Andrey Vagin 84c751bd4a ptrace: add ability to retrieve signals without removing from a queue (v4) ... This patch adds a new ptrace request PTRACE_PEEKSIGINFO. This request is used to retrieve information about pending signals starting with the specified sequence number. Siginfo_t structures are copied from the child into the buffer starting at "data". The argument "addr" is a pointer to struct ptrace_peeksiginfo_args. struct ptrace_peeksiginfo_args { u64 off; /* from which siginfo to start */ u32 flags; s32 nr; /* how may siginfos to take */ }; "nr" has type "s32", because ptrace() returns "long", which has 32 bits on i386 and a negative values is used for errors. Currently here is only one flag PTRACE_PEEKSIGINFO_SHARED for dumping signals from process-wide queue. If this flag is not set, signals are read from a per-thread queue. The request PTRACE_PEEKSIGINFO returns a number of dumped signals. If a signal with the specified sequence number doesn't exist, ptrace returns zero. The request returns an error, if no signal has been dumped. Errors: EINVAL - one or more specified flags are not supported or nr is negative EFAULT - buf or addr is outside your accessible address space. A result siginfo contains a kernel part of si_code which usually striped, but it's required for queuing the same siginfo back during restore of pending signals. This functionality is required for checkpointing pending signals. Pedro Alves suggested using it in "gdb" to peek at pending signals. gdb already uses PTRACE_GETSIGINFO to get the siginfo for the signal which was already dequeued. This functionality allows gdb to look at the pending signals which were not reported yet. The prototype of this code was developed by Oleg Nesterov. Signed-off-by: Andrew Vagin <avagin@openvz.org> Cc: Roland McGrath <roland@redhat.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: David Howells <dhowells@redhat.com> Cc: Dave Jones <davej@redhat.com> Cc: "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> Cc: Pavel Emelyanov <xemul@parallels.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Pedro Alves <palves@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2013-04-30 17:04:05 -07:00
..
byteorder	…
caif	…
can	can: gw: indicate and count deleted frames due to misconfiguration	2013-01-26 16:59:02 +01:00
dvb	[media] demux.h: Remove duplicated enum	2013-04-08 06:53:15 -03:00
hdlc	…
hsi	…
isdn	…
mmc	…
netfilter	netfilter: xt_CT: add alias flag	2013-02-05 01:49:26 +01:00
netfilter_arp	…
netfilter_bridge	…
netfilter_ipv4	…
netfilter_ipv6	…
nfsd	…
raid	UAPI: fix endianness conditionals in linux/raid/md_p.h	2013-03-13 15:21:49 -07:00
spi	…
sunrpc	…
tc_act	…
tc_ematch	…
usb	USB: fix an incorrect table index in comment	2013-04-08 09:08:34 -07:00
wimax	…
Kbuild	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-next into for-linus-3.9	2013-02-20 14:05:45 -05:00
a.out.h	…
acct.h	UAPI: fix endianness conditionals in linux/acct.h	2013-03-13 15:21:48 -07:00
adb.h	…
adfs_fs.h	…
affs_hardblocks.h	…
agpgart.h	…
aio_abi.h	UAPI: fix endianness conditionals in linux/aio_abi.h	2013-03-13 15:21:48 -07:00
apm_bios.h	…
arcfb.h	…
atalk.h	…
atm.h	…
atm_eni.h	…
atm_he.h	…
atm_idt77105.h	…
atm_nicstar.h	…
atm_tcp.h	…
atm_zatm.h	…
atmapi.h	…
atmarp.h	…
atmbr2684.h	…
atmclip.h	…
atmdev.h	…
atmioc.h	…
atmlec.h	…
atmmpc.h	…
atmppp.h	…
atmsap.h	…
atmsvc.h	…
audit.h	linux/audit.h: move ptrace.h include to kernel header	2013-01-11 14:54:56 -08:00
auto_fs.h	unbreak automounter support on 64-bit kernel with 32-bit userspace (v2)	2013-02-08 20:42:18 +01:00
auto_fs4.h	…
auxvec.h	…
ax25.h	…
b1lli.h	…
baycom.h	…
bfs_fs.h	…
binfmts.h	…
blkpg.h	…
blktrace_api.h	…
bpqether.h	…
bsg.h	…
btrfs.h	Btrfs: set/change the label of a mounted file system	2013-02-20 12:59:59 -05:00
can.h	…
capability.h	…
capi.h	…
cciss_defs.h	…
cciss_ioctl.h	…
cdrom.h	libata: identify and init ZPODD devices	2013-01-21 15:40:35 -05:00
cgroupstats.h	…
chio.h	…
cm4000_cs.h	…
cn_proc.h	…
coda.h	…
coda_psdev.h	…
coff.h	…
connector.h	Drivers: hv: Add a new driver to support host initiated backup	2013-03-15 12:12:36 -07:00
const.h	…
cramfs_fs.h	…
cuda.h	…
cyclades.h	…
cycx_cfm.h	…
dcbnl.h	…
dccp.h	…
dlm.h	…
dlm_device.h	…
dlm_netlink.h	…
dlm_plock.h	…
dlmconstants.h	…
dm-ioctl.h	dm ioctl: allow message to return data	2013-03-01 22:45:49 +00:00
dm-log-userspace.h	…
dn.h	…
dqblk_xfs.h	…
edd.h	…
efs_fs_sb.h	…
elf-em.h	…
elf-fdpic.h	…
elf.h	metag: ptrace: Implement NT_METAG_TLS	2013-03-27 14:37:47 +00:00
elfcore.h	…
errno.h	…
errqueue.h	…
ethtool.h	…
eventpoll.h	…
fadvise.h	…
falloc.h	…
fanotify.h	…
fb.h	…
fcntl.h	…
fd.h	…
fdreg.h	…
fib_rules.h	…
fiemap.h	…
filter.h	…
firewire-cdev.h	…
firewire-constants.h	…
flat.h	…
fs.h	mm: make snapshotting pages for stable writes a per-bio operation	2013-04-29 15:54:33 -07:00
fsl_hypervisor.h	…
fuse.h	fuse: fix type definitions in uapi header	2013-04-17 12:30:40 +02:00
futex.h	…
gameport.h	…
gen_stats.h	…
genetlink.h	…
gfs2_ondisk.h	…
gigaset_dev.h	…
hdlc.h	…
hdlcdrv.h	…
hdreg.h	…
hid.h	…
hiddev.h	…
hidraw.h	…
hpet.h	…
hw_breakpoint.h	…
hysdn_if.h	…
i2c-dev.h	…
i2c.h	…
i2o-dev.h	…
i8k.h	…
icmp.h	…
icmpv6.h	…
if.h	…
if_addr.h	…
if_addrlabel.h	…
if_alg.h	…
if_arcnet.h	…
if_arp.h	…
if_bonding.h	…
if_bridge.h	bridge: use __u16 in if_bridge.h	2013-02-14 00:54:17 -05:00
if_cablemodem.h	…
if_eql.h	…
if_ether.h	net/8021q: Implement Multiple VLAN Registration Protocol (MVRP)	2013-02-10 20:37:22 -05:00
if_fc.h	…
if_fddi.h	…
if_frad.h	…
if_hippi.h	…
if_infiniband.h	…
if_link.h	rtnl: expose carrier value with possibility to set it	2012-12-28 15:24:18 -08:00
if_ltalk.h	…
if_packet.h	…
if_phonet.h	…
if_plip.h	…
if_ppp.h	…
if_pppol2tp.h	…
if_pppox.h	…
if_slip.h	…
if_team.h	…
if_tun.h	…
if_tunnel.h	…
if_vlan.h	net/8021q: Implement Multiple VLAN Registration Protocol (MVRP)	2013-02-10 20:37:22 -05:00
if_x25.h	…
igmp.h	…
in.h	…
in6.h	mcast: define and use MRT[6]_MAX in ip[6]_mroute_opt()	2013-01-21 13:55:14 -05:00
in_route.h	…
inet_diag.h	…
inotify.h	…
input.h	…
ioctl.h	…
ip.h	…
ip6_tunnel.h	…
ip_vs.h	…
ipc.h	…
ipmi.h	ipmi: remove superfluous kernel/userspace explanation	2013-02-27 19:10:21 -08:00
ipmi_msgdefs.h	…
ipsec.h	…
ipv6.h	ipv6: Store Router Alert option in IP6CB directly.	2013-01-13 20:17:14 -05:00
ipv6_route.h	…
ipx.h	…
irda.h	…
irqnr.h	…
isdn.h	…
isdn_divertif.h	…
isdn_ppp.h	…
isdnif.h	…
iso_fs.h	…
ivtv.h	…
ivtvfb.h	…
ixjuser.h	…
jffs2.h	…
joystick.h	…
kd.h	…
kdev_t.h	…
kernel-page-flags.h	…
kernel.h	…
kernelcapi.h	…
kexec.h	…
keyboard.h	…
keyctl.h	…
kvm.h	Merge tag 'kvm-3.9-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm	2013-02-24 13:07:18 -08:00
kvm_para.h	…
l2tp.h	…
limits.h	…
llc.h	…
loop.h	…
lp.h	…
magic.h	Introduce a new file system, Flash-Friendly File System (F2FS), to Linux 3.8.	2012-12-20 13:54:52 -08:00
major.h	…
map_to_7segment.h	…
matroxfb.h	…
mdio.h	…
media.h	[media] media: add support for decoder as one of media entity types	2013-03-21 14:05:31 -03:00
mei.h	…
mempolicy.h	…
meye.h	[media] meye: convert to the control framework	2013-02-05 18:23:47 -02:00
mii.h	…
minix_fs.h	…
mman.h	…
mmtimer.h	…
module.h	…
mqueue.h	…
mroute.h	mcast: add multicast proxy support (IPv4 and IPv6)	2013-01-21 13:55:14 -05:00
mroute6.h	mcast: add multicast proxy support (IPv4 and IPv6)	2013-01-21 13:55:14 -05:00
msdos_fs.h	fat: mark fs as dirty on mount and clean on umount	2013-02-27 19:10:11 -08:00
msg.h	ipc: introduce message queue copy feature	2013-01-04 16:11:45 -08:00
mtio.h	…
n_r3964.h	…
nbd.h	nbd: support FLUSH requests	2013-02-27 19:10:22 -08:00
ncp.h	…
ncp_fs.h	…
ncp_mount.h	…
ncp_no.h	…
neighbour.h	bridge: Add vlan support to static neighbors	2013-02-13 19:42:16 -05:00
net.h	…
net_dropmon.h	…
net_tstamp.h	…
netconf.h	…
netdevice.h	…
netfilter.h	…
netfilter_arp.h	…
netfilter_bridge.h	…
netfilter_decnet.h	…
netfilter_ipv4.h	…
netfilter_ipv6.h	…
netlink.h	…
netrom.h	…
nfc.h	NFC: Change nfc.h license	2013-01-14 12:28:54 +01:00
nfs.h	…
nfs2.h	…
nfs3.h	…
nfs4.h	…
nfs4_mount.h	…
nfs_fs.h	…
nfs_idmap.h	…
nfs_mount.h	…
nfsacl.h	…
nl80211.h	nl80211: renumber NL80211_FEATURE_FULL_AP_CLIENT_STATE	2013-02-15 09:41:44 +01:00
nubus.h	…
nvram.h	…
omap3isp.h	…
omapfb.h	…
oom.h	…
packet_diag.h	net: fix *_DIAG_MAX constants	2013-03-21 12:36:33 -04:00
param.h	…
parport.h	…
patchkey.h	…
pci.h	…
pci_regs.h	PCI: Clean up MSI/MSI-X capability #defines	2013-04-23 09:50:30 -06:00
perf_event.h	perf: Fix comments in PERF_MEM_LVL bitmask	2013-04-08 13:54:24 +02:00
personality.h	…
pfkeyv2.h	…
pg.h	…
phantom.h	…
phonet.h	…
pkt_cls.h	…
pkt_sched.h	…
pktcdvd.h	…
pmu.h	…
poll.h	…
posix_types.h	…
ppdev.h	…
ppp-comp.h	…
ppp-ioctl.h	…
ppp_defs.h	…
pps.h	…
prctl.h	…
ptp_clock.h	…
ptrace.h	ptrace: add ability to retrieve signals without removing from a queue (v4)	2013-04-30 17:04:05 -07:00
qnx4_fs.h	…
qnxtypes.h	…
quota.h	…
radeonfb.h	…
random.h	…
raw.h	…
rds.h	…
reboot.h	…
reiserfs_fs.h	…
reiserfs_xattr.h	…
resource.h	…
rfkill.h	…
romfs_fs.h	…
rose.h	…
route.h	…
rtc.h	…
rtnetlink.h	bridge: Dump vlan information from a bridge port	2013-02-13 19:41:46 -05:00
scc.h	…
sched.h	…
screen_info.h	…
sdla.h	…
seccomp.h	…
securebits.h	…
selinux_netlink.h	…
sem.h	…
serial.h	…
serial_core.h	tty/serial: Add support for Altera serial port	2013-03-12 08:53:23 -07:00
serial_reg.h	…
serio.h	…
shm.h	…
signal.h	unify SS_ONSTACK/SS_DISABLE definitions	2012-12-19 18:07:39 -05:00
signalfd.h	…
snmp.h	xfrm: removes a superfluous check and add a statistic	2013-01-07 11:18:58 +01:00
sock_diag.h	…
socket.h	…
sockios.h	…
som.h	…
sonet.h	…
sonypi.h	…
sound.h	…
soundcard.h	…
stat.h	…
stddef.h	…
string.h	…
suspend_ioctls.h	…
swab.h	…
synclink.h	…
sysctl.h	…
sysinfo.h	…
taskstats.h	…
tcp.h	tcp: set and get per-socket timestamp	2013-02-13 13:22:15 -05:00
tcp_metrics.h	…
telephony.h	…
termios.h	…
time.h	timekeeping: Add CLOCK_TAI clockid	2013-03-22 16:19:59 -07:00
times.h	…
timex.h	…
tiocl.h	…
tipc.h	…
tipc_config.h	…
toshiba.h	…
tty.h	…
tty_flags.h	…
types.h	…
udf_fs_i.h	…
udp.h	…
uhid.h	HID: uhid: use __packed__ for uhid_feature_answer_req	2013-01-03 10:38:24 +01:00
uinput.h	…
uio.h	…
ultrasound.h	…
un.h	…
unistd.h	…
unix_diag.h	net: fix *_DIAG_MAX constants	2013-03-21 12:36:33 -04:00
usbdevice_fs.h	…
utime.h	…
utsname.h	…
uuid.h	…
uvcvideo.h	…
v4l2-common.h	…
v4l2-controls.h	[media] V4L: Add MATRIX option to V4L2_CID_EXPOSURE_METERING control	2013-03-31 10:55:19 -03:00
v4l2-dv-timings.h	[media] v4l2-dv-timings.h: add 480i59.94 and 576i50 CEA-861-E timings	2013-04-14 19:56:36 -03:00
v4l2-mediabus.h	[media] soc_camera: Add RGB666 & RGB888 formats	2013-04-04 19:40:08 -03:00
v4l2-subdev.h	…
veth.h	…
vfio.h	vfio-pci: Add support for VGA region access	2013-02-18 10:11:13 -07:00
vhost.h	…
videodev2.h	[media] videodev2.h: Remove the unused old V4L1 buffer types	2013-04-25 10:29:14 -03:00
virtio_9p.h	…
virtio_balloon.h	…
virtio_blk.h	…
virtio_config.h	…
virtio_console.h	…
virtio_ids.h	…
virtio_net.h	virtio-net: introduce a new control to set macaddr	2013-01-21 14:07:44 -05:00
virtio_pci.h	…
virtio_ring.h	…
virtio_rng.h	…
vm_sockets.h	VSOCK: Remove hypervisor-only socket option	2013-02-18 15:02:51 -05:00
vt.h	…
wait.h	…
wanrouter.h	wanrouter: delete now orphaned header content, files/drivers	2013-01-31 19:56:35 -05:00
watchdog.h	…
wimax.h	…
wireless.h	…
x25.h	…
xattr.h	hfsplus: add osx.* prefix for handling namespace of Mac OS X extended attributes	2013-02-27 19:10:10 -08:00
xfrm.h	…