From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@ppc970.osdl.org>
Date: Sat, 16 Apr 2005 15:20:36 -0700
Subject: Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
---
 arch/frv/mm/elf-fdpic.c | 123 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 123 insertions(+)
 create mode 100644 arch/frv/mm/elf-fdpic.c

(limited to 'arch/frv/mm/elf-fdpic.c')

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() */
-- 
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