Set the Floating Point Data registers with the values provided for the process associated with the file descriptor.
#include <sys/procfs.h> #define DCMD_PROC_SETFPREG __DIOT(_DCMD_PROC, __PROC_SUBCMD_PROCFS + 13, procfs_fpreg)
The arguments to devctl() are:
| Argument | Value |
|---|---|
| filedes | A file descriptor for the process. You must have opened the file descriptor for writing. |
| dcmd | DCMD_PROC_SETFPREG |
| dev_data_ptr | A pointer to a procfs_fpreg structure |
| n_bytes | sizeof(procfs_fpreg) |
| dev_info_ptr | NULL |
The argument is a pointer to a procfs_fpreg structure (see debug_fpreg_t in <sys/debug.h>) that specifies the values of the Floating Point Data registers. For example:
procfs_fpreg my_fpreg;
/* Set the members of my_fpreg as required. */
devctl( fd, DCMD_PROC_SETFPREG, my_fpreg, sizeof(procfs_fpreg),
NULL);
To get the Floating Point Data registers, use DCMD_PROC_GETFPREG.