unw_set_fpreg man page on SuSE

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UNW_SET_FPREG(3)	     Programming Library	      UNW_SET_FPREG(3)

NAME
       unw_set_fpreg -- set contents of floating-point register

SYNOPSIS
       #include <libunwind.h>

       int unw_set_fpreg(unw_cursor_t *cp, unw_regnum_t reg, unw_fpreg_t val);

DESCRIPTION
       The unw_set_fpreg() routine sets the value of register reg in the stack
       frame identified by cursor cp to the 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).  Further‐
       more, the exact set of accessible registers may depend on the  type  of
       frame  that  cp	is referring to. For ordinary stack frames, it is nor‐
       mally possible to access only the preserved  (``callee-saved'')	regis‐
       ters  and frame-related registers (such as the stack-pointer). However,
       for signal frames (see unw_is_signal_frame(3)), it is usually  possible
       to access all registers.

       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.

RETURN VALUE
       On  successful  completion,  unw_set_fpreg()  returns 0.	 Otherwise the
       negative value of one of the error-codes below is returned.

THREAD AND SIGNAL SAFETY
       unw_set_fpreg() is thread-safe as well as safe to  use  from  a	signal
       handler.

ERRORS
       UNW_EUNSPEC
	       An unspecified error occurred.

       UNW_EBADREG
	       An  attempt was made to write a register that is either invalid
	      or not accessible in the current frame.

       UNW_EREADONLY
	       An attempt was made to write to a read-only register.

       In addition, unw_set_fpreg() may	 return	 any  error  returned  by  the
       access_mem(), access_reg(), and access_fpreg() call-backs (see unw_cre‐
       ate_addr_space(3)).

SEE ALSO
       libunwind(3),  libunwind-ia64(3),  unw_get_fpreg(3),   unw_is_fpreg(3),
       unw_is_signal_frame(3), unw_set_reg(3)

AUTHOR
       David Mosberger-Tang
       Hewlett-Packard Labs
       Palo-Alto, CA 94304
       Email: davidm@hpl.hp.com
       WWW: http://www.hpl.hp.com/research/linux/libunwind/.

Programming Library		05 August 2004		      UNW_SET_FPREG(3)
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