Commit Graph

494 Commits

Author SHA1 Message Date
Matthew N. Dodd
73c730a694 Add support for O_NOFOLLOW and O_DIRECT to Linux fcntl() F_GETFL/F_SETFL. 2005-04-13 04:31:43 +00:00
John Baldwin
98df9218da - Change the vm_mmap() function to accept an objtype_t parameter specifying
the type of object represented by the handle argument.
- Allow vm_mmap() to map device memory via cdev objects in addition to
  vnodes and anonymous memory.  Note that mmaping a cdev directly does not
  currently perform any MAC checks like mapping a vnode does.
- Unbreak the DRM getbufs ioctl by having it call vm_mmap() directly on the
  cdev the ioctl is acting on rather than trying to find a suitable vnode
  to map from.

Reviewed by:	alc, arch@
2005-04-01 20:00:11 +00:00
Maxim Sobolev
ecab0de7c1 Regen after addition of linux_nosys handler. 2005-03-07 00:23:58 +00:00
Maxim Sobolev
e3478fe000 Handle unimplemented syscall by instantly returning ENOSYS instead of sending
signal first and only then returning ENOSYS to match what real linux does.

PR:		kern/74302
Submitted by:	Travis Poppe <tlp@LiquidX.org>
2005-03-07 00:18:06 +00:00
Maxim Sobolev
4b1783363f In linux emulation layer try to detect attempt to use linux_clone() to
create kernel threads and call rfork(2) with RFTHREAD flag set in this case,
which puts parent and child into the same threading group. As a result
all threads that belong to the same program end up in the same threading
group.

This is similar to what linuxthreads port does, though in this case we don't
have a luxury of having access to the source code and there is no definite
way to differentiate linux_clone() called for threading purposes from other
uses, so that we have to resort to heuristics.

Allow SIGTHR to be delivered between all processes in the same threading
group previously it has been blocked for s[ug]id processes.

This also should improve locking of the same file descriptor from different
threads in programs running under linux compat layer.

PR:			kern/72922
Reported by:		Andriy Gapon <avg@icyb.net.ua>
Idea suggested by:	rwatson
2005-03-03 16:57:55 +00:00
John Baldwin
0311233ecc Use linux_emul_convpath() rather than linux_emul_find() as
linux_emul_find() is going away.
2005-02-07 18:37:51 +00:00
John Baldwin
d9e9747163 Use the LCONVPATHEXIST() macro rather than it's exact expansion to be
consistent.
2005-02-07 18:37:13 +00:00
David Schultz
2a51b9b0aa When running Linux binaries, set up the initial FPU state as Linux
would.

PR:	28966
2005-02-06 17:29:20 +00:00
Maxim Sobolev
610ecfe035 o Split out kernel part of execve(2) syscall into two parts: one that
copies arguments into the kernel space and one that operates
  completely in the kernel space;

o use kernel-only version of execve(2) to kill another stackgap in
  linuxlator/i386.

Obtained from:  DragonFlyBSD (partially)
MFC after:      2 weeks
2005-01-29 23:12:00 +00:00
Maxim Sobolev
84569dff34 o Move copyin()/copyout() out of i386_{get,set}_ldt() and
i386_{get,set}_ioperm() and make those APIs visible in the kernel namespace;

o use i386_{get,set}_ldt() and i386_{get,set}_ioperm() instead of sysarch()
  in the linuxlator, which allows to kill another two stackgaps.

MFC after:	2 weeks
2005-01-26 13:59:46 +00:00
Warner Losh
86cb007f9f /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
David Schultz
d3adf76902 Axe the semblance of support for PECOFF and Linux a.out core dumps. 2004-11-27 06:46:45 +00:00
David Schultz
0ef5c36ff1 Maintain the broken state of backwards compatibilty for a.out (and
PECOFF!) core dumps.  None of the old versions of gdb I tried were
able to read a.out core dumps before or after this change.

Reviewed by:	arch@
2004-11-20 02:32:04 +00:00
David Schultz
46ec41ecb4 Fix the following race:
1. Process p1 is currently being swapped in.
  2. Process p2 calls linux_ptrace(PTRACE_GETFPXREGS, p1_pid, ...)
  3. After acquiring a reference to FIRST_THREAD_IN_PROC(p1),
     p2 blocks in faultin() while p1 finishes being swapped in.
     This means p2 won't get back the lock on p1 until after p1's
     threads are runnable.
  4. After p1 is swapped in, the first thread in p1 exits.
  5. p2 now uses its dangling reference to p1's first thread.
2004-10-01 05:01:00 +00:00
Doug Rabson
bd263739c1 Regen. 2004-09-06 09:33:30 +00:00
Doug Rabson
1bc85c0dea Add a few stub syscalls to get TransGaming's winex a bit closer to
working.
2004-09-06 09:32:59 +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
John Baldwin
8a7aa72dec Regenerate after fcntl() wrappers were marked MP safe. 2004-08-24 20:24:34 +00:00
John Baldwin
2ca25ab53e Fix the ABI wrappers to use kern_fcntl() rather than calling fcntl()
directly.  This removes a few more users of the stackgap and also marks
the syscalls using these wrappers MP safe where appropriate.

Tested on:	i386 with linux acroread5
Compiled on:	i386, alpha LINT
2004-08-24 20:21:21 +00:00
Tim J. Robbins
0e73a96209 Add a new type, l_uintptr_t, which is an unsigned integer type with the
same width as a pointer under Linux. Add two new macros, PTRIN and PTROUT,
which convert between l_uintptr_t and native pointers.
2004-08-16 07:05:44 +00:00
Poul-Henning Kamp
3e019deaed Do a pass over all modules in the kernel and make them return EOPNOTSUPP
for unknown events.

A number of modules return EINVAL in this instance, and I have left
those alone for now and instead taught MOD_QUIESCE to accept this
as "didn't do anything".
2004-07-15 08:26:07 +00:00
Stefan Farfeleder
5908d366fb Consistently use __inline instead of __inline__ as the former is an empty macro
in <sys/cdefs.h> for compilers without support for inline.
2004-07-04 16:11:03 +00:00
David E. O'Brien
13a0a973c6 Add casts so all these quantities are a constant type. 2004-06-24 02:24:39 +00:00
Tim J. Robbins
f99619a0dc Change the types of vn_rdwr_inchunks()'s len and aresid arguments to
size_t and size_t *, respectively. Update callers for the new interface.
This is a better fix for overflows that occurred when dumping segments
larger than 2GB to core files.
2004-06-05 02:18:28 +00:00
Bruce M Simpson
cffd5a3eb4 Use the BSD madvise() syscall implementation for Linux binary emulation,
instead of treating it as an unimplemented syscall. This appears to make
StarOffice 7.0 Linux binaries work according to submitter; also tested
with nvidia driver by submitter.

Submitted by:	Matthias Schuendehuette
2004-03-28 21:43:27 +00:00
John Baldwin
e5592f4dd9 Regenerate. 2004-03-15 22:44:35 +00:00
John Baldwin
216db4ad00 - Mark ABI syscalls that call wait4() MP safe as recent changes to
the kernel wait4() made these all panic() implementations otherwise.
- The i386 linux_ptrace() syscall is MP safe.  Alpha was already marked
  MP safe.
2004-03-15 22:43:49 +00:00
John Baldwin
0804ed5acc Regen. 2004-02-04 22:00:44 +00:00
John Baldwin
c3b612d935 The following compat syscalls are now mpsafe: linux_getrlimit(),
linux_setrlimit(), linux_old_getrlimit(), osf1_getrlimit(),
osf1_setrlimit(), svr4_sys_ulimit(), svr4_sys_setrlimit(),
svr4_sys_getrlimit(), svr4_sys_setrlimit64(), svr4_sys_getrlimit64(),
ibcs2_sysconf(), and ibcs2_ulimit().
2004-02-04 21:57:00 +00:00
John Baldwin
91d5354a2c Locking for the per-process resource limits structure.
- struct plimit includes a mutex to protect a reference count.  The plimit
  structure is treated similarly to struct ucred in that is is always copy
  on write, so having a reference to a structure is sufficient to read from
  it without needing a further lock.
- The proc lock protects the p_limit pointer and must be held while reading
  limits from a process to keep the limit structure from changing out from
  under you while reading from it.
- Various global limits that are ints are not protected by a lock since
  int writes are atomic on all the archs we support and thus a lock
  wouldn't buy us anything.
- All accesses to individual resource limits from a process are abstracted
  behind a simple lim_rlimit(), lim_max(), and lim_cur() API that return
  either an rlimit, or the current or max individual limit of the specified
  resource from a process.
- dosetrlimit() was renamed to kern_setrlimit() to match existing style of
  other similar syscall helper functions.
- The alpha OSF/1 compat layer no longer calls getrlimit() and setrlimit()
  (it didn't used the stackgap when it should have) but uses lim_rlimit()
  and kern_setrlimit() instead.
- The svr4 compat no longer uses the stackgap for resource limits calls,
  but uses lim_rlimit() and kern_setrlimit() instead.
- The ibcs2 compat no longer uses the stackgap for resource limits.  It
  also no longer uses the stackgap for accessing sysctl's for the
  ibcs2_sysconf() syscall but uses kernel_sysctl() instead.  As a result,
  ibcs2_sysconf() no longer needs Giant.
- The p_rlimit macro no longer exists.

Submitted by:	mtm (mostly, I only did a few cleanups and catchups)
Tested on:	i386
Compiled on:	alpha, amd64
2004-02-04 21:52:57 +00:00
David Xu
9b778a1611 Make sigaltstack as per-threaded, because per-process sigaltstack state
is useless for threaded programs, multiple threads can not share same
stack.
The alternative signal stack is private for thread, no lock is needed,
the orignal P_ALTSTACK is now moved into td_pflags and renamed to
TDP_ALTSTACK.
For single thread or Linux clone() based threaded program, there is no
semantic changed, because those programs only have one kernel thread
in every process.
2004-01-03 23:31:29 +00:00
David Xu
a30ec4b99c Make sigaltstack as per-threaded, because per-process sigaltstack state
is useless for threaded programs, multiple threads can not share same
stack.
The alternative signal stack is private for thread, no lock is needed,
the orignal P_ALTSTACK is now moved into td_pflags and renamed to
TDP_ALTSTACK.
For single thread or Linux clone() based threaded program, there is no
semantic changed, because those programs only have one kernel thread
in every process.

Reviewed by: deischen, dfr
2004-01-03 02:02:26 +00:00
Bruce Evans
ff22c670d9 Sorted includes. Removed duplicates exposed by this. 2003-12-29 06:51:10 +00:00
Peter Wemm
bdbbbb1bb9 GC unused 'syshide' override to /dev/null. This was here to disable
the output of the namespc column.  Its functionality was removed some time
ago, but the overrides and the namespc column remained.
2003-12-24 00:32:07 +00:00
Peter Wemm
ff7a52b4b5 Regen (should be a NOP except for rcsid changes) 2003-12-23 03:55:06 +00:00
Peter Wemm
eca6e6472d GC unused third namespace column. 2003-12-23 03:54:40 +00:00
Peter Wemm
9b68618df0 Add an additional field to the elf brandinfo structure to support
quicker exec-time replacement of the elf interpreter on an emulation
environment where an entire /compat/* tree isn't really warranted.
2003-12-23 02:42:39 +00:00
Maxim Sobolev
d09c47acd9 Pull latest changes from OpenBSD:
- improve sysinfo(2) syscall;
- add dummy fadvise64(2) syscall;
- add dummy *xattr(2) family of syscalls;
- add protos for the syscalls 222-225, 238-249 and 253-267;
- add exit_group(2) syscall, which is currently just wired to exit(2).

Obtained from:  OpenBSD
MFC after:      2 weeks
2003-11-16 15:07:10 +00:00
John Baldwin
fab73bc221 Regen. 2003-11-07 21:36:35 +00:00
John Baldwin
572e11ac18 Sync up MP safe flags with global syscalls.master for the first time. This
includes read(), write(), close(), linux_setuid16(), linux_getuid16(),
linux_pause(), linux_nice(), linux_kill(), dup(), linux_pipe(),
linux_setgid16(), linux_getgid16(), linux_signal(), linux_geteuid16(),
linux_getegid16(), acct(), setpgid(), umask(), dup2(), getppid(),
getpgrp(), setsid(), linux_sigaction(), linux_sgetmask(), linux_ssetmask(),
linux_setreuid16(), linux_setregid16(), linux_sigsuspend(), getrusage(),
gettimeofday(), linux_getgroups16(), linux_setgroups16(), getpriority(),
setpriority(), linux_sigreturn(), linux_clone(), linux_sigprocmask(),
linux_getsid(), mlock(), munlock(), mlockall(), munlockall(),
sched_setparam(), sched_getparam(), linux_sched_setscheduler(),
linux_sched_getscheduler(), linux_sched_get_priority_max(),
linux_sched_get_priority_min(), sched_rr_get_interval(),
linux_setresuid16(), linux_getresuid16(), linux_setresgid16(),
linux_getresgid16(), linux_rt_sigaction(), linux_rt_sigprocmask(),
linux_rt_sigsuspend(), geteuid(), getegid(), setreuid(), setregid(),
linux_getgroups(), linux_setgroups(), setresuid(), getresuid(),
setresgid(), getresgid(), setuid(), and setgid().
2003-11-07 21:36:14 +00:00
Peter Wemm
c460ac3a00 Add sysentvec->sv_fixlimits() hook so that we can catch cases on 64 bit
systems where the data/stack/etc limits are too big for a 32 bit process.

Move the 5 or so identical instances of ELF_RTLD_ADDR() into imgact_elf.c.

Supply an ia32_fixlimits function.  Export the clip/default values to
sysctl under the compat.ia32 heirarchy.

Have mmap(0, ...) respect the current p->p_limits[RLIMIT_DATA].rlim_max
value rather than the sysctl tweakable variable.  This allows mmap to
place mappings at sensible locations when limits have been reduced.

Have the imgact_elf.c ld-elf.so.1 placement algorithm use the same
method as mmap(0, ...) now does.

Note that we cannot remove all references to the sysctl tweakable
maxdsiz etc variables because /etc/login.conf specifies a datasize
of 'unlimited'.  And that causes exec etc to fail since it can no
longer find space to mmap things.
2003-09-25 01:10:26 +00:00
Bruce Evans
2cf50c62a6 Restored non-egregious casts so that this file compiles on i386's with
64-bit longs again.
2003-09-07 13:23:45 +00:00
David Xu
0e2a4d3aeb Rename P_THREADED to P_SA. P_SA means a process is using scheduler
activations.
2003-06-15 00:31:24 +00:00
David E. O'Brien
27e0099c4a Use __FBSDID(). 2003-06-02 16:56:40 +00:00
John Baldwin
90af4afacb - Merge struct procsig with struct sigacts.
- Move struct sigacts out of the u-area and malloc() it using the
  M_SUBPROC malloc bucket.
- Add a small sigacts_*() API for managing sigacts structures: sigacts_alloc(),
  sigacts_free(), sigacts_copy(), sigacts_share(), and sigacts_shared().
- Remove the p_sigignore, p_sigacts, and p_sigcatch macros.
- Add a mutex to struct sigacts that protects all the members of the struct.
- Add sigacts locking.
- Remove Giant from nosys(), kill(), killpg(), and kern_sigaction() now
  that sigacts is locked.
- Several in-kernel functions such as psignal(), tdsignal(), trapsignal(),
  and thread_stopped() are now MP safe.

Reviewed by:	arch@
Approved by:	re (rwatson)
2003-05-13 20:36:02 +00:00
Matthew N. Dodd
598d45be84 Provide exec_linux_setregs() to override exec_setregs().
Linux initializes %gs to 0.  Mimic this behavior.

Submitted by:	 Christian Zander <zander@minion.de>
Reviewed by:	 jake
Approved by:	 re
2003-05-11 21:51:11 +00:00
John Baldwin
eeec6bab2e Prefer the proc lock to sched_lock when testing PS_INMEM now that it is
safe to do so.
2003-04-22 20:01:56 +00:00
John Baldwin
9eb78fcfd9 Synchronize the two linux_clone() implementations which includes a few
minor cleanups in both.
2003-04-18 20:54:41 +00:00
John Baldwin
e5567180fb Don't drop the proc lock just to reacquire it after a few simple assignment
statements.  Just hold the lock the entire time.
2003-04-17 22:18:07 +00:00