From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/arch/frv/mm/elf-fdpic.c | 113 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 113 insertions(+) create mode 100644 kernel/arch/frv/mm/elf-fdpic.c (limited to 'kernel/arch/frv/mm/elf-fdpic.c') diff --git a/kernel/arch/frv/mm/elf-fdpic.c b/kernel/arch/frv/mm/elf-fdpic.c new file mode 100644 index 000000000..836f14707 --- /dev/null +++ b/kernel/arch/frv/mm/elf-fdpic.c @@ -0,0 +1,113 @@ +/* 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 +#include +#include +#include +#include + +/*****************************************************************************/ +/* + * 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 <= vma->vm_start)) + 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() */ -- cgit 1.2.3-korg