2 * Support for 32-bit Linux for S390 ELF binaries.
4 * Copyright (C) 2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
5 * Author(s): Gerhard Tonn (ton@de.ibm.com)
7 * Seperated from binfmt_elf32.c to reduce exports for module enablement.
11 #include <linux/config.h>
12 #include <linux/slab.h>
13 #include <linux/file.h>
14 #include <linux/mman.h>
15 #include <linux/a.out.h>
16 #include <linux/stat.h>
17 #include <linux/fcntl.h>
18 #include <linux/smp_lock.h>
19 #include <linux/init.h>
20 #include <linux/pagemap.h>
21 #include <linux/highmem.h>
22 #include <linux/spinlock.h>
23 #define __NO_VERSION__
24 #include <linux/module.h>
26 #include <asm/uaccess.h>
27 #include <asm/pgalloc.h>
28 #include <asm/mmu_context.h>
31 #include <linux/kmod.h>
35 extern void put_dirty_page(struct task_struct * tsk, struct page *page, unsigned long address);
38 #define STACK_TOP TASK31_SIZE
40 int setup_arg_pages32(struct linux_binprm *bprm)
42 unsigned long stack_base;
43 struct vm_area_struct *mpnt;
46 stack_base = STACK_TOP - MAX_ARG_PAGES*PAGE_SIZE;
48 bprm->p += stack_base;
50 bprm->loader += stack_base;
51 bprm->exec += stack_base;
53 mpnt = kmem_cache_alloc(vm_area_cachep, SLAB_KERNEL);
57 down_write(¤t->mm->mmap_sem);
59 mpnt->vm_mm = current->mm;
60 mpnt->vm_start = PAGE_MASK & (unsigned long) bprm->p;
61 mpnt->vm_end = STACK_TOP;
62 mpnt->vm_page_prot = PAGE_COPY;
63 mpnt->vm_flags = VM_STACK_FLAGS;
67 mpnt->vm_private_data = (void *) 0;
68 if ((ret = insert_vm_struct(current->mm, mpnt))) {
69 up_write(¤t->mm->mmap_sem);
70 kmem_cache_free(vm_area_cachep, mpnt);
73 current->mm->total_vm = (mpnt->vm_end - mpnt->vm_start) >> PAGE_SHIFT;
76 for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
77 struct page *page = bprm->page[i];
80 put_dirty_page(current,page,stack_base);
82 stack_base += PAGE_SIZE;
84 up_write(¤t->mm->mmap_sem);
89 EXPORT_SYMBOL(setup_arg_pages32);