lib/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2025-07-30 22:43:12 +03:00
Code Activity

ARC: Thread Local Storage support

Browse Source 
This includes all 4 TLS addressing models

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
Vineet Gupta
2018-10-23 14:18:04 -07:00
parent dd2e6ef179
commit 0261315289
5 changed files with 240 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
sysdeps/arc/dl-tls.h Normal file
View File

@ -0,0 +1,30 @@
/* Thread-local storage handling in the ELF dynamic linker. ARC version.
Copyright (C) 2020 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
<https://www.gnu.org/licenses/>. */
/* Type used for the representation of TLS information in the GOT. */
typedef struct
{
unsigned long int ti_module;
unsigned long int ti_offset;
} tls_index;
extern void *__tls_get_addr (tls_index *ti);
/* Value used for dtv entries for which the allocation is delayed. */
#define TLS_DTV_UNALLOCATED ((void *) -1l)

27
sysdeps/arc/libc-tls.c Normal file
View File

@ -0,0 +1,27 @@
/* Thread-local storage handling in the ELF dynamic linker. ARC version.
Copyright (C) 2020 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
<https://www.gnu.org/licenses/>. */
#include <csu/libc-tls.c>
#include <dl-tls.h>
void *
__tls_get_addr (tls_index *ti)
{
dtv_t *dtv = THREAD_DTV ();
return (char *) dtv[1].pointer.val + ti->ti_offset;
}

11
sysdeps/arc/nptl/tcb-offsets.sym Normal file
View File

@ -0,0 +1,11 @@
#include <sysdep.h>
#include <tls.h>
-- Derive offsets relative to the thread register.
#define thread_offsetof(mem) (long)(offsetof (struct pthread, mem) - sizeof (struct pthread))
MULTIPLE_THREADS_OFFSET offsetof (struct pthread, header.multiple_threads)
TLS_PRE_TCB_SIZE sizeof (struct pthread)
TLS_TCB_SIZE sizeof (tcbhead_t)
PTHREAD_TID offsetof (struct pthread, tid)

139
sysdeps/arc/nptl/tls.h Normal file
View File

@ -0,0 +1,139 @@
/* Definition for thread-local data handling. NPTL/ARC version.
Copyright (C) 2020 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
<https://www.gnu.org/licenses/>. */
#ifndef _ARC_NPTL_TLS_H
#define _ARC_NPTL_TLS_H 1
#include <dl-sysdep.h>
#ifndef __ASSEMBLER__
# include <stdbool.h>
# include <stddef.h>
# include <stdint.h>
#include <dl-dtv.h>
/* Get system call information. */
# include <sysdep.h>
/* The TLS blocks start right after the TCB. */
# define TLS_DTV_AT_TP 1
# define TLS_TCB_AT_TP 0
/* Get the thread descriptor definition. */
# include <nptl/descr.h>
typedef struct
{
dtv_t *dtv;
uintptr_t pointer_guard;
} tcbhead_t;
/* 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__ (struct pthread)
/* This is the size of the TCB. */
#ifndef TLS_TCB_SIZE
# define TLS_TCB_SIZE sizeof (tcbhead_t)
#endif
/* Alignment requirements for the TCB. */
# define TLS_TCB_ALIGN __alignof__ (struct pthread)
/* This is the size we need before TCB. */
# define TLS_PRE_TCB_SIZE sizeof (struct pthread)
/* Install the dtv pointer. The pointer passed is to the element with
index -1 which contain the length. */
# define INSTALL_DTV(tcbp, dtvp) \
(((tcbhead_t *) (tcbp))->dtv = (dtvp) + 1)
/* Install new dtv for current thread. */
# define INSTALL_NEW_DTV(dtv) \
(THREAD_DTV() = (dtv))
/* Return dtv of given thread descriptor. */
# define GET_DTV(tcbp) \
(((tcbhead_t *) (tcbp))->dtv)
/* Code to initially initialize the thread pointer. */
# define TLS_INIT_TP(tcbp) \
({ \
long result_var; \
__builtin_set_thread_pointer (tcbp); \
result_var = INTERNAL_SYSCALL_CALL (arc_settls, (tcbp));\
INTERNAL_SYSCALL_ERROR_P (result_var) \
? "settls syscall error" : NULL; \
})
/* Value passed to 'clone' for initialization of the thread register. */
# define TLS_DEFINE_INIT_TP(tp, pd) void *tp = (pd) + 1
/* Return the address of the dtv for the current thread. */
# define THREAD_DTV() \
(((tcbhead_t *) __builtin_thread_pointer ())->dtv)
/* Return the thread descriptor for the current thread. */
# define THREAD_SELF \
((struct pthread *)__builtin_thread_pointer () - 1)
/* Magic for libthread_db to know how to do THREAD_SELF. */
# define DB_THREAD_SELF \
CONST_THREAD_AREA (32, sizeof (struct pthread))
/* Access to data in the thread descriptor is easy. */
# define THREAD_GETMEM(descr, member) \
descr->member
# define THREAD_GETMEM_NC(descr, member, idx) \
descr->member[idx]
# define THREAD_SETMEM(descr, member, value) \
descr->member = (value)
# define THREAD_SETMEM_NC(descr, member, idx, value) \
descr->member[idx] = (value)
/* Get and set the global scope generation counter in struct pthread. */
#define THREAD_GSCOPE_IN_TCB 1
#define THREAD_GSCOPE_FLAG_UNUSED 0
#define THREAD_GSCOPE_FLAG_USED 1
#define THREAD_GSCOPE_FLAG_WAIT 2
#define THREAD_GSCOPE_RESET_FLAG() \
do \
{ int __res \
= atomic_exchange_rel (&THREAD_SELF->header.gscope_flag, \
THREAD_GSCOPE_FLAG_UNUSED); \
if (__res == THREAD_GSCOPE_FLAG_WAIT) \
lll_futex_wake (&THREAD_SELF->header.gscope_flag, 1, LLL_PRIVATE); \
} \
while (0)
#define THREAD_GSCOPE_SET_FLAG() \
do \
{ \
THREAD_SELF->header.gscope_flag = THREAD_GSCOPE_FLAG_USED; \
atomic_write_barrier (); \
} \
while (0)
#define THREAD_GSCOPE_WAIT() \
GL(dl_wait_lookup_done) ()
#endif /* !__ASSEMBLER__ */
#endif /* tls.h */

33
sysdeps/arc/stackinfo.h Normal file
View File

@ -0,0 +1,33 @@
/* Stack environment definitions for ARC.
Copyright (C) 2020 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
<https://www.gnu.org/licenses/>. */
/* This file contains a bit of information about the stack allocation
of the processor. */
#ifndef _STACKINFO_H
#define _STACKINFO_H 1
#include <elf.h>
/* On ARC the stack grows down. */
#define _STACK_GROWS_DOWN 1
/* Default to a non-executable stack. */
#define DEFAULT_STACK_PERMS (PF_R|PF_W)
#endif /* stackinfo.h */