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-rw-r--r--fs/Kconfig.binfmt22
-rw-r--r--include/linux/sched.h8
2 files changed, 29 insertions, 1 deletions
diff --git a/fs/Kconfig.binfmt b/fs/Kconfig.binfmt
index 801db1341811..ce9fb3fbfae4 100644
--- a/fs/Kconfig.binfmt
+++ b/fs/Kconfig.binfmt
@@ -40,6 +40,28 @@ config BINFMT_ELF_FDPIC
It is also possible to run FDPIC ELF binaries on MMU linux also.
+config CORE_DUMP_DEFAULT_ELF_HEADERS
+ bool "Write ELF core dumps with partial segments"
+ default n
+ depends on BINFMT_ELF
+ help
+ ELF core dump files describe each memory mapping of the crashed
+ process, and can contain or omit the memory contents of each one.
+ The contents of an unmodified text mapping are omitted by default.
+
+ For an unmodified text mapping of an ELF object, including just
+ the first page of the file in a core dump makes it possible to
+ identify the build ID bits in the file, without paying the i/o
+ cost and disk space to dump all the text. However, versions of
+ GDB before 6.7 are confused by ELF core dump files in this format.
+
+ The core dump behavior can be controlled per process using
+ the /proc/PID/coredump_filter pseudo-file; this setting is
+ inherited. See Documentation/filesystems/proc.txt for details.
+
+ This config option changes the default setting of coredump_filter
+ seen at boot time. If unsure, say N.
+
config BINFMT_FLAT
bool "Kernel support for flat binaries"
depends on !MMU && (!FRV || BROKEN)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 017cc914ef1f..f52dbd3587a7 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -411,7 +411,13 @@ extern int get_dumpable(struct mm_struct *mm);
(((1 << MMF_DUMP_FILTER_BITS) - 1) << MMF_DUMP_FILTER_SHIFT)
#define MMF_DUMP_FILTER_DEFAULT \
((1 << MMF_DUMP_ANON_PRIVATE) | (1 << MMF_DUMP_ANON_SHARED) |\
- (1 << MMF_DUMP_HUGETLB_PRIVATE))
+ (1 << MMF_DUMP_HUGETLB_PRIVATE) | MMF_DUMP_MASK_DEFAULT_ELF)
+
+#ifdef CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS
+# define MMF_DUMP_MASK_DEFAULT_ELF (1 << MMF_DUMP_ELF_HEADERS)
+#else
+# define MMF_DUMP_MASK_DEFAULT_ELF 0
+#endif
struct sighand_struct {
atomic_t count;