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@@ -95,6 +95,19 @@ END(__setcontext)
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weak_alias (__setcontext, setcontext)
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+/* We add an NOP here to separate between __setcontext/__startcontext. The
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+ wanted behavior that happens is: when unwinding from a function called
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+ inside a makecontext() context, FDE lookup will use '&__startcontext - 1',
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+ then returns NULL for no FDE found, and immediately ends the unwind, in
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+ a normal fashion.
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+
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+ If this NOP word does not exist, FDE lookup just repeatedly finds
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+ __setcontext's FDE in an infinite loop, due to the convention of using
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+ 'address - 1' for FDE lookup. Modifiying/deleting the below
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+ __startcontext's FDE has no help on this. */
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+
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+ nop
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+
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/* This is the helper code which gets called if a function which is
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registered with 'makecontext' returns. In this case we have to
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install the context listed in the uc_link element of the context
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Waldemar Brodkorb