mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-11-14 20:28:12 +01:00
68 lines
2.1 KiB
TeX
68 lines
2.1 KiB
TeX
\documentclass{article}
|
|
\usepackage[fancyhdr,pdf]{latex2man}
|
|
|
|
\input{common.tex}
|
|
|
|
\begin{document}
|
|
|
|
\begin{Name}{3}{unw\_step}{David Mosberger-Tang}{Programming Library}{unw\_step}unw\_step -- advance to next stack frame
|
|
\end{Name}
|
|
|
|
\section{Synopsis}
|
|
|
|
\File{\#include $<$libunwind.h$>$}\\
|
|
|
|
\Type{int} \Func{unw\_step}(\Type{unw\_cursor\_t~*}\Var{cp});\\
|
|
|
|
\section{Description}
|
|
|
|
The \Func{unw\_step}() routine advances the unwind cursor \Var{cp} to
|
|
the next older, less deeply nested stack frame.
|
|
|
|
\section{Return Value}
|
|
|
|
On successful completion, \Func{unw\_step}() returns a positive value
|
|
if the updated cursor refers to a valid stack frame, or 0 if the
|
|
previous stack frame was the last frame in the chain. On error, the
|
|
negative value of one of the error-codes below is returned.
|
|
|
|
\section{Thread and Signal Safety}
|
|
|
|
\Func{unw\_step}() is thread-safe. If cursor \Var{cp} is in the local
|
|
address-space, this routine is also safe to use from a signal handler.
|
|
|
|
\section{Errors}
|
|
|
|
\begin{Description}
|
|
\item[\Const{UNW\_EUNSPEC}] An unspecified error occurred.
|
|
\item[\Const{UNW\_ENOINFO}] \Prog{Libunwind} was unable to locate the
|
|
unwind-info needed to complete the operation.
|
|
\item[\Const{UNW\_EBADVERSION}] The unwind-info needed to complete the
|
|
operation has a version or a format that is not understood by
|
|
\Prog{libunwind}.
|
|
\item[\Const{UNW\_EINVALIDIP}] The instruction-pointer
|
|
(``program-counter'') of the next stack frame is invalid (e.g., not
|
|
properly aligned).
|
|
\item[\Const{UNW\_EBADFRAME}] The next stack frame is invalid.
|
|
\item[\Const{UNW\_ESTOPUNWIND}] Returned if a call to
|
|
\Func{find\_proc\_info}() returned -\Const{UNW\_ESTOPUNWIND}.
|
|
\end{Description}
|
|
In addition, \Func{unw\_step}() may return any error returned by the
|
|
\Func{find\_proc\_info}(), \Func{get\_dyn\_info\_list\_addr}(),
|
|
\Func{access\_mem}(), \Func{access\_reg}(), or \Func{access\_fpreg}()
|
|
call-backs (see \Func{unw\_create\_addr\_space}(3)).
|
|
|
|
\section{See Also}
|
|
|
|
\SeeAlso{libunwind(3)},
|
|
\SeeAlso{unw\_create\_addr\_space(3)}
|
|
|
|
\section{Author}
|
|
|
|
\noindent
|
|
David Mosberger-Tang\\
|
|
Email: \Email{dmosberger@gmail.com}\\
|
|
WWW: \URL{http://www.nongnu.org/libunwind/}.
|
|
\LatexManEnd
|
|
|
|
\end{document}
|