x86_64: move vdso

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 140 deletions

diff --git a/arch/x86_64/vdso/vma.c b/arch/x86_64/vdso/vma.c
deleted file mode 100644
index ff9333e5fb0..00000000000
--- a/arch/x86_64/vdso/vma.c
+++ /dev/null
@@ -1,140 +0,0 @@
-/*
- * Set up the VMAs to tell the VM about the vDSO.
- * Copyright 2007 Andi Kleen, SUSE Labs.
- * Subject to the GPL, v.2
- */
-#include <linux/mm.h>
-#include <linux/err.h>
-#include <linux/sched.h>
-#include <linux/init.h>
-#include <linux/random.h>
-#include <asm/vsyscall.h>
-#include <asm/vgtod.h>
-#include <asm/proto.h>
-#include "voffset.h"
-
-int vdso_enabled = 1;
-
-#define VEXTERN(x) extern typeof(__ ## x) *vdso_ ## x;
-#include "vextern.h"
-#undef VEXTERN
-
-extern char vdso_kernel_start[], vdso_start[], vdso_end[];
-extern unsigned short vdso_sync_cpuid;
-
-struct page **vdso_pages;
-
-static inline void *var_ref(void *vbase, char *var, char *name)
-{
-	unsigned offset = var - &vdso_kernel_start[0] + VDSO_TEXT_OFFSET;
-	void *p = vbase + offset;
-	if (*(void **)p != (void *)VMAGIC) {
-		printk("VDSO: variable %s broken\n", name);
-		vdso_enabled = 0;
-	}
-	return p;
-}
-
-static int __init init_vdso_vars(void)
-{
-	int npages = (vdso_end - vdso_start + PAGE_SIZE - 1) / PAGE_SIZE;
-	int i;
-	char *vbase;
-
-	vdso_pages = kmalloc(sizeof(struct page *) * npages, GFP_KERNEL);
-	if (!vdso_pages)
-		goto oom;
-	for (i = 0; i < npages; i++) {
-		struct page *p;
-		p = alloc_page(GFP_KERNEL);
-		if (!p)
-			goto oom;
-		vdso_pages[i] = p;
-		copy_page(page_address(p), vdso_start + i*PAGE_SIZE);
-	}
-
-	vbase = vmap(vdso_pages, npages, 0, PAGE_KERNEL);
-	if (!vbase)
-		goto oom;
-
-	if (memcmp(vbase, "\177ELF", 4)) {
-		printk("VDSO: I'm broken; not ELF\n");
-		vdso_enabled = 0;
-	}
-
-#define V(x) *(typeof(x) *) var_ref(vbase, (char *)RELOC_HIDE(&x, 0), #x)
-#define VEXTERN(x) \
-	V(vdso_ ## x) = &__ ## x;
-#include "vextern.h"
-#undef VEXTERN
-	return 0;
-
- oom:
-	printk("Cannot allocate vdso\n");
-	vdso_enabled = 0;
-	return -ENOMEM;
-}
-__initcall(init_vdso_vars);
-
-struct linux_binprm;
-
-/* Put the vdso above the (randomized) stack with another randomized offset.
-   This way there is no hole in the middle of address space.
-   To save memory make sure it is still in the same PTE as the stack top.
-   This doesn't give that many random bits */
-static unsigned long vdso_addr(unsigned long start, unsigned len)
-{
-	unsigned long addr, end;
-	unsigned offset;
-	end = (start + PMD_SIZE - 1) & PMD_MASK;
-	if (end >= TASK_SIZE64)
-		end = TASK_SIZE64;
-	end -= len;
-	/* This loses some more bits than a modulo, but is cheaper */
-	offset = get_random_int() & (PTRS_PER_PTE - 1);
-	addr = start + (offset << PAGE_SHIFT);
-	if (addr >= end)
-		addr = end;
-	return addr;
-}
-
-/* Setup a VMA at program startup for the vsyscall page.
-   Not called for compat tasks */
-int arch_setup_additional_pages(struct linux_binprm *bprm, int exstack)
-{
-	struct mm_struct *mm = current->mm;
-	unsigned long addr;
-	int ret;
-	unsigned len = round_up(vdso_end - vdso_start, PAGE_SIZE);
-
-	if (!vdso_enabled)
-		return 0;
-
-	down_write(&mm->mmap_sem);
-	addr = vdso_addr(mm->start_stack, len);
-	addr = get_unmapped_area(NULL, addr, len, 0, 0);
-	if (IS_ERR_VALUE(addr)) {
-		ret = addr;
-		goto up_fail;
-	}
-
-	ret = install_special_mapping(mm, addr, len,
-				      VM_READ|VM_EXEC|
-				      VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC|
-				      VM_ALWAYSDUMP,
-				      vdso_pages);
-	if (ret)
-		goto up_fail;
-
-	current->mm->context.vdso = (void *)addr;
-up_fail:
-	up_write(&mm->mmap_sem);
-	return ret;
-}
-
-static __init int vdso_setup(char *s)
-{
-	vdso_enabled = simple_strtoul(s, NULL, 0);
-	return 0;
-}
-__setup("vdso=", vdso_setup);