Commit graph

766 commits

Author SHA1 Message Date
Ben Gras
b41df2eb0d kernel: mon_return cleanup
cleanup of boot monitor related code.
2012-04-25 17:59:43 +02:00
Ben Gras
a149be43fc use linker to align fpu state save area 2012-04-19 15:06:47 +02:00
Ben Gras
53002f6f6c recognize and execute dynamically linked executables
. generalize libexec slightly to get some more necessary information
	  from ELF files, e.g. the interpreter
	. execute dynamically linked executables when exec()ed by VFS
	. switch to netbsd variant of elf32.h exclusively, solves some
	  conflicting headers
2012-04-16 00:41:42 +00:00
Ben Gras
927b9ef243 kernel: align gdt and idt base addresses
patch my fdmanana:
As recommended by the Intel 64 and IA-32 Architectures Developer's
Manual Volume 3A, the GDT and IDT base addresses should be aligned on an
8 byte boundary to yield better processor performance.
2012-04-15 20:41:36 +02:00
Ben Gras
8c4cdbd3c5 import genassym and use it for sconst.h in kernel 2012-03-31 15:29:53 +02:00
David van Moolenbroek
fa805ebd1e Kernel/servers/drivers: resolve a few warnings
Flagged by clang 3.1.
2012-03-30 16:55:06 +02:00
Arun Thomas
b0666ba6b6 kernel: Remove unnecessary ACK conditionals 2012-03-29 13:29:09 +02:00
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