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authorWaldemar Brodkorb <wbx@openadk.org>2015-02-14 23:04:02 -0600
committerWaldemar Brodkorb <wbx@openadk.org>2015-02-14 23:04:02 -0600
commite1e46622ac0fce73d802fa4a8a2e83cc25cd9e7a (patch)
tree2c8d14e4dcc733f4227f0984ed05da5826b13acd /libpthread/linuxthreads.old/sysdeps/x86_64/pt-machine.h
parent6b6ede3d15f04fe825cfa9f697507457e3640344 (diff)
Revert "resolve merge"
This reverts commit 6b6ede3d15f04fe825cfa9f697507457e3640344.
Diffstat (limited to 'libpthread/linuxthreads.old/sysdeps/x86_64/pt-machine.h')
-rw-r--r--libpthread/linuxthreads.old/sysdeps/x86_64/pt-machine.h87
1 files changed, 87 insertions, 0 deletions
diff --git a/libpthread/linuxthreads.old/sysdeps/x86_64/pt-machine.h b/libpthread/linuxthreads.old/sysdeps/x86_64/pt-machine.h
new file mode 100644
index 000000000..ed1fa30b1
--- /dev/null
+++ b/libpthread/linuxthreads.old/sysdeps/x86_64/pt-machine.h
@@ -0,0 +1,87 @@
+/* Machine-dependent pthreads configuration and inline functions.
+ x86-64 version.
+ Copyright (C) 2001, 2002, 2003, 2004 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, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _PT_MACHINE_H
+#define _PT_MACHINE_H 1
+
+#include <features.h>
+
+#ifndef __ASSEMBLER__
+# include <stddef.h> /* For offsetof. */
+# include <stdlib.h> /* For abort(). */
+# include <asm/prctl.h>
+
+
+# ifndef PT_EI
+# 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
+register char * stack_pointer __asm__ ("%rsp") __attribute_used__;
+
+
+/* Spinlock implementation; required. */
+PT_EI long int
+testandset (int *__spinlock)
+{
+ long int ret;
+
+ __asm__ __volatile__ (
+ "xchgl %k0, %1"
+ : "=r"(ret), "=m"(*__spinlock)
+ : "0"(1), "m"(*__spinlock)
+ : "memory");
+
+ return ret;
+}
+
+
+/* Compare-and-swap for semaphores. */
+# define HAS_COMPARE_AND_SWAP
+
+PT_EI int
+__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)
+ : "memory");
+ return ret;
+}
+
+#endif /* !__ASSEMBLER__ */
+
+/* We want the OS to assign stack addresses. */
+#define FLOATING_STACKS 1
+
+/* Maximum size of the stack if the rlimit is unlimited. */
+#define ARCH_STACK_MAX_SIZE 32*1024*1024
+
+/* The ia32e really want some help to prevent overheating. */
+#define BUSY_WAIT_NOP __asm__ ("rep; nop")
+
+#endif /* pt-machine.h */