Commit Graph

52 Commits

Author SHA1 Message Date
Konstantin Belousov
99b7f1a10b Adapt linux emulation to use cv for vfork wait.
Submitted by:	Takahiro Kurosawa <takahiro.kurosawa gmail com>
PR:	kern/131506
2009-02-18 16:11:39 +00:00
Konstantin Belousov
41f53a3665 Fix iovec32 for linux32/amd64.
Add a custom version of copyiniov() to deal with the 32-bit iovec
pointers from userland (to be used later).

Adjust prototypes for linux_readv() and linux_writev() to use new
l_iovec32 definition and to match actual linux code. In particular,
use ulong for fd (why ?).

Submitted by:	dchagin
2008-11-29 14:55:24 +00:00
Ed Schouten
ab0d10f68e Several cleanups related to pipe(2).
- Use `fildes[2]' instead of `*fildes' to make more clear that pipe(2)
  fills an array with two descriptors.

- Remove EFAULT from the manual page. Because of the current calling
  convention, pipe(2) raises a segmentation fault when an invalid
  address is passed.

- Introduce kern_pipe() to make it easier for binary emulations to
  implement pipe(2).

- Make Linux binary emulation use kern_pipe(), which means we don't have
  to recover td_retval after calling the FreeBSD system call.

Approved by:	rdivacky
Discussed on:	arch
2008-11-11 14:55:59 +00:00
Konstantin Belousov
3bd5e467b2 The pcb_gs32p should be per-cpu, not per-thread pointer. This is
location in GDT where the segment descriptor from pcb_gs32sd is
copied, and the location is in GDT local to CPU.

Noted and reviewed by:	peter
MFC after:	1 week
2008-09-08 09:59:05 +00:00
Konstantin Belousov
7b1608fde1 In linux_set_thread_area(), mark pcb as PCB_GS32BIT. This was missed
when r180992 was committed.

Reviewed by:	peter
MFC after:	1 week
2008-09-08 09:09:23 +00:00
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
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
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
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
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
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
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
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
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
Jung-uk Kim
77424f4177 MFP4: 109655
- Move linux_nanosleep() from src/sys/amd64/linux32/linux32_machdep.c to
src/sys/compat/linux/linux_time.c.
- Validate timespec ranges before use as Linux kernel does.
- Fix l_timespec structure.
- Clean up style(9) nits.
2006-12-20 20:17:35 +00:00
Alexander Leidinger
0a62e03542 MFP4 (106538 + 106541):
Implement CLONE_VFORK. This fixes the clone05 LTP test.

Submitted by:	rdivacky
2006-10-15 13:39:40 +00:00
Alexander Leidinger
2482245b0c Revert my previous commit, I mismerged this to the wrong place.
Pointy hat to:	netchild
2006-10-15 13:30:45 +00:00
Alexander Leidinger
21aed094a9 MFP4 (106541): Fix the clone05 test in the LTP.
Submitted by:	rdivacky
2006-10-15 13:25:23 +00:00
Alexander Leidinger
4b3583a354 MFP4 (107144[1]): Implement CLONE_FS on i386[1] and amd64.
Submitted by:	rdivacky	[1]
2006-10-15 13:22:14 +00:00
Poul-Henning Kamp
f645b0b51c First part of a little cleanup in the calendar/timezone/RTC handling.
Move relevant variables to <sys/clock.h> and fix #includes as necessary.

Use libkern's much more time- & spamce-efficient BCD routines.
2006-10-02 12:59:59 +00:00
Alexander Leidinger
4038a816f8 MFi386 parts of rev 1.55 (modulo real MD parts):
- implement CLONE_PARENT semantic
 - lock proc in the currently disabled part of CLONE_THREAD

Submitted by:	rdivacky
2006-08-28 13:09:24 +00:00
Alexander Leidinger
40f734dd0d Emulate what vfork does instead of using it in linux_vfork. This way
we can do the stuff we need to do with linux processes at fork and
don't panic the kernel at exit of the child.

Submitted by:	rdivacky
Tested with:	tst-vfork* (glibc regression tests)
Tested by:	netchild
2006-08-25 11:59:56 +00:00
Alexander Leidinger
1a28c0df09 Sync the MI parts for amd64 with i386 and remove the corresponding special
handling for amd64 in the common code. The MD parts for amd64 are still
outstanding, but at least this fixes some panics on amd64.

Sponsored by:	Google SoC 2006
Submitted by:	rdivacky
Tested by:	bsam
2006-08-20 13:50:27 +00:00
Alexander Leidinger
0eef2f8a4e Style fixes to comments.
Sponsored by:	Google SoC 2006
Submitted by:	rdivacky
Noticed by:	jhb, ssouhlal
2006-08-16 18:54:51 +00:00
Alexander Leidinger
9b44bfc556 Add the linux 2.6.x stuff (not used by default!):
- TLS - complete
 - pid/tid mangling - complete
 - thread area - complete
 - futexes - complete with issues
 - clone() extension - complete with some possible minor issues
 - mq*/timer*/clock* stuff - complete but untested and the mq* stuff is
   disabled when not build as part of the kernel with native FreeBSD mq*
   support (module support for this will come later)

Tested with:
 - linux-firefox - works, tested
 - linux-opera - works, tested
 - linux-realplay - doesnt work, issue with futexes
 - linux-skype - doesnt work, issue with futexes
 - linux-rt2-demo - works, tested
 - linux-acroread - doesnt work, unknown reason (coredump) and sometimes
   issue with futexes
 - various unix utilities in linux-base-gentoo3 and linux-base-fc4:
   everything tried worked

On amd64 not everything is supported like on i386, the catchup is planned for
later when the remaining bugs in the new functions are fixed.

To test this new stuff, you have to run
	sysctl compat.linux.osrelease=2.6.16
to switch back use
	sysctl compat.linux.osrelease=2.4.2

Don't switch while running a linux program, strange things may or may not
happen.

Sponsored by:			Google SoC 2006
Submitted by:			rdivacky
Some suggestions/help by:	jhb, kib, manu@NetBSD.org, netchild
2006-08-15 12:54:30 +00:00
Stephan Uphoff
68ff3c2445 Fix exec_map resource leaks.
Tested by: kris@
2006-03-08 20:21:54 +00:00
John Baldwin
8917b8d28c - Always call exec_free_args() in kern_execve() instead of doing it in all
the callers if the exec either succeeds or fails early.
- Move the code to call exit1() if the exec fails after the vmspace is
  gone to the bottom of kern_execve() to cut down on some code duplication.
2006-02-06 22:06:54 +00:00
John Baldwin
de1c01ad37 Correct the amount of data to allocate in these local copies of
exec_copyin_strings() to catch up to rev 1.266 of kern_exec.c.  This fixes
panics on amd64 with compat binaries since exec_free_args() was freeing
more memory than these functions were allocating and the mismatch could
cause memory to be freed out from under other concurrent execs.

Approved by:	re (scottl)
2005-06-24 17:41:28 +00:00
John Baldwin
0d49a5c910 Fix a change in a debug printf I missed in an earlier commit. 2005-04-05 15:28:06 +00:00
John Baldwin
3dde27da5e - Use a custom version of copyinuio() to implement readv/writev using
kern_readv/writev.
- Use kern_sched_rr_get_interval() rather than the stackgap.
2005-03-31 22:57:21 +00:00
John Baldwin
db8a98353d - Fix some sign extension problems with implicit 32 to 64 bit conversions.
- Fix the mmap2() wrapper to not truncate high addresses.

Submitted by:	Christian Zander
2005-03-31 22:47:18 +00:00
John Baldwin
1d15fdd97b - Add a custom version of exec_copyin_args() to deal with the 32-bit
pointers in argv and envv in userland and use that together with
  kern_execve() and exec_free_args() to implement linux_execve() for the
  amd64/linux32 ABI without using the stackgap.
- Implement linux_nanosleep() using the recently added kern_nanosleep().
- Use linux_emul_convpath() instead of linux_emul_find() in
  exec_linux_imgact_try().

Tested by:	cokane
Silence on:	amd64
2005-02-18 18:51:59 +00:00
John Baldwin
78c85e8dfc Rework how we store process times in the kernel such that we always store
the raw values including for child process statistics and only compute the
system and user timevals on demand.

- Fix the various kern_wait() syscall wrappers to only pass in a rusage
  pointer if they are going to use the result.
- Add a kern_getrusage() function for the ABI syscalls to use so that they
  don't have to play stackgap games to call getrusage().
- Fix the svr4_sys_times() syscall to just call calcru() to calculate the
  times it needs rather than calling getrusage() twice with associated
  stackgap, etc.
- Add a new rusage_ext structure to store raw time stats such as tick counts
  for user, system, and interrupt time as well as a bintime of the total
  runtime.  A new p_rux field in struct proc replaces the same inline fields
  from struct proc (i.e. p_[isu]ticks, p_[isu]u, and p_runtime).  A new p_crux
  field in struct proc contains the "raw" child time usage statistics.
  ruadd() has been changed to handle adding the associated rusage_ext
  structures as well as the values in rusage.  Effectively, the values in
  rusage_ext replace the ru_utime and ru_stime values in struct rusage.  These
  two fields in struct rusage are no longer used in the kernel.
- calcru() has been split into a static worker function calcru1() that
  calculates appropriate timevals for user and system time as well as updating
  the rux_[isu]u fields of a passed in rusage_ext structure.  calcru() uses a
  copy of the process' p_rux structure to compute the timevals after updating
  the runtime appropriately if any of the threads in that process are
  currently executing.  It also now only locks sched_lock internally while
  doing the rux_runtime fixup.  calcru() now only requires the caller to
  hold the proc lock and calcru1() only requires the proc lock internally.
  calcru() also no longer allows callers to ask for an interrupt timeval
  since none of them actually did.
- calcru() now correctly handles threads executing on other CPUs.
- A new calccru() function computes the child system and user timevals by
  calling calcru1() on p_crux.  Note that this means that any code that wants
  child times must now call this function rather than reading from p_cru
  directly.  This function also requires the proc lock.
- This finishes the locking for rusage and friends so some of the Giant locks
  in exit1() and kern_wait() are now gone.
- The locking in ttyinfo() has been tweaked so that a shared lock of the
  proctree lock is used to protect the process group rather than the process
  group lock.  By holding this lock until the end of the function we now
  ensure that the process/thread that we pick to dump info about will no
  longer vanish while we are trying to output its info to the console.

Submitted by:	bde (mostly)
MFC after:	1 month
2004-10-05 18:51:11 +00:00
Julian Elischer
2630e4c90c Give setrunqueue() and sched_add() more of a clue as to
where they are coming from and what is expected from them.

MFC after:	2 days
2004-09-01 02:11:28 +00:00
John Baldwin
ef36ad6921 Correct the arguments to kern_sigaltstack() as they were reversed.
PR:		kern/68079
Submitted by:	Georg-W. Koltermann gwk at rahn-koltermann dot de
2004-08-24 20:52:52 +00:00