td_thr_getgregs(3C_DB)					Threads Debugging Library Functions				    td_thr_getgregs(3C_DB)

NAME

       td_thr_getgregs,  td_thr_setgregs,  td_thr_getfpregs,  td_thr_setfpregs, td_thr_getxregsize, td_thr_getxregs, td_thr_setxregs - reading and
       writing thread registers in libc_db

SYNOPSIS

       cc [ flag... ] file... -lc_db [ library... ]
       #include <proc_service.h>
       #include <thread_db.h>

       td_err_e td_thr_getgregs(const td_thrhandle_t *th_p, prgregset_tgregset);

       td_err_e td_thr_setgregs(const td_thrhandle_t *th_p, prgregset_tgregset);

       td_err_e td_thr_getfpregs(const td_thrhandle_t *th_p, prfpregset_t *fpregset);

       td_err_e td_thr_setfpregs(const td_thrhandle_t *th_p, prfpregset_t *fpregset);

       td_err_e td_thr_getxregsize(const td_thrhandle_t *th_p, int *xregsize);

       td_err_e td_thr_getxregs(const td_thrhandle_t *th_p, prxregset_t *xregset);

       td_err_e td_thr_setxregs(const td_thrhandle_t *th_p, prxregset_t *xregset);

DESCRIPTION

       These functions read and write the register sets associated with thread th_p. The td_thr_getgregs() and td_thr_setgregs() functions get and
       set, respectively, the general registers of thread th_p. The td_thr_getfpregs() and td_thr_setfpregs() functions get and set, respectively,
       the thread's floating point register set. The td_thr_getxregsize(), td_thr_getxregs(), and td_thr_setxregs() functions are  SPARC-specific.
       The  td_thr_getxregsize() function returns in *xregsize the size of the architecture-dependent extra state registers. The td_thr_getxregs()
       and td_thr_setxregs() functions get and set, respectively, those extra state registers. On non-SPARC architectures, these functions  return
       TD_NOXREGS.

       If  the	thread	specified by th_p is currently executing on a lightweight process ( LWP), these functions read or write, respectively, the
       appropriate register set to the LWP using the imported interface. If the thread is not  currently executing on an LWP, the  floating  point
       and extra state registers may cannot be read or written. Some of the general registers might also not be readable or writable, depending on
       the architecture, in which case td_thr_getfpregs() and td_thr_setfpregs() return  TD_NOFPREGS and td_thr_getxregs()  and  td_thr_setxregs()
       will TD_NOXREGS. Calls to td_thr_getgregs() and td_thr_setgregs() succeed, but values returned for unreadable registers are undefined, val-
       ues specified for unwritable registers are ignored. In this instance, and TD_PARTIALREGS is returned.  See the architecture-specific  notes
       that follow regarding the registers that may be read and written for a thread not currently executing on an LWP.

   SPARC
       On  a thread not currently assigned to an LWP, only %i0-%i7, %l0-%l7, %g7, %pc, and %sp (%o6) can be read or written.  %pc and %sp refer to
       the program counter and stack pointer that the thread will have when it resumes execution.

   x86 Architecture
       On a thread not currently assigned to an LWP, only %pc, %sp, %ebp, %edi, %edi, and %ebx can be read.

RETURN VALUES

       TD_OK		 The call completed successfully.

       TD_BADTH 	 An invalid thread handle was passed in.

       TD_DBERR 	 A call to one of the imported interface routines failed.

       TD_PARTIALREGS	 Because the thread is not currently assigned to a LWP, not all registers were read or written. See DESCRIPTION for a dis-
			 cussion about which registers are not saved when a thread is not assigned to an LWP.

       TD_NOFPREGS	 Floating  point registers could not be read or written, either because the thread is not currently assigned to an LWP, or
			 because the architecture does not have such registers.

       TD_NOXREGS	 Architecture-dependent extra state registers could not be read or written, either because the	thread	is  not  currently
			 assigned  to an LWP, or because the architecture does not have such registers, or because the architecture is not a SPARC
			 architecture.

       TD_ERR		 A libc_db internal error occurred.

ATTRIBUTES

       See attributes(5) for description of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       libc_db(3LIB), attributes(5)

SunOS 5.11							    20 Oct 1998 					    td_thr_getgregs(3C_DB)