Messages in this thread Patch in this message | | | Date | Mon, 5 Jan 2009 15:39:07 -0800 | Subject | [PATCH]Fix: 32bit binary has 64bit address of stack vma | From | Ying Han <> |
| |
From: Ying Han <yinghan@google.com>
Fix 32bit binary get 64bit stack vma offset.
32bit binary running on 64bit system, the /proc/pid/maps shows for the vma represents stack get a 64bit adress: ff96c000-ff981000 rwxp 7ffffffea000 00:00 0 [stack]
Signed-off-by: Ying Han <yinghan@google.com>
fs/exec.c | 5 +-
diff --git a/fs/exec.c b/fs/exec.c index 4e834f1..8c3eff4 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -517,6 +517,7 @@ static int shift_arg_pages(struct vm_area_struct *vma, uns unsigned long length = old_end - old_start; unsigned long new_start = old_start - shift; unsigned long new_end = old_end - shift; + unsigned long new_pgoff = new_start >> PAGE_SHIFT; struct mmu_gather *tlb;
BUG_ON(new_start > new_end); @@ -531,7 +532,7 @@ static int shift_arg_pages(struct vm_area_struct *vma, uns /* * cover the whole range: [new_start, old_end) */ - vma_adjust(vma, new_start, old_end, vma->vm_pgoff, NULL); + vma_adjust(vma, new_start, old_end, new_pgoff, NULL);
/* * move the page tables downwards, on failure we rely on @@ -564,7 +565,7 @@ static int shift_arg_pages(struct vm_area_struct *vma, uns /* * shrink the vma to just the new range. */ - vma_adjust(vma, new_start, new_end, vma->vm_pgoff, NULL); + vma_adjust(vma, new_start, new_end, new_pgoff, NULL);
return 0; }
| |