Commit Graph

12778 Commits

Author SHA1 Message Date
Konstantin Belousov
c48c590f63 Remove duplicate and useless declarations.
Submitted by:	bde
2015-07-22 09:12:40 +00:00
John Baldwin
9a2d6ab990 Various changes to the registers displayed in DDB for x86.
- Fix segment registers to only display the low 16 bits.
- Remove unused handlers and entries for the debug registers.
- Display xcr0 (if valid) in 'show sysregs'.
- Add '0x' prefix to MSR values to match other values in 'show sysregs'.
- MFamd64: Display various MSRs in 'show sysregs'.
- Add a 'show dbregs' to display the value of debug registers.
- Dynamically size the column width for register values to properly
  align columns on 64-bit platforms.
- Display %gs for i386 in 'show registers'.

Differential Revision:	https://reviews.freebsd.org/D2784
Reviewed by:	kib, markj
MFC after:	2 weeks
2015-07-22 01:09:02 +00:00
Mark Johnston
a5cbf8b9c0 Let the unwinder handle faults during function prologues or epilogues.
The i386 and amd64 DDB stack unwinders contain code to detect and handle
the case where the first frame is not completely set up or torn down. This
code was accidentally unused however, since db_backtrace() was never called
with a non-NULL trap frame. This change fixes that.

Also remove get_rsp() from the amd64 code. It appears to have come from
i386, which needs to take into account whether the exception triggered a
CPL switch, since SS:ESP is only pushed onto the stack if so. On amd64,
SS:RSP is pushed regardless, so get_rsp() was doing the wrong thing for
kernel-mode exceptions. As a result, we can also remove custom print
functions for these registers.

Reviewed by:	jhb
Sponsored by:	EMC / Isilon Storage Division
Differential Revision:	https://reviews.freebsd.org/D2881
2015-07-21 23:22:23 +00:00
Mark Johnston
f8a757d016 Improve stack unwinding on i386 and amd64 after an IP fault.
If we can't find a symbol corresponding to the faulting instruction, assume
that the previously-executed function is a call and attempt to find the
calling function using the return address on the stack. Otherwise we end
up associating the last stack frame with the current call, which is
incorrect and causes the unwinder to skip printing of the calling function,
resulting in a confusing backtrace.

Reviewed by:	jhb
Sponsored by:	EMC / Isilon Storage Division
Differential Revision:	https://reviews.freebsd.org/D2859
2015-07-21 23:13:11 +00:00
Mark Johnston
32cd0147fa Implement the lockstat provider using SDT(9) instead of the custom provider
in lockstat.ko. This means that lockstat probes now have typed arguments and
will utilize SDT probe hot-patching support when it arrives.

Reviewed by:	gnn
Differential Revision:	https://reviews.freebsd.org/D2993
2015-07-19 22:14:09 +00:00
Konstantin Belousov
a8e1bc2e14 Revert bit of the r285627, locore.s does not need include of
opt_kstack_pages.h.  The asm gets the right KSTACK_PAGES from the
assym.s.

Reported by:	bz
Sponsored by:	The FreeBSD Foundation
2015-07-19 10:45:58 +00:00
Benno Rice
eacbeb2b95 Merge driver for PMC Sierra's range of SAS/SATA HBAs.
Submitted by:	Achim Leubner <Achim.Leubner@pmcs.com>
Reviewed by:	scottl
2015-07-17 23:30:43 +00:00
Konstantin Belousov
888e282ab4 When checking for the valid value of the frame pointer, verify that it
belongs to the kernel stack address range for the thread.  Right now,
code checks that new frame is not farther then KSTACK_PAGES pages from
the current frame, which allows the address to point past the top of
the stack.

Reviewed by:	andrew, emaste, markj
Differential revision:	https://reviews.freebsd.org/D3108
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
2015-07-16 19:40:18 +00:00
Zbigniew Bodek
721555e7ee Fix KSTACK_PAGES issue when the default value was changed in KERNCONF
If KSTACK_PAGES was changed to anything alse than the default,
the value from param.h was taken instead in some places and
the value from KENRCONF in some others. This resulted in
inconsistency which caused corruption in SMP envorinment.

Ensure all places where KSTACK_PAGES are used the opt_kstack_pages.h
is included.

The file opt_kstack_pages.h could not be included in param.h
because was breaking the toolchain compilation.

Reviewed by:   kib
Obtained from: Semihalf
Sponsored by:  The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3094
2015-07-16 10:46:52 +00:00
Christian Brueffer
f4c1eac7cd Spell crypto correctly. 2015-07-14 10:47:56 +00:00
Konstantin Belousov
85237e335d Convert between abridged (from FXSAVE) and unabridged (from FSAVE)
versions of the x87 tags.  The conversion is naive, used abridged tag
is converted to valid unabridged, without additional checks for zero
and special values.

Noted by:	bde
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
2015-07-10 09:20:13 +00:00
Konstantin Belousov
bcfc2be186 Duplicate the copyright from the i386/i386/machdep.c into
i386/include/frame.h after a code was moved from machdep.c to frame.h
in r284925.

Use include guards style similar to other guards.

Noted by:	bde
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
2015-07-10 09:15:06 +00:00
John-Mark Gurney
e808e13b8b Now that aesni won't reuse fpu contexts (D3016), add seatbelts to the
fpu code to prevent other reuse of the contexts in the future...

Differential Revision:        https://reviews.freebsd.org/D3015
Reviewed by:	kib, gnn
2015-07-08 19:26:36 +00:00
Konstantin Belousov
8954a9a4e6 Add the atomic_thread_fence() family of functions with intent to
provide a semantic defined by the C11 fences with corresponding
memory_order.

atomic_thread_fence_acq() gives r | r, w, where r and w are read and
write accesses, and | denotes the fence itself.

atomic_thread_fence_rel() is r, w | w.

atomic_thread_fence_acq_rel() is the combination of the acquire and
release in single operation.  Note that reads after the acq+rel fence
could be made visible before writes preceeding the fence.

atomic_thread_fence_seq_cst() orders all accesses before/after the
fence, and the fence itself is globally ordered against other
sequentially consistent atomic operations.

Reviewed by:	alc
Discussed with:	bde
Sponsored by:	The FreeBSD Foundation
MFC after:	3 weeks
2015-07-08 18:12:24 +00:00
Achim Leubner
4e1bc9a039 Driver 'pmspcv' added. Supports PMC-Sierra PM8001/8081/8088/8089/8074/8076/8077 SAS/SATA HBA Controllers. 2015-07-07 13:17:02 +00:00
George V. Neville-Neil
0661a7c224 Fix up tabs vs. spaces 2015-07-04 20:31:06 +00:00
George V. Neville-Neil
3839369c03 Enable IPSEC in all GENERIC kernels.
Universe and kernel build tests passed 4 July 2015

PR:		128030
Sponsored by:	Rubicon Communications (Netgate)
2015-07-04 17:37:00 +00:00
Konstantin Belousov
6fdfd88220 Use single instance of the identical INKERNEL() and PMC_IN_KERNEL()
macros on amd64 and i386.  Move the definition to machine/param.h.
kgdb defines INKERNEL() too, the conflict is resolved by renaming kgdb
version to PINKERNEL().

On i386, correct the lowest kernel address.  After the shared page was
introduced, USRSTACK no longer points to the last user address + 1 [*]

Submitted by:	Oliver Pinter [*]
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
2015-07-02 14:37:21 +00:00
Konstantin Belousov
b24de3ac40 Provide npx_get_fsave(9) and npx_set_fsave(9) functions to obtain and
restore the FPU state from the format of machine FSAVE area.  The
intended use is for ABI emulators to provide FSAVE-formatted FPU state
to usermode requiring it, while kernel could use FXSAVE due to
XMM/XSAVE.

The core functionality to convert from/to FXSAVE format is shared with
the fill_fpregs_xmm() and set_fpregs_xmm().  Move the later functions
to npx.c and rename them to npx_fill_fpregs_xmm() and
npx_set_fpregs_xmm().  They differ from nptx_get/set_fsave(9) since
our mcontext contains padding to be zeroed or ignored.

fill_fpregs() and set_fpregs() could be converted to use the new
interface, but there are small differences to handle.

Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
2015-06-29 12:06:36 +00:00
Konstantin Belousov
f9343dacbd Move CS_SECURE() and EFL_SECURE() macros to the machine/frame.h. They
are useful for most implementations of sendsig().

Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
2015-06-29 10:35:00 +00:00
Konstantin Belousov
3ac3c0f269 Add a comment about too strong semantic of atomic_load_acq() on x86.
Submitted by:	bde
MFC after:	2 weeks
2015-06-29 09:58:40 +00:00
Konstantin Belousov
1817023775 Add x86 PT_GETFSBASE, PT_GETGSBASE machine-depended ptrace requests to
obtain the thread %fs and %gs bases.  Add x86 PT_SETFSBASE and
PT_SETGSBASE requests to set the bases from debuggers.  The set
requests, similarly to the sysarch({I386,AMD64}_SET_FSBASE),
override the corresponding segment registers.

The main purpose of the operations is to retrieve and modify the tcb
address for debuggee.

Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
2015-06-29 07:07:24 +00:00
Konstantin Belousov
06d058bd23 Reduce code duplication. Add helper fill_based_sd(9) which creates a
based user data descriptor covering whole VA.

Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
2015-06-29 06:59:08 +00:00
Konstantin Belousov
7626d062c3 Remove unneeded data dependency, currently imposed by
atomic_load_acq(9), on it source, for x86.

Right now, atomic_load_acq() on x86 is sequentially consistent with
other atomics, code ensures this by doing store/load barrier by
performing locked nop on the source.  Provide separate primitive
__storeload_barrier(), which is implemented as the locked nop done on
a cpu-private variable, and put __storeload_barrier() before load, to
keep seq_cst semantic but avoid introducing false dependency on the
no-modification of the source for its later use.

Note that seq_cst property of x86 atomic_load_acq() is not documented
and not carried by atomics implementations on other architectures,
although some kernel code relies on the behaviour.  This commit does
not intend to change this.

Reviewed by:	alc
Discussed with:	bde
Tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
2015-06-28 05:04:08 +00:00
Mateusz Guzik
4da8456f0a Replace struct filedesc argument in getvnode with struct thread
This is is a step towards removal of spurious arguments.
2015-06-16 13:09:18 +00:00
John Baldwin
5eb95e11ba Report the values of x86 segment registers to remote debuggers.
While here, also report %eflags from the i386 trapframe.

Differential Revision:	https://reviews.freebsd.org/D2743
Reviewed by:	kib
Obtained from:	1 month
2015-06-12 15:14:08 +00:00
John Baldwin
9f9d9cf33e Ensure that the upper 16 bits of segment registers manually saved in
trapframes are cleared by explicitly pushing a zero and then moving
the segment register into the low 16 bits.  Certain Intel processors
treat a push of a segment register as a move of the segment register
into the low 16 bits leaving the upper 16 bits of the word in the
stack unchanged.

Reviewed by:	kib
MFC after:	1 month
2015-06-12 15:06:17 +00:00
Ruslan Bukin
4f4d15f0d0 Allow DTrace to be compiled-in to the kernel.
This will require for AArch64 as we dont have modules yet.

Sponsored by:	HEIF5
Sponsored by:	ARM Ltd.
Differential Revision:	https://reviews.freebsd.org/D1997
2015-06-10 15:53:39 +00:00
Mateusz Guzik
f6f6d24062 Implement lockless resource limits.
Use the same scheme implemented to manage credentials.

Code needing to look at process's credentials (as opposed to thred's) is
provided with *_proc variants of relevant functions.

Places which possibly had to take the proc lock anyway still use the proc
pointer to access limits.
2015-06-10 10:48:12 +00:00
Mateusz Guzik
4ea6a9a28f Generalised support for copy-on-write structures shared by threads.
Thread credentials are maintained as follows: each thread has a pointer to
creds and a reference on them. The pointer is compared with proc's creds on
userspace<->kernel boundary and updated if needed.

This patch introduces a counter which can be compared instead, so that more
structures can use this scheme without adding more comparisons on the boundary.
2015-06-10 10:43:59 +00:00
Alan Cox
65a9768f62 Account for superpage mappings that are created by pmap_copy(). 2015-06-09 18:04:28 +00:00
Dimitry Andric
90acdcbc88 Merge r283870 from amd64:
Remove unneeded NULL checks in trap_fatal().

Since td_name is an array member of struct thread, it can never be NULL,
so the check can be removed.  In addition, curproc can never be NULL,
so remove the if statement, and splice the two printfs() together.

While here, remove the u_long cast, and use the correct printf format
specifier for curproc->p_pid.

Requested by:	jhb
MFC after:	3 days
2015-06-08 20:12:44 +00:00
Alan Cox
966272ca33 Retire VM_FREEPOOL_CACHE as the next step in eliminating PG_CACHE pages.
Differential Revision:	https://reviews.freebsd.org/D2712
Reviewed by:	kib
Sponsored by:	EMC / Isilon Storage Division
2015-06-08 04:59:32 +00:00
Konstantin Belousov
32a1e9e4a5 Update print_INTEL_TLB() by the tag values from the Intel SDM
rev. 55.  The modern CPUs cache and TLB descriptions looked quite
questionable without the update, e.g. Haswell i7 4770S reported:
	Data TLB: 4 KB pages, 4-way set associative, 64 entries
	L2 cache: 256 kbytes, 8-way associative, 64 bytes/line
After the update, the report is:
	Data TLB: 1 GByte pages, 4-way set associative, 4 entries
	Data TLB: 4 KB pages, 4-way set associative, 64 entries
	Instruction TLB: 2M/4M pages, fully associative, 8 entries
	Instruction TLB: 4KByte pages, 8-way set associative, 64 entries
	64-Byte prefetching
	Shared 2nd-Level TLB: 4 KByte/2MByte pages, 8-way associative, 1024 entries
	L2 cache: 256 kbytes, 8-way associative, 64 bytes/line
Some tags were apparently removed from the table 3-21, Vol. 2A.  Keep
them around, but add a comment stating the removal.

Update the format line for cpu_stdext_feature according to the bits
from the SDM rev.55.  It appears that Haswells do not store %cs and
%ds values in the FPU save area.

Store content of the %ecx register from the CPUID leaf 0x7
subleaf 0 as cpu_stdext_feature2 and print defined bits from it,
again acording to SDM rev. 55.

Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
2015-06-06 22:03:24 +00:00
Dmitry Chagin
d707582f83 When I merged the lemul branch I missied kib@'s r282708 commit.
This is not the final fix as I need properly cleanup thread resources
before other threads suicide.

Tested by:	Ruslan Makhmatkhanov
2015-05-25 20:44:46 +00:00
Dmitry Chagin
5c5aac2d45 Regen for r283492. 2015-05-24 18:09:01 +00:00
Dmitry Chagin
9802eb9ebc Implement Linux specific syncfs() system call. 2015-05-24 18:08:01 +00:00
Dmitry Chagin
c532a88cfc Regen for r283488. 2015-05-24 18:05:21 +00:00
Dmitry Chagin
e1ff74c0f7 Implement recvmmsg() and sendmmsg() system calls. 2015-05-24 18:04:04 +00:00
Dmitry Chagin
b7aaa9fdb0 Reduce duplication between MD Linux code by moving msg related
struct definitions out into the compat/linux/linux_socket.h
2015-05-24 18:03:14 +00:00
Dmitry Chagin
3ce05165b1 Regen for r283484. 2015-05-24 18:02:17 +00:00
Dmitry Chagin
6e4c8004dc Implement epoll_pwait() system call. 2015-05-24 18:00:14 +00:00
Dmitry Chagin
ca045164a7 Regen for r283480. 2015-05-24 17:58:24 +00:00
Dmitry Chagin
19d8b461f4 Add utimensat() system call.
The patch developed by Jilles Tjoelker and Andrew Wilcox and
adopted for lemul branch by me.
2015-05-24 17:57:07 +00:00
Dmitry Chagin
0c38abc250 The kernel sends signals to the processes via ABI specific sv_sendsig method.
Native ABI do not need signal conversion, only emulators may want this. Usually
emulators implements its own sv_sendsig method. For now only ibcs2 emulator does
not have own sv_sendsig implementation and depends on native sendsig() method.
So, remove any extra attempts to convert signal numbers from native sendsig()
methods except from i386 where ibsc2 is living.
2015-05-24 17:56:02 +00:00
Dmitry Chagin
4ab7403bbd Rework signal code to allow using it by other modules, like linprocfs:
1. Linux sigset always 64 bit on all platforms. In order to move Linux
sigset code to the linux_common module define it as 64 bit int. Move
Linux sigset manipulation routines to the MI path.

2. Move Linux signal number definitions to the MI path. In general, they
are the same on all platforms except for a few signals.

3. Map Linux RT signals to the FreeBSD RT signals and hide signal conversion
tables to avoid conversion errors.

4. Emulate Linux SIGPWR signal via FreeBSD SIGRTMIN signal which is outside
of allowed on Linux signal numbers.

PR:		197216
2015-05-24 17:47:20 +00:00
Dmitry Chagin
a7ac457613 According to Linux man sigaltstack(3) shall return EINVAL if the ss
argument is not a null pointer, and the ss_flags member pointed to by ss
contains flags other than SS_DISABLE. However, in fact, Linux also
allows SS_ONSTACK flag which is simply ignored.

For buggy apps (at least mono) ignore other than SS_DISABLE
flags as a Linux do.

While here move MI part of sigaltstack code to the appropriate place.

Reported by:	abi at abinet dot ru
2015-05-24 17:44:08 +00:00
Dmitry Chagin
657100de57 Regen for r283467. 2015-05-24 17:39:18 +00:00
Dmitry Chagin
fcdffc03f8 Call nosys in case when the incorrect syscall number is specified.
Reported by:	trinity
2015-05-24 17:38:02 +00:00
Dmitry Chagin
8d939ad405 Regen for r283465. 2015-05-24 17:35:42 +00:00