/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2004 Marcel Moolenaar
* Copyright (c) 2005 David Xu
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <proc_service.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/linker_set.h>
#include <sys/ptrace.h>
#include <thread_db.h>
#include <unistd.h>
#include "thread_db_int.h"
#define TERMINATED 1
struct td_thragent {
TD_THRAGENT_FIELDS;
psaddr_t libthr_debug_addr;
psaddr_t thread_list_addr;
psaddr_t thread_active_threads_addr;
psaddr_t thread_keytable_addr;
psaddr_t thread_last_event_addr;
psaddr_t thread_event_mask_addr;
psaddr_t thread_bp_create_addr;
psaddr_t thread_bp_death_addr;
int thread_off_dtv;
int thread_off_tlsindex;
int thread_off_attr_flags;
int thread_size_key;
int thread_off_tcb;
int thread_off_linkmap;
int thread_off_next;
int thread_off_state;
int thread_off_tid;
int thread_max_keys;
int thread_off_key_allocated;
int thread_off_key_destructor;
int thread_off_report_events;
int thread_off_event_mask;
int thread_off_event_buf;
int thread_state_zoombie;
int thread_state_running;
};
#define P2T(c) ps2td(c)
static int pt_validate(const td_thrhandle_t *th);
static int
ps2td(int c)
{
switch (c) {
case PS_OK:
return TD_OK;
case PS_ERR:
return TD_ERR;
case PS_BADPID:
return TD_BADPH;
case PS_BADLID:
return TD_NOLWP;
case PS_BADADDR:
return TD_ERR;
case PS_NOSYM:
return TD_NOLIBTHREAD;
case PS_NOFREGS:
return TD_NOFPREGS;
default:
return TD_ERR;
}
}
static td_err_e
pt_init(void)
{
return (0);
}
static td_err_e
pt_ta_new(struct ps_prochandle *ph, td_thragent_t **pta)
{
#define LOOKUP_SYM(proc, sym, addr) \
ret = ps_pglobal_lookup(proc, NULL, sym, addr); \
if (ret != 0) { \
TDBG("can not find symbol: %s\n", sym); \
ret = TD_NOLIBTHREAD; \
goto error; \
}
#define LOOKUP_VAL(proc, sym, val) \
ret = ps_pglobal_lookup(proc, NULL, sym, &vaddr);\
if (ret != 0) { \
TDBG("can not find symbol: %s\n", sym); \
ret = TD_NOLIBTHREAD; \
goto error; \
} \
ret = ps_pread(proc, vaddr, val, sizeof(int)); \
if (ret != 0) { \
TDBG("can not read value of %s\n", sym);\
ret = TD_NOLIBTHREAD; \
goto error; \
}
td_thragent_t *ta;
psaddr_t vaddr;
int dbg;
int ret;
TDBG_FUNC();
ta = malloc(sizeof(td_thragent_t));
if (ta == NULL)
return (TD_MALLOC);
ta->ph = ph;
LOOKUP_SYM(ph, "_libthr_debug", &ta->libthr_debug_addr);
LOOKUP_SYM(ph, "_thread_list", &ta->thread_list_addr);
LOOKUP_SYM(ph, "_thread_active_threads",&ta->thread_active_threads_addr);
LOOKUP_SYM(ph, "_thread_keytable", &ta->thread_keytable_addr);
LOOKUP_SYM(ph, "_thread_last_event", &ta->thread_last_event_addr);
LOOKUP_SYM(ph, "_thread_event_mask", &ta->thread_event_mask_addr);
LOOKUP_SYM(ph, "_thread_bp_create", &ta->thread_bp_create_addr);
LOOKUP_SYM(ph, "_thread_bp_death", &ta->thread_bp_death_addr);
LOOKUP_VAL(ph, "_thread_off_dtv", &ta->thread_off_dtv);
LOOKUP_VAL(ph, "_thread_off_tlsindex", &ta->thread_off_tlsindex);
LOOKUP_VAL(ph, "_thread_off_attr_flags", &ta->thread_off_attr_flags);
LOOKUP_VAL(ph, "_thread_size_key", &ta->thread_size_key);
LOOKUP_VAL(ph, "_thread_off_tcb", &ta->thread_off_tcb);
LOOKUP_VAL(ph, "_thread_off_tid", &ta->thread_off_tid);
LOOKUP_VAL(ph, "_thread_off_linkmap", &ta->thread_off_linkmap);
LOOKUP_VAL(ph, "_thread_off_next", &ta->thread_off_next);
LOOKUP_VAL(ph, "_thread_off_state", &ta->thread_off_state);
LOOKUP_VAL(ph, "_thread_max_keys", &ta->thread_max_keys);
LOOKUP_VAL(ph, "_thread_off_key_allocated", &ta->thread_off_key_allocated);
LOOKUP_VAL(ph, "_thread_off_key_destructor", &ta->thread_off_key_destructor);
LOOKUP_VAL(ph, "_thread_state_running", &ta->thread_state_running);
LOOKUP_VAL(ph, "_thread_state_zoombie", &ta->thread_state_zoombie);
LOOKUP_VAL(ph, "_thread_off_report_events", &ta->thread_off_report_events);
LOOKUP_VAL(ph, "_thread_off_event_mask", &ta->thread_off_event_mask);
LOOKUP_VAL(ph, "_thread_off_event_buf", &ta->thread_off_event_buf);
dbg = getpid();
/*
* If this fails it probably means we're debugging a core file and
* can't write to it.
*/
ps_pwrite(ph, ta->libthr_debug_addr, &dbg, sizeof(int));
*pta = ta;
return (0);
error:
free(ta);
return (ret);
}
static td_err_e
pt_ta_delete(td_thragent_t *ta)
{
int dbg;
TDBG_FUNC();
dbg = 0;
/*
* Error returns from this write are not really a problem;
* the process doesn't exist any more.
*/
ps_pwrite(ta->ph, ta->libthr_debug_addr, &dbg, sizeof(int));
free(ta);
return (TD_OK);
}
static td_err_e
pt_ta_map_id2thr(const td_thragent_t *ta, thread_t id, td_thrhandle_t *th)
{
psaddr_t pt;
int64_t lwp;
int ret;
TDBG_FUNC();
if (id == 0)
return (TD_NOTHR);
ret = thr_pread_ptr(ta, ta->thread_list_addr, &pt);
if (ret != 0)
return (TD_ERR);
/* Iterate through thread list to find pthread */
while (pt != 0) {
ret = thr_pread_long(ta, pt + ta->thread_off_tid, &lwp);
if (ret != 0)
return (TD_ERR);
if (lwp == id)
break;
/* get next thread */
ret = thr_pread_ptr(ta, pt + ta->thread_off_next, &pt);
if (ret != 0)
return (TD_ERR);
}
if (pt == 0)
return (TD_NOTHR);
th->th_ta = ta;
th->th_tid = id;
th->th_thread = pt;
return (TD_OK);
}
static td_err_e
pt_ta_map_lwp2thr(const td_thragent_t *ta, lwpid_t lwp, td_thrhandle_t *th)
{
return (pt_ta_map_id2thr(ta, lwp, th));
}
static td_err_e
pt_ta_thr_iter(const td_thragent_t *ta, td_thr_iter_f *callback,
void *cbdata_p, td_thr_state_e state __unused, int ti_pri __unused,
sigset_t *ti_sigmask_p __unused, unsigned int ti_user_flags __unused)
{
td_thrhandle_t th;
psaddr_t pt;
int64_t lwp;
int ret;
TDBG_FUNC();
ret = thr_pread_ptr(ta, ta->thread_list_addr, &pt);
if (ret != 0)
return (TD_ERR);
while (pt != 0) {
ret = thr_pread_long(ta, pt + ta->thread_off_tid, &lwp);
if (ret != 0)
return (TD_ERR);
if (lwp != 0 && lwp != TERMINATED) {
th.th_ta = ta;
th.th_tid = (thread_t)lwp;
th.th_thread = pt;
if ((*callback)(&th, cbdata_p))
return (TD_DBERR);
}
/* get next thread */
ret = thr_pread_ptr(ta, pt + ta->thread_off_next, &pt);
if (ret != 0)
return (TD_ERR);
}
return (TD_OK);
}
static td_err_e
pt_ta_tsd_iter(const td_thragent_t *ta, td_key_iter_f *ki, void *arg)
{
void *keytable;
void *destructor;
int i, ret, allocated;
TDBG_FUNC();
keytable = malloc(ta->thread_max_keys * ta->thread_size_key);
if (keytable == NULL)
return (TD_MALLOC);
ret = ps_pread(ta->ph, (psaddr_t)ta->thread_keytable_addr, keytable,
ta->thread_max_keys * ta->thread_size_key);
if (ret != 0) {
free(keytable);
return (P2T(ret));
}
for (i = 0; i < ta->thread_max_keys; i++) {
allocated = *(int *)(void *)((uintptr_t)keytable +
i * ta->thread_size_key + ta->thread_off_key_allocated);
destructor = *(void **)(void *)((uintptr_t)keytable +
i * ta->thread_size_key + ta->thread_off_key_destructor);
if (allocated) {
ret = (ki)(i, destructor, arg);
if (ret != 0) {
free(keytable);
return (TD_DBERR);
}
}
}
free(keytable);
return (TD_OK);
}
static td_err_e
pt_ta_event_addr(const td_thragent_t *ta, td_event_e event, td_notify_t *ptr)
{
TDBG_FUNC();
switch (event) {
case TD_CREATE:
ptr->type = NOTIFY_BPT;
ptr->u.bptaddr = ta->thread_bp_create_addr;
return (0);
case TD_DEATH:
ptr->type = NOTIFY_BPT;
ptr->u.bptaddr = ta->thread_bp_death_addr;
return (0);
default:
return (TD_ERR);
}
}
static td_err_e
pt_ta_set_event(const td_thragent_t *ta, td_thr_events_t *events)
{
td_thr_events_t mask;
int ret;
TDBG_FUNC();
ret = ps_pread(ta->ph, ta->thread_event_mask_addr, &mask,
sizeof(mask));
if (ret != 0)
return (P2T(ret));
mask |= *events;
ret = ps_pwrite(ta->ph, ta->thread_event_mask_addr, &mask,
sizeof(mask));
return (P2T(ret));
}
static td_err_e
pt_ta_clear_event(const td_thragent_t *ta, td_thr_events_t *events)
{
td_thr_events_t mask;
int ret;
TDBG_FUNC();
ret = ps_pread(ta->ph, ta->thread_event_mask_addr, &mask,
sizeof(mask));
if (ret != 0)
return (P2T(ret));
mask &= ~*events;
ret = ps_pwrite(ta->ph, ta->thread_event_mask_addr, &mask,
sizeof(mask));
return (P2T(ret));
}
static td_err_e
pt_ta_event_getmsg(const td_thragent_t *ta, td_event_msg_t *msg)
{
static td_thrhandle_t handle;
psaddr_t pt;
td_thr_events_e tmp;
int64_t lwp;
int ret;
TDBG_FUNC();
ret = thr_pread_ptr(ta, ta->thread_last_event_addr, &pt);
if (ret != 0)
return (TD_ERR);
if (pt == 0)
return (TD_NOMSG);
/*
* Take the event pointer, at the time, libthr only reports event
* once a time, so it is not a link list.
*/
thr_pwrite_ptr(ta, ta->thread_last_event_addr, 0);
/* Read event info */
ret = ps_pread(ta->ph, pt + ta->thread_off_event_buf, msg, sizeof(*msg));
if (ret != 0)
return (P2T(ret));
if (msg->event == 0)
return (TD_NOMSG);
/* Clear event */
tmp = 0;
ps_pwrite(ta->ph, pt + ta->thread_off_event_buf, &tmp, sizeof(tmp));
/* Convert event */
pt = msg->th_p;
ret = thr_pread_long(ta, pt + ta->thread_off_tid, &lwp);
if (ret != 0)
return (TD_ERR);
handle.th_ta = ta;
handle.th_tid = lwp;
handle.th_thread = pt;
msg->th_p = (uintptr_t)&handle;
return (0);
}
static td_err_e
pt_dbsuspend(const td_thrhandle_t *th, int suspend)
{
const td_thragent_t *ta = th->th_ta;
int ret;
TDBG_FUNC();
ret = pt_validate(th);
if (ret)
return (ret);
if (suspend)
ret = ps_lstop(ta->ph, th->th_tid);
else
ret = ps_lcontinue(ta->ph, th->th_tid);
return (P2T(ret));
}
static td_err_e
pt_thr_dbresume(const td_thrhandle_t *th)
{
TDBG_FUNC();
return pt_dbsuspend(th, 0);
}
static td_err_e
pt_thr_dbsuspend(const td_thrhandle_t *th)
{
TDBG_FUNC();
return pt_dbsuspend(th, 1);
}
static td_err_e
pt_thr_validate(const td_thrhandle_t *th)
{
td_thrhandle_t temp;
int ret;
TDBG_FUNC();
ret = pt_ta_map_id2thr(th->th_ta, th->th_tid, &temp);
return (ret);
}
static td_err_e
pt_thr_get_info_common(const td_thrhandle_t *th, td_thrinfo_t *info, int old)
{
const td_thragent_t *ta = th->th_ta;
struct ptrace_lwpinfo linfo;
int traceme;
int state;
int ret;
TDBG_FUNC();
bzero(info, sizeof(*info));
ret = pt_validate(th);
if (ret)
return (ret);
ret = thr_pread_int(ta, th->th_thread + ta->thread_off_state, &state);
if (ret != 0)
return (TD_ERR);
ret = thr_pread_int(ta, th->th_thread + ta->thread_off_report_events,
&traceme);
info->ti_traceme = traceme;
if (ret != 0)
return (TD_ERR);
ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_event_mask,
&info->ti_events, sizeof(td_thr_events_t));
if (ret != 0)
return (P2T(ret));
ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_tcb,
&info->ti_tls, sizeof(void *));
info->ti_lid = th->th_tid;
info->ti_tid = th->th_tid;
info->ti_thread = th->th_thread;
info->ti_ta_p = th->th_ta;
ret = ps_linfo(ta->ph, th->th_tid, &linfo);
if (ret == PS_OK) {
info->ti_sigmask = linfo.pl_sigmask;
info->ti_pending = linfo.pl_siglist;
if (!old) {
if ((linfo.pl_flags & PL_FLAG_SI) != 0)
info->ti_siginfo = linfo.pl_siginfo;
else
bzero(&info->ti_siginfo,
sizeof(info->ti_siginfo));
}
} else
return (ret);
if (state == ta->thread_state_running)
info->ti_state = TD_THR_RUN;
else if (state == ta->thread_state_zoombie)
info->ti_state = TD_THR_ZOMBIE;
else
info->ti_state = TD_THR_SLEEP;
info->ti_type = TD_THR_USER;
return (0);
}
static td_err_e
pt_thr_old_get_info(const td_thrhandle_t *th, td_old_thrinfo_t *info)
{
return (pt_thr_get_info_common(th, (td_thrinfo_t *)info, 1));
}
static td_err_e
pt_thr_get_info(const td_thrhandle_t *th, td_thrinfo_t *info)
{
return (pt_thr_get_info_common(th, info, 0));
}
#ifdef __i386__
static td_err_e
pt_thr_getxmmregs(const td_thrhandle_t *th, char *fxsave)
{
const td_thragent_t *ta = th->th_ta;
int ret;
TDBG_FUNC();
ret = pt_validate(th);
if (ret)
return (ret);
ret = ps_lgetxmmregs(ta->ph, th->th_tid, fxsave);
return (P2T(ret));
}
#endif
static td_err_e
pt_thr_getfpregs(const td_thrhandle_t *th, prfpregset_t *fpregs)
{
const td_thragent_t *ta = th->th_ta;
int ret;
TDBG_FUNC();
ret = pt_validate(th);
if (ret)
return (ret);
ret = ps_lgetfpregs(ta->ph, th->th_tid, fpregs);
return (P2T(ret));
}
static td_err_e
pt_thr_getgregs(const td_thrhandle_t *th, prgregset_t gregs)
{
const td_thragent_t *ta = th->th_ta;
int ret;
TDBG_FUNC();
ret = pt_validate(th);
if (ret)
return (ret);
ret = ps_lgetregs(ta->ph, th->th_tid, gregs);
return (P2T(ret));
}
#ifdef __i386__
static td_err_e
pt_thr_setxmmregs(const td_thrhandle_t *th, const char *fxsave)
{
const td_thragent_t *ta = th->th_ta;
int ret;
TDBG_FUNC();
ret = pt_validate(th);
if (ret)
return (ret);
ret = ps_lsetxmmregs(ta->ph, th->th_tid, fxsave);
return (P2T(ret));
}
#endif
static td_err_e
pt_thr_setfpregs(const td_thrhandle_t *th, const prfpregset_t *fpregs)
{
const td_thragent_t *ta = th->th_ta;
int ret;
TDBG_FUNC();
ret = pt_validate(th);
if (ret)
return (ret);
ret = ps_lsetfpregs(ta->ph, th->th_tid, fpregs);
return (P2T(ret));
}
static td_err_e
pt_thr_setgregs(const td_thrhandle_t *th, const prgregset_t gregs)
{
const td_thragent_t *ta = th->th_ta;
int ret;
TDBG_FUNC();
ret = pt_validate(th);
if (ret)
return (ret);
ret = ps_lsetregs(ta->ph, th->th_tid, gregs);
return (P2T(ret));
}
static td_err_e
pt_thr_event_enable(const td_thrhandle_t *th, int en)
{
const td_thragent_t *ta = th->th_ta;
int ret;
TDBG_FUNC();
ret = ps_pwrite(ta->ph, th->th_thread + ta->thread_off_report_events,
&en, sizeof(int));
return (P2T(ret));
}
static td_err_e
pt_thr_set_event(const td_thrhandle_t *th, td_thr_events_t *setp)
{
const td_thragent_t *ta = th->th_ta;
td_thr_events_t mask;
int ret;
TDBG_FUNC();
ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_event_mask,
&mask, sizeof(mask));
mask |= *setp;
ret = ps_pwrite(ta->ph, th->th_thread + ta->thread_off_event_mask,
&mask, sizeof(mask));
return (P2T(ret));
}
static td_err_e
pt_thr_clear_event(const td_thrhandle_t *th, td_thr_events_t *setp)
{
const td_thragent_t *ta = th->th_ta;
td_thr_events_t mask;
int ret;
TDBG_FUNC();
ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_event_mask,
&mask, sizeof(mask));
mask &= ~*setp;
ret = ps_pwrite(ta->ph, th->th_thread + ta->thread_off_event_mask,
&mask, sizeof(mask));
return (P2T(ret));
}
static td_err_e
pt_thr_event_getmsg(const td_thrhandle_t *th, td_event_msg_t *msg)
{
static td_thrhandle_t handle;
const td_thragent_t *ta = th->th_ta;
psaddr_t pt, pt_temp;
int64_t lwp;
int ret;
td_thr_events_e tmp;
TDBG_FUNC();
pt = th->th_thread;
ret = thr_pread_ptr(ta, ta->thread_last_event_addr, &pt_temp);
if (ret != 0)
return (TD_ERR);
/* Get event */
ret = ps_pread(ta->ph, pt + ta->thread_off_event_buf, msg, sizeof(*msg));
if (ret != 0)
return (P2T(ret));
if (msg->event == 0)
return (TD_NOMSG);
/*
* Take the event pointer, at the time, libthr only reports event
* once a time, so it is not a link list.
*/
if (pt == pt_temp)
thr_pwrite_ptr(ta, ta->thread_last_event_addr, 0);
/* Clear event */
tmp = 0;
ps_pwrite(ta->ph, pt + ta->thread_off_event_buf, &tmp, sizeof(tmp));
/* Convert event */
pt = msg->th_p;
ret = thr_pread_long(ta, pt + ta->thread_off_tid, &lwp);
if (ret != 0)
return (TD_ERR);
handle.th_ta = ta;
handle.th_tid = lwp;
handle.th_thread = pt;
msg->th_p = (uintptr_t)&handle;
return (0);
}
static td_err_e
pt_thr_sstep(const td_thrhandle_t *th, int step __unused)
{
TDBG_FUNC();
return pt_validate(th);
}
static int
pt_validate(const td_thrhandle_t *th)
{
if (th->th_tid == 0 || th->th_thread == 0)
return (TD_ERR);
return (TD_OK);
}
static td_err_e
pt_thr_tls_get_addr(const td_thrhandle_t *th, psaddr_t _linkmap, size_t offset,
psaddr_t *address)
{
const td_thragent_t *ta = th->th_ta;
psaddr_t dtv_addr, obj_entry, tcb_addr;
int tls_index, ret;
/* linkmap is a member of Obj_Entry */
obj_entry = _linkmap - ta->thread_off_linkmap;
/* get tlsindex of the object file */
ret = ps_pread(ta->ph,
obj_entry + ta->thread_off_tlsindex,
&tls_index, sizeof(tls_index));
if (ret != 0)
return (P2T(ret));
/* get thread tcb */
ret = ps_pread(ta->ph, th->th_thread + ta->thread_off_tcb,
&tcb_addr, sizeof(tcb_addr));
if (ret != 0)
return (P2T(ret));
/* get dtv array address */
ret = ps_pread(ta->ph, tcb_addr + ta->thread_off_dtv,
&dtv_addr, sizeof(dtv_addr));
if (ret != 0)
return (P2T(ret));
/* now get the object's tls block base address */
ret = ps_pread(ta->ph, dtv_addr + sizeof(void *) * (tls_index+1),
address, sizeof(*address));
if (ret != 0)
return (P2T(ret));
*address += offset;
return (TD_OK);
}
static struct ta_ops libthr_db_ops = {
.to_init = pt_init,
.to_ta_clear_event = pt_ta_clear_event,
.to_ta_delete = pt_ta_delete,
.to_ta_event_addr = pt_ta_event_addr,
.to_ta_event_getmsg = pt_ta_event_getmsg,
.to_ta_map_id2thr = pt_ta_map_id2thr,
.to_ta_map_lwp2thr = pt_ta_map_lwp2thr,
.to_ta_new = pt_ta_new,
.to_ta_set_event = pt_ta_set_event,
.to_ta_thr_iter = pt_ta_thr_iter,
.to_ta_tsd_iter = pt_ta_tsd_iter,
.to_thr_clear_event = pt_thr_clear_event,
.to_thr_dbresume = pt_thr_dbresume,
.to_thr_dbsuspend = pt_thr_dbsuspend,
.to_thr_event_enable = pt_thr_event_enable,
.to_thr_event_getmsg = pt_thr_event_getmsg,
.to_thr_old_get_info = pt_thr_old_get_info,
.to_thr_get_info = pt_thr_get_info,
.to_thr_getfpregs = pt_thr_getfpregs,
.to_thr_getgregs = pt_thr_getgregs,
.to_thr_set_event = pt_thr_set_event,
.to_thr_setfpregs = pt_thr_setfpregs,
.to_thr_setgregs = pt_thr_setgregs,
.to_thr_validate = pt_thr_validate,
.to_thr_tls_get_addr = pt_thr_tls_get_addr,
/* FreeBSD specific extensions. */
.to_thr_sstep = pt_thr_sstep,
#ifdef __i386__
.to_thr_getxmmregs = pt_thr_getxmmregs,
.to_thr_setxmmregs = pt_thr_setxmmregs,
#endif
};
DATA_SET(__ta_ops, libthr_db_ops);
