metag: Add NPTL support

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

12 files changed, 420 insertions, 0 deletions

diff --git a/libpthread/nptl/sysdeps/metag/Makefile.arch b/libpthread/nptl/sysdeps/metag/Makefile.arch
new file mode 100644
index 000000000..0a42e686a
--- /dev/null
+++ b/libpthread/nptl/sysdeps/metag/Makefile.arch
@@ -0,0 +1,17 @@
+# Makefile for uClibc NPTL
+#
+# Copyright (C) 2005 Steven J. Hill <sjhill@uclibc.org>
+#
+# Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+#
+
+CFLAGS-pthread_spin_init.c = -DNOT_IN_libc -DIS_IN_libpthread
+ASFLAGS-pthread_spin_lock.S = -DNOT_IN_libc -DIS_IN_libpthread
+ASFLAGS-pthread_spin_unlock.S = -DNOT_IN_libc -DIS_IN_libpthread
+ASFLAGS-pthread_spin_trylock.S = -DNOT_IN_libc -DIS_IN_libpthread
+
+ASFLAGS-pthread_spin_lock.c += -D_GNU_SOURCE
+
+CFLAGS-metag = $(SSP_ALL_CFLAGS)
+
+libc_arch_a_CSRC := libc-tls.c
diff --git a/libpthread/nptl/sysdeps/metag/dl-tls.h b/libpthread/nptl/sysdeps/metag/dl-tls.h
new file mode 100644
index 000000000..cba8fcb3b
--- /dev/null
+++ b/libpthread/nptl/sysdeps/metag/dl-tls.h
@@ -0,0 +1,29 @@
+/* Thread-local storage handling in the ELF dynamic linker.  Meta version.
+   Copyright (C) 2002 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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.  */
+
+
+/* Type used for the representation of TLS information in the GOT.  */
+typedef struct
+{
+  unsigned long int ti_module;
+  unsigned long int ti_offset;
+} tls_index;
+
+
+extern void *__tls_get_addr (tls_index *ti);
diff --git a/libpthread/nptl/sysdeps/metag/jmpbuf-unwind.h b/libpthread/nptl/sysdeps/metag/jmpbuf-unwind.h
new file mode 100644
index 000000000..eedf79427
--- /dev/null
+++ b/libpthread/nptl/sysdeps/metag/jmpbuf-unwind.h
@@ -0,0 +1,36 @@
+/* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
+
+   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 <setjmp.h>
+#include <stdint.h>
+#include <unwind.h>
+
+/* Test if longjmp to JMPBUF would unwind the frame
+   containing a local variable at ADDRESS.  */
+#undef _JMPBUF_UNWINDS
+#define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \
+  ((void *) (address) > (void *) demangle (jmpbuf[JB_SP]))
+
+#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \
+  _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA (_context), _adj)
+
+#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
+  ((uintptr_t) (_address) - (_adj) > (uintptr_t) (_jmpbuf)[JB_SP] - (_adj))
+
+#define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val)
diff --git a/libpthread/nptl/sysdeps/metag/libc-tls.c b/libpthread/nptl/sysdeps/metag/libc-tls.c
new file mode 100644
index 000000000..abc7c58db
--- /dev/null
+++ b/libpthread/nptl/sysdeps/metag/libc-tls.c
@@ -0,0 +1,33 @@
+/*
+ * Thread-local storage handling in statically linked binaries.  Meta version.
+ * Copyright (C) 2009 Free Software Foundation, Inc.
+ *
+ * Based on GNU C Library (file: libc/sysdeps/sh/libc-tls.c)
+ *
+ * Copyright (C) 2010 STMicroelectronics Ltd.
+ * Copyright (C) 2013 Imagination Technologies Ltd.
+ *
+ * Author: Filippo Arcidiacono <filippo.arcidiacono@st.com>
+ *
+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ *
+ */
+
+#include <sysdeps/generic/libc-tls.c>
+#include <dl-tls.h>
+
+#if defined (USE_TLS) && (USE_TLS)
+
+/* On Meta, linker optimizations are not required, so __tls_get_addr
+   can be called even in statically linked binaries.  In this case module
+   must be always 1 and PT_TLS segment exist in the binary, otherwise it
+   would not link.  */
+
+void *
+__tls_get_addr (tls_index *ti)
+{
+  dtv_t *dtv = THREAD_DTV ();
+  return (char *) dtv[1].pointer.val + ti->ti_offset;
+}
+
+#endif
diff --git a/libpthread/nptl/sysdeps/metag/metag_load_tp.S b/libpthread/nptl/sysdeps/metag/metag_load_tp.S
new file mode 100644
index 000000000..f17f7decd
--- /dev/null
+++ b/libpthread/nptl/sysdeps/metag/metag_load_tp.S
@@ -0,0 +1,7 @@
+/*
+ * Copyright (C) 2013 Imagination Technologies Ltd.
+ *
+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ */
+
+#include <../../../../ldso/ldso/metag/metag_load_tp.S>
diff --git a/libpthread/nptl/sysdeps/metag/pthread_spin_init.c b/libpthread/nptl/sysdeps/metag/pthread_spin_init.c
new file mode 100644
index 000000000..0a47981aa
--- /dev/null
+++ b/libpthread/nptl/sysdeps/metag/pthread_spin_init.c
@@ -0,0 +1,20 @@
+/* Copyright (C) 2002 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+   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.  */
+
+/* Not needed.  pthread_spin_init is an alias for pthread_spin_unlock.  */
diff --git a/libpthread/nptl/sysdeps/metag/pthread_spin_lock.S b/libpthread/nptl/sysdeps/metag/pthread_spin_lock.S
new file mode 100644
index 000000000..66e94c7a9
--- /dev/null
+++ b/libpthread/nptl/sysdeps/metag/pthread_spin_lock.S
@@ -0,0 +1,20 @@
+!    Copyright (C) 2013 Imagination Technologies Ltd.
+
+!    Licensed under LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+
+	.text
+	.global	_pthread_spin_lock
+	.type	_pthread_spin_lock,function
+_pthread_spin_lock:
+1:	LNKGETD	D0Ar2, [D1Ar1]
+	CMP	D0Ar2, #0
+	ADD	D0Ar2, D0Ar2, #1
+	LNKSETDEQ [D1Ar1], D0Ar2
+	BNE	1b
+	DEFR	D0Ar2, TXSTAT
+	ANDT	D0Ar2, D0Ar2, #HI(0x3f000000)
+	CMPT	D0Ar2, #HI(0x02000000)
+	BNZ	1b
+	MOV	D0Re0, #0
+	MOV	PC, D1RtP
+        .size   _pthread_spin_lock,.-_pthread_spin_lock
diff --git a/libpthread/nptl/sysdeps/metag/pthread_spin_trylock.S b/libpthread/nptl/sysdeps/metag/pthread_spin_trylock.S
new file mode 100644
index 000000000..e0b9b5083
--- /dev/null
+++ b/libpthread/nptl/sysdeps/metag/pthread_spin_trylock.S
@@ -0,0 +1,24 @@
+!    Copyright (C) 2013 Imagination Technologies Ltd.
+
+!    Licensed under LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+
+#include <pthread-errnos.h>
+
+	.text
+	.global	_pthread_spin_trylock
+	.type	_pthread_spin_trylock,function
+_pthread_spin_trylock:
+1:	MOVT	D0Re0, #HI(#EBUSY)
+	ADD	D0Re0, D0Re0, #LO(#EBUSY)
+	LNKGETD	D0Ar2, [D1Ar1]
+	CMP	D0Ar2, #0
+	ADD	D0Ar2, D0Ar2, #1
+	LNKSETDEQ [D1Ar1], D0Ar2
+	BNE	2f
+	DEFR	D0Ar2, TXSTAT
+	ANDT	D0Ar2, D0Ar2, #HI(0x3f000000)
+	CMPT	D0Ar2, #HI(0x02000000)
+	BNZ	1b
+	MOV	D0Re0, #0
+2:	MOV	PC, D1RtP
+        .size   _pthread_spin_trylock,.-_pthread_spin_trylock
diff --git a/libpthread/nptl/sysdeps/metag/pthread_spin_unlock.S b/libpthread/nptl/sysdeps/metag/pthread_spin_unlock.S
new file mode 100644
index 000000000..9bd95e675
--- /dev/null
+++ b/libpthread/nptl/sysdeps/metag/pthread_spin_unlock.S
@@ -0,0 +1,16 @@
+!    Copyright (C) 2013 Imagination Technologies Ltd.
+
+!    Licensed under LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+
+	.text
+	.global	_pthread_spin_unlock
+	.type	_pthread_spin_unlock,function
+_pthread_spin_unlock:
+	MOV	D0Re0, #0
+	SETD	[D1Ar1], D0Re0
+	MOV	PC, D1RtP
+        .size   _pthread_spin_unlock,.-_pthread_spin_unlock
+
+        /* The implementation of pthread_spin_init is identical.  */
+        .global  _pthread_spin_init
+_pthread_spin_init = _pthread_spin_unlock
diff --git a/libpthread/nptl/sysdeps/metag/pthreaddef.h b/libpthread/nptl/sysdeps/metag/pthreaddef.h
new file mode 100644
index 000000000..51625e4e6
--- /dev/null
+++ b/libpthread/nptl/sysdeps/metag/pthreaddef.h
@@ -0,0 +1,40 @@
+/* Copyright (C) 2003 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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 <sysdep.h>
+
+/* Default stack size.  */
+#define ARCH_STACK_DEFAULT_SIZE	(2 * 1024 * 1024)
+
+/* Required stack pointer alignment at beginning.  */
+#define STACK_ALIGN		8
+
+/* Minimal stack size after allocating thread descriptor and guard size.  */
+#define MINIMAL_REST_STACK	2048
+
+/* Alignment requirement for TCB.  */
+#define TCB_ALIGNMENT		8
+
+
+/* Location of current stack frame.  */
+#define CURRENT_STACK_FRAME	__builtin_frame_address (0)
+
+
+/* XXX Until we have a better place keep the definitions here.  */
+#define __exit_thread_inline(val) \
+  INLINE_SYSCALL (exit, 1, (val))
diff --git a/libpthread/nptl/sysdeps/metag/tcb-offsets.sym b/libpthread/nptl/sysdeps/metag/tcb-offsets.sym
new file mode 100644
index 000000000..753b72b2d
--- /dev/null
+++ b/libpthread/nptl/sysdeps/metag/tcb-offsets.sym
@@ -0,0 +1,15 @@
+#include <sysdep.h>
+#include <tls.h>
+
+RESULT			offsetof (struct pthread, result)
+TID			offsetof (struct pthread, tid)
+PID			offsetof (struct pthread, pid)
+CANCELHANDLING		offsetof (struct pthread, cancelhandling)
+CLEANUP_JMP_BUF		offsetof (struct pthread, cleanup_jmp_buf)
+MULTIPLE_THREADS_OFFSET	offsetof (struct pthread, header.multiple_threads)
+TLS_PRE_TCB_SIZE	sizeof (struct pthread)
+MUTEX_FUTEX		offsetof (pthread_mutex_t, __data.__lock)
+POINTER_GUARD		offsetof (tcbhead_t, pointer_guard)
+#ifndef __ASSUME_PRIVATE_FUTEX
+PRIVATE_FUTEX		offsetof (struct pthread, header.private_futex)
+#endif
diff --git a/libpthread/nptl/sysdeps/metag/tls.h b/libpthread/nptl/sysdeps/metag/tls.h
new file mode 100644
index 000000000..07702beca
--- /dev/null
+++ b/libpthread/nptl/sysdeps/metag/tls.h
@@ -0,0 +1,163 @@
+/* Definition for thread-local data handling.  NPTL/Meta version.
+   Copyright (C) 2003, 2005, 2006, 2007 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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.  */
+
+#ifndef _TLS_H
+#define _TLS_H
+
+#ifndef __ASSEMBLER__
+# include <stdbool.h>
+# include <stddef.h>
+# include <stdint.h>
+# include <stdlib.h>
+# include <list.h>
+# include <sysdep.h>
+# include <bits/kernel-features.h>
+
+/* Type for the dtv.  */
+typedef union dtv
+{
+  size_t counter;
+  struct
+  {
+    void *val;
+    bool is_static;
+  } pointer;
+} dtv_t;
+
+typedef struct
+{
+  dtv_t *dtv;
+  uintptr_t pointer_guard;
+} tcbhead_t;
+
+# define TLS_MULTIPLE_THREADS_IN_TCB 1
+
+#else /* __ASSEMBLER__ */
+# include <tcb-offsets.h>
+#endif /* __ASSEMBLER__ */
+
+
+/* We require TLS support in the tools.  */
+#define HAVE_TLS_SUPPORT
+#define HAVE___THREAD   1
+#define HAVE_TLS_MODEL_ATTRIBUTE       1
+/* Signal that TLS support is available.  */
+# define USE_TLS       1
+
+#ifndef __ASSEMBLER__
+
+/* Get system call information.  */
+# include <sysdep.h>
+
+/* This is the size of the initial TCB.  */
+# define TLS_INIT_TCB_SIZE sizeof (tcbhead_t)
+
+/* Alignment requirements for the initial TCB.  */
+# define TLS_INIT_TCB_ALIGN __alignof__ (tcbhead_t)
+
+/* This is the size of the TCB.  */
+# define TLS_TCB_SIZE sizeof (tcbhead_t)
+
+/* This is the size we need before TCB.  */
+# define TLS_PRE_TCB_SIZE sizeof (struct pthread)
+
+/* Alignment requirements for the TCB.  */
+# define TLS_TCB_ALIGN __alignof__ (struct pthread)
+
+/* The TLS blocks start right after the TCB.  */
+# define TLS_DTV_AT_TP	1
+
+/* Get the thread descriptor definition.  */
+# include <descr.h>
+
+/* Install the dtv pointer.  The pointer passed is to the element with
+   index -1 which contain the length.  */
+# define INSTALL_DTV(tcbp, dtvp) \
+  ((tcbhead_t *) (tcbp))->dtv = (dtvp) + 1
+
+/* Install new dtv for current thread.  */
+# define INSTALL_NEW_DTV(dtv) \
+  (((tcbhead_t *)__builtin_thread_pointer ())->dtv = (dtv))
+
+/* Return dtv of given thread descriptor.  */
+# define GET_DTV(tcbp) \
+  (((tcbhead_t *) (tcbp))->dtv)
+
+/* Code to initially initialize the thread pointer.  This might need
+   special attention since 'errno' is not yet available and if the
+   operation can cause a failure 'errno' must not be touched.  */
+# define TLS_INIT_TP(tcbp, secondcall) \
+  ({ INTERNAL_SYSCALL_DECL (err);					\
+     long result_var;							\
+     result_var = INTERNAL_SYSCALL (metag_set_tls, err, 1, (tcbp));	\
+     INTERNAL_SYSCALL_ERROR_P (result_var, err)				\
+       ? "unknown error" : NULL; })
+
+/* Return the address of the dtv for the current thread.  */
+# define THREAD_DTV() \
+  (((tcbhead_t *)__builtin_thread_pointer ())->dtv)
+
+/* Return the thread descriptor for the current thread.
+   The contained asm must *not* be marked volatile since otherwise
+   assignments like
+        struct pthread *self = thread_self();
+   do not get optimized away.  */
+# define THREAD_SELF \
+  ((struct pthread *)__builtin_thread_pointer () - 1)
+
+/* Magic for libthread_db to know how to do THREAD_SELF.  */
+# define DB_THREAD_SELF \
+  CONST_THREAD_AREA (32, sizeof (struct pthread))
+
+/* Access to data in the thread descriptor is easy.  */
+#define THREAD_GETMEM(descr, member) \
+  descr->member
+#define THREAD_GETMEM_NC(descr, member, idx) \
+  descr->member[idx]
+#define THREAD_SETMEM(descr, member, value) \
+  descr->member = (value)
+#define THREAD_SETMEM_NC(descr, member, idx, value) \
+  descr->member[idx] = (value)
+
+/* Get and set the global scope generation counter in struct pthread.  */
+#define THREAD_GSCOPE_FLAG_UNUSED 0
+#define THREAD_GSCOPE_FLAG_USED   1
+#define THREAD_GSCOPE_FLAG_WAIT   2
+#define THREAD_GSCOPE_RESET_FLAG() \
+  do									     \
+    { int __res								     \
+	= atomic_exchange_rel (&THREAD_SELF->header.gscope_flag,	     \
+			       THREAD_GSCOPE_FLAG_UNUSED);		     \
+      if (__res == THREAD_GSCOPE_FLAG_WAIT)				     \
+	lll_futex_wake (&THREAD_SELF->header.gscope_flag, 1, LLL_PRIVATE);   \
+    }									     \
+  while (0)
+#define THREAD_GSCOPE_SET_FLAG() \
+  do									     \
+    {									     \
+      THREAD_SELF->header.gscope_flag = THREAD_GSCOPE_FLAG_USED;	     \
+      atomic_write_barrier ();						     \
+    }									     \
+  while (0)
+#define THREAD_GSCOPE_WAIT() \
+  GL(dl_wait_lookup_done) ()
+
+#endif /* __ASSEMBLER__ */
+
+#endif	/* tls.h */