diff options
Diffstat (limited to 'nptl/sysdeps/powerpc/tls.h')
| -rw-r--r-- | nptl/sysdeps/powerpc/tls.h | 67 |
1 files changed, 8 insertions, 59 deletions
diff --git a/nptl/sysdeps/powerpc/tls.h b/nptl/sysdeps/powerpc/tls.h index ad5698c6f8..ce7f5bd53d 100644 --- a/nptl/sysdeps/powerpc/tls.h +++ b/nptl/sysdeps/powerpc/tls.h @@ -1,5 +1,5 @@ /* Definition for thread-local data handling. NPTL/PowerPC version. - Copyright (C) 2003, 2005, 2007 Free Software Foundation, Inc. + Copyright (C) 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 @@ -23,7 +23,6 @@ # include <dl-sysdep.h> #ifndef __ASSEMBLER__ -# include <stdbool.h> # include <stddef.h> # include <stdint.h> @@ -31,11 +30,7 @@ typedef union dtv { size_t counter; - struct - { - void *val; - bool is_static; - } pointer; + void *pointer; } dtv_t; #else /* __ASSEMBLER__ */ @@ -65,13 +60,11 @@ typedef union dtv /* Get the thread descriptor definition. */ # include <nptl/descr.h> -/* The stack_guard is accessed directly by GCC -fstack-protector code, - so it is a part of public ABI. The dtv and pointer_guard fields - are private. */ +/* 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 { - uintptr_t pointer_guard; - uintptr_t stack_guard; dtv_t *dtv; } tcbhead_t; @@ -129,7 +122,7 @@ register void *__thread_register __asm__ ("r13"); /* Return the address of the dtv for the current thread. */ # define THREAD_DTV() \ - (((tcbhead_t *) (__thread_register - TLS_TCB_OFFSET))[-1].dtv) + (((tcbhead_t *) (__thread_register - TLS_TCB_OFFSET))[-1].dtv) /* Return the thread descriptor for the current thread. */ # define THREAD_SELF \ @@ -138,9 +131,9 @@ register void *__thread_register __asm__ ("r13"); /* Magic for libthread_db to know how to do THREAD_SELF. */ # define DB_THREAD_SELF \ - REGISTER (32, 32, PT_THREAD_POINTER * 4, \ + REGISTER (32, 32, PT_THREAD_POINTER * 4, \ - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE) \ - REGISTER (64, 64, PT_THREAD_POINTER * 8, \ + REGISTER (64, 64, PT_THREAD_POINTER * 8, \ - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE) /* Read member of the thread descriptor directly. */ @@ -158,54 +151,10 @@ register void *__thread_register __asm__ ("r13"); # define THREAD_SETMEM_NC(descr, member, idx, value) \ ((void)(descr), (THREAD_SELF)->member[idx] = (value)) -/* Set the stack guard field in TCB head. */ -# define THREAD_SET_STACK_GUARD(value) \ - (((tcbhead_t *) ((char *) __thread_register \ - - TLS_TCB_OFFSET))[-1].stack_guard = (value)) -# define THREAD_COPY_STACK_GUARD(descr) \ - (((tcbhead_t *) ((char *) (descr) \ - + TLS_PRE_TCB_SIZE))[-1].stack_guard \ - = ((tcbhead_t *) ((char *) __thread_register \ - - TLS_TCB_OFFSET))[-1].stack_guard) - -/* Set the stack guard field in TCB head. */ -# define THREAD_GET_POINTER_GUARD() \ - (((tcbhead_t *) ((char *) __thread_register \ - - TLS_TCB_OFFSET))[-1].pointer_guard) -# define THREAD_SET_POINTER_GUARD(value) \ - (THREAD_GET_POINTER_GUARD () = (value)) -# define THREAD_COPY_POINTER_GUARD(descr) \ - (((tcbhead_t *) ((char *) (descr) \ - + TLS_PRE_TCB_SIZE))[-1].pointer_guard \ - = THREAD_GET_POINTER_GUARD()) - /* 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 -/* 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); \ - } \ - while (0) -#define THREAD_GSCOPE_SET_FLAG() \ - do \ - { \ - THREAD_SELF->header.gscope_flag = THREAD_GSCOPE_FLAG_USED; \ - atomic_write_barrier (); \ - } \ - while (0) -#define THREAD_GSCOPE_WAIT() \ - GL(dl_wait_lookup_done) () - #endif /* __ASSEMBLER__ */ #endif /* tls.h */ |