Arm bits for libpthread. It has no chances to work and should be considered

as stubs.

2 files changed, 294 insertions, 0 deletions

diff --git a/lib/libkse/arch/arm/include/atomic_ops.h b/lib/libkse/arch/arm/include/atomic_ops.h
new file mode 100644
index 0000000..e36a6bf
--- /dev/null
+++ b/lib/libkse/arch/arm/include/atomic_ops.h
@@ -0,0 +1,51 @@
+/*-
+ * Copyright (c) 2001 Daniel Eischen <deischen@FreeBSD.org>
+ * 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. Neither the name of the author nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef	_ATOMIC_OPS_H_
+#define	_ATOMIC_OPS_H_
+
+/*
+ * Atomic swap:
+ *   Atomic (tmp = *dst, *dst = val), then *res = tmp
+ *
+ * void atomic_swap32(intptr_t *dst, intptr_t val, intptr_t *res);
+ */
+static inline void
+atomic_swap32(intptr_t *dst, intptr_t val, intptr_t *res)
+{
+	__asm __volatile(
+	"swp %2, %2, [%1]; mov %2, %0"
+	 : "=r" (*res) : "r" (dst), "r" (val) : "cc");
+}
+
+#define	atomic_swap_ptr(d, v, r) \
+	atomic_swap32((intptr_t *)d, (intptr_t)v, (intptr_t *)r)
+
+#define	atomic_swap_int(d, v, r) \
+	atomic_swap32((intptr_t *)d, (intptr_t)v, (intptr_t *)r)
+#endif
diff --git a/lib/libkse/arch/arm/include/pthread_md.h b/lib/libkse/arch/arm/include/pthread_md.h
new file mode 100644
index 0000000..107eb03
--- /dev/null
+++ b/lib/libkse/arch/arm/include/pthread_md.h
@@ -0,0 +1,243 @@
+/*-
+ * Copyright (c) 2003 Jake Burkholder <jake@freebsd.org>.
+ * Copyright (c) 2003 Marcel Moolenaar
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * Machine-dependent thread prototypes/definitions for the thread kernel.
+ */
+#ifndef _PTHREAD_MD_H_
+#define	_PTHREAD_MD_H_
+
+#include <sys/kse.h>
+#include <stddef.h>
+#include <ucontext.h>
+
+#define	KSE_STACKSIZE		16384
+
+int _thr_setcontext(mcontext_t *, intptr_t, intptr_t *);
+int _thr_getcontext(mcontext_t *);
+
+#define	THR_GETCONTEXT(ucp)	_thr_getcontext(&(ucp)->uc_mcontext)
+#define	THR_SETCONTEXT(ucp)	_thr_setcontext(&(ucp)->uc_mcontext, 0, NULL)
+
+#define	PER_THREAD
+
+struct kcb;
+struct kse;
+struct pthread;
+struct tcb;
+struct tdv;	/* We don't know what this is yet? */
+
+
+/*
+ * %r6 points to one of these. We define the static TLS as an array
+ * of long double to enforce 16-byte alignment of the TLS memory.
+ *
+ * XXX - Both static and dynamic allocation of any of these structures
+ *       will result in a valid, well-aligned thread pointer???
+ */
+struct arm_tp {
+	struct tdv		*tp_tdv;	/* dynamic TLS */
+	uint32_t		_reserved_;
+	long double		tp_tls[0];	/* static TLS */
+};
+
+struct tcb {
+	struct pthread		*tcb_thread;
+	void			*tcb_addr;	/* allocated tcb address */
+	struct kcb		*tcb_curkcb;
+	uint32_t		tcb_isfake;
+	uint32_t		tcb_spare[4];
+	struct kse_thr_mailbox	tcb_tmbx;	/* needs 32-byte alignment */
+	struct arm_tp		tcb_tp;
+} __aligned(32);
+
+struct kcb {
+	struct kse_mailbox	kcb_kmbx;
+	struct tcb		kcb_faketcb;
+	struct tcb		*kcb_curtcb;
+	struct kse		*kcb_kse;
+};
+
+register struct arm_tp *_tp __asm("%r6");
+
+#define	_tcb	((struct tcb*)((char*)(_tp) - offsetof(struct tcb, tcb_tp)))
+
+/*
+ * The kcb and tcb constructors.
+ */
+struct tcb	*_tcb_ctor(struct pthread *);
+void		_tcb_dtor(struct tcb *);
+struct kcb	*_kcb_ctor(struct kse *kse);
+void		_kcb_dtor(struct kcb *);
+
+/* Called from the KSE to set its private data. */
+static __inline void
+_kcb_set(struct kcb *kcb)
+{
+	/* There is no thread yet; use the fake tcb. */
+	_tp = &kcb->kcb_faketcb.tcb_tp;
+}
+
+/*
+ * Get the current kcb.
+ *
+ * This can only be called while in a critical region; don't
+ * worry about having the kcb changed out from under us.
+ */
+static __inline struct kcb *
+_kcb_get(void)
+{
+	return (_tcb->tcb_curkcb);
+}
+
+/*
+ * Enter a critical region.
+ *
+ * Read and clear km_curthread in the kse mailbox.
+ */
+static __inline struct kse_thr_mailbox *
+_kcb_critical_enter(void)
+{
+	struct kse_thr_mailbox *crit;
+	uint32_t flags;
+
+	if (_tcb->tcb_isfake != 0) {
+		/*
+		 * We already are in a critical region since
+		 * there is no current thread.
+		 */
+		crit = NULL;
+	} else {
+		flags = _tcb->tcb_tmbx.tm_flags;
+		_tcb->tcb_tmbx.tm_flags |= TMF_NOUPCALL;
+		crit = _tcb->tcb_curkcb->kcb_kmbx.km_curthread;
+		_tcb->tcb_curkcb->kcb_kmbx.km_curthread = NULL;
+		_tcb->tcb_tmbx.tm_flags = flags;
+	}
+	return (crit);
+}
+
+static __inline void
+_kcb_critical_leave(struct kse_thr_mailbox *crit)
+{
+	/* No need to do anything if this is a fake tcb. */
+	if (_tcb->tcb_isfake == 0)
+		_tcb->tcb_curkcb->kcb_kmbx.km_curthread = crit;
+}
+
+static __inline int
+_kcb_in_critical(void)
+{
+	uint32_t flags;
+	int ret;
+
+	if (_tcb->tcb_isfake != 0) {
+		/*
+		 * We are in a critical region since there is no
+		 * current thread.
+		 */
+		ret = 1;
+	} else {
+		flags = _tcb->tcb_tmbx.tm_flags;
+		_tcb->tcb_tmbx.tm_flags |= TMF_NOUPCALL;
+		ret = (_tcb->tcb_curkcb->kcb_kmbx.km_curthread == NULL);
+		_tcb->tcb_tmbx.tm_flags = flags;
+	}
+	return (ret);
+}
+
+static __inline void
+_tcb_set(struct kcb *kcb, struct tcb *tcb)
+{
+	if (tcb == NULL)
+		tcb = &kcb->kcb_faketcb;
+	kcb->kcb_curtcb = tcb;
+	tcb->tcb_curkcb = kcb;
+	_tp = &tcb->tcb_tp;
+}
+
+static __inline struct tcb *
+_tcb_get(void)
+{
+	return (_tcb);
+}
+
+static __inline struct pthread *
+_get_curthread(void)
+{
+	return (_tcb->tcb_thread);
+}
+
+/*
+ * Get the current kse.
+ *
+ * Like _kcb_get(), this can only be called while in a critical region.
+ */
+static __inline struct kse *
+_get_curkse(void)
+{
+	return (_tcb->tcb_curkcb->kcb_kse);
+}
+
+void _arm_enter_uts(kse_func_t uts, struct kse_mailbox *km, void *stack,
+    size_t stacksz);
+
+static __inline int
+_thread_enter_uts(struct tcb *tcb, struct kcb *kcb)
+{
+	if (_thr_getcontext(&tcb->tcb_tmbx.tm_context.uc_mcontext) == 0) {
+		/* Make the fake tcb the current thread. */
+		kcb->kcb_curtcb = &kcb->kcb_faketcb;
+		_tp = &kcb->kcb_faketcb.tcb_tp;
+		_arm_enter_uts(kcb->kcb_kmbx.km_func, &kcb->kcb_kmbx,
+		    kcb->kcb_kmbx.km_stack.ss_sp,
+		    kcb->kcb_kmbx.km_stack.ss_size);
+		/* We should not reach here. */
+		return (-1);
+	}
+	return (0);
+}
+
+static __inline int
+_thread_switch(struct kcb *kcb, struct tcb *tcb, int setmbox)
+{
+	mcontext_t *mc;
+
+	_tcb_set(kcb, tcb);
+	mc = &tcb->tcb_tmbx.tm_context.uc_mcontext;
+	if (setmbox)
+		_thr_setcontext(mc, (intptr_t)&tcb->tcb_tmbx,
+		    (intptr_t *)&kcb->kcb_kmbx.km_curthread);
+	else
+		_thr_setcontext(mc, 0, NULL);
+	/* We should not reach here. */
+	return (-1);
+}
+
+#endif /* _PTHREAD_MD_H_ */