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htl: Implement some support for TLS_DTV_AT_TP

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Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
Message-ID: <20240323173301.151066-19-bugaevc@gmail.com>
This commit is contained in:
Sergey Bugaev 2024-03-23 20:32:59 +03:00 committed by Samuel Thibault
parent a4273efa21
commit dc1a77269c
3 changed files with 25 additions and 2 deletions
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2
htl/pt-create.c
View File

@ -177,7 +177,9 @@ __pthread_create_internal (struct __pthread **thread,
err = ENOMEM;
goto failed_thread_tls_alloc;
}
#if TLS_TCB_AT_TP
pthread->tcb->tcb = pthread->tcb;
#endif
/* And initialize the rest of the machine context. This may include
additional machine- and system-specific initializations that

16
sysdeps/htl/dl-thread_gscope_wait.c
View File

@ -20,6 +20,18 @@
#include <pthread.h>
#include <htl/pt-internal.h>
static inline int *
thread_gscope_flag (struct __pthread *t)
{
#if TLS_TCB_AT_TP
return &t->tcb->gscope_flag;
#elif TLS_DTV_AT_TP
return &((tcbprehead_t *) t->tcb - 1)->gscope_flag;
#else
# error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined"
#endif
}
void
__thread_gscope_wait (void)
{
@ -33,10 +45,10 @@ __thread_gscope_wait (void)
for (i = 0; i < GL (dl_pthread_num_threads); ++i)
{
t = GL (dl_pthread_threads[i]);
if (t == NULL || t->tcb->gscope_flag == THREAD_GSCOPE_FLAG_UNUSED)
if (t == NULL || *thread_gscope_flag (t) == THREAD_GSCOPE_FLAG_UNUSED)
continue;
gscope_flagp = &t->tcb->gscope_flag;
gscope_flagp = thread_gscope_flag (t);
/* We have to wait until this thread is done with the global
scope. First tell the thread that we are waiting and

9
sysdeps/mach/hurd/htl/pt-sysdep.c
View File

@ -100,7 +100,16 @@ _init_routine (void *stack)
to the new stack. Pretend it wasn't allocated so that it remains
valid if the main thread terminates. */
thread->stack = 0;
#if TLS_TCB_AT_TP
thread->tcb = THREAD_SELF;
#elif TLS_DTV_AT_TP
/* Assuming THREAD_SELF is implemented as subtracting TLS_PRE_TCB_SIZE
from the value of a thread pointer regsiter, this should optimize
down to simply reading that register. */
thread->tcb = (tcbhead_t *) (((char *) THREAD_SELF) + TLS_PRE_TCB_SIZE);
#else
# error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined"
#endif
#ifndef PAGESIZE
__pthread_default_attr.__guardsize = __vm_page_size;