td_thr_setfpregs(3c_db)

1td_thr_getgregs(3C_DB)Threads Debugging Library Functionstd_thr_getgregs(3C_DB)
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NAME

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

11       cc [ flag... ] file... -lc_db [ library... ]
12       #include <proc_service.h>
13       #include <thread_db.h>
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15       td_err_e td_thr_getgregs(const td_thrhandle_t *th_p, prgregset_tgregset);
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18       td_err_e td_thr_setgregs(const td_thrhandle_t *th_p, prgregset_tgregset);
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21       td_err_e td_thr_getfpregs(const td_thrhandle_t *th_p, prfpregset_t *fpregset);
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24       td_err_e td_thr_setfpregs(const td_thrhandle_t *th_p, prfpregset_t *fpregset);
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27       td_err_e td_thr_getxregsize(const td_thrhandle_t *th_p, int *xregsize);
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30       td_err_e td_thr_getxregs(const td_thrhandle_t *th_p, prxregset_t *xregset);
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33       td_err_e td_thr_setxregs(const td_thrhandle_t *th_p, prxregset_t *xregset);
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DESCRIPTION

37       These functions read and write the register sets associated with thread
38       th_p. The td_thr_getgregs() and  td_thr_setgregs()  functions  get  and
39       set,   respectively,   the   general  registers  of  thread  th_p.  The
40       td_thr_getfpregs()  and  td_thr_setfpregs()  functions  get  and   set,
41       respectively,   the   thread's   floating   point   register  set.  The
42       td_thr_getxregsize(), td_thr_getxregs(),  and  td_thr_setxregs()  func‐
43       tions  are SPARC-specific. The td_thr_getxregsize() function returns in
44       *xregsize the size of the architecture-dependent extra state registers.
45       The  td_thr_getxregs()  and  td_thr_setxregs()  functions  get and set,
46       respectively, those extra state registers. On non-SPARC  architectures,
47       these functions return TD_NOXREGS.
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49
50       If the thread specified by th_p is currently executing on a lightweight
51       process ( LWP), these functions read or write, respectively, the appro‐
52       priate  register  set  to  the LWP using the imported interface. If the
53       thread is not  currently executing on an LWP, the  floating  point  and
54       extra  state  registers may cannot be read or written. Some of the gen‐
55       eral registers might also not be readable or writable, depending on the
56       architecture,  in  which case td_thr_getfpregs() and td_thr_setfpregs()
57       return  TD_NOFPREGS and td_thr_getxregs()  and  td_thr_setxregs()  will
58       TD_NOXREGS.  Calls  to td_thr_getgregs() and td_thr_setgregs() succeed,
59       but values returned for  unreadable  registers  are  undefined,  values
60       specified  for  unwritable registers are ignored. In this instance, and
61       TD_PARTIALREGS is returned.  See the architecture-specific  notes  that
62       follow  regarding  the  registers  that  may  be read and written for a
63       thread not currently executing on an LWP.
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65   SPARC
66       On a thread not currently assigned to an LWP,  only  %i0-%i7,  %l0-%l7,
67       %g7,  %pc,  and %sp (%o6) can be read or written.  %pc and %sp refer to
68       the program counter and stack pointer that the thread will have when it
69       resumes execution.
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71   x86 Architecture
72       On  a  thread  not  currently  assigned to an LWP, only %pc, %sp, %ebp,
73       %edi, %edi, and %ebx can be read.
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RETURN VALUES

76       TD_OK             The call completed successfully.
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79       TD_BADTH          An invalid thread handle was passed in.
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82       TD_DBERR          A call to one  of  the  imported  interface  routines
83                         failed.
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86       TD_PARTIALREGS    Because  the  thread  is  not currently assigned to a
87                         LWP, not all registers  were  read  or  written.  See
88                         DESCRIPTION  for  a  discussion about which registers
89                         are not saved when a thread is  not  assigned  to  an
90                         LWP.
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93       TD_NOFPREGS       Floating  point  registers could not be read or writ‐
94                         ten, either  because  the  thread  is  not  currently
95                         assigned  to an LWP, or because the architecture does
96                         not have such registers.
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99       TD_NOXREGS        Architecture-dependent extra  state  registers  could
100                         not  be read or written, either because the thread is
101                         not currently assigned to  an  LWP,  or  because  the
102                         architecture does not have such registers, or because
103                         the architecture is not a SPARC architecture.
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106       TD_ERR            A libc_db internal error occurred.
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ATTRIBUTES

110       See attributes(5) for description of the following attributes:
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115       ┌─────────────────────────────┬─────────────────────────────┐
116       │      ATTRIBUTE TYPE         │      ATTRIBUTE VALUE        │
117       ├─────────────────────────────┼─────────────────────────────┤
118       │MT-Level                     │Safe                         │
119       └─────────────────────────────┴─────────────────────────────┘
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NAME

SYNOPSIS

DESCRIPTION

RETURN VALUES

ATTRIBUTES

SEE ALSO