From: Luke Shumaker <[email protected]>
The goal of this patchset is to fix
https://bugs.launchpad.net/qemu/+bug/1740219
The gist is that the current linear search for an acceptable address
range is a bad strategy when the reason we didn't get a good address
on the first try is that we've having problems mapping the commpage
for the 32-bit ARM target; especially if ASLR is disabled.
I think that only the final patch in this patchset is actually
necessary to fix the issue; but I didn't feel comfortable writing it
without also makeing the preceding (small) changes.
Luke Shumaker (10):
linux-user: Use #if to only call validate_guest_space for 32-bit ARM
target
linux-user: Rename validate_guest_space => init_guest_commpage
linux-user: init_guest_space: Clean up if we can't initialize the
commpage
linux-user: init_guest_space: Correctly handle guest_start in commpage
initialization
linux-user: init_guest_space: Clarify page alignment logic
linux-user: init_guest_commpage: Add a comment about size check
linux-user: init_guest_space: Clean up control flow a bit
linux-user: init_guest_space: Don't try to align if we'll reject it
linux-user: init_guest_space: Add a comment about search strategy
linux-user: init_guest_space: Try to make ARM space+commpage
continuous
linux-user/elfload.c | 145 ++++++++++++++++++++++++++++++++++++++++-----------
1 file changed, 114 insertions(+), 31 deletions(-)
--
2.15.1
Happy hacking,
~ Luke Shumaker
