From 160bb4094514b41e70a4701235fb622c0061442b Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Wed, 25 Sep 2002 01:58:37 +0000 Subject: * csu/Versions: Use %include to get USE_TLS defined. (libc: GLIBC_2.0) [USE_TLS && HAVE___THREAD]: Remove _errno, errno. (libc: GLIBC_2.3) [USE_TLS && HAVE___THREAD]: Put errno here instead. * resolv/Versions: Use %include to get USE_TLS defined. (libc: GLIBC_2.0) [USE_TLS && HAVE___THREAD]: Remove _h_errno, h_errno, and _res. (libc: GLIBC_2.3) [USE_TLS && HAVE___THREAD]: Put h_errno, _res here. * elf/tls-macros.h [__x86_64__] (TLS_LE, TLS_IE, TLS_LD, TLS_GD): New macros for x86-64. * sysdeps/unix/sysv/linux/alpha/bits/time.h: File removed. It was indentical to the linux/bits/time.h file. * nscd/nscd_gethst_r.c (nscd_gethst_r): Add a cast to silence warning. * resolv/gethnamaddr.c (gethostbyaddr): Use socklen_t for SIZE. --- linuxthreads/sysdeps/x86_64/tls.h | 119 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 119 insertions(+) create mode 100644 linuxthreads/sysdeps/x86_64/tls.h (limited to 'linuxthreads/sysdeps') diff --git a/linuxthreads/sysdeps/x86_64/tls.h b/linuxthreads/sysdeps/x86_64/tls.h new file mode 100644 index 0000000..17773d5 --- /dev/null +++ b/linuxthreads/sysdeps/x86_64/tls.h @@ -0,0 +1,119 @@ +/* Definitions for thread-local data handling. linuxthreads/x86-64 version. + Copyright (C) 2002 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 _TLS_H +#define _TLS_H + +# include + +#ifndef __ASSEMBLER__ +# include + +/* 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 + + +#ifdef HAVE_TLS_SUPPORT + +/* Signal that TLS support is available. */ +# define USE_TLS 1 + +# ifndef __ASSEMBLER__ +/* Get system call information. */ +# include + +/* Get the thread descriptor definition. */ +# include + +/* 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) + +/* 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; \ + long int _result; \ + \ + head->tcb = _descr; \ + /* For now the thread descriptor is at the same address. */ \ + head->self = _descr; \ + \ + asm volatile ("syscall" \ + : "=a" (_result) \ + : "0" ((unsigned long int) __NR_arch_prctl), \ + "D" ((unsigned long int) ARCH_SET_FS), \ + "S" (_descr) \ + : "memory", "cc", "r11", "cx"); \ + _result ? -1 : 0; \ + }) + +/* 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 /* HAVE_TLS_SUPPORT */ +#endif /* __ASSEMBLER__ */ + +#endif /* tls.h */ -- cgit v1.1