diff options
| -rw-r--r-- | arch/alpha/include/asm/mman.h | 4 | ||||
| -rw-r--r-- | arch/mips/include/asm/mman.h | 4 | ||||
| -rw-r--r-- | arch/parisc/include/asm/mman.h | 4 | ||||
| -rw-r--r-- | arch/xtensa/include/asm/mman.h | 4 | ||||
| -rw-r--r-- | fs/binfmt_elf.c | 3 | ||||
| -rw-r--r-- | include/asm-generic/mman-common.h | 4 | ||||
| -rw-r--r-- | include/linux/mm.h | 1 | ||||
| -rw-r--r-- | mm/madvise.c | 8 |
8 files changed, 32 insertions, 0 deletions
diff --git a/arch/alpha/include/asm/mman.h b/arch/alpha/include/asm/mman.h index 72db984..cbeb361 100644 --- a/arch/alpha/include/asm/mman.h +++ b/arch/alpha/include/asm/mman.h @@ -56,6 +56,10 @@ #define MADV_HUGEPAGE 14 /* Worth backing with hugepages */ #define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */ +#define MADV_DONTDUMP 16 /* Explicity exclude from the core dump, + overrides the coredump filter bits */ +#define MADV_DODUMP 17 /* Clear the MADV_NODUMP flag */ + /* compatibility flags */ #define MAP_FILE 0 diff --git a/arch/mips/include/asm/mman.h b/arch/mips/include/asm/mman.h index 785b4ea..46d3da0 100644 --- a/arch/mips/include/asm/mman.h +++ b/arch/mips/include/asm/mman.h @@ -80,6 +80,10 @@ #define MADV_HUGEPAGE 14 /* Worth backing with hugepages */ #define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */ +#define MADV_DONTDUMP 16 /* Explicity exclude from the core dump, + overrides the coredump filter bits */ +#define MADV_DODUMP 17 /* Clear the MADV_NODUMP flag */ + /* compatibility flags */ #define MAP_FILE 0 diff --git a/arch/parisc/include/asm/mman.h b/arch/parisc/include/asm/mman.h index f5b7bf5..12219eb 100644 --- a/arch/parisc/include/asm/mman.h +++ b/arch/parisc/include/asm/mman.h @@ -62,6 +62,10 @@ #define MADV_HUGEPAGE 67 /* Worth backing with hugepages */ #define MADV_NOHUGEPAGE 68 /* Not worth backing with hugepages */ +#define MADV_DONTDUMP 69 /* Explicity exclude from the core dump, + overrides the coredump filter bits */ +#define MADV_DODUMP 70 /* Clear the MADV_NODUMP flag */ + /* compatibility flags */ #define MAP_FILE 0 #define MAP_VARIABLE 0 diff --git a/arch/xtensa/include/asm/mman.h b/arch/xtensa/include/asm/mman.h index 3078901..25bc6c1 100644 --- a/arch/xtensa/include/asm/mman.h +++ b/arch/xtensa/include/asm/mman.h @@ -86,6 +86,10 @@ #define MADV_HUGEPAGE 14 /* Worth backing with hugepages */ #define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */ +#define MADV_DONTDUMP 16 /* Explicity exclude from the core dump, + overrides the coredump filter bits */ +#define MADV_DODUMP 17 /* Clear the MADV_NODUMP flag */ + /* compatibility flags */ #define MAP_FILE 0 diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index b64be5b..504b6eee 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -1127,6 +1127,9 @@ static unsigned long vma_dump_size(struct vm_area_struct *vma, if (always_dump_vma(vma)) goto whole; + if (vma->vm_flags & VM_NODUMP) + return 0; + /* Hugetlb memory check */ if (vma->vm_flags & VM_HUGETLB) { if ((vma->vm_flags & VM_SHARED) && FILTER(HUGETLB_SHARED)) diff --git a/include/asm-generic/mman-common.h b/include/asm-generic/mman-common.h index 787abbb..d030d2c 100644 --- a/include/asm-generic/mman-common.h +++ b/include/asm-generic/mman-common.h @@ -48,6 +48,10 @@ #define MADV_HUGEPAGE 14 /* Worth backing with hugepages */ #define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */ +#define MADV_DONTDUMP 16 /* Explicity exclude from the core dump, + overrides the coredump filter bits */ +#define MADV_DODUMP 17 /* Clear the MADV_NODUMP flag */ + /* compatibility flags */ #define MAP_FILE 0 diff --git a/include/linux/mm.h b/include/linux/mm.h index 2de2ddb..a6fabdf 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -111,6 +111,7 @@ extern unsigned int kobjsize(const void *objp); #define VM_HUGEPAGE 0x01000000 /* MADV_HUGEPAGE marked this vma */ #endif #define VM_INSERTPAGE 0x02000000 /* The vma has had "vm_insert_page()" done on it */ +#define VM_NODUMP 0x04000000 /* Do not include in the core dump */ #define VM_CAN_NONLINEAR 0x08000000 /* Has ->fault & does nonlinear pages */ #define VM_MIXEDMAP 0x10000000 /* Can contain "struct page" and pure PFN pages */ diff --git a/mm/madvise.c b/mm/madvise.c index f5ab745..1ccbba5 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -65,6 +65,12 @@ static long madvise_behavior(struct vm_area_struct * vma, } new_flags &= ~VM_DONTCOPY; break; + case MADV_DONTDUMP: + new_flags |= VM_NODUMP; + break; + case MADV_DODUMP: + new_flags &= ~VM_NODUMP; + break; case MADV_MERGEABLE: case MADV_UNMERGEABLE: error = ksm_madvise(vma, start, end, behavior, &new_flags); @@ -293,6 +299,8 @@ madvise_behavior_valid(int behavior) case MADV_HUGEPAGE: case MADV_NOHUGEPAGE: #endif + case MADV_DONTDUMP: + case MADV_DODUMP: return 1; default: |
