Revert "resolve merge"

This reverts commit 6b6ede3d15f04fe825cfa9f697507457e3640344.

1 files changed, 146 insertions, 10 deletions

diff --git a/libpthread/linuxthreads/sysdeps/x86_64/pt-machine.h b/libpthread/linuxthreads/sysdeps/x86_64/pt-machine.h
index ed1fa30b1..0e0851e1e 100644
--- a/libpthread/linuxthreads/sysdeps/x86_64/pt-machine.h
+++ b/libpthread/linuxthreads/sysdeps/x86_64/pt-machine.h
@@ -20,7 +20,7 @@
 #ifndef _PT_MACHINE_H
 #define _PT_MACHINE_H   1
 
-#include <features.h>
+# include <features.h>
 
 #ifndef __ASSEMBLER__
 # include <stddef.h>	/* For offsetof.  */
@@ -32,9 +32,6 @@
 #  define PT_EI __extern_always_inline
 # endif
 
-extern long int testandset (int *);
-extern int __compare_and_swap (long int *, long int, long int);
-
 /* Get some notion of the current stack.  Need not be exactly the top
    of the stack, just something somewhere in the current frame.  */
 # define CURRENT_STACK_FRAME  stack_pointer
@@ -43,14 +40,14 @@ register char * stack_pointer __asm__ ("%rsp") __attribute_used__;
 
 /* Spinlock implementation; required.  */
 PT_EI long int
-testandset (int *__spinlock)
+testandset (int *spinlock)
 {
   long int ret;
 
   __asm__ __volatile__ (
 	"xchgl %k0, %1"
-	: "=r"(ret), "=m"(*__spinlock)
-	: "0"(1), "m"(*__spinlock)
+	: "=r"(ret), "=m"(*spinlock)
+	: "0"(1), "m"(*spinlock)
 	: "memory");
 
   return ret;
@@ -61,18 +58,157 @@ testandset (int *__spinlock)
 # define HAS_COMPARE_AND_SWAP
 
 PT_EI int
-__compare_and_swap (long int *__p, long int __oldval, long int __newval)
+__compare_and_swap (long int *p, long int oldval, long int newval)
 {
   char ret;
   long int readval;
 
   __asm__ __volatile__ ("lock; cmpxchgq %3, %1; sete %0"
-			: "=q" (ret), "=m" (*__p), "=a" (readval)
-			: "r" (__newval), "m" (*__p), "a" (__oldval)
+			: "=q" (ret), "=m" (*p), "=a" (readval)
+			: "r" (newval), "m" (*p), "a" (oldval)
 			: "memory");
   return ret;
 }
 
+/* Return the thread descriptor for the current thread.
+
+   The contained asm must *not* be marked volatile since otherwise
+   assignments like
+	pthread_descr self = thread_self();
+   do not get optimized away.  */
+# define THREAD_SELF \
+({									      \
+  register pthread_descr __self;					      \
+  __asm__ ("movq %%fs:%c1,%0" : "=r" (__self)				      \
+	   : "i" (offsetof (struct _pthread_descr_struct,		      \
+			    p_header.data.self)));			      \
+  __self;								      \
+})
+
+/* Prototype for the system call.  */
+extern int arch_prctl (int __code, unsigned long __addr);
+
+/* Initialize the thread-unique value.  */
+# define INIT_THREAD_SELF(descr, nr) \
+{									      \
+  if (arch_prctl (ARCH_SET_FS, (unsigned long)descr) != 0)		      \
+    abort ();								      \
+}
+
+/* Read member of the thread descriptor directly.  */
+# define THREAD_GETMEM(descr, member) \
+({									      \
+  __typeof__ (descr->member) __value;					      \
+  if (sizeof (__value) == 1)						      \
+    __asm__ __volatile__ ("movb %%fs:%P2,%b0"				      \
+			  : "=q" (__value)				      \
+			  : "0" (0),					      \
+			    "i" (offsetof (struct _pthread_descr_struct,      \
+					   member)));			      \
+  else if (sizeof (__value) == 4)					      \
+    __asm__ __volatile__ ("movl %%fs:%P2,%k0"				      \
+			  : "=r" (__value)				      \
+			  : "0" (0),					      \
+			    "i" (offsetof (struct _pthread_descr_struct,      \
+					   member)));			      \
+  else									      \
+    {									      \
+      if (sizeof (__value) != 8)					      \
+	/* There should not be any value with a size other than 1, 4 or 8.  */\
+	abort ();							      \
+									      \
+      __asm__ __volatile__ ("movq %%fs:%P1,%0"				      \
+			    : "=r" (__value)				      \
+			    : "i" (offsetof (struct _pthread_descr_struct,    \
+					     member)));			      \
+    }									      \
+  __value;								      \
+})
+
+/* Same as THREAD_GETMEM, but the member offset can be non-constant.  */
+# define THREAD_GETMEM_NC(descr, member) \
+({									      \
+  __typeof__ (descr->member) __value;					      \
+  if (sizeof (__value) == 1)						      \
+    __asm__ __volatile__ ("movb %%fs:(%2),%b0"				      \
+			  : "=q" (__value)				      \
+			  : "0" (0),					      \
+			    "r" (offsetof (struct _pthread_descr_struct,      \
+					   member)));			      \
+  else if (sizeof (__value) == 4)					      \
+    __asm__ __volatile__ ("movl %%fs:(%2),%k0"				      \
+			  : "=r" (__value)				      \
+			  : "0" (0),					      \
+			    "r" (offsetof (struct _pthread_descr_struct,      \
+					   member)));			      \
+  else									      \
+    {									      \
+      if (sizeof (__value) != 8)					      \
+	/* There should not be any value with a size other than 1, 4 or 8.  */\
+	abort ();							      \
+									      \
+      __asm__ __volatile__ ("movq %%fs:(%1),%0"				      \
+			    : "=r" (__value)				      \
+			    : "r" (offsetof (struct _pthread_descr_struct,    \
+					     member)));			      \
+    }									      \
+  __value;								      \
+})
+
+/* Set member of the thread descriptor directly.  */
+# define THREAD_SETMEM(descr, member, value) \
+({									      \
+  __typeof__ (descr->member) __value = (value);				      \
+  if (sizeof (__value) == 1)						      \
+    __asm__ __volatile__ ("movb %0,%%fs:%P1" :				      \
+			  : "q" (__value),				      \
+			    "i" (offsetof (struct _pthread_descr_struct,      \
+					   member)));			      \
+  else if (sizeof (__value) == 4)					      \
+    __asm__ __volatile__ ("movl %k0,%%fs:%P1" :				      \
+			  : "r" (__value),				      \
+			    "i" (offsetof (struct _pthread_descr_struct,      \
+					   member)));			      \
+  else									      \
+    {									      \
+      if (sizeof (__value) != 8)					      \
+	/* There should not be any value with a size other than 1, 4 or 8.  */\
+	abort ();							      \
+									      \
+      __asm__ __volatile__ ("movq %0,%%fs:%P1" :			      \
+			    : "r" (__value),				      \
+			      "i" (offsetof (struct _pthread_descr_struct,    \
+					     member)));			      \
+    }									      \
+})
+
+/* Same as THREAD_SETMEM, but the member offset can be non-constant.  */
+# define THREAD_SETMEM_NC(descr, member, value) \
+({									      \
+  __typeof__ (descr->member) __value = (value);				      \
+  if (sizeof (__value) == 1)						      \
+    __asm__ __volatile__ ("movb %0,%%fs:(%1)" :				      \
+			  : "q" (__value),				      \
+			    "r" (offsetof (struct _pthread_descr_struct,      \
+					   member)));			      \
+  else if (sizeof (__value) == 4)					      \
+    __asm__ __volatile__ ("movl %k0,%%fs:(%1)" :			      \
+			  : "r" (__value),				      \
+			    "r" (offsetof (struct _pthread_descr_struct,      \
+					   member)));			      \
+  else									      \
+    {									      \
+      if (sizeof (__value) != 8)					      \
+	/* There should not be any value with a size other than 1, 4 or 8.  */\
+	abort ();							      \
+									      \
+      __asm__ __volatile__ ("movq %0,%%fs:(%1)"	:			      \
+			    : "r" (__value),				      \
+			      "r" (offsetof (struct _pthread_descr_struct,    \
+					     member)));			      \
+    }									      \
+})
+
 #endif /* !__ASSEMBLER__ */
 
 /* We want the OS to assign stack addresses.  */