LXR qemu/bsd-user/openbsd/target_os

   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
  25static 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_ */
  57