linuxthreads/ChangeLog

2003-02-25  Roland McGrath  <roland@redhat.com>


	* sysdeps/powerpc/powerpc64/dl-machine.h: Support new TLS relocs.
	* sysdeps/powerpc/powerpc64/dl-tls.h: New file.

18 files changed, 474 insertions, 48 deletions

diff --git a/ChangeLog b/ChangeLog
index c1d3baab55..b4aca0aedf 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,6 @@
+2003-02-25  Roland McGrath  <roland@redhat.com>
+
+
 2003-02-25  Steven Munroe  <sjmunroe@us.ibm.com>
 
         * elf/elf.h: Add new R_PPC64_* relocs for TLS.
@@ -5,6 +8,8 @@
         (TLS_LE, TLS_IE, TLS_LD, TLS_GD): Define.
 	* sysdeps/powerpc/powerpc64/elf/configure.in: New file.
 	* sysdeps/powerpc/powerpc64/elf/configure: New file (generated).
+	* sysdeps/powerpc/powerpc64/dl-machine.h: Support new TLS relocs.
+	* sysdeps/powerpc/powerpc64/dl-tls.h: New file.
 
         * sysdeps/powerpc/elf/libc-start.c (__libc_start_main):
 	Do DL_SYSDEP_OSCHECK here, matching 2002-12-01 change to generic file.
diff --git a/configure.in b/configure.in
index f7d8471cfe..fb801a7738 100644
--- a/configure.in
+++ b/configure.in
@@ -1111,7 +1111,7 @@ EOF
 		  int bar __attribute__ ((visibility ("protected"))) = 1;
 EOF
 		  libc_cv_visibility_attribute=no
-		  if ${CC-cc} -Werror -S conftest.c -o conftest.s >/dev/null 2>&1; then
+		  if AC_TRY_COMMAND[${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD]; then
 		    if grep '\.hidden.*foo' conftest.s >/dev/null; then
 		      if grep '\.protected.*bar' conftest.s >/dev/null; then
 			libc_cv_visibility_attribute=yes
@@ -1134,7 +1134,7 @@ EOF
 		  int bar (int x) { return x; }
 EOF
 		  libc_cv_broken_visibility_attribute=yes
-		  if ${CC-cc} -Werror -S conftest.c -o conftest.s >/dev/null 2>&1; then
+		  if ${CC-cc} -Werror -S conftest.c -o conftest.s >&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
 changequote(,)dnl
 		    if grep '\.hidden[ 	_]foo' conftest.s >/dev/null; then
 changequote([,])dnl
diff --git a/dlfcn/Makefile b/dlfcn/Makefile
index 40eb7888cc..9cff10baba 100644
--- a/dlfcn/Makefile
+++ b/dlfcn/Makefile
@@ -37,7 +37,7 @@ libdl-shared-only-routines += eval
 
 ifeq (yes,$(build-shared))
 tests = glrefmain failtest tst-dladdr default errmsg1 tstcxaatexit \
-	bug-dlopen1 bug-dlsym1
+	bug-dlopen1 bug-dlsym1 bug-dlopen-leak
 ifeq (yes,$(have-protected))
 tests += tstatexit
 endif
@@ -99,6 +99,14 @@ $(objpfx)modstatic.so: $(common-objpfx)libc.so $(common-objpfx)libc_nonshared.a
 
 $(objpfx)bug-dlopen1: $(libdl)
 
+$(objpfx)bug-dlopen-leak: $(libdl)
+bug-dlopen-leak-ENV = MALLOC_TRACE=$(objpfx)bug-dlopen-leak.mtrace
+$(objpfx)mtrace-bug-dlopen-leak: $(objpfx)bug-dlopen-leak.out
+	$(common-objpfx)malloc/mtrace $(objpfx)bug-dlopen-leak.mtrace > $@
+ifneq (no,$(PERL))
+tests: $(objpfx)mtrace-bug-dlopen-leak
+endif
+
 $(objpfx)bug-dlsym1: $(libdl) $(objpfx)bug-dlsym1-lib2.so
 $(objpfx)bug-dlsym1.out: $(objpfx)bug-dlsym1-lib1.so \
 			 $(objpfx)bug-dlsym1-lib2.so
diff --git a/linuxthreads/ChangeLog b/linuxthreads/ChangeLog
index adfaaa8f0e..de105a6649 100644
--- a/linuxthreads/ChangeLog
+++ b/linuxthreads/ChangeLog
@@ -1,3 +1,8 @@
+2003-01-31  Steven Munroe  <sjmunroe@us.ibm.com>
+
+        * sysdeps/unix/sysv/linux/powerpc/powerpc64/vfork.S [SHARED]:
+	Conditionalize .toc section magic on this.
+
 2003-02-21  Roland McGrath  <roland@redhat.com>
 
 	* cancel.c (__pthread_perform_cleanup): Call __libc_thread_freeres
diff --git a/linuxthreads/sysdeps/i386/i686/pt-machine.h b/linuxthreads/sysdeps/i386/i686/pt-machine.h
index 3c28118f2e..2368c29098 100644
--- a/linuxthreads/sysdeps/i386/i686/pt-machine.h
+++ b/linuxthreads/sysdeps/i386/i686/pt-machine.h
@@ -33,7 +33,8 @@ extern int __compare_and_swap (long int *p, long int oldval, long int newval);
 
 /* 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  __builtin_frame_address (0)
+#define CURRENT_STACK_FRAME  __stack_pointer_register__
+register char *__stack_pointer_register__ __asm__ ("%esp");
 
 
 /* Spinlock implementation; required.  */
diff --git a/linuxthreads/sysdeps/i386/pt-machine.h b/linuxthreads/sysdeps/i386/pt-machine.h
index 79c69b549a..465ab9f919 100644
--- a/linuxthreads/sysdeps/i386/pt-machine.h
+++ b/linuxthreads/sysdeps/i386/pt-machine.h
@@ -32,7 +32,8 @@ extern int __compare_and_swap (long int *p, long int oldval, long int newval);
 
 /* 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  __builtin_frame_address (0)
+#define CURRENT_STACK_FRAME  __stack_pointer_register__
+register char *__stack_pointer_register__ __asm__ ("%esp");
 
 
 /* Spinlock implementation; required.  */
diff --git a/linuxthreads/sysdeps/i386/tls.h b/linuxthreads/sysdeps/i386/tls.h
index 118c9c02d1..db68e1c21c 100644
--- a/linuxthreads/sysdeps/i386/tls.h
+++ b/linuxthreads/sysdeps/i386/tls.h
@@ -58,7 +58,7 @@ typedef struct
 
    We need USE_TLS to be consistently defined, for ldsodefs.h conditionals.
    But some of the code below can cause problems in building libpthread
-   (e.g. useldt.h will defined FLOATING_STACKS when it shouldn't).  */
+   (e.g. useldt.h will define FLOATING_STACKS when it shouldn't).  */
 
 #if defined HAVE_TLS_SUPPORT \
     && (defined FLOATING_STACKS || !defined IS_IN_libpthread)
diff --git a/linuxthreads/sysdeps/powerpc/powerpc64/tls.h b/linuxthreads/sysdeps/powerpc/powerpc64/tls.h
new file mode 100644
index 0000000000..fefb452cc2
--- /dev/null
+++ b/linuxthreads/sysdeps/powerpc/powerpc64/tls.h
@@ -0,0 +1,134 @@
+/* Definitions for thread-local data handling.  linuxthreads/PowerPC64 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
+{
+  dtv_t *dtv;
+
+  /* Reserved for the thread implementation.  Unused in LinuxThreads.  */
+  void *private;
+} tcbhead_t;
+#endif
+
+
+#ifdef HAVE_TLS_SUPPORT
+
+/* Signal that TLS support is available.  */
+# define USE_TLS	1
+
+# ifndef __ASSEMBLER__
+/* Get system call information.  */
+#  include <sysdep.h>
+
+/* This is the size of the initial TCB.  */
+#  define TLS_INIT_TCB_SIZE	sizeof (tcbhead_t)
+
+/* Alignment requirements for the initial TCB.  */
+#  define TLS_INIT_TCB_ALIGN	__alignof__ (tcbhead_t)
+
+/* This is the size of the TCB.  */
+#  define TLS_TCB_SIZE		sizeof (tcbhead_t)
+
+/* Alignment requirements for the TCB.  */
+#  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 following assumes that TP (R13) is points to the end of the tcb
+   + 0x7000 (per the ABI).  This implies that tcb address is
+   R13-(TLS_TCB_SIZE + 0x7000).  As we define TLS_DTV_AT_TP we can
+   assume that the pthread_descr is allocate immediately ahead of the
+   tcb.  This implies that the pthread_descr address is
+   R13-(TLS_PRE_TCB_SIZE + TLS_TCB_SIZE + 0x7000).  */
+#  define TLS_TCB_OFFSET 0x7000
+
+/* The DTV is allocated at the TP; the TCB is placed elsewhere.  */
+/* This is not really true for powerpc64.  We are following alpha
+   where the DTV pointer is first doubleword in the TCB.  */
+#  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(TCBP, DTVP) \
+  (((tcbhead_t *) (TCBP))->dtv = (DTVP) + 1)
+
+/* Install new dtv for current thread.  */
+#  define INSTALL_NEW_DTV(DTV) (THREAD_DTV() = (DTV))
+
+/* Return dtv of given thread descriptor.  */
+#  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) \
+    (__thread_self = (uintptr_t) (TCBP) + TLS_TCB_OFFSET + TLS_TCB_SIZE, 0)
+
+/* Return the address of the dtv for the current thread.  */
+#  define THREAD_DTV() \
+    (((tcbhead_t *) (__thread_register     - (TLS_TCB_OFFSET + TLS_TCB_SIZE)))->dtv)
+
+/* Return the thread descriptor for the current thread.  */
+#  undef THREAD_SELF
+#  define THREAD_SELF \
+    ((pthread_descr) (__thread_register \
+    - (TLS_TCB_OFFSET + TLS_TCB_SIZE + TLS_PRE_TCB_SIZE)))
+
+#  undef INIT_THREAD_SELF
+#  define INIT_THREAD_SELF(DESCR, NR) \
+    (__thread_self = (pthread_descr) (((char *)(DESCR)) \
+    + (TLS_TCB_OFFSET + TLS_TCB_SIZE + TLS_PRE_TCB_SIZE)))
+
+/* 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.  */
+
+#define THREAD_GETMEM(descr, member) \
+  ((void) sizeof (descr), THREAD_SELF->member)
+#define THREAD_GETMEM_NC(descr, member) \
+  ((void) sizeof (descr), THREAD_SELF->member)
+#define THREAD_SETMEM(descr, member, value) \
+  ((void) sizeof (descr), THREAD_SELF->member = (value))
+#define THREAD_SETMEM_NC(descr, member, value) \
+  ((void) sizeof (descr), THREAD_SELF->member = (value))
+
+# endif	/* HAVE_TLS_SUPPORT */
+#endif /* __ASSEMBLER__ */
+
+#endif	/* tls.h */
diff --git a/linuxthreads/sysdeps/unix/sysv/linux/powerpc/powerpc64/vfork.S b/linuxthreads/sysdeps/unix/sysv/linux/powerpc/powerpc64/vfork.S
index 0229a9a75c..b408e31b7b 100644
--- a/linuxthreads/sysdeps/unix/sysv/linux/powerpc/powerpc64/vfork.S
+++ b/linuxthreads/sysdeps/unix/sysv/linux/powerpc/powerpc64/vfork.S
@@ -25,17 +25,19 @@
    The calling process is suspended until the new process exits or is
    replaced by a call to `execve'.  Return -1 for errors, 0 to the new process,
    and the process ID of the new process to the old process.  */
-   
+
+#ifdef SHARED
 	.section	".toc","aw"
 .LC0:
 	.tc __libc_pthread_functions[TC],__libc_pthread_functions
 	.section	".text"
 	.align 2
+#endif
 
 ENTRY (__vfork)
 
 #ifdef __NR_vfork
-	
+
 # ifdef SHARED
   ld  10,.LC0@toc(2)
   ld  10,0(10)
@@ -53,7 +55,7 @@ ENTRY (__vfork)
 # endif
 
 	DO_CALL (SYS_ify (vfork));
-	
+
 # ifdef __ASSUME_VFORK_SYSCALL
   PSEUDO_RET
 # else
diff --git a/mach/Versions b/mach/Versions
index 18ec511d91..d2b8402aa6 100644
--- a/mach/Versions
+++ b/mach/Versions
@@ -70,6 +70,9 @@ libc {
     # This was always there, but not exported as it should have been.
     mig_strncpy;
   }
+  GLIBC_2.3 {
+    NDR_record;
+  }
 
 %if !SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2)
   HURD_CTHREADS_0.3 {
diff --git a/sysdeps/mach/alpha/machine-lock.h b/sysdeps/mach/alpha/machine-lock.h
index 80f8750c87..363c29e56f 100644
--- a/sysdeps/mach/alpha/machine-lock.h
+++ b/sysdeps/mach/alpha/machine-lock.h
@@ -1,5 +1,5 @@
 /* Machine-specific definition for spin locks.  Alpha version.
-   Copyright (C) 1994, 1997 Free Software Foundation, Inc.
+   Copyright (C) 1994,97,2002 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
@@ -38,8 +38,8 @@ typedef __volatile long int __spin_lock_t;
 _EXTERN_INLINE void
 __spin_unlock (__spin_lock_t *__lock)
 {
-  __asm__ __volatile__ ("mb; stq $31, %0; mb"
-			: "=m" (__lock));
+  __asm__ __volatile__ ("mb");
+  *__lock = 0;
 }
 
 /* Try to lock LOCK; return nonzero if we locked it, zero if another has.  */
@@ -47,6 +47,9 @@ __spin_unlock (__spin_lock_t *__lock)
 _EXTERN_INLINE int
 __spin_try_lock (register __spin_lock_t *__lock)
 {
+#if 1
+  return 1;
+#else
   register long int __rtn, __tmp;
 
   do
@@ -66,6 +69,7 @@ __spin_try_lock (register __spin_lock_t *__lock)
    } while (! __rtn);
   /* RTN is now nonzero; we have the lock.  */
   return __rtn;
+#endif
 }
 
 /* Return nonzero if LOCK is locked.  */
diff --git a/sysdeps/mach/configure b/sysdeps/mach/configure
index 597a0a5b1b..6fd414845f 100644
--- a/sysdeps/mach/configure
+++ b/sysdeps/mach/configure
@@ -102,7 +102,7 @@ _ACEOF
 if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
   (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
   ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
+  egrep -v '^ *\+' conftest.er1 >conftest.err
   rm -f conftest.er1
   cat conftest.err >&5
   echo "$as_me:$LINENO: \$? = $ac_status" >&5
@@ -148,7 +148,7 @@ _ACEOF
 if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
   (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
   ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
+  egrep -v '^ *\+' conftest.er1 >conftest.err
   rm -f conftest.er1
   cat conftest.err >&5
   echo "$as_me:$LINENO: \$? = $ac_status" >&5
@@ -193,6 +193,12 @@ else
 #line $LINENO "configure"
 #include "confdefs.h"
 #include <mach/mach_types.h>
+#ifdef F77_DUMMY_MAIN
+#  ifdef __cplusplus
+     extern "C"
+#  endif
+   int F77_DUMMY_MAIN() { return 1; }
+#endif
 int
 main ()
 {
@@ -235,6 +241,12 @@ else
 #line $LINENO "configure"
 #include "confdefs.h"
 #include <mach/mach_types.h>
+#ifdef F77_DUMMY_MAIN
+#  ifdef __cplusplus
+     extern "C"
+#  endif
+   int F77_DUMMY_MAIN() { return 1; }
+#endif
 int
 main ()
 {
@@ -278,6 +290,12 @@ else
 #line $LINENO "configure"
 #include "confdefs.h"
 #include <mach/task_info.h>
+#ifdef F77_DUMMY_MAIN
+#  ifdef __cplusplus
+     extern "C"
+#  endif
+   int F77_DUMMY_MAIN() { return 1; }
+#endif
 int
 main ()
 {
@@ -336,7 +354,7 @@ _ACEOF
 if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
   (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
   ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
+  egrep -v '^ *\+' conftest.er1 >conftest.err
   rm -f conftest.er1
   cat conftest.err >&5
   echo "$as_me:$LINENO: \$? = $ac_status" >&5
@@ -372,21 +390,6 @@ echo "$as_me: error: what manner of Mach is this?" >&2;}
    { (exit 1); exit 1; }; }
 fi
 
-echo "$as_me:$LINENO: checking for egrep" >&5
-echo $ECHO_N "checking for egrep... $ECHO_C" >&6
-if test "${ac_cv_prog_egrep+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  if echo a | (grep -E '(a|b)') >/dev/null 2>&1
-    then ac_cv_prog_egrep='grep -E'
-    else ac_cv_prog_egrep='egrep'
-    fi
-fi
-echo "$as_me:$LINENO: result: $ac_cv_prog_egrep" >&5
-echo "${ECHO_T}$ac_cv_prog_egrep" >&6
- EGREP=$ac_cv_prog_egrep
-
-
 echo "$as_me:$LINENO: checking for host_page_size in mach_host.defs" >&5
 echo $ECHO_N "checking for host_page_size in mach_host.defs... $ECHO_C" >&6
 if test "${libc_cv_mach_host_page_size+set}" = set; then
@@ -399,7 +402,7 @@ else
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
-  $EGREP "host_page_size" >/dev/null 2>&1; then
+  egrep "host_page_size" >/dev/null 2>&1; then
   libc_cv_mach_host_page_size=yes
 else
   libc_cv_mach_host_page_size=no
@@ -429,7 +432,7 @@ _ACEOF
 if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
   (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
   ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
+  egrep -v '^ *\+' conftest.er1 >conftest.err
   rm -f conftest.er1
   cat conftest.err >&5
   echo "$as_me:$LINENO: \$? = $ac_status" >&5
@@ -469,7 +472,7 @@ _ACEOF
 if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
   (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
   ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
+  egrep -v '^ *\+' conftest.er1 >conftest.err
   rm -f conftest.er1
   cat conftest.err >&5
   echo "$as_me:$LINENO: \$? = $ac_status" >&5
@@ -514,7 +517,7 @@ else
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
-  $EGREP "i386_io_perm_modify" >/dev/null 2>&1; then
+  egrep "i386_io_perm_modify" >/dev/null 2>&1; then
   libc_cv_mach_i386_ioports=yes
 else
   libc_cv_mach_i386_ioports=no
@@ -543,7 +546,7 @@ else
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
-  $EGREP "i386_set_gdt" >/dev/null 2>&1; then
+  egrep "i386_set_gdt" >/dev/null 2>&1; then
   libc_cv_mach_i386_gdt=yes
 else
   libc_cv_mach_i386_gdt=no
diff --git a/sysdeps/mach/hurd/alpha/tls.h b/sysdeps/mach/hurd/alpha/tls.h
new file mode 100644
index 0000000000..e820a013bf
--- /dev/null
+++ b/sysdeps/mach/hurd/alpha/tls.h
@@ -0,0 +1,53 @@
+/* Definition for thread-local data handling.  Hurd/Alpha version.
+   Copyright (C) 2002 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
+
+#if defined HAVE_TLS_SUPPORT && 0
+
+/* Signal that TLS support is available.  */
+# define USE_TLS	1
+
+/* 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)						      \
+  do									      \
+  {									      \
+    register tcbhead_t *_a0 __asm__ ("$16") = (descr);			      \