CVS log for src/sys/arch/amd64/amd64/netbsd32_machdep_16.c

Up to [cvs.NetBSD.org] / src / sys / arch / amd64 / amd64

Request diff between arbitrary revisions

Keyword substitution: kv
Default branch: MAIN

Remove unnecessary <sys/malloc.h>.

COMPAT_NETBSD32 is all about running the 32-bit flavor of native
binaries on a 64-bit platform[*], as such:
- Make the logic about which "sendsig" flavor to call MI (as it is in the
  native 64-bit environment) and follow the same rules as the native 32-bit
  environment.
- Make COMPAT_NETBSD32 x COMPAT_16 work the same as it would in the
  native 32-bit environment by providing a netbsd32_sendsig_sigcontext_16_hook,
  rather than overriding the entire sendsig logic with a netbsd32_sendsig_hook.
- In netbsd32___sigaction_sigtramp(), make sure the compat_netbsd32_16
  module is loaded if the trampoline version specifies a sigcontext style
  handler, otherwise return EINVAL so that libc can try again with siginfo
  style.

[*] ...except for arm32, which uses it to mean "run 32-bit OABI binaries
from the 32-bit EABI environment".  Doing it this way was arguably a mistake,
but we are stuck with it for now, so support it by providing a machine-
dependent override for netbsd32_sendsig() that also disables the corresponding
logic in netbsd32___sigaction_sigtramp().

Fixes PR kern/56487.

Use the signal trampoline version constants from <sys/signal.h>.

Mostly merge changes from HEAD upto 20200411

Merge changes from current as of 20200406

Rather than keeping a separate mutex, condvar, and pserialize for each
module hook, we can share a common set of synchronization structures.
This cuts the amount of cacheline_aligned data for these structures by
50%.

Note that we still have a per-hook localcount, since we need to count
individual references.

As discussed with riastradh@

Welcome to 9.99.22 !

Clean-up unnecessary inclusions of opt_coredump.h

Sync with HEAD

file netbsd32_machdep_16.c was added on branch phil-wifi on 2019-06-10 22:05:47 +0000

Rename the MODULE_*_HOOK() macros to MODULE_HOOK_*() as briefly
discussed on irc.

NFCI intended.

Ride the earlier kernel bump - it;s getting crowded.

Merge the [pgoyette-compat] branch

Convert the macros for setting and unsetting a hook to generate
in-line code rather than using an intermediary hook##set routine.
Hooks are set and unset only in one place, so the intermediary
routine provides no benefit.  IMHO using the macro at the point-
of-call is more readable than using it elsewhere in the code and
then calling the generated intermediary routine (for which you
won't even find its declaration or definition unless you remember
to search for the HOOK_SET macro instead).

NFC intended, will verify with a bulk build and an atf test run.

Create a variant of the HOOK macros that handles hook routines of
type void, and use them where appropriate.

Sync with HEAD, resolve a few conflicts

Allocate the netbsd32_sendsig_hook in the main compat_netbsd32 code
(where it call be called) and not in a subsidiary module which may
not even exist.

Wrap long line, KNF

In the xxx_fini() routine we need to _un_set the hook!

Make the replacement/hook function return an int, to match the
expectations of the MP-safe HOOK mechanism.

And use proper macro names

If we're going to use the MP-safe HOOK macros, it helps to define them
by including the proper header!

Convert yet another function pointer to the MP-safe mechanism

OMG it builds!

Finish rearranging the amd64 MD compat_netbsd32 code.

XXX Other architectures will be dealt with later.

Work in progress - get the arch-specific netbsd32_machdep.c code to
build as a module.

XXX Doesn't work when the code is built-in to the kernel.

file netbsd32_machdep_16.c was initially added on branch pgoyette-compat.