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authorRichard Henderson <rth@redhat.com>2004-01-16 05:23:05 +0000
committerRichard Henderson <rth@redhat.com>2004-01-16 05:23:05 +0000
commitba6838329c3e249ec3d5b6fea5d79eb281526662 (patch)
tree99755aaf7196002e678441bde0b95f7019d9d609 /nptl/sysdeps/alpha
parent33f0a6c75ee574bd376da63c6e88de98989d3373 (diff)
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* sysdeps/alpha/tls.h (tcbhead_t): Add private. (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.
2004-01-15 Richard Henderson <rth@redhat.com> * sysdeps/alpha/tls.h (tcbhead_t): Add private. (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.
Diffstat (limited to 'nptl/sysdeps/alpha')
-rw-r--r--nptl/sysdeps/alpha/tls.h80
1 files changed, 27 insertions, 53 deletions
diff --git a/nptl/sysdeps/alpha/tls.h b/nptl/sysdeps/alpha/tls.h
index f947fcf648..bc6630953f 100644
--- a/nptl/sysdeps/alpha/tls.h
+++ b/nptl/sysdeps/alpha/tls.h
@@ -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)))
-
-/* 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
+# define TLS_PRE_TCB_SIZE sizeof (struct pthread)
+
+/* 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)
-
-/* 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
+ REGISTER (64, 64, 32 * 8, -sizeof (struct pthread))
+
+/* 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__ */