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Diffstat (limited to 'libpthread/nptl/sysdeps/x86_64/tls.h')
-rw-r--r--libpthread/nptl/sysdeps/x86_64/tls.h165
1 files changed, 134 insertions, 31 deletions
diff --git a/libpthread/nptl/sysdeps/x86_64/tls.h b/libpthread/nptl/sysdeps/x86_64/tls.h
index 516827b8e..7b40e3d57 100644
--- a/libpthread/nptl/sysdeps/x86_64/tls.h
+++ b/libpthread/nptl/sysdeps/x86_64/tls.h
@@ -1,5 +1,5 @@
/* Definition for thread-local data handling. nptl/x86_64 version.
- Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+ Copyright (C) 2002-2007, 2008, 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
@@ -20,12 +20,15 @@
#ifndef _TLS_H
#define _TLS_H 1
-#include <asm/prctl.h> /* For ARCH_SET_FS. */
#ifndef __ASSEMBLER__
+# include <asm/prctl.h> /* For ARCH_SET_FS. */
# include <stdbool.h>
# include <stddef.h>
# include <stdint.h>
# include <stdlib.h>
+# include <sysdep.h>
+# include <bits/wordsize.h>
+# include <xmmintrin.h>
/* Type for the dtv. */
@@ -42,13 +45,33 @@ typedef union dtv
typedef struct
{
- void *tcb; /* Pointer to the TCB. Not necessary the
+ void *tcb; /* Pointer to the TCB. Not necessarily the
thread descriptor used by libpthread. */
dtv_t *dtv;
void *self; /* Pointer to the thread descriptor. */
int multiple_threads;
+ int gscope_flag;
uintptr_t sysinfo;
uintptr_t stack_guard;
+ uintptr_t pointer_guard;
+ unsigned long int vgetcpu_cache[2];
+# ifndef __ASSUME_PRIVATE_FUTEX
+ int private_futex;
+# else
+ int __unused1;
+# endif
+# if __WORDSIZE == 64
+ int rtld_must_xmm_save;
+# endif
+ /* Reservation of some values for the TM ABI. */
+ void *__private_tm[5];
+# if __WORDSIZE == 64
+ long int __unused2;
+ /* Have space for the post-AVX register size. */
+ __m128 rtld_savespace_sse[8][4];
+
+ void *__padding[8];
+# endif
} tcbhead_t;
#else /* __ASSEMBLER__ */
@@ -57,9 +80,9 @@ typedef struct
/* We require TLS support in the tools. */
-#ifndef HAVE_TLS_SUPPORT
-# error "TLS support is required."
-#endif
+#define HAVE_TLS_SUPPORT 1
+#define HAVE___THREAD 1
+#define HAVE_TLS_MODEL_ATTRIBUTE 1
/* Signal that TLS support is available. */
#define USE_TLS 1
@@ -74,7 +97,7 @@ typedef struct
/* Get the thread descriptor definition. */
-# include <nptl/descr.h>
+# include <descr.h>
#ifndef LOCK_PREFIX
# ifdef UP
@@ -96,7 +119,12 @@ typedef struct
# define TLS_TCB_SIZE sizeof (struct pthread)
/* Alignment requirements for the TCB. */
-# define TLS_TCB_ALIGN __alignof__ (struct pthread)
+//# define TLS_TCB_ALIGN __alignof__ (struct pthread)
+// Normally the above would be correct But we have to store post-AVX
+// vector registers in the TCB and we want the storage to be aligned.
+// unfortunately there isn't yet a type for these values and hence no
+// 32-byte alignment requirement. Make this explicit, for now.
+# define TLS_TCB_ALIGN 32
/* The TCB can have any size and the memory following the address the
thread pointer points to is unspecified. Allocate the TCB there. */
@@ -120,9 +148,9 @@ typedef struct
/* Macros to load from and store into segment registers. */
# define TLS_GET_FS() \
- ({ int __seg; __asm ("movl %%fs, %0" : "=q" (__seg)); __seg; })
+ ({ int __seg; __asm__ ("movl %%fs, %0" : "=q" (__seg)); __seg; })
# define TLS_SET_FS(val) \
- __asm ("movl %0, %%fs" :: "q" (val))
+ __asm__ ("movl %0, %%fs" :: "q" (val))
/* Code to initially initialize the thread pointer. This might need
@@ -141,7 +169,7 @@ typedef struct
_head->self = _thrdescr; \
\
/* It is a simple syscall to set the %fs value for the thread. */ \
- asm volatile ("syscall" \
+ __asm__ volatile ("syscall" \
: "=a" (_result) \
: "0" ((unsigned long int) __NR_arch_prctl), \
"D" ((unsigned long int) ARCH_SET_FS), \
@@ -162,11 +190,11 @@ typedef struct
The contained asm must *not* be marked volatile since otherwise
assignments like
- pthread_descr self = thread_self();
+ pthread_descr self = thread_self();
do not get optimized away. */
# define THREAD_SELF \
({ struct pthread *__self; \
- asm ("movq %%fs:%c1,%q0" : "=r" (__self) \
+ __asm__ ("movq %%fs:%c1,%q0" : "=r" (__self) \
: "i" (offsetof (struct pthread, header.self))); \
__self;})
@@ -178,11 +206,11 @@ typedef struct
# define THREAD_GETMEM(descr, member) \
({ __typeof (descr->member) __value; \
if (sizeof (__value) == 1) \
- asm volatile ("movb %%fs:%P2,%b0" \
+ __asm__ volatile ("movb %%fs:%P2,%b0" \
: "=q" (__value) \
: "0" (0), "i" (offsetof (struct pthread, member))); \
else if (sizeof (__value) == 4) \
- asm volatile ("movl %%fs:%P1,%0" \
+ __asm__ volatile ("movl %%fs:%P1,%0" \
: "=r" (__value) \
: "i" (offsetof (struct pthread, member))); \
else \
@@ -192,7 +220,7 @@ typedef struct
4 or 8. */ \
abort (); \
\
- asm volatile ("movq %%fs:%P1,%q0" \
+ __asm__ volatile ("movq %%fs:%P1,%q0" \
: "=r" (__value) \
: "i" (offsetof (struct pthread, member))); \
} \
@@ -203,12 +231,12 @@ typedef struct
# define THREAD_GETMEM_NC(descr, member, idx) \
({ __typeof (descr->member[0]) __value; \
if (sizeof (__value) == 1) \
- asm volatile ("movb %%fs:%P2(%q3),%b0" \
+ __asm__ volatile ("movb %%fs:%P2(%q3),%b0" \
: "=q" (__value) \
: "0" (0), "i" (offsetof (struct pthread, member[0])), \
"r" (idx)); \
else if (sizeof (__value) == 4) \
- asm volatile ("movl %%fs:%P1(,%q2,4),%0" \
+ __asm__ volatile ("movl %%fs:%P1(,%q2,4),%0" \
: "=r" (__value) \
: "i" (offsetof (struct pthread, member[0])), "r" (idx));\
else \
@@ -218,7 +246,7 @@ typedef struct
4 or 8. */ \
abort (); \
\
- asm volatile ("movq %%fs:%P1(,%q2,8),%q0" \
+ __asm__ volatile ("movq %%fs:%P1(,%q2,8),%q0" \
: "=r" (__value) \
: "i" (offsetof (struct pthread, member[0])), \
"r" (idx)); \
@@ -238,11 +266,11 @@ typedef struct
/* Same as THREAD_SETMEM, but the member offset can be non-constant. */
# define THREAD_SETMEM(descr, member, value) \
({ if (sizeof (descr->member) == 1) \
- asm volatile ("movb %b0,%%fs:%P1" : \
+ __asm__ volatile ("movb %b0,%%fs:%P1" : \
: "iq" (value), \
"i" (offsetof (struct pthread, member))); \
else if (sizeof (descr->member) == 4) \
- asm volatile ("movl %0,%%fs:%P1" : \
+ __asm__ volatile ("movl %0,%%fs:%P1" : \
: IMM_MODE (value), \
"i" (offsetof (struct pthread, member))); \
else \
@@ -252,7 +280,7 @@ typedef struct
4 or 8. */ \
abort (); \
\
- asm volatile ("movq %q0,%%fs:%P1" : \
+ __asm__ volatile ("movq %q0,%%fs:%P1" : \
: IMM_MODE ((unsigned long int) value), \
"i" (offsetof (struct pthread, member))); \
}})
@@ -261,12 +289,12 @@ typedef struct
/* 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,%%fs:%P1(%q2)" : \
+ __asm__ volatile ("movb %b0,%%fs:%P1(%q2)" : \
: "iq" (value), \
"i" (offsetof (struct pthread, member[0])), \
"r" (idx)); \
else if (sizeof (descr->member[0]) == 4) \
- asm volatile ("movl %0,%%fs:%P1(,%q2,4)" : \
+ __asm__ volatile ("movl %0,%%fs:%P1(,%q2,4)" : \
: IMM_MODE (value), \
"i" (offsetof (struct pthread, member[0])), \
"r" (idx)); \
@@ -277,7 +305,7 @@ typedef struct
4 or 8. */ \
abort (); \
\
- asm volatile ("movq %q0,%%fs:%P1(,%q2,8)" : \
+ __asm__ volatile ("movq %q0,%%fs:%P1(,%q2,8)" : \
: IMM_MODE ((unsigned long int) value), \
"i" (offsetof (struct pthread, member[0])), \
"r" (idx)); \
@@ -285,11 +313,11 @@ typedef struct
/* Atomic compare and exchange on TLS, returning old value. */
-#define THREAD_ATOMIC_CMPXCHG_VAL(descr, member, newval, oldval) \
+# define THREAD_ATOMIC_CMPXCHG_VAL(descr, member, newval, oldval) \
({ __typeof (descr->member) __ret; \
__typeof (oldval) __old = (oldval); \
if (sizeof (descr->member) == 4) \
- asm volatile (LOCK_PREFIX "cmpxchgl %2, %%fs:%P3" \
+ __asm__ volatile (LOCK_PREFIX "cmpxchgl %2, %%fs:%P3" \
: "=a" (__ret) \
: "0" (__old), "r" (newval), \
"i" (offsetof (struct pthread, member))); \
@@ -299,10 +327,21 @@ typedef struct
__ret; })
+/* Atomic logical and. */
+# define THREAD_ATOMIC_AND(descr, member, val) \
+ (void) ({ if (sizeof ((descr)->member) == 4) \
+ __asm__ volatile (LOCK_PREFIX "andl %1, %%fs:%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) \
+# define THREAD_ATOMIC_BIT_SET(descr, member, bit) \
(void) ({ if (sizeof ((descr)->member) == 4) \
- asm volatile (LOCK_PREFIX "orl %1, %%fs:%P0" \
+ __asm__ volatile (LOCK_PREFIX "orl %1, %%fs:%P0" \
:: "i" (offsetof (struct pthread, member)), \
"ir" (1 << (bit))); \
else \
@@ -310,9 +349,9 @@ typedef struct
abort (); })
-#define CALL_THREAD_FCT(descr) \
+# define CALL_THREAD_FCT(descr) \
({ void *__res; \
- asm volatile ("movq %%fs:%P2, %%rdi\n\t" \
+ __asm__ volatile ("movq %%fs:%P2, %%rdi\n\t" \
"callq *%%fs:%P1" \
: "=a" (__res) \
: "i" (offsetof (struct pthread, start_routine)), \
@@ -329,6 +368,70 @@ typedef struct
((descr)->header.stack_guard \
= 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, %%fs:%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) ()
+
+
+# ifdef SHARED
+/* Defined in dl-trampoline.S. */
+extern void _dl_x86_64_save_sse (void);
+extern void _dl_x86_64_restore_sse (void);
+
+# define RTLD_CHECK_FOREIGN_CALL \
+ (THREAD_GETMEM (THREAD_SELF, header.rtld_must_xmm_save) != 0)
+
+/* NB: Don't use the xchg operation because that would imply a lock
+ prefix which is expensive and unnecessary. The cache line is also
+ not contested at all. */
+# define RTLD_ENABLE_FOREIGN_CALL \
+ int old_rtld_must_xmm_save = THREAD_GETMEM (THREAD_SELF, \
+ header.rtld_must_xmm_save); \
+ THREAD_SETMEM (THREAD_SELF, header.rtld_must_xmm_save, 1)
+
+# define RTLD_PREPARE_FOREIGN_CALL \
+ do if (THREAD_GETMEM (THREAD_SELF, header.rtld_must_xmm_save)) \
+ { \
+ _dl_x86_64_save_sse (); \
+ THREAD_SETMEM (THREAD_SELF, header.rtld_must_xmm_save, 0); \
+ } \
+ while (0)
+
+# define RTLD_FINALIZE_FOREIGN_CALL \
+ do { \
+ if (THREAD_GETMEM (THREAD_SELF, header.rtld_must_xmm_save) == 0) \
+ _dl_x86_64_restore_sse (); \
+ THREAD_SETMEM (THREAD_SELF, header.rtld_must_xmm_save, \
+ old_rtld_must_xmm_save); \
+ } while (0)
+# endif
+
+
#endif /* __ASSEMBLER__ */
#endif /* tls.h */
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