1 files changed, 123 insertions, 0 deletions

diff --git a/arch/frv/mm/elf-fdpic.c b/arch/frv/mm/elf-fdpic.c
new file mode 100644
index 000000000000..f5a653033fe0
--- /dev/null
+++ b/arch/frv/mm/elf-fdpic.c
@@ -0,0 +1,123 @@
+/* elf-fdpic.c: ELF FDPIC memory layout management
+ *
+ * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/fs.h>
+#include <linux/elf-fdpic.h>
+
+/*****************************************************************************/
+/*
+ * lay out the userspace VM according to our grand design
+ */
+#ifdef CONFIG_MMU
+void elf_fdpic_arch_lay_out_mm(struct elf_fdpic_params *exec_params,
+                               struct elf_fdpic_params *interp_params,
+                               unsigned long *start_stack,
+                               unsigned long *start_brk)
+{
+        *start_stack = 0x02200000UL;
+
+        /* if the only executable is a shared object, assume that it is an interpreter rather than
+         * a true executable, and map it such that "ld.so --list" comes out right
+         */
+        if (!(interp_params->flags & ELF_FDPIC_FLAG_PRESENT) &&
+            exec_params->hdr.e_type != ET_EXEC
+            ) {
+                exec_params->load_addr = PAGE_SIZE;
+
+                *start_brk = 0x80000000UL;
+        }
+        else {
+                exec_params->load_addr = 0x02200000UL;
+
+                if ((exec_params->flags & ELF_FDPIC_FLAG_ARRANGEMENT) ==
+                    ELF_FDPIC_FLAG_INDEPENDENT
+                    ) {
+                        exec_params->flags &= ~ELF_FDPIC_FLAG_ARRANGEMENT;
+                        exec_params->flags |= ELF_FDPIC_FLAG_CONSTDISP;
+                }
+        }
+
+} /* end elf_fdpic_arch_lay_out_mm() */
+#endif
+
+/*****************************************************************************/
+/*
+ * place non-fixed mmaps firstly in the bottom part of memory, working up, and then in the top part
+ * of memory, working down
+ */
+unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len,
+                                     unsigned long pgoff, unsigned long flags)
+{
+        struct vm_area_struct *vma;
+        unsigned long limit;
+
+        if (len > TASK_SIZE)
+                return -ENOMEM;
+
+        /* only honour a hint if we're not going to clobber something doing so */
+        if (addr) {
+                addr = PAGE_ALIGN(addr);
+                vma = find_vma(current->mm, addr);
+                if (TASK_SIZE - len >= addr &&
+                    (!vma || addr + len <= vma->vm_start))
+                        goto success;
+        }
+
+        /* search between the bottom of user VM and the stack grow area */
+        addr = PAGE_SIZE;
+        limit = (current->mm->start_stack - 0x00200000);
+        if (addr + len <= limit) {
+                limit -= len;
+
+                if (addr <= limit) {
+                        vma = find_vma(current->mm, PAGE_SIZE);
+                        for (; vma; vma = vma->vm_next) {
+                                if (addr > limit)
+                                        break;
+                                if (addr + len <= vma->vm_start)
+                                        goto success;
+                                addr = vma->vm_end;
+                        }
+                }
+        }
+
+        /* search from just above the WorkRAM area to the top of memory */
+        addr = PAGE_ALIGN(0x80000000);
+        limit = TASK_SIZE - len;
+        if (addr <= limit) {
+                vma = find_vma(current->mm, addr);
+                for (; vma; vma = vma->vm_next) {
+                        if (addr > limit)
+                                break;
+                        if (addr + len <= vma->vm_start)
+                                goto success;
+                        addr = vma->vm_end;
+                }
+
+                if (!vma && addr <= limit)
+                        goto success;
+        }
+
+#if 0
+        printk("[area] l=%lx (ENOMEM) f='%s'\n",
+               len, filp ? filp->f_dentry->d_name.name : "");
+#endif
+        return -ENOMEM;
+
+ success:
+#if 0
+        printk("[area] l=%lx ad=%lx f='%s'\n",
+               len, addr, filp ? filp->f_dentry->d_name.name : "");
+#endif
+        return addr;
+} /* end arch_get_unmapped_area() */