patch-2.4.2 linux/arch/s390x/kernel/exec32.c

• Lines: 86
• Date: Tue Feb 13 14:13:44 2001
• Orig file: v2.4.1/linux/arch/s390x/kernel/exec32.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.1/linux/arch/s390x/kernel/exec32.c linux/arch/s390x/kernel/exec32.c
@@ -0,0 +1,85 @@
+/*
+ * 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(&current->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;
+			current->mm->rss++;
+			put_dirty_page(current,page,stack_base);
+		}
+		stack_base += PAGE_SIZE;
+	}
+	up(&current->mm->mmap_sem);
+	
+	return 0;
+}
+