bpf: update BPF_MAP_CREATE decoding

Implement decoding of union bpf_attr.numa_node field for BPF_MAP_CREATE
command introduced by linux kernel commit v4.14-rc1~130^2~196^2~1.

* configure.ac: Check for numa_node member of union bpf_attr
instead of inner_map_fd.
(decode_BPF_MAP_CREATE): Add numa_node field to the structure, print it.
* NEWS: Mention this.
* tests/bpf.c: Update macro guards of BPF_MAP_CREATE decoder test.
(init_BPF_MAP_CREATE_first, print_BPF_MAP_CREATE_attr): Update expected
output.
(init_BPF_MAP_CREATE_attr): Initialize numa_node field, update offset.

unwind.c: cleanup

* unwind.c (rebuild_cache_if_invalid): Simplify return statement.

unwind.c: fix typo in comment

* unwind.c (unwind_cache_invalidate, unwind_print_stacktrace,
unwind_capture_stacktrace): Replace strack with stack.

ipc_shm: decode hugetlb page size in shmget flags

Decode alternative hugetlb page sizes introduced by kernel commit
v3.8-rc1~175^2~36.

* ipc_shm.c [!SHM_HUGE_SHIFT] (SHM_HUGE_SHIFT): New macro.
[!SHM_HUGE_MASK] (SHM_HUGE_MASK): Likewise.
(SYS_FUNC(shmget)): Print hugetlb page size.
* tests/ipc_shm.c: Check it.

memfd_create: decode hugetlb page size

Decode alternative hugetlb page sizes introduced by kernel commit
v4.14-rc1~126^2~17.

* configure.ac (AC_CHECK_HEADERS): Add linux/memfd.h.
* memfd_create.c [HAVE_LINUX_MEMFD_H]: Include it.
[!MFD_HUGE_SHIFT] (MFD_HUGE_SHIFT): New macro.
[!MFD_HUGE_MASK] (MFD_HUGE_MASK): Likewise.
(SYS_FUNC(memfd_create)): Print hugetlb page size.
* tests/memfd_create.c: Check it.

Print the first argument of memfd_create syscall as a path

The limit imposed by the kernel on the length of memfd_create first
argument is NAME_MAX - strlen("memfd:").

* memfd_create.c (SYS_FUNC(memfd_create)): Print the first argument
using printpathn.
* tests/memfd_create.c: Check it.

mem: decode hugetlb page size in mmap flags

Decode alternative hugetlb page sizes introduced by kernel commit
v3.8-rc1~175^2~36.

* mem.c [!MAP_HUGE_SHIFT] (MAP_HUGE_SHIFT): New macro.
[!MAP_HUGE_MASK] (MAP_HUGE_MASK): Likewise.
(print_mmap_flags): Print hugetlb page size.
* NEWS: Mention it.
* tests/remap_file_pages.c: Check it.

mem: assume that MAP_TYPE is defined

Since linux kernel provided a definition of MAP_TYPE in <asm/mman.h>
as long ago as in v2.4.0, it's safe to assume that MAP_TYPE is defined.

* mem.c (print_mmap_flags) [!MAP_TYPE]: Remove.

mem: move printing of mmap_flags to a separate function

* mem.c (print_mmap_flags): New function.
(print_mmap, SYS_FUNC(remap_file_pages)): Use it.

Provide fallback definitions for SHM_EXEC constant

Although SHM_EXEC is available in <linux/shm.h> since kernel commit
v2.6.9-rc2~23^2~93^2~78, the glibc version of <sys/shm.h> did not
provide SHM_EXEC until commit glibc-2.10~238.

* xlat/shm_flags.in (SHM_EXEC): Add fallback definition.
* tests/shmxt.c (SHM_EXEC): Likewise.

Update SHM_* constants

* xlat/shm_flags.in: Add SHM_EXEC introduced by kernel commit
v2.6.9-rc2~23^2~93^2~78.
* xlat/shm_resource_flags.in: Add SHM_NORESERVE introduced by kernel
commit v2.6.15-rc1~622.
* NEWS: Mention this.
* tests/ipc_shm.c (main): Update expected output.
* tests/shmxt.c (main): Update expected output, check SHM_EXEC decoding.

Remove fallback definitions for SHM_STAT and SHM_INFO constants

These constants are universally available for quite a long time
and are used unconditionally in tests without any complaints.

* xlat/shmctl_flags.in: Remove fallback definitions.

net: fix SOL_NETLINK NETLINK_LIST_MEMBERSHIPS decoding

NETLINK_LIST_MEMBERSHIPS, unlike all other SOL_NETLINK options, requests
not just a single integer but an array of integers.  The kernel also
supports a zero optlen NETLINK_LIST_MEMBERSHIPS request.

* net.c (print_uint32): New function.
(print_getsockopt): Add ulen argument, rename len argument to rlen,
<SOL_NETLINK> Handle NETLINK_LIST_MEMBERSHIPS using print_array
and print_uint32.
(SYS_FUNC(getsockopt)): Pass ulen to print_getsockopt.
* tests/sockopt-sol_netlink.c (main): Check NETLINK_LIST_MEMBERSHIPS
decoding.

tests: check [gs]etsockopt SOL_NETLINK decoding

* tests/sockopt-sol_netlink.c: New file.
* tests/gen_tests.in (sockopt-sol_netlink): New entry.
* tests/pure_executables.list: Add sockopt-sol_netlink.
* tests/.gitignore: Likewise.

net: fix decoding of optval argument of [gs]etsockopt SOL_NETLINK

Tweak the parser to follow the kernel behaviour.

* net.c (print_getsockopt, print_setsockopt) <SOL_NETLINK>: Fetch and
print returned value as integer iff the length is >= sizeof(int),
otherwise print the address.
* NEWS: Mention this.

net: decode optname argument of [gs]etsockopt for SOL_NETLINK level

* xlat/socknetlinkoptions.in: New file.
* net.c: Include "xlat/socknetlinkoptions.h".
(print_sockopt_fd_level_name) <SOL_NETLINK>: Print name using
socknetlinkoptions.
* NEWS: Metnion this.

Update MSG_* constants

* xlat/msg_flags.in: Add MSG_ZEROCOPY introduced by kernel commit
v4.14-rc1~130^2~376^2~6.
* NEWS: Mention this.

netlink: print descriptor attributes using printfd

* nlattr.h (DECL_NLA(fd)): New prototype.
* nlattr.c (decode_nla_fd): New function.
* rtnl_link.c (ifla_xdp_nla_decoders) <IFLA_XDP_FD>: Use it.
(ifinfomsg_nla_decoders) <IFLA_NET_NS_FD>: Likewise.
* rtnl_nsid.c (rtgenmsg_nla_decoders) <NETNSA_FD>: Likewise.
* NEWS: Mention this.

maint/update_copyright_years.sh: implement concurrent execution

Analogous to the way it is done in xlat/gen.sh.

* maint/update_copyright_years.sh (MAX_JOBS): New variable, initialize
it to double the CPU count.
<while [ -n "${1:-}" ]; do case "$1" in>: Add -j option parsing.
(jobs, pids): New variables.
<git ls-files -- "$@" | grep -vFx "$IGNORED_FILES" | while read f; do>:
Execute process_file in background, count background jobs and wait
if there are too many.

maint/update_copyright_years.sh: use -efu shell mode

* maint/update_copyright_years.sh: Add -efu to shebang.  Adjust
the script for -efu shell mode.

Post-release administrivia

* NEWS: Add a header line for the next release.
* debian/changelog.in: Add a changelog entry for 4.20-1.
* strace.spec.in: Likewise.

Prepare for 4.20 release

* NEWS: Update for 4.20 release.

CREDITS.in: remove entries listed by maint/gen-contributors-list.sh

Makefile.am: use gen-contributors-list.sh for CREDITS

* Makefile.am ($(srcdir)/CREDITS): Employ maint/gen-contributors-list.sh
for the contributor list generation.

maint: make gen-contributors-list.sh suitable for generation of CREDITS

Implement various features in order to make it suitable for the
generation of the CREDITS file:
- add an option for including contributor e-mail;
- add an option to read additional list of contributors from stdin;
- add shorthand for referring to the initial commit of the branch;
- document all of the above in a help message.

* maint/gen-contributors-list.sh (print_help): New function.
(script): Rename to SCRIPT.
(SCRIPT_NORM_EMAILS, MATCH_OUT, OUT_EMAILS, OUT_NO_EMAILS, read_stdin,
include_email): New variables.
Add parsing of options, rewrite input processing.

.mailmap: add more entries to avoid duplication in CREDITS

.mailmap: sort entries

.mailmap: more deduplication

Of course there are no two persons in the whole world that share
the same name.

CREDITS.in: use UTF-8 consistently

In particular, do not use " symbols in names.

CREDITS.in: add Jiri Slaby as a contributor

Unfortunately, he wasn't mentioned in the message of the commit
v4.19-68-g48cb633, so let's fix that omission.

References: https://github.com/strace/strace/pull/16

s390, s390x: update ioctl entries from linux 4.14

* linux/s390/ioctls_arch0.h: Update from linux v4.14 using ioctls_gen.sh.
* linux/s390x/ioctls_arch0.h: Likewise.

s390x: remove some of non-s390 KVM ioctls

* linux/s390x/ioctls_arch0.h: Regenerate.

maint: remove KVM_PPC_CONFIGURE_V3_MMU ioctl from non-powerpc arches

* maint/ioctls_sym.sh (ppc_list): Update.

Update copyright headers

Headers updated semi-automatically using
maint/update_copyright_years.sh script.

* m4/mpers.m4: Update copyright years.
* tests/kcmp.c: Likewise.
* tests/membarrier.c: Likewise.

maint/update_copyright_years.sh: fix typo in help output

* maint/update_copyright_years.sh (print_help): Fix typo, disable
here-document expansion.

Move MIN, MAX, and CLAMP to macros.h

We shouldn't have to include the whole defs.h to get them.

* defs.h (MIN, MAX, CLAMP): Move ...
* macros.h: ... here.

Update .mailmap

* .mailmap (Eugene Syromyatnikov): Add work address.

debian: update debhelper compat level to 10, replace -s with -a in some calls

debian: update Standards-Version to 3.9.8

mpers.m4: check for size of long and kernel_long_t

The primary purpose of this new check is diagnostics.

* m4/mpers.m4 (st_MPERS): Check for size of long and kernel_long_t.

xlat/gen.sh: speedup xlat generation

This commit implements the following changes:
- increases the number of concurrent jobs to twice the CPU count;
- creates a circular buffer, so instead of running multiple jobs
  at once, the generator tries to keep about the same number of jobs
  being run concurrently;
- runs gen_git and gen_make concurrently in order to squeeze in
  one more bit of concurrency.

With my deeply scientific measurements, this approach achieves
up to 15% speedup with dash and about 30-40% with bash as /bin/sh
on a 4-core machine.

* xlat/gen.sh (main): Declare pids local variable, append pid of every
run job to it; increase the limit of jobs to ncpus * 2; when the limit
is reached, wait for the first pid in pids instead of resetting jobs
to zero and waiting for all the run jobs; put gen_git and gen_make
into background.

hppa: wire up statx syscall

* linux/hppa/syscallent.h [349]: Add statx entry.

tests: check signal mask transparency

Starting with commit v4.17-5-gf83b49b strace is expected
to forward the signal mask to tracees unchanged.

* tests/check_sigblock.c: New file.
* tests/set_sigblock.c: Likewise.
* tests/sigblock.test: New test.
* tests/.gitignore: Add check_sigblock and set_sigblock.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(MISC_TESTS): Add sigblock.test.

tests: check signal disposition transparency

Starting with commit v4.17-8-ge97a66f strace is expected
to forward the signal disposition to tracees unchanged.

* tests/check_sigign.c: New file.
* tests/list_sigaction_signum.c: Likewise.
* tests/set_sigign.c: Likewise.
* tests/sigign.test: New test.
* tests/.gitignore: Add check_sigign, list_sigaction_signum,
and set_sigign.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(MISC_TESTS): Add sigign.test.

tests: update futex test to accommodate the recent kernel change

Kernel commit v4.14-rc1~162^2~8 refactored futex implementation and
introduced checks for invalid shift sizes.  Accommodate this change
by allowing EINVAL in the corresponding futex checks.

* tests/futex.c (CHECK_FUTEX_GENERIC): Reset errno before the syscall.
(main) <wake_ops>: Add err2 field, describe err/err2 fields.
Add EINVAL as a possible errno to the checks that contain invalid
shift values.
Update return value check so it checks that values are strictly
as expected.

Closes: https://github.com/strace/strace/pull/16

tests: cleanup futex test

* tests/futex.c (main) <wake_ops>: Remove unused errstr field
from the structure type definition.

seccomp: decode SECCOMP_GET_ACTION_AVAIL operation

* defs.h (seccomp_ret_action): New xlat prototype.
* seccomp.c (decode_seccomp_set_mode_strict): Remove.
(SYS_FUNC(seccomp)): Decode SECCOMP_GET_ACTION_AVAIL operation.
* NEWS: Mention this.
* tests/seccomp_get_action_avail.c: New file.
* tests/gen_tests.in (seccomp_get_action_avail): New entry.
* tests/pure_executables.list: Add seccomp_get_action_avail.
* tests/.gitignore: Likewise.

Add SECCOMP_RET_KILL_PROCESS decoding support

* bpf_seccomp_filter.c [!SECCOMP_RET_ACTION]: Remove.
[!SECCOMP_RET_ACTION_FULL] (SECCOMP_RET_ACTION_FULL): Define.
(print_seccomp_filter_k): Use SECCOMP_RET_ACTION_FULL
instead of SECCOMP_RET_ACTION.
* xlat/seccomp_ret_action.in: Add SECCOMP_RET_KILL_PROCESS introduced
by linux kernel commit v4.14-rc2~15^2~3.

Rename SECCOMP_RET_KILL to SECCOMP_RET_KILL_THREAD

Follow linux kernel commit v4.14-rc2~15^2~4 and rename SECCOMP_RET_KILL
to SECCOMP_RET_KILL_THREAD.

* xlat/seccomp_ret_action.in (SECCOMP_RET_KILL): Rename
to SECCOMP_RET_KILL_THREAD.
* tests/prctl-seccomp-filter-v.c (main): Update expected output.
* tests/seccomp-filter-v.c (main): Likewise.

Update SECCOMP_* constants

* xlat/seccomp_filter_flags.in: Add SECCOMP_FILTER_FLAG_LOG introduced
by kernel commit v4.14-rc2~15^2~6.
* xlat/seccomp_ops.in: Add SECCOMP_GET_ACTION_AVAIL introduced
by kernel commit v4.14-rc2~15^2~9.
* xlat/seccomp_ret_action.in: Add SECCOMP_RET_LOG introduced
by kernel commit v4.14-rc2~15^2~5.
* NEWS: Mention this.
* tests/seccomp-filter.c (main): Update expected output.
* tests/seccomp-filter-v.c (main): Likewise.

Provide fallback definitions for SECCOMP_RET_* constants

* xlat/seccomp_ret_action.in: Add fallback definitions.

tests: robustify options-syntax.test against inquisitive musl

Workaround musl >= 1.1.17 ability to use AT_EXECFN during
program_invocation_name initialization.

* tests/options-syntax.test: Check for two valid variants
of "zeroargc strace" expected output.

Update MEMBARRIER_CMD_* constants

* xlat/membarrier_cmds.in: Add MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED
introduced by kernel commit v4.14-rc6~26.
* tests/membarrier.c (main): Update expected output.

tests: check decoding of NFNL_SUBSYS_NFT_COMPAT netlink message flags

* tests/nfnetlink_nft_compat.c (test_nlmsg_flags): New function.
(main): Use it.

tests: check decoding of NFNL_SUBSYS_NFTABLES netlink message flags

* tests/nfnetlink_nftables.c (test_nlmsg_flags): New function.
(main): Use it.

tests: check decoding of NFNL_SUBSYS_CTHELPER netlink message flags

* tests/nfnetlink_cthelper.c (test_nlmsg_flags): New function.
(main): Use it.

tests: check decoding of NFNL_SUBSYS_CTNETLINK_TIMEOUT netlink message flags

* tests/nfnetlink_cttimeout.c (test_nlmsg_flags): New function.
(main): Use it.

tests: check decoding of NFNL_SUBSYS_ACCT netlink message flags

* tests/nfnetlink_acct.c (test_nlmsg_flags): New function.
(main): Use it.

tests: check decoding of NFNL_SUBSYS_CTNETLINK_EXP netlink message flags

* tests/nfnetlink_ctnetlink_exp.c (test_nlmsg_flags): New function.
(main): Use it.

tests: check decoding of NFNL_SUBSYS_CTNETLINK netlink message flags

* tests/nfnetlink_ctnetlink.c (test_nlmsg_flags): New function.
(main): Use it.

netlink: decode NETLINK_NETFILTER netlink message flags

* netlink.c (decode_nlmsg_flags_netfilter): New function.
(nlmsg_flags): Add NETLINK_NETFILTER.
* NEWS: Mention this.

netlink: decode netlink message delete flags

* netlink.c: Include "xlat/netlink_delete_flags.h".
(decode_nlmsg_flags_crypto, decode_nlmsg_flags_route,
decode_nlmsg_flags_xfrm): Decode delete flags.
* netlink.h (NLM_F_NONREC): New macro.
* xlat/netlink_delete_flags.in: New file.
* tests/netlink_crypto.c (test_nlmsg_flags): Check this.
* tests/netlink_route.c (test_nlmsg_flags): Likewise.
* tests/netlink_xfrm.c (test_nlmsg_flags): Likewise.

netlink: refactor decode_nlmsg_flags

Refactor decode_nlmsg_flags to make it family-specific, just like
decode_nlmsg_type and decode_payload.

* netlink.c (decode_nlmsg_flags_crypto, decode_nlmsg_flags_route,
decode_nlmsg_flags_sock_diag, decode_nlmsg_flags_xfrm): New functions.
(nlmsg_flags_decoder_t): New typedef.
(nlmsg_flags): New array.
(decode_nlmsg_flags): Use it.

Workaround historic linux/netfilter/xt_osf.h deficiencies

When using linux kernel headers without commit v4.5-rc1~128^2~115^2~22
("netfilter: fix include files for compilation"), both <linux/ip.h>
and <linux/tcp.h> have to be included before <linux/netfilter/xt_osf.h>.

* configure.ac (AC_CHECK_HEADERS): Include <linux/ip.h>
and <linux/tcp.h> when checking for linux/netfilter/xt_osf.h header.
* tests/nfnetlink_osf.c: Include <linux/ip.h> and <linux/tcp.h>
before <linux/netfilter/xt_osf.h>.

tests: check decoding of NFNL_SUBSYS_NFT_COMPAT netlink message types

* configure.ac (AC_CHECK_HEADERS): Add
linux/netfilter/nf_tables_compat.h.
* tests/nfnetlink_nft_compat.c: New file.
* tests/gen_tests.in (nfnetlink_nft_compat): New entry.
* tests/pure_executables.list: Add nfnetlink_nft_compat.
* tests/.gitignore: Likewise.

tests: check decoding of NFNL_SUBSYS_NFTABLES netlink message types

* configure.ac (AC_CHECK_HEADERS): Add linux/netfilter/nf_tables.h.
* tests/nfnetlink_nftables.c: New file.
* tests/gen_tests.in (nfnetlink_nftables): New entry.
* tests/pure_executables.list: Add nfnetlink_nftables.
* tests/.gitignore: Likewise.

tests: check decoding of NFNL_SUBSYS_CTHELPER netlink message types

* configure.ac (AC_CHECK_HEADERS): Add
linux/netfilter/nfnetlink_cthelper.h.
* tests/nfnetlink_cthelper.c: New file.
* tests/gen_tests.in (nfnetlink_cthelper): New entry.
* tests/pure_executables.list: Add nfnetlink_cthelper.
* tests/.gitignore: Likewise.

tests: check decoding of NFNL_SUBSYS_CTNETLINK_TIMEOUT netlink message types

* configure.ac (AC_CHECK_HEADERS): Add
linux/netfilter/nfnetlink_cttimeout.h.
* tests/nfnetlink_cttimeout.c: New file.
* tests/gen_tests.in (nfnetlink_cttimeout): New entry.
* tests/pure_executables.list: Add nfnetlink_cttimeout.
* tests/.gitignore: Likewise.

tests: check decoding of NFNL_SUBSYS_ACCT netlink message types

* configure.ac (AC_CHECK_HEADERS): Add
linux/netfilter/nfnetlink_acct.h.
* tests/nfnetlink_acct.c: New file.
* tests/gen_tests.in (nfnetlink_acct): New entry.
* tests/pure_executables.list: Add nfnetlink_acct.
* tests/.gitignore: Likewise.

tests: check decoding of NFNL_SUBSYS_IPSET netlink message types

* configure.ac (AC_CHECK_HEADERS): Add linux/netfilter/ipset/ip_set.h.
* tests/nfnetlink_ipset.c: New file.
* tests/gen_tests.in (nfnetlink_ipset): New entry.
* tests/pure_executables.list: Add nfnetlink_ipset.
* tests/.gitignore: Likewise.

tests: check decoding of NFNL_SUBSYS_OSF netlink message types

* configure.ac (AC_CHECK_HEADERS): Add linux/netfilter/xt_osf.h.
* tests/nfnetlink_osf.c: New file.
* tests/gen_tests.in (nfnetlink_osf): New entry.
* tests/pure_executables.list: Add nfnetlink_osf.
* tests/.gitignore: Likewise.

tests: check decoding of NFNL_SUBSYS_ULOG netlink message types

* configure.ac (AC_CHECK_HEADERS): Add
linux/netfilter/nfnetlink_log.h.
* tests/nfnetlink_ulog.c: New file.
* tests/gen_tests.in (nfnetlink_ulog): New entry.
* tests/pure_executables.list: Add nfnetlink_ulog.
* tests/.gitignore: Likewise.

tests: check decoding of NFNL_SUBSYS_QUEUE netlink message types

* configure.ac (AC_CHECK_HEADERS): Add
linux/netfilter/nfnetlink_queue.h.
* tests/nfnetlink_queue.c: New file.
* tests/gen_tests.in (nfnetlink_queue): New entry.
* tests/pure_executables.list: Add nfnetlink_queue.
* tests/.gitignore: Likewise.

tests: check decoding of NFNL_SUBSYS_CTNETLINK_EXP netlink message types

* tests/nfnetlink_ctnetlink_exp.c: New file.
* tests/gen_tests.in (nfnetlink_ctnetlink_exp): New entry.
* tests/pure_executables.list: Add nfnetlink_ctnetlink_exp.
* tests/.gitignore: Likewise.

tests: check decoding of NFNL_SUBSYS_CTNETLINK netlink message types

* configure.ac (AC_CHECK_HEADERS): Add
linux/netfilter/nfnetlink_conntrack.h.
* tests/nfnetlink_ctnetlink.c: New file.
* tests/gen_tests.in (nfnetlink_ctnetlink): New entry.
* tests/pure_executables.list: Add nfnetlink_ctnetlink.
* tests/.gitignore: Likewise.

netlink: decode NETLINK_NETFILTER netlink message types

* netlink.c: Include "xlat/nf_acct_msg_types.h",
"xlat/nf_cthelper_msg_types.h", "xlat/nf_ctnetlink_exp_msg_types.h",
"xlat/nf_ctnetlink_msg_types.h", "xlat/nf_cttimeout_msg_types.h",
"xlat/nf_ipset_msg_types.h", "xlat/nf_nft_compat_msg_types.h",
"xlat/nf_nftables_msg_types.h", "xlat/nf_osf_msg_types.h",
"xlat/nf_queue_msg_types.h", and "xlat/nf_ulog_msg_types.h".
(nf_nlmsg_types): New array.
(decode_nlmsg_type_netfilter): Use it.
* NEWS: Mention this.
* xlat/nf_acct_msg_types.in: New file.
* xlat/nf_cthelper_msg_types.in: Likewise.
* xlat/nf_ctnetlink_exp_msg_types.in: Likewise.
* xlat/nf_ctnetlink_msg_types.in: Likewise.
* xlat/nf_cttimeout_msg_types.in: Likewise.
* xlat/nf_ipset_msg_types.in: Likewise.
* xlat/nf_nft_compat_msg_types.in: Likewise.
* xlat/nf_nftables_msg_types.in: Likewise.
* xlat/nf_osf_msg_types.in: Likewise.
* xlat/nf_queue_msg_types.in: Likewise.
* xlat/nf_ulog_msg_types.in: Likewise.
* tests/netlink_netfilter.c (test_nlmsg_type): Update expected output.

ppc64: fix sigreturn parser for ppc personality

* linux/powerpc/arch_sigreturn.c (arch_sigreturn) [POWERPC64]: Rewrite.

ppc64: truncate syscall args for 32-bit personality tracees

* linux/powerpc/get_syscall_args.c (get_syscall_args): Clear upper
32 bits of syscall args for 32-bit personality tracees.
* NEWS: Mention this fix.

ppc64: fix PRI__64 macro definition when compiled with -m32

* kernel_types.h [SIZEOF_LONG != 4]: Check for __powerpc64__ instead
of POWERPC to handle -m32 case properly.

loop: decode LOOP_SET_BLOCK_SIZE

* loop.c (loop_ioctl) <LOOP_SET_BLOCK_SIZE>: Handle LOOP_SET_BLOCK_SIZE.
* tests/ioctl_loop.c (main): Check it.

Update ioctl entries from linux v4.14-rc1

* linux/32/ioctls_inc_align16.h: Update from linux v4.14-rc1
using ioctls_gen.sh.
* linux/32/ioctls_inc_align32.h: Likewise.
* linux/32/ioctls_inc_align64.h: Likewise.
* linux/64/ioctls_inc.h: Likewise.
* linux/x32/ioctls_inc0.h: Likewise.
* xlat/loop_cmds.in: Add LOOP_SET_BLOCK_SIZE introduced
by kernel commit v4.13-rc7-176-g89e4fde.
* NEWS: Mention this.
* tests/ioctl_loop.c (main): Update.

maint: generate ioctl entries without target architecture code execution

ioctls_sym.sh used to generate and invoke target architecture
executables that limited its applicability.
After this change, the generated code is just compiled to the target
architecture object files and all required information is obtained
from the dwarf sections.
This approach allows to generate ioctl entries for any target
architecture supported by compiler.

* maint/ioctls_sym.awk: New file.
* maint/ioctls_sym.sh (LC_ALL): Define to C and export.
(uname_m): Make configurable.
(CFLAGS): Add -gdwarf-2.
(LDFLAGS): Remove.
Do not use print_ioctlent.c.
Change asm-generic/ioctl.h and asm/ioctl.h hook.
Dump and process dwarf sections of generated object files.
* maint/print_ioctlent.c: Remove.

Remove KVM_S390_* ioctls from non-s390 architectures

* maint/ioctls_sym.sh <linux/kvm.h> (s390_list): New variable.
Use it to exclude KVM_S390_* ioctls on non-s390 architectures.
* linux/arm/ioctls_arch0.h: Regenerate.
* linux/i386/ioctls_arch0.h: Likewise.
* linux/powerpc/ioctls_arch0.h: Likewise.
* linux/s390/ioctls_arch0.h: Likewise.
* linux/x86_64/ioctls_arch0.h: Likewise.

Remove some of arch-specific KVM ioctls from non-matching architectures

* maint/ioctls_sym.sh (arm_list, ppc_list, x86_list): Use bracket
expressions to generalize arch-specific regular expressions.
* linux/arm/ioctls_arch0.h: Regenerate.
* linux/i386/ioctls_arch0.h: Likewise.
* linux/powerpc/ioctls_arch0.h: Likewise.
* linux/s390/ioctls_arch0.h: Likewise.
* linux/x86_64/ioctls_arch0.h: Likewise.

dm: add support for DM_DEV_ARM_POLL

Added in Linux commit v4.13-rc1~137^2~14.

* dm.c [!DM_LIST_VERSIONS] (DM_LIST_VERSIONS): Add leading zero.
[!DM_TARGET_MSG] (DM_TARGET_MSG): Likewise.
[!DM_DEV_SET_GEOMETRY_CMD] (DM_DEV_SET_GEOMETRY_CMD): Likewise.
[!DM_DEV_ARM_POLL] (DM_DEV_ARM_POLL): New macro.
(dm_ioctl_has_params, dm_ioctl): Handle DM_DEV_ARM_POLL.
* tests/ioctl_dm.c [!DM_DEV_ARM_POLL] (DM_DEV_ARM_POLL): New macro.
(main) <dummy_check_cmds>: Add DM_DEV_ARM_POLL.

kcmp: add KCMP_EPOLL_TFD support

* configure.ac (AC_CHECK_TYPES): Add check for struct kcmp_epoll_slot.
* kcmp.c (SYS_FUNC(kcmp)) <case KCMP_EPOLL_TFD>: Implement idx1/idx2
argument parsing.
* tests/kcmp.c: Update test.
* xlat/kcmp_types.in (KCMP_EPOLL_TFD): New entry.

tests: add kcmp-y test

It is not very useful as of now, but it will allow tracking changes
in fd output once they are implemented.

* tests/gen_tests.in (kcmp-y): New test.
* tests/kcmp-y.c: New file, wrapper for kcmp.c
* tests/kcmp.c: Add opening of some files for which info may be printed
in the future.
* tests/pure_executables.list: Add kcmp-y.
* tests/.gitignore: Likewise.

kcmp: output fds using a separate function

This is a preparation for the future introduction of cross-NS PID
derivation, which would enable us to print fd information for fds
related to all processes, not just traced ones.

Note the change in output type for idx1/idx2 in KCMP_FILE command from
unsigned to int, it follows printfd output format.

* kcmp.c (printpidfd): New function.
(PRINT_FIELD_PIDFD): New macro.
(SYS_FUNC(kcmp)) <case KCMP_FILE>: Use printpidfd for printing
idx1/idx2, as they are fds, after all.

tests/kcmp: add more checks

Let's check all kcmp commands that they indeed do not print idx1/idx2.
Also, check that upper bits of pid arguments are ignored.

* tests/gen_tests.in (kcmp): Decrease -a argument's value from 27 to 22.
* tests/kcmp.c: Add checks for upper bits of pid1/pid2 and for all
kcmp types not tested before.

tests/kcmp: use <linux/kcmp.h> if it is available

I see it as a good idea to stick to system headers whenever possible
in order to also check for possible discrepancies between strace's
internal definitions and definitions present in the system headers.

* configure.ac (AC_CHECK_HEADERS): Add linux/kcmp.h.
* tests/kcmp.h [HAVE_LINUX_KCMP_H]: Include <linux/kcmp.h>,
do not define KCMP_FILE and KCMP_SYSVSEM.

tests: check decoding of MDBA_ROUTER_PORT netlink attribute

* tests/nlattr_mdba_router_port.c: New file.
* tests/gen_tests.in (nlattr_mdba_router_port): New entry.
* tests/pure_executables.list: Add nlattr_mdba_router_port.
* tests/.gitignore: Likewise.

tests: check decoding of MDBA_MDB_ENTRY_INFO netlink attributes

* tests/nlattr_mdba_mdb_entry.c: New file.
* tests/gen_tests.in (nlattr_mdba_mdb_entry): New entry.
* tests/pure_executables.list: Add nlattr_mdba_mdb_entry.
* tests/.gitignore: Likewise.

tests: extend TEST_NESTED_NLATTR_OBJECT macro

Extend TEST_NESTED_NLATTR_OBJECT macro for multi-nested netlink
attributes, such as

[MDBA_MDB] = {
[MDBA_MDB_ENTRY] = {
[MDBA_MDB_ENTRY_INFO] {
struct br_mdb_entry
[MDBA_MDB_EATTR attributes]
}
}
}

* tests/test_nlattr.h (TEST_NESTED_NLATTR_OBJECT_EX_,
TEST_NESTED_NLATTR_OBJECT_EX): New macros.
(TEST_NESTED_NLATTR_OBJECT): Use TEST_NESTED_NLATTR_OBJECT_EX_.

rtnl_mdb: decode br_port_msg netlink attributes

* configure.ac (AC_CHECK_TYPES): Check for struct br_mdb_entry
in <linux/if_bridge.h>.
(AC_CHECK_MEMBERS): Check for flags and vid fields in struct br_mdb_entry.
* rtnl_mdb.c: Include "xlat/mdb_flags.h", "xlat/mdb_states.h",
"xlat/rtnl_mdba_mdb_attrs.h", "xlat/rtnl_mdba_mdb_eattr_attrs.h",
"xlat/rtnl_mdba_mdb_entry_attrs.h" ,"xlat/rtnl_mdba_router_attrs.h"
and "xlat/rtnl_mdba_router_pattr_attrs.h".
(decode_mdba_mdb_entry_info, decode_mdba_mdb_entry,
decode_mdba_mdb, decode_multicast_router_type,
decode_mdba_router_port, decode_mdba_router): New functions.
(mdba_mdb_eattr_nla_decoders, mdba_mdb_entry_nla_decoders,
mdba_mdb_nla_decoders, mdba_router_pattr_nla_decoders,
mdba_router_nla_decoders, br_port_msg_nla_decoders): New arrays.
(decode_br_port_msg): Use br_port_msg_nla_decoders.
* xlat/mdb_flags.in: New file.
* xlat/mdb_states.in: Likewise.
* xlat/multicast_router_types.in: Likewise.
* xlat/rtnl_mdba_mdb_attrs.in: Likewise.
* xlat/rtnl_mdba_mdb_eattr_attrs.in: Likewise.
* xlat/rtnl_mdba_mdb_entry_attrs.in: Likewise.
* xlat/rtnl_mdba_router_attrs.in: Likewise.
* xlat/rtnl_mdba_router_pattr_attrs.in: Likewise.

netlink: implement decoding of INET_DIAG_CLASS_ID attribute

This is a new netlink attribute introduced by linux kernel commit
v4.14-rc1~130^2~207.

* linux/inet_diag.h (INET_DIAG_CLASS_ID): New enum.
* netlink_inet_diag.c (inet_diag_msg_nla_decoders): Add
INET_DIAG_CLASS_ID.
* xlat/inet_diag_attrs.in: Add INET_DIAG_CLASS_ID.
* xlat/inet_diag_extended_flags.in: Add 1<<(INET_DIAG_CLASS_ID-1).
* tests/nlattr_inet_diag_msg.c (main): Check INET_DIAG_CLASS_ID
decoding.

Update MEMBARRIER_CMD_* constants

* xlat/membarrier_cmds.in: Add MEMBARRIER_CMD_PRIVATE_EXPEDITED
introduced by kernel commit v4.14-rc1~174^2^2^4.
* NEWS: Mention this.
* tests/membarrier.c (main): Update expected output.

Update UFFD_FEATURE_* constants

* xlat/memfd_create_flags.in: Remove UFFD_FEATURE_EVENT_EXIT removed
by kernel commit v4.11-rc2~15^2~18.
Add UFFD_FEATURE_SIGBUS and UFFD_FEATURE_THREAD_ID introduced by kernel
commits v4.14-rc1~126^2~28 and v4.14-rc1~126^2~23, repsectively.
* NEWS: Mention this.

Update MFD_* constants

* xlat/memfd_create_flags.in: Add MFD_HUGETLB introduced
by kernel commit v4.14-rc1~126^2~17.
* NEWS: Mention this.
* tests/memfd_create.c (main): Update expected output.

Update ETH_P_* constants

* xlat/ethernet_protocols.in: Add ETH_P_ERSPAN, ETH_P_NSH, ETH_P_IFE,
and ETH_P_MAP introduced by kernel commits v4.14-rc1~130^2~164,
v4.14-rc1~130^2~89^2~3, v4.14-rc1~130^2~90^2~2, and
v4.14-rc1~130^2~78^2~2, respectively.
* NEWS: Mention this.

Update ARPHRD_* constants

* xlat/arp_hardware_types.in: Add ARPHRD_RAWIP introduced
by kernel commit v4.14-rc1~130^2~78^2~1.
* NEWS: Mention this.