Update.

2003-02-17  Kevin B. Hendricks  <kevin.hendricks@sympatico.ca>
	    Franz Sirl  <Franz.Sirl-kernel@lauterbach.com>

	* sysdeps/powerpc/elf/libc-start.c: Handle NONTLS_INIT_TP.
	* sysdeps/powerpc/powerpc32/__longjmp.S: Remove R2 handling.
	* sysdeps/powerpc/powerpc32/setjmp.S: Likewise.
	* sysdeps/powerpc/powerpc32/fpu/__longjmp.S: Likewise.
	* sysdeps/powerpc/powerpc32/fpu/setjmp.S: Likewise.

6 files changed, 120 insertions, 18 deletions

diff --git a/linuxthreads/ChangeLog b/linuxthreads/ChangeLog
index 4f1d89909f..5a187ab57e 100644
--- a/linuxthreads/ChangeLog
+++ b/linuxthreads/ChangeLog
@@ -1,3 +1,21 @@
+2003-02-17  Kevin B. Hendricks  <kevin.hendricks@sympatico.ca>
+	    Franz Sirl  <Franz.Sirl-kernel@lauterbach.com>
+
+	* sysdeps/powerpc/Makefile: Handle tcb-offsets.sym.
+	* sysdeps/powerpc/tcb-offsets.sym: New file.
+	* sysdeps/powerpc/tls.h: New file.
+	* sysdeps/powerpc/powerpc32/pt-machine.h (FLOATING_STACKS): Define.
+	(ARCH_STACK_MAX_SIZE): Define.
+	(THREAD_SELF): Define.
+	(INIT_THREAD_SELF): Define.
+	(THREAD_GETMEM): Define.
+	(THREAD_GETMEM_NC): Define.
+	(THREAD_SETMEM): Define.
+	(THREAD_SETMEM_NC): Define.
+	(__thread_self): Declare.
+	* sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep-cancel.h: Adjust
+	for thread register.
+
 2003-02-14  Steven Munroe  <sjmunroe@us.ibm.com>
 
 	* sysdeps/unix/sysv/linux/powerpc/powerpc64/vfork.S (__vfork):
diff --git a/linuxthreads/sysdeps/powerpc/Makefile b/linuxthreads/sysdeps/powerpc/Makefile
index 37eb22ed34..33e4aceb5b 100644
--- a/linuxthreads/sysdeps/powerpc/Makefile
+++ b/linuxthreads/sysdeps/powerpc/Makefile
@@ -2,3 +2,6 @@ ifeq ($(subdir):$(elf),linuxthreads:yes)
 # See CFLAGS-initfini.s above; this is the same code.
 CFLAGS-pt-initfini.s = -g0 -fpic -O1
 endif
+ifeq ($(subdir),csu)
+gen-as-const-headers += tcb-offsets.sym
+endif
diff --git a/linuxthreads/sysdeps/powerpc/powerpc32/pt-machine.h b/linuxthreads/sysdeps/powerpc/powerpc32/pt-machine.h
index 19b77b7e6a..f38f466bc3 100644
--- a/linuxthreads/sysdeps/powerpc/powerpc32/pt-machine.h
+++ b/linuxthreads/sysdeps/powerpc/powerpc32/pt-machine.h
@@ -36,11 +36,37 @@ extern int __compare_and_swap (long int *p, long int oldval, long int newval);
    need to make sure that the compiler has flushed everything to memory.  */
 #define MEMORY_BARRIER() __asm__ __volatile__ ("sync" : : : "memory")
 
+/* We want the OS to assign stack addresses.  */
+#define FLOATING_STACKS 1
+
+/* Maximum size of the stack if the rlimit is unlimited.  */
+#define ARCH_STACK_MAX_SIZE     8*1024*1024
+
 /* Get some notion of the current stack.  Need not be exactly the top
    of the stack, just something somewhere in the current frame.  */
 #define CURRENT_STACK_FRAME  stack_pointer
 register char * stack_pointer __asm__ ("r1");
 
+/* Register r2 (tp) is reserved by the ABI as "thread pointer". */
+struct _pthread_descr_struct;
+register struct _pthread_descr_struct *__thread_self __asm__("r2");
+
+/* Return the thread descriptor for the current thread.  */
+#define THREAD_SELF  __thread_self
+
+/* Initialize the thread-unique value.  */
+#define INIT_THREAD_SELF(descr, nr)  (__thread_self = (descr))
+
+/* Access to data in the thread descriptor is easy.  */
+#define THREAD_GETMEM(descr, member) \
+  ((void) (descr), THREAD_SELF->member)
+#define THREAD_GETMEM_NC(descr, member) \
+  ((void) (descr), THREAD_SELF->member)
+#define THREAD_SETMEM(descr, member, value) \
+  ((void) (descr), THREAD_SELF->member = (value))
+#define THREAD_SETMEM_NC(descr, member, value) \
+  ((void) (descr), THREAD_SELF->member = (value))
+
 /* Compare-and-swap for semaphores. */
 /* note that test-and-set(x) is the same as !compare-and-swap(x, 0, 1) */
 
diff --git a/linuxthreads/sysdeps/powerpc/tcb-offsets.sym b/linuxthreads/sysdeps/powerpc/tcb-offsets.sym
new file mode 100644
index 0000000000..aee6be2570
--- /dev/null
+++ b/linuxthreads/sysdeps/powerpc/tcb-offsets.sym
@@ -0,0 +1,4 @@
+#include <sysdep.h>
+#include <tls.h>
+
+MULTIPLE_THREADS_OFFSET		offsetof (tcbhead_t, multiple_threads)
diff --git a/linuxthreads/sysdeps/powerpc/tls.h b/linuxthreads/sysdeps/powerpc/tls.h
new file mode 100644
index 0000000000..5b234d9882
--- /dev/null
+++ b/linuxthreads/sysdeps/powerpc/tls.h
@@ -0,0 +1,63 @@
+/* Definitions for thread-local data handling.  linuxthreads/PPC version.
+   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
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifndef _TLS_H
+#define _TLS_H
+
+#ifndef __ASSEMBLER__
+
+# include <pt-machine.h>
+# include <stddef.h>
+
+/* Type for the dtv.  */
+typedef union dtv
+{
+  size_t counter;
+  void *pointer;
+} dtv_t;
+
+typedef struct
+{
+  void *tcb;		/* Pointer to the TCB.  Not necessary the
+			   thread descriptor used by libpthread.  */
+  dtv_t *dtv;
+  void *self;		/* Pointer to the thread descriptor.  */
+  int multiple_threads;
+} tcbhead_t;
+
+#else /* __ASSEMBLER__ */
+# include <tcb-offsets.h>
+#endif /* __ASSEMBLER__ */
+
+#undef USE_TLS
+
+#if USE_TLS
+
+#else
+
+#define NONTLS_INIT_TP							\
+  do {									\
+    static const tcbhead_t nontls_init_tp				\
+      = { .multiple_threads = 0 };					\
+    __thread_self = (__typeof (__thread_self)) &nontls_init_tp;		\
+  } while (0)
+
+#endif /* USE_TLS */
+
+#endif	/* tls.h */
diff --git a/linuxthreads/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep-cancel.h b/linuxthreads/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep-cancel.h
index 94da65fdb0..155ea47d84 100644
--- a/linuxthreads/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep-cancel.h
+++ b/linuxthreads/sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep-cancel.h
@@ -18,6 +18,7 @@
    02111-1307 USA.  */
 
 #include <sysdep.h>
+#include <tls.h>
 #ifndef __ASSEMBLER__
 # include <linuxthreads/internals.h>
 #endif
@@ -77,32 +78,19 @@
 # ifdef IS_IN_libpthread
 #  define CENABLE	bl JUMPTARGET(__pthread_enable_asynccancel)
 #  define CDISABLE	bl JUMPTARGET(__pthread_disable_asynccancel)
-#  define __local_multiple_threads __pthread_multiple_threads
 # else
 #  define CENABLE	bl JUMPTARGET(__libc_enable_asynccancel)
 #  define CDISABLE	bl JUMPTARGET(__libc_disable_asynccancel)
-#  define __local_multiple_threads __libc_multiple_threads
 # endif
 
 # ifndef __ASSEMBLER__
-extern int __local_multiple_threads attribute_hidden;
-#  define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
+#  define SINGLE_THREAD_P						\
+  __builtin_expect (THREAD_GETMEM (THREAD_SELF,				\
+				     p_header.data.multiple_threads) == 0, 1)
 # else
-#  if !defined PIC
-#   define SINGLE_THREAD_P						\
-  lis 10,__local_multiple_threads@ha;					\
-  lwz 10,__local_multiple_threads@l(10);				\
+#  define SINGLE_THREAD_P						\
+  lwz 10,MULTIPLE_THREADS_OFFSET(2);					\
   cmpwi 10,0
-#  else
-#   define SINGLE_THREAD_P						\
-  mflr 9;								\
-  bl _GLOBAL_OFFSET_TABLE_@local-4;					\
-  mflr 10;								\
-  mtlr 9;								\
-  lwz 10,__local_multiple_threads@got(10);				\
-  lwz 10,0(10);								\
-  cmpwi 10,0
-#  endif
 # endif
 
 #elif !defined __ASSEMBLER__