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Subject[PATCH v2 13/20] kexec, elf: introduce NT_VMCORE_DEBUGINFO note type
Date
This patch introduces NT_VMCORE_DEBUGINFO to a unique note type in
VMCOREINFO name, which has had no name so far. The name means that
it's a kind of note type in vmcoreinfo that contains system kernel's
debug information.

Signed-off-by: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com>
---

include/uapi/linux/elf.h | 4 ++++
kernel/kexec.c | 4 ++--
2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/include/uapi/linux/elf.h b/include/uapi/linux/elf.h
index 8072d35..b869904 100644
--- a/include/uapi/linux/elf.h
+++ b/include/uapi/linux/elf.h
@@ -398,6 +398,10 @@ typedef struct elf64_shdr {
#define NT_METAG_CBUF 0x500 /* Metag catch buffer registers */
#define NT_METAG_RPIPE 0x501 /* Metag read pipeline state */

+/*
+ * Notes exported from /proc/vmcore, belonging to "VMCOREINFO" name.
+ */
+#define NT_VMCORE_DEBUGINFO 0 /* vmcore system kernel's debuginfo */

/* Note header in a PT_NOTE section */
typedef struct elf32_note {
diff --git a/kernel/kexec.c b/kernel/kexec.c
index 195de6d..6597b82 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -1438,8 +1438,8 @@ static void update_vmcoreinfo_note(void)

if (!vmcoreinfo_size)
return;
- buf = append_elf_note(buf, VMCOREINFO_NOTE_NAME, 0, vmcoreinfo_data,
- vmcoreinfo_size);
+ buf = append_elf_note(buf, VMCOREINFO_NOTE_NAME, NT_VMCORE_DEBUGINFO,
+ vmcoreinfo_data, vmcoreinfo_size);
final_note(buf);
}



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