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Diffstat (limited to 'linuxthreads/sysdeps/i386/useldt.h')
-rw-r--r--linuxthreads/sysdeps/i386/useldt.h314
1 files changed, 0 insertions, 314 deletions
diff --git a/linuxthreads/sysdeps/i386/useldt.h b/linuxthreads/sysdeps/i386/useldt.h
deleted file mode 100644
index 4ac82f1ab0..0000000000
--- a/linuxthreads/sysdeps/i386/useldt.h
+++ /dev/null
@@ -1,314 +0,0 @@
-/* Special definitions for ix86 machine using segment register based
- thread descriptor.
- Copyright (C) 1998, 2000, 2001, 2002 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Ulrich Drepper <drepper@cygnus.com>.
-
- 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; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
-#ifndef __ASSEMBLER__
-#include <stddef.h> /* For offsetof. */
-#include <stdlib.h> /* For abort(). */
-#include <sysdep.h>
-
-
-/* We don't want to include the kernel header. So duplicate the
- information. */
-
-/* Structure passed on `modify_ldt' call. */
-struct modify_ldt_ldt_s
-{
- unsigned int entry_number;
- unsigned long int base_addr;
- unsigned int limit;
- unsigned int seg_32bit:1;
- unsigned int contents:2;
- unsigned int read_exec_only:1;
- unsigned int limit_in_pages:1;
- unsigned int seg_not_present:1;
- unsigned int useable:1;
- unsigned int empty:25;
-};
-
-/* System call to set LDT entry. */
-extern int __modify_ldt (int, struct modify_ldt_ldt_s *, size_t);
-
-
-/* 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__ ("movl %%gs:%c1,%0" : "=r" (__self) \
- : "i" (offsetof (struct _pthread_descr_struct, \
- p_header.data.self))); \
- __self; \
-})
-
-
-/* Initialize the thread-unique value. Two possible ways to do it. */
-
-#define DO_MODIFY_LDT(descr, nr) \
-({ \
- struct modify_ldt_ldt_s ldt_entry = \
- { nr, (unsigned long int) (descr), 0xfffff /* 4GB in pages */, \
- 1, 0, 0, 1, 0, 1, 0 }; \
- if (__modify_ldt (1, &ldt_entry, sizeof (ldt_entry)) != 0) \
- abort (); \
- asm ("movw %w0, %%gs" : : "q" (nr * 8 + 7)); \
-})
-
-#ifdef __PIC__
-# define USETLS_EBX_ARG "r"
-# define USETLS_LOAD_EBX "xchgl %1, %%ebx\n\t"
-#else
-# define USETLS_EBX_ARG "b"
-# define USETLS_LOAD_EBX
-#endif
-
-/* When using the new set_thread_area call, we don't need to change %gs
- because we inherited the value set up in the main thread by TLS setup.
- We need to extract that value and set up the same segment in this
- thread. */
-#if USE_TLS
-# define DO_SET_THREAD_AREA_REUSE(nr) 1
-#else
-/* Without TLS, we do the initialization of the main thread, where NR == 0. */
-# define DO_SET_THREAD_AREA_REUSE(nr) (!__builtin_constant_p (nr) || (nr))
-#endif
-#define DO_SET_THREAD_AREA(descr, nr) \
-({ \
- int __gs; \
- if (DO_SET_THREAD_AREA_REUSE (nr)) \
- { \
- asm ("movw %%gs, %w0" : "=q" (__gs)); \
- struct modify_ldt_ldt_s ldt_entry = \
- { (__gs & 0xffff) >> 3, \
- (unsigned long int) (descr), 0xfffff /* 4GB in pages */, \
- 1, 0, 0, 1, 0, 1, 0 }; \
- \
- int __result; \
- __asm (USETLS_LOAD_EBX \
- "movl %2, %%eax\n\t" \
- "int $0x80\n\t" \
- USETLS_LOAD_EBX \
- : "=&a" (__result) \
- : USETLS_EBX_ARG (&ldt_entry), "i" (__NR_set_thread_area), \
- "m" (ldt_entry) \
- : "memory"); \
- if (__result == 0) \
- asm ("movw %w0, %%gs" :: "q" (__gs)); \
- else \
- __gs = -1; \
- } \
- else \
- { \
- struct modify_ldt_ldt_s ldt_entry = \
- { -1, \
- (unsigned long int) (descr), 0xfffff /* 4GB in pages */, \
- 1, 0, 0, 1, 0, 1, 0 }; \
- int __result; \
- __asm (USETLS_LOAD_EBX \
- "movl %2, %%eax\n\t" \
- "int $0x80\n\t" \
- USETLS_LOAD_EBX \
- : "=&a" (__result) \
- : USETLS_EBX_ARG (&ldt_entry), "i" (__NR_set_thread_area), \
- "m" (ldt_entry) \
- : "memory"); \
- if (__result == 0) \
- { \
- __gs = (ldt_entry.entry_number << 3) + 3; \
- asm ("movw %w0, %%gs" : : "q" (__gs)); \
- } \
- else \
- __gs = -1; \
- } \
- __gs; \
-})
-
-#if defined __ASSUME_SET_THREAD_AREA_SYSCALL
-# define INIT_THREAD_SELF(descr, nr) DO_SET_THREAD_AREA (descr, nr)
-#elif defined __NR_set_thread_area
-# define INIT_THREAD_SELF(descr, nr) \
-({ \
- if (__builtin_expect (__have_no_set_thread_area, 0) \
- || (DO_SET_THREAD_AREA (descr, DO_SET_THREAD_AREA_REUSE (nr)) == -1 \
- && (__have_no_set_thread_area = 1))) \
- DO_MODIFY_LDT (descr, nr); \
-})
-/* Defined in pspinlock.c. */
-extern int __have_no_set_thread_area;
-#else
-# define INIT_THREAD_SELF(descr, nr) DO_MODIFY_LDT (descr, nr)
-#endif
-
-/* Free resources associated with thread descriptor. */
-#ifdef __ASSUME_SET_THREAD_AREA_SYSCALL
-#define FREE_THREAD(descr, nr) do { } while (0)
-#elif defined __NR_set_thread_area
-#define FREE_THREAD(descr, nr) \
-{ \
- int __gs; \
- __asm__ __volatile__ ("movw %%gs, %w0" : "=q" (__gs)); \
- if (__builtin_expect (__gs & 4, 0)) \
- { \
- struct modify_ldt_ldt_s ldt_entry = \
- { nr, 0, 0, 0, 0, 1, 0, 1, 0, 0 }; \
- __modify_ldt (1, &ldt_entry, sizeof (ldt_entry)); \
- } \
-}
-#else
-#define FREE_THREAD(descr, nr) \
-{ \
- struct modify_ldt_ldt_s ldt_entry = \
- { nr, 0, 0, 0, 0, 1, 0, 1, 0, 0 }; \
- __modify_ldt (1, &ldt_entry, sizeof (ldt_entry)); \
-}
-#endif
-
-/* Read member of the thread descriptor directly. */
-#define THREAD_GETMEM(descr, member) \
-({ \
- __typeof__ (descr->member) __value; \
- if (sizeof (__value) == 1) \
- __asm__ __volatile__ ("movb %%gs:%P2,%b0" \
- : "=q" (__value) \
- : "0" (0), \
- "i" (offsetof (struct _pthread_descr_struct, \
- member))); \
- else if (sizeof (__value) == 4) \
- __asm__ __volatile__ ("movl %%gs:%P1,%0" \
- : "=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__ ("movl %%gs:%P1,%%eax\n\t" \
- "movl %%gs:%P2,%%edx" \
- : "=A" (__value) \
- : "i" (offsetof (struct _pthread_descr_struct, \
- member)), \
- "i" (offsetof (struct _pthread_descr_struct, \
- member) + 4)); \
- } \
- __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 %%gs:(%2),%b0" \
- : "=q" (__value) \
- : "0" (0), \
- "r" (offsetof (struct _pthread_descr_struct, \
- member))); \
- else if (sizeof (__value) == 4) \
- __asm__ __volatile__ ("movl %%gs:(%1),%0" \
- : "=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__ ("movl %%gs:(%1),%%eax\n\t" \
- "movl %%gs:4(%1),%%edx" \
- : "=&A" (__value) \
- : "r" (offsetof (struct _pthread_descr_struct, \
- member))); \
- } \
- __value; \
-})
-
-/* Same as THREAD_SETMEM, but the member offset can be non-constant. */
-#define THREAD_SETMEM(descr, member, value) \
-({ \
- __typeof__ (descr->member) __value = (value); \
- if (sizeof (__value) == 1) \
- __asm__ __volatile__ ("movb %0,%%gs:%P1" : \
- : "q" (__value), \
- "i" (offsetof (struct _pthread_descr_struct, \
- member))); \
- else if (sizeof (__value) == 4) \
- __asm__ __volatile__ ("movl %0,%%gs:%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__ ("movl %%eax,%%gs:%P1\n\n" \
- "movl %%edx,%%gs:%P2" : \
- : "A" (__value), \
- "i" (offsetof (struct _pthread_descr_struct, \
- member)), \
- "i" (offsetof (struct _pthread_descr_struct, \
- member) + 4)); \
- } \
-})
-
-/* Set member of the thread descriptor directly. */
-#define THREAD_SETMEM_NC(descr, member, value) \
-({ \
- __typeof__ (descr->member) __value = (value); \
- if (sizeof (__value) == 1) \
- __asm__ __volatile__ ("movb %0,%%gs:(%1)" : \
- : "q" (__value), \
- "r" (offsetof (struct _pthread_descr_struct, \
- member))); \
- else if (sizeof (__value) == 4) \
- __asm__ __volatile__ ("movl %0,%%gs:(%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__ ("movl %%eax,%%gs:(%1)\n\t" \
- "movl %%edx,%%gs:4(%1)" : \
- : "A" (__value), \
- "r" (offsetof (struct _pthread_descr_struct, \
- member))); \
- } \
-})
-#endif
-
-#if __ASSUME_LDT_WORKS > 0
-/* 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 8*1024*1024
-#endif
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