Cherry-pick 274796@main (be51d07). https://bugs.webkit.org/show_bug.c…

…gi?id=269534

    [JSC] Use offlineasm globl to ensure that all entries have alt_entry
    https://bugs.webkit.org/show_bug.cgi?id=269534
    rdar://122525586

    Reviewed by Justin Michaud.

    We found that vmEntryToCSSJIT and vmEntryToCSSJITAfter are not having alt_entry properly since it is not using offlineasm globl.
    This allowed LLInt code shuffled by linkers when alt_entry is used, which breaks many assumptions. This patch fixes it.

    * Source/JavaScriptCore/llint/LowLevelInterpreter.asm:

    Canonical link: https://commits.webkit.org/274796@main

Source/JavaScriptCore/llint/LowLevelInterpreter.asm

@@ -1741,15 +1741,17 @@ _vmEntryHostFunction:
 
 # unsigned vmEntryToCSSJIT(uintptr_t, uintptr_t, uintptr_t, const void* codePtr);
 if ARM64E
-emit ".globl _vmEntryToCSSJIT"
-emit "_vmEntryToCSSJIT:"
+    global _vmEntryToCSSJITAfter
+end
+global _vmEntryToCSSJIT
+_vmEntryToCSSJIT:
     functionPrologue()
     jmp t3, CSSSelectorPtrTag
-    emit ".globl _vmEntryToCSSJITAfter"
-    emit "_vmEntryToCSSJITAfter:"
+if ARM64E
+    _vmEntryToCSSJITAfter:
+end
     functionEpilogue()
     ret
-end
 
 if not (C_LOOP or C_LOOP_WIN)
     # void sanitizeStackForVMImpl(VM* vm)