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Diffstat (limited to 'task/ia32-cmain.c')
| -rw-r--r-- | task/ia32-cmain.c | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/task/ia32-cmain.c b/task/ia32-cmain.c deleted file mode 100644 index 54de638..0000000 --- a/task/ia32-cmain.c +++ /dev/null @@ -1,151 +0,0 @@ -/* ia32-cmain.c - Startup code for the ia32. - Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. - Written by Marcus Brinkmann. - - This file is part of the GNU Hurd. - - The GNU Hurd is free software; you can redistribute it and/or - modify it under the terms of the GNU General Public License as - published by the Free Software Foundation; either version 2, or (at - your option) any later version. - - The GNU Hurd 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 - General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */ - -#if HAVE_CONFIG_H -#include <config.h> -#endif - -#include <alloca.h> -#include <stdint.h> - -#include <l4/globals.h> -#include <l4/init.h> -#include <l4/stubs.h> -#include <l4/stubs-init.h> - -#include "task.h" - -#include <hurd/wortel.h> -#include <hurd/startup.h> -#include <hurd/mm.h> - - -/* Initialized by the machine-specific startup-code. */ -extern struct hurd_startup_data *__hurd_startup_data; - - -/* Initialized in cmain. */ -l4_thread_id_t wortel_thread_id; -wortel_cap_id_t wortel_cap_id; - -l4_thread_id_t pager_tid; - - -/* Initialize libl4, setup the argument vector, and pass control over - to the main function. */ -void -cmain (void) -{ - error_t err; - int argc = 0; - char **argv = 0; - - l4_init (); - l4_init_stubs (); - - wortel_thread_id = __hurd_startup_data->wortel.server; - wortel_cap_id = __hurd_startup_data->wortel.cap_handle; - - pager_tid = l4_global_id (l4_thread_no (l4_my_global_id ()) + 1, - l4_version (l4_my_global_id ())); - - err = wortel_thread_control (pager_tid, l4_my_global_id (), - l4_myself (), pager_tid, - (void *) - (l4_address (__hurd_startup_data->utcb_area) - + l4_utcb_size ())); - if (err) - { - printf ("Unable to allocate a thread for the pager thread.\n"); - for (;;) - ; - } - - - hurd_mm_init (pager_tid); - - l4_set_pager (pager_tid); - - argc = 1; - argv = alloca (sizeof (char *) * 2); - argv[0] = program_name; - argv[1] = 0; - - /* Now invoke the main function. */ - main (argc, argv); - - /* Never reached. */ -} - - -#define __thread_stack_pointer() ({ \ - void *__sp__; \ - __asm__ ("movl %%esp, %0" : "=r" (__sp__)); \ - __sp__; \ -}) - - -#define __thread_set_stack_pointer(sp) ({ \ - __asm__ ("movl %0, %%esp" : : "r" (sp)); \ -}) - - -/* Switch execution transparently to thread TO. The thread FROM, - which must be the current thread, will be halted. */ -void -switch_thread (l4_thread_id_t from, l4_thread_id_t to) -{ - void *current_stack; - /* FIXME: Figure out how much we need. Probably only one return - address. */ - char small_sub_stack[16]; - unsigned int i; - -/* FIXME: FROM is an argument to force gcc to evaluate it before the - thread switch. Maybe this can be done better, but it's - magical, so be careful. */ - - /* Save the machine context. */ - __asm__ __volatile__ ("pusha"); - __asm__ __volatile__ ("pushf"); - - /* Start the TO thread. It will be eventually become a clone of our - thread. */ - current_stack = __thread_stack_pointer (); - l4_start_sp_ip (to, (l4_word_t) current_stack, - (l4_word_t) &&thread_switch_entry); - - /* We need a bit of extra space on the stack for - l4_thread_switch. */ - __thread_set_stack_pointer (small_sub_stack + sizeof (small_sub_stack)); - - /* We can't use while(1), because then gcc will become clever and - optimize away everything after thread_switch_entry. */ - for (i = 1; i; i++) - l4_thread_switch (to); - - thread_switch_entry: - /* Restore the machine context. */ - __asm__ __volatile__ ("popf"); - __asm__ __volatile__ ("popa"); - - /* The thread TO continues here. */ - l4_stop (from); -} |