Move remaining nptl/sysdeps/unix/sysv/linux/i386/ files.

1 files changed, 463 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/i386/lowlevellock.h b/sysdeps/unix/sysv/linux/i386/lowlevellock.h
new file mode 100644
index 0000000..6903f92
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/i386/lowlevellock.h
@@ -0,0 +1,463 @@
+/* Copyright (C) 2002-2014 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _LOWLEVELLOCK_H
+#define _LOWLEVELLOCK_H	1
+
+#include <stap-probe.h>
+
+#ifndef __ASSEMBLER__
+# include <time.h>
+# include <sys/param.h>
+# include <bits/pthreadtypes.h>
+# include <kernel-features.h>
+# include <tcb-offsets.h>
+
+# ifndef LOCK_INSTR
+#  ifdef UP
+#   define LOCK_INSTR	/* nothing */
+#  else
+#   define LOCK_INSTR "lock;"
+#  endif
+# endif
+#else
+# ifndef LOCK
+#  ifdef UP
+#   define LOCK
+#  else
+#   define LOCK lock
+#  endif
+# endif
+#endif
+
+#define SYS_futex		240
+#define FUTEX_WAIT		0
+#define FUTEX_WAKE		1
+#define FUTEX_CMP_REQUEUE	4
+#define FUTEX_WAKE_OP		5
+#define FUTEX_LOCK_PI		6
+#define FUTEX_UNLOCK_PI		7
+#define FUTEX_TRYLOCK_PI	8
+#define FUTEX_WAIT_BITSET	9
+#define FUTEX_WAKE_BITSET	10
+#define FUTEX_WAIT_REQUEUE_PI	11
+#define FUTEX_CMP_REQUEUE_PI	12
+#define FUTEX_PRIVATE_FLAG	128
+#define FUTEX_CLOCK_REALTIME	256
+
+#define FUTEX_BITSET_MATCH_ANY	0xffffffff
+
+#define FUTEX_OP_CLEAR_WAKE_IF_GT_ONE	((4 << 24) | 1)
+
+/* Values for 'private' parameter of locking macros.  Yes, the
+   definition seems to be backwards.  But it is not.  The bit will be
+   reversed before passing to the system call.  */
+#define LLL_PRIVATE	0
+#define LLL_SHARED	FUTEX_PRIVATE_FLAG
+
+
+#if !defined NOT_IN_libc || defined IS_IN_rtld
+/* In libc.so or ld.so all futexes are private.  */
+# ifdef __ASSUME_PRIVATE_FUTEX
+#  define __lll_private_flag(fl, private) \
+  ((fl) | FUTEX_PRIVATE_FLAG)
+# else
+#  define __lll_private_flag(fl, private) \
+  ((fl) | THREAD_GETMEM (THREAD_SELF, header.private_futex))
+# endif
+#else
+# ifdef __ASSUME_PRIVATE_FUTEX
+#  define __lll_private_flag(fl, private) \
+  (((fl) | FUTEX_PRIVATE_FLAG) ^ (private))
+# else
+#  define __lll_private_flag(fl, private) \
+  (__builtin_constant_p (private)					      \
+   ? ((private) == 0							      \
+      ? ((fl) | THREAD_GETMEM (THREAD_SELF, header.private_futex))	      \
+      : (fl))								      \
+   : ({ unsigned int __fl = ((private) ^ FUTEX_PRIVATE_FLAG);		      \
+	asm ("andl %%gs:%P1, %0" : "+r" (__fl)				      \
+	     : "i" (offsetof (struct pthread, header.private_futex)));	      \
+	__fl | (fl); }))
+# endif
+#endif
+
+#ifndef __ASSEMBLER__
+
+/* Initializer for compatibility lock.  */
+#define LLL_LOCK_INITIALIZER		(0)
+#define LLL_LOCK_INITIALIZER_LOCKED	(1)
+#define LLL_LOCK_INITIALIZER_WAITERS	(2)
+
+
+#ifdef PIC
+# define LLL_EBX_LOAD	"xchgl %2, %%ebx\n"
+# define LLL_EBX_REG	"D"
+#else
+# define LLL_EBX_LOAD
+# define LLL_EBX_REG	"b"
+#endif
+
+#ifdef I386_USE_SYSENTER
+# ifdef SHARED
+#  define LLL_ENTER_KERNEL	"call *%%gs:%P6\n\t"
+# else
+#  define LLL_ENTER_KERNEL	"call *_dl_sysinfo\n\t"
+# endif
+#else
+# define LLL_ENTER_KERNEL	"int $0x80\n\t"
+#endif
+
+/* Delay in spinlock loop.  */
+#define BUSY_WAIT_NOP	asm ("rep; nop")
+
+#define lll_futex_wait(futex, val, private) \
+  lll_futex_timed_wait (futex, val, NULL, private)
+
+
+#define lll_futex_timed_wait(futex, val, timeout, private) \
+  ({									      \
+    int __status;							      \
+    register __typeof (val) _val asm ("edx") = (val);			      \
+    __asm __volatile (LLL_EBX_LOAD					      \
+		      LLL_ENTER_KERNEL					      \
+		      LLL_EBX_LOAD					      \
+		      : "=a" (__status)					      \
+		      : "0" (SYS_futex), LLL_EBX_REG (futex), "S" (timeout),  \
+			"c" (__lll_private_flag (FUTEX_WAIT, private)),	      \
+			"d" (_val), "i" (offsetof (tcbhead_t, sysinfo))	      \
+		      : "memory");					      \
+    __status;								      \
+  })
+
+
+#define lll_futex_wake(futex, nr, private) \
+  ({									      \
+    int __status;							      \
+    register __typeof (nr) _nr asm ("edx") = (nr);			      \
+    LIBC_PROBE (lll_futex_wake, 3, futex, nr, private);                       \
+    __asm __volatile (LLL_EBX_LOAD					      \
+		      LLL_ENTER_KERNEL					      \
+		      LLL_EBX_LOAD					      \
+		      : "=a" (__status)					      \
+		      : "0" (SYS_futex), LLL_EBX_REG (futex),		      \
+			"c" (__lll_private_flag (FUTEX_WAKE, private)),	      \
+			"d" (_nr),					      \
+			"i" (0) /* phony, to align next arg's number */,      \
+			"i" (offsetof (tcbhead_t, sysinfo)));		      \
+    __status;								      \
+  })
+
+
+/* NB: in the lll_trylock macro we simply return the value in %eax
+   after the cmpxchg instruction.  In case the operation succeded this
+   value is zero.  In case the operation failed, the cmpxchg instruction
+   has loaded the current value of the memory work which is guaranteed
+   to be nonzero.  */
+#if defined NOT_IN_libc || defined UP
+# define __lll_trylock_asm LOCK_INSTR "cmpxchgl %2, %1"
+#else
+# define __lll_trylock_asm "cmpl $0, %%gs:%P5\n\t" \
+			   "je 0f\n\t"					      \
+			   "lock\n"					      \
+			   "0:\tcmpxchgl %2, %1"
+#endif
+
+#define lll_trylock(futex) \
+  ({ int ret;								      \
+     __asm __volatile (__lll_trylock_asm				      \
+		       : "=a" (ret), "=m" (futex)			      \
+		       : "r" (LLL_LOCK_INITIALIZER_LOCKED), "m" (futex),      \
+			 "0" (LLL_LOCK_INITIALIZER),			      \
+			 "i" (MULTIPLE_THREADS_OFFSET)			      \
+		       : "memory");					      \
+     ret; })
+
+#define lll_robust_trylock(futex, id) \
+  ({ int ret;								      \
+     __asm __volatile (LOCK_INSTR "cmpxchgl %2, %1"			      \
+		       : "=a" (ret), "=m" (futex)			      \
+		       : "r" (id), "m" (futex),				      \
+			 "0" (LLL_LOCK_INITIALIZER)			      \
+		       : "memory");					      \
+     ret; })
+
+
+#define lll_cond_trylock(futex) \
+  ({ int ret;								      \
+     __asm __volatile (LOCK_INSTR "cmpxchgl %2, %1"			      \
+		       : "=a" (ret), "=m" (futex)			      \
+		       : "r" (LLL_LOCK_INITIALIZER_WAITERS),		      \
+			 "m" (futex), "0" (LLL_LOCK_INITIALIZER)	      \
+		       : "memory");					      \
+     ret; })
+
+#if defined NOT_IN_libc || defined UP
+# define __lll_lock_asm_start LOCK_INSTR "cmpxchgl %1, %2\n\t"
+#else
+# define __lll_lock_asm_start "cmpl $0, %%gs:%P6\n\t"			      \
+			      "je 0f\n\t"				      \
+			      "lock\n"					      \
+			      "0:\tcmpxchgl %1, %2\n\t"
+#endif
+
+#define lll_lock(futex, private) \
+  (void)								      \
+    ({ int ignore1, ignore2;						      \
+       if (__builtin_constant_p (private) && (private) == LLL_PRIVATE)	      \
+	 __asm __volatile (__lll_lock_asm_start				      \
+			   "jz 18f\n\t"				      \
+			   "1:\tleal %2, %%ecx\n"			      \
+			   "2:\tcall __lll_lock_wait_private\n" 	      \
+			   "18:"					      \
+			   : "=a" (ignore1), "=c" (ignore2), "=m" (futex)     \
+			   : "0" (0), "1" (1), "m" (futex),		      \
+			     "i" (MULTIPLE_THREADS_OFFSET)		      \
+			   : "memory");					      \
+       else								      \
+	 {								      \
+	   int ignore3;							      \
+	   __asm __volatile (__lll_lock_asm_start			      \
+			     "jz 18f\n\t"			 	      \
+			     "1:\tleal %2, %%edx\n"			      \
+			     "0:\tmovl %8, %%ecx\n"			      \
+			     "2:\tcall __lll_lock_wait\n"		      \
+			     "18:"					      \
+			     : "=a" (ignore1), "=c" (ignore2),		      \
+			       "=m" (futex), "=&d" (ignore3) 		      \
+			     : "1" (1), "m" (futex),			      \
+			       "i" (MULTIPLE_THREADS_OFFSET), "0" (0),	      \
+			       "g" ((int) (private))			      \
+			     : "memory");				      \
+	 }								      \
+    })
+
+#define lll_robust_lock(futex, id, private) \
+  ({ int result, ignore1, ignore2;					      \
+     __asm __volatile (LOCK_INSTR "cmpxchgl %1, %2\n\t"			      \
+		       "jz 18f\n\t"					      \
+		       "1:\tleal %2, %%edx\n"				      \
+		       "0:\tmovl %7, %%ecx\n"				      \
+		       "2:\tcall __lll_robust_lock_wait\n"		      \
+		       "18:"						      \
+		       : "=a" (result), "=c" (ignore1), "=m" (futex),	      \
+			 "=&d" (ignore2)				      \
+		       : "0" (0), "1" (id), "m" (futex), "g" ((int) (private))\
+		       : "memory");					      \
+     result; })
+
+
+/* Special version of lll_lock which causes the unlock function to
+   always wakeup waiters.  */
+#define lll_cond_lock(futex, private) \
+  (void)								      \
+    ({ int ignore1, ignore2, ignore3;					      \
+       __asm __volatile (LOCK_INSTR "cmpxchgl %1, %2\n\t"		      \
+			 "jz 18f\n\t"					      \
+			 "1:\tleal %2, %%edx\n"				      \
+			 "0:\tmovl %7, %%ecx\n"				      \
+			 "2:\tcall __lll_lock_wait\n"			      \
+			 "18:"						      \
+			 : "=a" (ignore1), "=c" (ignore2), "=m" (futex),      \
+			   "=&d" (ignore3)				      \
+			 : "0" (0), "1" (2), "m" (futex), "g" ((int) (private))\
+			 : "memory");					      \
+    })
+
+
+#define lll_robust_cond_lock(futex, id, private) \
+  ({ int result, ignore1, ignore2;					      \
+     __asm __volatile (LOCK_INSTR "cmpxchgl %1, %2\n\t"			      \
+		       "jz 18f\n\t"					      \
+		       "1:\tleal %2, %%edx\n"				      \
+		       "0:\tmovl %7, %%ecx\n"				      \
+		       "2:\tcall __lll_robust_lock_wait\n"		      \
+		       "18:"						      \
+		       : "=a" (result), "=c" (ignore1), "=m" (futex),	      \
+			 "=&d" (ignore2)				      \
+		       : "0" (0), "1" (id | FUTEX_WAITERS), "m" (futex),      \
+			 "g" ((int) (private))				      \
+		       : "memory");					      \
+     result; })
+
+
+#define lll_timedlock(futex, timeout, private) \
+  ({ int result, ignore1, ignore2, ignore3;				      \
+     __asm __volatile (LOCK_INSTR "cmpxchgl %1, %3\n\t"			      \
+		       "jz 18f\n\t"					      \
+		       "1:\tleal %3, %%ecx\n"				      \
+		       "0:\tmovl %8, %%edx\n"				      \
+		       "2:\tcall __lll_timedlock_wait\n"		      \
+		       "18:"						      \
+		       : "=a" (result), "=c" (ignore1), "=&d" (ignore2),      \
+			 "=m" (futex), "=S" (ignore3)			      \
+		       : "0" (0), "1" (1), "m" (futex), "m" (timeout),	      \
+			 "4" ((int) (private))				      \
+		       : "memory");					      \
+     result; })
+
+extern int __lll_timedlock_elision (int *futex, short *adapt_count,
+					 const struct timespec *timeout,
+					 int private) attribute_hidden;
+
+#define lll_timedlock_elision(futex, adapt_count, timeout, private)	\
+  __lll_timedlock_elision(&(futex), &(adapt_count), timeout, private)
+
+#define lll_robust_timedlock(futex, timeout, id, private) \
+  ({ int result, ignore1, ignore2, ignore3;				      \
+     __asm __volatile (LOCK_INSTR "cmpxchgl %1, %3\n\t"			      \
+		       "jz 18f\n\t"			   		      \
+		       "1:\tleal %3, %%ecx\n"				      \
+		       "0:\tmovl %8, %%edx\n"				      \
+		       "2:\tcall __lll_robust_timedlock_wait\n"		      \
+		       "18:"						      \
+		       : "=a" (result), "=c" (ignore1), "=&d" (ignore2),      \
+			 "=m" (futex), "=S" (ignore3)			      \
+		       : "0" (0), "1" (id), "m" (futex), "m" (timeout),	      \
+			 "4" ((int) (private))				      \
+		       : "memory");					      \
+     result; })
+
+#if defined NOT_IN_libc || defined UP
+# define __lll_unlock_asm LOCK_INSTR "subl $1, %0\n\t"
+#else
+# define __lll_unlock_asm "cmpl $0, %%gs:%P3\n\t"			      \
+			  "je 0f\n\t"					      \
+			  "lock\n"					      \
+			  "0:\tsubl $1,%0\n\t"
+#endif
+
+#define lll_unlock(futex, private) \
+  (void)								      \
+    ({ int ignore;							      \
+       if (__builtin_constant_p (private) && (private) == LLL_PRIVATE)	      \
+	 __asm __volatile (__lll_unlock_asm				      \
+			   "je 18f\n\t"					      \
+			   "1:\tleal %0, %%eax\n"			      \
+			   "2:\tcall __lll_unlock_wake_private\n"	      \
+			   "18:"					      \
+			   : "=m" (futex), "=&a" (ignore)		      \
+			   : "m" (futex), "i" (MULTIPLE_THREADS_OFFSET)	      \
+			   : "memory");					      \
+       else								      \
+	 {								      \
+	   int ignore2;							      \
+	   __asm __volatile (__lll_unlock_asm				      \
+			     "je 18f\n\t"				      \
+			     "1:\tleal %0, %%eax\n"			      \
+			     "0:\tmovl %5, %%ecx\n"			      \
+			     "2:\tcall __lll_unlock_wake\n"		      \
+			     "18:"					      \
+			     : "=m" (futex), "=&a" (ignore), "=&c" (ignore2)  \
+			     : "i" (MULTIPLE_THREADS_OFFSET), "m" (futex),    \
+			       "g" ((int) (private))			      \
+			     : "memory");				      \
+	 }								      \
+    })
+
+#define lll_robust_unlock(futex, private) \
+  (void)								      \
+    ({ int ignore, ignore2;						      \
+       __asm __volatile (LOCK_INSTR "andl %3, %0\n\t"			      \
+			 "je 18f\n\t"					      \
+			 "1:\tleal %0, %%eax\n"				      \
+			 "0:\tmovl %5, %%ecx\n"				      \
+			 "2:\tcall __lll_unlock_wake\n"			      \
+			 "18:"						      \
+			 : "=m" (futex), "=&a" (ignore), "=&c" (ignore2)      \
+			 : "i" (FUTEX_WAITERS), "m" (futex),		      \
+			   "g" ((int) (private))			      \
+			 : "memory");					      \
+    })
+
+
+#define lll_robust_dead(futex, private) \
+  (void)								      \
+    ({ int __ignore;							      \
+       register int _nr asm ("edx") = 1;				      \
+       __asm __volatile (LOCK_INSTR "orl %5, (%2)\n\t"			      \
+			 LLL_EBX_LOAD					      \
+			 LLL_ENTER_KERNEL				      \
+			 LLL_EBX_LOAD					      \
+			 : "=a" (__ignore)				      \
+			 : "0" (SYS_futex), LLL_EBX_REG (&(futex)),	      \
+			   "c" (__lll_private_flag (FUTEX_WAKE, private)),    \
+			   "d" (_nr), "i" (FUTEX_OWNER_DIED),		      \
+			   "i" (offsetof (tcbhead_t, sysinfo)));	      \
+    })
+
+#define lll_islocked(futex) \
+  (futex != LLL_LOCK_INITIALIZER)
+
+/* The kernel notifies a process which uses CLONE_CHILD_CLEARTID via futex
+   wakeup when the clone terminates.  The memory location contains the
+   thread ID while the clone is running and is reset to zero
+   afterwards.
+
+   The macro parameter must not have any side effect.  */
+#define lll_wait_tid(tid) \
+  do {									      \
+    int __ignore;							      \
+    register __typeof (tid) _tid asm ("edx") = (tid);			      \
+    if (_tid != 0)							      \
+      __asm __volatile (LLL_EBX_LOAD					      \
+			"1:\tmovl %1, %%eax\n\t"			      \
+			LLL_ENTER_KERNEL				      \
+			"cmpl $0, (%%ebx)\n\t"				      \
+			"jne 1b\n\t"					      \
+			LLL_EBX_LOAD					      \
+			: "=&a" (__ignore)				      \
+			: "i" (SYS_futex), LLL_EBX_REG (&tid), "S" (0),	      \
+			  "c" (FUTEX_WAIT), "d" (_tid),			      \
+			  "i" (offsetof (tcbhead_t, sysinfo))		      \
+			: "memory");					      \
+  } while (0)
+
+extern int __lll_timedwait_tid (int *tid, const struct timespec *abstime)
+     __attribute__ ((regparm (2))) attribute_hidden;
+#define lll_timedwait_tid(tid, abstime) \
+  ({									      \
+    int __result = 0;							      \
+    if (tid != 0)							      \
+      {									      \
+	if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000)	      \
+	  __result = EINVAL;						      \
+	else								      \
+	  __result = __lll_timedwait_tid (&tid, abstime);		      \
+      }									      \
+    __result; })
+
+extern int __lll_lock_elision (int *futex, short *adapt_count, int private)
+  attribute_hidden;
+
+extern int __lll_unlock_elision(int *lock, int private)
+  attribute_hidden;
+
+extern int __lll_trylock_elision(int *lock, short *adapt_count)
+  attribute_hidden;
+
+#define lll_lock_elision(futex, adapt_count, private) \
+  __lll_lock_elision (&(futex), &(adapt_count), private)
+#define lll_unlock_elision(futex, private) \
+  __lll_unlock_elision (&(futex), private)
+#define lll_trylock_elision(futex, adapt_count) \
+  __lll_trylock_elision(&(futex), &(adapt_count))
+
+#endif  /* !__ASSEMBLER__ */
+
+#endif	/* lowlevellock.h */