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diff -up firefox-60.0/mfbt/LinuxSignal.h.mozilla-1238661 firefox-60.0/mfbt/LinuxSignal.h
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--- firefox-60.0/mfbt/LinuxSignal.h.mozilla-1238661	2018-04-27 08:55:38.848241768 +0200
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+++ firefox-60.0/mfbt/LinuxSignal.h	2018-04-27 09:06:47.946769859 +0200
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@@ -22,7 +22,7 @@ __attribute__((naked)) void SignalTrampo
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                                              void* aContext) {
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   asm volatile("nop; nop; nop; nop" : : : "memory");
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-  asm volatile("b %0" : : "X"(H) : "memory");
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+  asm volatile("bx %0" : : "r"(H), "l"(aSignal), "l"(aInfo), "l"(aContext) : "memory");
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 }
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 #  define MOZ_SIGNAL_TRAMPOLINE(h) (mozilla::SignalTrampoline<h>)