From cccc549ced940c85039c8ce263c8bb571f244afd Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Tue, 31 Jan 2006 05:05:15 +0000 Subject: initial import of latest linuxthreads --- libpthread/linuxthreads/sysdeps/sh/tls.h | 159 +++++++++++++++++++++++++++++++ 1 file changed, 159 insertions(+) create mode 100644 libpthread/linuxthreads/sysdeps/sh/tls.h (limited to 'libpthread/linuxthreads/sysdeps/sh/tls.h') diff --git a/libpthread/linuxthreads/sysdeps/sh/tls.h b/libpthread/linuxthreads/sysdeps/sh/tls.h new file mode 100644 index 000000000..027be4bf4 --- /dev/null +++ b/libpthread/linuxthreads/sysdeps/sh/tls.h @@ -0,0 +1,159 @@ +/* Definition for thread-local data handling. linuxthreads/SH version. + Copyright (C) 2002, 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 + +# include + +#ifndef __ASSEMBLER__ +# include +# include +# include + +/* Type for the dtv. */ +typedef union dtv +{ + size_t counter; + struct + { + void *val; + bool is_static; + } pointer; +} dtv_t; + +#else /* __ASSEMBLER__ */ +# include +#endif /* __ASSEMBLER__ */ + + +/* We can support TLS only if the floating-stack support is available. */ +#if defined HAVE_TLS_SUPPORT \ + && (defined FLOATING_STACKS || !defined IS_IN_libpthread) + +/* Signal that TLS support is available. */ +# define USE_TLS 1 + +/* Include padding in _pthread_descr_struct so that libc can find p_errno, + if libpthread will only include the padding because of the !IS_IN_libpthread + check. */ +#ifndef FLOATING_STACKS +# define INCLUDE_TLS_PADDING 1 +#endif + +# ifndef __ASSEMBLER__ + +typedef struct +{ + dtv_t *dtv; + void *private; +} 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__ (tcbhead_t) + +/* This is the size of the TCB. */ +# define TLS_TCB_SIZE sizeof (tcbhead_t) + +/* This is the size we need before TCB. */ +# define TLS_PRE_TCB_SIZE sizeof (struct _pthread_descr_struct) + +/* Alignment requirements for the TCB. */ +# define TLS_TCB_ALIGN __alignof__ (struct _pthread_descr_struct) + +/* The TLS blocks start right after 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))->dtv = dtvp + 1 + +/* Install new dtv for current thread. */ +# define INSTALL_NEW_DTV(dtv) \ + ({ tcbhead_t *__tcbp; \ + __asm __volatile ("stc gbr,%0" : "=r" (__tcbp)); \ + __tcbp->dtv = (dtv);}) + +/* Return dtv of given thread descriptor. */ +# define GET_DTV(tcbp) \ + (((tcbhead_t *) (tcbp))->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, secondcall) \ + ({ __asm __volatile ("ldc %0,gbr" : : "r" (tcbp)); 0; }) + +/* Return the address of the dtv for the current thread. */ +# define THREAD_DTV() \ + ({ tcbhead_t *__tcbp; \ + __asm __volatile ("stc gbr,%0" : "=r" (__tcbp)); \ + __tcbp->dtv;}) + +/* Return the thread descriptor for the current thread. */ +# undef THREAD_SELF +# define THREAD_SELF \ + ({ struct _pthread_descr_struct *__self; \ + __asm ("stc gbr,%0" : "=r" (__self)); \ + __self - 1;}) + +# undef INIT_THREAD_SELF +# define INIT_THREAD_SELF(descr, nr) \ + ({ struct _pthread_descr_struct *__self = (void *) descr; \ + __asm __volatile ("ldc %0,gbr" : : "r" (__self + 1)); \ + 0; }) + +# define TLS_MULTIPLE_THREADS_IN_TCB 1 + +/* Get the thread descriptor definition. This must be after the + the definition of THREAD_SELF for TLS. */ +# include + +# endif /* __ASSEMBLER__ */ + +#else + +# ifndef __ASSEMBLER__ + +typedef struct +{ + void *tcb; + dtv_t *dtv; + void *self; + int multiple_threads; +} tcbhead_t; + +/* Get the thread descriptor definition. */ +# include + +# define NONTLS_INIT_TP \ + do { \ + static const tcbhead_t nontls_init_tp = { .multiple_threads = 0 }; \ + __asm __volatile ("ldc %0,gbr" : : "r" (&nontls_init_tp)); \ + } while (0) + +# endif /* __ASSEMBLER__ */ + +#endif /* HAVE_TLS_SUPPORT && (FLOATING_STACKS || !IS_IN_libpthread) */ + +#endif /* tls.h */ -- cgit v1.2.3