summaryrefslogtreecommitdiff
path: root/libpthread/linuxthreads/sysdeps/x86_64/pt-machine.h
diff options
context:
space:
mode:
Diffstat (limited to 'libpthread/linuxthreads/sysdeps/x86_64/pt-machine.h')
-rw-r--r--libpthread/linuxthreads/sysdeps/x86_64/pt-machine.h225
1 files changed, 225 insertions, 0 deletions
diff --git a/libpthread/linuxthreads/sysdeps/x86_64/pt-machine.h b/libpthread/linuxthreads/sysdeps/x86_64/pt-machine.h
new file mode 100644
index 000000000..b30ab8518
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/x86_64/pt-machine.h
@@ -0,0 +1,225 @@
+/* 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _PT_MACHINE_H
+#define _PT_MACHINE_H 1
+
+#ifndef __ASSEMBLER__
+# include <stddef.h> /* For offsetof. */
+# include <stdlib.h> /* For abort(). */
+# include <asm/prctl.h>
+
+
+# ifndef PT_EI
+# define PT_EI extern inline __attribute__ ((always_inline))
+# endif
+
+extern long int testandset (int *spinlock);
+extern int __compare_and_swap (long int *p, long int oldval, long int newval);
+
+/* 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;
+}
+
+/* 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. */
+#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 */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-26 20:10:29 +0000