* 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>.
This commit is contained in:
Roland McGrath
parent
a21d582e68
commit
c35f132002
@ -1,3 +1,12 @@
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2002-06-02 Roland McGrath <roland@frob.com>
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* include/link.h: Include <tls.h> to make sure USE_TLS is defined.
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2002-06-01 Roland McGrath <roland@frob.com>
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* sysdeps/mach/hurd/alpha/init-first.c: New file, modified from
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i386/init-first.c by Andrew M. Miklic <miklic@attglobal.net>.
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2002-05-21 Jakub Jelinek <jakub@redhat.com>
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* resolv/resolv.h (struct __res_state): Remove unused nstimes.
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304
sysdeps/mach/hurd/alpha/init-first.c
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304
sysdeps/mach/hurd/alpha/init-first.c
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@ -0,0 +1,304 @@
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/* Initialization code run first thing by the ELF startup code. Alpha/Hurd.
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Copyright (C) 1995,96,97,98,99,2000,2001,02 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <assert.h>
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#include <hurd.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <sysdep.h>
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#include <set-hooks.h>
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#include "hurdstartup.h"
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#include "hurdmalloc.h" /* XXX */
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extern void __mach_init (void);
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extern void __libc_init (int, char **, char **);
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extern void __init_misc (int, char **, char **);
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#ifdef USE_NONOPTION_FLAGS
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extern void __getopt_clean_environment (char **);
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#endif
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#ifndef SHARED
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extern void _dl_non_dynamic_init (void) internal_function;
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#endif
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extern void __libc_global_ctors (void);
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unsigned int __hurd_threadvar_max;
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unsigned long int __hurd_threadvar_stack_offset;
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unsigned long int __hurd_threadvar_stack_mask;
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#ifndef SHARED
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int __libc_enable_secure;
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#endif
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int __libc_multiple_libcs attribute_hidden = 1;
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extern int __libc_argc attribute_hidden;
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extern char **__libc_argv attribute_hidden;
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extern char **_dl_argv;
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void *(*_cthread_init_routine) (void); /* Returns new SP to use. */
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void (*_cthread_exit_routine) (int status) __attribute__ ((__noreturn__));
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/* Things that want to be run before _hurd_init or much anything else.
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Importantly, these are called before anything tries to use malloc. */
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DEFINE_HOOK (_hurd_preinit_hook, (void));
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/* We call this once the Hurd magic is all set up and we are ready to be a
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Posixoid program. This does the same things the generic version does. */
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static void
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posixland_init (int argc, char **argv, char **envp)
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{
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__libc_argc = argc;
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__libc_argv = argv;
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__environ = envp;
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#ifndef SHARED
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_dl_non_dynamic_init ();
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#endif
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__init_misc (argc, argv, envp);
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__libc_init (argc, argv, envp);
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#ifdef USE_NONOPTION_FLAGS
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/* This is a hack to make the special getopt in GNU libc working. */
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__getopt_clean_environment (envp);
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#endif
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#ifdef SHARED
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__libc_global_ctors ();
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#endif
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}
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static void
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init1 (intptr_t *data)
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{
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int argc = (intptr_t) *data;
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char **argv = &data[1];
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char **envp = &argv[argc + 1];
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struct hurd_startup_data *d;
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while (*envp)
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++envp;
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d = (void *) ++envp;
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/* If we are the bootstrap task started by the kernel,
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then after the environment pointers there is no Hurd
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data block; the argument strings start there. */
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/* OSF Mach starts the bootstrap task with argc == 0.
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XXX This fails if a non-bootstrap task gets started
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with argc == 0. */
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if (argc && (void *) d != argv[0])
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{
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_hurd_init_dtable = d->dtable;
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_hurd_init_dtablesize = d->dtablesize;
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{
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/* Check if the stack we are now on is different from
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the one described by _hurd_stack_{base,size}. */
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char dummy;
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const vm_address_t newsp = (vm_address_t) &dummy;
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if (d->stack_size != 0 && (newsp < d->stack_base ||
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newsp - d->stack_base > d->stack_size))
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/* The new stack pointer does not intersect with the
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stack the exec server set up for us, so free that stack. */
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__vm_deallocate (__mach_task_self (), d->stack_base, d->stack_size);
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}
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}
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if ((void *) d != argv[0] && (d->portarray || d->intarray))
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/* Initialize library data structures, start signal processing, etc. */
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_hurd_init (d->flags, argv,
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d->portarray, d->portarraysize,
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d->intarray, d->intarraysize);
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#ifndef SHARED
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__libc_enable_secure = d->flags & EXEC_SECURE;
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#endif
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}
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static inline void
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init (int *data)
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{
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int argc = *data;
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char **argv = (void *) (data + 1);
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char **envp = &argv[argc + 1];
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struct hurd_startup_data *d;
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unsigned long int threadvars[_HURD_THREADVAR_MAX];
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/* Provide temporary storage for thread-specific variables on the
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startup stack so the cthreads initialization code can use them
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for malloc et al, or so we can use malloc below for the real
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threadvars array. */
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memset (threadvars, 0, sizeof threadvars);
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__hurd_threadvar_stack_offset = (unsigned long int) threadvars;
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/* Since the cthreads initialization code uses malloc, and the
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malloc initialization code needs to get at the environment, make
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sure we can find it. We'll need to do this again later on since
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switching stacks changes the location where the environment is
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stored. */
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__environ = envp;
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while (*envp)
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++envp;
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d = (void *) ++envp;
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/* The user might have defined a value for this, to get more variables.
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Otherwise it will be zero on startup. We must make sure it is set
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properly before before cthreads initialization, so cthreads can know
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how much space to leave for thread variables. */
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if (__hurd_threadvar_max < _HURD_THREADVAR_MAX)
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__hurd_threadvar_max = _HURD_THREADVAR_MAX;
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/* After possibly switching stacks, call `init1' (above) with the user
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code as the return address, and the argument data immediately above
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that on the stack. */
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if (_cthread_init_routine)
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{
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/* Initialize cthreads, which will allocate us a new stack to run on. */
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void *newsp = (*_cthread_init_routine) ();
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struct hurd_startup_data *od;
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void switch_stacks (void);
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/* Copy per-thread variables from that temporary
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area onto the new cthread stack. */
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memcpy (__hurd_threadvar_location_from_sp (0, newsp),
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threadvars, sizeof threadvars);
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/* Copy the argdata from the old stack to the new one. */
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newsp = memcpy (newsp - ((char *) &d[1] - (char *) data), data,
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(char *) d - (char *) data);
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#ifdef SHARED
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/* And readjust the dynamic linker's idea of where the argument
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vector lives. */
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assert (_dl_argv == argv);
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_dl_argv = (void *) ((int *) newsp + 1);
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#endif
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/* Set up the Hurd startup data block immediately following
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the argument and environment pointers on the new stack. */
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od = (newsp + ((char *) d - (char *) data));
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if ((void *) argv[0] == d)
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/* We were started up by the kernel with arguments on the stack.
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There is no Hurd startup data, so zero the block. */
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memset (od, 0, sizeof *od);
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else
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/* Copy the Hurd startup data block to the new stack. */
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*od = *d;
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/*
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Force NEWSP into sp and &init1 into pv, then branch to pv (call init1).
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*/
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asm volatile ("lda $30,0(%0); lda $27,0(%1); jsr $26,($27)"
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: : "r" (newsp), "r" (&init1));
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}
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else
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{
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/* We are not using cthreads, so we will have just a single allocated
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area for the per-thread variables of the main user thread. */
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unsigned long int *array;
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unsigned int i;
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array = malloc (__hurd_threadvar_max * sizeof (unsigned long int));
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if (array == NULL)
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__libc_fatal ("Can't allocate single-threaded thread variables.");
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/* Copy per-thread variables from the temporary array into the
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newly malloc'd space. */
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memcpy (array, threadvars, sizeof threadvars);
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__hurd_threadvar_stack_offset = (unsigned long int) array;
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for (i = _HURD_THREADVAR_MAX; i < __hurd_threadvar_max; ++i)
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array[i] = 0;
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init1 (data);
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}
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}
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/* Do the first essential initializations that must precede all else. */
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static inline void
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first_init (void)
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{
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/* Initialize data structures so we can do RPCs. */
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__mach_init ();
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RUN_HOOK (_hurd_preinit_hook, ());
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}
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#ifdef SHARED
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/* This function is called specially by the dynamic linker to do early
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initialization of the shared C library before normal initializers
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expecting a Posixoid environment can run. It gets called with the
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stack set up just as the user will see it, so it can switch stacks. */
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void
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_dl_init_first (int argc, ...)
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{
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first_init ();
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init (&argc);
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}
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#endif
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#ifdef SHARED
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/* The regular posixland initialization is what goes into libc's
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normal initializer. */
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/* NOTE! The linker notices the magical name `_init' and sets the DT_INIT
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pointer in the dynamic section based solely on that. It is convention
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for this function to be in the `.init' section, but the symbol name is
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the only thing that really matters!! */
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strong_alias (posixland_init, _init);
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void
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__libc_init_first (int argc, char **argv, char **envp)
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{
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/* Everything was done in the shared library initializer, _init. */
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}
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#else
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strong_alias (posixland_init, __libc_init_first);
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void
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_hurd_stack_setup (volatile int argc, ...)
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{
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first_init ();
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_hurd_startup ((void **) &argc, &init);
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}
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#endif
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/* This function is defined here so that if this file ever gets into
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ld.so we will get a link error. Having this file silently included
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in ld.so causes disaster, because the _init definition above will
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cause ld.so to gain an init function, which is not a cool thing. */
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void
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_dl_start (void)
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{
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abort ();
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}
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