diff options
Diffstat (limited to 'linuxthreads/sysdeps/powerpc/tls.h')
| -rw-r--r-- | linuxthreads/sysdeps/powerpc/tls.h | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/linuxthreads/sysdeps/powerpc/tls.h b/linuxthreads/sysdeps/powerpc/tls.h deleted file mode 100644 index 1ae0b60ff1..0000000000 --- a/linuxthreads/sysdeps/powerpc/tls.h +++ /dev/null @@ -1,165 +0,0 @@ -/* Definitions for thread-local data handling. linuxthreads/PPC version. - Copyright (C) 2003, 2005 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, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#ifndef _TLS_H -#define _TLS_H - -#ifndef __ASSEMBLER__ - -# include <pt-machine.h> -# include <stdbool.h> -# include <stddef.h> - -/* Type for the dtv. */ -typedef union dtv -{ - size_t counter; - struct - { - void *val; - bool is_static; - } pointer; -} dtv_t; - -#else /* __ASSEMBLER__ */ -# include <tcb-offsets.h> -#endif /* __ASSEMBLER__ */ - -#ifdef HAVE_TLS_SUPPORT - -/* Signal that TLS support is available. */ -# define USE_TLS 1 - -# ifndef __ASSEMBLER__ - -/* This layout is actually wholly private and not affected by the ABI. - Nor does it overlap the pthread data structure, so we need nothing - extra here at all. */ -typedef struct -{ - dtv_t *dtv; -} tcbhead_t; - -/* This is the size of the initial TCB. */ -# define TLS_INIT_TCB_SIZE 0 - -/* Alignment requirements for the initial TCB. */ -# define TLS_INIT_TCB_ALIGN __alignof__ (struct _pthread_descr_struct) - -/* This is the size of the TCB. */ -# define TLS_TCB_SIZE 0 - -/* Alignment requirements for the TCB. */ -# define TLS_TCB_ALIGN __alignof__ (struct _pthread_descr_struct) - -/* This is the size we need before TCB. */ -# define TLS_PRE_TCB_SIZE \ - (sizeof (struct _pthread_descr_struct) \ - + ((sizeof (tcbhead_t) + TLS_TCB_ALIGN - 1) & ~(TLS_TCB_ALIGN - 1))) - -/* The following assumes that TP (R2 or R13) is points to the end of the - TCB + 0x7000 (per the ABI). This implies that TCB address is - TP - 0x7000. As we define TLS_DTV_AT_TP we can - assume that the pthread_descr is allocated immediately ahead of the - TCB. This implies that the pthread_descr address is - TP - (TLS_PRE_TCB_SIZE + 0x7000). */ -#define TLS_TCB_OFFSET 0x7000 - -/* The DTV is allocated at the TP; the TCB is placed elsewhere. */ -/* This is not really true for powerpc64. We are following alpha - where the DTV pointer is first doubleword in the TCB. */ -# define TLS_DTV_AT_TP 1 - -/* 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) - -/* We still need this define so that tcb-offsets.sym can override it and - use THREAD_SELF to generate MULTIPLE_THREADS_OFFSET. */ -# define __thread_register ((void *) __thread_self) - -/* 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. - - The global register variable is declared in pt-machine.h with the - wrong type, so we need some extra casts to get the desired result. - This avoids a lvalue cast that gcc-3.4 does not like. */ -# define TLS_INIT_TP(TCBP, SECONDCALL) \ - (__thread_self = (struct _pthread_descr_struct *) \ - ((void *) (TCBP) + TLS_TCB_OFFSET), NULL) - -/* Return the address of the dtv for the current thread. */ -# define THREAD_DTV() \ - (((tcbhead_t *) ((void *) __thread_self - TLS_TCB_OFFSET))[-1].dtv) - -/* Return the thread descriptor for the current thread. */ -# undef THREAD_SELF -# define THREAD_SELF \ - ((pthread_descr) (__thread_register \ - - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE)) - -# undef INIT_THREAD_SELF -# define INIT_THREAD_SELF(DESCR, NR) \ - (__thread_self = (struct _pthread_descr_struct *)((void *) (DESCR) \ - + TLS_TCB_OFFSET + TLS_PRE_TCB_SIZE)) - -/* Make sure we have the p_multiple_threads member in the thread structure. - See below. */ -# define TLS_MULTIPLE_THREADS_IN_TCB 1 - -/* Get the thread descriptor definition. */ -# include <linuxthreads/descr.h> - -/* l_tls_offset == 0 is perfectly valid on PPC, so we have to use some - different value to mean unset l_tls_offset. */ -# define NO_TLS_OFFSET -1 - -# endif /* __ASSEMBLER__ */ - -#elif !defined __ASSEMBLER__ - -/* This overlaps the start of the pthread_descr. System calls - and such use this to find the multiple_threads flag and need - to use the same offset relative to the thread register in both - single-threaded and multi-threaded code. */ -typedef struct -{ - void *tcb; /* Never used. */ - dtv_t *dtv; /* Never used. */ - void *self; /* Used only if multithreaded, and rarely. */ - int multiple_threads; /* Only this member is really used. */ -} tcbhead_t; - -#define NONTLS_INIT_TP \ - do { \ - static const tcbhead_t nontls_init_tp = { .multiple_threads = 0 }; \ - __thread_self = (__typeof (__thread_self)) &nontls_init_tp; \ - } while (0) - -#endif /* HAVE_TLS_SUPPORT */ - -#endif /* tls.h */ |