Manual Reference Pages - UNW_GET_FPREG (3)
-- get contents of floating-point register
Thread And Signal Safety
routine reads the value of floating-point
in the stack frame identified by cursor cp
and stores the value in the variable pointed to by valp.
The register numbering is target-dependent and described in separate
manual pages (e.g., libunwind-ia64(3) for the IA-64 target).
Furthermore, the exact set of accessible registers may depend on the
type of frame that cp
is referring to. For ordinary stack
frames, it is normally possible to access only the preserved
(callee-saved) registers and frame-related registers (such as the
stack-pointer). However, for signal frames (see
it is usually possible to access
Note that unw_get_fpreg()
can only read the contents of
floating-point registers. See unw_get_fpreg(3)
for a way to
read registers which fit in a single word.
On successful completion, unw_get_fpreg()
Otherwise the negative value of one of the error-codes below is
THREAD AND SIGNAL SAFETY
is thread-safe as well as safe to use
from a signal handler.
In addition, unw_get_fpreg()
may return any error returned by
An unspecified error occurred.
An attempt was made to read a register
that is either invalid or not accessible in the current frame.
|Programming Library ||UNW\_GET\_FPREG (3) ||16 August 2007 |
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