Query: unw_set_fpreg
OS: debian
Section: 3
Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar
UNW_SET_FPREG(3) Programming Library UNW_SET_FPREG(3)NAMEunw_set_fpreg -- set contents of floating-point registerSYNOPSIS#include <libunwind.h> int unw_set_fpreg(unw_cursor_t *cp, unw_regnum_t reg, unw_fpreg_t val);DESCRIPTIONThe 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'') registers 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 VALUEOn successful completion, unw_set_fpreg() returns 0. Otherwise the negative value of one of the error-codes below is returned.THREAD AND SIGNAL SAFETYunw_set_fpreg() is thread-safe as well as safe to use from a signal handler.ERRORSUNW_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 ALSOlibunwind(3), libunwind-ia64(3), unw_get_fpreg(3), unw_is_fpreg(3), unw_is_signal_frame(3), unw_set_reg(3)AUTHORDavid Mosberger-Tang Email: dmosberger@gmail.com WWW: http://www.nongnu.org/libunwind/. Programming Library 16 August 2007 UNW_SET_FPREG(3)
Related Man Pages |
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libunwind-ia64(3) - debian |
libunwind(3) - debian |
unw_get_proc_info(3) - debian |
unw_set_caching_policy(3) - debian |
unw_set_fpreg(3) - debian |
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