ntdll: Check for AT_HWCAP2 definition before using it.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=54210

ntdll: Check for AT_HWCAP2 definition before using it.
95fe8e5d · Zebediah Figura · Alexandre Julliard · 90d975ac · 95fe8e5d
Commit 95fe8e5d authored Jan 11, 2023 by Zebediah Figura Committed by Alexandre Julliard Jan 12, 2023
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signal_x86_64.c dlls/ntdll/unix/signal_x86_64.c +2 -0

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--- a/dlls/ntdll/unix/signal_x86_64.c
+++ b/dlls/ntdll/unix/signal_x86_64.c
@@ -2429,7 +2429,9 @@ void signal_init_process(void)
        {
            amd64_thread_data()->fs = fs32_sel = (sel << 3) | 3;
            syscall_flags |= SYSCALL_HAVE_PTHREAD_TEB;
+#ifdef AT_HWCAP2
            if (getauxval( AT_HWCAP2 ) & 2) syscall_flags |= SYSCALL_HAVE_WRFSGSBASE;
+#endif
        }
        else ERR_(seh)( "failed to allocate %%fs selector\n" );
    }