NAME

Plwp_getasrs, Plwp_setasrs —

get and set SPARCv9 ancillary state registers

LIBRARY

Process Control Library (libproc, -lproc)

SYNOPSIS

#include
  <libproc.h>

int
Plwp_getasrs(struct ps_prochandle *P, lwpid_t lwpid, asrset_t asrs);

int
Plwp_setasrs(struct ps_prochandle *P, lwpid_t lwpid, const asrset_t asrs);

DESCRIPTION

The Plwp_getasrs() and Plwp_setasrs() functions get and set the ancillary thread-specific register set of the thread lwpid in the process handle P.

The ancillary state registers are only present on 64-bit SPARCv9 processes. They contain information that is specific to the platform and are not included in the information obtained through functions such as Plwp_getregs(3PROC), Plwp_getfpregs(3PROC), and Plwp_getxregs(3PROC).

The Plwp_getasrs() function reads the ancillary registers into asrs, while the Plwp_setasrs() sets the thread's ancillary registers to the values provided by asrs.

Processes should be stopped prior to obtaining the register state of individual threads. Processes may be stopped with Pstop(3PROC).

The asrset_t structure is described in proc(4).

One may not set the register values of a process that is not an active process, e.g. a process handle that refers to a file or a core file.

RETURN VALUES

Upon successful completion, the Plwp_getasrs() and Plwp_setasrs() functions return 0 and get or set the register state. Otherwise, -1 is returned and errno is set to indicate the error.

ERRORS

For a full list of possible errors see the DIAGNOSTICS section in proc(4).

The Plwp_getasrs() and Plwp_setasrs() function will fail if:


ENODATA: The process handle P does not have any ancillary register state information.

EBUSY: The process handle P refers to a live process and it is not stopped.

ENOENT: The process handle P refers to a live process and there is no thread with id lwpid or it is not a 64-bit SPARCv9 process.

EINVAL: The process handle P refers to a core file and there is no thread with id lwpid.

ARCHITECTURE

The Plwp_getasrs() and Plwp_setasrs() functions are only available on 64-bit SPARCv9 platforms.

INTERFACE STABILITY

Uncommitted

MT-LEVEL

See LOCKING in libproc(3LIB).