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253eb3a0ac
Reported by Ulrich Weigand <uweigand@de.ibm.com>. * elf/stackguard-macros.h (STACK_CHK_GUARD): Add ia64 definition.
162 lines
4.7 KiB
C
162 lines
4.7 KiB
C
/* Definition for thread-local data handling. nptl/IA-64 version.
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Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef _TLS_H
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#define _TLS_H 1
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#include <dl-sysdep.h>
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#ifndef __ASSEMBLER__
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# include <stdbool.h>
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# include <stddef.h>
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# include <stdint.h>
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# include <stdlib.h>
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# include <list.h>
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/* Type for the dtv. */
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typedef union dtv
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{
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size_t counter;
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struct
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{
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void *val;
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bool is_static;
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} pointer;
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} dtv_t;
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typedef struct
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{
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dtv_t *dtv;
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void *private;
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} tcbhead_t;
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register struct pthread *__thread_self __asm__("r13");
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# define TLS_MULTIPLE_THREADS_IN_TCB 1
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#else /* __ASSEMBLER__ */
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# include <tcb-offsets.h>
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#endif
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/* We require TLS support in the tools. */
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#ifndef HAVE_TLS_SUPPORT
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# error "TLS support is required."
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#endif
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/* Signal that TLS support is available. */
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#define USE_TLS 1
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/* Alignment requirement for the stack. */
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#define STACK_ALIGN 16
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#ifndef __ASSEMBLER__
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/* Get system call information. */
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# include <sysdep.h>
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/* This is the size of the initial TCB. */
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# define TLS_INIT_TCB_SIZE sizeof (tcbhead_t)
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/* Alignment requirements for the initial TCB. */
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# define TLS_INIT_TCB_ALIGN __alignof__ (tcbhead_t)
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/* This is the size of the TCB. */
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# define TLS_TCB_SIZE sizeof (tcbhead_t)
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/* This is the size we need before TCB.
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If there is not any room for uintptr_t stack_guard in struct pthread's
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final padding, we need to put struct pthread 16 byte slower. */
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# define TLS_PRE_TCB_SIZE \
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(sizeof (struct pthread) \
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+ (PTHREAD_STRUCT_END_PADDING < sizeof (uintptr_t) \
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? ((sizeof (uintptr_t) + __alignof__ (struct pthread) - 1)\
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& ~(__alignof__ (struct pthread) - 1)) \
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: 0))
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/* Alignment requirements for the TCB. */
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# define TLS_TCB_ALIGN __alignof__ (struct pthread)
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/* The DTV is allocated at the TP; the TCB is placed elsewhere. */
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# define TLS_DTV_AT_TP 1
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/* Get the thread descriptor definition. */
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# include <nptl/descr.h>
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/* Install the dtv pointer. The pointer passed is to the element with
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index -1 which contain the length. */
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# define INSTALL_DTV(descr, dtvp) \
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((tcbhead_t *) (descr))->dtv = (dtvp) + 1
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/* Install new dtv for current thread. */
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# define INSTALL_NEW_DTV(DTV) \
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(((tcbhead_t *)__thread_self)->dtv = (DTV))
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/* Return dtv of given thread descriptor. */
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# define GET_DTV(descr) \
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(((tcbhead_t *) (descr))->dtv)
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#define THREAD_SELF_SYSINFO (((tcbhead_t *) __thread_self)->private)
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#define THREAD_SYSINFO(pd) \
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(((tcbhead_t *) ((char *) (pd) + TLS_PRE_TCB_SIZE))->private)
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#if defined NEED_DL_SYSINFO
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# define INIT_SYSINFO THREAD_SELF_SYSINFO = (void *) GLRO(dl_sysinfo)
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#else
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# define INIT_SYSINFO NULL
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#endif
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/* Code to initially initialize the thread pointer. This might need
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special attention since 'errno' is not yet available and if the
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operation can cause a failure 'errno' must not be touched. */
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# define TLS_INIT_TP(thrdescr, secondcall) \
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(__thread_self = (thrdescr), INIT_SYSINFO, NULL)
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/* Return the address of the dtv for the current thread. */
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# define THREAD_DTV() \
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(((tcbhead_t *)__thread_self)->dtv)
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/* Return the thread descriptor for the current thread. */
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# define THREAD_SELF \
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((struct pthread *) ((char *) __thread_self - TLS_PRE_TCB_SIZE))
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/* Magic for libthread_db to know how to do THREAD_SELF. */
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# define DB_THREAD_SELF REGISTER (64, 64, 13 * 8, -TLS_PRE_TCB_SIZE)
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/* Access to data in the thread descriptor is easy. */
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#define THREAD_GETMEM(descr, member) \
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descr->member
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#define THREAD_GETMEM_NC(descr, member, idx) \
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descr->member[idx]
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#define THREAD_SETMEM(descr, member, value) \
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descr->member = (value)
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#define THREAD_SETMEM_NC(descr, member, idx, value) \
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descr->member[idx] = (value)
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/* Set the stack guard field in TCB head. */
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#define THREAD_SET_STACK_GUARD(value) \
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(((uintptr_t *) __thread_self)[-1] = (value))
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#define THREAD_COPY_STACK_GUARD(descr) \
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(((uintptr_t *) ((char *) (descr) + TLS_PRE_TCB_SIZE))[-1] \
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= ((uintptr_t *) __thread_self)[-1])
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#endif /* __ASSEMBLER__ */
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#endif /* tls.h */
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