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CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS: Write ELF core dumps with partial segments

General informations

The Linux kernel configuration item CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS:

Help text

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.rst for details.

This config option changes the default setting of coredump_filter seen at boot time. If unsure, say Y.



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