Manual Reference Pages - UNW_SET_FPREG (3)
-- set contents of floating-point register
Thread And Signal Safety
routine sets the value of register
in the stack frame identified by cursor cp
value passed in val.
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_set_fpreg()
can only write the contents of
floating-point registers. See unw_set_reg(3)
for a way to
write registers which fit in a single word.
On successful completion, unw_set_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_set_fpreg()
may return any error returned by
An unspecified error occurred.
An attempt was made to write a register
that is either invalid or not accessible in the current frame.
An attempt was made to write to a
|Programming Library ||UNW\_SET\_FPREG (3) ||16 August 2007 |
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