diff options
Diffstat (limited to 'nptl/sysdeps/powerpc/tls.h')
| -rw-r--r-- | nptl/sysdeps/powerpc/tls.h | 67 |
1 files changed, 59 insertions, 8 deletions
diff --git a/nptl/sysdeps/powerpc/tls.h b/nptl/sysdeps/powerpc/tls.h index ce7f5bd53d..ad5698c6f8 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 Free Software Foundation, Inc. + Copyright (C) 2003, 2005, 2007 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 @@ -23,6 +23,7 @@ # include <dl-sysdep.h> #ifndef __ASSEMBLER__ +# include <stdbool.h> # include <stddef.h> # include <stdint.h> @@ -30,7 +31,11 @@ typedef union dtv { size_t counter; - void *pointer; + struct + { + void *val; + bool is_static; + } pointer; } dtv_t; #else /* __ASSEMBLER__ */ @@ -60,11 +65,13 @@ typedef union dtv /* Get the thread descriptor definition. */ # include <nptl/descr.h> -/* 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. */ +/* 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. */ typedef struct { + uintptr_t pointer_guard; + uintptr_t stack_guard; dtv_t *dtv; } tcbhead_t; @@ -122,7 +129,7 @@ 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 \ @@ -131,9 +138,9 @@ 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. */ @@ -151,10 +158,54 @@ 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 */ |