[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/arch/frv/mm/elf-fdpic.c b/src/kernel/linux/v4.14/arch/frv/mm/elf-fdpic.c
new file mode 100644
index 0000000..46aa289
--- /dev/null
+++ b/src/kernel/linux/v4.14/arch/frv/mm/elf-fdpic.c
@@ -0,0 +1,114 @@
+/* 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/sched/mm.h>
+#include <linux/mm.h>
+#include <linux/fs.h>
+#include <linux/elf-fdpic.h>
+#include <asm/mman.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;
+ struct vm_unmapped_area_info info;
+
+ if (len > TASK_SIZE)
+ return -ENOMEM;
+
+ /* handle MAP_FIXED */
+ if (flags & MAP_FIXED)
+ return addr;
+
+ /* 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 <= vm_start_gap(vma)))
+ goto success;
+ }
+
+ /* search between the bottom of user VM and the stack grow area */
+ info.flags = 0;
+ info.length = len;
+ info.low_limit = PAGE_SIZE;
+ info.high_limit = (current->mm->start_stack - 0x00200000);
+ info.align_mask = 0;
+ info.align_offset = 0;
+ addr = vm_unmapped_area(&info);
+ if (!(addr & ~PAGE_MASK))
+ goto success;
+ VM_BUG_ON(addr != -ENOMEM);
+
+ /* search from just above the WorkRAM area to the top of memory */
+ info.low_limit = PAGE_ALIGN(0x80000000);
+ info.high_limit = TASK_SIZE;
+ addr = vm_unmapped_area(&info);
+ if (!(addr & ~PAGE_MASK))
+ goto success;
+ VM_BUG_ON(addr != -ENOMEM);
+
+#if 0
+ printk("[area] l=%lx (ENOMEM) f='%s'\n",
+ len, filp ? filp->f_path.dentry->d_name.name : "");
+#endif
+ return -ENOMEM;
+
+ success:
+#if 0
+ printk("[area] l=%lx ad=%lx f='%s'\n",
+ len, addr, filp ? filp->f_path.dentry->d_name.name : "");
+#endif
+ return addr;
+} /* end arch_get_unmapped_area() */