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* sysdeps/alpha/tls.h (tcbhead_t): Add private.

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(TLS_INIT_TCB_SIZE, TLS_INIT_TCB_ALIGN, TLS_TCB_SIZE,
        TLS_PRE_TCB_SIZE, TLS_TCB_ALIGN, INSTALL_DTV, INSTALL_NEW_DTV,
        GET_DTV, THREAD_DTV, THREAD_SELF, DB_THREAD_SELF): Match ia64.
        (TLS_TCB_OFFSET, THREAD_ID, NO_TLS_OFFSET): Remove.
        (THREAD_GETMEM, THREAD_GETMEM_NC): Simplify.
        (THREAD_SETMEM, THREAD_SETMEM_NC): Likewise.
        * sysdeps/unix/sysv/linux/alpha/createthread.c (TLS_VALUE): Match ia64.
This commit is contained in:
Richard Henderson 2004-01-16 05:23:05 +00:00
parent 4dbd216dc3
commit bbbfa1b98e
2 changed files with 26 additions and 53 deletions
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76
sysdeps/alpha/nptl/tls.h
View File

@ -57,93 +57,67 @@ 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. */
typedef struct
{
dtv_t *dtv;
void *private;
} tcbhead_t;
/* This is the size of the initial TCB. */
# define TLS_INIT_TCB_SIZE 0
# define TLS_INIT_TCB_SIZE sizeof (tcbhead_t)
/* Alignment requirements for the initial TCB. */
# define TLS_INIT_TCB_ALIGN __alignof__ (struct pthread)
# define TLS_INIT_TCB_ALIGN 16
/* This is the size of the TCB. */
# define TLS_TCB_SIZE 0
/* Alignment requirements for the TCB. */
# define TLS_TCB_ALIGN __alignof__ (struct pthread)
# define TLS_TCB_SIZE sizeof (tcbhead_t)
/* This is the size we need before TCB. */
# define TLS_PRE_TCB_SIZE \
(sizeof (struct pthread) \
+ ((sizeof (tcbhead_t) + TLS_TCB_ALIGN - 1) & ~(TLS_TCB_ALIGN - 1)))
# define TLS_PRE_TCB_SIZE sizeof (struct pthread)
/* The following assumes that TP (R2 or R13) 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 struct is allocated immediately ahead of the
TCB. This implies that the pthread_descr address is
TP - (TLS_PRE_TCB_SIZE + 0x7000). */
/* ??? PPC uses offset 0x7000; seems like a good idea for alpha too,
but binutils not yet changed to match. */
# define TLS_TCB_OFFSET 0
/* Alignment requirements for the TCB. */
# define TLS_TCB_ALIGN 16
/* 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
(((tcbhead_t *) (tcbp))->dtv = (dtvp) + 1)
/* Install new dtv for current thread. */
# define INSTALL_NEW_DTV(dtv) (THREAD_DTV() = (dtv))
# define INSTALL_NEW_DTV(dtv) \
(THREAD_DTV() = (dtv))
/* Return dtv of given thread descriptor. */
# define GET_DTV(tcbp) (((tcbhead_t *) (tcbp))[-1].dtv)
# 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) \
(__builtin_set_thread_pointer ((void *) (tcbp) + TLS_TCB_OFFSET), NULL)
(__builtin_set_thread_pointer ((void *)(tcbp)), NULL)
/* Return the address of the dtv for the current thread. */
# define THREAD_DTV() \
(((tcbhead_t *) (__builtin_thread_pointer () - TLS_TCB_OFFSET))[-1].dtv)
(((tcbhead_t *) __builtin_thread_pointer ())->dtv)
/* Return the thread descriptor for the current thread. */
# define THREAD_SELF \
((struct pthread *) (__builtin_thread_pointer () \
- TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE))
((struct pthread *)__builtin_thread_pointer () - 1)
/* Magic for libthread_db to know how to do THREAD_SELF. */
# define DB_THREAD_SELF \
REGISTER (64, 64, 32 * 8, - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE)
REGISTER (64, 64, 32 * 8, -sizeof (struct pthread))
/* Identifier for the current thread. THREAD_SELF is usable but
sometimes more expensive than necessary as in this case. */
# define THREAD_ID (__builtin_thread_pointer ())
/* Read member of the thread descriptor directly. */
# define THREAD_GETMEM(descr, member) ((void)(descr), (THREAD_SELF)->member)
/* Same as THREAD_GETMEM, but the member offset can be non-constant. */
# define THREAD_GETMEM_NC(descr, member, idx) \
((void)(descr), (THREAD_SELF)->member[idx])
/* Set member of the thread descriptor directly. */
# define THREAD_SETMEM(descr, member, value) \
((void)(descr), (THREAD_SELF)->member = (value))
/* Same as THREAD_SETMEM, but the member offset can be non-constant. */
# define THREAD_SETMEM_NC(descr, member, idx, value) \
((void)(descr), (THREAD_SELF)->member[idx] = (value))
/* 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
/* Access to data in the thread descriptor is easy. */
#define THREAD_GETMEM(descr, member) \
descr->member
#define THREAD_GETMEM_NC(descr, member, idx) \
descr->member[idx]
#define THREAD_SETMEM(descr, member, value) \
descr->member = (value)
#define THREAD_SETMEM_NC(descr, member, idx, value) \
descr->member[idx] = (value)
#endif /* __ASSEMBLER__ */

3
sysdeps/unix/sysv/linux/alpha/nptl/createthread.c
View File

@ -17,8 +17,7 @@
02111-1307 USA. */
/* Value passed to 'clone' for initialization of the thread register. */
#define TLS_VALUE ((void *) (pd) \
+ TLS_TCB_OFFSET + TLS_PRE_TCB_SIZE)
#define TLS_VALUE (pd + 1)
/* Get the real implementation. */
#include <nptl/sysdeps/pthread/createthread.c>