CVS log for src/sys/arch/mips/mips/netbsd32_machdep.c

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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>.

Sync w/ HEAD.

sync with head

fix "uname -p" on mips n32.

this has been returning "mipsn64eb" on my edgerouter4 with the
32 bit uname binary.

introduce o32, n32, and n64 versions of MACHINE_ARCH, and use
them appropriately in PROC_MACHINE_ARCH32().  now o32, n32 and
n64 "uname -p" all return different values.

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 !

Move all non-emulation-specific coredump code into the coredump module,
and remove all #ifdef COREDUMP conditional compilation.  Now, the
coredump module is completely separated from the emulation modules, and
they can all be independently loaded and unloaded.

Welcome to 9.99.18 !

Sync with HEAD

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

NFCI intended.

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

Pull up following revision(s) (requested by maxv in ticket #1677):

	sys/arch/hppa/hppa/sig_machdep.c: revision 1.26
	sys/arch/arm/arm/sig_machdep.c: revision 1.51
	sys/arch/i386/i386/machdep.c: revision 1.813
	sys/arch/alpha/alpha/machdep.c: revision 1.352
	sys/arch/m68k/m68k/sig_machdep.c: revision 1.50
	sys/arch/usermode/target/i386/cpu_i386.c: revision 1.8
	sys/arch/sparc64/sparc64/machdep.c: revision 1.289
	sys/arch/sparc64/sparc64/netbsd32_machdep.c: revision 1.111
	sys/arch/powerpc/powerpc/sig_machdep.c: revision 1.46
	sys/arch/amd64/amd64/netbsd32_machdep.c: revision 1.117
	sys/arch/sh3/sh3/sh3_machdep.c: revision 1.106
	sys/arch/mips/mips/netbsd32_machdep.c: revision 1.16
	sys/arch/mips/mips/sig_machdep.c: revision 1.24
	sys/arch/usermode/target/x86_64/cpu_x86_64.c: revision 1.7
	sys/arch/vax/vax/sig_machdep.c: revision 1.23

Fix widespread leak in the sendsig_siginfo() functions. sigframe_siginfo
has padding, so zero it out properly. While here I'm also zeroing out some
other things in several ports, for safety. Same problem in netbsd32, so
fix that too.

I can't compile-test on each architecture, but there should be no
breakage (tm).

Overall this fixes at least 14 info leaks. Prompted by the discovery by
KLEAK of a leak in amd64's sendsig_siginfo.

Pull up following revision(s) (requested by maxv in ticket #1677):

	sys/arch/hppa/hppa/sig_machdep.c: revision 1.26
	sys/arch/arm/arm/sig_machdep.c: revision 1.51
	sys/arch/i386/i386/machdep.c: revision 1.813
	sys/arch/alpha/alpha/machdep.c: revision 1.352
	sys/arch/m68k/m68k/sig_machdep.c: revision 1.50
	sys/arch/usermode/target/i386/cpu_i386.c: revision 1.8
	sys/arch/sparc64/sparc64/machdep.c: revision 1.289
	sys/arch/sparc64/sparc64/netbsd32_machdep.c: revision 1.111
	sys/arch/powerpc/powerpc/sig_machdep.c: revision 1.46
	sys/arch/amd64/amd64/netbsd32_machdep.c: revision 1.117
	sys/arch/sh3/sh3/sh3_machdep.c: revision 1.106
	sys/arch/mips/mips/netbsd32_machdep.c: revision 1.16
	sys/arch/mips/mips/sig_machdep.c: revision 1.24
	sys/arch/usermode/target/x86_64/cpu_x86_64.c: revision 1.7
	sys/arch/vax/vax/sig_machdep.c: revision 1.23

Fix widespread leak in the sendsig_siginfo() functions. sigframe_siginfo
has padding, so zero it out properly. While here I'm also zeroing out some
other things in several ports, for safety. Same problem in netbsd32, so
fix that too.

I can't compile-test on each architecture, but there should be no
breakage (tm).

Overall this fixes at least 14 info leaks. Prompted by the discovery by
KLEAK of a leak in amd64's sendsig_siginfo.

Pull up following revision(s) (requested by maxv in ticket #1677):

	sys/arch/hppa/hppa/sig_machdep.c: revision 1.26
	sys/arch/arm/arm/sig_machdep.c: revision 1.51
	sys/arch/i386/i386/machdep.c: revision 1.813
	sys/arch/alpha/alpha/machdep.c: revision 1.352
	sys/arch/m68k/m68k/sig_machdep.c: revision 1.50
	sys/arch/usermode/target/i386/cpu_i386.c: revision 1.8
	sys/arch/sparc64/sparc64/machdep.c: revision 1.289
	sys/arch/sparc64/sparc64/netbsd32_machdep.c: revision 1.111
	sys/arch/powerpc/powerpc/sig_machdep.c: revision 1.46
	sys/arch/amd64/amd64/netbsd32_machdep.c: revision 1.117
	sys/arch/sh3/sh3/sh3_machdep.c: revision 1.106
	sys/arch/mips/mips/netbsd32_machdep.c: revision 1.16
	sys/arch/mips/mips/sig_machdep.c: revision 1.24
	sys/arch/usermode/target/x86_64/cpu_x86_64.c: revision 1.7
	sys/arch/vax/vax/sig_machdep.c: revision 1.23

Fix widespread leak in the sendsig_siginfo() functions. sigframe_siginfo
has padding, so zero it out properly. While here I'm also zeroing out some
other things in several ports, for safety. Same problem in netbsd32, so
fix that too.

I can't compile-test on each architecture, but there should be no
breakage (tm).

Overall this fixes at least 14 info leaks. Prompted by the discovery by
KLEAK of a leak in amd64's sendsig_siginfo.

Pull up following revision(s) (requested by maxv in ticket #1173):
	sys/arch/hppa/hppa/sig_machdep.c: revision 1.26
	sys/arch/arm/arm/sig_machdep.c: revision 1.51
	sys/arch/i386/i386/machdep.c: revision 1.813
	sys/arch/alpha/alpha/machdep.c: revision 1.352
	sys/arch/m68k/m68k/sig_machdep.c: revision 1.50
	sys/arch/usermode/target/i386/cpu_i386.c: revision 1.8
	sys/arch/sparc64/sparc64/machdep.c: revision 1.289
	sys/arch/sparc64/sparc64/netbsd32_machdep.c: revision 1.111
	sys/arch/powerpc/powerpc/sig_machdep.c: revision 1.46
	sys/arch/amd64/amd64/netbsd32_machdep.c: revision 1.117
	sys/arch/sh3/sh3/sh3_machdep.c: revision 1.106
	sys/arch/mips/mips/netbsd32_machdep.c: revision 1.16
	sys/arch/mips/mips/sig_machdep.c: revision 1.24
	sys/arch/riscv/riscv/sig_machdep.c: revision 1.2
	sys/arch/usermode/target/x86_64/cpu_x86_64.c: revision 1.7
	sys/arch/vax/vax/sig_machdep.c: revision 1.23

Fix widespread leak in the sendsig_siginfo() functions. sigframe_siginfo
has padding, so zero it out properly. While here I'm also zeroing out some
other things in several ports, for safety. Same problem in netbsd32, so
fix that too.

I can't compile-test on each architecture, but there should be no
breakage (tm).

Overall this fixes at least 14 info leaks. Prompted by the discovery by
KLEAK of a leak in amd64's sendsig_siginfo.

Merge the [pgoyette-compat] branch

Move the netbsd32_machine32_hook into the main kernel with most of
the other hooks.

Although this hook might better belong in compat/netbsd32/ code,
there are some machines without a netbsd32 module (for example, i386
and sgimips) which still have consumers/users of this hook.  :(

Rework placement of the new netbsd32_machine32_hook

Replace weak symbol definition for machine32 with a hook.  Our in-kernel
linker doesn't handle weak symbols, so this prevented us from loading the
compat_linux32 module.

XXX There don't seem to be any other consumers of machine32 (nor does
XXX there seem to be any consumers of machine_arch32), even though it
XXX is defined for aarch64, arm32, and riscv).

Convert the MODULE_{,VOID_}HOOK_CALL macros to do everything in-line
rather than defining an intermediate hook##call function.  Almost
all of the hooks are called only once, and although we lose the
ability of doing things like

	if (MODULE_HOOK_CALL(...) == 0) ...

we simplify things quite a bit.  With this change, we no longer need
to have both declaration and definition macros, and the definition
no longer needs to have both prototype argument list and a "real"
argument list.

FWIW, the above if now needs to written as

	int ret;

	MODULE_HOOK_CALL(..., ret);
	if (ret == 0) ...

with appropriate use of braces {}.

No need to declare the hook_call() function for void hooks.  So
remove and simplify.

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

Remove the HOOK2 versions of the MODULE_HOOK macros.  There were
only a few uses, and using them led to some lack of clarity in the
code.  Instead, we now use two separate hooks, with names that
make it clear(er) what we're doing.

This also positions us to start unraveling some of the rtsock_50
mess, which will need (at least) five hooks.

Sync with HEAD, resolve a few conflicts

Fix widespread leak in the sendsig_siginfo() functions. sigframe_siginfo
has padding, so zero it out properly. While here I'm also zeroing out some
other things in several ports, for safety. Same problem in netbsd32, so
fix that too.

I can't compile-test on each architecture, but there should be no
breakage (tm).

Overall this fixes at least 14 info leaks. Prompted by the discovery by
KLEAK of a leak in amd64's sendsig_siginfo.

In MODULE_HOOK_CALL_DECL we don't need to provide the actual argument
list for calling the hook function, nor do we need to provide the
default value (for when the hook has not been set).

Make netbsd32_sendsig_sigino() non-static since we need to call it from
the _md_16 code.

While here, use __func__ in a diagnostic message rather than hardcoding
the function name.

Put netbsd32_sendsig_siginfo() here, where it belongs.

Define the netbsd32_sendsig_hook and create its accessor function.

Add a routine to actually invoke the hook for netbsd32_sendsig()

Keep only one copy of the netbsd32_compat_16 code.

Remove unnecessary #ifdef COMPAT_13 since the source file will only be
processed if COMPAT_13 is already defined.

Add glue for netbsd32 compat_13 and _16 modules

update from HEAD

Allow architectures to define a macro PROC_MACHINE_ARCH(P) and
PROC_MACHINE_ARCH32(P) to override the value for sysctl hw.machine_arch
(native and netbsd32 commpat resp.).

Use these for arm and mips instead of the (not working, noisy, in case
of arm) sysctl override and #ifdef __mips__ in architecture neutral
code.

Sync with HEAD

Sync with HEAD

Sync with HEAD

allow pcu_save() and pcu_discard() to be called on other threads,
ptrace needs to use it that way.

Sync with HEAD (as of 26th Dec)

We never exec(2) with a kernel vmspace, so do not test for that, but instead
KASSERT() that we don't.
When calculating the load address for the interpreter (e.g. ld.elf_so),
we need to take into account wether the exec'd process will run with
topdown memory or bottom up. We can not use the current vmspace's flags
to test for that, as this happens too early. Luckily the execpack already
knows what the new state will be later, so instead of testing the current
vmspace, pass the info as additional argument to struct emul
e_vm_default_addr.
Fix all such functions and adopt all callers.

Sync with HEAD

machine_arch on mips depends on the ABI so we need a routine to return
the right value.

Rebase to HEAD as of a few days ago.

sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs.  ("Protocol error: too many arguments")

sync with head

handle non-topdown binaries

Change the type of the 'cookie' that holds the state of the core dump file
from 'void *' to the actual type 'struct coredump_iostate *'.
In most of the code the contents of the structure are still unknown.
This just stops the wrong type of pointer being passed to the 'void *'
parameter.
I hope I've found everything, amd64 GENERIC and i386 GENERIC & ALL compile.

sync to latest -current.

sync with head.

Pull up following revision(s) (requested by martin in ticket #274):
	sys/arch/amd64/amd64/process_machdep.c: revision 1.20
	sys/kern/sys_lwp.c: revision 1.54
	sys/arch/sparc64/sparc64/machdep.c: revision 1.267
	sys/arch/mips/mips/cpu_subr.c: revision 1.16
	sys/arch/vax/vax/machdep.c: revision 1.188
	sys/sys/lwp.h: revision 1.161
	sys/arch/sparc64/sparc64/netbsd32_machdep.c: revision 1.98
	sys/arch/alpha/alpha/machdep.c: revision 1.339
	sys/compat/sys/ucontext.h: revision 1.6
	sys/arch/hppa/hppa/hppa_machdep.c: revision 1.28
	distrib/sets/lists/tests/mi: revision 1.469
	sys/arch/powerpc/powerpc/sig_machdep.c: revision 1.42
	tests/lib/libc/sys/t_lwp_create.c: revision 1.1
	tests/lib/libc/sys/Makefile: revision 1.23
	sys/arch/arm/arm/sig_machdep.c: revision 1.42
	sys/arch/amd64/include/mcontext.h: revision 1.15
	sys/arch/amd64/amd64/machdep.c: revision 1.183
	sys/arch/sh3/sh3/sh3_machdep.c: revision 1.99
	sys/arch/i386/i386/machdep.c: revision 1.727
	sys/compat/netbsd32/netbsd32_lwp.c: revision 1.13
	sys/arch/sparc/sparc/machdep.c: revision 1.319
	sys/arch/amd64/amd64/netbsd32_machdep.c: revision 1.76
	sys/arch/m68k/m68k/sig_machdep.c: revision 1.49
	sys/sys/ucontext.h: revision 1.16
	sys/arch/mips/mips/netbsd32_machdep.c: revision 1.9
	lib/libc/sys/_lwp_create.2: revision 1.5
Calling _lwp_create() with a bogus ucontext could trigger a kernel
assertion failure (and thus a crash in DIAGNOSTIC kernels). Independently
discovered by YAMAMOTO Takashi and Joel Sing.
To avoid this, introduce a cpu_mcontext_validate() function and move all
sanity checks from cpu_setmcontext() there. Also untangle the netbsd32
compat mess slightly and add a cpu_mcontext32_validate() cousin there.
Add an exhaustive atf test case, based partly on code from Joel Sing.
Should finally fix the remaining open part of PR kern/43903.

Calling _lwp_create() with a bogus ucontext could trigger a kernel
assertion failure (and thus a crash in DIAGNOSTIC kernels). Independently
discovered by YAMAMOTO Takashi and Joel Sing.

To avoid this, introduce a cpu_mcontext_validate() function and move all
sanity checks from cpu_setmcontext() there. Also untangle the netbsd32
compat mess slightly and add a cpu_mcontext32_validate() cousin there.

Add an exhaustive atf test case, based partly on code from Joel Sing.

Should finally fix the remaining open part of PR kern/43903.

sync with head

sync to -current.

Remove COMPAT_SA / KERN_SA.  Welcome to 6.99.3!
Approved by core@.

Sync with HEAD.

sync with head

Extend PCU:
- Add pcu_ops_t::pcu_state_release() operation for PCU_RELEASE case.
- Add pcu_switchpoint() to perform release operation on context switch.
- Sprinkle const, misc.  Also, sync MIPS with changes.

Per discussions with matt@.

Major merge to/from current.
Adds MIPS32/MIPS64 R2 support (24k, 74k, etc.) including COP0_USERLOCAL
Adds support for emulation of rdhwr $3,$29 instruction.
Major cleanup of SMP code.  (stable on multi-core / single thread per core)
llsc locking code only used in MP capable kernels.

sync with head

Sync with HEAD

Allow storing and receiving the LWP private pointer via ucontext_t
on all platforms except VAX and IA64. Add fast access via register for
AMD64, i386 and SH3 ports. Use this fast access in libpthread to replace
the stack based pthread_self(). Implement skeleton support for Alpha,
HPPA, PowerPC, SPARC and SPARC64, but leave it disabled.

Ports that support this feature provide __HAVE____LWP_GETPRIVATE_FAST in
machine/types.h and a corresponding __lwp_getprivate_fast in
machine/mcontext.h.

This material is based upon work partially supported by
The NetBSD Foundation under a contract with Joerg Sonnenberger.

Major merge forward from matt-nb5-mips64.
New fixup code.
New common SPL code.
New common interrupt code.
Move related variables into structures.
Cleanup locore (move MD variable into it).
Kill StudlyCaps
Use PCU for FPU

Retire struct user, remove sys/user.h inclusions.  Note sys/user.h header
as obsolete.  Remove USER_TO_UAREA/UAREA_TO_USER macros.

Various #include fixes and review by matt@.

No reason to set R_ZERO.

sync with head

Split FPU support into separate file and keep internals private to that file.
Make it MPSAFE.  Change interface to be very similar to what's used on other
architectures.
Add l_md.md_fpcpu to mdlwp (needed for MPSAFE)
Move pridtab from <mips/cpu.h> to <mips/locore.h>
Add initial common IPI dispatcher.
Split cpu_* routines from mips_machdep.c into cpu_subr.c
Add cpu_startup_common which has the code replicated in half-dozen
plus machdep.c files.

Merge frame into trapframe.  While this costs a bit more stack space on
kernel exceptions, the resulting simplifications are worth it.  This is
a step to fast softints and kernel preemption.

trapframe now includes a struct reg instead of a separate array of registers.

file netbsd32_machdep.c was added on branch yamt-nfs-mp on 2010-03-11 15:02:41 +0000

Get rid of l_addr references pulled in via merge.

Merge from matt-nb5-mips64
Merge mips-specific arch files.

Add COMPAT_13 support

Add COMPAT_NETBSD32 support.

file netbsd32_machdep.c was initially added on branch matt-nb5-mips64.