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authorUlrich Drepper <drepper@redhat.com>2003-01-17 19:57:05 +0000
committerUlrich Drepper <drepper@redhat.com>2003-01-17 19:57:05 +0000
commit0f0b799489b3b4df2c69c9a6844be6a8f294778d (patch)
treeeb3e992ccc2b6635acfb7828bd8a00f4a69049ac /linuxthreads
parentd1852dbb73b0ceb21cd132bb57ac2cee2364d786 (diff)
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Update.
2003-01-17 Richard Henderson <rth@redhat.com> * sysdeps/alpha/dl-machine.h (elf_machine_type_class): Add TLS relocs for class PLT. * sysdeps/alpha/libc-tls.c: New file. * sysdeps/unix/alpha/sysdep.S (EPILOGUE, GPSAVEREG): New. (LOADGP) [!PIC]: Rewrite to preserve caller's gp. 2003-01-17 Jakub Jelinek <jakub@redhat.com> * sysdeps/unix/sysv/linux/ia64/dl-static.c (_dl_static_init): Use __libc_lock_{,un}lock_recursive instead of __libc_lock_{,un}lock on _dl_static_lock.
Diffstat (limited to 'linuxthreads')
-rw-r--r--linuxthreads/ChangeLog12
-rw-r--r--linuxthreads/sysdeps/alpha/tls.h65
-rw-r--r--linuxthreads/sysdeps/unix/sysv/linux/alpha/vfork.S27
3 files changed, 69 insertions, 35 deletions
diff --git a/linuxthreads/ChangeLog b/linuxthreads/ChangeLog
index 93023e607a..7b1fd74282 100644
--- a/linuxthreads/ChangeLog
+++ b/linuxthreads/ChangeLog
@@ -1,3 +1,15 @@
+2003-01-17 Richard Henderson <rth@redhat.com>
+
+ * sysdeps/alpha/tls.h (tcbhead_t): Clarify second member.
+ (TLS_TCB_SIZE, TLS_TCB_ALIGN): Set for tcbhead_t.
+ (TLS_PRE_TCB_SIZE): New.
+ (TLS_INIT_TP, THREAD_SELF, INIT_THREAD_SELF): Update for
+ new ia64-style thread pointer layout.
+ (THREAD_GETMEM, THREAD_GETMEM_NC): New.
+ (THREAD_SETMEM, THREAD_SETMEM_NC): New.
+ * sysdeps/unix/sysv/linux/alpha/vfork.S: Don't tail-call to __fork
+ if !SHARED.
+
2003-01-15 Jakub Jelinek <jakub@redhat.com>
* sysdeps/ia64/tls.h (tcbhead_t): Use the TLS ABI required layout
diff --git a/linuxthreads/sysdeps/alpha/tls.h b/linuxthreads/sysdeps/alpha/tls.h
index 98d0d9f93e..d93c91fc52 100644
--- a/linuxthreads/sysdeps/alpha/tls.h
+++ b/linuxthreads/sysdeps/alpha/tls.h
@@ -1,5 +1,5 @@
/* Definitions for thread-local data handling. linuxthreads/Alpha 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
@@ -37,9 +37,8 @@ typedef struct
{
dtv_t *dtv;
- /* Reserved for the thread implementation. In the case of LinuxThreads,
- this is the thread descriptor. */
- void *tcb;
+ /* Reserved for the thread implementation. Unused in LinuxThreads. */
+ void *private;
} tcbhead_t;
#endif
@@ -53,58 +52,72 @@ typedef struct
/* Get system call information. */
# include <sysdep.h>
-/* Get the thread descriptor definition. */
-# include <linuxthreads/descr.h>
-
/* This is the size of the initial TCB. */
-# define TLS_INIT_TCB_SIZE sizeof (tcbhead_t)
+# define TLS_INIT_TCB_SIZE sizeof (tcbhead_t)
/* Alignment requirements for the initial TCB. */
-# define TLS_INIT_TCB_ALIGN __alignof__ (tcbhead_t)
+# define TLS_INIT_TCB_ALIGN __alignof__ (tcbhead_t)
/* This is the size of the TCB. */
-# define TLS_TCB_SIZE sizeof (struct _pthread_descr_struct)
+# define TLS_TCB_SIZE sizeof (tcbhead_t)
/* Alignment requirements for the TCB. */
-# define TLS_TCB_ALIGN __alignof__ (struct _pthread_descr_struct)
+# define TLS_TCB_ALIGN __alignof__ (tcbhead_t)
+
+/* This is the size we need before TCB. */
+# define TLS_PRE_TCB_SIZE sizeof (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(descr, dtvp) \
- ((tcbhead_t *) (descr))->dtv = (dtvp) + 1
+# define INSTALL_DTV(TCBP, DTVP) \
+ (((tcbhead_t *) (TCBP))->dtv = (DTVP) + 1)
/* Install new dtv for current thread. */
# define INSTALL_NEW_DTV(DTV) \
(((tcbhead_t *)__builtin_thread_pointer ())->dtv = (DTV))
/* Return dtv of given thread descriptor. */
-# define GET_DTV(descr) \
- (((tcbhead_t *) (descr))->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(descr, secondcall) \
- ({ \
- register tcbhead_t *__self = (void *)(descr); \
- __self->tcb = __self; \
- __builtin_set_thread_pointer(__self); \
- 0; \
- })
+# define TLS_INIT_TP(TCBP, SECONDCALL) \
+ (__builtin_set_thread_pointer (TCBP), 0)
/* Return the address of the dtv for the current thread. */
# define THREAD_DTV() \
(((tcbhead_t *)__builtin_thread_pointer ())->dtv)
/* Return the thread descriptor for the current thread. */
-#undef THREAD_SELF
-#define THREAD_SELF \
- ((pthread_descr)(((tcbhead_t *)__builtin_thread_pointer ())->tcb))
+# undef THREAD_SELF
+# define THREAD_SELF \
+ ((pthread_descr)__builtin_thread_pointer () - 1)
+
+# undef INIT_THREAD_SELF
+# define INIT_THREAD_SELF(DESCR, NR) \
+ __builtin_set_thread_pointer ((struct _pthread_descr_struct *)(DESCR) + 1)
+
+/* Get the thread descriptor definition. */
+# include <linuxthreads/descr.h>
+
+/* ??? Generic bits of LinuxThreads may call these macros with
+ DESCR set to NULL. We are expected to be able to reference
+ the "current" value.
+
+ In our case, we'd really prefer to use DESCR, since lots of
+ PAL_code calls would be expensive. We can only trust that
+ the compiler does its job and unifies the multiple
+ __builtin_thread_pointer instances. */
-#undef INIT_THREAD_SELF
+#define THREAD_GETMEM(descr, member) THREAD_SELF->member
+#define THREAD_GETMEM_NC(descr, member) THREAD_SELF->member
+#define THREAD_SETMEM(descr, member, value) (THREAD_SELF->member = (value))
+#define THREAD_SETMEM_NC(descr, member, value) (THREAD_SELF->member = (value))
# endif /* HAVE_TLS_SUPPORT */
#endif /* __ASSEMBLER__ */
diff --git a/linuxthreads/sysdeps/unix/sysv/linux/alpha/vfork.S b/linuxthreads/sysdeps/unix/sysv/linux/alpha/vfork.S
index 2481de9a12..e7507245e7 100644
--- a/linuxthreads/sysdeps/unix/sysv/linux/alpha/vfork.S
+++ b/linuxthreads/sysdeps/unix/sysv/linux/alpha/vfork.S
@@ -26,26 +26,35 @@ __LABEL(__vfork)
ldgp gp, 0(pv)
.prologue 1
PSEUDO_PROF
+
SINGLE_THREAD_P(t0)
#ifdef SHARED
bne t0, HIDDEN_JUMPTARGET (__fork) !samegp
#else
- bne t0, $hidden_fork
+ bne t0, $do_fork
#endif
+
lda v0, SYS_ify(vfork)
call_pal PAL_callsys
-#ifdef SHARED
- bne a3, __syscall_error !samegp
-#else
- bne a3, $syscall_error
-#endif
+ bne a3, SYSCALL_ERROR_LABEL
ret
+
#ifndef SHARED
-$hidden_fork:
- jmp zero, HIDDEN_JUMPTARGET (__fork)
+ /* Can't tail-call due to possible mismatch between GP in
+ fork and vfork object files. */
+$do_fork:
+ subq sp, 16, sp
+ stq ra, 0(sp)
+ jsr ra, HIDDEN_JUMPTARGET (__fork)
+ ldgp gp, 0(ra)
+ ldq ra, 0(sp)
+ addq sp, 16, sp
+ ret
+
$syscall_error:
- jmp zero, __syscall_error
+ SYSCALL_ERROR_HANDLER
#endif
+
PSEUDO_END(__vfork)
libc_hidden_def (__vfork)