kexec/elf: assign one to align if sh_addralign equals zero

According to ELF specification, if sh_addralign equals zero or one, then
the section has no alignment requirement on the start address. (I.e. it
can be aligned on 1 byte)

Since modern cpu asks the .text, .data, .bss to be aligned
on the machine word boundary at least, so in elf_rel_load(),
sh_addralign can not be zero, and
  align = shdr->sh_addralign;
  ...
  bufsz = _ALIGN(bufsz, align);

will not render a result of 'bufsz = 0'.

But it had better have a check on the case of 'sh_addralign == 0'
regardless of the assumption of machine word alignment.

This patch has no functional change.

Signed-off-by: Pingfan Liu <piliu@redhat.com>
Signed-off-by: Simon Horman <horms@verge.net.au>

0 files changed, 0 insertions, 0 deletions