OpenE2K
/
glibc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

* sysdeps/powerpc/powerpc32/dl-trampoline.S (_dl_runtime_resolve): 

Don't clobber caller's LRSAVE.
	(_dl_prof_resolve): Likewise.
This commit is contained in:
Ulrich Drepper 2006-08-14 23:11:18 +00:00
parent 107b8a922a
commit f17efcb43e
25 changed files with 1249 additions and 43 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
ChangeLog
View File

@ -1,3 +1,9 @@
2006-08-13 Andreas Schwab <schwab@suse.de>
* sysdeps/powerpc/powerpc32/dl-trampoline.S (_dl_runtime_resolve):
Don't clobber caller's LRSAVE.
(_dl_prof_resolve): Likewise.
2006-08-14 Ulrich Drepper <drepper@redhat.com>
[BZ #1996]

39
nptl/ChangeLog
View File

@ -1,3 +1,42 @@
2006-08-14 Jakub Jelinek <jakub@redhat.com>
* sysdeps/unix/sysv/linux/bits/posix_opt.h
(_POSIX_THREAD_PRIO_PROTECT): Define to 200112L.
* descr.h (struct priority_protection_data): New type.
(struct pthread): Add tpp field.
* pthreadP.h (PTHREAD_MUTEX_PP_NORMAL_NP,
PTHREAD_MUTEX_PP_RECURSIVE_NP, PTHREAD_MUTEX_PP_ERRORCHECK_NP,
PTHREAD_MUTEX_PP_ADAPTIVE_NP): New enum values.
* pthread_mutex_init.c (__pthread_mutex_init): Handle non-robust
TPP mutexes.
* pthread_mutex_lock.c (__pthread_mutex_lock): Handle TPP mutexes.
* pthread_mutex_trylock.c (__pthread_mutex_trylock): Likewise.
* pthread_mutex_timedlock.c (pthread_mutex_timedlock): Likewise.
* pthread_mutex_unlock.c (__pthread_mutex_unlock_usercnt): Likewise.
* tpp.c: New file.
* pthread_setschedparam.c (__pthread_setschedparam): Handle priority
boosted by TPP.
* pthread_setschedprio.c (pthread_setschedprio): Likewise.
* pthread_mutexattr_getprioceiling.c
(pthread_mutexattr_getprioceiling): If ceiling is 0, ensure it is
in the SCHED_FIFO priority range.
* pthread_mutexattr_setprioceiling.c
(pthread_mutexattr_setprioceiling): Fix prioceiling validation.
* pthread_mutex_getprioceiling.c (pthread_mutex_getprioceiling): Fail
if mutex is not TPP. Ceiling is now in __data.__lock.
* pthread_mutex_setprioceiling.c: Include stdbool.h.
(pthread_mutex_setprioceiling): Fix prioceiling validation. Ceiling
is now in __data.__lock. Add locking.
* pthread_create.c (__free_tcb): Free pd->tpp structure.
* Makefile (libpthread-routines): Add tpp.
(xtests): Add tst-mutexpp1, tst-mutexpp6 and tst-mutexpp10.
* tst-tpp.h: New file.
* tst-mutexpp1.c: New file.
* tst-mutexpp6.c: New file.
* tst-mutexpp10.c: New file.
* tst-mutex1.c (TEST_FUNCTION): Don't redefine if already defined.
* tst-mutex6.c (TEST_FUNCTION): Likewise.
2006-08-12 Ulrich Drepper <drepper@redhat.com>
[BZ #2843]

11
nptl/descr.h
View File

@ -111,6 +111,14 @@ struct robust_list_head
};
/* Data strcture used to handle thread priority protection. */
struct priority_protection_data
{
int priomax;
unsigned int priomap[];
};
/* Thread descriptor data structure. */
struct pthread
{
@ -343,6 +351,9 @@ struct pthread
/* This is what the user specified and what we will report. */
size_t reported_guardsize;
/* Thread Priority Protection data. */
struct priority_protection_data *tpp;
/* Resolver state. */
struct __res_state res;

32
nptl/pthreadP.h
View File

@ -86,17 +86,31 @@ enum
= PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_ERRORCHECK_NP,
PTHREAD_MUTEX_PI_ROBUST_ADAPTIVE_NP
= PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_ADAPTIVE_NP,
PTHREAD_MUTEX_PRIO_PROTECT_NP = 64
PTHREAD_MUTEX_PRIO_PROTECT_NP = 64,
PTHREAD_MUTEX_PP_NORMAL_NP
= PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_NORMAL,
PTHREAD_MUTEX_PP_RECURSIVE_NP
= PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_RECURSIVE_NP,
PTHREAD_MUTEX_PP_ERRORCHECK_NP
= PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_ERRORCHECK_NP,
PTHREAD_MUTEX_PP_ADAPTIVE_NP
= PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_ADAPTIVE_NP
};
#define PTHREAD_MUTEX_PRIO_CEILING_SHIFT 16
#define PTHREAD_MUTEX_PRIO_CEILING_MASK 0x00ff0000
/* Ceiling in __data.__lock. __data.__lock is signed, so don't
use the MSB bit in there, but in the mask also include that bit,
so that the compiler can optimize & PTHREAD_MUTEX_PRIO_CEILING_MASK
masking if the value is then shifted down by
PTHREAD_MUTEX_PRIO_CEILING_SHIFT. */
#define PTHREAD_MUTEX_PRIO_CEILING_SHIFT 19
#define PTHREAD_MUTEX_PRIO_CEILING_MASK 0xfff80000
/* Flags in mutex attr. */
#define PTHREAD_MUTEXATTR_PROTOCOL_SHIFT 28
#define PTHREAD_MUTEXATTR_PROTOCOL_MASK 0x30000000
#define PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT 16
#define PTHREAD_MUTEXATTR_PRIO_CEILING_MASK 0x00ff0000
#define PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT 12
#define PTHREAD_MUTEXATTR_PRIO_CEILING_MASK 0x00fff000
#define PTHREAD_MUTEXATTR_FLAG_ROBUST 0x40000000
#define PTHREAD_MUTEXATTR_FLAG_PSHARED 0x80000000
#define PTHREAD_MUTEXATTR_FLAG_BITS \
@ -151,6 +165,14 @@ extern unsigned int __nptl_nthreads attribute_hidden;
extern int __set_robust_list_avail attribute_hidden;
#endif
/* Thread Priority Protection. */
extern int __sched_fifo_min_prio attribute_hidden;
extern int __sched_fifo_max_prio attribute_hidden;
extern void __init_sched_fifo_prio (void) attribute_hidden;
extern int __pthread_tpp_change_priority (int prev_prio, int new_prio)
attribute_hidden;
extern int __pthread_current_priority (void) attribute_hidden;
/* The library can run in debugging mode where it performs a lot more
tests. */
extern int __pthread_debug attribute_hidden;

9
nptl/pthread_create.c
View File

@ -206,6 +206,15 @@ __free_tcb (struct pthread *pd)
running thread is gone. */
abort ();
/* Free TPP data. */
if (__builtin_expect (pd->tpp != NULL, 0))
{
struct priority_protection_data *tpp = pd->tpp;
pd->tpp = NULL;
free (tpp);
}
/* Queue the stack memory block for reuse and exit the process. The
kernel will signal via writing to the address returned by
QUEUE-STACK when the stack is available. */

7
nptl/pthread_mutex_getprioceiling.c
View File

@ -18,6 +18,7 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <pthreadP.h>
@ -26,7 +27,11 @@ pthread_mutex_getprioceiling (mutex, prioceiling)
const pthread_mutex_t *mutex;
int *prioceiling;
{
*prioceiling = (mutex->__data.__kind & PTHREAD_MUTEX_PRIO_CEILING_MASK)
if (__builtin_expect ((mutex->__data.__kind
& PTHREAD_MUTEX_PRIO_PROTECT_NP) == 0, 0))
return EINVAL;
*prioceiling = (mutex->__data.__lock & PTHREAD_MUTEX_PRIO_CEILING_MASK)
>> PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
return 0;

27
nptl/pthread_mutex_init.c
View File

@ -46,7 +46,6 @@ __pthread_mutex_init (mutex, mutexattr)
imutexattr = (const struct pthread_mutexattr *) mutexattr ?: &default_attr;
/* Sanity checks. */
// XXX For now we don't support priority protected mutexes.
switch (__builtin_expect (imutexattr->mutexkind
& PTHREAD_MUTEXATTR_PROTOCOL_MASK,
PTHREAD_PRIO_NONE
@ -72,7 +71,10 @@ __pthread_mutex_init (mutex, mutexattr)
break;
default:
return ENOTSUP;
/* XXX: For now we don't support robust priority protected mutexes. */
if (imutexattr->mutexkind & PTHREAD_MUTEXATTR_FLAG_ROBUST)
return ENOTSUP;
break;
}
/* Clear the whole variable. */
@ -100,15 +102,18 @@ __pthread_mutex_init (mutex, mutexattr)
case PTHREAD_PRIO_PROTECT << PTHREAD_MUTEXATTR_PROTOCOL_SHIFT:
mutex->__data.__kind |= PTHREAD_MUTEX_PRIO_PROTECT_NP;
if (PTHREAD_MUTEX_PRIO_CEILING_MASK
== PTHREAD_MUTEXATTR_PRIO_CEILING_MASK)
mutex->__data.__kind |= (imutexattr->mutexkind
& PTHREAD_MUTEXATTR_PRIO_CEILING_MASK);
else
mutex->__data.__kind |= ((imutexattr->mutexkind
& PTHREAD_MUTEXATTR_PRIO_CEILING_MASK)
>> PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT)
<< PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
int ceiling = (imutexattr->mutexkind
& PTHREAD_MUTEXATTR_PRIO_CEILING_MASK)
>> PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT;
if (! ceiling)
{
if (__sched_fifo_min_prio == -1)
__init_sched_fifo_prio ();
if (ceiling < __sched_fifo_min_prio)
ceiling = __sched_fifo_min_prio;
}
mutex->__data.__lock = ceiling << PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
break;
default:

84
nptl/pthread_mutex_lock.c
View File

@ -335,6 +335,90 @@ __pthread_mutex_lock (mutex)
}
break;
case PTHREAD_MUTEX_PP_RECURSIVE_NP:
case PTHREAD_MUTEX_PP_ERRORCHECK_NP:
case PTHREAD_MUTEX_PP_NORMAL_NP:
case PTHREAD_MUTEX_PP_ADAPTIVE_NP:
{
int kind = mutex->__data.__kind & PTHREAD_MUTEX_KIND_MASK_NP;
oldval = mutex->__data.__lock;
/* Check whether we already hold the mutex. */
if (mutex->__data.__owner == id)
{
if (kind == PTHREAD_MUTEX_ERRORCHECK_NP)
return EDEADLK;
if (kind == PTHREAD_MUTEX_RECURSIVE_NP)
{
/* Just bump the counter. */
if (__builtin_expect (mutex->__data.__count + 1 == 0, 0))
/* Overflow of the counter. */
return EAGAIN;
++mutex->__data.__count;
return 0;
}
}
int oldprio = -1, ceilval;
do
{
int ceiling = (oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK)
>> PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
if (__pthread_current_priority () > ceiling)
{
if (oldprio != -1)
__pthread_tpp_change_priority (oldprio, -1);
return EINVAL;
}
retval = __pthread_tpp_change_priority (oldprio, ceiling);
if (retval)
return retval;
ceilval = ceiling << PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
oldprio = ceiling;
oldval
= atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
#ifdef NO_INCR
ceilval | 2,
#else
ceilval | 1,
#endif
ceilval);
if (oldval == ceilval)
break;
do
{
oldval
= atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
ceilval | 2,
ceilval | 1);
if ((oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK) != ceilval)
break;
if (oldval != ceilval)
lll_futex_wait (&mutex->__data.__lock, ceilval | 2);
}
while (atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
ceilval | 2, ceilval)
!= ceilval);
}
while ((oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK) != ceilval);
assert (mutex->__data.__owner == 0);
mutex->__data.__count = 1;
}
break;
default:
/* Correct code cannot set any other type. */
return EINVAL;

81
nptl/pthread_mutex_setprioceiling.c
View File

@ -18,6 +18,7 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <stdbool.h>
#include <errno.h>
#include <pthreadP.h>
@ -33,23 +34,83 @@ pthread_mutex_setprioceiling (mutex, prioceiling, old_ceiling)
if ((mutex->__data.__kind & PTHREAD_MUTEX_PRIO_PROTECT_NP) == 0)
return EINVAL;
if (prioceiling < 0 || __builtin_expect (prioceiling > 255, 0))
if (__sched_fifo_min_prio == -1)
__init_sched_fifo_prio ();
if (__builtin_expect (prioceiling < __sched_fifo_min_prio, 0)
|| __builtin_expect (prioceiling > __sched_fifo_max_prio, 0)
|| __builtin_expect ((prioceiling
& (PTHREAD_MUTEXATTR_PRIO_CEILING_MASK
>> PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT))
!= prioceiling, 0))
return EINVAL;
/* XXX This needs to lock with TID, but shouldn't obey priority protect
protocol. */
/* lll_xxx_mutex_lock (mutex->__data.__lock); */
/* Check whether we already hold the mutex. */
bool locked = false;
if (mutex->__data.__owner == THREAD_GETMEM (THREAD_SELF, tid))
{
if (mutex->__data.__kind == PTHREAD_MUTEX_PP_ERRORCHECK_NP)
return EDEADLK;
if (mutex->__data.__kind == PTHREAD_MUTEX_PP_RECURSIVE_NP)
locked = true;
}
int oldval = mutex->__data.__lock;
if (! locked)
do
{
/* Need to lock the mutex, but without obeying the priority
protect protocol. */
int ceilval = (oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK);
oldval = atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
ceilval | 1, ceilval);
if (oldval == ceilval)
break;
do
{
oldval
= atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
ceilval | 2,
ceilval | 1);
if ((oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK) != ceilval)
break;
if (oldval != ceilval)
lll_futex_wait (&mutex->__data.__lock, ceilval | 2);
}
while (atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
ceilval | 2, ceilval)
!= ceilval);
if ((oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK) != ceilval)
continue;
}
while (0);
int oldprio = (oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK)
>> PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
if (locked)
{
int ret = __pthread_tpp_change_priority (oldprio, prioceiling);
if (ret)
return ret;
}
if (old_ceiling != NULL)
*old_ceiling = (mutex->__data.__kind & PTHREAD_MUTEX_PRIO_CEILING_MASK)
>> PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
*old_ceiling = oldprio;
int newkind = (mutex->__data.__kind & ~PTHREAD_MUTEX_PRIO_CEILING_MASK);
mutex->__data.__kind = newkind
int newlock = 0;
if (locked)
newlock = (mutex->__data.__lock & ~PTHREAD_MUTEX_PRIO_CEILING_MASK);
mutex->__data.__lock = newlock
| (prioceiling << PTHREAD_MUTEX_PRIO_CEILING_SHIFT);
atomic_full_barrier ();
/* XXX This needs to unlock the above special kind of lock. */
/* lll_xxx_mutex_unlock (mutex->__data.__lock); */
lll_futex_wake (&mutex->__data.__lock, INT_MAX);
return 0;
}

113
nptl/pthread_mutex_timedlock.c
View File

@ -340,6 +340,119 @@ pthread_mutex_timedlock (mutex, abstime)
}
break;
case PTHREAD_MUTEX_PP_RECURSIVE_NP:
case PTHREAD_MUTEX_PP_ERRORCHECK_NP:
case PTHREAD_MUTEX_PP_NORMAL_NP:
case PTHREAD_MUTEX_PP_ADAPTIVE_NP:
{
int kind = mutex->__data.__kind & PTHREAD_MUTEX_KIND_MASK_NP;
oldval = mutex->__data.__lock;
/* Check whether we already hold the mutex. */
if (mutex->__data.__owner == id)
{
if (kind == PTHREAD_MUTEX_ERRORCHECK_NP)
return EDEADLK;
if (kind == PTHREAD_MUTEX_RECURSIVE_NP)
{
/* Just bump the counter. */
if (__builtin_expect (mutex->__data.__count + 1 == 0, 0))
/* Overflow of the counter. */
return EAGAIN;
++mutex->__data.__count;
return 0;
}
}
int oldprio = -1, ceilval;
do
{
int ceiling = (oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK)
>> PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
if (__pthread_current_priority () > ceiling)
{
result = EINVAL;
failpp:
if (oldprio != -1)
__pthread_tpp_change_priority (oldprio, -1);
return result;
}
result = __pthread_tpp_change_priority (oldprio, ceiling);
if (result)
return result;
ceilval = ceiling << PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
oldprio = ceiling;
oldval
= atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
ceilval | 1, ceilval);
if (oldval == ceilval)
break;
do
{
oldval
= atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
ceilval | 2,
ceilval | 1);
if ((oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK) != ceilval)
break;
if (oldval != ceilval)
{
/* Reject invalid timeouts. */
if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000)
{
result = EINVAL;
goto failpp;
}
struct timeval tv;
struct timespec rt;
/* Get the current time. */
(void) __gettimeofday (&tv, NULL);
/* Compute relative timeout. */
rt.tv_sec = abstime->tv_sec - tv.tv_sec;
rt.tv_nsec = abstime->tv_nsec - tv.tv_usec * 1000;
if (rt.tv_nsec < 0)
{
rt.tv_nsec += 1000000000;
--rt.tv_sec;
}
/* Already timed out? */
if (rt.tv_sec < 0)
{
result = ETIMEDOUT;
goto failpp;
}
lll_futex_timed_wait (&mutex->__data.__lock,
ceilval | 2, &rt);
}
}
while (atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
ceilval | 2, ceilval)
!= ceilval);
}
while ((oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK) != ceilval);
assert (mutex->__data.__owner == 0);
mutex->__data.__count = 1;
}
break;
default:
/* Correct code cannot set any other type. */
return EINVAL;

73
nptl/pthread_mutex_trylock.c
View File

@ -297,6 +297,79 @@ __pthread_mutex_trylock (mutex)
return 0;
}
case PTHREAD_MUTEX_PP_RECURSIVE_NP:
case PTHREAD_MUTEX_PP_ERRORCHECK_NP:
case PTHREAD_MUTEX_PP_NORMAL_NP:
case PTHREAD_MUTEX_PP_ADAPTIVE_NP:
{
int kind = mutex->__data.__kind & PTHREAD_MUTEX_KIND_MASK_NP;
oldval = mutex->__data.__lock;
/* Check whether we already hold the mutex. */
if (mutex->__data.__owner == id)
{
if (kind == PTHREAD_MUTEX_ERRORCHECK_NP)
return EDEADLK;
if (kind == PTHREAD_MUTEX_RECURSIVE_NP)
{
/* Just bump the counter. */
if (__builtin_expect (mutex->__data.__count + 1 == 0, 0))
/* Overflow of the counter. */
return EAGAIN;
++mutex->__data.__count;
return 0;
}
}
int oldprio = -1, ceilval;
do
{
int ceiling = (oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK)
>> PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
if (__pthread_current_priority () > ceiling)
{
if (oldprio != -1)
__pthread_tpp_change_priority (oldprio, -1);
return EINVAL;
}
int retval = __pthread_tpp_change_priority (oldprio, ceiling);
if (retval)
return retval;
ceilval = ceiling << PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
oldprio = ceiling;
oldval
= atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
ceilval | 1, ceilval);
if (oldval == ceilval)
break;
}
while ((oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK) != ceilval);
if (oldval != ceilval)
{
__pthread_tpp_change_priority (oldprio, -1);
break;
}
assert (mutex->__data.__owner == 0);
/* Record the ownership. */
mutex->__data.__owner = id;
++mutex->__data.__nusers;
mutex->__data.__count = 1;
return 0;
}
break;
default:
/* Correct code cannot set any other type. */
return EINVAL;

43
nptl/pthread_mutex_unlock.c
View File

@ -202,6 +202,49 @@ __pthread_mutex_unlock_usercnt (mutex, decr)
THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
break;
case PTHREAD_MUTEX_PP_RECURSIVE_NP:
/* Recursive mutex. */
if (mutex->__data.__owner != THREAD_GETMEM (THREAD_SELF, tid))
return EPERM;
if (--mutex->__data.__count != 0)
/* We still hold the mutex. */
return 0;
goto pp;
case PTHREAD_MUTEX_PP_ERRORCHECK_NP:
/* Error checking mutex. */
if (mutex->__data.__owner != THREAD_GETMEM (THREAD_SELF, tid)
|| (mutex->__data.__lock & ~ PTHREAD_MUTEX_PRIO_CEILING_MASK) == 0)
return EPERM;
/* FALLTHROUGH */
case PTHREAD_MUTEX_PP_NORMAL_NP:
case PTHREAD_MUTEX_PP_ADAPTIVE_NP:
/* Always reset the owner field. */
pp:
mutex->__data.__owner = 0;
if (decr)
/* One less user. */
--mutex->__data.__nusers;
/* Unlock. */
int newval, oldval;
do
{
oldval = mutex->__data.__lock;
newval = oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK;
}
while (atomic_compare_and_exchange_bool_acq (&mutex->__data.__lock,
newval, oldval));
if ((oldval & ~PTHREAD_MUTEX_PRIO_CEILING_MASK) > 1)
lll_futex_wake (&mutex->__data.__lock, 1);
int oldprio = newval >> PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
return __pthread_tpp_change_priority (oldprio, -1);
default:
/* Correct code cannot set any other type. */
return EINVAL;

15
nptl/pthread_mutexattr_getprioceiling.c
View File

@ -27,11 +27,22 @@ pthread_mutexattr_getprioceiling (attr, prioceiling)
int *prioceiling;
{
const struct pthread_mutexattr *iattr;
int ceiling;
iattr = (const struct pthread_mutexattr *) attr;
*prioceiling = ((iattr->mutexkind & PTHREAD_MUTEXATTR_PRIO_CEILING_MASK)
>> PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT);
ceiling = ((iattr->mutexkind & PTHREAD_MUTEXATTR_PRIO_CEILING_MASK)
>> PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT);
if (! ceiling)
{
if (__sched_fifo_min_prio == -1)
__init_sched_fifo_prio ();
if (ceiling < __sched_fifo_min_prio)
ceiling = __sched_fifo_min_prio;
}
*prioceiling = ceiling;
return 0;
}

10
nptl/pthread_mutexattr_setprioceiling.c
View File

@ -27,7 +27,15 @@ pthread_mutexattr_setprioceiling (attr, prioceiling)
pthread_mutexattr_t *attr;
int prioceiling;
{
if (prioceiling < 0 || __builtin_expect (prioceiling > 255, 0))
if (__sched_fifo_min_prio == -1)
__init_sched_fifo_prio ();
if (__builtin_expect (prioceiling < __sched_fifo_min_prio, 0)
|| __builtin_expect (prioceiling > __sched_fifo_max_prio, 0)
|| __builtin_expect ((prioceiling
& (PTHREAD_MUTEXATTR_PRIO_CEILING_MASK
>> PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT))
!= prioceiling, 0))
return EINVAL;
struct pthread_mutexattr *iattr = (struct pthread_mutexattr *) attr;

17
nptl/pthread_setschedparam.c
View File

@ -1,4 +1,4 @@
/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
/* Copyright (C) 2002, 2003, 2004, 2006 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
@ -45,6 +45,19 @@ __pthread_setschedparam (threadid, policy, param)
lll_lock (pd->lock);
struct sched_param p;
const struct sched_param *orig_param = param;
/* If the thread should have higher priority because of some
PTHREAD_PRIO_PROTECT mutexes it holds, adjust the priority. */
if (__builtin_expect (pd->tpp != NULL, 0)
&& pd->tpp->priomax > param->sched_priority)
{
p = *param;
p.sched_priority = pd->tpp->priomax;
param = &p;
}
/* Try to set the scheduler information. */
if (__builtin_expect (__sched_setscheduler (pd->tid, policy,
param) == -1, 0))
@ -54,7 +67,7 @@ __pthread_setschedparam (threadid, policy, param)
/* We succeeded changing the kernel information. Reflect this
change in the thread descriptor. */
pd->schedpolicy = policy;
memcpy (&pd->schedparam, param, sizeof (struct sched_param));
memcpy (&pd->schedparam, orig_param, sizeof (struct sched_param));
pd->flags |= ATTR_FLAG_SCHED_SET | ATTR_FLAG_POLICY_SET;
}

6
nptl/pthread_setschedprio.c
View File

@ -47,6 +47,11 @@ pthread_setschedprio (threadid, prio)
lll_lock (pd->lock);
/* If the thread should have higher priority because of some
PTHREAD_PRIO_PROTECT mutexes it holds, adjust the priority. */
if (__builtin_expect (pd->tpp != NULL, 0) && pd->tpp->priomax > prio)
param.sched_priority = pd->tpp->priomax;
/* Try to set the scheduler information. */
if (__builtin_expect (sched_setparam (pd->tid, &param) == -1, 0))
result = errno;
@ -54,6 +59,7 @@ pthread_setschedprio (threadid, prio)
{
/* We succeeded changing the kernel information. Reflect this
change in the thread descriptor. */
param.sched_priority = prio;
memcpy (&pd->schedparam, &param, sizeof (struct sched_param));
pd->flags |= ATTR_FLAG_SCHED_SET;
}

7
nptl/sysdeps/unix/sysv/linux/bits/posix_opt.h
View File

@ -82,6 +82,10 @@
/* We support priority inheritence. */
#define _POSIX_THREAD_PRIO_INHERIT 200112L
/* We support priority protection, though only for non-robust
mutexes. */
#define _POSIX_THREAD_PRIO_PROTECT 200112L
/* We support POSIX.1b semaphores. */
#define _POSIX_SEMAPHORES 200112L
@ -174,7 +178,4 @@
/* Typed memory objects are not available. */
#define _POSIX_TYPED_MEMORY_OBJECTS -1
/* No support for priority protection so far. */
#define _POSIX_THREAD_PRIO_PROTECT -1
#endif /* posix_opt.h */

172
nptl/tpp.c Normal file
View File

@ -0,0 +1,172 @@
/* Thread Priority Protect helpers.
Copyright (C) 2006 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jakub Jelinek <jakub@redhat.com>, 2006.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <assert.h>
#include <atomic.h>
#include <errno.h>
#include <pthreadP.h>
#include <sched.h>
#include <stdlib.h>
int __sched_fifo_min_prio = -1;
int __sched_fifo_max_prio = -1;
void
__init_sched_fifo_prio (void)
{
__sched_fifo_max_prio = sched_get_priority_max (SCHED_FIFO);
atomic_write_barrier ();
__sched_fifo_min_prio = sched_get_priority_min (SCHED_FIFO);
}
int
__pthread_tpp_change_priority (int previous_prio, int new_prio)
{
struct pthread *self = THREAD_SELF;
struct priority_protection_data *tpp = THREAD_GETMEM (self, tpp);
if (tpp == NULL)
{
if (__sched_fifo_min_prio == -1)
__init_sched_fifo_prio ();
size_t size = sizeof *tpp;
size += (__sched_fifo_max_prio - __sched_fifo_min_prio + 1)
* sizeof (tpp->priomap[0]);
tpp = calloc (size, 1);
if (tpp == NULL)
return ENOMEM;
tpp->priomax = __sched_fifo_min_prio - 1;
THREAD_SETMEM (self, tpp, tpp);
}
assert (new_prio == -1
|| (new_prio >= __sched_fifo_min_prio
&& new_prio <= __sched_fifo_max_prio));
assert (previous_prio == -1
|| (previous_prio >= __sched_fifo_min_prio
&& previous_prio <= __sched_fifo_max_prio));
int priomax = tpp->priomax;
int newpriomax = priomax;
if (new_prio != -1)
{
if (tpp->priomap[new_prio - __sched_fifo_min_prio] + 1 == 0)
return EAGAIN;
++tpp->priomap[new_prio - __sched_fifo_min_prio];
if (new_prio > priomax)
newpriomax = new_prio;
}
if (previous_prio != -1)
{
if (--tpp->priomap[previous_prio - __sched_fifo_min_prio] == 0
&& priomax == previous_prio
&& previous_prio > new_prio)
{
int i;
for (i = previous_prio - 1; i >= __sched_fifo_min_prio; --i)
if (tpp->priomap[i - __sched_fifo_min_prio])
break;
newpriomax = i;
}
}
if (priomax == newpriomax)
return 0;
lll_lock (self->lock);
tpp->priomax = newpriomax;
int result = 0;
if ((self->flags & ATTR_FLAG_SCHED_SET) == 0)
{
if (__sched_getparam (self->tid, &self->schedparam) != 0)
result = errno;
else
self->flags |= ATTR_FLAG_SCHED_SET;
}
if ((self->flags & ATTR_FLAG_POLICY_SET) == 0)
{
self->schedpolicy = __sched_getscheduler (self->tid);
if (self->schedpolicy == -1)
result = errno;
else
self->flags |= ATTR_FLAG_POLICY_SET;
}
if (result == 0)
{
struct sched_param sp = self->schedparam;
if (sp.sched_priority < newpriomax || sp.sched_priority < priomax)
{
if (sp.sched_priority < newpriomax)
sp.sched_priority = newpriomax;
if (__sched_setscheduler (self->tid, self->schedpolicy, &sp) < 0)
result = errno;
}
}
lll_unlock (self->lock);
return result;
}
int
__pthread_current_priority (void)
{
struct pthread *self = THREAD_SELF;
if ((self->flags & (ATTR_FLAG_POLICY_SET | ATTR_FLAG_SCHED_SET))
== (ATTR_FLAG_POLICY_SET | ATTR_FLAG_SCHED_SET))
return self->schedparam.sched_priority;
int result = 0;
lll_lock (self->lock);
if ((self->flags & ATTR_FLAG_SCHED_SET) == 0)
{
if (__sched_getparam (self->tid, &self->schedparam) != 0)
result = -1;
else
self->flags |= ATTR_FLAG_SCHED_SET;
}
if ((self->flags & ATTR_FLAG_POLICY_SET) == 0)
{
self->schedpolicy = __sched_getscheduler (self->tid);
if (self->schedpolicy == -1)
result = -1;
else
self->flags |= ATTR_FLAG_POLICY_SET;
}
if (result != -1)
result = self->schedparam.sched_priority;
lll_unlock (self->lock);
return result;
}

4
nptl/tst-mutex1.c
View File

@ -71,5 +71,7 @@ do_test (void)
return 0;
}
#define TEST_FUNCTION do_test ()
#ifndef TEST_FUNCTION
# define TEST_FUNCTION do_test ()
#endif
#include "../test-skeleton.c"

4
nptl/tst-mutex6.c
View File

@ -69,5 +69,7 @@ do_test (void)
}
#define EXPECTED_SIGNAL SIGALRM
#define TEST_FUNCTION do_test ()
#ifndef TEST_FUNCTION
# define TEST_FUNCTION do_test ()
#endif
#include "../test-skeleton.c"

45
nptl/tst-mutexpp1.c Normal file
View File

@ -0,0 +1,45 @@
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include "tst-tpp.h"
static pthread_mutexattr_t a;
static void
prepare (void)
{
init_tpp_test ();
if (pthread_mutexattr_init (&a) != 0)
{
puts ("mutexattr_init failed");
exit (1);
}
if (pthread_mutexattr_setprotocol (&a, PTHREAD_PRIO_PROTECT) != 0)
{
puts ("mutexattr_setprotocol failed");
exit (1);
}
if (pthread_mutexattr_setprioceiling (&a, 6) != 0)
{
puts ("mutexattr_setprioceiling failed");
exit (1);
}
}
#define PREPARE(argc, argv) prepare ()
static int do_test (void);
static int
do_test_wrapper (void)
{
init_tpp_test ();
return do_test ();
}
#define TEST_FUNCTION do_test_wrapper ()
#define ATTR &a
#include "tst-mutex1.c"

334
nptl/tst-mutexpp10.c Normal file
View File

@ -0,0 +1,334 @@
/* Copyright (C) 2006 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jakub Jelinek <jakub@redhat.com>, 2006.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <limits.h>
#include <pthread.h>
#include <sched.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "tst-tpp.h"
static int
do_test (void)
{
int ret = 0;
init_tpp_test ();
pthread_mutexattr_t ma;
if (pthread_mutexattr_init (&ma))
{
puts ("mutexattr_init failed");
return 1;
}
if (pthread_mutexattr_setprotocol (&ma, PTHREAD_PRIO_PROTECT))
{
puts ("mutexattr_setprotocol failed");
return 1;
}
int prioceiling;
if (pthread_mutexattr_getprioceiling (&ma, &prioceiling))
{
puts ("mutexattr_getprioceiling failed");
return 1;
}
if (prioceiling < fifo_min || prioceiling > fifo_max)
{
printf ("prioceiling %d not in %d..%d range\n",
prioceiling, fifo_min, fifo_max);
return 1;
}
if (fifo_max < INT_MAX
&& pthread_mutexattr_setprioceiling (&ma, fifo_max + 1) != EINVAL)
{
printf ("mutexattr_setprioceiling %d did not fail with EINVAL\n",
fifo_max + 1);
return 1;
}
if (fifo_min > 0
&& pthread_mutexattr_setprioceiling (&ma, fifo_min - 1) != EINVAL)
{
printf ("mutexattr_setprioceiling %d did not fail with EINVAL\n",
fifo_min - 1);
return 1;
}
if (pthread_mutexattr_setprioceiling (&ma, fifo_min))
{
puts ("mutexattr_setprioceiling failed");
return 1;
}
if (pthread_mutexattr_setprioceiling (&ma, fifo_max))
{
puts ("mutexattr_setprioceiling failed");
return 1;
}
if (pthread_mutexattr_setprioceiling (&ma, 6))
{
puts ("mutexattr_setprioceiling failed");
return 1;
}
if (pthread_mutexattr_getprioceiling (&ma, &prioceiling))
{
puts ("mutexattr_getprioceiling failed");
return 1;
}
if (prioceiling != 6)
{
printf ("mutexattr_getprioceiling returned %d != 6\n",
prioceiling);
return 1;
}
pthread_mutex_t m1, m2, m3;
int e = pthread_mutex_init (&m1, &ma);
if (e == ENOTSUP)
{
puts ("cannot support selected type of mutexes");
return 0;
}
else if (e != 0)
{
puts ("mutex_init failed");
return 1;
}
if (pthread_mutexattr_setprioceiling (&ma, 8))
{
puts ("mutexattr_setprioceiling failed");
return 1;
}
if (pthread_mutex_init (&m2, &ma))
{
puts ("mutex_init failed");
return 1;
}
if (pthread_mutexattr_setprioceiling (&ma, 5))
{
puts ("mutexattr_setprioceiling failed");
return 1;
}
if (pthread_mutex_init (&m3, &ma))
{
puts ("mutex_init failed");
return 1;
}
CHECK_TPP_PRIORITY (4, 4);
if (pthread_mutex_lock (&m1) != 0)
{
puts ("mutex_lock failed");
return 1;
}
CHECK_TPP_PRIORITY (4, 6);
if (pthread_mutex_trylock (&m2) != 0)
{
puts ("mutex_lock failed");
return 1;
}
CHECK_TPP_PRIORITY (4, 8);
if (pthread_mutex_lock (&m3) != 0)
{
puts ("mutex_lock failed");
return 1;
}
CHECK_TPP_PRIORITY (4, 8);
if (pthread_mutex_unlock (&m2) != 0)
{
puts ("mutex_unlock failed");
return 1;
}
CHECK_TPP_PRIORITY (4, 6);
if (pthread_mutex_unlock (&m1) != 0)
{
puts ("mutex_unlock failed");
return 1;
}
CHECK_TPP_PRIORITY (4, 5);
if (pthread_mutex_lock (&m2) != 0)
{
puts ("mutex_lock failed");
return 1;
}
CHECK_TPP_PRIORITY (4, 8);
if (pthread_mutex_unlock (&m2) != 0)
{
puts ("mutex_unlock failed");
return 1;
}
CHECK_TPP_PRIORITY (4, 5);
if (pthread_mutex_getprioceiling (&m1, &prioceiling))
{
puts ("mutex_getprioceiling m1 failed");
return 1;
}
else if (prioceiling != 6)
{
printf ("unexpected m1 prioceiling %d != 6\n", prioceiling);
return 1;
}
if (pthread_mutex_getprioceiling (&m2, &prioceiling))
{
puts ("mutex_getprioceiling m2 failed");
return 1;
}
else if (prioceiling != 8)
{
printf ("unexpected m2 prioceiling %d != 8\n", prioceiling);
return 1;
}
if (pthread_mutex_getprioceiling (&m3, &prioceiling))
{
puts ("mutex_getprioceiling m3 failed");
return 1;
}
else if (prioceiling != 5)
{
printf ("unexpected m3 prioceiling %d != 5\n", prioceiling);
return 1;
}
if (pthread_mutex_setprioceiling (&m1, 7, &prioceiling))
{
printf ("mutex_setprioceiling failed");
return 1;
}
else if (prioceiling != 6)
{
printf ("unexpected m1 old prioceiling %d != 6\n", prioceiling);
return 1;
}
if (pthread_mutex_getprioceiling (&m1, &prioceiling))
{
puts ("mutex_getprioceiling m1 failed");
return 1;
}
else if (prioceiling != 7)
{
printf ("unexpected m1 prioceiling %d != 7\n", prioceiling);
return 1;
}
CHECK_TPP_PRIORITY (4, 5);
if (pthread_mutex_unlock (&m3) != 0)
{
puts ("mutex_unlock failed");
return 1;
}
CHECK_TPP_PRIORITY (4, 4);
if (pthread_mutex_trylock (&m1) != 0)
{
puts ("mutex_lock failed");
return 1;
}
CHECK_TPP_PRIORITY (4, 7);
struct sched_param sp;
memset (&sp, 0, sizeof (sp));
sp.sched_priority = 8;
if (pthread_setschedparam (pthread_self (), SCHED_FIFO, &sp))
{
puts ("cannot set scheduling params");
return 1;
}
CHECK_TPP_PRIORITY (8, 8);
if (pthread_mutex_unlock (&m1) != 0)
{
puts ("mutex_unlock failed");
return 1;
}
CHECK_TPP_PRIORITY (8, 8);
if (pthread_mutex_lock (&m3) != EINVAL)
{
puts ("pthread_mutex_lock didn't fail with EINVAL");
return 1;
}
CHECK_TPP_PRIORITY (8, 8);
if (pthread_mutex_destroy (&m1) != 0)
{
puts ("mutex_destroy failed");
return 1;
}
if (pthread_mutex_destroy (&m2) != 0)
{
puts ("mutex_destroy failed");
return 1;
}
if (pthread_mutex_destroy (&m3) != 0)
{
puts ("mutex_destroy failed");
return 1;
}
if (pthread_mutexattr_destroy (&ma) != 0)
{
puts ("mutexattr_destroy failed");
return 1;
}
return ret;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"

45
nptl/tst-mutexpp6.c Normal file
View File

@ -0,0 +1,45 @@
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include "tst-tpp.h"
static pthread_mutexattr_t a;
static void
prepare (void)
{
init_tpp_test ();
if (pthread_mutexattr_init (&a) != 0)
{
puts ("mutexattr_init failed");
exit (1);
}
if (pthread_mutexattr_setprotocol (&a, PTHREAD_PRIO_PROTECT) != 0)
{
puts ("mutexattr_setprotocol failed");
exit (1);
}
if (pthread_mutexattr_setprioceiling (&a, 6) != 0)
{
puts ("mutexattr_setprioceiling failed");
exit (1);
}
}
#define PREPARE(argc, argv) prepare ()
static int do_test (void);
static int
do_test_wrapper (void)
{
init_tpp_test ();
return do_test ();
}
#define TEST_FUNCTION do_test_wrapper ()
#define ATTR &a
#include "tst-mutex6.c"

94
nptl/tst-tpp.h Normal file
View File

@ -0,0 +1,94 @@
/* Copyright (C) 2006 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jakub Jelinek <jakub@redhat.com>, 2006.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <pthread.h>
#include <sched.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/syscall.h>
/* This test is Linux specific. */
#define CHECK_TPP_PRIORITY(normal, boosted) \
do \
{ \
pid_t tid = syscall (__NR_gettid); \
\
struct sched_param cep_sp; \
int cep_policy; \
if (pthread_getschedparam (pthread_self (), &cep_policy, \
&cep_sp) != 0) \
{ \
puts ("getschedparam failed"); \
ret = 1; \
} \
else if (cep_sp.sched_priority != (normal)) \
{ \
printf ("unexpected priority %d != %d\n", \
cep_sp.sched_priority, (normal)); \
} \
if (syscall (__NR_sched_getparam, tid, &cep_sp) == 0 \
&& cep_sp.sched_priority != (boosted)) \
{ \
printf ("unexpected boosted priority %d != %d\n", \
cep_sp.sched_priority, (boosted)); \
ret = 1; \
} \
} \
while (0)
int fifo_min, fifo_max;
void
init_tpp_test (void)
{
fifo_min = sched_get_priority_min (SCHED_FIFO);
if (fifo_min < 0)
{
printf ("couldn't get min priority for SCHED_FIFO: %m\n");
exit (1);
}
fifo_max = sched_get_priority_max (SCHED_FIFO);
if (fifo_max < 0)
{
printf ("couldn't get max priority for SCHED_FIFO: %m\n");
exit (1);
}
if (fifo_min > 4 || fifo_max < 10)
{
printf ("%d..%d SCHED_FIFO priority interval not suitable for this test\n",
fifo_min, fifo_max);
exit (0);
}
struct sched_param sp;
memset (&sp, 0, sizeof (sp));
sp.sched_priority = 4;
int e = pthread_setschedparam (pthread_self (), SCHED_FIFO, &sp);
if (e != 0)
{
errno = e;
printf ("cannot set scheduling params: %m\n");
exit (0);
}
}

14
sysdeps/powerpc/powerpc32/dl-trampoline.S
View File

@ -40,8 +40,9 @@ _dl_runtime_resolve:
mflr r0
# We also need to save some of the condition register fields
stw r7,32(r1)
stw r0,68(r1)
cfi_offset (lr, 4)
# Don't clobber the caller's LRSAVE, it is needed by _mcount.
stw r0,48(r1)
cfi_offset (lr, -16)
stw r8,36(r1)
mfcr r0
stw r9,40(r1)
@ -51,7 +52,7 @@ _dl_runtime_resolve:
# 'fixup' returns the address we want to branch to.
mtctr r3
# Put the registers back...
lwz r0,68(r1)
lwz r0,48(r1)
lwz r10,44(r1)
lwz r9,40(r1)
mtlr r0
@ -128,8 +129,9 @@ _dl_prof_resolve:
mflr r5
# We also need to save some of the condition register fields.
stw r7,32(r1)
stw r5,324(r1)
cfi_offset (lr, 4)
# Don't clobber the caller's LRSAVE, it is needed by _mcount.
stw r5,308(r1)
cfi_offset (lr, -12)
stw r8,36(r1)
mfcr r0
stw r9,40(r1)
@ -154,7 +156,7 @@ _dl_prof_resolve:
# 'fixup' returns the address we want to branch to.
mtctr r3
# Put the registers back...
lwz r0,324(r1)
lwz r0,308(r1)
lwz r10,44(r1)
lwz r9,40(r1)
mtlr r0