Daniel Xu dd6e10fbd9 bpf: Add bpf_task_pt_regs() helper ... The motivation behind this helper is to access userspace pt_regs in a kprobe handler. uprobe's ctx is the userspace pt_regs. kprobe's ctx is the kernelspace pt_regs. bpf_task_pt_regs() allows accessing userspace pt_regs in a kprobe handler. The final case (kernelspace pt_regs in uprobe) is pretty rare (usermode helper) so I think that can be solved later if necessary. More concretely, this helper is useful in doing BPF-based DWARF stack unwinding. Currently the kernel can only do framepointer based stack unwinds for userspace code. This is because the DWARF state machines are too fragile to be computed in kernelspace [0]. The idea behind DWARF-based stack unwinds w/ BPF is to copy a chunk of the userspace stack (while in prog context) and send it up to userspace for unwinding (probably with libunwind) [1]. This would effectively enable profiling applications with -fomit-frame-pointer using kprobes and uprobes. [0]: https://lkml.org/lkml/2012/2/10/356 [1]: https://github.com/danobi/bpf-dwarf-walk Signed-off-by: Daniel Xu <dxu@dxuuu.xyz> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/e2718ced2d51ef4268590ab8562962438ab82815.1629772842.git.dxu@dxuuu.xyz		2021-08-25 10:37:05 -07:00
..
android	binder: tell userspace to dump current backtrace when detected oneway spamming	2021-04-10 10:52:04 +02:00
byteorder
caif
can	can: j1939: extend UAPI to notify about RX status	2021-08-04 12:11:52 +02:00
cifs
dvb	media: dvb header files: move some headers to staging	2021-06-04 08:07:30 +02:00
genwqe
hdlc
hsi
iio	iio: buffer: add ioctl() to support opening extra buffers for IIO device	2021-03-11 20:47:05 +00:00
isdn
misc
mmc
netfilter	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2021-08-13 06:41:22 -07:00
netfilter_arp
netfilter_bridge
netfilter_ipv4
netfilter_ipv6
nfsd	UAPI: nfsfh.h: Replace one-element array with flexible-array member	2021-03-31 15:59:14 -04:00
raid
sched
spi
sunrpc
surface_aggregator	platform/surface: aggregator_cdev: Allow enabling of events from user-space	2021-06-16 17:47:53 +02:00
tc_act	net/sched: act_skbmod: Add SKBMOD_F_ECN option support	2021-07-28 13:19:31 +01:00
tc_ematch
usb	usb: webcam: Invalid size of Processing Unit Descriptor	2021-03-18 09:02:27 +01:00
a.out.h
acct.h
acrn.h	virt: acrn: Introduce irqfd	2021-02-09 10:58:19 +01:00
adb.h
adfs_fs.h
affs_hardblocks.h
agpgart.h
aio_abi.h
am437x-vpfe.h
apm_bios.h
arcfb.h
arm_sdei.h
aspeed-lpc-ctrl.h
aspeed-p2a-ctrl.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	audit: remove trailing spaces and tabs	2021-06-10 20:59:05 -04:00
auto_dev-ioctl.h
auto_fs.h
auto_fs4.h
auxvec.h	uapi/auxvec: Define the aux vector AT_MINSIGSTKSZ	2021-05-19 11:40:15 +02:00
ax25.h
batadv_packet.h
batman_adv.h
baycom.h
bcache.h
bcm933xx_hcs.h
bfs_fs.h
binfmts.h	binfmt_misc: pass binfmt_misc flags to the interpreter	2021-02-15 18:28:30 +01:00
blkpg.h	block: update a few comments in uapi/linux/blkpg.h	2021-04-02 11:18:30 -06:00
blktrace_api.h
blkzoned.h
bpf.h	bpf: Add bpf_task_pt_regs() helper	2021-08-25 10:37:05 -07:00
bpf_common.h
bpf_perf_event.h
bpfilter.h
bpqether.h
bsg.h
bt-bmc.h
btf.h	bpf: Add BTF_KIND_FLOAT to uapi	2021-03-04 17:58:15 -08:00
btrfs.h	btrfs: fix typos in comments	2021-06-22 14:11:57 +02:00
btrfs_tree.h	btrfs: fix typos in comments	2021-06-22 14:11:57 +02:00
can.h	can: uapi: introduce CANFD_FDF flag for mixed content in struct canfd_frame	2021-05-27 09:42:21 +02:00
capability.h	capabilities: require CAP_SETFCAP to map uid 0	2021-04-20 14:28:33 -07:00
capi.h
cciss_defs.h
cciss_ioctl.h
ccs.h
cdrom.h
cec-funcs.h	media: uapi/linux/cec-funcs.h: set delay to 1 if unnused	2021-06-02 14:08:09 +02:00
cec.h	media: core headers: fix kernel-doc warnings	2021-03-22 10:22:22 +01:00
cfm_bridge.h
cgroupstats.h
chio.h
close_range.h
cm4000_cs.h
cn_proc.h
coda.h
coff.h
connector.h
const.h
coresight-stm.h
cramfs_fs.h
cryptouser.h
cuda.h
cxl_mem.h	cxl/pci: Add media provisioning required commands	2021-06-14 23:54:53 -07:00
cycx_cfm.h
dcbnl.h
dccp.h
devlink.h	devlink: Allow setting parent node of rate objects	2021-06-02 14:08:37 -07:00
dlm.h
dlm_device.h
dlm_netlink.h
dlm_plock.h
dlmconstants.h
dm-ioctl.h	dm ioctl: return UUID in DM_LIST_DEVICES_CMD result	2021-03-26 14:53:41 -04:00
dm-log-userspace.h
dma-buf.h
dma-heap.h
dn.h
dns_resolver.h
dqblk_xfs.h	quota: report warning limits for realtime space quotas	2021-03-18 17:03:54 +01:00
edd.h
efs_fs_sb.h
elf-em.h
elf-fdpic.h
elf.h	arm64: Introduce prctl(PR_PAC_{SET,GET}_ENABLED_KEYS)	2021-04-13 17:31:44 +01:00
errno.h
errqueue.h
erspan.h
ethtool.h	net: fix mistake path for netdev_features_strings	2021-06-17 11:32:50 -07:00
ethtool_netlink.h	ethtool: add a new command for getting PHC virtual clocks	2021-07-01 13:08:18 -07:00
eventpoll.h
f2fs.h
fadvise.h
falloc.h
fanotify.h
fb.h
fcntl.h
fd.h	floppy: cleanups: remove trailing whitespaces	2021-04-20 08:59:03 -06:00
fdreg.h
fib_rules.h
fiemap.h
filter.h
firewire-cdev.h	include/linux: remove repeated words	2021-02-26 09:41:03 -08:00
firewire-constants.h
fou.h
fpga-dfl.h
fs.h	block: uapi: fix comment about block device ioctl	2021-05-10 09:26:18 -06:00
fscrypt.h
fsi.h
fsl_hypervisor.h
fsl_mc.h
fsmap.h
fsverity.h
fuse.h	virtiofs: propagate sync() to file server	2021-06-22 09:15:35 +02:00
futex.h	futex: Provide FUTEX_LOCK_PI2 to support clock selection	2021-06-22 16:42:09 +02:00
gameport.h
gen_stats.h
genetlink.h
gfs2_ondisk.h
gpio.h	gpio: uapi: use the preferred SPDX license identifier	2021-02-15 11:43:33 +01:00
gsmmux.h
gtp.h
hash_info.h
hdlc.h
hdlcdrv.h
hdreg.h
hid.h
hiddev.h
hidraw.h
hpet.h
hsr_netlink.h
hw_breakpoint.h
hyperv.h
i2c-dev.h
i2c.h
i2o-dev.h
i8k.h
icmp.h	icmp: fix lib conflict with trinity	2021-06-03 15:31:34 -07:00
icmpv6.h	ICMPV6: add support for RFC 8335 PROBE	2021-03-30 13:29:39 -07:00
idxd.h	dmaengine: idxd: Change license on idxd.h to LGPL	2021-07-28 10:22:43 -07:00
if.h
if_addr.h
if_addrlabel.h
if_alg.h
if_arcnet.h
if_arp.h	mctp: Add initial driver infrastructure	2021-07-29 15:06:50 +01:00
if_bonding.h	treewide: remove editor modelines and cruft	2021-05-07 00:26:34 -07:00
if_bridge.h	net: bridge: vlan: use br_rports_fill_info() to export mcast router ports	2021-08-11 13:34:41 +01:00
if_cablemodem.h
if_eql.h
if_ether.h	mctp: Add device handling and netlink interface	2021-07-29 15:06:50 +01:00
if_fc.h
if_fddi.h	FDDI: if_fddi.h: Update my e-mail address	2021-03-10 12:45:16 -08:00
if_hippi.h
if_infiniband.h
if_link.h	bonding: add new option lacp_active	2021-08-03 11:50:22 +01:00
if_ltalk.h
if_macsec.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
if_x25.h
if_xdp.h
ife.h
igmp.h
ila.h
in.h	net/ipv4/ipv6: Replace one-element arraya with flexible-array members	2021-08-05 11:46:42 +01:00
in6.h	ipv6: ioam: Data plane support for Pre-allocated Trace	2021-07-21 08:14:33 -07:00
in_route.h
inet_diag.h
inotify.h
input-event-codes.h	HID: hid-input: add mapping for emoji picker key	2021-05-05 14:31:05 +02:00
input.h	include/linux: remove repeated words	2021-02-26 09:41:03 -08:00
io_uring.h	io_uring: simplify struct io_uring_sqe layout	2021-06-30 14:15:39 -06:00
ioam6.h	ipv6: ioam: Support for IOAM injection with lwtunnels	2021-07-21 08:14:33 -07:00
ioam6_genl.h	ipv6: ioam: IOAM Generic Netlink API	2021-07-21 08:14:33 -07:00
ioam6_iptunnel.h	ipv6: ioam: Support for IOAM injection with lwtunnels	2021-07-21 08:14:33 -07:00
ioctl.h
iommu.h	iommu/vt-d: Enable write protect propagation from guest	2021-03-18 11:42:46 +01:00
ip.h
ip6_tunnel.h
ip_vs.h
ipc.h
ipmi.h
ipmi_bmc.h
ipmi_msgdefs.h
ipsec.h
ipv6.h	ipv6: ioam: Data plane support for Pre-allocated Trace	2021-07-21 08:14:33 -07:00
ipv6_route.h
ipx.h
irqnr.h
iso_fs.h
isst_if.h
ivtv.h
ivtvfb.h
jffs2.h
joystick.h
kcm.h
kcmp.h
kcov.h
kd.h
kdev_t.h
kernel-page-flags.h
kernel.h
kernelcapi.h
kexec.h	RISC-V: Add EM_RISCV to kexec UAPI header	2021-04-26 08:25:20 -07:00
keyboard.h
keyctl.h
kfd_ioctl.h	drm/amdkfd: add ioctl to configure and query xnack retries	2021-04-20 21:47:48 -04:00
kvm.h	KVM/arm64 updates for v5.14.	2021-06-25 11:24:24 -04:00
kvm_para.h	KVM: X86: Introduce KVM_HC_MAP_GPA_RANGE hypercall	2021-06-17 14:25:39 -04:00
l2tp.h	net: l2tp: reduce log level of messages in receive path, add counter instead	2021-03-03 16:55:02 -08:00
landlock.h	landlock: Enable user space to infer supported features	2021-04-22 12:22:11 -07:00
libc-compat.h
lightnvm.h	lightnvm: remove duplicate include in lightnvm.h	2021-04-13 09:16:12 -06:00
limits.h
lirc.h	media: lirc: remove out of date comment	2021-05-21 15:03:50 +02:00
llc.h
loop.h
lp.h
lwtunnel.h	ipv6: ioam: Support for IOAM injection with lwtunnels	2021-07-21 08:14:33 -07:00
magic.h	mm: introduce memfd_secret system call to create "secret" memory areas	2021-07-08 11:48:21 -07:00
major.h	tty: cyclades, remove this orphan	2021-03-10 09:34:06 +01:00
map_to_7segment.h	uapi: map_to_7segment: Remove licence boilerplate	2021-03-24 08:26:29 +01:00
matroxfb.h
max2175.h
mctp.h	mctp: Allow per-netns default networks	2021-07-29 15:06:50 +01:00
mdio.h	net: phy: add constants for 2.5G and 5G speed in PCS speed register	2021-04-08 13:15:33 -07:00
media-bus-format.h
media.h
mei.h
membarrier.h
memfd.h
mempolicy.h	mm/mempolicy: don't handle MPOL_LOCAL like a fake MPOL_PREFERRED policy	2021-06-30 20:47:29 -07:00
meye.h
mii.h
minix_fs.h
mman.h
mmtimer.h
module.h
mount.h	mount: Support "nosymfollow" in new mount api	2021-06-01 12:09:27 +02:00
mpls.h
mpls_iptunnel.h
mptcp.h	mptcp: add csum_enabled in mptcp_sock	2021-06-18 11:40:11 -07:00
mqueue.h
mroute.h
mroute6.h
mrp_bridge.h
msdos_fs.h
msg.h
mtio.h
nbd-netlink.h	nbd: provide a way for userspace processes to identify device backends	2021-06-30 15:34:04 -06:00
nbd.h
ncsi.h
ndctl.h
neighbour.h	net: bridge: fix flags interpretation for extern learn fdb entries	2021-08-10 11:29:39 -07:00
net.h	Revert "net: add pf_family_names[] for protocol family"	2021-06-18 13:02:45 -07:00
net_dropmon.h
net_namespace.h
net_tstamp.h	net: sock: extend SO_TIMESTAMPING for PHC binding	2021-07-01 13:08:18 -07:00
netconf.h
netdevice.h
netfilter.h
netfilter_arp.h
netfilter_bridge.h
netfilter_decnet.h
netfilter_ipv4.h
netfilter_ipv6.h
netlink.h	netlink: simplify NLMSG_DATA with NLMSG_HDRLEN	2021-06-10 12:51:33 -07:00
netlink_diag.h
netrom.h
nexthop.h	nexthop: Add netlink defines and enumerators for resilient NH groups	2021-03-11 16:12:59 -08:00
nfc.h
nfs.h
nfs2.h
nfs3.h
nfs4.h	treewide: remove editor modelines and cruft	2021-05-07 00:26:34 -07:00
nfs4_mount.h
nfs_fs.h
nfs_idmap.h
nfs_mount.h
nfsacl.h
nilfs2_api.h
nilfs2_ondisk.h
nitro_enclaves.h
nl80211.h	cfg80211: allow advertising vendor-specific capabilities	2021-06-23 13:05:09 +02:00
nsfs.h
nubus.h
nvme_ioctl.h
nvram.h
omap3isp.h
omapfb.h
oom.h
openat2.h
openvswitch.h	openvswitch: fix alignment issues	2021-07-27 11:48:42 +01:00
packet_diag.h
param.h
parport.h
patchkey.h
pci.h
pci_regs.h
pcitest.h	PCI: Fix kernel-doc formatting	2021-07-06 10:37:46 -05:00
perf_event.h	Merge branch 'for-v5.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2021-05-21 06:12:52 -10:00
personality.h
pfkeyv2.h
pg.h
phantom.h
phonet.h
pidfd.h
pkt_cls.h	net_sched: refactor TC action init API	2021-08-02 10:24:38 +01:00
pkt_sched.h
pktcdvd.h
pmu.h
poll.h
posix_acl.h
posix_acl_xattr.h
posix_types.h
ppdev.h
ppp-comp.h
ppp-ioctl.h
ppp_defs.h
pps.h
pr.h
prctl.h	sched: prctl() core-scheduling interface	2021-05-12 11:43:31 +02:00
psample.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2021-03-25 15:31:22 -07:00
psci.h
psp-sev.h
ptp_clock.h
ptrace.h	rseq, ptrace: Add PTRACE_GET_RSEQ_CONFIGURATION request	2021-03-17 16:15:39 +01:00
qemu_fw_cfg.h
qnx4_fs.h
qnxtypes.h
qrtr.h
quota.h
radeonfb.h
random.h
rds.h
reboot.h
reiserfs_fs.h
reiserfs_xattr.h
remoteproc_cdev.h
resource.h
rfkill.h	rfkill: revert back to old userspace API by default	2021-04-08 10:14:45 +02:00
rio_cm_cdev.h
rio_mport_cdev.h
rkisp1-config.h	media: rkisp1: uapi: document which flags/structs relate to statistics config	2021-04-06 10:29:56 +02:00
romfs_fs.h
rose.h
route.h
rpl.h
rpl_iptunnel.h
rpmsg.h	rpmsg: Add short description of the IOCTL defined in UAPI.	2021-03-17 14:16:26 -05:00
rpmsg_types.h
rseq.h
rtc.h
rtnetlink.h	Add Open Routing Protocol ID to rtnetlink.h	2021-03-24 16:31:23 -07:00
rxrpc.h
scc.h
sched.h
scif_ioctl.h
screen_info.h
sctp.h	sctp: add SCTP_PLPMTUD_PROBE_INTERVAL sockopt for sock/asoc/transport	2021-06-22 11:28:51 -07:00
seccomp.h	seccomp: Support atomic "addfd + send reply"	2021-06-28 12:49:52 -07:00
securebits.h
sed-opal.h
seg6.h
seg6_genl.h
seg6_hmac.h
seg6_iptunnel.h
seg6_local.h	seg6: add support for SRv6 End.DT46 Behavior	2021-06-18 11:35:47 -07:00
selinux_netlink.h
sem.h
serial.h	tty: cyclades, remove this orphan	2021-03-10 09:34:06 +01:00
serial_core.h
serial_reg.h
serio.h
shm.h
signal.h
signalfd.h	signalfd: Remove SIL_PERF_EVENT fields from signalfd_siginfo	2021-05-18 16:20:54 -05:00
smc.h	net/smc: Add netlink support for SMC fallback statistics	2021-06-16 12:54:02 -07:00
smc_diag.h
smiapp.h
snmp.h	tcp: Add stats for socket migration.	2021-06-23 12:56:08 -07:00
sock_diag.h
socket.h	sock: allow reading and changing sk_userlocks with setsockopt	2021-08-04 12:52:03 +01:00
sockios.h
sonet.h
sonypi.h
sound.h
soundcard.h
stat.h
stddef.h
stm.h
string.h
suspend_ioctls.h
swab.h
switchtec_ioctl.h
sync_file.h
synclink.h
sysctl.h
sysinfo.h
target_core_user.h
taskstats.h
tcp.h	tcp: Sanitize CMSG flags and reserved args in tcp_zerocopy_receive.	2021-02-11 18:25:05 -08:00
tcp_metrics.h
tee.h
termios.h
thermal.h	thermal: Fix spelling mistake "disabed" -> "disabled"	2021-03-11 12:13:08 +01:00
time.h
time_types.h
timerfd.h
times.h
timex.h
tiocl.h
tipc.h
tipc_config.h
tipc_netlink.h
tipc_sockets_diag.h
tls.h
toshiba.h
tty.h
tty_flags.h	tty: add ASYNC_SPLIT_TERMIOS to deprecation mask	2021-04-10 10:36:34 +02:00
types.h
udf_fs_i.h
udmabuf.h
udp.h
uhid.h
uinput.h
uio.h
uleds.h
ultrasound.h
um_timetravel.h
un.h
unistd.h
unix_diag.h
usbdevice_fs.h
usbip.h
userfaultfd.h	userfaultfd/shmem: advertise shmem minor fault support	2021-06-30 20:47:27 -07:00
userio.h
utime.h
utsname.h
uuid.h
uvcvideo.h	media: vpbe_osd.h/uvcvideo.h includes: fix trivial kernel-doc warnings	2021-03-22 10:24:07 +01:00
v4l2-common.h
v4l2-controls.h	media: vicodec: Use _BITUL() macro in UAPI headers	2021-06-02 14:09:05 +02:00
v4l2-dv-timings.h
v4l2-mediabus.h
v4l2-subdev.h	media: core headers: fix kernel-doc warnings	2021-03-22 10:22:22 +01:00
vbox_err.h
vbox_vmmdev_types.h
vboxguest.h
vdpa.h	vdpa: Enable user to query vdpa device info	2021-02-23 07:52:56 -05:00
veth.h
vfio.h	vfio/pci: Revert nvlink removal uAPI breakage	2021-05-05 10:19:41 -06:00
vfio_ccw.h
vfio_zdev.h
vhost.h
vhost_types.h
videodev2.h	media: uapi: move MPEG-2 stateless controls out of staging	2021-05-23 19:21:31 +02:00
virtio_9p.h
virtio_balloon.h
virtio_blk.h
virtio_bt.h	Bluetooth: Add support for virtio transport driver	2021-04-08 12:26:34 +02:00
virtio_config.h
virtio_console.h
virtio_crypto.h
virtio_fs.h
virtio_gpu.h
virtio_ids.h	virtio: update virtio id table, add transitional ids	2021-07-03 04:50:51 -04:00
virtio_input.h
virtio_iommu.h
virtio_mem.h
virtio_mmio.h
virtio_net.h
virtio_pci.h
virtio_pcidev.h	um: add PCI over virtio emulation driver	2021-06-17 21:45:43 +02:00
virtio_pmem.h
virtio_ring.h
virtio_rng.h
virtio_scsi.h
virtio_snd.h	ALSA: virtio: add virtio sound driver	2021-03-07 09:07:16 +01:00
virtio_types.h
virtio_vsock.h	virtio/vsock: defines and constants for SEQPACKET	2021-06-11 13:32:47 -07:00
vm_sockets.h
vm_sockets_diag.h
vmcore.h
vsockmon.h
vt.h
vtpm_proxy.h
wait.h
watch_queue.h
watchdog.h
wireguard.h
wireless.h
wmi.h
wwan.h	wwan: add interface creation support	2021-06-12 13:16:45 -07:00
x25.h
xattr.h
xdp_diag.h
xfrm.h
xilinx-v4l2-controls.h
zorro.h
zorro_ids.h