Commit Graph

57 Commits

Author SHA1 Message Date
David Xu
9104847f21 1. Change prototype of trapsignal and sendsig to use ksiginfo_t *, most
changes in MD code are trivial, before this change, trapsignal and
   sendsig use discrete parameters, now they uses member fields of
   ksiginfo_t structure. For sendsig, this change allows us to pass
   POSIX realtime signal value to user code.

2. Remove cpu_thread_siginfo, it is no longer needed because we now always
   generate ksiginfo_t data and feed it to libpthread.

3. Add p_sigqueue to proc structure to hold shared signals which were
   blocked by all threads in the proc.

4. Add td_sigqueue to thread structure to hold all signals delivered to
   thread.

5. i386 and amd64 now return POSIX standard si_code, other arches will
   be fixed.

6. In this sigqueue implementation, pending signal set is kept as before,
   an extra siginfo list holds additional siginfo_t data for signals.
   kernel code uses psignal() still behavior as before, it won't be failed
   even under memory pressure, only exception is when deleting a signal,
   we should call sigqueue_delete to remove signal from sigqueue but
   not SIGDELSET. Current there is no kernel code will deliver a signal
   with additional data, so kernel should be as stable as before,
   a ksiginfo can carry more information, for example, allow signal to
   be delivered but throw away siginfo data if memory is not enough.
   SIGKILL and SIGSTOP have fast path in sigqueue_add, because they can
   not be caught or masked.
   The sigqueue() syscall allows user code to queue a signal to target
   process, if resource is unavailable, EAGAIN will be returned as
   specification said.
   Just before thread exits, signal queue memory will be freed by
   sigqueue_flush.
   Current, all signals are allowed to be queued, not only realtime signals.

Earlier patch reviewed by: jhb, deischen
Tested on: i386, amd64
2005-10-14 12:43:47 +00:00
Peter Wemm
add121a476 Implement 32 bit getcontext/setcontext/swapcontext on amd64. I've added
stubs for ia64 to keep it compiling.  These are used by 32 bit apps such
as gdb.
2005-09-27 18:04:20 +00:00
Marcel Moolenaar
464d16ddf0 Move the ia32_sigcode structure from ia32_sigtramp.c to ia32_signal.c.
It's a bit excessive to have it in a file of its own.
2005-09-10 02:12:49 +00:00
Marcel Moolenaar
0522a40412 Remove redundant $FreeBSD$ 2005-09-10 01:13:33 +00:00
Peter Wemm
62919d788b Jumbo-commit to enhance 32 bit application support on 64 bit kernels.
This is good enough to be able to run a RELENG_4 gdb binary against
a RELENG_4 application, along with various other tools (eg: 4.x gcore).
We use this at work.

ia32_reg.[ch]: handle the 32 bit register file format, used by ptrace,
	procfs and core dumps.
procfs_*regs.c: vary the format of proc/XXX/*regs depending on the client
	and target application.
procfs_map.c: Don't print a 64 bit value to 32 bit consumers, or their
	sscanf fails.  They expect an unsigned long.
imgact_elf.c: produce a valid 32 bit coredump for 32 bit apps.
sys_process.c: handle 32 bit consumers debugging 32 bit targets.  Note
	that 64 bit consumers can still debug 32 bit targets.

IA64 has got stubs for ia32_reg.c.

Known limitations: a 5.x/6.x gdb uses get/setcontext(), which isn't
implemented in the 32/64 wrapper yet.  We also make a tiny patch to
gdb pacify it over conflicting formats of ld-elf.so.1.

Approved by:	re
2005-06-30 07:49:22 +00:00
John Baldwin
aa9aa68d2f Use PCPU_LAZY_INC() for cnt.v_{intr,trap,syscalls} rather than atomic
operations in some places and simple non-per CPU math in others.
2005-04-12 23:18:54 +00:00
Warner Losh
86cb007f9f /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
Marcel Moolenaar
287e12f172 ...And fix WITNESS builds: declare syscallnames. 2004-09-26 20:39:56 +00:00
Marcel Moolenaar
feae534e49 Fix INVARIANTS build: Include <machine/cpu.h>. 2004-09-26 00:38:56 +00:00
Marcel Moolenaar
03bfdd1362 Move the IA-32 trap handling from trap() to ia32_trap(). Move the
ia32_syscall() function along with it to ia32_trap.c. When COMPAT_IA32
is not defined, we'll raise SIGEMT instead.
2004-09-25 04:27:44 +00:00
Peter Wemm
59553d37df Add missing #include "opt_compat.h" so that the compatability function
freebsd4_freebsd32_sigreturn() is defined when expected.  This should
unbreak the tinderbox. Sorry.
2003-12-18 06:59:18 +00:00
Peter Wemm
64d85faa1c Assimilate ia64 back into the fold with the common freebsd32/ia32 code.
The split-up code is derived from the ia64 code originally.

Note that I have only compile-tested this, not actually run-tested it.
The ia64 side of the force is missing some significant chunks of signal
delivery code.
2003-12-11 01:05:09 +00:00
John Baldwin
dac33f12cc Regen. 2003-11-07 20:30:30 +00:00
John Baldwin
a060e9b7ef Sync with global syscalls.master. ptrace(), dup(), pipe(), ktrace(),
ia32_sigaltstack(), sysarch(), issetugid(), utrace(), and ia32_sigaction()
are MP safe.
2003-11-07 20:27:16 +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
John Baldwin
e7411b9d71 Regen. 2003-08-21 14:16:41 +00:00
John Baldwin
daf54a1e05 Swap sigaction/sigreturn since they are in the wrong order.
Noticed indirectly by:	peter
2003-08-21 14:16:00 +00:00
Gordon Tetlow
df3d69c217 Fixup the ELF branding information to point to the new home of rtld. 2003-08-17 08:08:38 +00:00
Marcel Moolenaar
f2c49dd248 Revamp of the syscall path, exception and context handling. The
prime objectives are:
o  Implement a syscall path based on the epc inststruction (see
   sys/ia64/ia64/syscall.s).
o  Revisit the places were we need to save and restore registers
   and define those contexts in terms of the register sets (see
   sys/ia64/include/_regset.h).

Secundairy objectives:
o  Remove the requirement to use contigmalloc for kernel stacks.
o  Better handling of the high FP registers for SMP systems.
o  Switch to the new cpu_switch() and cpu_throw() semantics.
o  Add a good unwinder to reconstruct contexts for the rare
   cases we need to (see sys/contrib/ia64/libuwx)

Many files are affected by this change. Functionally it boils
down to:
o  The EPC syscall doesn't preserve registers it does not need
   to preserve and places the arguments differently on the stack.
   This affects libc and truss.
o  The address of the kernel page directory (kptdir) had to
   be unstaticized for use by the nested TLB fault handler.
   The name has been changed to ia64_kptdir to avoid conflicts.
   The renaming affects libkvm.
o  The trapframe only contains the special registers and the
   scratch registers. For syscalls using the EPC syscall path
   no scratch registers are saved. This affects all places where
   the trapframe is accessed. Most notably the unaligned access
   handler, the signal delivery code and the debugger.
o  Context switching only partly saves the special registers
   and the preserved registers. This affects cpu_switch() and
   triggered the move to the new semantics, which additionally
   affects cpu_throw().
o  The high FP registers are either in the PCB or on some
   CPU. context switching for them is done lazily. This affects
   trap().
o  The mcontext has room for all registers, but not all of them
   have to be defined in all cases. This mostly affects signal
   delivery code now. The *context syscalls are as of yet still
   unimplemented.

Many details went into the removal of the requirement to use
contigmalloc for kernel stacks. The details are mostly CPU
specific and limited to exception_save() and exception_restore().
The few places where we create, destroy or switch stacks were
mostly simplified by not having to construct physical addresses
and additionally saving the virtual addresses for later use.

Besides more efficient context saving and restoring, which of
course yields a noticable speedup, this also fixes the dreaded
SMP bootup problem as a side-effect. The details of which are
still not fully understood.

This change includes all the necessary backward compatibility
code to have it handle older userland binaries that use the
break instruction for syscalls. Support for break-based syscalls
has been pessimized in favor of a clean implementation. Due to
the overall better performance of the kernel, this will still
be notived as an improvement if it's noticed at all.

Approved by: re@ (jhb)
2003-05-16 21:26:42 +00:00
John Baldwin
d8ca78d02f Regen. 2003-04-25 15:59:44 +00:00
John Baldwin
9fb3809a3a Oops, the thr_* and jail_attach() syscall entries should be NOPROTO rather
than STD.
2003-04-25 15:59:18 +00:00
John Baldwin
9bc65d35f2 Regen. 2003-04-24 20:50:57 +00:00
John Baldwin
d46b3412dc Fix the thr_create() entry by adding a trailing \. Also, sync up the
MP safe flag for thr_* with the main table.
2003-04-24 20:49:46 +00:00
John Baldwin
fe8cdcae87 - Replace inline implementations of sigprocmask() with calls to
kern_sigprocmask() in the various binary compatibility emulators.
- Replace calls to sigsuspend(), sigaltstack(), sigaction(), and
  sigprocmask() that used the stackgap with calls to the corresponding
  kern_sig*() functions instead without using the stackgap.
2003-04-22 18:23:49 +00:00
Mike Barcroft
fd7a8150fb o In struct prison, add an allprison linked list of prisons (protected
by allprison_mtx), a unique prison/jail identifier field, two path
  fields (pr_path for reporting and pr_root vnode instance) to store
  the chroot() point of each jail.
o Add jail_attach(2) to allow a process to bind to an existing jail.
o Add change_root() to perform the chroot operation on a specified
  vnode.
o Generalize change_dir() to accept a vnode, and move namei() calls
  to callers of change_dir().
o Add a new sysctl (security.jail.list) which is a group of
  struct xprison instances that represent a snapshot of active jails.

Reviewed by:	rwatson, tjr
2003-04-09 02:55:18 +00:00
Jeff Roberson
a0704f9de9 - Add thr and umtx system calls. 2003-04-01 01:15:56 +00:00
Jeff Roberson
a9b34138dc - Add a placeholder for sigwait 2003-03-31 23:36:40 +00:00
Warner Losh
a163d034fa Back out M_* changes, per decision of the TRB.
Approved by: trb
2003-02-19 05:47:46 +00:00
Poul-Henning Kamp
f341ca9891 Remove #include <sys/dkstat.h> 2003-02-16 14:13:23 +00:00
Alfred Perlstein
44956c9863 Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0.
Merge M_NOWAIT/M_DONTWAIT into a single flag M_NOWAIT.
2003-01-21 08:56:16 +00:00
Robert Watson
a95f262c6b Synchronize to kern/syscalls.master:1.139.
Obtained from:	TrustedBSD Project
2002-12-29 20:33:26 +00:00
Marcel Moolenaar
722d8e49a9 Regen: swapoff 2002-12-16 00:49:36 +00:00
Marcel Moolenaar
3f60ecab4e Change swapoff from MNOPROTO to UNIMPL. The former doesn't work. 2002-12-16 00:48:52 +00:00
Matthew Dillon
92da00bb24 This is David Schultz's swapoff code which I am finally able to commit.
This should be considered highly experimental for the moment.

Submitted by:	David Schultz <dschultz@uclink.Berkeley.EDU>
MFC after:	3 weeks
2002-12-15 19:17:57 +00:00
Alfred Perlstein
d1e405c5ce SCARGS removal take II. 2002-12-14 01:56:26 +00:00
Alfred Perlstein
bc9e75d7ca Backout removal SCARGS, the code freeze is only "selectively" over. 2002-12-13 22:41:47 +00:00
Alfred Perlstein
0bbe7292e1 Remove SCARGS.
Reviewed by: md5
2002-12-13 22:27:25 +00:00
Daniel Eischen
84b427ce23 Regenerate after adding syscalls. 2002-11-16 23:48:14 +00:00
Daniel Eischen
a4b04278f0 Add *context() syscalls to ia64 32-bit compatability table as requested
in kern/syscalls.master.
2002-11-16 15:15:17 +00:00
Robert Watson
fabb3caa9e Sync to src/sys/kern/syscalls.master 2002-11-02 23:55:30 +00:00
Peter Wemm
8556393bb2 Stake a claim on 418 (__xstat), 419 (__xfstat), 420 (__xlstat) 2002-10-19 22:25:31 +00:00
Peter Wemm
c8447553b5 Grab 416/417 real estate before I get burned while testing again.
This is for the not-quite-ready signal/fpu abi stuff.  It may not see
the light of day, but I'm certainly not going to be able to validate it
when getting shot in the foot due to syscall number conflicts.
2002-10-19 22:09:23 +00:00
Robert Watson
bc5245d94c Add a placeholder for the execve_mac() system call, similar to SELinux's
execve_secure() system call, which permits a process to pass in a label
for a label change during exec.  This permits SELinux to change the
label for the resulting exec without a race following a manual label
change on the process.  Because this interface uses our general purpose
MAC label abstraction, we call it execve_mac(), and wrap our port of
SELinux's execve_secure() around it with appropriate sid mappings.

Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, Network Associates Laboratories
2002-10-19 21:06:57 +00:00
Peter Wemm
d6b8445ebd re-regen. Sigh. 2002-10-09 22:40:41 +00:00
Peter Wemm
d4f4eb09d9 Sigh. Fix fat-fingering of diff. I knew this was going to happen. 2002-10-09 22:40:02 +00:00
Peter Wemm
9105d26b73 regenerate. sendfile stuff and other recently picked up stubs. 2002-10-09 22:28:48 +00:00
Peter Wemm
459e3a7a37 Try and deal with the #ifdef COMPAT_FREEBSD4 sendfile stuff. This would
have been a lot easier if do_sendfile() was usable externally.
2002-10-09 22:27:24 +00:00
Peter Wemm
4f4c431d9b Try and patch up some tab-to-space spammage. 2002-10-09 22:14:35 +00:00
Peter Wemm
8e223883f0 Add placeholder stubs for nsendfile, mac_syscall, ksem_close, ksem_post,
ksem_wait, ksem_trywait, ksem_init, ksem_open, ksem_unlink, ksem_getvalue,
ksem_destroy, __mac_get_pid, __mac_get_link, __mac_set_link,
extattr_set_link, extattr_get_link, extattr_delete_link.
2002-10-09 22:10:23 +00:00
Archie Cobbs
36a8dac10d Let kse_wakeup() take a KSE mailbox pointer argument.
Reviewed by:	julian
2002-10-02 16:48:16 +00:00