diff options
Diffstat (limited to 'linuxthreads/sysdeps/ia64/tls.h')
| -rw-r--r-- | linuxthreads/sysdeps/ia64/tls.h | 86 |
1 files changed, 71 insertions, 15 deletions
diff --git a/linuxthreads/sysdeps/ia64/tls.h b/linuxthreads/sysdeps/ia64/tls.h index 544da6e694..b2c47c00a6 100644 --- a/linuxthreads/sysdeps/ia64/tls.h +++ b/linuxthreads/sysdeps/ia64/tls.h @@ -1,5 +1,5 @@ /* Definitions for thread-local data handling. linuxthreads/IA-64 version. - Copyright (C) 2002 Free Software Foundation, Inc. + Copyright (C) 2002, 2003 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 @@ -33,35 +33,91 @@ typedef union dtv } dtv_t; -/* FIXME: Only temporary. When TLS is supported on IA-64, - pthread_descr struct needs to be immediately below r13 and - at r13 a struct { dtv_t *dtv; void *private; }. */ typedef struct { - void *tcb; /* Pointer to the TCB. Not necessary the - thread descriptor used by libpthread. */ dtv_t *dtv; - void *self; /* Pointer to the thread descriptor. */ - int multiple_threads; + void *private; } tcbhead_t; #else /* __ASSEMBLER__ */ # include <tcb-offsets.h> #endif /* __ASSEMBLER__ */ -#undef USE_TLS +#ifdef HAVE_TLS_SUPPORT -#if USE_TLS +/* Signal that TLS support is available. */ +# define USE_TLS 1 + +# ifndef __ASSEMBLER__ +/* 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 DTV is allocated at the TP; the TCB is placed elsewhere. */ +# 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 *)__thread_self)->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) \ + (__thread_self = (tcbp), NULL) + +/* Return the address of the dtv for the current thread. */ +# define THREAD_DTV() \ + (((tcbhead_t *)__thread_self)->dtv) + +/* Return the thread descriptor for the current thread. */ +# undef THREAD_SELF +# define THREAD_SELF (__thread_self - 1) + +# undef INIT_THREAD_SELF +# define INIT_THREAD_SELF(descr, nr) \ + (__thread_self = (struct _pthread_descr_struct *)(descr) + 1) + +/* Get the thread descriptor definition. */ +# include <linuxthreads/descr.h> + +# endif #else -#define NONTLS_INIT_TP \ - do { \ - static const tcbhead_t nontls_init_tp \ - = { .multiple_threads = 0 }; \ - __thread_self = (__typeof (__thread_self)) &nontls_init_tp; \ +# ifndef __ASSEMBLER__ +/* Get the thread descriptor definition. */ +# include <linuxthreads/descr.h> + +# define NONTLS_INIT_TP \ + do { \ + static struct _pthread_descr_struct nontls_init_tp \ + = { .p_header.data.multiple_threads = 0 }; \ + __thread_self = ((__typeof (__thread_self)) &nontls_init_tp) + 1; \ } while (0) +#endif + #endif /* USE_TLS */ #endif /* tls.h */ |