hurd/hurdstartup.h

   1 /* Data from initial program startup for running under the GNU Hurd.
   2    Copyright (C) 1995-2021 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _HURDSTARTUP_H
  20 #define _HURDSTARTUP_H 1
  21
  22 # include <stdint.h>
  23
  24 /* Interesting data saved from the exec_startup reply.
  25    The DATA argument to *MAIN (see below) points to:
  26
  27     int argc;
  28     char *argv[argc];
  29     char *argv_terminator = NULL;
  30     char *envp[?];
  31     char *envp_terminator = NULL;
  32     struct hurd_startup_data data;
  33
  34 */
  35
  36 struct hurd_startup_data
  37   {
  38     int flags;
  39     mach_port_t *dtable;
  40     mach_msg_type_number_t dtablesize;
  41     mach_port_t *portarray;
  42     mach_msg_type_number_t portarraysize;
  43     int *intarray;
  44     mach_msg_type_number_t intarraysize;
  45     vm_address_t stack_base;
  46     vm_size_t stack_size;
  47     vm_address_t phdr;
  48     vm_size_t phdrsz;
  49     vm_address_t user_entry;
  50   };
  51
  52
  53 /* Initialize Mach RPCs; do initial handshake with the exec server (or
  54    extract the arguments from the stack in the case of the bootstrap task);
  55    finally, call *MAIN with the information gleaned.  That function is not
  56    expected to return.  ARGPTR should be the address of the first argument
  57    of the entry point function that is called with the stack exactly as the
  58    exec server or kernel sets it.  */
  59
  60 extern void _hurd_startup (void **argptr, void (*main) (intptr_t *data));
  61
  62
  63 #endif  /* hurdstartup.h */