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* m4/c-stack.m4 (AC_SYS_XSI_STACK_OVERFLOW_HEURISTIC): Check whether sigaltstack uses wrong end of stack_t (copied in part from libsigsegv). * lib/c-stack.c (c_stack_action) [!HAVE_LIBSIGSEGV]: Work around Irix bug, without requiring an over-allocation. * doc/posix-functions/sigaltstack.texi (sigaltstack): Document the bug. Signed-off-by: Eric Blake <ebb9@byu.net>
27 lines
626 B
Plaintext
27 lines
626 B
Plaintext
@node sigaltstack
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@section @code{sigaltstack}
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@findex sigaltstack
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POSIX specification: @url{http://www.opengroup.org/susv3xsh/sigaltstack.html}
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Gnulib module: ---
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Portability problems fixed by Gnulib:
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@itemize
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@end itemize
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Portability problems not fixed by Gnulib:
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@itemize
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@item
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This function is missing on some platforms:
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Cygwin, mingw, Interix 3.5, BeOS.
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@item
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@code{sigaltstack} doesn't work on HP-UX 11/IA-64 and OpenBSD
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3.6/Sparc64.
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@item
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This function interprets the @code{ss_sp} member of @code{stack_t} as
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the upper bound instead of the lower bound of the alternate stack on
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some platforms:
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Irix 6.5
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@end itemize
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