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4cf7545589
freebsd-skq/sys/kern
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Robert Watson 4cf7545589 Attempt to make break-to-debugger and alternative break-to-debugger more 
accessible:

(1) Always compile in support for breaking into the debugger if options
    KDB is present in the kernel.

(2) Disable both by default, but allow them to be enabled via tunables
    and sysctls debug.kdb.break_to_debugger and
    debug.kdb.alt_break_to_debugger.

(3) options BREAK_TO_DEBUGGER and options ALT_BREAK_TO_DEBUGGER continue
    to behave as before -- only now instead of compiling in
    break-to-debugger support, they change the default values of the
    above sysctls to enable those features by default.  Current kernel
    configurations should, therefore, continue to behave as expected.

(4) Migrate alternative break-to-debugger state machine logic out of
    individual device drivers into centralised KDB code.  This has a
    number of upsides, but also one downside: it's now tricky to release
    sio spin locks when entering the debugger, so we don't.  However,
    similar logic does not exist in other device drivers, including uart.

(5) dcons requires some special handling; unlike other console types, it
    allows overriding KDB's own debugger selection, so we need a new
    interface to KDB to allow that to work.

GENERIC kernels in -CURRENT will now support break-to-debugger as long as
appropriate boot/run-time options are set, which should improve the
debuggability of BETA kernels significantly.

MFC after:	3 weeks
Reviewed by:	kib, nwhitehorn
Approved by:	re (bz)
2011-08-26 21:46:36 +00:00
..
bus_if.m Add a new bus method, BUS_ADJUST_RESOURCE() that is intended to be a 2011-04-29 21:36:45 +00:00
capabilities.conf Add experimental support for process descriptors 2011-08-18 22:51:30 +00:00
clock_if.m
cpufreq_if.m
device_if.m Update comments for DEVICE_PROBE() to reflect that BUS_PROBE_DEFAULT is 2011-05-24 13:22:40 +00:00
genassym.sh
imgact_aout.c Do not trash the argv[0] pointer for an a.out process on amd64. 2011-06-16 22:00:59 +00:00
imgact_elf32.c
imgact_elf64.c
imgact_elf.c All the racct_*() calls need to happen with the proc locked. Fixing this 2011-07-06 20:06:44 +00:00
imgact_gzip.c Add accounting for most of the memory-related resources. 2011-04-05 20:23:59 +00:00
imgact_shell.c The execution of the shebang script requires putting interpreter path, 2011-03-06 22:59:30 +00:00
inflate.c
init_main.c Add experimental support for process descriptors 2011-08-18 22:51:30 +00:00
init_sysent.c Auto-generated system call code based on r224987. 2011-08-18 23:08:52 +00:00
kern_acct.c Use ISO C99 integer types in sys/kern where possible. 2010-06-21 09:55:56 +00:00
kern_alq.c
kern_clock.c - Remove the eintrcnt/eintrnames usage and introduce the concept of 2011-07-18 15:19:40 +00:00
kern_clocksource.c Set negative quality to TSC timecounter when C3 state is enabled for Intel 2011-06-22 16:40:45 +00:00
kern_condvar.c
kern_conf.c Fix the devmtx lock leak from make_dev(9) when the old device cloning 2011-07-30 14:12:37 +00:00
kern_cons.c Add descriptions to a handful of sysctl nodes. 2010-08-09 14:48:31 +00:00
kern_context.c Clear the padding when returning context to the usermode, for 2011-02-05 15:10:27 +00:00
kern_cpu.c cpufreq: allocate long-lived buffer for handling of sysctl requests 2010-07-23 16:46:42 +00:00
kern_cpuset.c Fix KTR_CPUMASK in order to accept a string representing a cpuset_t. 2011-05-31 20:48:58 +00:00
kern_ctf.c
kern_descrip.c Add experimental support for process descriptors 2011-08-18 22:51:30 +00:00
kern_dtrace.c Add some FEATURE macros for various features (AUDIT/CAM/IPC/KTR/MAC/NFS/NTP/ 2011-02-25 10:11:01 +00:00
kern_environment.c In init_dynamic_kenv(), ignore environment strings exceeding the 2011-05-23 16:40:44 +00:00
kern_et.c sysctl(9) cleanup checkpoint: amd64 GENERIC builds cleanly. 2011-01-12 19:54:19 +00:00
kern_event.c Fix a deficiency in the selinfo interface: 2011-08-25 15:51:54 +00:00
kern_exec.c Second-to-last commit implementing Capsicum capabilities in the FreeBSD 2011-08-11 12:30:23 +00:00
kern_exit.c Add experimental support for process descriptors 2011-08-18 22:51:30 +00:00
kern_fail.c Add an option to have a fail point term only execute when run by a 2011-07-08 20:41:12 +00:00
kern_fork.c Add experimental support for process descriptors 2011-08-18 22:51:30 +00:00
kern_gzio.c
kern_hhook.c Staticize malloc types. 2011-04-13 11:28:46 +00:00
kern_idle.c On multi-core, multi-threaded PPC systems, it is important that the threads 2011-05-31 15:11:43 +00:00
kern_intr.c - Remove the eintrcnt/eintrnames usage and introduce the concept of 2011-07-18 15:19:40 +00:00
kern_jail.c Delay the recursive decrement of pr_uref when jails are made invisible 2011-08-26 16:03:34 +00:00
kern_khelp.c Use the full and proper company name for Swinburne University of Technology 2011-04-12 08:13:18 +00:00
kern_kthread.c Add experimental support for process descriptors 2011-08-18 22:51:30 +00:00
kern_ktr.c Fix KTR_CPUMASK in order to accept a string representing a cpuset_t. 2011-05-31 20:48:58 +00:00
kern_ktrace.c Fix several places to ignore processes that are not yet fully constructed. 2011-04-06 17:47:22 +00:00
kern_linker.c Don't leak kld_sx lock in kldunloadf(). 2011-07-31 13:49:15 +00:00
kern_lock.c Fix the LK_NOSHARE lockmgr flag interaction with LK_UPGRADE and 2011-08-01 19:07:03 +00:00
kern_lockf.c
kern_lockstat.c
kern_loginclass.c Add racct. It's an API to keep per-process, per-jail, per-loginclass 2011-03-29 17:47:25 +00:00
kern_malloc.c Modestly increase the maximum allowed size of the kmem map on i386. 2011-03-23 16:38:29 +00:00
kern_mbuf.c Use ISO C99 integer types in sys/kern where possible. 2010-06-21 09:55:56 +00:00
kern_mib.c Define two new sysctl node flags: CTLFLAG_CAPRD and CTLFLAG_CAPRW, which 2011-07-17 23:05:24 +00:00
kern_module.c Style fix. 2010-11-22 15:28:54 +00:00
kern_mtxpool.c
kern_mutex.c - Remove <machine/mutex.h>. Most of the headers were empty, and the 2010-11-09 20:46:41 +00:00
kern_ntptime.c Add some FEATURE macros for various features (AUDIT/CAM/IPC/KTR/MAC/NFS/NTP/ 2011-02-25 10:11:01 +00:00
kern_osd.c
kern_physio.c Account i/o done on cdevs. 2010-11-25 20:05:11 +00:00
kern_pmc.c Commit the support for removing cpumask_t and replacing it directly with 2011-05-05 14:39:14 +00:00
kern_poll.c
kern_priv.c Add an extra comment to the SDT probes definition. This allows us to get 2010-08-22 11:18:57 +00:00
kern_proc.c One of the general principles of the sysctl(3) API is that a user can 2011-08-18 22:20:45 +00:00
kern_prot.c Notify racct when process credentials change. 2011-03-31 18:12:04 +00:00
kern_racct.c Rename resource names to match these in login.conf. 2011-07-14 19:18:17 +00:00
kern_rctl.c Rename resource names to match these in login.conf. 2011-07-14 19:18:17 +00:00
kern_resource.c - Export each thread's individual resource usage in in struct kinfo_proc's 2011-07-18 17:33:08 +00:00
kern_rmlock.c Remove pc_cpumask and pc_other_cpus usage from MI code. 2011-06-13 13:28:31 +00:00
kern_rwlock.c
kern_sdt.c Use ISO C99 integer types in sys/kern where possible. 2010-06-21 09:55:56 +00:00
kern_sema.c
kern_shutdown.c remove RESTARTABLE_PANICS option 2011-07-25 09:12:48 +00:00
kern_sig.c Add experimental support for process descriptors 2011-08-18 22:51:30 +00:00
kern_switch.c Update several places that iterate over CPUs to use CPU_FOREACH(). 2010-06-11 18:46:34 +00:00
kern_sx.c - Merge changes to the base system to support OFED. These include 2011-03-21 09:40:01 +00:00
kern_synch.c Simplify a stale assertion. We have not called mi_switch() from a nested 2011-05-24 13:17:08 +00:00
kern_syscalls.c Call chainevh callback when we are invoked with neither MOD_LOAD nor 2010-10-21 20:31:50 +00:00
kern_sysctl.c Define two new sysctl node flags: CTLFLAG_CAPRD and CTLFLAG_CAPRW, which 2011-07-17 23:05:24 +00:00
kern_tc.c If TSC stops ticking in C3, disable deep sleep when the user forcefully 2011-07-14 21:00:26 +00:00
kern_thr.c All the racct_*() calls need to happen with the proc locked. Fixing this 2011-07-06 20:06:44 +00:00
kern_thread.c Fix some locking nits with the p_state field of struct proc: 2011-03-24 18:40:11 +00:00
kern_time.c Create a global thread hash table to speed up thread lookup, use 2010-10-09 02:50:23 +00:00
kern_timeout.c callout_cpu_switch() allows preemption when dropping the outcoming 2011-08-21 10:52:50 +00:00
kern_umtx.c Expose the umtx_key structure and API to the rest of the kernel. 2011-02-23 13:19:14 +00:00
kern_uuid.c
kern_xxx.c
ksched.c Use p4prio_to_tsprio to calculate TS priority instead of using 2011-06-07 02:50:14 +00:00
link_elf_obj.c Remove malloc(9) return value checks when M_WAITOK is used. 2011-04-16 16:20:51 +00:00
link_elf.c Even if the loaded module has no symbols, we still need to notify 2011-06-16 17:41:21 +00:00
linker_if.m
Make.tags.inc Update tags build script 2011-07-10 00:53:04 +00:00
Makefile Continue to introduce Capsicum Capability Mode support: 2011-03-01 13:28:27 +00:00
makesyscalls.sh add DTrace systrace support for linux32 and freebsd32 on amd64 syscalls 2011-03-12 08:51:43 +00:00
md4c.c
md5c.c
p1003_1b.c Set various POSIX capability sysctls to the version of the API that is 2010-11-19 17:56:16 +00:00
posix4_mib.c Define two new sysctl node flags: CTLFLAG_CAPRD and CTLFLAG_CAPRW, which 2011-07-17 23:05:24 +00:00
sched_4bsd.c Fix format strings for KTR_STATE in 4BSD ad ULE schedulers. 2011-08-26 18:00:07 +00:00
sched_ule.c Fix format strings for KTR_STATE in 4BSD ad ULE schedulers. 2011-08-26 18:00:07 +00:00
serdev_if.m
stack_protector.c
subr_acl_nfs4.c Make UFS use PSARC/2010/029 NFSv4 ACL semantics by default, bringing 2011-03-22 19:52:29 +00:00
subr_acl_posix1e.c execve(2) has a special check for file permissions: a file must have at 2010-08-30 16:30:18 +00:00
subr_autoconf.c Retire PCONFIG and leave the priority of thread0 alone when waiting for 2011-01-06 22:09:37 +00:00
subr_blist.c
subr_bufring.c
subr_bus.c Add a new bus method, BUS_ADJUST_RESOURCE() that is intended to be a 2011-04-29 21:36:45 +00:00
subr_clock.c Improve style and wording of comments and sysctl descriptions [1]. 2011-01-09 14:34:56 +00:00
subr_devstat.c Instead of using an atomic operation to determine whether the devstat(9) 2011-06-13 22:08:24 +00:00
subr_disk.c Correct bioq_disksort so that bioq_insert_tail() offers barrier semantic. 2010-09-02 19:40:28 +00:00
subr_eventhandler.c
subr_fattime.c Use ISO C99 integer types in sys/kern where possible. 2010-06-21 09:55:56 +00:00
subr_firmware.c
subr_hash.c
subr_hints.c
subr_kdb.c Attempt to make break-to-debugger and alternative break-to-debugger more 2011-08-26 21:46:36 +00:00
subr_kobj.c sysctl(9) cleanup checkpoint: amd64 GENERIC builds cleanly. 2011-01-12 19:54:19 +00:00
subr_lock.c Explicitly wire the user buffer rather than doing it implicitly in 2011-01-27 00:34:12 +00:00
subr_log.c Finish r210923, 210926. Mark some devices as eternal. 2011-01-04 10:59:38 +00:00
subr_mbpool.c
subr_mchain.c Add some FEATURE macros for various features (AUDIT/CAM/IPC/KTR/MAC/NFS/NTP/ 2011-02-25 10:11:01 +00:00
subr_module.c Provide convenience function for obtaining MODINFO_ADDR and MODINFO_SIZE 2011-02-09 19:08:21 +00:00
subr_msgbuf.c Fix a bug introduced in revision 222537. 2011-05-31 22:39:32 +00:00
subr_param.c Modestly increase the maximum allowed size of the kmem map on i386. 2011-03-23 16:38:29 +00:00
subr_pcpu.c Remove pc_name member of struct pcpu. 2011-07-19 14:57:59 +00:00
subr_power.c
subr_prf.c Set pca.p_bufr to NULL when we haven't allocated a buffer. 2011-06-07 05:04:37 +00:00
subr_prof.c Revert r210225 - turns out I was wrong; the "/*-" is not license-only 2010-07-18 20:57:53 +00:00
subr_rman.c Clear the device_t pointer in 'struct resource' when releasing a device 2011-06-06 13:12:56 +00:00
subr_rtc.c Add the half of time-of-day clock resolution when we adjust system time from 2010-08-12 17:17:05 +00:00
subr_sbuf.c r222015 introduced a new assertion that the size of a fixed-length sbuf 2011-08-19 08:29:10 +00:00
subr_scanf.c
subr_sglist.c
subr_sleepqueue.c Explicitly wire the user buffer rather than doing it implicitly in 2011-01-27 00:34:12 +00:00
subr_smp.c smp_rendezvous: master cpu should wait until all slaves are fully done 2011-07-30 20:29:39 +00:00
subr_stack.c Add some FEATURE macros for various features (AUDIT/CAM/IPC/KTR/MAC/NFS/NTP/ 2011-02-25 10:11:01 +00:00
subr_taskqueue.c Implement the delayed task execution extension to the taskqueue 2011-04-26 11:39:56 +00:00
subr_trap.c We may split today's CAPABILITIES into CAPABILITY_MODE (which has 2011-06-29 13:03:05 +00:00
subr_turnstile.c Always assert that the turnstile chain lock is held in turnstile_wait() 2011-02-04 14:16:41 +00:00
subr_uio.c Add a facility to disable processing page faults. When activated, 2011-07-09 15:21:10 +00:00
subr_unit.c Fix typos - remove duplicate "the". 2011-02-21 09:01:34 +00:00
subr_witness.c Fix typos - remove duplicate "the". 2011-02-21 09:01:34 +00:00
sys_capability.c Add the fo_chown and fo_chmod methods to struct fileops and use them 2011-08-16 20:07:47 +00:00
sys_generic.c Fix a deficiency in the selinfo interface: 2011-08-25 15:51:54 +00:00
sys_pipe.c Fix a deficiency in the selinfo interface: 2011-08-25 15:51:54 +00:00
sys_procdesc.c Add experimental support for process descriptors 2011-08-18 22:51:30 +00:00
sys_process.c Add comment from CSRG rev 7.27 (1992/06/23 19:56:55; author: mckusick) 2011-06-17 21:44:13 +00:00
sys_socket.c Add the fo_chown and fo_chmod methods to struct fileops and use them 2011-08-16 20:07:47 +00:00
syscalls.c Auto-generated system call code based on r224987. 2011-08-18 23:08:52 +00:00
syscalls.master Add experimental support for process descriptors 2011-08-18 22:51:30 +00:00
systrace_args.c Auto-generated system call code based on r224987. 2011-08-18 23:08:52 +00:00
sysv_ipc.c
sysv_msg.c All the racct_*() calls need to happen with the proc locked. Fixing this 2011-07-06 20:06:44 +00:00
sysv_sem.c Remove semaphore map entry count "semmap" field and its tuning 2011-07-14 14:18:14 +00:00
sysv_shm.c All the racct_*() calls need to happen with the proc locked. Fixing this 2011-07-06 20:06:44 +00:00
tty_compat.c
tty_info.c
tty_inq.c Fix whitespace inconsistencies in the TTY layer and its drivers owned by me. 2011-06-26 18:26:20 +00:00
tty_outq.c Fix whitespace inconsistencies in the TTY layer and its drivers owned by me. 2011-06-26 18:26:20 +00:00
tty_pts.c Fix a deficiency in the selinfo interface: 2011-08-25 15:51:54 +00:00
tty_tty.c Finish r210923, 210926. Mark some devices as eternal. 2011-01-04 10:59:38 +00:00
tty_ttydisc.c Fix whitespace inconsistencies in the TTY layer and its drivers owned by me. 2011-06-26 18:26:20 +00:00
tty.c Fix a deficiency in the selinfo interface: 2011-08-25 15:51:54 +00:00
uipc_accf.c
uipc_cow.c Add some FEATURE macros for various features (AUDIT/CAM/IPC/KTR/MAC/NFS/NTP/ 2011-02-25 10:11:01 +00:00
uipc_debug.c
uipc_domain.c
uipc_mbuf2.c Use ISO C99 integer types in sys/kern where possible. 2010-06-21 09:55:56 +00:00
uipc_mbuf.c Fix typos - remove duplicate "the". 2011-02-21 09:01:34 +00:00
uipc_mqueue.c Fix a deficiency in the selinfo interface: 2011-08-25 15:51:54 +00:00
uipc_sem.c Fix build breakage. Initialize error variables explicitely for !MAC case. 2011-08-17 12:37:14 +00:00
uipc_shm.c Fix build breakage. Initialize error variables explicitely for !MAC case. 2011-08-17 12:37:14 +00:00
uipc_sockbuf.c Increase the defaults for the maximum socket buffer limit, 2011-08-25 09:20:13 +00:00
uipc_socket.c Fix a deficiency in the selinfo interface: 2011-08-25 15:51:54 +00:00
uipc_syscalls.c Second-to-last commit implementing Capsicum capabilities in the FreeBSD 2011-08-11 12:30:23 +00:00
uipc_usrreq.c Prevent the hiwatermark for the unix domain socket from becoming 2011-08-20 16:12:29 +00:00
vfs_acl.c Second-to-last commit implementing Capsicum capabilities in the FreeBSD 2011-08-11 12:30:23 +00:00
vfs_aio.c Second-to-last commit implementing Capsicum capabilities in the FreeBSD 2011-08-11 12:30:23 +00:00
vfs_bio.c Call pmap_qremove() before freeing or unwiring the pages, otherwise 2011-07-05 18:40:37 +00:00
vfs_cache.c Fix some more style(9) issues. 2010-11-14 16:10:15 +00:00
vfs_cluster.c The hardware has caught up; improvements are now observed even at 128, 2011-03-16 16:22:59 +00:00
vfs_default.c Add a lock flags argument to the VFS_FHTOVP() file system 2011-05-22 01:07:54 +00:00
vfs_export.c
vfs_extattr.c Second-to-last commit implementing Capsicum capabilities in the FreeBSD 2011-08-11 12:30:23 +00:00
vfs_hash.c
vfs_init.c
vfs_lookup.c Allow Capsicum capabilities to delegate constrained 2011-08-13 09:21:16 +00:00
vfs_mount.c Revert r224655 and r224614 because vn_fullpath* does not always work 2011-08-08 14:02:08 +00:00
vfs_mountroot.c Include sys/sbuf.h directly. 2011-07-11 05:17:46 +00:00
vfs_subr.c Fix a deficiency in the selinfo interface: 2011-08-25 15:51:54 +00:00
vfs_syscalls.c Add the fo_chown and fo_chmod methods to struct fileops and use them 2011-08-16 20:07:47 +00:00
vfs_vnops.c Generalize ffs_pages_remove() into vn_pages_remove(). 2011-08-25 08:17:39 +00:00
vnode_if.src Correctly use INOUT for the offset/len parameters to vop_allocate. As 2011-05-13 14:29:28 +00:00