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authorWaldemar Brodkorb <wbx@uclibc-ng.org>2016-05-18 18:41:24 +0200
committerWaldemar Brodkorb <wbx@uclibc-ng.org>2016-05-18 18:41:24 +0200
commit6a8ccc95528f5e86a8770ed15ce89609b5b3dee9 (patch)
treebbd4df35b4d4a6a8b00d7a5e61fb2668b850ad62 /libpthread/linuxthreads.old/sysdeps/i386/tls.h
parent398a27a5b323956344b4f831d892fed3bd9813c7 (diff)
remove linuxthreads.new, rename linuxthreads.old
Linuxthreads.new isn't really useful with the existence of NPTL/TLS for well supported architectures. There is no reason to use LT.new for ARM/MIPS or other architectures supporting NPTL/TLS. It is not available for noMMU architectures like Blackfin or FR-V. To simplify the live of the few uClibc-ng developers, LT.new is removed and LT.old is renamed to LT. LINUXTHREADS_OLD -> UCLIBC_HAS_LINUXTHREADS
Diffstat (limited to 'libpthread/linuxthreads.old/sysdeps/i386/tls.h')
-rw-r--r--libpthread/linuxthreads.old/sysdeps/i386/tls.h184
1 files changed, 0 insertions, 184 deletions
diff --git a/libpthread/linuxthreads.old/sysdeps/i386/tls.h b/libpthread/linuxthreads.old/sysdeps/i386/tls.h
deleted file mode 100644
index 4469f0776..000000000
--- a/libpthread/linuxthreads.old/sysdeps/i386/tls.h
+++ /dev/null
@@ -1,184 +0,0 @@
-/* Definition for thread-local data handling. linuxthreads/i386 version.
- Copyright (C) 2002, 2003, 2004, 2005 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 _TLS_H
-#define _TLS_H
-
-# include <pt-machine.h>
-
-#ifndef __ASSEMBLER__
-# include <stdbool.h>
-# include <stddef.h>
-# include <stdint.h>
-
-/* Type for the dtv. */
-typedef union dtv
-{
- size_t counter;
- void *pointer;
-} dtv_t;
-
-
-typedef struct
-{
- void *tcb; /* Pointer to the TCB. Not necessary the
- thread descriptor used by libpthread. */
- dtv_t *dtv;
- void *self; /* Pointer to the thread descriptor. */
-} tcbhead_t;
-#endif
-
-
-/* We can support TLS only if the floating-stack support is available. */
-#if defined FLOATING_STACKS && defined HAVE_TLS_SUPPORT
-
-/* Signal that TLS support is available. */
-//# define USE_TLS 1
-
-# ifndef __ASSEMBLER__
-/* Get system call information. */
-# include <sysdep.h>
-
-
-/* Get the thread descriptor definition. */
-# include <linuxthreads/descr.h>
-
-/* This is the size of the initial TCB. */
-# define TLS_INIT_TCB_SIZE sizeof (tcbhead_t)
-
-/* Alignment requirements for the initial TCB. */
-# define TLS_INIT_TCB_ALIGN __alignof__ (tcbhead_t)
-
-/* This is the size of the TCB. */
-# define TLS_TCB_SIZE sizeof (struct _pthread_descr_struct)
-
-/* Alignment requirements for the TCB. */
-# define TLS_TCB_ALIGN __alignof__ (struct _pthread_descr_struct)
-
-/* The TCB can have any size and the memory following the address the
- thread pointer points to is unspecified. Allocate the TCB there. */
-# define TLS_TCB_AT_TP 1
-
-
-/* Install the dtv pointer. The pointer passed is to the element with
- index -1 which contain the length. */
-# define INSTALL_DTV(descr, dtvp) \
- ((tcbhead_t *) (descr))->dtv = (dtvp) + 1
-
-/* Install new dtv for current thread. */
-# define INSTALL_NEW_DTV(dtv) \
- ({ struct _pthread_descr_struct *__descr; \
- THREAD_SETMEM (__descr, p_header.data.dtvp, (dtv)); })
-
-/* Return dtv of given thread descriptor. */
-# define GET_DTV(descr) \
- (((tcbhead_t *) (descr))->dtv)
-
-# ifdef __PIC__
-# define TLS_EBX_ARG "r"
-# define TLS_LOAD_EBX "xchgl %3, %%ebx\n\t"
-# else
-# define TLS_EBX_ARG "b"
-# define TLS_LOAD_EBX
-# endif
-
-# define TLS_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 }; \
- int result; \
- __asm__ __volatile__ (TLS_LOAD_EBX \
- "int $0x80\n\t" \
- TLS_LOAD_EBX \
- : "=a" (result) \
- : "0" (__NR_modify_ldt), \
- /* The extra argument with the "m" constraint is necessary \
- to let the compiler know that we are accessing LDT_ENTRY \
- here. */ \
- "m" (ldt_entry), TLS_EBX_ARG (1), "c" (&ldt_entry), \
- "d" (sizeof (ldt_entry))); \
- __builtin_expect (result, 0) != 0 ? -1 : nr * 8 + 7; \
-})
-
-# define TLS_DO_SET_THREAD_AREA(descr, secondcall) \
-({ \
- 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; \
- if (secondcall) \
- ldt_entry.entry_number = ({ int _gs; \
- __asm__ ("movw %%gs, %w0" : "=q" (_gs)); \
- (_gs & 0xffff) >> 3; }); \
- __asm__ __volatile__ (TLS_LOAD_EBX \
- "int $0x80\n\t" \
- TLS_LOAD_EBX \
- : "=a" (result), "=m" (ldt_entry.entry_number) \
- : "0" (__NR_set_thread_area), \
- /* The extra argument with the "m" constraint is necessary \
- to let the compiler know that we are accessing LDT_ENTRY \
- here. */ \
- TLS_EBX_ARG (&ldt_entry), "m" (ldt_entry)); \
- __builtin_expect (result, 0) == 0 ? ldt_entry.entry_number * 8 + 3 : -1; \
-})
-
-# ifdef __ASSUME_SET_THREAD_AREA_SYSCALL
-# define TLS_SETUP_GS_SEGMENT(descr, secondcall) \
- TLS_DO_SET_THREAD_AREA (descr, firstcall)
-# elif defined __NR_set_thread_area
-# define TLS_SETUP_GS_SEGMENT(descr, secondcall) \
- ({ int __seg = TLS_DO_SET_THREAD_AREA (descr, secondcall); \
- __seg == -1 ? TLS_DO_MODIFY_LDT (descr, 0) : __seg; })
-# else
-# define TLS_SETUP_GS_SEGMENT(descr, secondcall) \
- TLS_DO_MODIFY_LDT ((descr), 0)
-# endif
-
-/* Code to initially initialize the thread pointer. This might need
- special attention since 'errno' is not yet available and if the
- operation can cause a failure 'errno' must not be touched. */
-# define TLS_INIT_TP(descr, secondcall) \
- ({ \
- void *_descr = (descr); \
- tcbhead_t *head = _descr; \
- int __gs; \
- \
- head->tcb = _descr; \
- /* For now the thread descriptor is at the same address. */ \
- head->self = _descr; \
- \
- __gs = TLS_SETUP_GS_SEGMENT (_descr, secondcall); \
- if (__builtin_expect (__gs, 7) != -1) \
- { \
- __asm__ ("movw %w0, %%gs" : : "q" (__gs)); \
- __gs = 0; \
- } \
- __gs; \
- })
-
-
-/* Return the address of the dtv for the current thread. */
-# define THREAD_DTV() \
- ({ struct _pthread_descr_struct *__descr; \
- THREAD_GETMEM (__descr, p_header.data.dtvp); })
-
-# endif /* FLOATING_STACKS && HAVE_TLS_SUPPORT */
-#endif /* __ASSEMBLER__ */
-
-#endif /* tls.h */