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freebsd-skq/sys/kern
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cracauer 53573bf465 Implement SA_SIGINFO for i386. Thanks to Bruce Evans for much more 
than a review, this was a nice puzzle.

This is supposed to be binary and source compatible with older
applications that access the old FreeBSD-style three arguments to a
signal handler.

Except those applications that access hidden signal handler arguments
bejond the documented third one. If you have applications that do,
please let me know so that we take the opportunity to provide the
functionality they need in a documented manner.

Also except application that use 'struct sigframe' directly. You need
to recompile gdb and doscmd. `make world` is recommended.

Example program that demonstrates how SA_SIGINFO and old-style FreeBSD
handlers (with their three args) may be used in the same process is at
http://www3.cons.org/tmp/fbsd-siginfo.c

Programs that use the old FreeBSD-style three arguments are easy to
change to SA_SIGINFO (although they don't need to, since the old style
will still work):

  Old args to signal handler:
    void handler_sn(int sig, int code, struct sigcontext *scp)

  New args:
    void handler_si(int sig, siginfo_t *si, void *third)
  where:
    old:code == new:second->si_code
    old:scp == &(new:si->si_scp)     /* Passed by value! */

The latter is also pointed to by new:third, but accessing via
si->si_scp is preferred because it is type-save.

FreeBSD implementation notes:
- This is just the framework to make the interface POSIX compatible.
  For now, no additional functionality is provided. This is supposed
  to happen now, starting with floating point values.
- We don't use 'sigcontext_t.si_value' for now (POSIX meant it for
  realtime-related values).
- Documentation will be updated when new functionality is added and
  the exact arguments passed are determined. The comments in
  sys/signal.h are meant to be useful.

Reviewed by:	BDE
1999-07-06 07:13:48 +00:00
..
bus_if.m * Change device_add_child_after() to device_add_child_ordered() which is 1999-05-28 09:25:16 +00:00
device_if.m Update the comments on values than can be returned by DEVICE_PROBE. 1999-06-17 19:22:12 +00:00
imgact_aout.c Add the options MAP_PREFAULT and MAP_PREFAULT_PARTIAL to vm_map_find/insert, 1999-05-17 00:53:56 +00:00
imgact_elf.c Also try to load the interpreter without prepending "emul_path". This allows 1999-07-05 18:38:29 +00:00
imgact_gzip.c Correctly return ENOEXEC for really short zipped files. The way this is 1999-06-21 16:23:13 +00:00
imgact_shell.c Fix a couple of warnings and some bitrot in comments. 1999-05-09 16:04:14 +00:00
inflate.c kzipboot uses kern/inflate.c outside the kernel by providing its own 1998-11-10 09:08:49 +00:00
init_main.c Slight reorganization of kernel thread/process creation. Instead of using 1999-07-01 13:21:46 +00:00
init_sysent.c Regenerated. 1999-05-13 09:12:57 +00:00
kern_acct.c Suser() simplification: 1999-04-27 11:18:52 +00:00
kern_clock.c Make the machdep.i8254_freq and machdep.tsc_freq sysctls modify the 1999-04-25 09:00:00 +00:00
kern_conf.c Remove cmaj and bmaj args from DEV_DRIVER_MODULE. 1999-07-04 14:58:56 +00:00
kern_descrip.c From the submitter: 1999-06-07 20:37:29 +00:00
kern_environment.c Fix warnings related to -Wall -Wcast-qual 1999-01-28 17:32:05 +00:00
kern_exec.c Suser() simplification: 1999-04-27 11:18:52 +00:00
kern_exit.c From the submitter: 1999-06-07 20:37:29 +00:00
kern_fork.c Stop rfork(0) from panicing. (oops!!) 1999-07-03 20:58:44 +00:00
kern_intr.c Stage 1 of a cleanup of the i386 interrupt registration mechanism. 1999-04-21 07:26:30 +00:00
kern_jail.c Add beer-ware license and $Id$ 1999-04-30 06:51:51 +00:00
kern_kthread.c Slight reorganization of kernel thread/process creation. Instead of using 1999-07-01 13:21:46 +00:00
kern_ktrace.c Make sure syscall arguments properly aligned in ktrace records. 1999-06-16 18:37:01 +00:00
kern_linker.c Slight reorganization of kernel thread/process creation. Instead of using 1999-07-01 13:21:46 +00:00
kern_lock.c When requesting an exclusive lock with LK_NOWAIT, do not panic 1999-06-28 07:54:58 +00:00
kern_lockf.c Fixed corruption of the "blocked" list in lf_setlock() when tsleep() 1999-07-04 14:43:01 +00:00
kern_malloc.c Move the initialisation/tuning of nmbclusters from param.c/machdep.c 1999-07-05 08:52:54 +00:00
kern_mib.c Add sysctl descriptions to many SYSCTL_XXXs 1999-05-03 23:57:32 +00:00
kern_module.c Oops, set module->file.. 1999-05-20 00:00:58 +00:00
kern_ntptime.c Suser() simplification: 1999-04-27 11:18:52 +00:00
kern_physio.c Convert buffer locking from using the B_BUSY and B_WANTED flags to using 1999-06-26 02:47:16 +00:00
kern_proc.c Use NOUDEV for udev_t's 1999-05-17 13:50:24 +00:00
kern_prot.c This Implements the mumbled about "Jail" feature. 1999-04-28 11:38:52 +00:00
kern_random.c Add sufficient braces to keep egcs happy about potentially ambiguous 1999-05-06 18:13:11 +00:00
kern_resource.c This Implements the mumbled about "Jail" feature. 1999-04-28 11:38:52 +00:00
kern_shutdown.c Fix a warning - the code is correct but gcc can't tell. 1999-07-01 22:54:55 +00:00
kern_sig.c Implement SA_SIGINFO for i386. Thanks to Bruce Evans for much more 1999-07-06 07:13:48 +00:00
kern_subr.c This solves a deadlock that can occur when read()ing into a file-mmap() 1999-03-12 03:09:29 +00:00
kern_synch.c The magic "no-cpu" cpu number is 0xff. Don't misrepresent cpu 1999-03-05 16:38:13 +00:00
kern_syscalls.c Call the chained module handler before unregistering the syscall so that 1999-06-27 09:38:44 +00:00
kern_sysctl.c Minor tweaks to make sure (new) prerequisites for <sys/buf.h> (mostly 1999-06-27 11:44:22 +00:00
kern_tc.c Make the machdep.i8254_freq and machdep.tsc_freq sysctls modify the 1999-04-25 09:00:00 +00:00
kern_threads.c Removed bogus casts to c_caddr_t. This is part of terminating 1999-01-29 08:29:05 +00:00
kern_time.c Minor tweaks to make sure (new) prerequisites for <sys/buf.h> (mostly 1999-06-27 11:44:22 +00:00
kern_timeout.c Fix callout_init(). This didn't have any practical effect since it 1999-03-06 22:27:02 +00:00
kern_xxx.c This Implements the mumbled about "Jail" feature. 1999-04-28 11:38:52 +00:00
ksched.c 1. Add new defs for mins and maxs for the POSIX flavor priorities. They 1998-05-19 21:11:53 +00:00
link_aout.c Add enough include files to make this actually compile on an a.out system. 1999-05-15 23:18:32 +00:00
link_elf_obj.c Use KERNBASE for the load address of the kernel rather than magic constants 1999-05-08 13:03:49 +00:00
link_elf.c Use KERNBASE for the load address of the kernel rather than magic constants 1999-05-08 13:03:49 +00:00
Make.tags.inc Update to know about current kernel directory layout. 1999-02-28 22:14:16 +00:00
makedevops.pl Remove hack to accept French spelling of METHOD (METHODE) 1999-05-10 17:45:49 +00:00
Makefile Added ../sys/syscall.mk to targets. Back it up like all the other 1999-05-13 09:19:14 +00:00
makesyscalls.sh Add trailing newline to sys/syscall.mk so that diff doesn't choke on it. 1998-06-28 10:01:52 +00:00
md5c.c This commit fixes various 64bit portability problems required for 1998-06-07 17:13:14 +00:00
p1003_1b.c Well folks, this is it - The second stage of the removal for build support 1999-04-17 08:36:07 +00:00
posix4_mib.c * Change sysctl from using linker_set to construct its tree using SLISTs. 1999-02-16 10:49:55 +00:00
subr_autoconf.c Fix a very long standing bug in run_interrupt_driven_config_hooks(). It 1999-04-25 22:13:34 +00:00
subr_blist.c Add Id strings 1999-06-17 23:42:45 +00:00
subr_bus.c * Add a function devclass_create() which looks up the named devclass and 1999-05-30 10:27:11 +00:00
subr_clist.c Quiet warnings on an Alpha. CBSIZE has long type and causes the other 1999-07-01 19:46:36 +00:00
subr_devstat.c Add sysctl descriptions to many SYSCTL_XXXs 1999-05-03 23:57:32 +00:00
subr_disklabel.c Convert buffer locking from using the B_BUSY and B_WANTED flags to using 1999-06-26 02:47:16 +00:00
subr_diskmbr.c Convert buffer locking from using the B_BUSY and B_WANTED flags to using 1999-06-26 02:47:16 +00:00
subr_diskslice.c dsopen: Print a message if the unit has an invalid sector size. 1999-06-21 03:48:16 +00:00
subr_dkbad.c Convert buffer locking from using the B_BUSY and B_WANTED flags to using 1999-06-26 02:47:16 +00:00
subr_log.c Simplify cdevsw registration. 1999-05-31 11:29:30 +00:00
subr_module.c Align to sizeof(long) rather than sizeof(int32_t). It needs to be 1998-10-14 05:07:23 +00:00
subr_param.c Move the initialisation/tuning of nmbclusters from param.c/machdep.c 1999-07-05 08:52:54 +00:00
subr_prf.c ksprintn() may be called with base=2, so redefine MAXNBUF accordingly. 1999-06-07 18:26:26 +00:00
subr_prof.c Fixed profiling of elf kernels. Made high resolution profiling compile 1999-05-06 09:44:57 +00:00
subr_rman.c Make sure that we record the flags in all cases. 1999-06-26 10:27:30 +00:00
subr_scanf.c Only needed to cast array index from char to unsigned char, did not 1999-02-14 20:58:21 +00:00
subr_smp.c Changes in the way that the APs are started appears to have removed the 1999-06-23 23:02:38 +00:00
subr_trap.c Changed the global `idt' from an array to a pointer so that npx.c 1999-06-18 14:32:21 +00:00
subr_xxx.c Try an fix a couple of dev_t/major/minor etc nits. 1999-05-12 22:30:50 +00:00
sys_generic.c Add standard padding argument to pread and pwrite syscall. That should make them 1999-04-04 21:41:28 +00:00
sys_pipe.c Restructure pipe_read in order to eliminate several race conditions. 1999-06-05 03:53:57 +00:00
sys_process.c Moving the initialization for write sooner quiets a warning. 1999-07-01 22:52:40 +00:00
sys_socket.c Add standard padding argument to pread and pwrite syscall. That should make them 1999-04-04 21:41:28 +00:00
syscalls.c Regenerated. 1999-05-13 09:12:57 +00:00
syscalls.master Fixed nonsense arg type `const caddr_t' in the prototype() for utrace(). 1999-05-13 09:09:37 +00:00
sysv_ipc.c Change suser_xxx() to suser() where it applies. 1999-04-27 12:21:16 +00:00
sysv_msg.c Change suser_xxx() to suser() where it applies. 1999-04-27 12:21:16 +00:00
sysv_sem.c Change suser_xxx() to suser() where it applies. 1999-04-27 12:21:16 +00:00
sysv_shm.c For consistency with other implementations, check for the existence 1999-06-19 23:53:13 +00:00
tty_compat.c This commit fixes various 64bit portability problems required for 1998-06-07 17:13:14 +00:00
tty_conf.c This commit fixes various 64bit portability problems required for 1998-06-07 17:13:14 +00:00
tty_cons.c Quieten some warnings as a result of changes in ls_items[] constness over 1999-06-26 12:19:03 +00:00
tty_pty.c Simplify cdevsw registration. 1999-05-31 11:29:30 +00:00
tty_snoop.c Add Id strings 1999-06-17 23:42:45 +00:00
tty_subr.c Quiet warnings on an Alpha. CBSIZE has long type and causes the other 1999-07-01 19:46:36 +00:00
tty_tb.c Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not 1997-02-22 09:48:43 +00:00
tty_tty.c Simplify cdevsw registration. 1999-05-31 11:29:30 +00:00
tty.c Don't call calcru() on a swapped-out process. calcru() access p_stats, which 1999-05-22 20:10:31 +00:00
uipc_domain.c Redo domain registration to use SYSINITS rather than linker sets. 1999-04-26 08:56:09 +00:00
uipc_mbuf.c Move the initialisation/tuning of nmbclusters from param.c/machdep.c 1999-07-05 08:52:54 +00:00
uipc_proto.c Register the local (unix domain) sockets ourselves. 1999-04-26 08:56:53 +00:00
uipc_sockbuf.c Move the initialisation/tuning of nmbclusters from param.c/machdep.c 1999-07-05 08:52:54 +00:00
uipc_socket2.c Move the initialisation/tuning of nmbclusters from param.c/machdep.c 1999-07-05 08:52:54 +00:00
uipc_socket.c Reviewed by: the cast of thousands 1999-06-17 23:54:50 +00:00
uipc_syscalls.c Fix warnings in preparation for adding -Wall -Wcast-qual to the 1999-01-27 21:50:00 +00:00
uipc_usrreq.c Divorce "dev_t" from the "major|minor" bitmap, which is now called 1999-05-11 19:55:07 +00:00
vfs_aio.c Slight reorganization of kernel thread/process creation. Instead of using 1999-07-01 13:21:46 +00:00
vfs_bio.c The buffer queue mechanism has been reformulated. Instead of having 1999-07-04 00:25:38 +00:00
vfs_cache.c Fix a braino in the v_id wraparound code. Give more (current) details 1999-04-24 17:58:14 +00:00
vfs_cluster.c The vfs.write_behind sysctl and related code support has been added to 1999-07-04 00:31:17 +00:00
vfs_conf.c Fix warnings in last commit (dev_t is not an int, and not even int 1999-07-03 17:40:31 +00:00
vfs_default.c Add Id strings 1999-06-17 23:42:45 +00:00
vfs_export.c The buffer queue mechanism has been reformulated. Instead of having 1999-07-04 00:25:38 +00:00
vfs_extattr.c This Implements the mumbled about "Jail" feature. 1999-04-28 11:38:52 +00:00
vfs_init.c * Register sysctl nodes before running sysinits when loading files and 1999-03-07 16:06:41 +00:00
vfs_lookup.c Fix warnings in preparation for adding -Wall -Wcast-qual to the 1999-01-28 00:57:57 +00:00
vfs_mount.c Fix warnings in last commit (dev_t is not an int, and not even int 1999-07-03 17:40:31 +00:00
vfs_subr.c The buffer queue mechanism has been reformulated. Instead of having 1999-07-04 00:25:38 +00:00
vfs_syscalls.c This Implements the mumbled about "Jail" feature. 1999-04-28 11:38:52 +00:00
vfs_vnops.c Make sure that stat(2) and friends always return a valid st_dev field. 1999-07-02 16:29:47 +00:00
vnode_if.pl Add a vnode argument to VOP_BWRITE to get rid of the last vnode 1999-06-16 23:27:55 +00:00
vnode_if.sh Add a vnode argument to VOP_BWRITE to get rid of the last vnode 1999-06-16 23:27:55 +00:00
vnode_if.src Add a vnode argument to VOP_BWRITE to get rid of the last vnode 1999-06-16 23:27:55 +00:00