mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-13 23:00:22 +00:00
2b778ceb40
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 6694 files FOO. I then removed trailing white space from benchtests/bench-pthread-locks.c and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this diagnostic from Savannah: remote: *** pre-commit check failed ... remote: *** error: lines with trailing whitespace found remote: error: hook declined to update refs/heads/master
185 lines
5.9 KiB
C
185 lines
5.9 KiB
C
/* Definition for thread-local data handling. NPTL/MIPS version.
|
|
Copyright (C) 2005-2021 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 _TLS_H
|
|
#define _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>
|
|
|
|
#ifdef __mips16
|
|
/* MIPS16 uses GCC builtin to access the TP. */
|
|
# define READ_THREAD_POINTER() (__builtin_thread_pointer ())
|
|
#else
|
|
/* Note: rd must be $v1 to be ABI-conformant. */
|
|
# if defined (__mips_isa_rev) && __mips_isa_rev >= 2
|
|
# define READ_THREAD_POINTER() \
|
|
({ void *__result; \
|
|
asm volatile ("rdhwr\t%0, $29" : "=v" (__result)); \
|
|
__result; })
|
|
# else
|
|
# define READ_THREAD_POINTER() \
|
|
({ void *__result; \
|
|
asm volatile (".set\tpush\n\t.set\tmips32r2\n\t" \
|
|
"rdhwr\t%0, $29\n\t.set\tpop" : "=v" (__result)); \
|
|
__result; })
|
|
# endif
|
|
#endif
|
|
|
|
#else /* __ASSEMBLER__ */
|
|
# include <tcb-offsets.h>
|
|
|
|
# if __mips_isa_rev >= 2
|
|
# define READ_THREAD_POINTER(rd) rdhwr rd, $29
|
|
# else
|
|
# define READ_THREAD_POINTER(rd) \
|
|
.set push; \
|
|
.set mips32r2; \
|
|
rdhwr rd, $29; \
|
|
.set pop
|
|
# endif
|
|
#endif /* __ASSEMBLER__ */
|
|
|
|
|
|
#ifndef __ASSEMBLER__
|
|
|
|
/* The TP points to the start of the thread blocks. */
|
|
# 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;
|
|
void *private;
|
|
} tcbhead_t;
|
|
|
|
/* This is the size of the initial TCB. Because our TCB is before the thread
|
|
pointer, we don't need this. */
|
|
# define TLS_INIT_TCB_SIZE 0
|
|
|
|
/* Alignment requirements for the initial TCB. */
|
|
# define TLS_INIT_TCB_ALIGN __alignof__ (struct pthread)
|
|
|
|
/* This is the size of the TCB. Because our TCB is before the thread
|
|
pointer, we don't need this. */
|
|
# define TLS_TCB_SIZE 0
|
|
|
|
/* Alignment requirements for the TCB. */
|
|
# define TLS_TCB_ALIGN __alignof__ (struct pthread)
|
|
|
|
/* This is the size we need before TCB - actually, it includes the TCB. */
|
|
# define TLS_PRE_TCB_SIZE \
|
|
(sizeof (struct pthread) \
|
|
+ ((sizeof (tcbhead_t) + TLS_TCB_ALIGN - 1) & ~(TLS_TCB_ALIGN - 1)))
|
|
|
|
/* The thread pointer (in hardware register $29) points to the end of
|
|
the TCB + 0x7000, as for PowerPC. The pthread_descr structure is
|
|
immediately in front of the TCB. */
|
|
# define TLS_TCB_OFFSET 0x7000
|
|
|
|
/* 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))[-1].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))[-1].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(tcbp) \
|
|
({ long int result_var; \
|
|
result_var = INTERNAL_SYSCALL_CALL (set_thread_area, \
|
|
(char *) (tcbp) + TLS_TCB_OFFSET); \
|
|
INTERNAL_SYSCALL_ERROR_P (result_var) \
|
|
? "unknown error" : NULL; })
|
|
|
|
/* Value passed to 'clone' for initialization of the thread register. */
|
|
# define TLS_DEFINE_INIT_TP(tp, pd) \
|
|
void *tp = (void *) (pd) + TLS_TCB_OFFSET + TLS_PRE_TCB_SIZE
|
|
|
|
/* Return the address of the dtv for the current thread. */
|
|
# define THREAD_DTV() \
|
|
(((tcbhead_t *) (READ_THREAD_POINTER () - TLS_TCB_OFFSET))[-1].dtv)
|
|
|
|
/* Return the thread descriptor for the current thread. */
|
|
# define THREAD_SELF \
|
|
((struct pthread *) (READ_THREAD_POINTER () \
|
|
- TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE))
|
|
|
|
/* Magic for libthread_db to know how to do THREAD_SELF. */
|
|
# define DB_THREAD_SELF \
|
|
CONST_THREAD_AREA (32, TLS_TCB_OFFSET + TLS_PRE_TCB_SIZE)
|
|
|
|
/* 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)
|
|
|
|
/* l_tls_offset == 0 is perfectly valid on MIPS, so we have to use some
|
|
different value to mean unset l_tls_offset. */
|
|
# define NO_TLS_OFFSET -1
|
|
|
|
/* 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)
|
|
|
|
#endif /* __ASSEMBLER__ */
|
|
|
|
#endif /* tls.h */
|