Viewing file:  exec32.c (1.93 KB) -rw-r--r--
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/*
* Support for 32-bit Linux for S390 ELF binaries.
*
* Copyright (C) 2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Author(s): Gerhard Tonn (ton@de.ibm.com)
*
* Seperated from binfmt_elf32.c to reduce exports for module enablement.
*
*/
#include <linux/config.h>
#include <linux/slab.h>
#include <linux/file.h>
#include <linux/mman.h>
#include <linux/a.out.h>
#include <linux/stat.h>
#include <linux/fcntl.h>
#include <linux/smp_lock.h>
#include <linux/init.h>
#include <linux/pagemap.h>
#include <linux/highmem.h>
#include <linux/spinlock.h>
#define __NO_VERSION__
#include <linux/module.h>
#include <asm/uaccess.h>
#include <asm/pgalloc.h>
#include <asm/mmu_context.h>
#ifdef CONFIG_KMOD
#include <linux/kmod.h>
#endif
extern void put_dirty_page(struct task_struct * tsk, struct page *page, unsigned long address);
#undef STACK_TOP
#define STACK_TOP TASK31_SIZE
int setup_arg_pages32(struct linux_binprm *bprm)
{
unsigned long stack_base;
struct vm_area_struct *mpnt;
int i;
stack_base = STACK_TOP - MAX_ARG_PAGES*PAGE_SIZE;
bprm->p += stack_base;
if (bprm->loader)
bprm->loader += stack_base;
bprm->exec += stack_base;
mpnt = kmem_cache_alloc(vm_area_cachep, SLAB_KERNEL);
if (!mpnt)
return -ENOMEM;
down_write(¤t->mm->mmap_sem);
{
mpnt->vm_mm = current->mm;
mpnt->vm_start = PAGE_MASK & (unsigned long) bprm->p;
mpnt->vm_end = STACK_TOP;
mpnt->vm_page_prot = PAGE_COPY;
mpnt->vm_flags = VM_STACK_FLAGS;
mpnt->vm_ops = NULL;
mpnt->vm_pgoff = 0;
mpnt->vm_file = NULL;
mpnt->vm_private_data = (void *) 0;
insert_vm_struct(current->mm, mpnt);
current->mm->total_vm = (mpnt->vm_end - mpnt->vm_start) >> PAGE_SHIFT;
}
for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
struct page *page = bprm->page[i];
if (page) {
bprm->page[i] = NULL;
put_dirty_page(current,page,stack_base);
}
stack_base += PAGE_SIZE;
}
up_write(¤t->mm->mmap_sem);
return 0;
}
EXPORT_SYMBOL(setup_arg_pages32);
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