freebsd-skq

History

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
..
exec_ecoff.h	Begin all license/copyright comments with /*- or #-	2005-01-05 20:05:52 +00:00
imgact_osf1.c	- Change the vm_mmap() function to accept an objtype_t parameter specifying	2005-04-01 20:00:11 +00:00
Makefile	Add a 'sysent' target that depends on the various files built from	2005-07-13 20:50:17 +00:00
osf1_ioctl.c	Back out alpha/alpha/trap.c:1.124, osf1_ioctl.c:1.14, osf1_misc.c:1.57,	2005-09-28 07:03:03 +00:00
osf1_misc.c	Back out alpha/alpha/trap.c:1.124, osf1_ioctl.c:1.14, osf1_misc.c:1.57,	2005-09-28 07:03:03 +00:00
osf1_mount.c	Do not allocate memory based on not-checked argument from userland.	2005-06-11 14:58:20 +00:00
osf1_proto.h	Regen.	2005-07-13 20:35:09 +00:00
osf1_signal.c	1. Change prototype of trapsignal and sendsig to use ksiginfo_t *, most	2005-10-14 12:43:47 +00:00
osf1_signal.h	1. Change prototype of trapsignal and sendsig to use ksiginfo_t *, most	2005-10-14 12:43:47 +00:00
osf1_syscall.h	Regen.	2005-07-13 20:35:09 +00:00
osf1_sysent.c	Regen.	2005-07-13 20:35:09 +00:00
osf1_sysvec.c	o Split out kernel part of execve(2) syscall into two parts: one that	2005-01-29 23:12:00 +00:00
osf1_util.h	- Implement osf1_emul_find() using kern_alternate_path(). This changes	2005-02-18 18:37:26 +00:00
osf1.h	Begin all license/copyright comments with /*- or #-	2005-01-05 20:05:52 +00:00
README.mach-traps
syscalls.conf	GC unused 'syshide' override to /dev/null. This was here to disable	2003-12-24 00:32:07 +00:00
syscalls.master	Make a pass through all the compat ABIs sychronizing the MP safe flags	2005-07-13 20:32:42 +00:00

README.mach-traps

$NetBSD: README.mach-traps,v 1.2 1999/03/23 09:19:25 itohy Exp $
$FreeBSD$

Some Alpha AXP OSF/1 binaries directly use the facilities provided by
the Mach kernel that is the basis for OSF/1.  These include (but are
surely not limited to) 'dd', 'ps', and 'w'.

Invariably, the symptom that these binaries display is that they crash
with an "unimplemented system call" trap (SIGSYS signal) for a syscall
that has a negative number.  In general, binaries that use the Mach
syscalls appear to invoke task_self() as their first syscall.

The name, number, and number of arguments for each Mach syscall is
given below; this information was gleaned by looking through the OSF/1
libmach.a's object files with dbx, then double-checked against the
contents of OSF/1's <mach/syscall_sw.h>.

These calls would be very difficult to implement properly in the
OSF/1 emulation code; by its very nature, NetBSD is not Mach, and we
don't and can't provide the underlying facilities that it does.

-- cgd

trap name			number	nargs	notes
---- ----			------	-----	-----
task_self			-10	0
thread_reply			-11	0
task_notify			-12	0
thread_self			-13	0
msg_send_old			-14	3
msg_receive_old			-15	3
msg_rpc_old			-16	5
msg_send_trap			-20	4
msg_receive_trap		-21	5
msg_rpc_trap			-22	6
lw_wire				-30	3
lw_unwire			-31	1
nxm_task_init			-33	2
nxm_sched_thread		-34	1
nxm_idle			-35	1
nxm_wakeup_idle			-36	1
nxm_set_pthid			-37	2
nxm_thread_kill			-38	2
nxm_thread_block		-39	1
nxm_thread_wakeup		-40	1
inode_swap_preference		-40	3	old call?
init_process			-41	0
map_fd				-43	5
nxm_resched			-44	2
htg_unix_syscall		-52	3
host_self			-55	1
host_priv_self			-56	1
swtch_pri			-59	1
swtch				-60	0
thread_switch			-61	3
semop_fast			-62	4
mach_sctimes_0			-70	0	only if MACH_SCTIMES defined
mach_sctimes_1			-71	1	only if MACH_SCTIMES defined
mach_sctimes_2			-72	2	only if MACH_SCTIMES defined
mach_sctimes_3			-73	3	only if MACH_SCTIMES defined
mach_sctimes_4			-74	4	only if MACH_SCTIMES defined
mach_sctimes_5			-75	5	only if MACH_SCTIMES defined
mach_sctimes_6			-76	6	only if MACH_SCTIMES defined
mach_sctimes_7			-77	0	only if MACH_SCTIMES defined
mach_sctimes_8			-78	6	only if MACH_SCTIMES defined
mach_sctimes_9			-79	1	only if MACH_SCTIMES defined
mach_sctimes_10			-80	2	only if MACH_SCTIMES defined
mach_sctimes_11			-81	2	only if MACH_SCTIMES defined
mach_sctimes_port_alloc_dealloc	-82	1	only if MACH_SCTIMES defined