[PATCH v1 0/3] some linux-user guest_base fixes

[Alex Bennée]

Hi,

Here are a couple of patches to clean-up guest_base handling for
linux-user guests. There are two cases we hadn't accounted for/tested
enough in the original clean-up:

  - chroots without /proc access
  - 32 bit hosts and the 32 bit ARM COMMPAGE

The solution to the first problem is a simple fall-back to mmap
probing but without the ugliness of the first approach.

The second is a bit of a hack but works. Given we only ever expose one
value from the COMMPAGE it does make me wonder if we could rip out the
special casing and come up with a cleaner ARM only approach by hooking
exceptions? Anyway I've included a test case for the COMMPAGE as well.

Please review

Alex Bennée (3):
  linux-user: provide fallback pgd_find_hole for bare chroots
  linux-user: deal with address wrap for ARM_COMMPAGE on 32 bit
  tests/tcg: add simple commpage test case

 linux-user/elfload.c          | 66 ++++++++++++++++++++++++++++++-----
 tests/tcg/arm/commpage.c      | 61 ++++++++++++++++++++++++++++++++
 tests/tcg/arm/Makefile.target |  2 ++
 3 files changed, 121 insertions(+), 8 deletions(-)
 create mode 100644 tests/tcg/arm/commpage.c

-- 
2.20.1