@ void HelperMethodFrame::UpdateRegDisplay(const PREGDISPLAY pRD, bool updateFloat
     pRD->pCurrentContext->X27 = (DWORD64)(m_MachState.unwoundX19_X29[8]);
     pRD->pCurrentContext->X28 = (DWORD64)(m_MachState.unwoundX19_X29[9]);
     pRD->pCurrentContext->Fp = (DWORD64)(m_MachState.unwoundX19_X29[10]);
-    pRD->pCurrentContext->Lr = NULL; // Unwind again to get Caller's PC
+    pRD->pCurrentContext->Lr = 0; // Unwind again to get Caller's PC
 #else // __APPLE__
     pRD->pCurrentContext->X19 = *m_MachState.ptrX19_X29[0];
     pRD->pCurrentContext->X20 = *m_MachState.ptrX19_X29[1];
@@ -516,7 +516,7 @@ void HelperMethodFrame::UpdateRegDisplay(const PREGDISPLAY pRD, bool updateFloat
     pRD->pCurrentContext->X27 = *m_MachState.ptrX19_X29[8];
     pRD->pCurrentContext->X28 = *m_MachState.ptrX19_X29[9];
     pRD->pCurrentContext->Fp  = *m_MachState.ptrX19_X29[10];
-    pRD->pCurrentContext->Lr = NULL; // Unwind again to get Caller's PC
+    pRD->pCurrentContext->Lr = 0; // Unwind again to get Caller's PC
 #endif // __APPLE__
 
 #if !defined(DACCESS_COMPILE)
@@ -531,7 +531,7 @@ void HelperMethodFrame::UpdateRegDisplay(const PREGDISPLAY pRD, bool updateFloat
     pRD->pCurrentContextPointers->X27 = m_MachState.ptrX19_X29[8];
     pRD->pCurrentContextPointers->X28 = m_MachState.ptrX19_X29[9];
     pRD->pCurrentContextPointers->Fp = m_MachState.ptrX19_X29[10];
-    pRD->pCurrentContextPointers->Lr = NULL; // Unwind again to get Caller's PC
+    pRD->pCurrentContextPointers->Lr = 0; // Unwind again to get Caller's PC
 #endif
 
     ClearRegDisplayArgumentAndScratchRegisters(pRD);