powerpc/kexec_file: Prepare elfcore header for crashing kernel

Browse source

Prepare elf headers for the crashing kernel's core file using
crash_prepare_elf64_headers() and pass on this info to kdump kernel by
updating its command line with elfcorehdr parameter. Also, add
elfcorehdr location to reserve map to avoid it from being stomped on
while booting.

Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Tested-by: Pingfan Liu <piliu@redhat.com>
Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
[mpe: Ensure cmdline is nul terminated]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/159602298855.575379.15819225623219909517.stgit@hbathini

...

This commit is contained in:

Hari Bathini 2020-07-29 17:13:14 +05:30 • committed by Michael Ellerman

parent 1a1cf93c20

commit cb350c1f1f

4 changed files with 234 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

6

arch/powerpc/include/asm/kexec.h

View file

12

arch/powerpc/kexec/elf_64.c

View file

51

arch/powerpc/kexec/file_load.c

View file

165

arch/powerpc/kexec/file_load_64.c

View file