Commit Graph

146 Commits

Author SHA1 Message Date
Konstantin Belousov
8f4a1f3a83 Bring back the save/restore of the %ds, %es, %fs and %gs registers for
the 32bit images on amd64.

Change the semantic of the PCB_32BIT pcb flag to request the context
switch code to operate on the segment registers. Its previous meaning
of saving or restoring the %gs base offset is assigned to the new
PCB_GS32BIT flag.

FreeBSD 32bit image activator sets the PCB_32BIT flag, while Linux 32bit
emulation sets PCB_32BIT | PCB_GS32BIT.

Reviewed by:	peter
MFC after:	2 weeks
2008-07-30 11:30:55 +00:00
Roman Divacky
7c0cc5f941 Regen.
Approved by:	kib (mentor)
2008-05-13 20:02:26 +00:00
Roman Divacky
4732e446fb Implement robust futexes. Most of the code is modelled after
what Linux does. This is because robust futexes are mostly
userspace thing which we cannot alter. Two syscalls maintain
pointer to userspace list and when process exits a routine
walks this list waking up processes sleeping on futexes
from that list.

Reviewed by:	kib (mentor)
MFC after:	1 month
2008-05-13 20:01:27 +00:00
Roman Divacky
a6d043e30d Implement linux_truncate64() syscall.
Tested by:	Aline de Freitas <aline@riseup.net>
Approved by:	kib (mentor)
2008-04-23 15:56:33 +00:00
Jung-uk Kim
01c3b1b200 Regenerate. 2008-04-16 19:27:36 +00:00
Jung-uk Kim
26833f3f9a Add stubs for syscalls introduced in Linux 2.6.17 kernel.
Some GNU libc version started using them before 2.6.17 was officially out.

MFC after:	3 days
2008-04-16 19:25:39 +00:00
Konstantin Belousov
50ad4fc65c Regenerate 2008-04-08 09:51:19 +00:00
Konstantin Belousov
48b05c3f82 Implement the linux syscalls
openat, mkdirat, mknodat, fchownat, futimesat, fstatat, unlinkat,
    renameat, linkat, symlinkat, readlinkat, fchmodat, faccessat.

Submitted by:	rdivacky
Sponsored by:	Google Summer of Code 2007
Tested by:	pho
2008-04-08 09:45:49 +00:00
Roman Divacky
d8653dd986 Regen. 2008-03-16 16:29:37 +00:00
Roman Divacky
5dfb688191 Implement sched_setaffinity and get_setaffinity using
real cpu affinity setting primitives.

Reviewed by:	jeff
Approved by:	kib (mentor)
2008-03-16 16:27:44 +00:00
Konstantin Belousov
22eca0bf45 Since version 4.3, gcc changed its behaviour concerning the i386/amd64
ABI and the direction flag, that is it now assumes that the direction
flag is cleared at the entry of a function and it doesn't clear once
more if needed. This new behaviour conforms to the i386/amd64 ABI.

Modify the signal handler frame setup code to clear the DF {e,r}flags
bit on the amd64/i386 for the signal handlers.

jhb@ noted that it might break old apps if they assumed DF == 1 would be
preserved in the signal handlers, but that such apps should be rare and
that older versions of gcc would not generate such apps.

Submitted by:	Aurelien Jarno <aurelien aurel32 net>
PR:	121422
Reviewed by:	jhb
MFC after:	2 weeks
2008-03-13 10:54:38 +00:00
Jeff Roberson
6617724c5f Remove kernel support for M:N threading.
While the KSE project was quite successful in bringing threading to
FreeBSD, the M:N approach taken by the kse library was never developed
to its full potential.  Backwards compatibility will be provided via
libmap.conf for dynamically linked binaries and static binaries will
be broken.
2008-03-12 10:12:01 +00:00
Jung-uk Kim
865df544c6 Fix Linux mmap with MAP_GROWSDOWN flag.
Reported by:	Andriy Gapon (avg at icyb dot net dot ua)
Tested by:	Andriy Gapon (avg at icyb dot net dot ua)
Pointyhat:	me
MFC after:	3 days
2008-02-11 19:35:03 +00:00
Konstantin Belousov
96a2b63525 Fill in cr2 in the signal context from ksi->ksi_addr.
Together with the sys/i386/i386/trap.c rev. 1.306 it fixes the PR.

Submitted by:	rdivacky
Suggested by:	jhb
Sponsored by:	Google Summer of Code 2007
PR:		kern/77710
Approved by:	re (kensmith)
2007-09-20 13:46:26 +00:00
David Malone
3ab8526963 The kernel version of Linux statfs64 is actually supposed to take
3 arguments, but we had forgotten the second argument. Also make the
Linux statfs64 struct depend on the architecture because it has an
extra 4 bytes padding on amd64 compared to i386.

The three argument fix is from David Taylor, the struct statfs64
stuff is my fault. With this patch I can install i386 Linux matlab
on an amd64 machine.

Submitted by: David Taylor <davidt_at_yadt.co.uk>
Approved by: re (kensmith)
2007-09-18 19:50:33 +00:00
Konstantin Belousov
0e6ed4feab Regenerate.
Approved by:	re (kensmith)
2007-08-28 12:36:23 +00:00
Konstantin Belousov
b6e645c90f Implement fake linux sched_getaffinity() syscall to enable java to work
with Linux 2.6 emulation. This shall be reimplemented once FreeBSD gets
native scheduler affinity syscalls.

Submitted by:	rdivacky
Reviewed by:	jkim
Sponsored by:	Google Summer of Code 2007
Approved by:	re (kensmith)
2007-08-28 12:26:35 +00:00
John Baldwin
59d8f3ff08 Fix a couple of issues with the stack limit for 32-bit processes on 64-bit
kernels exposed by the recent fixes to resource limits for 32-bit processes
on 64-bit kernels:
- Let ABIs expose their maximum stack size via a new pointer in sysentvec
  and use that in preference to maxssiz during exec() rather than always
  using maxssiz for all processses.
- Apply the ABI's limit fixup to the previous stack size when adjusting
  RLIMIT_STACK to determine if the existing mapping for the stack needs to
  be grown or shrunk (as well as how much it should be grown or shrunk).

Approved by:	re (kensmith)
2007-07-12 18:01:31 +00:00
Peter Wemm
79d5bdcca5 Don't add the 'pad' argument to the mmap/truncate/etc syscalls.
Submitted by: kensmith
Approved by: re (kensmith)
2007-07-04 23:06:43 +00:00
Jeff Roberson
982d11f836 Commit 14/14 of sched_lock decomposition.
- Use thread_lock() rather than sched_lock for per-thread scheduling
   sychronization.
 - Use the per-process spinlock rather than the sched_lock for per-process
   scheduling synchronization.

Tested by:      kris, current@
Tested on:      i386, amd64, ULE, 4BSD, libthr, libkse, PREEMPTION, etc.
Discussed with: kris, attilio, kmacy, jhb, julian, bde (small parts each)
2007-06-05 00:00:57 +00:00
Konstantin Belousov
1c182de9a9 Move futex support code from <arch>/support.s into linux compat directory.
Implement all futex atomic operations in assembler to not depend on the
fuword() that does not allow to distinguish between -1 and failure return.
Correctly return 0 from atomic operations on success.

In collaboration with:	rdivacky
Tested by:	Scot Hetzel <swhetzel gmail com>, Milos Vyletel <mvyletel mzm cz>
Sponsored by:	Google SoC 2007
2007-05-23 08:33:06 +00:00
John Baldwin
19059a13ed Rework the support for ABIs to override resource limits (used by 32-bit
processes under 64-bit kernels).  Previously, each 32-bit process overwrote
its resource limits at exec() time.  The problem with this approach is that
the new limits affect all child processes of the 32-bit process, including
if the child process forks and execs a 64-bit process.  To fix this, don't
ovewrite the resource limits during exec().  Instead, sv_fixlimits() is
now replaced with a different function sv_fixlimit() which asks the ABI to
sanitize a single resource limit.  We then use this when querying and
setting resource limits.  Thus, if a 32-bit process sets a limit, then
that new limit will be inherited by future children.  However, if the
32-bit process doesn't change a limit, then a future 64-bit child will
see the "full" 64-bit limit rather than the 32-bit limit.

MFC is tentative since it will break the ABI of old linux.ko modules (no
other modules are affected).

MFC after:	1 week
2007-05-14 22:40:04 +00:00
Alexander Kabaev
ec69a8a6d2 Do not dereference linux_to_bsd_signal[-1] if userland has
passed zero as exit signal.

GCC 4.2 changes the kernel data segment layout not to have 0
in that memory location. This code ran by luck before and now
the luck has run out.
2007-05-11 01:25:51 +00:00
Jung-uk Kim
f1753e0585 Fix style(9) and comments.
Submitted by:	Scot Hetzel (swhetzel at gmail dot com)
2007-04-18 20:12:05 +00:00
Jung-uk Kim
d477452eb3 style(9) says sizeof's are not be followed by a space. Fix them. 2007-04-18 18:11:32 +00:00
Jung-uk Kim
86a0e5dbb6 Implement settimeofday() for Linuxulator/amd64.
Submitted by:	Scot Hetzel (swhetzel at gmail dot com)
2007-04-18 18:08:12 +00:00
Jung-uk Kim
357afa7113 MFP4: Turn emul_lock into a mutex.
Submitted by:	rdivacky
2007-04-02 18:38:13 +00:00
Jung-uk Kim
b5def2b6b5 MFP4: Fix style(9) nits and grammar in comments. 2007-03-30 17:27:13 +00:00
Jung-uk Kim
5e397f16cd MFP4: 114193, 114194
Dont "return" in linux_clone() after we forked the new process in a case
of problems.  Move the copyout of p2->p_pid outside the emul_lock coverage.

Submitted by:	Roman Divacky
2007-03-30 17:16:51 +00:00
Jung-uk Kim
3a33908404 Regen for set_thread_area. 2007-03-30 00:08:21 +00:00
Jung-uk Kim
9c5b213e51 MFP4: Linux set_thread_area syscall (aka TLS) support for amd64.
Initial version was submitted by Divacky Roman and mostly rewritten by me.

Tested by:	emulation
2007-03-30 00:06:21 +00:00
Julian Elischer
6734f35eac Implement the openat() linux syscall
Submitted by:	Roman Divacky (rdivacky@)
MFC after:	2 weeks
2007-03-29 02:11:46 +00:00
Jung-uk Kim
a4e3bad794 MFP4: 115220, 115222
- Fix style(9) and reduce diff between amd64 and i386.
- Prefix Linuxulator macros with LINUX_ to prevent future collision.
2007-03-02 00:08:47 +00:00
Jung-uk Kim
6a5964d385 MFP4: 115094
Linux does not check file descriptor when MAP_ANONYMOUS is set.
This should fix recent LTP test regressions.

Reported by:	Scot Hetzel (swhetzel at gmail dot com)
		netchild
2007-02-27 02:08:01 +00:00
Alexander Leidinger
802e08a360 Partial MFp4 of 114977:
Whitespace commit: Fix grammar, spelling and punctuation.

Submitted by:	"Scot Hetzel" <swhetzel@gmail.com>
2007-02-24 16:49:25 +00:00
Jung-uk Kim
4d93342633 Fix accidental removal of an empty line from the previous commit. 2007-02-15 01:20:43 +00:00
Jung-uk Kim
da351821f7 Regen. 2007-02-15 01:15:31 +00:00
Jung-uk Kim
1e5ed8c1c2 MFP4: 113033
Port iopl(2) from i386.  This fixes LTP iopl01 and iopl02 on amd64.
2007-02-15 01:13:36 +00:00
Jung-uk Kim
10931a467a MFP4: 113025, 113146, 113177, 113203, 113500, 113546, 113570
- PROT_READ, PROT_WRITE, or PROT_EXEC implies PROT_READ and PROT_EXEC.
Linux/ia64's i386 emulation layer does this and it complies with Linux
header files.  This fixes mmap05 LTP test case on amd64.
- Do not adjust stack size when failure has occurred.
- Synchronize i386 mmap/mprotect with amd64.
2007-02-15 00:54:40 +00:00
Konstantin Belousov
d0b2365eec Introduce some more SO_ option equivalents from Linux to FreeBSD.
The msg variable in linux_recvmsg() was not initialized.
Copy it from userspace.

Submitted by: rdivacky
2007-02-01 13:36:19 +00:00
Konstantin Belousov
a9ccaccfc3 Fix LOR that occurs because proctree_lock was acquired while holding
emuldata lock by moving the code upwards outside the emul_lock coverage.

Submitted by: rdivacky
2007-02-01 13:27:52 +00:00
Konstantin Belousov
84fbdf86b3 MFi386: Use LINUX_SIG_VALID macro.
Submitted by: rdivacky
2007-02-01 13:24:40 +00:00
Jeff Roberson
f0393f063a - Remove setrunqueue and replace it with direct calls to sched_add().
setrunqueue() was mostly empty.  The few asserts and thread state
   setting were moved to the individual schedulers.  sched_add() was
   chosen to displace it for naming consistency reasons.
 - Remove adjustrunqueue, it was 4 lines of code that was ifdef'd to be
   different on all three schedulers where it was only called in one place
   each.
 - Remove the long ifdef'd out remrunqueue code.
 - Remove the now redundant ts_state.  Inspect the thread state directly.
 - Don't set TSF_* flags from kern_switch.c, we were only doing this to
   support a feature in one scheduler.
 - Change sched_choose() to return a thread rather than a td_sched.  Also,
   rely on the schedulers to return the idlethread.  This simplifies the
   logic in choosethread().  Aside from the run queue links kern_switch.c
   mostly does not care about the contents of td_sched.

Discussed with:	julian

 - Move the idle thread loop into the per scheduler area.  ULE wants to
   do something different from the other schedulers.

Suggested by:	jhb

Tested on:	x86/amd64 sched_{4BSD, ULE, CORE}.
2007-01-23 08:46:51 +00:00
Alexander Leidinger
d071f5048c MFp4 (113077, 113083, 113103, 113124, 113097):
Dont expose em->shared to the outside world before its properly
	initialized. Might not affect anything but its at least a better
	coding style.

	Dont expose em via p->p_emuldata until its properly initialized.
	This also enables us to get rid of some locking and simplify the
	code because we are workin on a local copy.

	In linux_fork and linux_vfork create the process in stopped state
	to be sure that the new process runs with fully initialized emuldata
	structure [1]. Also fix the vfork (both in linux_clone and linux_vfork)
	race that could result in never woken up process [2].

Reported by:	Scot Hetzel	[1]
Suggested by:	jhb		[2]
Reviewed by:	jhb (at least some important parts)
Submitted by:	rdivacky
Tested by:	Scot Hetzel (on amd64)

Change 2 comments (in the new code) to comply to style(9).

Suggested by:	jhb
2007-01-20 14:58:59 +00:00
Alexander Leidinger
973ac082f8 MFp4 (112893):
Make linux_vfork() actually work. This enables make to work again with 2.6.
It also fixes the LTP vfork tests.

Submitted by:	rdivacky
2007-01-14 16:20:37 +00:00
Alexander Leidinger
1c65504ca8 MFp4 (112498):
Rename the locking flags to EMUL_DOLOCK and EMUL_DONTLOCK to prevent confusion.

Submitted by:	rdivacky
2007-01-07 19:00:38 +00:00
Alexander Leidinger
4f383e20a9 MFi386 rev 1.56:
Bring the linux mmap code more into line with how linux (2.4.x) behaves.

Tested by:	Scot Hetzel <swhetzel@gmail.com> on amd64 without PROT_EXEC

Additionally to the i386 version always use PROT_EXEC in the mapping like the
previous version of the amd64 code did. We need to examinate this further to
decide what the right thing to do is. For now this fixes several problems in
the LTP test runs and should behave regarding PROT_EXEC like before.
2007-01-06 15:58:34 +00:00
Alexander Leidinger
99e9dcf022 regen after addition of linux_utimes and linux_rt_sigtimedwait 2006-12-31 13:20:31 +00:00
Alexander Leidinger
c9447c7551 MFp4 (111746, 108671, 108945, 112352):
- add linux utimes syscall [1]
 - add linux rt_sigtimedwait syscall [2]

Submitted by:	"Scot Hetzel" <swhetzel@gmail.com> [1]
Submitted by:	Bruce Becker <hostmaster@whois.gts.net> [2]
PR:		93199 [2]
2006-12-31 13:16:00 +00:00
Robert Watson
e9e1341c06 Regenerate. 2006-12-29 01:17:09 +00:00