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Diffstat (limited to 'ANDROID_3.4.5/arch/hexagon/kernel/vdso.c')
-rw-r--r--ANDROID_3.4.5/arch/hexagon/kernel/vdso.c100
1 files changed, 0 insertions, 100 deletions
diff --git a/ANDROID_3.4.5/arch/hexagon/kernel/vdso.c b/ANDROID_3.4.5/arch/hexagon/kernel/vdso.c
deleted file mode 100644
index 5d39f42f..00000000
--- a/ANDROID_3.4.5/arch/hexagon/kernel/vdso.c
+++ /dev/null
@@ -1,100 +0,0 @@
-/*
- * vDSO implementation for Hexagon
- *
- * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- */
-
-#include <linux/err.h>
-#include <linux/mm.h>
-#include <linux/vmalloc.h>
-#include <linux/binfmts.h>
-
-#include <asm/vdso.h>
-
-static struct page *vdso_page;
-
-/* Create a vDSO page holding the signal trampoline.
- * We want this for a non-executable stack.
- */
-static int __init vdso_init(void)
-{
- struct hexagon_vdso *vdso;
-
- vdso_page = alloc_page(GFP_KERNEL);
- if (!vdso_page)
- panic("Cannot allocate vdso");
-
- vdso = vmap(&vdso_page, 1, 0, PAGE_KERNEL);
- if (!vdso)
- panic("Cannot map vdso");
- clear_page(vdso);
-
- /* Install the signal trampoline; currently looks like this:
- * r6 = #__NR_rt_sigreturn;
- * trap0(#1);
- */
- vdso->rt_signal_trampoline[0] = __rt_sigtramp_template[0];
- vdso->rt_signal_trampoline[1] = __rt_sigtramp_template[1];
-
- vunmap(vdso);
-
- return 0;
-}
-arch_initcall(vdso_init);
-
-/*
- * Called from binfmt_elf. Create a VMA for the vDSO page.
- */
-int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
-{
- int ret;
- unsigned long vdso_base;
- struct mm_struct *mm = current->mm;
-
- down_write(&mm->mmap_sem);
-
- /* Try to get it loaded right near ld.so/glibc. */
- vdso_base = STACK_TOP;
-
- vdso_base = get_unmapped_area(NULL, vdso_base, PAGE_SIZE, 0, 0);
- if (IS_ERR_VALUE(vdso_base)) {
- ret = vdso_base;
- goto up_fail;
- }
-
- /* MAYWRITE to allow gdb to COW and set breakpoints. */
- ret = install_special_mapping(mm, vdso_base, PAGE_SIZE,
- VM_READ|VM_EXEC|
- VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC,
- &vdso_page);
-
- if (ret)
- goto up_fail;
-
- mm->context.vdso = (void *)vdso_base;
-
-up_fail:
- up_write(&mm->mmap_sem);
- return ret;
-}
-
-const char *arch_vma_name(struct vm_area_struct *vma)
-{
- if (vma->vm_mm && vma->vm_start == (long)vma->vm_mm->context.vdso)
- return "[vdso]";
- return NULL;
-}