2018-12-21 01:48:04 +00:00
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/* Definitions for thread-local data handling. NPTL/C-SKY version.
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2019-01-01 00:11:28 +00:00
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Copyright (C) 2018-2019 Free Software Foundation, Inc.
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2018-12-21 01:48:04 +00:00
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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, see
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Prefer https to http for gnu.org and fsf.org URLs
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
2019-09-07 05:40:42 +00:00
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<https://www.gnu.org/licenses/>. */
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2018-12-21 01:48:04 +00:00
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#ifndef _TLS_H
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#define _TLS_H 1
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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 <dl-dtv.h>
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/* Define r31 as thread pointer register. */
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# define READ_THREAD_POINTER() \
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({ void *__result; \
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__asm__ __volatile__ ("mov %0, r31" \
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: "=r" (__result)); \
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__result; })
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#else
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# include <tcb-offsets.h>
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/* Define r31 as thread pointer register. */
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# define READ_THREAD_POINTER() \
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mov r0, r31;
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#endif /* __ASSEMBLER__ */
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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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/* The TP points to the start of the thread blocks. */
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# define TLS_DTV_AT_TP 1
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# define TLS_TCB_AT_TP 0
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/* Get the thread descriptor definition. */
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# include <nptl/descr.h>
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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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/* 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 8
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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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/* Alignment requirements for the TCB. */
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# define TLS_TCB_ALIGN 8
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/* This is the size we need before TCB. */
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# define TLS_PRE_TCB_SIZE sizeof (struct pthread)
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/* The thread pointer tp points to the end of the TCB.
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The pthread_descr structure is immediately in front of the TCB. */
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# define TLS_TCB_OFFSET 0
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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(tcbp, dtvp) \
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(((tcbhead_t *) (tcbp))->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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(THREAD_DTV() = (dtv))
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/* Return dtv of given thread descriptor. */
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# define GET_DTV(tcbp) \
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(((tcbhead_t *) (tcbp))->dtv)
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# define TLS_DEFINE_INIT_TP(tp, pd) void *tp = (pd) + 1
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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(tcbp) \
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({ INTERNAL_SYSCALL_DECL (err); \
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long result_var; \
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result_var = INTERNAL_SYSCALL (set_thread_area, err, 1, \
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(char *) (tcbp) + TLS_TCB_OFFSET); \
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INTERNAL_SYSCALL_ERROR_P (result_var, err) \
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? "unknown error" : 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 *) (READ_THREAD_POINTER () - TLS_TCB_OFFSET))->dtv)
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/* Return the thread descriptor for the current thread. */
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# undef THREAD_SELF
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# define THREAD_SELF \
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((struct pthread *) (READ_THREAD_POINTER () \
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- TLS_TCB_OFFSET - 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 \
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CONST_THREAD_AREA (32, sizeof (struct pthread))
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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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/* Get and set the global scope generation counter in struct pthread. */
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# define THREAD_GSCOPE_IN_TCB 1
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# define THREAD_GSCOPE_FLAG_UNUSED 0
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# define THREAD_GSCOPE_FLAG_USED 1
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# define THREAD_GSCOPE_FLAG_WAIT 2
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# define THREAD_GSCOPE_RESET_FLAG() \
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do \
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{ int __res \
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= atomic_exchange_rel (&THREAD_SELF->header.gscope_flag, \
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THREAD_GSCOPE_FLAG_UNUSED); \
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if (__res == THREAD_GSCOPE_FLAG_WAIT) \
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lll_futex_wake (&THREAD_SELF->header.gscope_flag, 1, LLL_PRIVATE); \
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} \
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while (0)
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# define THREAD_GSCOPE_SET_FLAG() \
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do \
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{ \
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THREAD_SELF->header.gscope_flag = THREAD_GSCOPE_FLAG_USED; \
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atomic_write_barrier (); \
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} \
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while (0)
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# define THREAD_GSCOPE_WAIT() \
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GL(dl_wait_lookup_done) ()
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#endif /* __ASSEMBLER__ */
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#endif /* tls.h */
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