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htl: Implement some support for TLS_DTV_AT_TP
Signed-off-by: Sergey Bugaev <bugaevc@gmail.com> Message-ID: <20240323173301.151066-19-bugaevc@gmail.com>
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@ -177,7 +177,9 @@ __pthread_create_internal (struct __pthread **thread,
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err = ENOMEM;
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goto failed_thread_tls_alloc;
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}
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#if TLS_TCB_AT_TP
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pthread->tcb->tcb = pthread->tcb;
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#endif
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/* And initialize the rest of the machine context. This may include
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additional machine- and system-specific initializations that
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@ -20,6 +20,18 @@
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#include <pthread.h>
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#include <htl/pt-internal.h>
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static inline int *
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thread_gscope_flag (struct __pthread *t)
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{
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#if TLS_TCB_AT_TP
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return &t->tcb->gscope_flag;
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#elif TLS_DTV_AT_TP
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return &((tcbprehead_t *) t->tcb - 1)->gscope_flag;
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#else
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# error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined"
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#endif
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}
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void
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__thread_gscope_wait (void)
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{
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@ -33,10 +45,10 @@ __thread_gscope_wait (void)
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for (i = 0; i < GL (dl_pthread_num_threads); ++i)
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{
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t = GL (dl_pthread_threads[i]);
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if (t == NULL || t->tcb->gscope_flag == THREAD_GSCOPE_FLAG_UNUSED)
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if (t == NULL || *thread_gscope_flag (t) == THREAD_GSCOPE_FLAG_UNUSED)
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continue;
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gscope_flagp = &t->tcb->gscope_flag;
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gscope_flagp = thread_gscope_flag (t);
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/* We have to wait until this thread is done with the global
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scope. First tell the thread that we are waiting and
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@ -100,7 +100,16 @@ _init_routine (void *stack)
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to the new stack. Pretend it wasn't allocated so that it remains
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valid if the main thread terminates. */
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thread->stack = 0;
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#if TLS_TCB_AT_TP
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thread->tcb = THREAD_SELF;
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#elif TLS_DTV_AT_TP
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/* Assuming THREAD_SELF is implemented as subtracting TLS_PRE_TCB_SIZE
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from the value of a thread pointer regsiter, this should optimize
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down to simply reading that register. */
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thread->tcb = (tcbhead_t *) (((char *) THREAD_SELF) + TLS_PRE_TCB_SIZE);
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#else
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# error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined"
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#endif
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#ifndef PAGESIZE
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__pthread_default_attr.__guardsize = __vm_page_size;
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