bsd-user/openbsd/target_os_stack.h

   1 /*
   2  *  OpenBSD setup_initial_stack() implementation.
   3  *
   4  *  Copyright (c) 2013-14 Stacey D. Son
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #ifndef TARGET_OS_STACK_H
  21 #define TARGET_OS_STACK_H
  22
  23 #include "target_arch_sigtramp.h"
  24
  25 static inline int setup_initial_stack(struct bsd_binprm *bprm, abi_ulong *p,
  26     abi_ulong *stringp)
  27 {
  28     int i;
  29     abi_ulong stack_base;
  30
  31     stack_base = (target_stkbas + target_stksiz) -
  32                   MAX_ARG_PAGES * TARGET_PAGE_SIZE;
  33     if (p) {
  34         *p = stack_base;
  35     }
  36     if (stringp) {
  37         *stringp = stack_base;
  38     }
  39
  40     for (i = 0; i < MAX_ARG_PAGES; i++) {
  41         if (bprm->page[i]) {
  42             info->rss++;
  43             if (!memcpy_to_target(stack_base, bprm->page[i],
  44                         TARGET_PAGE_SIZE)) {
  45                 errno = EFAULT;
  46                 return -1;
  47             }
  48             g_free(bprm->page[i]);
  49         }
  50         stack_base += TARGET_PAGE_SIZE;
  51     }
  52
  53     return 0;
  54 }
  55
  56 #endif /* TARGET_OS_STACK_H */