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proc/kcore: add vmcoreinfo note to /proc/kcore

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The vmcoreinfo information is useful for runtime debugging tools, not just
for crash dumps.  A lot of this information can be determined by other
means, but this is much more convenient, and it only adds a page at most
to the file.

Link: http://lkml.kernel.org/r/fddbcd08eed76344863303878b12de1c1e2a04b6.1531953780.git.osandov@fb.com
Signed-off-by: Omar Sandoval <osandov@fb.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Bhupesh Sharma <bhsharma@redhat.com>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: James Morse <james.morse@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Omar Sandoval
2018-08-21 21:55:20 -07:00
committed by Linus Torvalds
parent eff4345e7f
commit 23c85094fe
4 changed files with 21 additions and 4 deletions
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4
kernel/crash_core.c
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@@ -14,8 +14,8 @@
#include <asm/sections.h>
/* vmcoreinfo stuff */
static unsigned char *vmcoreinfo_data;
static size_t vmcoreinfo_size;
unsigned char *vmcoreinfo_data;
size_t vmcoreinfo_size;
u32 *vmcoreinfo_note;
/* trusted vmcoreinfo, e.g. we can make a copy in the crash memory */