tree 40cc5983128f415529fa477fc561a54095069ea1
parent b19fe0220af3411a4eff9bb0693d7f42c714acc7
author Sam Leffler <sleffler@google.com> 1733350615 -0800
committer Sam Leffler <sleffler@google.com> 1733767766 -0800

elfloader: band-aid handling of PHDRs that span flash pages

- inspect the PHDR p_type field without copying the entire header
  when checking if a PHDR is loadable (we assume the PHDR is
  word-aligned which is probably ok)
- advance to a new flash page--as needed--when reading a PHDR
- add an assert with an informative message when checking for a
  PHDR that spans flash pages; previously this would trigger an
  obscure assert when constructing the slice of raw bytes
- add Elf32Phdr::get_type() to return just the p_type field of a PHDR
- change Elf32Phdr::from_bytes() to take an immutable ref

This hacks around problems where the latest CHERIoT lld appends PHDRs
that require multiple flash pages but are not loaded. A better fix would
assemble PHDR's that span flash pages.

Change-Id: I1cfdc93ecb79fa7008bdfcab8a9210fbaaf89baf