Move all files into ports/ subdirectory in preparation for merge with glibcglibc-2.16-ports-before-merge

6 files changed, 360 insertions, 0 deletions

diff --git a/ports/sysdeps/tile/nptl/Makefile b/ports/sysdeps/tile/nptl/Makefile
new file mode 100644
index 0000000000..66749284c7
--- /dev/null
+++ b/ports/sysdeps/tile/nptl/Makefile
@@ -0,0 +1,20 @@
+# Copyright (C) 2002, 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, see
+# <http://www.gnu.org/licenses/>.
+
+ifeq ($(subdir),csu)
+gen-as-const-headers += tcb-offsets.sym
+endif
diff --git a/ports/sysdeps/tile/nptl/pthread_spin_lock.c b/ports/sysdeps/tile/nptl/pthread_spin_lock.c
new file mode 100644
index 0000000000..18716f44c9
--- /dev/null
+++ b/ports/sysdeps/tile/nptl/pthread_spin_lock.c
@@ -0,0 +1,56 @@
+/* Copyright (C) 2011 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
+
+   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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include "pthreadP.h"
+#include <arch/spr_def.h>
+#include <atomic.h>
+
+/* Bound point for bounded exponential backoff */
+#define BACKOFF_MAX 2048
+
+/* Initial cycle delay for exponential backoff */
+#define BACKOFF_START 32
+
+#ifdef __tilegx__
+/* Use cmpexch() after the initial fast-path exch to avoid
+   invalidating the cache line of the lock holder.  */
+# define TNS(p) atomic_exchange_acq((p), 1)
+# define CMPTNS(p) atomic_compare_and_exchange_val_acq((p), 1, 0)
+#else
+# define TNS(p) __insn_tns(p)
+# define CMPTNS(p) __insn_tns(p)
+# define SPR_CYCLE SPR_CYCLE_LOW   /* The low 32 bits are sufficient. */
+#endif
+
+int
+pthread_spin_lock (pthread_spinlock_t *lock)
+{
+  if (__builtin_expect (TNS (lock) != 0, 0))
+    {
+      unsigned int backoff = BACKOFF_START;
+      while (CMPTNS (lock) != 0)
+        {
+          unsigned int start = __insn_mfspr (SPR_CYCLE);
+          while (__insn_mfspr (SPR_CYCLE) - start < backoff)
+            ;
+          if (backoff < BACKOFF_MAX)
+            backoff *= 2;
+        }
+    }
+  return 0;
+}
diff --git a/ports/sysdeps/tile/nptl/pthread_spin_trylock.c b/ports/sysdeps/tile/nptl/pthread_spin_trylock.c
new file mode 100644
index 0000000000..fb67f36deb
--- /dev/null
+++ b/ports/sysdeps/tile/nptl/pthread_spin_trylock.c
@@ -0,0 +1,32 @@
+/* Copyright (C) 2011 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
+
+   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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include "pthreadP.h"
+#include <errno.h>
+
+#ifdef __tilegx__
+#define TNS(p) __insn_exch4((p), 1)
+#else
+#define TNS(p) __insn_tns(p)
+#endif
+
+int
+pthread_spin_trylock (pthread_spinlock_t *lock)
+{
+  return (TNS (lock) == 0) ? 0 : EBUSY;
+}
diff --git a/ports/sysdeps/tile/nptl/pthreaddef.h b/ports/sysdeps/tile/nptl/pthreaddef.h
new file mode 100644
index 0000000000..2b54687994
--- /dev/null
+++ b/ports/sysdeps/tile/nptl/pthreaddef.h
@@ -0,0 +1,41 @@
+/* Copyright (C) 2011 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
+
+   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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stdlib.h>
+#include <string.h>
+
+/* Default stack size.  */
+#define ARCH_STACK_DEFAULT_SIZE	(2 * 1024 * 1024)
+
+/* Required stack pointer alignment at beginning.  */
+#define STACK_ALIGN		16
+
+/* Minimal stack size after allocating thread descriptor and guard size.  */
+#define MINIMAL_REST_STACK	2048
+
+/* Alignment requirement for TCB.  */
+#define TCB_ALIGNMENT		16
+
+
+/* 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/ports/sysdeps/tile/nptl/tcb-offsets.sym b/ports/sysdeps/tile/nptl/tcb-offsets.sym
new file mode 100644
index 0000000000..6740bc976f
--- /dev/null
+++ b/ports/sysdeps/tile/nptl/tcb-offsets.sym
@@ -0,0 +1,17 @@
+#define SHARED  /* needed to get struct rtld_global from <ldsodefs.h> */
+#include <sysdep.h>
+#include <tls.h>
+#include <ldsodefs.h>
+
+--
+
+-- Abuse tls.h macros to derive offsets relative to the thread register.
+#define thread_offsetof(mem)	(long)(offsetof(struct pthread, mem) - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE)
+
+MULTIPLE_THREADS_OFFSET		thread_offsetof (header.multiple_threads)
+PID_OFFSET			thread_offsetof (pid)
+TID_OFFSET			thread_offsetof (tid)
+POINTER_GUARD			(offsetof (tcbhead_t, pointer_guard) - TLS_TCB_OFFSET - sizeof (tcbhead_t))
+FEEDBACK_DATA_OFFSET		(offsetof (tcbhead_t, feedback_data) - TLS_TCB_OFFSET - sizeof (tcbhead_t))
+DTV_OFFSET			(offsetof (tcbhead_t, dtv) - TLS_TCB_OFFSET - sizeof (tcbhead_t))
+TLS_GENERATION_OFFSET		offsetof (struct rtld_global, _dl_tls_generation)
diff --git a/ports/sysdeps/tile/nptl/tls.h b/ports/sysdeps/tile/nptl/tls.h
new file mode 100644
index 0000000000..303a95e000
--- /dev/null
+++ b/ports/sysdeps/tile/nptl/tls.h
@@ -0,0 +1,194 @@
+/* Copyright (C) 2011 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
+
+   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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _TLS_H
+#define _TLS_H	1
+
+# include <dl-sysdep.h>
+
+#ifndef __ASSEMBLER__
+# include <stdbool.h>
+# include <stddef.h>
+# include <stdint.h>
+
+/* Type for the dtv.  */
+typedef union dtv
+{
+  size_t counter;
+  struct
+  {
+    void *val;
+    bool is_static;
+  } pointer;
+} dtv_t;
+
+#else /* __ASSEMBLER__ */
+# include <tcb-offsets.h>
+#endif /* __ASSEMBLER__ */
+
+
+#ifndef __ASSEMBLER__
+
+/* Get system call information.  */
+# include <sysdep.h>
+
+/* The TP points to the start of the thread blocks.  */
+# define TLS_DTV_AT_TP	1
+
+/* We use the multiple_threads field in the pthread struct */
+#define TLS_MULTIPLE_THREADS_IN_TCB	1
+
+/* Get the thread descriptor definition.  */
+# include <nptl/descr.h>
+
+/* The stack_guard is accessed directly by GCC -fstack-protector code,
+   so it is a part of public ABI.  The dtv and pointer_guard fields
+   are private.  */
+typedef struct
+{
+  void *feedback_data;
+  uintptr_t pointer_guard;
+  uintptr_t stack_guard;
+  dtv_t *dtv;
+} tcbhead_t;
+
+/* This is the size of the initial TCB.  Because our TCB is before the thread
+   pointer, we don't need this.  */
+# define TLS_INIT_TCB_SIZE	0
+
+/* Alignment requirements for the initial TCB.  */
+# define TLS_INIT_TCB_ALIGN	__alignof__ (struct pthread)
+
+/* This is the size of the TCB.  Because our TCB is before the thread
+   pointer, we don't need this.  */
+# define TLS_TCB_SIZE		0
+
+/* Alignment requirements for the TCB.  */
+# define TLS_TCB_ALIGN		__alignof__ (struct pthread)
+
+/* This is the size we need before TCB - actually, it includes the TCB.  */
+# define TLS_PRE_TCB_SIZE \
+  (sizeof (struct pthread)						      \
+   + ((sizeof (tcbhead_t) + TLS_TCB_ALIGN - 1) & ~(TLS_TCB_ALIGN - 1)))
+
+/* Return the thread descriptor (tp) for the current thread.  */
+register void *__thread_pointer asm ("tp");
+
+/* The thread pointer (in hardware register tp) points to the end of
+   the TCB.  The pthread_descr structure is immediately in front of the TCB.  */
+# define TLS_TCB_OFFSET	0
+
+/* 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))[-1].dtv = (dtvp) + 1)
+
+/* Install new dtv for current thread.  */
+# define INSTALL_NEW_DTV(dtv) (THREAD_DTV() = (dtv))
+
+/* Return dtv of given thread descriptor.  */
+# define GET_DTV(tcbp)	(((tcbhead_t *) (tcbp))[-1].dtv)
+
+/* Code to initially initialize the thread pointer (tp).  */
+# define TLS_INIT_TP(tcbp, secondcall) \
+    (__thread_pointer = (char *)(tcbp) + TLS_TCB_OFFSET, NULL)
+
+/* Return the address of the dtv for the current thread.  */
+# define THREAD_DTV() \
+    (((tcbhead_t *) (__thread_pointer - TLS_TCB_OFFSET))[-1].dtv)
+
+/* Return the thread descriptor for the current thread.  */
+# define THREAD_SELF \
+    ((struct pthread *) (__thread_pointer \
+			 - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE))
+
+/* Magic for libthread_db to know how to do THREAD_SELF.  */
+#ifdef __tilegx__
+# define DB_THREAD_SELF \
+  REGISTER (64, 64, REG_TP * 8, - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE)
+#else
+# define DB_THREAD_SELF \
+  REGISTER (32, 32, REG_TP * 4, - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE)
+#endif
+
+/* Read member of the thread descriptor directly.  */
+# define THREAD_GETMEM(descr, member) (descr->member)
+
+/* Same as THREAD_GETMEM, but the member offset can be non-constant.  */
+# define THREAD_GETMEM_NC(descr, member, idx) \
+    (descr->member[idx])
+
+/* Set member of the thread descriptor directly.  */
+# define THREAD_SETMEM(descr, member, value) \
+    (descr->member = (value))
+
+/* Same as THREAD_SETMEM, but the member offset can be non-constant.  */
+# define THREAD_SETMEM_NC(descr, member, idx, value) \
+    (descr->member[idx] = (value))
+
+/* Set the stack guard field in TCB head.  */
+# define THREAD_SET_STACK_GUARD(value) \
+    (((tcbhead_t *) ((char *) __thread_pointer				      \
+		     - TLS_TCB_OFFSET))[-1].stack_guard = (value))
+# define THREAD_COPY_STACK_GUARD(descr) \
+    (((tcbhead_t *) ((char *) (descr)					      \
+		     + TLS_PRE_TCB_SIZE))[-1].stack_guard		      \
+     = ((tcbhead_t *) ((char *) __thread_pointer			      \
+		       - TLS_TCB_OFFSET))[-1].stack_guard)
+
+/* Set the pointer guard field in TCB head.  */
+# define THREAD_GET_POINTER_GUARD() \
+    (((tcbhead_t *) ((char *) __thread_pointer				      \
+		     - TLS_TCB_OFFSET))[-1].pointer_guard)
+# define THREAD_SET_POINTER_GUARD(value) \
+    (THREAD_GET_POINTER_GUARD () = (value))
+# define THREAD_COPY_POINTER_GUARD(descr) \
+    (((tcbhead_t *) ((char *) (descr)					      \
+		     + TLS_PRE_TCB_SIZE))[-1].pointer_guard		      \
+     = THREAD_GET_POINTER_GUARD())
+
+/* l_tls_offset == 0 is perfectly valid on Tile, so we have to use some
+   different value to mean unset l_tls_offset.  */
+# define NO_TLS_OFFSET		-1
+
+/* 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 */