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-rw-r--r--libpthread/nptl/sysdeps/x86_64/Makefile9
-rw-r--r--libpthread/nptl/sysdeps/x86_64/Makefile.arch52
-rw-r--r--libpthread/nptl/sysdeps/x86_64/pthreaddef.h17
-rw-r--r--libpthread/nptl/sysdeps/x86_64/sysdep.h114
-rw-r--r--libpthread/nptl/sysdeps/x86_64/tls.h165
5 files changed, 307 insertions, 50 deletions
diff --git a/libpthread/nptl/sysdeps/x86_64/Makefile b/libpthread/nptl/sysdeps/x86_64/Makefile
index 6e24a26cd..2f0d88f30 100644
--- a/libpthread/nptl/sysdeps/x86_64/Makefile
+++ b/libpthread/nptl/sysdeps/x86_64/Makefile
@@ -1,4 +1,4 @@
-# Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+# 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
@@ -21,8 +21,7 @@ gen-as-const-headers += tcb-offsets.sym
endif
ifeq ($(subdir),nptl)
-# P4s have problems with 4M aliasing. We disturb the allocation of stacks
-# just enough so the subsequent allocations do not use stack address
-# (mod 4M) == 0.
-CFLAGS-pthread_create.c += -DMULTI_PAGE_ALIASING=65536
+CFLAGS-pthread_create.c += -mpreferred-stack-boundary=4
+CFLAGS-tst-align.c += -mpreferred-stack-boundary=4
+CFLAGS-tst-align2.c += -mpreferred-stack-boundary=4
endif
diff --git a/libpthread/nptl/sysdeps/x86_64/Makefile.arch b/libpthread/nptl/sysdeps/x86_64/Makefile.arch
new file mode 100644
index 000000000..b99a0da0e
--- /dev/null
+++ b/libpthread/nptl/sysdeps/x86_64/Makefile.arch
@@ -0,0 +1,52 @@
+# Makefile for uClibc NPTL
+#
+# Copyright (C) 2005 Steven J. Hill <sjhill@uclibc.org>
+#
+# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+#
+
+libpthread_CSRC = pthread_spin_lock.c
+libpthread_SSRC = pthread_spin_trylock.S
+
+CFLAGS-pthread_spin_lock.c += -D_GNU_SOURCE
+
+CFLAGS-x86_64 = $(SSP_ALL_CFLAGS)
+#CFLAGS:=$(CFLAGS:-O1=-O2)
+
+PTHREAD_ARCH_DIR := $(top_srcdir)libpthread/nptl/sysdeps/x86_64
+PTHREAD_ARCH_OUT := $(top_builddir)libpthread/nptl/sysdeps/x86_64
+PTHREAD_ARCH_OBJ := $(patsubst %.S,$(PTHREAD_ARCH_OUT)/%.o,$(libpthread_SSRC))
+PTHREAD_ARCH_OBJ += $(patsubst %.c,$(PTHREAD_ARCH_OUT)/%.o,$(libpthread_CSRC))
+
+ifeq ($(DOPIC),y)
+libpthread-a-y += $(PTHREAD_ARCH_OBJ:.o=.os)
+else
+libpthread-a-y += $(PTHREAD_ARCH_OBJ)
+endif
+libpthread-so-y += $(PTHREAD_ARCH_OBJ:.o=.oS)
+
+libpthread-nomulti-y += $(PTHREAD_ARCH_OBJ)
+
+objclean-y += nptl_arch_clean
+headers-y += $(PTHREAD_ARCH_OUT)/tcb-offsets.h
+headers_clean-y += nptl_arch_headers_clean
+
+#
+# Create 'tcb-offsets.h' header file.
+#
+CFLAGS-tcb-offsets.c = -S
+
+$(PTHREAD_ARCH_OUT)/tcb-offsets.c: $(PTHREAD_ARCH_DIR)/tcb-offsets.sym
+ $(do_awk) $(top_srcdir)extra/scripts/gen-as-const.awk $< > $@
+
+$(PTHREAD_ARCH_OUT)/tcb-offsets.s: $(PTHREAD_ARCH_OUT)/tcb-offsets.c
+ $(compile.c)
+
+$(PTHREAD_ARCH_OUT)/tcb-offsets.h: $(PTHREAD_ARCH_OUT)/tcb-offsets.s
+ @sed -n "s/^.*@@@name@@@\([^@]*\)@@@value@@@[^0-9Xxa-fA-F-]*\([0-9Xxa-fA-F-][0-9Xxa-fA-F-]*\).*@@@end@@@.*$\/#define \1 \2/p" $< > $@
+
+nptl_arch_headers_clean:
+ $(do_rm) $(addprefix $(PTHREAD_ARCH_OUT)/tcb-offsets., c s h)
+
+nptl_arch_clean:
+ $(do_rm) $(addprefix $(PTHREAD_ARCH_OUT)/*., o os oS)
diff --git a/libpthread/nptl/sysdeps/x86_64/pthreaddef.h b/libpthread/nptl/sysdeps/x86_64/pthreaddef.h
index 27896a445..b33c18638 100644
--- a/libpthread/nptl/sysdeps/x86_64/pthreaddef.h
+++ b/libpthread/nptl/sysdeps/x86_64/pthreaddef.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2003, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
@@ -33,22 +33,11 @@
/* Location of current stack frame. The frame pointer is not usable. */
#define CURRENT_STACK_FRAME \
- ({ char *frame; asm ("movq %%rsp, %0" : "=r" (frame)); frame; })
-
-
-/* We prefer to have the stack allocated in the low 4GB since this
- allows faster context switches. */
-#define ARCH_MAP_FLAGS MAP_32BIT
-
-/* If it is not possible to allocate memory there retry without that
- flag. */
-#define ARCH_RETRY_MMAP(size) \
- mmap (NULL, size, PROT_READ | PROT_WRITE | PROT_EXEC, \
- MAP_PRIVATE | MAP_ANONYMOUS, -1, 0)
+ ({ char *frame; __asm__ ("movq %%rsp, %0" : "=r" (frame)); frame; })
/* XXX Until we have a better place keep the definitions here. */
/* While there is no such syscall. */
#define __exit_thread_inline(val) \
- asm volatile ("syscall" :: "a" (__NR_exit), "D" (val))
+ __asm__ volatile ("syscall" :: "a" (__NR_exit), "D" (val))
diff --git a/libpthread/nptl/sysdeps/x86_64/sysdep.h b/libpthread/nptl/sysdeps/x86_64/sysdep.h
new file mode 100644
index 000000000..122270f91
--- /dev/null
+++ b/libpthread/nptl/sysdeps/x86_64/sysdep.h
@@ -0,0 +1,114 @@
+/* Assembler macros for x86-64.
+ Copyright (C) 2001, 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <sysdeps/generic/sysdep.h>
+
+#ifdef __ASSEMBLER__
+
+/* Syntactic details of assembler. */
+
+#ifdef HAVE_ELF
+
+/* ELF uses byte-counts for .align, most others use log2 of count of bytes. */
+#define ALIGNARG(log2) 1<<log2
+/* For ELF we need the `.type' directive to make shared libs work right. */
+#define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg;
+#define ASM_SIZE_DIRECTIVE(name) .size name,.-name;
+
+/* In ELF C symbols are asm symbols. */
+#undef NO_UNDERSCORES
+#define NO_UNDERSCORES
+
+#else
+
+#define ALIGNARG(log2) log2
+#define ASM_TYPE_DIRECTIVE(name,type) /* Nothing is specified. */
+#define ASM_SIZE_DIRECTIVE(name) /* Nothing is specified. */
+
+#endif
+
+
+/* Define an entry point visible from C. */
+#define ENTRY(name) \
+ ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name); \
+ ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function) \
+ .align ALIGNARG(4); \
+ C_LABEL(name) \
+ cfi_startproc; \
+ CALL_MCOUNT
+
+#undef END
+#define END(name) \
+ cfi_endproc; \
+ ASM_SIZE_DIRECTIVE(name)
+
+/* If compiled for profiling, call `mcount' at the start of each function. */
+#ifdef PROF
+/* The mcount code relies on a normal frame pointer being on the stack
+ to locate our caller, so push one just for its benefit. */
+#define CALL_MCOUNT \
+ pushq %rbp; \
+ cfi_adjust_cfa_offset(8); \
+ movq %rsp, %rbp; \
+ cfi_def_cfa_register(%rbp); \
+ call JUMPTARGET(mcount); \
+ popq %rbp; \
+ cfi_def_cfa(rsp,8);
+#else
+#define CALL_MCOUNT /* Do nothing. */
+#endif
+
+#ifdef NO_UNDERSCORES
+/* Since C identifiers are not normally prefixed with an underscore
+ on this system, the asm identifier `syscall_error' intrudes on the
+ C name space. Make sure we use an innocuous name. */
+#define syscall_error __syscall_error
+#define mcount _mcount
+#endif
+
+#define PSEUDO(name, syscall_name, args) \
+lose: \
+ jmp JUMPTARGET(syscall_error) \
+ .globl syscall_error; \
+ ENTRY (name) \
+ DO_CALL (syscall_name, args); \
+ jb lose
+
+#undef PSEUDO_END
+#define PSEUDO_END(name) \
+ END (name)
+
+#undef JUMPTARGET
+#ifdef PIC
+#define JUMPTARGET(name) name##@PLT
+#else
+#define JUMPTARGET(name) name
+#endif
+
+/* Local label name for asm code. */
+#ifndef L
+# ifdef HAVE_ELF
+/* ELF-like local names start with `.L'. */
+# define L(name) .L##name
+# else
+# define L(name) name
+# endif
+#endif
+
+#endif /* __ASSEMBLER__ */
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 */
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-23 00:40:23 +0000