mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-11-30 10:37:37 +01:00
69 lines
2.1 KiB
TeX
69 lines
2.1 KiB
TeX
\documentclass{article}
|
|
\usepackage[fancyhdr,pdf]{latex2man}
|
|
|
|
\input{common.tex}
|
|
|
|
\begin{document}
|
|
|
|
\begin{Name}{3}{unw\_is\_signal\_frame}{David Mosberger-Tang}{Programming Library}{unw\_is\_signal\_frame}unw\_is\_signal\_frame -- check if current frame is a signal frame
|
|
\end{Name}
|
|
|
|
\section{Synopsis}
|
|
|
|
\File{\#include $<$libunwind.h$>$}\\
|
|
|
|
\Type{int} \Func{unw\_is\_signal\_frame}(\Type{unw\_cursor\_t~*}\Var{cp});\\
|
|
|
|
\section{Description}
|
|
|
|
The \Func{unw\_is\_signal\_frame}() routine returns a positive value
|
|
if the current frame identified by \Var{cp} is a signal frame, and a
|
|
value of 0 otherwise. For the purpose of this discussion, a signal
|
|
frame is a frame that was created in response to a potentially
|
|
asynchronous interruption. For UNIX and UNIX-like platforms, such
|
|
frames are normally created by the kernel when delivering a signal.
|
|
In a kernel-environment, a signal frame might, for example, correspond
|
|
to a frame created in response to a device interrupt.
|
|
|
|
Signal frames are somewhat unusual because the asynchronous nature of
|
|
the events that create them require storing the contents of registers
|
|
that are normally treated as scratch (``caller-saved'') registers.
|
|
|
|
\section{Return Value}
|
|
|
|
On successful completion, \Func{unw\_is\_signal\_frame}() returns a
|
|
positive value if the current frame is a signal frame, or 0 if it is
|
|
not. Otherwise, a negative value of one of the error-codes below is
|
|
returned.
|
|
|
|
\section{Thread and Signal Safety}
|
|
|
|
\Func{unw\_is\_signal\_frame}() is thread-safe as well as safe to use
|
|
from a signal handler.
|
|
|
|
\section{Errors}
|
|
|
|
\begin{Description}
|
|
\item[\Const{UNW\_ENOINFO}] \Prog{Libunwind} is unable to determine
|
|
whether or not the current frame is a signal frame.
|
|
\end{Description}
|
|
|
|
\section{See Also}
|
|
|
|
\SeeAlso{libunwind(3)},
|
|
\SeeAlso{unw\_get\_reg(3)},
|
|
\SeeAlso{unw\_set\_reg(3)},
|
|
\SeeAlso{unw\_get\_fpreg(3)},
|
|
\SeeAlso{unw\_set\_fpreg(3)}
|
|
|
|
\section{Author}
|
|
|
|
\noindent
|
|
David Mosberger-Tang\\
|
|
Hewlett-Packard Labs\\
|
|
Palo-Alto, CA 94304\\
|
|
Email: \Email{davidm@hpl.hp.com}\\
|
|
WWW: \URL{http://www.hpl.hp.com/research/linux/libunwind/}.
|
|
\LatexManEnd
|
|
|
|
\end{document}
|