Messages in this thread Patch in this message | | | From | Roland McGrath <> | Subject | [PATCH 3/11] Add VM_ALWAYSDUMP | Date | Sat, 13 Jan 2007 21:33:50 -0800 (PST) |
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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@redhat.com> --- fs/binfmt_elf.c | 4 ++++ include/linux/mm.h | 1 + 2 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index 7cb2872..6fec8bf 100644 --- a/fs/binfmt_elf.c +++ b/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 --git a/include/linux/mm.h b/include/linux/mm.h index 7691223..2d2c08d 100644 --- a/include/linux/mm.h +++ b/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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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