Set the CPU registers with the values provided for the process associated with the file descriptor.
#include <sys/procfs.h> #define DCMD_PROC_SETGREG __DIOT(_DCMD_PROC, __PROC_SUBCMD_PROCFS + 11, procfs_greg)
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_SETGREG |
| dev_data_ptr | A pointer to a procfs_greg structure |
| n_bytes | sizeof(procfs_greg) |
| dev_info_ptr | NULL |
The argument is a pointer to a procfs_greg structure (see debug_greg_t in <sys/debug.h>) that specifies the values to assign to the CPU registers. For example:
procfs_greg my_greg;
/* Set the members of my_greg as required. */
devctl( fd, DCMD_PROC_SETGREG, my_greg, sizeof(procfs_greg),
NULL);
To get the CPU registers, use DCMD_PROC_GETGREG.