/* Definition for thread-local data handling. nptl/i386 version.
- Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+ Copyright (C) 2002-2007, 2009 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
# include <stdint.h>
# include <stdlib.h>
# include <list.h>
+# include <sysdep.h>
+# include <bits/kernel-features.h>
/* Type for the dtv. */
int multiple_threads;
uintptr_t sysinfo;
uintptr_t stack_guard;
+ uintptr_t pointer_guard;
+ int gscope_flag;
+#ifndef __ASSUME_PRIVATE_FUTEX
+ int private_futex;
+#else
+ int __unused1;
+#endif
+ /* Reservation of some values for the TM ABI. */
+ void *__private_tm[5];
} tcbhead_t;
# define TLS_MULTIPLE_THREADS_IN_TCB 1
#define HAVE_TLS_MODEL_ATTRIBUTE 1
/* Signal that TLS support is available. */
-#define USE_TLS 1
+#define USE_TLS 1
+
/* Alignment requirement for the stack. For IA-32 this is governed by
the SSE memory functions. */
};
+/* Get the thread descriptor definition. */
+# include <descr.h>
+
/* This is the size of the initial TCB. Can't be just sizeof (tcbhead_t),
because NPTL getpid, __libc_alloca_cutoff etc. need (almost) the whole
struct pthread even when not linked with -lpthread. */
/* Alignment requirements for the TCB. */
# define TLS_TCB_ALIGN __alignof__ (struct pthread)
-/* Get the thread descriptor definition. */
-#include <descr.h>
-
/* The TCB can have any size and the memory following the address the
thread pointer points to is unspecified. Allocate the TCB there. */
# define TLS_TCB_AT_TP 1
_segdescr.vals[3] = 0x51; \
\
/* Install the TLS. */ \
- __asm__ volatile (TLS_LOAD_EBX \
+ __asm__ volatile (TLS_LOAD_EBX \
"int $0x80\n\t" \
TLS_LOAD_EBX \
: "=a" (_result), "=m" (_segdescr.desc.entry_number) \
do not get optimized away. */
# define THREAD_SELF \
({ struct pthread *__self; \
- __asm__ ("movl %%gs:%c1,%0" : "=r" (__self) \
+ __asm__ ("movl %%gs:%c1,%0" : "=r" (__self) \
: "i" (offsetof (struct pthread, header.self))); \
__self;})
# define THREAD_GETMEM(descr, member) \
({ __typeof (descr->member) __value; \
if (sizeof (__value) == 1) \
- __asm__ volatile ("movb %%gs:%P2,%b0" \
+ __asm__ volatile ("movb %%gs:%P2,%b0" \
: "=q" (__value) \
: "0" (0), "i" (offsetof (struct pthread, member))); \
else if (sizeof (__value) == 4) \
- __asm__ volatile ("movl %%gs:%P1,%0" \
+ __asm__ volatile ("movl %%gs:%P1,%0" \
: "=r" (__value) \
: "i" (offsetof (struct pthread, member))); \
else \
# define THREAD_GETMEM_NC(descr, member, idx) \
({ __typeof (descr->member[0]) __value; \
if (sizeof (__value) == 1) \
- __asm__ volatile ("movb %%gs:%P2(%3),%b0" \
+ __asm__ volatile ("movb %%gs:%P2(%3),%b0" \
: "=q" (__value) \
: "0" (0), "i" (offsetof (struct pthread, member[0])), \
"r" (idx)); \
else if (sizeof (__value) == 4) \
- __asm__ volatile ("movl %%gs:%P1(,%2,4),%0" \
+ __asm__ volatile ("movl %%gs:%P1(,%2,4),%0" \
: "=r" (__value) \
: "i" (offsetof (struct pthread, member[0])), \
"r" (idx)); \
/* Set member of the thread descriptor directly. */
# define THREAD_SETMEM_NC(descr, member, idx, value) \
({ if (sizeof (descr->member[0]) == 1) \
- __asm__ volatile ("movb %b0,%%gs:%P1(%2)" : \
+ __asm__ volatile ("movb %b0,%%gs:%P1(%2)" : \
: "iq" (value), \
"i" (offsetof (struct pthread, member)), \
"r" (idx)); \
4 or 8. */ \
abort (); \
\
- __asm__ volatile ("movl %%eax,%%gs:%P1(,%2,8)\n\t" \
+ __asm__ volatile ("movl %%eax,%%gs:%P1(,%2,8)\n\t" \
"movl %%edx,%%gs:4+%P1(,%2,8)" : \
: "A" (value), \
"i" (offsetof (struct pthread, member)), \
__ret; })
+/* Atomic logical and. */
+#define THREAD_ATOMIC_AND(descr, member, val) \
+ (void) ({ if (sizeof ((descr)->member) == 4) \
+ __asm__ volatile (LOCK_PREFIX "andl %1, %%gs:%P0" \
+ :: "i" (offsetof (struct pthread, member)), \
+ "ir" (val)); \
+ else \
+ /* Not necessary for other sizes in the moment. */ \
+ abort (); })
+
+
/* Atomic set bit. */
#define THREAD_ATOMIC_BIT_SET(descr, member, bit) \
(void) ({ if (sizeof ((descr)->member) == 4) \
= THREAD_GETMEM (THREAD_SELF, header.stack_guard))
+/* Set the pointer guard field in the TCB head. */
+#define THREAD_SET_POINTER_GUARD(value) \
+ THREAD_SETMEM (THREAD_SELF, header.pointer_guard, value)
+#define THREAD_COPY_POINTER_GUARD(descr) \
+ ((descr)->header.pointer_guard \
+ = THREAD_GETMEM (THREAD_SELF, header.pointer_guard))
+
+
+/* Get and set the global scope generation counter in the TCB head. */
+#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; \
+ __asm__ volatile ("xchgl %0, %%gs:%P1" \
+ : "=r" (__res) \
+ : "i" (offsetof (struct pthread, header.gscope_flag)), \
+ "0" (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() \
+ THREAD_SETMEM (THREAD_SELF, header.gscope_flag, THREAD_GSCOPE_FLAG_USED)
+#define THREAD_GSCOPE_WAIT() \
+ GL(dl_wait_lookup_done) ()
+
#endif /* __ASSEMBLER__ */
#endif /* tls.h */
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