Commit graph

959 commits

Author SHA1 Message Date
Tomas Hruby
5ab87a6c38 ioapic - missing volatiles
leads to a kernel panic when using clang and SMP

reported by trd <trdempsey.201201@gmail.com>
2012-03-29 00:53:38 -07:00
Ben Gras
1e399dd8bd various kernel printing fixes
. remove some call cycles by low-level functions invoking printf(); e.g.
	  send_sig() gets a return value that the caller should check
	. reason: very-early-phase printf() would trigger a printf() causing
	  infinite recursion -> GPF
	. move serial initialization a little earlier so DEBUG_EXTRA works for
	  serial earlier (e.g. its first instance, for "cstart")
	. closes tracker item 583:
	  System Fails to Complete Startup with Verbose 2 and 3 Boot Parameters,
	  reported by Stephen Hatton / pikpik.
2012-03-28 18:23:12 +02:00
Ben Gras
a5190194a0 build: don't -L/usr/pkg/lib
You might have to update the compiler-rt package! See UPDATING.

	. the purpose of this -L was solely to find compiler-rt, which contains
	  runtime support code for clang-compiled binaries
	. this also makes all other packaged libraries visible, however
	. it is cleaner to isolate the base system from packages, and so
	  compiler-rt puts itself in /usr/pkg/compiler-rt/lib/ too, which the
	  base system henceforth uses exclusively
	. e.g. this solves a link failure when libfetch is installed as a
	  package
	. the new compiler-rt package also puts itself in /usr/pkg/lib for 'old'
	  systems; that is harmless. The benefit of 'new' systems is that the other
	  packages are hidden.
2012-03-27 12:31:30 +02:00
David van Moolenbroek
9cca9d7566 Kernel: arch-related cleanup
- move umap_bios() into arch-specific code
- move proc.p_fpu_state access into arch-specific blocks
2012-03-26 14:19:33 +02:00
Ben Gras
204ae72525 retire _ANSI and <minix/ansi.h> 2012-03-25 21:58:27 +02:00
Ben Gras
7336a67dfe retire PUBLIC, PRIVATE and FORWARD 2012-03-25 21:58:14 +02:00
Ben Gras
6a73e85ad1 retire _PROTOTYPE
. only good for obsolete K&R support
	. also remove a stray ansi.h and the proto cmd
2012-03-25 16:17:10 +02:00
David van Moolenbroek
70abb127cc Add sys_vumap() kernel call
This new call is a vectored version of sys_umap(). It supports batch
lookups, non-contiguous memory, faulting in memory, and basic access
checks.
2012-03-24 19:51:13 +01:00
David van Moolenbroek
2a395dd8b4 Kernel: introduce vm_check_range 2012-03-24 19:51:13 +01:00
David van Moolenbroek
08af3f672b Kernel: replace vm_contiguous with vm_lookup_range 2012-03-24 19:51:12 +01:00
Ben Gras
6af9856d4a libcompat_minix-centric cleanup
remove some old minix-userland-specific stuff

	. /etc/ttytab as a file, and minix-compat function (fftyslot()),
	  replaced by /etc/ttys and new libc functions
	. also remove minix-specific nlist(), cuserid(), fttyslot(), v8 regex
	  functions and <compat/regex.h>
	. and remaining minix-only utilities that use them
	. also unused <compat/pwd.h> and <compat/syslog.h> and
	  redundant <sys/sigcontext.h>
2012-03-16 17:06:24 +01:00
David van Moolenbroek
1512dc5c23 Kernel: do not retry message delivery upon failure 2012-03-05 22:38:04 +01:00
David van Moolenbroek
c8c9565a03 Kernel: only reset/reload FPU state when necessary 2012-03-05 22:32:14 +01:00
David van Moolenbroek
a615a7d4d2 Kernel: retain FPU state upon save
On the x86, saving FPU state has the side effect of resetting this
state. In some cases (fork, getcontext), this would cause the state
to be lost. This patch restores the FPU state right after saving it,
except when different state is loaded immediately after.
2012-03-05 22:32:14 +01:00
David van Moolenbroek
0a8a2ecfb5 Kernel: pass FPU restore exception to user process
Previously, user processes could cause a kernel panic upon FPU state
restore, by passing bogus FPU state to the kernel (through e.g.
sigreturn). With this patch, the process is now sent a SIGFPE signal
instead.
2012-03-05 22:32:14 +01:00
David van Moolenbroek
4b6a98de5f Kernel: adjust FPU state upon process slot swap
This fixes seemingly random FPU exceptions and kernel panics occurring
after a system server restart.
2012-03-05 22:32:14 +01:00
Tomas Hruby
036ce9d4db Revert "SMP - no_apic=0 and acpi=1 set when CONFIG_SMP=y"
This reverts commit c468f4efa5.

Since we use the new boot loader, this hack is no longer necessary.
2012-02-24 10:16:55 +01:00
Arun Thomas
1f0bfa8519 kernel: Update copyright date 2012-02-22 16:36:26 +01:00
Ben Gras
ca47635d0a try multiple reset methods
. fixes reboot-hang under vbox
	. makes experience nicer under vmware
	. taken from netbsd reset code
2012-02-20 23:46:38 +01:00
Arun Thomas
96940bcd57 kernel/utility.c: fix implicit decl warnings 2012-02-17 15:30:03 +01:00
Arun Thomas
ff56906879 Remove obsolete INSTALLFLAGS from makefiles 2012-02-16 23:26:38 +01:00
Antoine Leca
3fb8cb760c More cleaning up 2012-02-15 19:04:58 +00:00
Antoine Leca
f4ffbc6072 Make ELF kernel boot faster 2012-02-14 14:52:15 +01:00
Ben Gras
2fe8fb192f Full switch to clang/ELF. Drop ack. Simplify.
There is important information about booting non-ack images in
docs/UPDATING. ack/aout-format images can't be built any more, and
booting clang/ELF-format ones is a little different. Updating to the
new boot monitor is recommended.

Changes in this commit:

	. drop boot monitor -> allowing dropping ack support
	. facility to copy ELF boot files to /boot so that old boot monitor
	  can still boot fairly easily, see UPDATING
	. no more ack-format libraries -> single-case libraries
	. some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases
	. drop several ack toolchain commands, but not all support
	  commands (e.g. aal is gone but acksize is not yet).
	. a few libc files moved to netbsd libc dir
	. new /bin/date as minix date used code in libc/
	. test compile fix
	. harmonize includes
	. /usr/lib is no longer special: without ack, /usr/lib plays no
	  kind of special bootstrapping role any more and bootstrapping
	  is done exclusively through packages, so releases depend even
	  less on the state of the machine making them now.
	. rename nbsd_lib* to lib*
	. reduce mtree
2012-02-14 14:52:02 +01:00
Evgeniy Ivanov
2487445f5f make panic() work for multiboot/elf case
. we cannot use the boot monitor to print the system diag buffer
	. for serial, we do nothing, just reset, everything is already printed
	. for not-serial, we print the current diag buffer using direct video
	  memory access from the kernel
2012-02-14 14:48:10 +01:00
Ben Gras
636264c1c6 Fixes for loading kernel with multiboot
While parsing command line, only consider "variable=value" to
be part of environment.

Patch by Antoine Leca.
2012-02-09 18:54:45 +01:00
Tomas Hruby
5c0927e108 SMP - clock calibration spurious IRQ deadlock fix
- this patch fixes a deadlock which may occur if we get a
   spurious interrupt while calibrating clocks during the boot
   time. Since we never handle interrupts while in the kernel
   (BKL locked) the interrupt code locks the lock. This is a
   different situation, a corner case, boot time only. We do not
   return to userspace but to the kernel, so the BKL is not
   unlocked. So we need irq handler which leaves the BKL
   unlocked.  The clock handler does it already, this patch adds
   a dummy spurious irq handler for the same reason. It is better
   to handle the situation this way to keep the normal runtime
   code simple.
2012-01-26 11:39:40 +00:00
Tomas Hruby
c468f4efa5 SMP - no_apic=0 and acpi=1 set when CONFIG_SMP=y
- this is a temporary change which makes images compiled for SMP
  boot in SMP mode by default.

- this change is needed until we can configure the multiboot
  images from the boot loader again.
2012-01-25 19:02:13 +00:00
Tomas Hruby
9e1d244cbe Revert 93b9873a56
- non need to have free PDEs per CPU since we only run one
  instance of the kernel at any time
2012-01-25 18:59:18 +00:00
Thomas Veerman
a6d0ee24c3 Use correct value for _NSIG
User processes can send signals with number up to _NSIG. There are a few
signal numbers above that used by the kernel, but should explicitly not
be included in the range or range checks in PM will fail.

The system processes use a different version of sigaddset, sigdelset,
sigemptyset, sigfillset, and sigismember which does not include a range
check on signal numbers (as opposed to the normal functions used by normal
processes).

This patch unbreaks test37 when the boot image is compiled with GCC/Clang.
2012-01-16 11:42:29 +00:00
Tomas Hruby
758d788bbe SMP - asyn send SMP safe
- we must not deliver messages from/to unstable address spaces.
  In such a case, we must postpone the delivery. To make sute
  that a process which is expecting an asynchronous message does
  not starve, we must remember that we skipped delivery of some
  messages and we must try to deliver again once the source
  address space is stable again.
2012-01-13 11:30:01 +00:00
Tomas Hruby
0bb56e0e04 SMP - smp_schedule()
- always issues an IPI
2012-01-13 11:30:01 +00:00
Tomas Hruby
41bd5f2fc6 SMP - cpu_is_idle made volatile 2012-01-13 11:30:00 +00:00
Tomas Hruby
8fa95abae4 SMP - fixed usage of stale TLB entries
- when kernel copies from userspace, it must be sure that the TLB
  entries are not stale and thus the referenced memory is correct

- everytime we change a process' address space we set p_stale_tlb
  bits for all CPUs.

- Whenever a cpu finds its bit set when it wants to access the
  process' memory, it refreshes the TLB

- it is more conservative than it needs to be but it has low
  overhead than checking precisely
2012-01-13 11:30:00 +00:00
Tomas Hruby
0a55e63413 SMP - fixed IPI livelock
- two CPUs can issue IPI to each other now without any hazzard

- we must be able to handle synchronous scheduling IPIs from
  other CPUs when we are waiting for attention from another one.
  Otherwise we might livelock.

- necessary barriers to prevent reordering
2012-01-13 11:30:00 +00:00
Tomas Hruby
0468fca72b SMP - do_update fix
- adjust_proc_slot() must preserve scheduling info, for example
  on which cpu the process should run

- do_update() - consitency check
2012-01-13 11:30:00 +00:00
Tomas Hruby
192db70960 KERNEL - cause SIGSEGV if bad pointer to kernel 2012-01-13 11:30:00 +00:00
Tomas Hruby
c82a5dd3e3 KERNEL - mini_senda simplification 2012-01-13 11:29:59 +00:00
Tomas Hruby
e4d46a2146 KERNEL - has_pending() not exposed
- has_pending() takes a special argument that tells the code
  whether we are scanning for asynchronous message or something
  else.

- has_pending() is not used directly anymore

- the new functions are wrappings around has_pending() to make
  the use more comfortable.

- these functions should become static inline eventually
2012-01-13 11:29:59 +00:00
Tomas Hruby
8d0a1f71bf KERNEL - do_privctl() fix
- after a driver is restarted, do not register permissions
  which are already set again.
2012-01-13 11:29:59 +00:00
Antoine Leca
36d29dedd5 Allow clang for kernel compilation
Remove .ident sections, and force separations of .text and
.data sections into separate program headers, for the benefit
of the check done by MINIX boot monitor in multiboot mode.
2012-01-12 13:36:22 +01:00
Ben Gras
7cd4002083 vm: clear map cache after kernel requests
. fixes a dirty tlb situation (i.e. random crashes)
	  on some hardware, seemingly new intel architectures
	  (e.g. my desktop i7 machine)
2012-01-11 01:15:35 +01:00
Tomas Hruby
aca5862db1 SMP - kernel links again 2011-12-20 13:05:25 +00:00
Tomas Hruby
9cd53f1cc0 SMP - fixed compilation and removed warnings 2011-12-20 12:58:20 +00:00
David van Moolenbroek
84662ec4b3 libsys: unbreak getidle() 2011-12-16 16:06:09 +00:00
Ben Gras
21168577a5 add -L for future compiler-rt lib location 2011-12-08 18:07:57 +01:00
David van Moolenbroek
1e1db53986 Introduce sys_getregs call, and let vfs use it 2011-11-22 02:07:33 +01:00
David van Moolenbroek
b02c260ecb Miscellaneous legacy cleanup 2011-11-07 22:20:55 +01:00
David van Moolenbroek
0f3423cd75 Kernel: fix compilation with DEBUG_RACE on 2011-11-07 19:59:02 +01:00
David van Moolenbroek
8b00ebde78 Kernel: remove unused MF_ASYNMSG 2011-11-01 19:21:19 +00:00
Arun Thomas
8b4492ed1c kernel: remove unused var 2011-11-02 18:45:08 +01:00
David van Moolenbroek
1992529666 Kernel: fix for senda erroneously setting errors
Bug reported and fixed by Arne Welzel.
2011-10-31 18:43:37 +00:00
Arun Thomas
f71ec49525 kernel: Remove legacy boot vars from pre_init 2011-09-19 16:39:51 +02:00
Arun Thomas
cb54d96eec Remove legacy boot monitor vars 2011-09-16 20:10:47 +02:00
Arun Thomas
46581e701a Add MKBOOTPARAM option 2011-09-16 17:31:07 +02:00
Arun Thomas
92fa3189ab MKSYSDEBUG: conditionally compile more debug code 2011-09-16 15:25:26 +02:00
Arun Thomas
8a0901c4cb Add MKTRACE 2011-09-07 17:52:48 +02:00
Arun Thomas
4ca68d42a0 Add MKLIVEUPDATE and MKSTATECTL 2011-09-02 16:57:22 +02:00
Arun Thomas
27c0e801f2 Cleaner MKSYSDEBUG option 2011-08-18 15:21:29 +02:00
Arun Thomas
593e3221fc Rename MKDEBUG to MKSYSDEBUG 2011-08-16 22:30:10 +02:00
Arun Thomas
40592de32d Optionally disable kernel debug code 2011-08-16 17:18:55 +02:00
Ben Gras
58c4a9b5f4 kernel: don't use -ffreestanding
. workaround for clang's stdint.h __STDC_HOSTED__ test
	  that causes the host stdint.h to be ignored for -ffreestanding,
	  causing a type to be double-defined in the kernel
2011-08-13 11:04:37 +00:00
Ben Gras
ca5e8b2c2d kernel: show segment-adjusted pagefault addr 2011-08-12 15:16:52 +00:00
Ben Gras
35cc7fbeb8 kernel: invlpg facility
. only use for single-page invalidations initially
	. shows tiny but statistically significant performance
	  improvement; will be more helpful in certain VM debug
	  modes
2011-08-12 13:08:27 +00:00
Arun Thomas
862fb8354d minix.ack.mk: use CPPFLAGS for ACK asm files 2011-08-05 14:16:48 +02:00
Ben Gras
c484bc1dc8 unbreak oxpcie in kernel 2011-08-04 17:26:39 +00:00
Arun Thomas
d69519f86a kernel: don't build cprofile code by default 2011-08-02 15:25:54 +02:00
Arun Thomas
aaefc6f838 Add MKMCONTEXT option 2011-08-02 13:57:31 +02:00
Arun Thomas
ae561b8f12 Add MKAPIC and MKACPI options 2011-07-31 16:22:43 +02:00
Arun Thomas
1a8cf59d04 Add MKWATCHDOG option 2011-07-29 20:37:39 +02:00
Ben Gras
01b152d6d9 kernel: add prototype for inkernel_disaster 2011-07-22 15:19:40 +02:00
Ben Gras
b984fa41df Revert "print kernel stacktrace for exceptions in kernel"
This reverts commit eff1369cab.

This was in a working branch and I only intended to commit
exception.c. But I committed the exact inverse. Sorry.
2011-07-22 15:01:44 +02:00
Erik van der Kouwe
dcc683b4ae Also compile the kernel as i586 (instead of i386) 2011-07-22 13:16:10 +02:00
Ben Gras
eff1369cab print kernel stacktrace for exceptions in kernel
fpu alignment check feature, checksum feature
2011-07-22 11:03:45 +00:00
Ben Gras
7ee78ffb82 kernel: improve exception debug printing
. fold 2 exception-in-kernel cases (pagefault and rest)
	  into 1
	. for exceptions that occur in kernel, don't just print
	  kernel stacktrace (typically that is just the exception
	  handler) but also the stacktrace of when the exception
	  happened
2011-07-22 10:57:08 +00:00
Arun Thomas
c356e9997e kernel: fix GCC warnings 2011-07-18 19:44:59 +02:00
Evgeniy Ivanov
5da4a0bd56 Move minimal libc from libsys into separate lib.
Now users can choose between libsys, libsys + libminc and
libsys + libc. E.g. PUFFS/FUSE servers need libsys + libc while
old servers can use libsys + libminc.
2011-07-09 22:32:38 +02:00
Arun Thomas
b956c8735e Fix GCC image building 2011-07-09 15:04:42 +02:00
Arun Thomas
daa14edc0d kernel: make clang-buildable 2011-06-28 15:34:19 +02:00
Arun Thomas
93ae43f577 boot: Add multiboot support
Not yet fully spec-compliant; work in progress
2011-06-24 17:21:51 +02:00
Ben Gras
e785381d4d introduce option to time assert()s
. remove a few asserts in the kernel and 64bi library
    that are not compatible with the timing code
  . change the TIME_BLOCKS code a little to work in-kernel
2011-06-24 16:00:42 +02:00
Gianluca Guida
cc17b27a2b Build NetBSD libc library in world in ELF mode.
3 sets of libraries are built now:
  . ack: all libraries that ack can compile (/usr/lib/i386/)
  . clang+elf: all libraries with minix headers (/usr/lib/)
  . clang+elf: all libraries with netbsd headers (/usr/netbsd/)

Once everything can be compiled with netbsd libraries and headers, the
/usr/netbsd hierarchy will be obsolete and its libraries compiled with
netbsd headers will be installed in /usr/lib, and its headers
in /usr/include. (i.e. minix libc and current minix headers set
will be gone.)

To use the NetBSD libc system (libraries + headers) before
it is the default libc, see:
   http://wiki.minix3.org/en/DevelopersGuide/UsingNetBSDCode
This wiki page also documents the maintenance of the patch
files of minix-specific changes to imported NetBSD code.

Changes in this commit:
  . libsys: Add NBSD compilation and create a safe NBSD-based libc.
  . Port rest of libraries (except libddekit) to new header system.
  . Enable compilation of libddekit with new headers.
  . Enable kernel compilation with new headers.
  . Enable drivers compilation with new headers.
  . Port legacy commands to new headers and libc.
  . Port servers to new headers.
  . Add <sys/sigcontext.h> in compat library.
  . Remove dependency file in tree.
  . Enable compilation of common/lib/libc/atomic in libsys
  . Do not generate RCSID strings in libc.
  . Temporarily disable zoneinfo as they are incompatible with NetBSD format
  . obj-nbsd for .gitignore
  . Procfs: use only integer arithmetic. (Antoine Leca)
  . Increase ramdisk size to create NBSD-based images.
  . Remove INCSYMLINKS handling hack.
  . Add nbsd_include/sys/exec_elf.h
  . Enable ELF compilation with NBSD libc.
  . Add 'make nbsdsrc' in tools to download reference NetBSD sources.
  . Automate minix-port.patch creation.
  . Avoid using fstavfs() as it is *extremely* slow and unneeded.
  . Set err() as PRIVATE to avoid name clash with libc.
  . [NBSD] servers/vm: remove compilation warnings.
  . u32 is not a long in NBSD headers.
  . UPDATING info on netbsd hierarchy
  . commands fixes for netbsd libc
2011-06-24 11:46:30 +02:00
Erik van der Kouwe
35b203fdb1 Initialize NMI watchdog only once, after enabling paging 2011-06-22 17:56:57 +02:00
Erik van der Kouwe
6e0f3b3bda Split off sys_umap_remote from sys_umap
sys_umap now supports only:
- looking up the physical address of a virtual address in the address space
  of the caller;
- looking up the physical address of a grant for which the caller is the
  grantee.

This is enough for nearly all umap users. The new sys_umap_remote supports
lookups in arbitrary address spaces and grants for arbitrary grantees.
2011-06-10 14:28:20 +00:00
Ben Gras
a77c2973b3 fix clang warnings -R in kernel/ and servers/ 2011-06-09 16:09:13 +02:00
Erik van der Kouwe
b08dff6011 Remove unused duplicate grant code in umap 2011-06-09 05:06:34 +00:00
Erik van der Kouwe
1e5f9dfa14 Make sys_umap on grants check grantee 2011-06-09 05:05:20 +00:00
Ben Gras
230b7775fe changes for detecting and building for clang/binutils elf
and minor fixes:
 . add ack/clean target to lib, 'unify' clean target
 . add includes as library dependency
 . mk: exclude warning options clang doesn't have in non-gcc
 . set -e in lib/*.sh build files
 . clang compile error circumvention (disable NOASSERTS for release builds)
2011-06-07 16:49:52 +02:00
Tomas Hruby
423be1545c Fix for SPROFILE == 0
- contributed by Antoine Leca
2011-05-25 09:42:11 +02:00
Tomas Hruby
bed9e48c12 APIC timer needs rearming before halting the cpu
- time stops if there is no activity and the timer expired before
  we halted the cpu

- restart_local_timer() checks if the timer has expired and if so it
  restarts it

- we do the same when switching back to userspace
2011-05-11 11:54:23 +02:00
Arun Thomas
350b60661a ELF multiboot support 2011-05-04 18:51:43 +02:00
Erik van der Kouwe
e969b5e11b Remote unused segctl kernel call 2011-04-26 23:28:23 +02:00
Ben Gras
2b09bfde6d kernel: fix logic error in the case vm_lookup fails 2011-04-20 10:17:08 +00:00
David van Moolenbroek
46cee00ad8 Kernel: try_async/try_one fixes
- skip processes that are not asynsending to the target
- do not clear whole asynsend table upon IPC permission error
- be more accepting when one table entry is bogus later on
2011-04-18 22:56:34 +00:00
Tomas Hruby
dc8ee363db SMP - INIT IPI deasserting fix
When deasserting the INIT IPI the DM field must be zero
2011-04-13 16:57:43 +00:00
David van Moolenbroek
c51cd5fe91 Server/driver protocols: no longer allow third-party copies.
Before safecopies, the IO_ENDPT and DL_ENDPT message fields were needed
to know which actual process to copy data from/to, as that process may
not always be the caller. Now that we have full safecopy support, these
fields have become useless for that purpose: the owner of the grant is
*always* the caller. Allowing the caller to supply another endpoint is
in fact dangerous, because the callee may then end up using a grant
from a third party. One could call this a variant of the confused
deputy problem.

From now on, safecopy calls should always use the caller's endpoint as
grant owner. This fully obsoletes the DL_ENDPT field in the
inet/ethernet protocol. IO_ENDPT has other uses besides identifying the
grant owner though. This patch renames IO_ENDPT to USER_ENDPT, not only
because that is a more fitting name (it should never be used for I/O
after all), but also in order to intentionally break any old system
source code outside the base system. If this patch breaks your code,
fixing it is fairly simple:

- DL_ENDPT should be replaced with m_source;
- IO_ENDPT should be replaced with m_source when used for safecopies;
- IO_ENDPT should be replaced with USER_ENDPT for any other use, e.g.
  when setting REP_ENDPT, matching requests in CANCEL calls, getting
  DEV_SELECT flags, and retrieving of the real user process's endpoint
  in DEV_OPEN.

The changes in this patch are binary backward compatible.
2011-04-11 17:35:05 +00:00
Thomas Veerman
7457cbe62f Enable sending a notification when sending of an asynchronous message was
completed (successfully or not). AMF_NOTIFY_ERR can be used if the sender 
only wishes to be notified in case of an error (e.g., EDEADSRCDST). A new
endpoint ASYNCM will be the sender of the notification.
2011-04-08 15:14:48 +00:00
Thomas Veerman
16e0e9370e Use a bitmap for pending asynchronous messages instead of a global flag.
That way it works similar to pending notifications.
2011-04-08 15:03:33 +00:00
Thomas Veerman
9db2311b22 Reduce the number of copies done by the kernel when handling retrieval and
delivery of asynchronous messages.
2011-04-08 14:53:55 +00:00
Tomas Hruby
8200e91073 Fixed smp compilation
- missing u64.h include after 64bit routines for gcc got inlined
2011-04-08 11:52:30 +00:00
Erik van der Kouwe
03a7d0e8ae Add cttybaud boot monitor variable to control speed of serial console (combine with ctty 0) 2011-03-16 12:25:10 +00:00
Arun Thomas
25a790a631 VM and kernel support for ELF 2011-02-26 23:00:55 +00:00
David van Moolenbroek
61ad5f9b94 Kernel: small comment fix (Bug#562, reported by Ryan Riley) 2011-02-25 16:46:30 +00:00
Ben Gras
c6e6aa8850 mark forked process as such in the kernel p_name
. helps debugging output; you can see the difference
    between parent and child easily (it's sometimes 
    confusing to see an expected endpoint number with
    an unexpected name, i.e. before exec())
  . when processes crash after fork and before exec, it's
    an instant hint that that's what's going on, instead of
    it being the parent (endpoint numbers don't usually convey
    this)
  . name returns to 'normal' after exec(), so *F isn't visible
    normally at all. (Except for for RS which forks apparently.)
2011-02-21 15:05:32 +00:00
Ben Gras
07bfb4f4e4 kernel - account for kernel cpu time (ipc, kcalls) in caller 2011-02-08 13:58:32 +00:00
Ben Gras
b2d1109737 kernel - change print*() functions for ipc to generic ipc hook functions.
- used to implement ipc stats tracking code
2011-02-08 13:54:33 +00:00
Gianluca Guida
fa59fc6eb4 Move shared headers in common/include
Headers that will be shared between old includes and NetBSD-like includes
are moved into common/include tree. They are still copied in /usr/include
in 'make includes', so compilation and programs aren't be affected.
2011-02-06 22:59:02 +00:00
Ben Gras
95702f970b kernel - doesn't do lock timings any more 2011-02-04 13:42:17 +00:00
Ben Gras
dc1cc91df1 <ansi.h> -> <minix/ansi.h> 2011-01-28 11:35:02 +00:00
Arun Thomas
6e86430130 Remove code for kernel task stack initialization
We no longer have kernel tasks, so this code is unnecessary
2011-01-27 12:18:33 +00:00
David van Moolenbroek
9c7dcbfec3 Kernel: fix clearing IPC references resulting in system crash 2011-01-18 10:18:08 +00:00
David van Moolenbroek
efca30b081 Kernel: fix notification delivery to non-ANY receivers 2011-01-07 17:04:43 +00:00
David van Moolenbroek
5d8d5e0c3a change bitchunk_t from 16-bit to 32-bit 2010-12-21 10:44:45 +00:00
Arun Thomas
361f377493 Fix multiboot for ACK-built images
Move the profiling buffer to the end of the data segment
2010-12-17 13:47:11 +00:00
David van Moolenbroek
b6f3b7e7f6 Kernel: statistical profiling fixes
- create name entries for forked processes as well;
- create name entries only for system processes.
2010-12-16 09:46:26 +00:00
David van Moolenbroek
a7285dfabc Kernel/RS: fix permission computation with 32+ system processes 2010-12-07 10:32:42 +00:00
Erik van der Kouwe
cbf7d8f735 Fix missing parenthesis (suggested by Antoine Leca) 2010-11-29 08:30:30 +00:00
Ben Gras
d87559f9b9 Fix for objdir feature of BSD make
contributed by Antoine Leca.
2010-11-24 13:44:42 +00:00
Arun Thomas
cfc1fe2ead kernel: Use LIBDIR var in Makefile
Instead of using a hard-coded path, use the LIBDIR variable so
the library path can be overridden.
2010-11-19 10:28:17 +00:00
Tomas Hruby
3ff6f21b51 kernel/debug.c includes u64.h (fix) 2010-11-18 15:12:01 +00:00
Ben Gras
f3e1b1c226 Updated some CLEANFILES macros in Makefiles. 2010-11-17 14:27:23 +00:00
Arun Thomas
f0ab18377d GCC/clang: int64 routines in C 2010-11-12 18:38:10 +00:00
Ben Gras
fd2b22474f update for releases with git. 2010-11-11 02:00:12 +00:00
Arun Thomas
aaaad89244 Use int64 functions consistently
Instead of manipulating the u64_t type directly, use the
ex64hi()/ex64lo()/make64() functions.
2010-11-07 23:35:29 +00:00
Ben Gras
515e8d075f kernel: limit stacktrace depth to 50.
- Unlikely to discard useful information and avoids long
    system lockups on machines configured to print system output to serial.
2010-11-02 21:27:04 +00:00
Tomas Hruby
ac780f36a0 sys_getcpuinfo() 2010-10-26 21:07:50 +00:00
Tomas Hruby
c9bfb13cdb Kernel keeps information about each cpu
- kernel maintains a cpu_info array which contains various
  information about each cpu as filled when each cpu boots

- the information contains idetification, features etc.
2010-10-26 21:07:27 +00:00
Tomas Hruby
9e01a83636 SMP - reduced TLB flushing
- flush TLB of processes only if the page tables has been changed and
  the page tables of this process are already loaded on this cpu which
  means that there might be stale entries in TLB. Until now SMP was
  always flushing TLB to make sure everything is consistent.
2010-10-25 16:21:23 +00:00
Tomas Hruby
5b832396f5 if verbore=1 tell us who registers which irq handler
- a useful piece of information when debugging
2010-10-21 17:07:12 +00:00
Tomas Hruby
98c93e76d7 Zero no more hardwired as BSP apic id
- the BSP apic id is written in the io apic redirection entries to
  deliver the interrupts to BSP
2010-10-21 17:07:07 +00:00
Tomas Hruby
a1eefc013e single shot timer interrupts fix
- accidentaly this wasn't part of the SMP merge and the implementation
  remained uncomplete with the timer keeping ticking periodically

- APIC timer is set for a signel shot and restarted everytime it
  expires. This way we can keep the AP's trully idle

- the timer is restarted a little later before leaving to userspace

- LAPIC_TIMER_ICR is written before LAPIC_LVTTR so the newest value is
  used
2010-10-21 17:07:01 +00:00
Tomas Hruby
ebbc730fc3 spurious and error interrupt apic handlers
- fixed spurious and error interrupt handlers

- not to hog the system the warning isn't reported every time, just
  once every 100 times, similarly for the spurious PIC interrupts
2010-10-19 17:07:21 +00:00
Tomas Hruby
f42b90806a BSP apic id
- BSP apic id used uninitialized causes problems
2010-10-19 17:07:19 +00:00
Tomas Hruby
e6b1a30a26 panic in dummy apic handlers
- as panic can do the same as printf now, let's rather panic when a
  dummy apic interrupt vector handler is hit
2010-10-19 17:07:17 +00:00
Tomas Hruby
2419ab589d Fixed BKL statistics 2010-10-19 17:07:11 +00:00
Tomas Hruby
8145b458d6 A klib.S include fix
- by Antoine Leca
2010-10-15 22:21:01 +00:00
Ben Gras
c521f2a138 kernel: fix idle time accounting. 2010-10-04 19:12:55 +00:00
Tomas Hruby
1786291e32 Watchdog and kernel profiling for AMD
- a different set of MSRs and performance counters is used on AMD

- when initializing NMI watchdog the test for Intel architecture
  performance counters feature only applies to Intel now

- NMI is enabled if the CPU belongs to a family which has the
  performance counters that we use
2010-09-23 14:42:30 +00:00
Tomas Hruby
8eece1c00c CPU type detection
- sometimes the system needs to know precisely on what type of cpu is
  running. The cpu type id detected during arch specific
  initialization and kept in the machine structure for later use.

- as a side-effect the information is exported to userland
2010-09-23 14:42:19 +00:00
Tomas Hruby
ef92583c3a Busy idle loop when profiling
- the Intel architecture cycle counter (performance counter) does not
  count when the CPU is idle therefore we use busy loop instead of
  halting the cpu when there is nothing to schedule

- the downside is that handling interrupts may be accounted as idle
  time if a sample is taken before we get out of the nested trap and
  pick a new process
2010-09-23 10:49:52 +00:00
Tomas Hruby
d2b56f60da sprofile exports kernel sample entries
- in case of kernel hit while proc_ptr is IDLE, account for idle time
  instead of taking kernel sample
2010-09-23 10:49:50 +00:00
Tomas Hruby
87c576584d Internal 64M buffer for profiling
- when profiling is compiled in kernel includes a 64M buffer for
  sample

- 64M is the default used by profile tool as its buffer

- when using nmi profiling it is not possible to always copy sample
  stright to userland as the nmi may (and does) happen in bad moments

- reduces sampling overhead as samples are copied out only when
  profiling stops
2010-09-23 10:49:48 +00:00
Tomas Hruby
e63b85a50b NMI sampling
- if profile --nmi kernel uses NMI watchdog based sampling based on
  Intel architecture performance counters

- using NMI makes kernel profiling possible

- watchdog kernel lockup detection is disabled while sampling as we
  may get unpredictable interrupts in kernel and thus possibly many
  false positives

- if watchdog is not enabled at boot time, profiling enables it and
  turns it of again when done
2010-09-23 10:49:45 +00:00
Tomas Hruby
db12229ce3 New profile protocol
- when kernel profiles a process for the first time it saves an entry
  describing the process [endpoint|name]

- every profile sample is only [endpoint|pc]

- profile utility creates a table of endpoint <-> name relations and
  translates endpoints of samples into names and writing out the
  results to comply with the processing tools

- "task" endpoints like KERNEL are negative thus we must cast it to
  unsigned when hashing
2010-09-23 10:49:39 +00:00
Tomas Hruby
123a968be3 32bit process flags
- we are running out of space in 16bit flags
2010-09-23 10:49:36 +00:00
Ben Gras
82d576c9ca enable_fpu_exception() - only write cr0 if bit isn't already on.
(NMI profiling results indicate this both is relatively expensive and
happens a lot unnecessarily if the fpu is in use.)
2010-09-22 14:31:06 +00:00
Tomas Hruby
2d1c8849d8 Remove unnecessary TLB flushes
- this should be only for SMP
2010-09-22 08:01:36 +00:00
Tomas Hruby
08bf4dec4f Fixed comments in watchdog 2010-09-19 23:23:44 +00:00
Tomas Hruby
e9ecba9fc7 fix - forgotten debug print 2010-09-19 15:54:31 +00:00
Tomas Hruby
a665ae3de1 Userspace scheduling - exporting stats
- contributed by Bjorn Swift

- adds process accounting, for example counting the number of messages
  sent, how often the process was preemted and how much time it spent
  in the run queue. These statistics, along with the current cpu load,
  are sent back to the user-space scheduler in the Out Of Quantum
  message.

- the user-space scheduler may choose to make use of these statistics
  when making scheduling decisions. For isntance the cpu load becomes
  especially useful when scheduling on multiple cores.
2010-09-19 15:52:12 +00:00
Tomas Hruby
13bda81ee0 Fixed FPU for single cpu 2010-09-16 09:51:45 +00:00
Tomas Hruby
72cc01ff48 apic_timer_x
- set the apic_timer_x factor variable to slowdown apic timer in
  virtual machines
2010-09-16 07:18:47 +00:00
Tomas Hruby
4ee139b0be SMP - all process have pagetables
- all processes have private pagetables if CONFIG_SMP is set

- this make possible to safely schedule PM, RS, VFS anywhere
2010-09-15 14:11:30 +00:00
Tomas Hruby
5b8b623765 SMP - lazy FPU
- when a process is migrated to a different CPU it may have an active
  FPU context in the processor registers. We must save it and migrate
  it together with the process.
2010-09-15 14:11:25 +00:00
Tomas Hruby
1f89845bb2 SMP - can boot even if some cpus fail to boot
- EBADCPU is returned is scheduler tries to run a process on a CPU
  that either does not exist or isn't booted

- this change was originally meant to deal with stupid cpuid
  instruction which provides totally useless information about
  hyper-threading and MPS which does not deal with ht at all. ACPI
  provides correct information. If ht is turned off it looks like some
  CPUs failed to boot.  Nevertheless this patch may be handy for
  testing/benchmarking in the future.
2010-09-15 14:11:21 +00:00
Tomas Hruby
421f324baa SMP - Make sure that VM does not change pt of a process while kernel copies 2010-09-15 14:11:19 +00:00
Tomas Hruby
e4283176ae SMP - Force TLB flush before scheduling a process
- this makes sure that each process always run with updated TLB

- this is the simplest way how to achieve the consistency. As it means
  significant performace degradation when not require, this is nto the
  final solution and will be refined
2010-09-15 14:11:17 +00:00
Tomas Hruby
6513d20744 SMP - Process is stopped when VM modifies the page tables
- RTS_VMINHIBIT flag is used to stop process while VM is fiddling with
  its pagetables

- more generic way of sending synchronous scheduling events among cpus

- do the x-cpu smp sched calls only if the target process is runnable.
  If it is not, it cannot be running and it cannot become runnable
  this CPU holds the BKL
2010-09-15 14:11:12 +00:00
Tomas Hruby
906a81a1c7 SMP - runctl() can stop across cpus
- if stopping a process that runs on a different CPU we tell the
  remote cpu to do that
2010-09-15 14:11:09 +00:00
Tomas Hruby
e2701da5a9 SMP - Single shot local timer
- APIC timer always reprogrammed if expired

- timer tick never happens when in kernel => never immediate return
  from userspace to kernel because of a buffered interrupt

- renamed argument to lapic_set_timer_one_shot()

- removed arch_ prefix from timer functions
2010-09-15 14:11:06 +00:00
Tomas Hruby
e87d29171f SMP - Compiles for both single and multi processor again
- this patch adds various fixes as some of the previous patches break
  compilations without CONFIG_SMP being set
2010-09-15 14:11:03 +00:00
Tomas Hruby
454589debd SMP - Print cpu of the process
- adds '4' to print processes assigned to each cpu without printing
  the process it is blocked on (a lightweight '1')
2010-09-15 14:11:01 +00:00
Tomas Hruby
0ac9b6d4cf SMP - trully idle APs
- any cpu can use smp_schedule() to tell another cpu to reschedule

- if an AP is idle, it turns off timer as there is nothing to
  preempt, no need to wakeup just to go back to sleep again

- if a cpu makes a process runnable on an idle cpu, it must wake it up
  to reschedule
2010-09-15 14:10:57 +00:00
Tomas Hruby
387e1835d1 SMP - BSP halts APs before shutting down 2010-09-15 14:10:54 +00:00
Tomas Hruby
311f145bc7 SMP - Balancing run queues for SMP
- it preempts running processes though :( this is not the final
  solution
2010-09-15 14:10:51 +00:00
Tomas Hruby
06b6e5624a SMP - Changed prototype of sys_schedule()
- sys_schedule can change only selected values, -1 means that the
  current value should be kept unchanged. For instance we mostly want
  to change the scheduling quantum and priority but we want to keep
  the process at the current cpu

- RS can hand off its processes to scheduler

- service can read the destination cpu from system.conf

- RS can pass the information farther
2010-09-15 14:10:42 +00:00
Tomas Hruby
c554aef0e1 SMP - BKL statistics
- pressing 'B' on the serial cnsole prints statistics for BKL per cpu.

- 'b' resets the counters

- it presents number of cycles each CPU spends in kernel, how many
  cycyles it spends spinning while waiting for the BKL

- it shows optimistic estimation in how many cases we get the lock
  immediately without spinning. As the test is not atomic the lock may
  be already held by some other cpu before we actually try to acquire
  it.
2010-09-15 14:10:37 +00:00
Tomas Hruby
93b9873a56 SMP - Free PDE slots are split among CPU
- cross-address space copies use these slots to map user memory for
  kernel. This avoid any collisions between CPUs

- well, we only have a single CPU running at a time, this is just to
  be safe for the future
2010-09-15 14:10:36 +00:00
Tomas Hruby
1e273f640e SMP - Scheduler can assign process to a cpu
- machine information contains the number of cpus and the bsp id

- a dummy SMP scheduler which keeps all system processes on BSP and
  all other process on APs. The scheduler remembers how many processes
  are assigned to each CPU and always picks the one with the least
  processes for a new process.
2010-09-15 14:10:33 +00:00
Tomas Hruby
9e12630d75 SMP - APs are fully enabled
- apic_send_ipi() to send inter-processor interrupts (IPIs)

- APIC IPI schedule and halt handlers to signal x-cpu that a cpu shold
  reschedule or halt

- various little changes to let APs run

- no processes are scheduled at the APs and therefore they are idle
  except being interrupted by a timer time to time
2010-09-15 14:10:30 +00:00
Tomas Hruby
d37b7ebc0b SMP - CPU local cycles accounting
- tsc_ctr_switch is made cpu local

- although an x86 specific variable it must be declared globaly as the
  cpulocal implementation does not allow otherwise
2010-09-15 14:10:27 +00:00
Tomas Hruby
67f039540c SMP - proc_ptr and bill_ptr initialization
- they should point somewhere
2010-09-15 14:10:24 +00:00
Tomas Hruby
865e21b884 SMP - CPU local idle stub
- each CPU has its own pseudo idle process and its structure

- idle cycles accounting is agregated when exporting to userspace
2010-09-15 14:10:21 +00:00
Tomas Hruby
fac5fbfdbf SMP - CPU local run queues
- each CPU has its own runqueues

- processes on BSP are put on the runqueues later after a switch to
  the final stack when cpuid works to avoid special cases

- enqueue() and dequeue() use the run queues of the cpu the process is
  assigned to

- pick_proc() uses the local run queues

- printing of per-CPU run queues ('2') on serial console
2010-09-15 14:10:18 +00:00
Tomas Hruby
ad73a4f50c SMP - CPU and CPU mask for processes
- each process has associated information about the cpu it is currently
  scheduled on and the mask of cpus it is allowed to use.
2010-09-15 14:10:16 +00:00
Tomas Hruby
9b6d66c787 SMP - BSP waits until the APs finish their booting
- APs configure local timers

- while configuring local APIC timer the CPUs fiddle with the interrupt
  handlers. As the interrupt table is shared the BSP must not run
2010-09-15 14:10:12 +00:00
Tomas Hruby
b7aed08e65 SMP - Only a single APIC timer handler
- bsp_timer_int_handler() and ap_timer_int_handler() unified into
  timer_int_handler()

- global realtime updated only on BSP
2010-09-15 14:10:09 +00:00
Tomas Hruby
85cca7096f SMP - The slave CPUs turn paging on
- APs wait until BSP turns paging on, it is not possible to safely
  execute any code on APs until we can turn paging on as well as it
  must be done synchronously everywhere

- APs turn paging on but do not continue and wait
2010-09-15 14:10:07 +00:00
Tomas Hruby
6aa26565e6 SMP - Big kernel lock (BKL)
- to isolate execution inside kernel we use a big kernel lock
  implemented as a spinlock

- the lock is acquired asap after entering kernel mode and released as
  late as possible. Only one CPU as a time can execute the core kernel
  code

- measurement son real hw show that the overhead of this lock is close
  to 0% of kernel time for the currnet system

- the overhead of this lock may be as high as 45% of kernel time in
  virtual machines depending on the ratio between physical CPUs
  available and emulated CPUs. The performance degradation is
  significant
2010-09-15 14:10:03 +00:00
Tomas Hruby
a42ab504a0 SMP - Kernel is loaded above 1M by default
- the 16-bit trampoline must be within the first megabyte of physical
  memory thus the smp trampoline is copied explicitly below 1M
2010-09-15 14:10:00 +00:00
Tomas Hruby
62c666566e SMP - We boot APs
- kernel detects CPUs by searching ACPI tables for local apic nodes

- each CPU has its own TSS that points to its own stack. All cpus boot
  on the same boot stack (in sequence) but switch to its private stack
  as soon as they can.

- final booting code in main() placed in bsp_finish_booting() which is
  executed only after the BSP switches to its final stack

- apic functions to send startup interrupts

- assembler functions to handle CPU features not needed for single cpu
  mode like memory barries, HT detection etc.

- new files kernel/smp.[ch], kernel/arch/i386/arch_smp.c and
  kernel/arch/i386/include/arch_smp.h

- 16-bit trampoline code for the APs. It is executed by each AP after
  receiving startup IPIs it brings up the CPUs to 32bit mode and let
  them spin in an infinite loop so they don't do any damage.

- implementation of kernel spinlock

- CONFIG_SMP and CONFIG_MAX_CPUS set by the build system
2010-09-15 14:09:52 +00:00
Tomas Hruby
13a0d5fa5e SMP - Cpu local variables
- most global variables carry information which is specific to the
  local CPU and each CPU must have its own copy

- cpu local variable must be declared in cpulocal.h between
  DECLARE_CPULOCAL_START and DECLARE_CPULOCAL_END markers using
  DECLARE_CPULOCAL macro

- to access the cpu local data the provided macros must be used

	get_cpu_var(cpu, name)
	get_cpu_var_ptr(cpu, name)

	get_cpulocal_var(name)
	get_cpulocal_var_ptr(name)

- using this macros makes future changes in the implementation
  possible

- switching to ELF will make the declaration of cpu local data much
  simpler, e.g.

  CPULOCAL int blah;

  anywhere in the kernel source code
2010-09-15 14:09:46 +00:00
Tomas Hruby
2a2a19e542 proc_init()
- code that initializes proc.c structures removed from main() and placed in
  proc_init() function
2010-09-15 14:09:43 +00:00
Tomas Hruby
ce4fd0c0fb Enable paging - some more code reshuffling 2010-09-15 14:09:41 +00:00
Tomas Hruby
6c3b981cd6 arch proto.h renamed to arch_proto.h
- the file moved to the arch include dir
2010-09-15 14:09:36 +00:00
Ben Gras
2065c9982b include - minor compile fixes (including <ansi.h> in files that use it)
workaround for kernel/debug.h that causes <ansi.h> to be included in mpx.S
indirectly.
2010-09-15 08:47:10 +00:00
Ben Gras
eaa37fd21c make, lib changes to make gcc/clang format libraries in /usr/lib instead of /usr/gnu/lib. 2010-09-13 16:37:02 +00:00
Tomas Hruby
e6ebac015d APIC mode uses IO APICs
- kernel turns on IO APICs if no_apic is _not_ set or is equal 0

- pci driver must use the acpi driver to setup IRQ routing otherwise
  the system cannot work correctly except systems like KVM that use
  only legacy (E)ISA IRQs 0-15
2010-09-07 07:18:11 +00:00
Tomas Hruby
2440ffae49 Kernel exports DSDP and apic_enabled in machine structure
- kernel exports DSDP (the root pointer where ACPI parsing starts) and
  apic_enabled in the machine structure.

- ACPI driver uses DSDP to locate ACPI in memory. acpi_enabled tell
  PCI driver to query ACPI for IRQ routing information.
2010-09-02 15:43:56 +00:00
Tomas Hruby
344e9221ec Kernel supports up to 64 IRQs
- enough for 2 io apics (usually with 24 pins)
2010-09-02 15:43:54 +00:00
Tomas Hruby
45badf4c05 ACPI in kernel
- the ability for kernel to use ACPI tables to detect IO APICs. It is
  the bare minimum the kernel needs to know about ACPI tables.

- it will be used to find out about processors as the MPS tables are
  deprecated by ACPI and not all vendorsprovide them.
2010-09-02 15:43:51 +00:00
Ben Gras
b3c3a1cb1e gcc compiles - add -fno-builtin so that gcc optimisations don't break things.
- kernel compile was broken with gcc as putchar() was added by gcc in
    stacktrace.c
  - add -fno-builtin everywhere to avoid such problems in the future
  - -fno-builtin in kernel now redundant
2010-08-31 16:42:44 +00:00
Erik van der Kouwe
1f2054c89c Shutdown changes for multiboot: CTRL-ALT-DEL resets, panic halts 2010-08-30 19:01:58 +00:00
Erik van der Kouwe
50ca7f7f8f Zero out to three stack dwords to fix boot errors 2010-08-24 12:51:11 +00:00
Arun Thomas
de231a713e Move MIN() and MAX() macros to sys/params.h 2010-08-21 13:10:41 +00:00
Erik van der Kouwe
b9f5e50421 Provide boot image process main functions with a full parameter list, so that bad things don't heppen when using getenv 2010-08-20 11:07:16 +00:00
Arun Thomas
9a21d1a2fd Macros for symbols used in both ASM and C
-The macros take care of prepending the leading underscore when
 necessary.
2010-08-17 16:44:07 +00:00
Tomas Hruby
f7ef192c02 Fixed warning noreturn function returns in arch_system.c 2010-08-06 12:48:26 +00:00
Tomas Hruby
58654acf08 both ack and gcc can compile klib16.S 2010-08-06 12:46:44 +00:00
Tomas Hruby
ac9a7f47bd Missing prototype in pre_init.c
- gcc does not like it
2010-08-06 12:26:26 +00:00
Erik van der Kouwe
25397ef756 Deal all shutdown cases with multiboot as either reset or poweroff depending on their type (contributed by Feiran 'Fam' Zheng) 2010-08-02 14:41:45 +00:00
Erik van der Kouwe
ebec792700 Display fallback message in case poweroff fails (contributed by Feiran 'Fam' Zheng) 2010-08-02 14:40:26 +00:00
Ben Gras
b9cea27497 kernel: deadlock test with endpoints instead of slot numbers, slightly cleaner 2010-07-28 14:14:06 +00:00
Erik van der Kouwe
df0ba02a38 Multiboot support (contributed by Feiran "Fam" Zheng);
keep in mind that GRUB needs to be patched to read MFS for now;
use /boot/image_latest to boot the last compiled image in GRUB
2010-07-23 14:24:34 +00:00
Erik van der Kouwe
f389ad2655 Move sensitive instructions from libc into kernel 2010-07-23 07:12:47 +00:00
Ben Gras
fe343bb002 Make kernel ipc log scripts work for separate ${.OBJDIR}.
contributed by Antoine Leca.
2010-07-22 22:04:37 +00:00
Cristiano Giuffrida
03bb1e5750 Don't panic so easily on unexpected pagefault. 2010-07-20 23:51:34 +00:00
Cristiano Giuffrida
0d984b36ef Get rid of static spare pages after VM startup. 2010-07-20 21:59:27 +00:00
Ben Gras
7f343ed574 kernel: clear MF_CONTEXT_SET on kernel exit. 2010-07-20 17:13:44 +00:00
Ben Gras
c0074d3aa9 kernel: fix case of EAX getting clobbered after sigreturn. 2010-07-20 17:10:09 +00:00
Ben Gras
e0701109ca kernel: make loading kernel in 2nd chunk of memory (at 1MB) the default.
(indicated by flags hardcoded in kernel that the boot monitor
interprets.)
2010-07-19 16:33:49 +00:00
Ben Gras
b05c989298 kernel - prettier output for ipc errors, call names instead of trap numbers 2010-07-16 15:36:29 +00:00
Cristiano Giuffrida
20101b3bab Remove patch leftovers. 2010-07-13 22:40:14 +00:00
Cristiano Giuffrida
f8a8ea0a79 Dynamic configuration in system.conf for boot system services. 2010-07-13 21:11:44 +00:00
Cristiano Giuffrida
8cedace2f5 Scheduling parameters out of the kernel. 2010-07-13 15:30:17 +00:00
Ben Gras
12e9303297 kernel: compile with -mi386 under gcc/clang to not generate SSE code in-kernel. 2010-07-12 10:11:50 +00:00
Cristiano Giuffrida
8427d774b6 RS live update support. 2010-07-09 18:29:04 +00:00
Cristiano Giuffrida
1f8dbed029 RS crash recovery support. 2010-07-06 22:05:21 +00:00
Ben Gras
e920c1e1df kernel: fix main prototype 2010-07-06 12:14:59 +00:00
Ben Gras
f6f814cb02 include, kernel: minor fixes to make compiling and linking work with clang.
(fixing warnings)
2010-07-06 11:59:19 +00:00
Kees van Reeuwijk
0cfdb11450 Repair errors and warnings flagged by llvm. 2010-07-06 11:29:23 +00:00
Ben Gras
42399159da kernel: these asserts from r7657 are not reasonable
will fire if copy needs more than one try, which is legit.
2010-07-05 17:45:16 +00:00
Ben Gras
545054c608 kernel: use MF_KCALL_RESUME instead of RTS_VMREQUEST for memcopy retry.
solves tracker item 499, submitted by Roman Ignatov.
2010-07-04 23:09:24 +00:00
Tomas Hruby
97eb470bee Fix 2010-07-01 12:31:53 +00:00
Tomas Hruby
7920d48156 FPU cleanup
- last reference to MF_USED_FPU removed

- proc_used_fpu() used to test for MF_FPU_INITIALIZED
2010-07-01 12:23:25 +00:00
Erik van der Kouwe
23284ee7bd User-space scheduling for system processes 2010-07-01 08:32:33 +00:00
Cristiano Giuffrida
180358ffb4 Give RS a page table. 2010-06-28 22:07:49 +00:00
Cristiano Giuffrida
06700d05d1 Give RS a page table. 2010-06-28 21:53:37 +00:00
Ben Gras
8379b08845 library function to retrieve kernel proc table and sanity check it 2010-06-28 11:05:15 +00:00
Tomas Hruby
67fa273d00 MF_REPLY_PEND should be removed when sendrec finishes 2010-06-28 08:32:49 +00:00
Kees van Reeuwijk
5eb6f6e922 Fixed a type declaration inconsistency. 2010-06-26 21:13:36 +00:00
Arun Thomas
c0c8d25799 Rename mkfiles from minix.*.mk to bsd.*.mk
Makes things easier for pkgsrc
2010-06-25 18:29:09 +00:00
Erik van der Kouwe
fe07e7c984 Optional IPC logging 2010-06-24 13:31:40 +00:00
Ben Gras
b3a0a2d86f kernel: don't initialize catch_pagefaults at the extern declaration. 2010-06-24 12:23:23 +00:00
Tomas Hruby
76708e9bf4 mini_receive() clean up
- for better readability xpp is substitued by sender

- makes sure that the dequeued sender has p_q_link == NULL and that
  this condition holds when enqueuing the sender again. This is a
  sanity check to make sure that the new sender is not enqueued
  already

- Before this change the dequeued sender's p_q_link may not be NULL
  and it was only set to NULL when enqueued again
2010-06-23 10:36:19 +00:00
Tomas Hruby
6bc21b6992 Cycle counters zeroed after fork for the child 2010-06-18 14:01:34 +00:00
Tomas Hruby
360de619c0 No linear addresses in message delivery
- removes p_delivermsg_lin item from the process structure and code
  related to it

- as the send part, the receive does not need to use the
  PHYS_COPY_CATCH() and umap_local() couple.  

- The address space of the target process is installed before
  delivermsg() is called.

- unlike the linear address, the virtual address does not change when
  paging is turned on nor after fork().
2010-06-11 08:16:10 +00:00
Ben Gras
a6e357da22 kernel: fix assert condition after a caught in-kernel pagefault 2010-06-09 10:59:57 +00:00
Kees van Reeuwijk
826b9590f2 More endpoint_t correctness.
More const correctness.
Other code cleanup.
2010-06-08 14:09:18 +00:00
Arun Thomas
4c10a31440 Remove legacy MM, FS, and FS_PROC_NR macros 2010-06-08 13:58:01 +00:00
Erik van der Kouwe
7bd7946346 Remove redundant macro cproc_addr 2010-06-08 13:38:44 +00:00
Erik van der Kouwe
78186ee5f5 Add endpoint checks in scheduling kernel calls 2010-06-08 12:04:21 +00:00
Ben Gras
a09a8d4f3e kernel: fix for vm_init that triggered assert(ptproc == newptproc)
- zero cr3 in vm_init() to avoid switch_address_space() not doing anything.

 - add vm_stop() to disable paging on shutdown.
2010-06-07 22:21:45 +00:00
Tomas Hruby
cbc9586c13 Lazy FPU
- FPU context is stored only if conflict between 2 FPU users or while
  exporting context of a process to userspace while it is the active
  user of FPU

- FPU has its owner (fpu_owner) which points to the process whose
  state is currently loaded in FPU

- the FPU exception is only turned on when scheduling a process which
  is not the owner of FPU

- FPU state is restored for the process that generated the FPU
  exception. This process runs immediately without letting scheduler
  to pick a new process to resolve the FPU conflict asap, to minimize
  the FPU thrashing and FPU exception hadler execution

- faster all non-FPU-exception kernel entries as FPU state is not
  checked nor saved

- removed MF_USED_FPU flag, only MF_FPU_INITIALIZED remains to signal
  that a process has used FPU in the past
2010-06-07 07:43:17 +00:00
Cristiano Giuffrida
a53514d4a9 Fix range checking in safecopy. 2010-06-04 18:05:38 +00:00
Tomas Hruby
f28acecb78 Removed a buggy assert unintentionally commted in r7044 2010-06-04 10:54:43 +00:00
Ben Gras
2f892aca91 kernel fpu context switching: fix race condition
There seems to have been a broken assumption in the fpu context
restoring code.  It restores the context of the running process, without
guarantee that the current process is the one that will be scheduled.
This caused fpu saving for a different process to be triggered without
fpu hardware being enabled, causing an fpu exception in the kernel. This
practically only shows up with DEBUG_RACE on. Fix my thruby+me.

The fix
 . is to only set the fpu-in-use-by-this-process flag in the
   exception handler, and then take care of fpu restoring when
   actually returning to userspace

And the patch
 . translates fpu saving and restoring to c in arch_system.c,
   getting rid of a juicy chunk of assembly
 . makes osfxsr_feature private to arch_system.c
 . removes most of the arch dependent code from do_sigsend
2010-06-03 11:32:22 +00:00
Kees van Reeuwijk
36e12d5bd8 Use endpoint_t for the destination of mini_send and _syscall, and the
source of mini_receive.

Also some small cleanup.
2010-06-02 21:51:32 +00:00
Kees van Reeuwijk
ed0b81c25c Removed some unused variables and functions. 2010-06-02 19:41:38 +00:00
Tomas Hruby
463be393c2 Gracefull crash if FPU exception in kernel 2010-06-02 13:59:55 +00:00