* include/link.h: Include <tls.h> to make sure USE_TLS is defined.

2002-06-01  Roland McGrath  <roland@frob.com>

	* sysdeps/mach/hurd/alpha/init-first.c: New file, modified from
	i386/init-first.c by Andrew M. Miklic <miklic@attglobal.net>.

1 files changed, 304 insertions, 0 deletions

diff --git a/sysdeps/mach/hurd/alpha/init-first.c b/sysdeps/mach/hurd/alpha/init-first.c
new file mode 100644
index 0000000000..bb60cd07d2
--- /dev/null
+++ b/sysdeps/mach/hurd/alpha/init-first.c
@@ -0,0 +1,304 @@
+/* Initialization code run first thing by the ELF startup code.  Alpha/Hurd.
+   Copyright (C) 1995,96,97,98,99,2000,2001,02 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.  */
+
+#include <assert.h>
+#include <hurd.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <sysdep.h>
+#include <set-hooks.h>
+#include "hurdstartup.h"
+#include "hurdmalloc.h"		/* XXX */
+
+extern void __mach_init (void);
+extern void __libc_init (int, char **, char **);
+extern void __init_misc (int, char **, char **);
+#ifdef USE_NONOPTION_FLAGS
+extern void __getopt_clean_environment (char **);
+#endif
+#ifndef SHARED
+extern void _dl_non_dynamic_init (void) internal_function;
+#endif
+extern void __libc_global_ctors (void);
+
+unsigned int __hurd_threadvar_max;
+unsigned long int __hurd_threadvar_stack_offset;
+unsigned long int __hurd_threadvar_stack_mask;
+
+#ifndef SHARED
+int __libc_enable_secure;
+#endif
+int __libc_multiple_libcs attribute_hidden = 1;
+
+extern int __libc_argc attribute_hidden;
+extern char **__libc_argv attribute_hidden;
+extern char **_dl_argv;
+
+void *(*_cthread_init_routine) (void); /* Returns new SP to use.  */
+void (*_cthread_exit_routine) (int status) __attribute__ ((__noreturn__));
+
+/* Things that want to be run before _hurd_init or much anything else.
+   Importantly, these are called before anything tries to use malloc.  */
+DEFINE_HOOK (_hurd_preinit_hook, (void));
+
+
+/* We call this once the Hurd magic is all set up and we are ready to be a
+   Posixoid program.  This does the same things the generic version does.  */
+static void
+posixland_init (int argc, char **argv, char **envp)
+{
+  __libc_argc = argc;
+  __libc_argv = argv;
+  __environ = envp;
+
+#ifndef SHARED
+  _dl_non_dynamic_init ();
+#endif
+  __init_misc (argc, argv, envp);
+  __libc_init (argc, argv, envp);
+
+#ifdef USE_NONOPTION_FLAGS
+  /* This is a hack to make the special getopt in GNU libc working.  */
+  __getopt_clean_environment (envp);
+#endif
+
+#ifdef SHARED
+  __libc_global_ctors ();
+#endif
+}
+
+
+static void
+init1 (intptr_t *data)
+{
+  int argc = (intptr_t) *data;
+  char **argv = &data[1];
+  char **envp = &argv[argc + 1];
+  struct hurd_startup_data *d;
+
+  while (*envp)
+    ++envp;
+  d = (void *) ++envp;
+
+  /* If we are the bootstrap task started by the kernel,
+     then after the environment pointers there is no Hurd
+     data block; the argument strings start there.  */
+  /* OSF Mach starts the bootstrap task with argc == 0.
+     XXX This fails if a non-bootstrap task gets started
+     with argc == 0.  */
+  if (argc && (void *) d != argv[0])
+    {
+      _hurd_init_dtable = d->dtable;
+      _hurd_init_dtablesize = d->dtablesize;
+
+      {
+	/* Check if the stack we are now on is different from
+	   the one described by _hurd_stack_{base,size}.  */
+
+	char dummy;
+	const vm_address_t newsp = (vm_address_t) &dummy;
+
+	if (d->stack_size != 0 && (newsp < d->stack_base ||
+				   newsp - d->stack_base > d->stack_size))
+	  /* The new stack pointer does not intersect with the
+	     stack the exec server set up for us, so free that stack.  */
+	  __vm_deallocate (__mach_task_self (), d->stack_base, d->stack_size);
+      }
+    }
+
+  if ((void *) d != argv[0] && (d->portarray || d->intarray))
+    /* Initialize library data structures, start signal processing, etc.  */
+    _hurd_init (d->flags, argv,
+		d->portarray, d->portarraysize,
+		d->intarray, d->intarraysize);
+
+#ifndef SHARED
+  __libc_enable_secure = d->flags & EXEC_SECURE;
+#endif
+}
+
+
+static inline void
+init (int *data)
+{
+  int argc = *data;
+  char **argv = (void *) (data + 1);
+  char **envp = &argv[argc + 1];
+  struct hurd_startup_data *d;
+  unsigned long int threadvars[_HURD_THREADVAR_MAX];
+
+  /* Provide temporary storage for thread-specific variables on the
+     startup stack so the cthreads initialization code can use them
+     for malloc et al, or so we can use malloc below for the real
+     threadvars array.  */
+  memset (threadvars, 0, sizeof threadvars);
+  __hurd_threadvar_stack_offset = (unsigned long int) threadvars;
+
+  /* Since the cthreads initialization code uses malloc, and the
+     malloc initialization code needs to get at the environment, make
+     sure we can find it.  We'll need to do this again later on since
+     switching stacks changes the location where the environment is
+     stored.  */
+  __environ = envp;
+
+  while (*envp)
+    ++envp;
+  d = (void *) ++envp;
+
+  /* The user might have defined a value for this, to get more variables.
+     Otherwise it will be zero on startup.  We must make sure it is set
+     properly before before cthreads initialization, so cthreads can know
+     how much space to leave for thread variables.  */
+  if (__hurd_threadvar_max < _HURD_THREADVAR_MAX)
+    __hurd_threadvar_max = _HURD_THREADVAR_MAX;
+
+
+  /* After possibly switching stacks, call `init1' (above) with the user
+     code as the return address, and the argument data immediately above
+     that on the stack.  */
+
+  if (_cthread_init_routine)
+    {
+      /* Initialize cthreads, which will allocate us a new stack to run on.  */
+      void *newsp = (*_cthread_init_routine) ();
+      struct hurd_startup_data *od;
+
+      void switch_stacks (void);
+
+      /* Copy per-thread variables from that temporary
+	 area onto the new cthread stack.  */
+      memcpy (__hurd_threadvar_location_from_sp (0, newsp),
+	      threadvars, sizeof threadvars);
+
+      /* Copy the argdata from the old stack to the new one.  */
+      newsp = memcpy (newsp - ((char *) &d[1] - (char *) data), data,
+		      (char *) d - (char *) data);
+
+#ifdef SHARED
+      /* And readjust the dynamic linker's idea of where the argument
+         vector lives.  */
+      assert (_dl_argv == argv);
+      _dl_argv = (void *) ((int *) newsp + 1);
+#endif
+
+      /* Set up the Hurd startup data block immediately following
+	 the argument and environment pointers on the new stack.  */
+      od = (newsp + ((char *) d - (char *) data));
+      if ((void *) argv[0] == d)
+	/* We were started up by the kernel with arguments on the stack.
+	   There is no Hurd startup data, so zero the block.  */
+	memset (od, 0, sizeof *od);
+      else
+	/* Copy the Hurd startup data block to the new stack.  */
+	*od = *d;
+
+      /*
+         Force NEWSP into sp and &init1 into pv, then branch to pv (call init1).
+       */
+      asm volatile ("lda $30,0(%0); lda $27,0(%1); jsr $26,($27)"
+		    : : "r" (newsp), "r" (&init1));
+    }
+  else
+    {
+      /* We are not using cthreads, so we will have just a single allocated
+	 area for the per-thread variables of the main user thread.  */
+      unsigned long int *array;
+      unsigned int i;
+
+      array = malloc (__hurd_threadvar_max * sizeof (unsigned long int));
+      if (array == NULL)
+	__libc_fatal ("Can't allocate single-threaded thread variables.");
+
+      /* Copy per-thread variables from the temporary array into the
+	 newly malloc'd space.  */
+      memcpy (array, threadvars, sizeof threadvars);
+      __hurd_threadvar_stack_offset = (unsigned long int) array;
+      for (i = _HURD_THREADVAR_MAX; i < __hurd_threadvar_max; ++i)
+	array[i] = 0;
+
+      init1 (data);
+    }
+}
+
+
+/* Do the first essential initializations that must precede all else.  */
+static inline void
+first_init (void)
+{
+  /* Initialize data structures so we can do RPCs.  */
+  __mach_init ();
+
+  RUN_HOOK (_hurd_preinit_hook, ());
+}
+
+#ifdef SHARED
+/* This function is called specially by the dynamic linker to do early
+   initialization of the shared C library before normal initializers
+   expecting a Posixoid environment can run.  It gets called with the
+   stack set up just as the user will see it, so it can switch stacks.  */
+
+void
+_dl_init_first (int argc, ...)
+{
+  first_init ();
+
+  init (&argc);
+}
+#endif
+
+
+#ifdef SHARED
+/* The regular posixland initialization is what goes into libc's
+   normal initializer.  */
+/* NOTE!  The linker notices the magical name `_init' and sets the DT_INIT
+   pointer in the dynamic section based solely on that.  It is convention
+   for this function to be in the `.init' section, but the symbol name is
+   the only thing that really matters!!  */
+strong_alias (posixland_init, _init);
+
+void
+__libc_init_first (int argc, char **argv, char **envp)
+{
+  /* Everything was done in the shared library initializer, _init.  */
+}
+#else
+strong_alias (posixland_init, __libc_init_first);
+
+
+void
+_hurd_stack_setup (volatile int argc, ...)
+{
+  first_init ();
+
+  _hurd_startup ((void **) &argc, &init);
+}
+#endif
+
+
+/* This function is defined here so that if this file ever gets into
+   ld.so we will get a link error.  Having this file silently included
+   in ld.so causes disaster, because the _init definition above will
+   cause ld.so to gain an init function, which is not a cool thing. */
+
+void
+_dl_start (void)
+{
+  abort ();
+}