If we want to execve files directly we need to ensure that the
binfmt_misc interpreter path is installed.
If it isn't installed then we need to fall down the regular path of
pushing FEX to the front of the argument list.
For the ones that should be IGNORE we can safely ignore them at that
point.
For the ones that have a default behaviour of crashing, just go ahead
and crash.
This was having the fun problem space that if we received an ignore
event, we would remove the fault handler then if the guest registered a
handler it would have never been called.
SIGWINCH specifically is one that defaults to ignore and we need to care
about. If SIGWICH happened before the guest registered a handler then it
would never receive the signal.
The ones that their default behaviour is faulting are fine to uninstall
and then immediately crash, since it is a real crash at that point.
Instead of having the configuration being loaded and stored in to a
frontend system. First moves the backing store of the configuration in
to FEXCore.
Each layer that is constructed then loads its particular configuration.
After the layers are loaded, then a meta layer is constructed that
merges the layers flat.
This means we will no longer hit the problem where a configuration is
stored in the "main" configuration file, then environment and arguments
passed manage to overwrite it.
The order of the layers going from inner most layer to outer most, with
outermost overwriting previous layer configurations is as follows:
Main < Global application < Local application < Arguments < Environment
One step that needs to be changed in the future is that FEXCore can then
just load its configuration from the layers directly since the data is
in FEXCore now. This will be reserved for a future change so we are less
disruptive.
fstatfs64 and statfs64 was wrong, the syscall doesn't quite match the
glibc definition
Fixes recvmsg. Specifically the aux data was failing, thus SCM_RIGHTS
wasn't getting passed correctly.
Fixes a couple of time syscalls where their arguments are optional.
This was causing issues in 32bit xeyes.
A couple of the multiply ops were still using 8bit and 16bit multiply
while the other one was already sexting or zexting the source.
This implements a bunch of new 32bit syscalls which almost gets FEX to
be able to run Steam.
The main missing syscalls are mremap, shmat, and ioctl for supporting
Steam execution.
RA Pass and passmanager compaction pass don't need to be independent.
This saves some memory.
In the future we should allow passes to fetch passes by name, that will
be part of the PassManager improvement in the future
