mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-26 04:31:03 +00:00
or1k: Thread Local Storage support
OpenRISC includes 3 TLS addressing models. Local Dynamic optimizations are not done in the linker and therefore use the same code sequences as Global Dynamic. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
This commit is contained in:
Stafford Horne
parent
de5c0edc80
commit
96882a00ce
27
sysdeps/or1k/dl-tls.h
Normal file
27
sysdeps/or1k/dl-tls.h
Normal file
@ -0,0 +1,27 @@
|
||||
/* TLS definitions for the ELF dynamic linker. OpenRISC version.
|
||||
Copyright (C) 2022 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);
|
||||
34
sysdeps/or1k/libc-tls.c
Normal file
34
sysdeps/or1k/libc-tls.c
Normal file
@ -0,0 +1,34 @@
|
||||
/* Thread-local storage handling in the ELF dynamic linker.
|
||||
OpenRISC version.
|
||||
Copyright (C) 2022 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>
|
||||
|
||||
/* On OpenRISC, linker optimizations are not required, so __tls_get_addr
|
||||
can be called even in statically linked binaries. In this case module
|
||||
must be always 1 and PT_TLS segment exist in the binary, otherwise it
|
||||
would not link. */
|
||||
|
||||
void *
|
||||
__tls_get_addr (tls_index *ti)
|
||||
{
|
||||
dtv_t *dtv = THREAD_DTV ();
|
||||
return (char *) dtv[1].pointer.val + ti->ti_offset;
|
||||
}
|
||||
184
sysdeps/or1k/nptl/tls.h
Normal file
184
sysdeps/or1k/nptl/tls.h
Normal file
@ -0,0 +1,184 @@
|
||||
/* Definition for thread-local data handling. NPTL/OpenRISC version.
|
||||
Copyright (C) 2022 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>
|
||||
|
||||
typedef struct
|
||||
{
|
||||
dtv_t *dtv;
|
||||
void *__padding[3];
|
||||
} tcbhead_t;
|
||||
|
||||
register tcbhead_t *__thread_self __asm__("r10");
|
||||
|
||||
# define TLS_MULTIPLE_THREADS_IN_TCB 1
|
||||
|
||||
/* Get system call information. */
|
||||
# include <sysdep.h>
|
||||
|
||||
/* The TP points to the start of the TLS block.
|
||||
As I understand it, this isn't strictly that "TP points to DTV" - it's
|
||||
more where to place the TCB in the TLS block. This will place it in
|
||||
the beginning.
|
||||
|
||||
Layout:
|
||||
+-----+-----+----------------------+
|
||||
| PRE | TCB | TLS MEMORY .. |
|
||||
+-----+-----+----------------------+
|
||||
^ r10 / TP
|
||||
|
||||
PRE is the struct pthread described below
|
||||
TCB is tcbhead_t
|
||||
TLS memory is where the TLS program sections are loaded
|
||||
|
||||
See _dl_allocate_tls_storage and __libc_setup_tls for more information. */
|
||||
|
||||
# define TLS_DTV_AT_TP 1
|
||||
# define TLS_TCB_AT_TP 0
|
||||
|
||||
/* Get the thread descriptor definition. */
|
||||
# include <nptl/descr.h>
|
||||
|
||||
/* Requirements for the TCB. */
|
||||
# define TLS_INIT_TCB_SIZE sizeof (tcbhead_t)
|
||||
# define TLS_INIT_TCB_ALIGN __alignof__ (struct pthread)
|
||||
|
||||
# define TLS_TCB_SIZE sizeof (tcbhead_t)
|
||||
# define TLS_TCB_ALIGN __alignof__ (struct pthread)
|
||||
|
||||
/* This is the size of the TCB. */
|
||||
|
||||
/* This is the size we need before TCB.
|
||||
To support THREAD_GETMEM with friends we want to have a
|
||||
struct pthread available.
|
||||
Yank it in infront of everything, I'm sure nobody will mind.
|
||||
|
||||
This memory is really allocated PRE the TLS block, so it's possible
|
||||
to do ((char*)tlsblock) - TLS_PRE_TCB_SIZE to access it.
|
||||
This is done for THREAD_SELF. */
|
||||
|
||||
# define TLS_PRE_TCB_SIZE sizeof (struct pthread)
|
||||
|
||||
/* Install the dtv pointer.
|
||||
When called, dtvp is a pointer not the DTV per say (which should start
|
||||
with the generation counter) but to the length of the DTV.
|
||||
We can always index with -1, so we store dtvp[1]. */
|
||||
|
||||
# define INSTALL_DTV(tcbp, dtvp) \
|
||||
(((tcbhead_t *) (tcbp))->dtv = (dtvp) + 1)
|
||||
|
||||
/* Install new dtv for current thread
|
||||
In a logicial world dtv here would also point to the length of the DTV.
|
||||
However it does not, this time it points to the generation counter,
|
||||
so just store it.
|
||||
|
||||
Note: -1 is still valid and contains the length. */
|
||||
|
||||
# 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.
|
||||
|
||||
Set TP to the address _after_ tcbhead_t. This will allow us
|
||||
to change the size of tcbhead_t without having to re-link everything.
|
||||
|
||||
This has to return NULL on success (or a string with the failure text).
|
||||
It's hard to fail this, so return NULL always. */
|
||||
|
||||
# define TLS_INIT_TP(tcbp) \
|
||||
({__thread_self = ((tcbhead_t *)tcbp + 1); NULL;})
|
||||
|
||||
/* Value passed to 'clone' for initialization of the thread register. */
|
||||
# define TLS_DEFINE_INIT_TP(tp, pd) \
|
||||
void *tp = ((char *) pd + TLS_PRE_TCB_SIZE + TLS_INIT_TCB_SIZE)
|
||||
|
||||
/* Return the address of the dtv for the current thread.
|
||||
|
||||
Dereference TP, offset to dtv - really straightforward.
|
||||
Remember that we made TP point to after tcb, so we need to reverse that. */
|
||||
|
||||
# define THREAD_DTV() \
|
||||
((((tcbhead_t *)__thread_self)-1)->dtv)
|
||||
|
||||
/* Return the thread descriptor for the current thread.
|
||||
|
||||
Return a pointer to the TLS_PRE area where we allocated space for
|
||||
a struct pthread. Again, TP points to after tcbhead_t, compensate with
|
||||
TLS_INIT_TCB_SIZE.
|
||||
|
||||
I regard this is a seperate system from the "normal" TLS. */
|
||||
|
||||
# define THREAD_SELF \
|
||||
((struct pthread *) ((char *) __thread_self - TLS_INIT_TCB_SIZE \
|
||||
- TLS_PRE_TCB_SIZE))
|
||||
|
||||
/* Magic for libthread_db to know how to do THREAD_SELF. */
|
||||
|
||||
# define DB_THREAD_SELF \
|
||||
REGISTER (32, 32, 10 * 4, - TLS_INIT_TCB_SIZE - TLS_PRE_TCB_SIZE)
|
||||
|
||||
# include <tcb-access.h>
|
||||
|
||||
/* 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_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 */
|
||||
34
sysdeps/or1k/stackinfo.h
Normal file
34
sysdeps/or1k/stackinfo.h
Normal file
@ -0,0 +1,34 @@
|
||||
/* Stack definitions for OpenRISC.
|
||||
Copyright (C) 2022 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 or1k the stack grows down. */
|
||||
#define _STACK_GROWS_DOWN 1
|
||||
|
||||
/* Default to an executable stack. PF_X can be overridden if PT_GNU_STACK is
|
||||
present, but it is presumed absent. */
|
||||
#define DEFAULT_STACK_PERMS (PF_R | PF_W | PF_X)
|
||||
|
||||
#endif /* stackinfo.h */
|
||||
Loading…
Reference in New Issue
Block a user