The patch titled
Add VM_ALWAYSDUMP
has been added to the -mm tree. Its filename is
add-vm_alwaysdump.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: Add VM_ALWAYSDUMP
From: Roland McGrath <roland@xxxxxxxxxx>
This patch adds the VM_ALWAYSDUMP flag for vm_flags in vm_area_struct. This
provides a clean explicit way to have a vma always included in core dumps, as
is needed for vDSO's.
Signed-off-by: Roland McGrath <roland@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
fs/binfmt_elf.c | 4 ++++
include/linux/mm.h | 1 +
2 files changed, 5 insertions(+)
diff -puN fs/binfmt_elf.c~add-vm_alwaysdump fs/binfmt_elf.c
--- a/fs/binfmt_elf.c~add-vm_alwaysdump
+++ a/fs/binfmt_elf.c
@@ -1178,6 +1178,10 @@ static int dump_seek(struct file *file,
*/
static int maydump(struct vm_area_struct *vma)
{
+ /* The vma can be set up to tell us the answer directly. */
+ if (vma->vm_flags & VM_ALWAYSDUMP)
+ return 1;
+
/* Do not dump I/O mapped devices or special mappings */
if (vma->vm_flags & (VM_IO | VM_RESERVED))
return 0;
diff -puN include/linux/mm.h~add-vm_alwaysdump include/linux/mm.h
--- a/include/linux/mm.h~add-vm_alwaysdump
+++ a/include/linux/mm.h
@@ -168,6 +168,7 @@ extern unsigned int kobjsize(const void
#define VM_NONLINEAR 0x00800000 /* Is non-linear (remap_file_pages) */
#define VM_MAPPED_COPY 0x01000000 /* T if mapped copy of data (nommu mmap) */
#define VM_INSERTPAGE 0x02000000 /* The vma has had "vm_insert_page()" done on it */
+#define VM_ALWAYSDUMP 0x04000000 /* Always include in core dumps */
#ifndef VM_STACK_DEFAULT_FLAGS /* arch can override this */
#define VM_STACK_DEFAULT_FLAGS VM_DATA_DEFAULT_FLAGS
_
Patches currently in -mm which might be from roland@xxxxxxxxxx are
fix-config_compat_vdso.patch
fix-gate_vmavm_flags.patch
add-vm_alwaysdump.patch
i386-vdso-use-vm_alwaysdump.patch
i386-vdso-use-vm_alwaysdump-tidy.patch
x86_64-ia32-vdso-use-vm_alwaysdump.patch
powerpc-vdso-use-vm_alwaysdump.patch
x86_64-ia32-vdso-define-arch_vma_name.patch
transform-kmem_cache_allocmemset0-kmem_cache_zalloc.patch
clone-flag-clone_parent_tidptr-leaves-invalid-results-in-memory.patch
add-install_special_mapping.patch
i386-vdso-use-install_special_mapping.patch
x86_64-ia32-vdso-use-install_special_mapping.patch
powerpc-vdso-use-install_special_mapping.patch
-
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