1 \documentclass{article}
2 \usepackage[fancyhdr,pdf]{latex2man}
8 \begin{Name}{3}{unw\_get\_fpreg}{David Mosberger-Tang}{Programming Library}{unw\_get\_fpreg}unw\_get\_fpreg -- get contents of floating-point register
13 \File{\#include $<$libunwind.h$>$}\\
15 \Type{int} \Func{unw\_get\_fpreg}(\Type{unw\_cursor\_t~*}\Var{cp}, \Type{unw\_regnum\_t} \Var{reg}, \Type{unw\_fpreg\_t~*}\Var{valp});\\
19 The \Func{unw\_get\_fpreg}() routine reads the value of floating-point
20 register \Var{reg} in the stack frame identified by cursor \Var{cp}
21 and stores the value in the variable pointed to by \Var{valp}.
23 The register numbering is target-dependent and described in separate
24 manual pages (e.g., libunwind-ia64(3) for the IA-64 target).
25 Furthermore, the exact set of accessible registers may depend on the
26 type of frame that \Var{cp} is referring to. For ordinary stack
27 frames, it is normally possible to access only the preserved
28 (``callee-saved'') registers and frame-related registers (such as the
29 stack-pointer). However, for signal frames (see
30 \Func{unw\_is\_signal\_frame}(3)), it is usually possible to access
33 Note that \Func{unw\_get\_fpreg}() can only read the contents of
34 floating-point registers. See \Func{unw\_get\_fpreg}(3) for a way to
35 read registers which fit in a single word.
37 \section{Return Value}
39 On successful completion, \Func{unw\_get\_fpreg}() returns 0.
40 Otherwise the negative value of one of the error-codes below is
43 \section{Thread and Signal Safety}
45 \Func{unw\_get\_fpreg}() is thread-safe as well as safe to use
46 from a signal handler.
51 \item[\Const{UNW\_EUNSPEC}] An unspecified error occurred.
52 \item[\Const{UNW\_EBADREG}] An attempt was made to read a register
53 that is either invalid or not accessible in the current frame.
55 In addition, \Func{unw\_get\_fpreg}() may return any error returned by
56 the \Func{access\_mem}(), \Func{access\_reg}(), and
57 \Func{access\_fpreg}() call-backs (see
58 \Func{unw\_create\_addr\_space}(3)).
62 \SeeAlso{libunwind(3)},
63 \SeeAlso{libunwind-ia64(3)},
64 \SeeAlso{unw\_get\_reg(3)},
65 \SeeAlso{unw\_is\_fpreg(3)},
66 \SeeAlso{unw\_is\_signal\_frame(3)},
67 \SeeAlso{unw\_set\_fpreg(3)}
72 David Mosberger-Tang\\
73 Email: \Email{dmosberger@gmail.com}\\
74 WWW: \URL{http://www.nongnu.org/libunwind/}.