Re: bpftool gen object doesn't handle GCC built BPF ELF files

["Jose E. Marchesi" <jose.marchesi@xxxxxxxxxx>]

> On Sun, Jul 10, 2022 at 3:38 AM Jose E. Marchesi
> <jose.marchesi@xxxxxxxxxx> wrote:
>>
>>
>> > On Sat, Jul 9, 2022 at 4:41 PM Jose E. Marchesi
>> > <jose.marchesi@xxxxxxxxxx> wrote:
>> >>
>> >>
>> >> > On Sat, Jul 9, 2022 at 2:32 PM James Hilliard <james.hilliard1@xxxxxxxxx> wrote:
>> >> >>
>> >> >> On Sat, Jul 9, 2022 at 2:21 PM Jose E. Marchesi
>> >> >> <jose.marchesi@xxxxxxxxxx> wrote:
>> >> >> >
>> >> >> >
>> >> >> > > On Sat, Jul 9, 2022 at 11:24 AM Jose E. Marchesi
>> >> >> > > <jose.marchesi@xxxxxxxxxx> wrote:
>> >> >> > >>
>> >> >> > >>
>> >> >> > >> > On Fri, Jul 8, 2022 at 12:33 PM Jose E. Marchesi
>> >> >> > >> > <jose.marchesi@xxxxxxxxxx> wrote:
>> >> >> > >> >>
>> >> >> > >> >>
>> >> >> > >> >> >> On Wed, Jul 6, 2022 at 10:13 AM James Hilliard
>> >> >> > >> >> >> <james.hilliard1@xxxxxxxxx> wrote:
>> >> >> > >> >> >>>
>> >> >> > >> >> >>> Note I'm testing with the following patches:
>> >> >> > >> >> >>> https://lore.kernel.org/bpf/20220706111839.1247911-1-james.hilliard1@xxxxxxxxx/
>> >> >> > >> >> >>> https://lore.kernel.org/bpf/20220706140623.2917858-1-james.hilliard1@xxxxxxxxx/
>> >> >> > >> >> >>>
>> >> >> > >> >> >>> It would appear there's some compatibility issues with bpftool gen and
>> >> >> > >> >> >>> GCC, not sure what side though is wrong here:
>> >> >> > >> >> >>> /home/buildroot/buildroot/output/per-package/systemd/host/sbin/bpftool
>> >> >> > >> >> >>> gen object src/core/bpf/restrict_ifaces/restrict-ifaces.bpf.o
>> >> >> > >> >> >>> src/core/bpf/restrict_ifaces/restrict-ifaces.bpf.unstripped.o
>> >> >> > >> >> >>> libbpf: failed to find BTF info for global/extern symbol 'sd_restrictif_i'
>> >> >> > >> >> >>> Error: failed to link
>> >> >> > >> >> >>> 'src/core/bpf/restrict_ifaces/restrict-ifaces.bpf.unstripped.o':
>> >> >> > >> >> >>> Unknown error -2 (-2)
>> >> >> > >> >> >>>
>> >> >> > >> >> >>> Relevant difference seems to be this:
>> >> >> > >> >> >>> GCC:
>> >> >> > >> >> >>> [55] FUNC 'sd_restrictif_i' type_id=47 linkage=static
>> >> >> > >> >> >>> Clang:
>> >> >> > >> >> >>> [27] FUNC 'sd_restrictif_i' type_id=26 linkage=global
>> >> >> > >> >> >
>> >> >> > >> >> > For functions GCC generates a BTF_KIND_FUNC entry, which has no linkage
>> >> >> > >> >> > information, or so we thought: I just looked at bpftool/btf.c and I
>> >> >> > >> >> > found the linkage info for function types is expected to be encoded in
>> >> >> > >> >> > the vlen field of BTF_KIND_FUNC entries (why not adding a btf_func
>> >> >> > >> >> > instead???) which is surprising to say the least.
>> >> >> > >> >> >
>> >> >> > >> >> > We are changing GCC to encode the linkage info in vlen for these types.
>> >> >> > >> >> > Thanks for reporting this.
>> >> >> > >> >>
>> >> >> > >> >> Patch sent to GCC upstream:
>> >> >> > >> >> https://gcc.gnu.org/pipermail/gcc-patches/2022-July/598090.html
>> >> >> > >> >
>> >> >> > >> > I applied that patch on top of GCC 12.1.0 and it appears to fix the
>> >> >> > >> > bpftool gen object bug.
>> >> >> > >> >
>> >> >> > >> > I am however now hitting a different error during skeleton generation:
>> >> >> > >> > /home/buildroot/buildroot/output/per-package/systemd/host/sbin/bpftool
>> >> >> > >> > gen skeleton src/core/bpf/restrict_ifaces/restrict-ifaces.bpf.o
>> >> >> > >> > libbpf: elf: skipping unrecognized data section(9) .comment
>> >> >> > >> > libbpf: failed to alloc map 'restrict.bss' content buffer: -22
>> >> >> > >> > Error: failed to open BPF object file: Invalid argument
>> >> >> > >>
>> >> >> > >> What is the size of the .bss section in the object file?  Try with:
>> >> >> > >>
>> >> >> > >> $ size restrict-ifaces.bpf.o
>> >> >> > >
>> >> >> > > $ size
>> >> > output/build/systemd-custom/build/src/core/bpf/restrict_ifaces/restrict-ifaces.bpf.o
>> >> >> > >    text       data        bss        dec        hex    filename
>> >> >> > >     386         25          0        411        19b
>> >> >> > > output/build/systemd-custom/build/src/core/bpf/restrict_ifaces/restrict-ifaces.bpf.o
>> >> >> >
>> >> >> > Right, so the .bss section is empty.  I see a `const volatile unsigned
>> >> >> > char is_allow_list = 0;' in restrict-ifaces.bpf.c, but that goes to
>> >> >> > .data and not to .bss, as expected.
>> >> >> >
>> >> >> > If you build restrict-ifaces.bpf.o with LLVM, is the bss still empty?  I
>> >> >> > don't think the code in libbpf.c even checks for this eventuality...
>> >> >>
>> >> >> LLVM version(which skeleton generation works with):
>> >> >> $ size restrict-ifaces.bpf.o
>> >> >>    text       data        bss        dec        hex    filename
>> >> >>     323         24          0        347        15b    restrict-ifaces.bpf.o
>> >> >>
>> >> >> $ /home/buildroot/buildroot/output/per-package/systemd/host/sbin/bpftool
>> >> >> btf dump file restrict-ifaces.bpf.o format raw
>> >> >> [1] PTR '(anon)' type_id=3
>> >> >> [2] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED
>> >> >> [3] ARRAY '(anon)' type_id=2 index_type_id=4 nr_elems=1
>> >> >> [4] INT '__ARRAY_SIZE_TYPE__' size=4 bits_offset=0 nr_bits=32 encoding=(none)
>> >> >> [5] PTR '(anon)' type_id=6
>> >> >> [6] TYPEDEF '__u32' type_id=7
>> >> >> [7] INT 'unsigned int' size=4 bits_offset=0 nr_bits=32 encoding=(none)
>> >> >> [8] PTR '(anon)' type_id=9
>> >> >> [9] TYPEDEF '__u8' type_id=10
>> >> >> [10] INT 'unsigned char' size=1 bits_offset=0 nr_bits=8 encoding=(none)
>> >> >> [11] STRUCT '(anon)' size=24 vlen=3
>> >> >>     'type' type_id=1 bits_offset=0
>> >> >>     'key' type_id=5 bits_offset=64
>> >> >>     'value' type_id=8 bits_offset=128
>> >> >> [12] VAR 'sd_restrictif' type_id=11, linkage=global
>> >> >> [13] PTR '(anon)' type_id=14
>> >> >> [14] CONST '(anon)' type_id=15
>> >> >> [15] STRUCT '__sk_buff' size=192 vlen=33
>> >> >>     'len' type_id=6 bits_offset=0
>> >> >>     'pkt_type' type_id=6 bits_offset=32
>> >> >>     'mark' type_id=6 bits_offset=64
>> >> >>     'queue_mapping' type_id=6 bits_offset=96
>> >> >>     'protocol' type_id=6 bits_offset=128
>> >> >>     'vlan_present' type_id=6 bits_offset=160
>> >> >>     'vlan_tci' type_id=6 bits_offset=192
>> >> >>     'vlan_proto' type_id=6 bits_offset=224
>> >> >>     'priority' type_id=6 bits_offset=256
>> >> >>     'ingress_ifindex' type_id=6 bits_offset=288
>> >> >>     'ifindex' type_id=6 bits_offset=320
>> >> >>     'tc_index' type_id=6 bits_offset=352
>> >> >>     'cb' type_id=16 bits_offset=384
>> >> >>     'hash' type_id=6 bits_offset=544
>> >> >>     'tc_classid' type_id=6 bits_offset=576
>> >> >>     'data' type_id=6 bits_offset=608
>> >> >>     'data_end' type_id=6 bits_offset=640
>> >> >>     'napi_id' type_id=6 bits_offset=672
>> >> >>     'family' type_id=6 bits_offset=704
>> >> >>     'remote_ip4' type_id=6 bits_offset=736
>> >> >>     'local_ip4' type_id=6 bits_offset=768
>> >> >>     'remote_ip6' type_id=17 bits_offset=800
>> >> >>     'local_ip6' type_id=17 bits_offset=928
>> >> >>     'remote_port' type_id=6 bits_offset=1056
>> >> >>     'local_port' type_id=6 bits_offset=1088
>> >> >>     'data_meta' type_id=6 bits_offset=1120
>> >> >>     '(anon)' type_id=18 bits_offset=1152
>> >> >>     'tstamp' type_id=20 bits_offset=1216
>> >> >>     'wire_len' type_id=6 bits_offset=1280
>> >> >>     'gso_segs' type_id=6 bits_offset=1312
>> >> >>     '(anon)' type_id=22 bits_offset=1344
>> >> >>     'gso_size' type_id=6 bits_offset=1408
>> >> >>     'hwtstamp' type_id=20 bits_offset=1472
>> >> >> [16] ARRAY '(anon)' type_id=6 index_type_id=4 nr_elems=5
>> >> >> [17] ARRAY '(anon)' type_id=6 index_type_id=4 nr_elems=4
>> >> >> [18] UNION '(anon)' size=8 vlen=1
>> >> >>     'flow_keys' type_id=19 bits_offset=0
>> >> >> [19] PTR '(anon)' type_id=34
>> >> >> [20] TYPEDEF '__u64' type_id=21
>> >> >> [21] INT 'unsigned long long' size=8 bits_offset=0 nr_bits=64 encoding=(none)
>> >> >> [22] UNION '(anon)' size=8 vlen=1
>> >> >>     'sk' type_id=23 bits_offset=0
>> >> >> [23] PTR '(anon)' type_id=35
>> >> >> [24] FUNC_PROTO '(anon)' ret_type_id=2 vlen=1
>> >> >>     'sk' type_id=13
>> >> >> [25] FUNC 'sd_restrictif_e' type_id=24 linkage=global
>> >> >> [26] FUNC 'sd_restrictif_i' type_id=24 linkage=global
>> >> >> [27] CONST '(anon)' type_id=28
>> >> >> [28] VOLATILE '(anon)' type_id=9
>> >> >> [29] VAR 'is_allow_list' type_id=27, linkage=global
>> >> >> [30] CONST '(anon)' type_id=31
>> >> >> [31] INT 'char' size=1 bits_offset=0 nr_bits=8 encoding=SIGNED
>> >> >> [32] ARRAY '(anon)' type_id=30 index_type_id=4 nr_elems=18
>> >> >> [33] VAR '_license' type_id=32, linkage=static
>> >> >> [34] FWD 'bpf_flow_keys' fwd_kind=struct
>> >> >> [35] FWD 'bpf_sock' fwd_kind=struct
>> >> >> [36] DATASEC '.rodata' size=1 vlen=1
>> >> >>     type_id=29 offset=0 size=1 (VAR 'is_allow_list')
>> >> >> [37] DATASEC 'license' size=18 vlen=1
>> >> >>     type_id=33 offset=0 size=18 (VAR '_license')
>> >> >> [38] DATASEC '.maps' size=24 vlen=1
>> >> >>     type_id=12 offset=0 size=24 (VAR 'sd_restrictif')
>> >> >>
>> >> >
>> >> > Skeleton generation debug output for GCC(failing) and LLVM(working)
>> >> > which may be helpful:
>> >>
>> >> Indeed it was helpful :)
>> >>
>> >> The GNU assembler generates an empty .bss section.  This is a well
>> >> established behavior in GAS that happens in all supported targets.
>> >>
>> >> The LLVM assembler doesn't generate an empty .bss section.
>> >>
>> >> bpftool chokes on the empty .bss section.
>> >>
>> >> In this case I would suggest to fix bpf_object__init_global_data_maps in
>> >> order to skip empty sections.
>> >>
>> >> Something like this:
>> >
>> > Hmm, that seems to segfault:
>>
>> Yes, I see in bpf_object__elf_collect that sec_desc->data is not
>> initialized when a section is not recognized.  In this case, this
>> happens with .comment.
>>
>> All right then:
>>
>> diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
>> index e89cc9c885b3..887b78780099 100644
>> --- a/tools/lib/bpf/libbpf.c
>> +++ b/tools/lib/bpf/libbpf.c
>> @@ -1591,6 +1591,10 @@ static int bpf_object__init_global_data_maps(struct bpf_object *obj)
>>         for (sec_idx = 1; sec_idx < obj->efile.sec_cnt; sec_idx++) {
>>                 sec_desc = &obj->efile.secs[sec_idx];
>>
>> +                /* Skip recognized sections with size 0.  */
>> +                if (sec_desc->data && sec_desc->data->d_size == 0)
>> +                  continue;
>> +
>>                 switch (sec_desc->sec_type) {
>>                 case SEC_DATA:
>>                         sec_name = elf_sec_name(obj, elf_sec_by_idx(obj, sec_idx));
>
> Ok, skeleton is now getting generated successfully, however it differs from the
> clang version so there's a build error when we include/use the header:
> ../src/core/restrict-ifaces.c: In function ‘prepare_restrict_ifaces_bpf’:
> ../src/core/restrict-ifaces.c:45:14: error: ‘struct
> restrict_ifaces_bpf’ has no member named ‘rodata’; did you mean
> ‘data’?
>    45 |         obj->rodata->is_allow_list = is_allow_list;
>       |              ^~~~~~
>       |              data
>
> The issue appears to be that clang generates "rodata" members in
> restrict_ifaces_bpf while with gcc we get "data" members instead.

This is because the BPF GCC port is putting the

  const volatile unsigned char is_allow_list = 0;

in a .data section instead of .rodata, due to the `volatile'.  The
x86_64 GCC seems to use .rodata.

Looking at why the PBF port does this...


> Differences below:
>
> GCC:
> $ /home/buildroot/buildroot/output/per-package/systemd/host/sbin/bpftool
> --debug gen skeleton
> output/build/systemd-custom/build/src/core/bpf/restrict_ifaces/restrict-ifaces.bpf.o
> libbpf: loading object 'restrict_ifaces_bpf' from buffer
> libbpf: elf: section(2) .symtab, size 336, link 1, flags 0, type=2
> libbpf: elf: section(3) .data, size 1, link 0, flags 3, type=1
> libbpf: elf: section(4) .bss, size 0, link 0, flags 3, type=8
> libbpf: elf: section(5) cgroup_skb/egress, size 184, link 0, flags 6, type=1
> libbpf: sec 'cgroup_skb/egress': found program 'sd_restrictif_e' at
> insn offset 0 (0 bytes), code size 23 insns (184 bytes)
> libbpf: elf: section(6) cgroup_skb/ingress, size 184, link 0, flags 6, type=1
> libbpf: sec 'cgroup_skb/ingress': found program 'sd_restrictif_i' at
> insn offset 0 (0 bytes), code size 23 insns (184 bytes)
> libbpf: elf: section(7) license, size 18, link 0, flags 2, type=1
> libbpf: license of restrict_ifaces_bpf is LGPL-2.1-or-later
> libbpf: elf: section(8) .maps, size 24, link 0, flags 3, type=1
> libbpf: elf: section(9) .comment, size 49, link 0, flags 30, type=1
> libbpf: elf: skipping unrecognized data section(9) .comment
> libbpf: elf: section(10) .relcgroup_skb/egress, size 32, link 2, flags
> 40, type=9
> libbpf: elf: section(11) .relcgroup_skb/ingress, size 32, link 2,
> flags 40, type=9
> libbpf: elf: section(12) .BTF, size 3606, link 0, flags 0, type=1
> libbpf: looking for externs among 14 symbols...
> libbpf: collected 0 externs total
> libbpf: map 'sd_restrictif': at sec_idx 8, offset 0.
> libbpf: map 'sd_restrictif': found type = 1.
> libbpf: map 'sd_restrictif': found key [12], sz = 4.
> libbpf: map 'sd_restrictif': found value [3], sz = 1.
> libbpf: map 'restrict.data' (global data): at sec_idx 3, offset 0, flags 400.
> libbpf: map 1 is "restrict.data"
> libbpf: sec '.relcgroup_skb/egress': collecting relocation for
> section(5) 'cgroup_skb/egress'
> libbpf: sec '.relcgroup_skb/egress': relo #0: insn #4 against 'sd_restrictif'
> libbpf: prog 'sd_restrictif_e': found map 0 (sd_restrictif, sec 8, off
> 0) for insn #4
> libbpf: sec '.relcgroup_skb/egress': relo #1: insn #7 against 'is_allow_list'
> libbpf: prog 'sd_restrictif_e': found data map 1 (restrict.data, sec
> 3, off 0) for insn 7
> libbpf: sec '.relcgroup_skb/ingress': collecting relocation for
> section(6) 'cgroup_skb/ingress'
> libbpf: sec '.relcgroup_skb/ingress': relo #0: insn #4 against 'sd_restrictif'
> libbpf: prog 'sd_restrictif_i': found map 0 (sd_restrictif, sec 8, off
> 0) for insn #4
> libbpf: sec '.relcgroup_skb/ingress': relo #1: insn #7 against 'is_allow_list'
> libbpf: prog 'sd_restrictif_i': found data map 1 (restrict.data, sec
> 3, off 0) for insn 7
> /* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
>
> /* THIS FILE IS AUTOGENERATED BY BPFTOOL! */
> #ifndef __RESTRICT_IFACES_BPF_SKEL_H__
> #define __RESTRICT_IFACES_BPF_SKEL_H__
>
> #include <errno.h>
> #include <stdlib.h>
> #include <bpf/libbpf.h>
>
> struct restrict_ifaces_bpf {
>     struct bpf_object_skeleton *skeleton;
>     struct bpf_object *obj;
>     struct {
>         struct bpf_map *sd_restrictif;
>         struct bpf_map *data;
>     } maps;
>     struct {
>         struct bpf_program *sd_restrictif_e;
>         struct bpf_program *sd_restrictif_i;
>     } progs;
>     struct {
>         struct bpf_link *sd_restrictif_e;
>         struct bpf_link *sd_restrictif_i;
>     } links;
>     struct restrict_ifaces_bpf__data {
>         __u8 is_allow_list;
>     } *data;
>
> #ifdef __cplusplus
>     static inline struct restrict_ifaces_bpf *open(const struct
> bpf_object_open_opts *opts = nullptr);
>     static inline struct restrict_ifaces_bpf *open_and_load();
>     static inline int load(struct restrict_ifaces_bpf *skel);
>     static inline int attach(struct restrict_ifaces_bpf *skel);
>     static inline void detach(struct restrict_ifaces_bpf *skel);
>     static inline void destroy(struct restrict_ifaces_bpf *skel);
>     static inline const void *elf_bytes(size_t *sz);
> #endif /* __cplusplus */
> };
>
> static void
> restrict_ifaces_bpf__destroy(struct restrict_ifaces_bpf *obj)
> {
>     if (!obj)
>         return;
>     if (obj->skeleton)
>         bpf_object__destroy_skeleton(obj->skeleton);
>     free(obj);
> }
>
> static inline int
> restrict_ifaces_bpf__create_skeleton(struct restrict_ifaces_bpf *obj);
>
> static inline struct restrict_ifaces_bpf *
> restrict_ifaces_bpf__open_opts(const struct bpf_object_open_opts *opts)
> {
>     struct restrict_ifaces_bpf *obj;
>     int err;
>
>     obj = (struct restrict_ifaces_bpf *)calloc(1, sizeof(*obj));
>     if (!obj) {
>         errno = ENOMEM;
>         return NULL;
>     }
>
>     err = restrict_ifaces_bpf__create_skeleton(obj);
>     if (err)
>         goto err_out;
>
>     err = bpf_object__open_skeleton(obj->skeleton, opts);
>     if (err)
>         goto err_out;
>
>     return obj;
> err_out:
>     restrict_ifaces_bpf__destroy(obj);
>     errno = -err;
>     return NULL;
> }
>
> static inline struct restrict_ifaces_bpf *
> restrict_ifaces_bpf__open(void)
> {
>     return restrict_ifaces_bpf__open_opts(NULL);
> }
>
> static inline int
> restrict_ifaces_bpf__load(struct restrict_ifaces_bpf *obj)
> {
>     return bpf_object__load_skeleton(obj->skeleton);
> }
>
> static inline struct restrict_ifaces_bpf *
> restrict_ifaces_bpf__open_and_load(void)
> {
>     struct restrict_ifaces_bpf *obj;
>     int err;
>
>     obj = restrict_ifaces_bpf__open();
>     if (!obj)
>         return NULL;
>     err = restrict_ifaces_bpf__load(obj);
>     if (err) {
>         restrict_ifaces_bpf__destroy(obj);
>         errno = -err;
>         return NULL;
>     }
>     return obj;
> }
>
> static inline int
> restrict_ifaces_bpf__attach(struct restrict_ifaces_bpf *obj)
> {
>     return bpf_object__attach_skeleton(obj->skeleton);
> }
>
> static inline void
> restrict_ifaces_bpf__detach(struct restrict_ifaces_bpf *obj)
> {
>     return bpf_object__detach_skeleton(obj->skeleton);
> }
>
> static inline const void *restrict_ifaces_bpf__elf_bytes(size_t *sz);
>
> static inline int
> restrict_ifaces_bpf__create_skeleton(struct restrict_ifaces_bpf *obj)
> {
>     struct bpf_object_skeleton *s;
>     int err;
>
>     s = (struct bpf_object_skeleton *)calloc(1, sizeof(*s));
>     if (!s)    {
>         err = -ENOMEM;
>         goto err;
>     }
>
>     s->sz = sizeof(*s);
>     s->name = "restrict_ifaces_bpf";
>     s->obj = &obj->obj;
>
>     /* maps */
>     s->map_cnt = 2;
>     s->map_skel_sz = sizeof(*s->maps);
>     s->maps = (struct bpf_map_skeleton *)calloc(s->map_cnt, s->map_skel_sz);
>     if (!s->maps) {
>         err = -ENOMEM;
>         goto err;
>     }
>
>     s->maps[0].name = "sd_restrictif";
>     s->maps[0].map = &obj->maps.sd_restrictif;
>
>     s->maps[1].name = "restrict.data";
>     s->maps[1].map = &obj->maps.data;
>     s->maps[1].mmaped = (void **)&obj->data;
>
>     /* programs */
>     s->prog_cnt = 2;
>     s->prog_skel_sz = sizeof(*s->progs);
>     s->progs = (struct bpf_prog_skeleton *)calloc(s->prog_cnt, s->prog_skel_sz);
>     if (!s->progs) {
>         err = -ENOMEM;
>         goto err;
>     }
>
>     s->progs[0].name = "sd_restrictif_e";
>     s->progs[0].prog = &obj->progs.sd_restrictif_e;
>     s->progs[0].link = &obj->links.sd_restrictif_e;
>
>     s->progs[1].name = "sd_restrictif_i";
>     s->progs[1].prog = &obj->progs.sd_restrictif_i;
>     s->progs[1].link = &obj->links.sd_restrictif_i;
>
>     s->data = (void *)restrict_ifaces_bpf__elf_bytes(&s->data_sz);
>
>     obj->skeleton = s;
>     return 0;
> err:
>     bpf_object__destroy_skeleton(s);
>     return err;
> }
>
> static inline const void *restrict_ifaces_bpf__elf_bytes(size_t *sz)
> {
>     *sz = 5616;
>     return (const void *)"\
> \x7f\x45\x4c\x46\x02\x01\x01\0\0\0\0\0\0\0\0\0\x01\0\xf7\0\x01\0\0\0\0\0\0\0\0\
> \0\0\0\0\0\0\0\0\0\0\0\xb0\x12\0\0\0\0\0\0\0\0\0\0\x40\0\0\0\0\0\x40\0\x0d\0\
> \x01\0\0\x2e\x73\x74\x72\x74\x61\x62\0\x2e\x73\x79\x6d\x74\x61\x62\0\x2e\x64\
> \x61\x74\x61\0\x2e\x62\x73\x73\0\x63\x67\x72\x6f\x75\x70\x5f\x73\x6b\x62\x2f\
> \x65\x67\x72\x65\x73\x73\0\x63\x67\x72\x6f\x75\x70\x5f\x73\x6b\x62\x2f\x69\x6e\
> \x67\x72\x65\x73\x73\0\x6c\x69\x63\x65\x6e\x73\x65\0\x2e\x6d\x61\x70\x73\0\x2e\
> \x63\x6f\x6d\x6d\x65\x6e\x74\0\x72\x65\x73\x74\x72\x69\x63\x74\x2d\x69\x66\x61\
> \x63\x65\x73\x2e\x62\x70\x66\x2e\x63\0\x5f\x6c\x69\x63\x65\x6e\x73\x65\0\x73\
> \x64\x5f\x72\x65\x73\x74\x72\x69\x63\x74\x69\x66\x5f\x65\0\x73\x64\x5f\x72\x65\
> \x73\x74\x72\x69\x63\x74\x69\x66\0\x69\x73\x5f\x61\x6c\x6c\x6f\x77\x5f\x6c\x69\
> \x73\x74\0\x73\x64\x5f\x72\x65\x73\x74\x72\x69\x63\x74\x69\x66\x5f\x69\0\x2e\
> \x72\x65\x6c\x63\x67\x72\x6f\x75\x70\x5f\x73\x6b\x62\x2f\x65\x67\x72\x65\x73\
> \x73\0\x2e\x72\x65\x6c\x63\x67\x72\x6f\x75\x70\x5f\x73\x6b\x62\x2f\x69\x6e\x67\
> \x72\x65\x73\x73\0\x2e\x42\x54\x46\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
> \0\0\0\0\0\0\x58\0\0\0\x04\0\xf1\xff\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
> \x03\0\x03\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x03\0\x04\0\0\0\0\0\0\0\0\
> \0\0\0\0\0\0\0\0\0\0\0\0\0\x03\0\x05\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
> \x03\0\x06\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x03\0\x07\0\0\0\0\0\0\0\0\
> \0\0\0\0\0\0\0\0\0\x6e\0\0\0\x01\0\x07\0\0\0\0\0\0\0\0\0\x12\0\0\0\0\0\0\0\0\0\
> \0\0\x03\0\x08\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x03\0\x09\0\0\0\0\0\0\
> \0\0\0\0\0\0\0\0\0\0\0\x77\0\0\0\x12\0\x05\0\0\0\0\0\0\0\0\0\xb8\0\0\0\0\0\0\0\
> \x87\0\0\0\x11\0\x08\0\0\0\0\0\0\0\0\0\x18\0\0\0\0\0\0\0\x95\0\0\0\x11\0\x03\0\
> \0\0\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\xa3\0\0\0\x12\0\x06\0\0\0\0\0\0\0\0\0\xb8\0\
> \0\0\0\0\0\0\0\0\0\0\0\0\0\0\x61\x10\x28\0\0\0\0\0\x63\x0a\xfc\xff\0\0\0\0\xbf\
> \xa2\0\0\0\0\0\0\x07\x02\0\0\xfc\xff\xff\xff\x18\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\
> \0\x85\0\0\0\x01\0\0\0\x18\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x71\x13\0\0\0\0\0\0\
> \x57\x03\0\0\xff\0\0\0\x15\x03\x05\0\0\0\0\0\xbf\x02\0\0\0\0\0\0\x87\x02\0\0\0\
> \0\0\0\x4f\x20\0\0\0\0\0\0\x77\0\0\0\x3f\0\0\0\x95\0\0\0\0\0\0\0\xb7\x01\0\0\
> \x01\0\0\0\x15\0\x01\0\0\0\0\0\xbf\x31\0\0\0\0\0\0\xbf\x10\0\0\0\0\0\0\x57\0\0\
> \0\x01\0\0\0\x95\0\0\0\0\0\0\0\x61\x10\x28\0\0\0\0\0\x63\x0a\xfc\xff\0\0\0\0\
> \xbf\xa2\0\0\0\0\0\0\x07\x02\0\0\xfc\xff\xff\xff\x18\x01\0\0\0\0\0\0\0\0\0\0\0\
> \0\0\0\x85\0\0\0\x01\0\0\0\x18\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x71\x13\0\0\0\0\
> \0\0\x57\x03\0\0\xff\0\0\0\x15\x03\x05\0\0\0\0\0\xbf\x02\0\0\0\0\0\0\x87\x02\0\
> \0\0\0\0\0\x4f\x20\0\0\0\0\0\0\x77\0\0\0\x3f\0\0\0\x95\0\0\0\0\0\0\0\xb7\x01\0\
> \0\x01\0\0\0\x15\0\x01\0\0\0\0\0\xbf\x31\0\0\0\0\0\0\xbf\x10\0\0\0\0\0\0\x57\0\
> \0\0\x01\0\0\0\x95\0\0\0\0\0\0\0\x4c\x47\x50\x4c\x2d\x32\x2e\x31\x2d\x6f\x72\
> \x2d\x6c\x61\x74\x65\x72\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
> \0\0\0\0\0\x47\x43\x43\x3a\x20\x28\x42\x75\x69\x6c\x64\x72\x6f\x6f\x74\x20\x32\
> \x30\x32\x32\x2e\x30\x35\x2d\x31\x33\x32\x2d\x67\x35\x32\x38\x62\x35\x61\x36\
> \x35\x66\x36\x29\x20\x31\x32\x2e\x31\x2e\x30\0\0\0\0\0\0\0\0\x20\0\0\0\0\0\0\0\
> \x01\0\0\0\x0b\0\0\0\x38\0\0\0\0\0\0\0\x01\0\0\0\x0c\0\0\0\x20\0\0\0\0\0\0\0\
> \x01\0\0\0\x0b\0\0\0\x38\0\0\0\0\0\0\0\x01\0\0\0\x0c\0\0\0\x9f\xeb\x01\0\x18\0\
> \0\0\0\0\0\0\x9c\x07\0\0\x9c\x07\0\0\x62\x06\0\0\x01\0\0\0\0\0\0\x01\x01\0\0\0\
> \x08\0\0\x03\x0d\0\0\0\0\0\0\x01\x01\0\0\0\x08\0\0\x02\x1b\0\0\0\0\0\0\x08\x02\
> \0\0\0\0\0\0\0\0\0\0\x0a\x03\0\0\0\0\0\0\0\0\0\0\x09\x04\0\0\0\x20\0\0\0\0\0\0\
> \x01\x02\0\0\0\x10\0\0\x01\x2a\0\0\0\0\0\0\x01\x02\0\0\0\x10\0\0\0\x3d\0\0\0\0\
> \0\0\x08\x07\0\0\0\x43\0\0\0\0\0\0\x01\x04\0\0\0\x20\0\0\x01\x47\0\0\0\0\0\0\
> \x08\x09\0\0\0\x4d\0\0\0\0\0\0\x01\x04\0\0\0\x20\0\0\0\x5a\0\0\0\0\0\0\x08\x0b\
> \0\0\0\x60\0\0\0\0\0\0\x01\x08\0\0\0\x40\0\0\x01\x6e\0\0\0\0\0\0\x01\x08\0\0\0\
> \x40\0\0\0\x85\0\0\0\0\0\0\x08\x0e\0\0\0\x8b\0\0\0\0\0\0\x01\x08\0\0\0\x40\0\0\
> \0\x9d\0\0\0\0\0\0\x01\x08\0\0\0\x40\0\0\x01\xa6\0\0\0\0\0\0\x01\x01\0\0\0\x08\
> \0\0\x03\0\0\0\0\0\0\0\x0a\x12\0\0\0\xab\0\0\0\0\0\0\x08\x08\0\0\0\xb2\0\0\0\0\
> \0\0\x08\x0c\0\0\0\xb9\0\0\0\x1f\0\0\x06\x04\0\0\0\xc6\0\0\0\0\0\0\0\xda\0\0\0\
> \x01\0\0\0\xec\0\0\0\x02\0\0\0\xff\0\0\0\x03\0\0\0\x17\x01\0\0\x04\0\0\0\x35\
> \x01\0\0\x05\0\0\0\x4e\x01\0\0\x06\0\0\0\x68\x01\0\0\x07\0\0\0\x81\x01\0\0\x08\
> \0\0\0\x9b\x01\0\0\x09\0\0\0\xb1\x01\0\0\x0a\0\0\0\xce\x01\0\0\x0b\0\0\0\xe4\
> \x01\0\0\x0c\0\0\0\xff\x01\0\0\x0d\0\0\0\x19\x02\0\0\x0e\0\0\0\x2d\x02\0\0\x0f\
> \0\0\0\x42\x02\0\0\x10\0\0\0\x56\x02\0\0\x11\0\0\0\x6a\x02\0\0\x12\0\0\0\x80\
> \x02\0\0\x13\0\0\0\x9c\x02\0\0\x14\0\0\0\xbd\x02\0\0\x15\0\0\0\xe0\x02\0\0\x16\
> \0\0\0\xf3\x02\0\0\x17\0\0\0\x06\x03\0\0\x18\0\0\0\x1e\x03\0\0\x19\0\0\0\x37\
> \x03\0\0\x1a\0\0\0\x4f\x03\0\0\x1b\0\0\0\x64\x03\0\0\x1c\0\0\0\x7f\x03\0\0\x1d\
> \0\0\0\x99\x03\0\0\x1e\0\0\0\0\0\0\0\x01\0\0\x05\x08\0\0\0\xb3\x03\0\0\x1d\0\0\
> \0\0\0\0\0\xbd\x03\0\0\x0d\0\0\x04\x38\0\0\0\xcb\x03\0\0\x08\0\0\0\0\0\0\0\xd1\
> \x03\0\0\x08\0\0\0\x10\0\0\0\xd7\x03\0\0\x08\0\0\0\x20\0\0\0\xe2\x03\0\0\x03\0\
> \0\0\x30\0\0\0\xea\x03\0\0\x03\0\0\0\x38\0\0\0\xf8\x03\0\0\x03\0\0\0\x40\0\0\0\
> \x01\x04\0\0\x03\0\0\0\x48\0\0\0\x0a\x04\0\0\x14\0\0\0\x50\0\0\0\x12\x04\0\0\
> \x14\0\0\0\x60\0\0\0\x18\x04\0\0\x14\0\0\0\x70\0\0\0\0\0\0\0\x19\0\0\0\x80\0\0\
> \0\x1e\x04\0\0\x0c\0\0\0\x80\x01\0\0\x24\x04\0\0\x15\0\0\0\xa0\x01\0\0\0\0\0\0\
> \x02\0\0\x05\x20\0\0\0\0\0\0\0\x1a\0\0\0\0\0\0\0\0\0\0\0\x1b\0\0\0\0\0\0\0\0\0\
> \0\0\x02\0\0\x04\x08\0\0\0\x2f\x04\0\0\x15\0\0\0\0\0\0\0\x38\x04\0\0\x15\0\0\0\
> \x20\0\0\0\0\0\0\0\x02\0\0\x04\x20\0\0\0\x41\x04\0\0\x1c\0\0\0\0\0\0\0\x4a\x04\
> \0\0\x1c\0\0\0\x80\0\0\0\0\0\0\0\0\0\0\x03\0\0\0\0\x0c\0\0\0\x10\0\0\0\x04\0\0\
> \0\0\0\0\0\0\0\0\x02\x18\0\0\0\0\0\0\0\x01\0\0\x05\x08\0\0\0\x53\x04\0\0\x20\0\
> \0\0\0\0\0\0\x56\x04\0\0\x0e\0\0\x04\x50\0\0\0\x5f\x04\0\0\x0c\0\0\0\0\0\0\0\
> \x6c\x04\0\0\x0c\0\0\0\x20\0\0\0\x73\x04\0\0\x0c\0\0\0\x40\0\0\0\x78\x04\0\0\
> \x0c\0\0\0\x60\0\0\0\x81\x04\0\0\x0c\0\0\0\x80\0\0\0\x86\x04\0\0\x0c\0\0\0\xa0\
> \0\0\0\x8f\x04\0\0\x0c\0\0\0\xc0\0\0\0\x97\x04\0\0\x1c\0\0\0\xe0\0\0\0\x9f\x04\
> \0\0\x0c\0\0\0\x60\x01\0\0\xa8\x04\0\0\x14\0\0\0\x80\x01\0\0\xb1\x04\0\0\x0c\0\
> \0\0\xa0\x01\0\0\xb9\x04\0\0\x1c\0\0\0\xc0\x01\0\0\xc1\x04\0\0\x0c\0\0\0\x40\
> \x02\0\0\xc7\x04\0\0\x0a\0\0\0\x60\x02\0\0\0\0\0\0\0\0\0\x02\x1f\0\0\0\xd8\x04\
> \0\0\x21\0\0\x04\xc0\0\0\0\xe2\x04\0\0\x0c\0\0\0\0\0\0\0\xe6\x04\0\0\x0c\0\0\0\
> \x20\0\0\0\x81\x04\0\0\x0c\0\0\0\x40\0\0\0\xef\x04\0\0\x0c\0\0\0\x60\0\0\0\x78\
> \x04\0\0\x0c\0\0\0\x80\0\0\0\xfd\x04\0\0\x0c\0\0\0\xa0\0\0\0\x0a\x05\0\0\x0c\0\
> \0\0\xc0\0\0\0\x13\x05\0\0\x0c\0\0\0\xe0\0\0\0\x86\x04\0\0\x0c\0\0\0\0\x01\0\0\
> \x1e\x05\0\0\x0c\0\0\0\x20\x01\0\0\x2e\x05\0\0\x0c\0\0\0\x40\x01\0\0\x36\x05\0\
> \0\x0c\0\0\0\x60\x01\0\0\x3f\x05\0\0\x22\0\0\0\x80\x01\0\0\x42\x05\0\0\x0c\0\0\
> \0\x20\x02\0\0\x47\x05\0\0\x0c\0\0\0\x40\x02\0\0\x52\x05\0\0\x0c\0\0\0\x60\x02\
> \0\0\x57\x05\0\0\x0c\0\0\0\x80\x02\0\0\x60\x05\0\0\x0c\0\0\0\xa0\x02\0\0\x6c\
> \x04\0\0\x0c\0\0\0\xc0\x02\0\0\x68\x05\0\0\x0c\0\0\0\xe0\x02\0\0\x73\x05\0\0\
> \x0c\0\0\0\0\x03\0\0\x7d\x05\0\0\x1c\0\0\0\x20\x03\0\0\x88\x05\0\0\x1c\0\0\0\
> \xa0\x03\0\0\x92\x05\0\0\x0c\0\0\0\x20\x04\0\0\x9e\x05\0\0\x0c\0\0\0\x40\x04\0\
> \0\xa9\x05\0\0\x0c\0\0\0\x60\x04\0\0\0\0\0\0\x17\0\0\0\x80\x04\0\0\xb3\x05\0\0\
> \x0f\0\0\0\xc0\x04\0\0\xba\x05\0\0\x0c\0\0\0\0\x05\0\0\xc3\x05\0\0\x0c\0\0\0\
> \x20\x05\0\0\0\0\0\0\x1e\0\0\0\x40\x05\0\0\xcc\x05\0\0\x0c\0\0\0\x80\x05\0\0\
> \xd5\x05\0\0\x0f\0\0\0\xc0\x05\0\0\0\0\0\0\0\0\0\x03\0\0\0\0\x0c\0\0\0\x10\0\0\
> \0\x05\0\0\0\0\0\0\0\0\0\0\x0a\x21\0\0\0\0\0\0\0\0\0\0\x02\0\0\0\0\0\0\0\0\x03\
> \0\0\x04\x18\0\0\0\x73\x04\0\0\x27\0\0\0\0\0\0\0\xde\x05\0\0\x28\0\0\0\x40\0\0\
> \0\xe2\x05\0\0\x29\0\0\0\x80\0\0\0\0\0\0\0\0\0\0\x03\0\0\0\0\x09\0\0\0\x10\0\0\
> \0\x01\0\0\0\0\0\0\0\0\0\0\x02\x26\0\0\0\0\0\0\0\0\0\0\x02\x0c\0\0\0\0\0\0\0\0\
> \0\0\x02\x03\0\0\0\0\0\0\0\0\0\0\x03\0\0\0\0\x13\0\0\0\x10\0\0\0\x12\0\0\0\0\0\
> \0\0\0\0\0\x0a\x2a\0\0\0\0\0\0\0\x02\0\0\x0d\x24\0\0\0\0\0\0\0\x24\0\0\0\0\0\0\
> \0\x2e\0\0\0\0\0\0\0\0\0\0\x0a\0\0\0\0\0\0\0\0\0\0\0\x02\x2d\0\0\0\0\0\0\0\x01\
> \0\0\x0d\x09\0\0\0\x53\x04\0\0\x30\0\0\0\0\0\0\0\0\0\0\x02\x23\0\0\0\xe8\x05\0\
> \0\0\0\0\x0e\x2b\0\0\0\0\0\0\0\xf1\x05\0\0\0\0\0\x0e\x05\0\0\0\x01\0\0\0\xff\
> \x05\0\0\0\0\0\x0e\x25\0\0\0\x01\0\0\0\x0d\x06\0\0\x01\0\0\x0c\x2f\0\0\0\x1d\
> \x06\0\0\x01\0\0\x0c\x2f\0\0\0\x2d\x06\0\0\0\0\0\x0c\x2f\0\0\0\x4e\x06\0\0\x01\
> \0\0\x0f\x01\0\0\0\x32\0\0\0\0\0\0\0\x01\0\0\0\x54\x06\0\0\x01\0\0\x0f\x12\0\0\
> \0\x31\0\0\0\0\0\0\0\x12\0\0\0\x5c\x06\0\0\x01\0\0\x0f\x18\0\0\0\x33\0\0\0\0\0\
> \0\0\x18\0\0\0\0\x73\x69\x67\x6e\x65\x64\x20\x63\x68\x61\x72\0\x75\x6e\x73\x69\
> \x67\x6e\x65\x64\x20\x63\x68\x61\x72\0\x5f\x5f\x75\x38\0\x73\x68\x6f\x72\x74\
> \x20\x69\x6e\x74\0\x73\x68\x6f\x72\x74\x20\x75\x6e\x73\x69\x67\x6e\x65\x64\x20\
> \x69\x6e\x74\0\x5f\x5f\x75\x31\x36\0\x69\x6e\x74\0\x5f\x5f\x73\x33\x32\0\x75\
> \x6e\x73\x69\x67\x6e\x65\x64\x20\x69\x6e\x74\0\x5f\x5f\x75\x33\x32\0\x6c\x6f\
> \x6e\x67\x20\x6c\x6f\x6e\x67\x20\x69\x6e\x74\0\x6c\x6f\x6e\x67\x20\x6c\x6f\x6e\
> \x67\x20\x75\x6e\x73\x69\x67\x6e\x65\x64\x20\x69\x6e\x74\0\x5f\x5f\x75\x36\x34\
> \0\x6c\x6f\x6e\x67\x20\x75\x6e\x73\x69\x67\x6e\x65\x64\x20\x69\x6e\x74\0\x6c\
> \x6f\x6e\x67\x20\x69\x6e\x74\0\x63\x68\x61\x72\0\x5f\x5f\x62\x65\x31\x36\0\x5f\
> \x5f\x62\x65\x33\x32\0\x62\x70\x66\x5f\x6d\x61\x70\x5f\x74\x79\x70\x65\0\x42\
> \x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x55\x4e\x53\x50\x45\x43\0\x42\
> \x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x48\x41\x53\x48\0\x42\x50\x46\
> \x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x41\x52\x52\x41\x59\0\x42\x50\x46\x5f\
> \x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x50\x52\x4f\x47\x5f\x41\x52\x52\x41\x59\0\
> \x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x50\x45\x52\x46\x5f\x45\
> \x56\x45\x4e\x54\x5f\x41\x52\x52\x41\x59\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\
> \x59\x50\x45\x5f\x50\x45\x52\x43\x50\x55\x5f\x48\x41\x53\x48\0\x42\x50\x46\x5f\
> \x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x50\x45\x52\x43\x50\x55\x5f\x41\x52\x52\
> \x41\x59\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x53\x54\x41\x43\
> \x4b\x5f\x54\x52\x41\x43\x45\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\
> \x5f\x43\x47\x52\x4f\x55\x50\x5f\x41\x52\x52\x41\x59\0\x42\x50\x46\x5f\x4d\x41\
> \x50\x5f\x54\x59\x50\x45\x5f\x4c\x52\x55\x5f\x48\x41\x53\x48\0\x42\x50\x46\x5f\
> \x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x4c\x52\x55\x5f\x50\x45\x52\x43\x50\x55\
> \x5f\x48\x41\x53\x48\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x4c\
> \x50\x4d\x5f\x54\x52\x49\x45\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\
> \x5f\x41\x52\x52\x41\x59\x5f\x4f\x46\x5f\x4d\x41\x50\x53\0\x42\x50\x46\x5f\x4d\
> \x41\x50\x5f\x54\x59\x50\x45\x5f\x48\x41\x53\x48\x5f\x4f\x46\x5f\x4d\x41\x50\
> \x53\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x44\x45\x56\x4d\x41\
> \x50\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x53\x4f\x43\x4b\x4d\
> \x41\x50\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x43\x50\x55\x4d\
> \x41\x50\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x58\x53\x4b\x4d\
> \x41\x50\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x53\x4f\x43\x4b\
> \x48\x41\x53\x48\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x43\x47\
> \x52\x4f\x55\x50\x5f\x53\x54\x4f\x52\x41\x47\x45\0\x42\x50\x46\x5f\x4d\x41\x50\
> \x5f\x54\x59\x50\x45\x5f\x52\x45\x55\x53\x45\x50\x4f\x52\x54\x5f\x53\x4f\x43\
> \x4b\x41\x52\x52\x41\x59\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\
> \x50\x45\x52\x43\x50\x55\x5f\x43\x47\x52\x4f\x55\x50\x5f\x53\x54\x4f\x52\x41\
> \x47\x45\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x51\x55\x45\x55\
> \x45\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x53\x54\x41\x43\x4b\
> \0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x53\x4b\x5f\x53\x54\x4f\
> \x52\x41\x47\x45\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x44\x45\
> \x56\x4d\x41\x50\x5f\x48\x41\x53\x48\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\
> \x50\x45\x5f\x53\x54\x52\x55\x43\x54\x5f\x4f\x50\x53\0\x42\x50\x46\x5f\x4d\x41\
> \x50\x5f\x54\x59\x50\x45\x5f\x52\x49\x4e\x47\x42\x55\x46\0\x42\x50\x46\x5f\x4d\
> \x41\x50\x5f\x54\x59\x50\x45\x5f\x49\x4e\x4f\x44\x45\x5f\x53\x54\x4f\x52\x41\
> \x47\x45\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\x45\x5f\x54\x41\x53\x4b\
> \x5f\x53\x54\x4f\x52\x41\x47\x45\0\x42\x50\x46\x5f\x4d\x41\x50\x5f\x54\x59\x50\
> \x45\x5f\x42\x4c\x4f\x4f\x4d\x5f\x46\x49\x4c\x54\x45\x52\0\x66\x6c\x6f\x77\x5f\
> \x6b\x65\x79\x73\0\x62\x70\x66\x5f\x66\x6c\x6f\x77\x5f\x6b\x65\x79\x73\0\x6e\
> \x68\x6f\x66\x66\0\x74\x68\x6f\x66\x66\0\x61\x64\x64\x72\x5f\x70\x72\x6f\x74\
> \x6f\0\x69\x73\x5f\x66\x72\x61\x67\0\x69\x73\x5f\x66\x69\x72\x73\x74\x5f\x66\
> \x72\x61\x67\0\x69\x73\x5f\x65\x6e\x63\x61\x70\0\x69\x70\x5f\x70\x72\x6f\x74\
> \x6f\0\x6e\x5f\x70\x72\x6f\x74\x6f\0\x73\x70\x6f\x72\x74\0\x64\x70\x6f\x72\x74\
> \0\x66\x6c\x61\x67\x73\0\x66\x6c\x6f\x77\x5f\x6c\x61\x62\x65\x6c\0\x69\x70\x76\
> \x34\x5f\x73\x72\x63\0\x69\x70\x76\x34\x5f\x64\x73\x74\0\x69\x70\x76\x36\x5f\
> \x73\x72\x63\0\x69\x70\x76\x36\x5f\x64\x73\x74\0\x73\x6b\0\x62\x70\x66\x5f\x73\
> \x6f\x63\x6b\0\x62\x6f\x75\x6e\x64\x5f\x64\x65\x76\x5f\x69\x66\0\x66\x61\x6d\
> \x69\x6c\x79\0\x74\x79\x70\x65\0\x70\x72\x6f\x74\x6f\x63\x6f\x6c\0\x6d\x61\x72\
> \x6b\0\x70\x72\x69\x6f\x72\x69\x74\x79\0\x73\x72\x63\x5f\x69\x70\x34\0\x73\x72\
> \x63\x5f\x69\x70\x36\0\x73\x72\x63\x5f\x70\x6f\x72\x74\0\x64\x73\x74\x5f\x70\
> \x6f\x72\x74\0\x64\x73\x74\x5f\x69\x70\x34\0\x64\x73\x74\x5f\x69\x70\x36\0\x73\
> \x74\x61\x74\x65\0\x72\x78\x5f\x71\x75\x65\x75\x65\x5f\x6d\x61\x70\x70\x69\x6e\
> \x67\0\x5f\x5f\x73\x6b\x5f\x62\x75\x66\x66\0\x6c\x65\x6e\0\x70\x6b\x74\x5f\x74\
> \x79\x70\x65\0\x71\x75\x65\x75\x65\x5f\x6d\x61\x70\x70\x69\x6e\x67\0\x76\x6c\
> \x61\x6e\x5f\x70\x72\x65\x73\x65\x6e\x74\0\x76\x6c\x61\x6e\x5f\x74\x63\x69\0\
> \x76\x6c\x61\x6e\x5f\x70\x72\x6f\x74\x6f\0\x69\x6e\x67\x72\x65\x73\x73\x5f\x69\
> \x66\x69\x6e\x64\x65\x78\0\x69\x66\x69\x6e\x64\x65\x78\0\x74\x63\x5f\x69\x6e\
> \x64\x65\x78\0\x63\x62\0\x68\x61\x73\x68\0\x74\x63\x5f\x63\x6c\x61\x73\x73\x69\
> \x64\0\x64\x61\x74\x61\0\x64\x61\x74\x61\x5f\x65\x6e\x64\0\x6e\x61\x70\x69\x5f\
> \x69\x64\0\x72\x65\x6d\x6f\x74\x65\x5f\x69\x70\x34\0\x6c\x6f\x63\x61\x6c\x5f\
> \x69\x70\x34\0\x72\x65\x6d\x6f\x74\x65\x5f\x69\x70\x36\0\x6c\x6f\x63\x61\x6c\
> \x5f\x69\x70\x36\0\x72\x65\x6d\x6f\x74\x65\x5f\x70\x6f\x72\x74\0\x6c\x6f\x63\
> \x61\x6c\x5f\x70\x6f\x72\x74\0\x64\x61\x74\x61\x5f\x6d\x65\x74\x61\0\x74\x73\
> \x74\x61\x6d\x70\0\x77\x69\x72\x65\x5f\x6c\x65\x6e\0\x67\x73\x6f\x5f\x73\x65\
> \x67\x73\0\x67\x73\x6f\x5f\x73\x69\x7a\x65\0\x68\x77\x74\x73\x74\x61\x6d\x70\0\
> \x6b\x65\x79\0\x76\x61\x6c\x75\x65\0\x5f\x6c\x69\x63\x65\x6e\x73\x65\0\x69\x73\
> \x5f\x61\x6c\x6c\x6f\x77\x5f\x6c\x69\x73\x74\0\x73\x64\x5f\x72\x65\x73\x74\x72\
> \x69\x63\x74\x69\x66\0\x73\x64\x5f\x72\x65\x73\x74\x72\x69\x63\x74\x69\x66\x5f\
> \x69\0\x73\x64\x5f\x72\x65\x73\x74\x72\x69\x63\x74\x69\x66\x5f\x65\0\x72\x65\
> \x73\x74\x72\x69\x63\x74\x5f\x6e\x65\x74\x77\x6f\x72\x6b\x5f\x69\x6e\x74\x65\
> \x72\x66\x61\x63\x65\x73\x5f\x69\x6d\x70\x6c\0\x2e\x64\x61\x74\x61\0\x6c\x69\
> \x63\x65\x6e\x73\x65\0\x2e\x6d\x61\x70\x73\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
> \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
> \0\0\0\0\0\0\0\0\0\0\x01\0\0\0\x03\0\0\0\x20\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x40\
> \0\0\0\0\0\0\0\xe5\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\
> \0\0\x09\0\0\0\x02\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x28\x01\0\0\0\0\0\0\
> \x50\x01\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\x08\0\0\0\0\0\0\0\x18\0\0\0\0\0\0\0\x11\
> \0\0\0\x01\0\0\0\x03\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x78\x02\0\0\0\0\0\0\x01\0\0\
> \0\0\0\0\0\0\0\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x17\0\0\0\x08\0\0\
> \0\x03\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x79\x02\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
> \0\0\0\0\0\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x1c\0\0\0\x01\0\0\0\x06\0\0\0\0\0\
> \0\0\0\0\0\0\0\0\0\0\x80\x02\0\0\0\0\0\0\xb8\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x08\
> \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x2e\0\0\0\x01\0\0\0\x06\0\0\0\0\0\0\0\0\0\0\0\0\
> \0\0\0\x38\x03\0\0\0\0\0\0\xb8\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x08\0\0\0\0\0\0\0\
> \0\0\0\0\0\0\0\0\x41\0\0\0\x01\0\0\0\x02\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\xf0\x03\
> \0\0\0\0\0\0\x12\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
> \0\x49\0\0\0\x01\0\0\0\x03\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x08\x04\0\0\0\0\0\0\
> \x18\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x08\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x4f\0\0\0\
> \x01\0\0\0\x30\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x20\x04\0\0\0\0\0\0\x31\0\0\0\0\0\
> \0\0\0\0\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\xb3\0\0\0\x09\0\0\0\
> \x40\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x58\x04\0\0\0\0\0\0\x20\0\0\0\0\0\0\0\x02\0\
> \0\0\x05\0\0\0\x08\0\0\0\0\0\0\0\x10\0\0\0\0\0\0\0\xc9\0\0\0\x09\0\0\0\x40\0\0\
> \0\0\0\0\0\0\0\0\0\0\0\0\0\x78\x04\0\0\0\0\0\0\x20\0\0\0\0\0\0\0\x02\0\0\0\x06\
> \0\0\0\x08\0\0\0\0\0\0\0\x10\0\0\0\0\0\0\0\xe0\0\0\0\x01\0\0\0\0\0\0\0\0\0\0\0\
> \0\0\0\0\0\0\0\0\x98\x04\0\0\0\0\0\0\x16\x0e\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x08\0\
> \0\0\0\0\0\0\0\0\0\0\0\0\0\0";
> }
>
> #ifdef __cplusplus
> struct restrict_ifaces_bpf *restrict_ifaces_bpf::open(const struct
> bpf_object_open_opts *opts) { return
> restrict_ifaces_bpf__open_opts(opts); }
> struct restrict_ifaces_bpf *restrict_ifaces_bpf::open_and_load() {
> return restrict_ifaces_bpf__open_and_load(); }
> int restrict_ifaces_bpf::load(struct restrict_ifaces_bpf *skel) {
> return restrict_ifaces_bpf__load(skel); }
> int restrict_ifaces_bpf::attach(struct restrict_ifaces_bpf *skel) {
> return restrict_ifaces_bpf__attach(skel); }
> void restrict_ifaces_bpf::detach(struct restrict_ifaces_bpf *skel) {
> restrict_ifaces_bpf__detach(skel); }
> void restrict_ifaces_bpf::destroy(struct restrict_ifaces_bpf *skel) {
> restrict_ifaces_bpf__destroy(skel); }
> const void *restrict_ifaces_bpf::elf_bytes(size_t *sz) { return
> restrict_ifaces_bpf__elf_bytes(sz); }
> #endif /* __cplusplus */
>
> __attribute__((unused)) static void
> restrict_ifaces_bpf__assert(struct restrict_ifaces_bpf *s
> __attribute__((unused)))
> {
> #ifdef __cplusplus
> #define _Static_assert static_assert
> #endif
>     _Static_assert(sizeof(s->data->is_allow_list) == 1, "unexpected
> size of 'is_allow_list'");
> #ifdef __cplusplus
> #undef _Static_assert
> #endif
> }
>
> #endif /* __RESTRICT_IFACES_BPF_SKEL_H__ */
>
> Clang:
> $ /home/buildroot/buildroot/output/per-package/systemd/host/sbin/bpftool
> --debug gen skeleton restrict-ifaces.bpf.o
> libbpf: loading object 'restrict_ifaces_bpf' from buffer
> libbpf: elf: section(2) .symtab, size 384, link 1, flags 0, type=2
> libbpf: elf: section(3) cgroup_skb/egress, size 152, link 0, flags 6, type=1
> libbpf: sec 'cgroup_skb/egress': found program 'sd_restrictif_e' at
> insn offset 0 (0 bytes), code size 19 insns (152 bytes)
> libbpf: elf: section(4) cgroup_skb/ingress, size 152, link 0, flags 6, type=1
> libbpf: sec 'cgroup_skb/ingress': found program 'sd_restrictif_i' at
> insn offset 0 (0 bytes), code size 19 insns (152 bytes)
> libbpf: elf: section(5) .rodata, size 1, link 0, flags 2, type=1
> libbpf: elf: section(6) license, size 18, link 0, flags 2, type=1
> libbpf: license of restrict_ifaces_bpf is LGPL-2.1-or-later
> libbpf: elf: section(7) .maps, size 24, link 0, flags 3, type=1
> libbpf: elf: section(8) .relcgroup_skb/egress, size 32, link 2, flags 40, type=9
> libbpf: elf: section(9) .relcgroup_skb/ingress, size 32, link 2, flags
> 40, type=9
> libbpf: elf: section(10) .BTF, size 1988, link 0, flags 0, type=1
> libbpf: elf: section(11) .BTF.ext, size 376, link 0, flags 0, type=1
> libbpf: looking for externs among 16 symbols...
> libbpf: collected 0 externs total
> libbpf: map 'sd_restrictif': at sec_idx 7, offset 0.
> libbpf: map 'sd_restrictif': found type = 1.
> libbpf: map 'sd_restrictif': found key [6], sz = 4.
> libbpf: map 'sd_restrictif': found value [9], sz = 1.
> libbpf: map 'restrict.rodata' (global data): at sec_idx 5, offset 0, flags 480.
> libbpf: map 1 is "restrict.rodata"
> libbpf: sec '.relcgroup_skb/egress': collecting relocation for
> section(3) 'cgroup_skb/egress'
> libbpf: sec '.relcgroup_skb/egress': relo #0: insn #4 against 'sd_restrictif'
> libbpf: prog 'sd_restrictif_e': found map 0 (sd_restrictif, sec 7, off
> 0) for insn #4
> libbpf: sec '.relcgroup_skb/egress': relo #1: insn #7 against 'is_allow_list'
> libbpf: prog 'sd_restrictif_e': found data map 1 (restrict.rodata, sec
> 5, off 0) for insn 7
> libbpf: sec '.relcgroup_skb/ingress': collecting relocation for
> section(4) 'cgroup_skb/ingress'
> libbpf: sec '.relcgroup_skb/ingress': relo #0: insn #4 against 'sd_restrictif'
> libbpf: prog 'sd_restrictif_i': found map 0 (sd_restrictif, sec 7, off
> 0) for insn #4
> libbpf: sec '.relcgroup_skb/ingress': relo #1: insn #7 against 'is_allow_list'
> libbpf: prog 'sd_restrictif_i': found data map 1 (restrict.rodata, sec
> 5, off 0) for insn 7
> /* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
>
> /* THIS FILE IS AUTOGENERATED BY BPFTOOL! */
> #ifndef __RESTRICT_IFACES_BPF_SKEL_H__
> #define __RESTRICT_IFACES_BPF_SKEL_H__
>
> #include <errno.h>
> #include <stdlib.h>
> #include <bpf/libbpf.h>
>
> struct restrict_ifaces_bpf {
>     struct bpf_object_skeleton *skeleton;
>     struct bpf_object *obj;
>     struct {
>         struct bpf_map *sd_restrictif;
>         struct bpf_map *rodata;
>     } maps;
>     struct {
>         struct bpf_program *sd_restrictif_e;
>         struct bpf_program *sd_restrictif_i;
>     } progs;
>     struct {
>         struct bpf_link *sd_restrictif_e;
>         struct bpf_link *sd_restrictif_i;
>     } links;
>     struct restrict_ifaces_bpf__rodata {
>         __u8 is_allow_list;
>     } *rodata;
>
> #ifdef __cplusplus
>     static inline struct restrict_ifaces_bpf *open(const struct
> bpf_object_open_opts *opts = nullptr);
>     static inline struct restrict_ifaces_bpf *open_and_load();
>     static inline int load(struct restrict_ifaces_bpf *skel);
>     static inline int attach(struct restrict_ifaces_bpf *skel);
>     static inline void detach(struct restrict_ifaces_bpf *skel);
>     static inline void destroy(struct restrict_ifaces_bpf *skel);
>     static inline const void *elf_bytes(size_t *sz);
> #endif /* __cplusplus */
> };
>
> static void
> restrict_ifaces_bpf__destroy(struct restrict_ifaces_bpf *obj)
> {
>     if (!obj)
>         return;
>     if (obj->skeleton)
>         bpf_object__destroy_skeleton(obj->skeleton);
>     free(obj);
> }
>
> static inline int
> restrict_ifaces_bpf__create_skeleton(struct restrict_ifaces_bpf *obj);
>
> static inline struct restrict_ifaces_bpf *
> restrict_ifaces_bpf__open_opts(const struct bpf_object_open_opts *opts)
> {
>     struct restrict_ifaces_bpf *obj;
>     int err;
>
>     obj = (struct restrict_ifaces_bpf *)calloc(1, sizeof(*obj));
>     if (!obj) {
>         errno = ENOMEM;
>         return NULL;
>     }
>
>     err = restrict_ifaces_bpf__create_skeleton(obj);
>     if (err)
>         goto err_out;
>
>     err = bpf_object__open_skeleton(obj->skeleton, opts);
>     if (err)
>         goto err_out;
>
>     return obj;
> err_out:
>     restrict_ifaces_bpf__destroy(obj);
>     errno = -err;
>     return NULL;
> }
>
> static inline struct restrict_ifaces_bpf *
> restrict_ifaces_bpf__open(void)
> {
>     return restrict_ifaces_bpf__open_opts(NULL);
> }
>
> static inline int
> restrict_ifaces_bpf__load(struct restrict_ifaces_bpf *obj)
> {
>     return bpf_object__load_skeleton(obj->skeleton);
> }
>
> static inline struct restrict_ifaces_bpf *
> restrict_ifaces_bpf__open_and_load(void)
> {
>     struct restrict_ifaces_bpf *obj;
>     int err;
>
>     obj = restrict_ifaces_bpf__open();
>     if (!obj)
>         return NULL;
>     err = restrict_ifaces_bpf__load(obj);
>     if (err) {
>         restrict_ifaces_bpf__destroy(obj);
>         errno = -err;
>         return NULL;
>     }
>     return obj;
> }
>
> static inline int
> restrict_ifaces_bpf__attach(struct restrict_ifaces_bpf *obj)
> {
>     return bpf_object__attach_skeleton(obj->skeleton);
> }
>
> static inline void
> restrict_ifaces_bpf__detach(struct restrict_ifaces_bpf *obj)
> {
>     return bpf_object__detach_skeleton(obj->skeleton);
> }
>
> static inline const void *restrict_ifaces_bpf__elf_bytes(size_t *sz);
>
> static inline int
> restrict_ifaces_bpf__create_skeleton(struct restrict_ifaces_bpf *obj)
> {
>     struct bpf_object_skeleton *s;
>     int err;
>
>     s = (struct bpf_object_skeleton *)calloc(1, sizeof(*s));
>     if (!s)    {
>         err = -ENOMEM;
>         goto err;
>     }
>
>     s->sz = sizeof(*s);
>     s->name = "restrict_ifaces_bpf";
>     s->obj = &obj->obj;
>
>     /* maps */
>     s->map_cnt = 2;
>     s->map_skel_sz = sizeof(*s->maps);
>     s->maps = (struct bpf_map_skeleton *)calloc(s->map_cnt, s->map_skel_sz);
>     if (!s->maps) {
>         err = -ENOMEM;
>         goto err;
>     }
>
>     s->maps[0].name = "sd_restrictif";
>     s->maps[0].map = &obj->maps.sd_restrictif;
>
>     s->maps[1].name = "restrict.rodata";
>     s->maps[1].map = &obj->maps.rodata;
>     s->maps[1].mmaped = (void **)&obj->rodata;
>
>     /* programs */
>     s->prog_cnt = 2;
>     s->prog_skel_sz = sizeof(*s->progs);
>     s->progs = (struct bpf_prog_skeleton *)calloc(s->prog_cnt, s->prog_skel_sz);
>     if (!s->progs) {
>         err = -ENOMEM;
>         goto err;
>     }
>
>     s->progs[0].name = "sd_restrictif_e";
>     s->progs[0].prog = &obj->progs.sd_restrictif_e;
>     s->progs[0].link = &obj->links.sd_restrictif_e;
>
>     s->progs[1].name = "sd_restrictif_i";
>     s->progs[1].prog = &obj->progs.sd_restrictif_i;
>     s->progs[1].link = &obj->links.sd_restrictif_i;
>
>     s->data = (void *)restrict_ifaces_bpf__elf_bytes(&s->data_sz);
>
>     obj->skeleton = s;
>     return 0;
> err:
>     bpf_object__destroy_skeleton(s);
>     return err;
> }
>
> static inline const void *restrict_ifaces_bpf__elf_bytes(size_t *sz)
> {
>     *sz = 4272;
>     return (const void *)"\
> \x7f\x45\x4c\x46\x02\x01\x01\0\0\0\0\0\0\0\0\0\x01\0\xf7\0\x01\0\0\0\0\0\0\0\0\
> \0\0\0\0\0\0\0\0\0\0\0\xb0\x0d\0\0\0\0\0\0\0\0\0\0\x40\0\0\0\0\0\x40\0\x0c\0\
> \x01\0\0\x2e\x73\x74\x72\x74\x61\x62\0\x2e\x73\x79\x6d\x74\x61\x62\0\x63\x67\
> \x72\x6f\x75\x70\x5f\x73\x6b\x62\x2f\x65\x67\x72\x65\x73\x73\0\x63\x67\x72\x6f\
> \x75\x70\x5f\x73\x6b\x62\x2f\x69\x6e\x67\x72\x65\x73\x73\0\x2e\x72\x6f\x64\x61\
> \x74\x61\0\x6c\x69\x63\x65\x6e\x73\x65\0\x2e\x6d\x61\x70\x73\0\x72\x65\x73\x74\
> \x72\x69\x63\x74\x2d\x69\x66\x61\x63\x65\x73\x2e\x62\x70\x66\x2e\x63\0\x4c\x42\
> \x42\x30\x5f\x32\0\x4c\x42\x42\x30\x5f\x33\0\x4c\x42\x42\x30\x5f\x34\0\x4c\x42\
> \x42\x31\x5f\x32\0\x4c\x42\x42\x31\x5f\x33\0\x4c\x42\x42\x31\x5f\x34\0\x5f\x6c\
> \x69\x63\x65\x6e\x73\x65\0\x73\x64\x5f\x72\x65\x73\x74\x72\x69\x63\x74\x69\x66\
> \x5f\x65\0\x73\x64\x5f\x72\x65\x73\x74\x72\x69\x63\x74\x69\x66\0\x69\x73\x5f\
> \x61\x6c\x6c\x6f\x77\x5f\x6c\x69\x73\x74\0\x73\x64\x5f\x72\x65\x73\x74\x72\x69\
> \x63\x74\x69\x66\x5f\x69\0\x2e\x72\x65\x6c\x63\x67\x72\x6f\x75\x70\x5f\x73\x6b\
> \x62\x2f\x65\x67\x72\x65\x73\x73\0\x2e\x72\x65\x6c\x63\x67\x72\x6f\x75\x70\x5f\
> \x73\x6b\x62\x2f\x69\x6e\x67\x72\x65\x73\x73\0\x2e\x42\x54\x46\0\x2e\x42\x54\
> \x46\x2e\x65\x78\x74\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
> \x4c\0\0\0\x04\0\xf1\xff\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x03\0\x03\0\0\
> \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x62\0\0\0\0\0\x03\0\x70\0\0\0\0\0\0\0\0\0\0\0\0\
> \0\0\0\x69\0\0\0\0\0\x03\0\x80\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x70\0\0\0\0\0\x03\
> \0\x88\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x03\0\x04\0\0\0\0\0\0\0\0\0\0\0\0\
> \0\0\0\0\0\x77\0\0\0\0\0\x04\0\x70\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x7e\0\0\0\0\0\
> \x04\0\x80\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x85\0\0\0\0\0\x04\0\x88\0\0\0\0\0\0\0\
> \0\0\0\0\0\0\0\0\x8c\0\0\0\x01\0\x06\0\0\0\0\0\0\0\0\0\x12\0\0\0\0\0\0\0\0\0\0\
> \0\x03\0\x06\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x95\0\0\0\x12\0\x03\0\0\0\0\0\0\
> \0\0\0\x98\0\0\0\0\0\0\0\xa5\0\0\0\x11\0\x07\0\0\0\0\0\0\0\0\0\x18\0\0\0\0\0\0\
> \0\xb3\0\0\0\x11\0\x05\0\0\0\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\xc1\0\0\0\x12\0\x04\
> \0\0\0\0\0\0\0\0\0\x98\0\0\0\0\0\0\0\x61\x11\x28\0\0\0\0\0\x63\x1a\xfc\xff\0\0\
> \0\0\xbf\xa2\0\0\0\0\0\0\x07\x02\0\0\xfc\xff\xff\xff\x18\x01\0\0\0\0\0\0\0\0\0\
> \0\0\0\0\0\x85\0\0\0\x01\0\0\0\x18\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x71\x11\0\0\
> \0\0\0\0\x15\x01\x03\0\0\0\0\0\xb7\x01\0\0\x01\0\0\0\x15\0\x03\0\0\0\0\0\x05\0\
> \x03\0\0\0\0\0\xb7\x01\0\0\x01\0\0\0\x15\0\x01\0\0\0\0\0\xb7\x01\0\0\0\0\0\0\
> \xbf\x10\0\0\0\0\0\0\x95\0\0\0\0\0\0\0\x61\x11\x28\0\0\0\0\0\x63\x1a\xfc\xff\0\
> \0\0\0\xbf\xa2\0\0\0\0\0\0\x07\x02\0\0\xfc\xff\xff\xff\x18\x01\0\0\0\0\0\0\0\0\
> \0\0\0\0\0\0\x85\0\0\0\x01\0\0\0\x18\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x71\x11\0\
> \0\0\0\0\0\x15\x01\x03\0\0\0\0\0\xb7\x01\0\0\x01\0\0\0\x15\0\x03\0\0\0\0\0\x05\
> \0\x03\0\0\0\0\0\xb7\x01\0\0\x01\0\0\0\x15\0\x01\0\0\0\0\0\xb7\x01\0\0\0\0\0\0\
> \xbf\x10\0\0\0\0\0\0\x95\0\0\0\0\0\0\0\0\x4c\x47\x50\x4c\x2d\x32\x2e\x31\x2d\
> \x6f\x72\x2d\x6c\x61\x74\x65\x72\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
> \0\0\0\0\0\0\0\x20\0\0\0\0\0\0\0\x01\0\0\0\x0d\0\0\0\x38\0\0\0\0\0\0\0\x01\0\0\
> \0\x0e\0\0\0\x20\0\0\0\0\0\0\0\x01\0\0\0\x0d\0\0\0\x38\0\0\0\0\0\0\0\x01\0\0\0\
> \x0e\0\0\0\x9f\xeb\x01\0\x18\0\0\0\0\0\0\0\x10\x04\0\0\x10\x04\0\0\x9c\x03\0\0\
> \0\0\0\0\0\0\0\x02\x03\0\0\0\x01\0\0\0\0\0\0\x01\x04\0\0\0\x20\0\0\x01\0\0\0\0\
> \0\0\0\x03\0\0\0\0\x02\0\0\0\x04\0\0\0\x01\0\0\0\x05\0\0\0\0\0\0\x01\x04\0\0\0\
> \x20\0\0\0\0\0\0\0\0\0\0\x02\x06\0\0\0\x19\0\0\0\0\0\0\x08\x07\0\0\0\x1f\0\0\0\
> \0\0\0\x01\x04\0\0\0\x20\0\0\0\0\0\0\0\0\0\0\x02\x09\0\0\0\x2c\0\0\0\0\0\0\x08\
> \x0a\0\0\0\x31\0\0\0\0\0\0\x01\x01\0\0\0\x08\0\0\0\0\0\0\0\x03\0\0\x04\x18\0\0\
> \0\x3f\0\0\0\x01\0\0\0\0\0\0\0\x44\0\0\0\x05\0\0\0\x40\0\0\0\x48\0\0\0\x08\0\0\
> \0\x80\0\0\0\x4e\0\0\0\0\0\0\x0e\x0b\0\0\0\x01\0\0\0\0\0\0\0\0\0\0\x02\x0e\0\0\
> \0\0\0\0\0\0\0\0\x0a\x0f\0\0\0\x5c\0\0\0\x21\0\0\x04\xc0\0\0\0\x66\0\0\0\x06\0\
> \0\0\0\0\0\0\x6a\0\0\0\x06\0\0\0\x20\0\0\0\x73\0\0\0\x06\0\0\0\x40\0\0\0\x78\0\
> \0\0\x06\0\0\0\x60\0\0\0\x86\0\0\0\x06\0\0\0\x80\0\0\0\x8f\0\0\0\x06\0\0\0\xa0\
> \0\0\0\x9c\0\0\0\x06\0\0\0\xc0\0\0\0\xa5\0\0\0\x06\0\0\0\xe0\0\0\0\xb0\0\0\0\
> \x06\0\0\0\0\x01\0\0\xb9\0\0\0\x06\0\0\0\x20\x01\0\0\xc9\0\0\0\x06\0\0\0\x40\
> \x01\0\0\xd1\0\0\0\x06\0\0\0\x60\x01\0\0\xda\0\0\0\x10\0\0\0\x80\x01\0\0\xdd\0\
> \0\0\x06\0\0\0\x20\x02\0\0\xe2\0\0\0\x06\0\0\0\x40\x02\0\0\xed\0\0\0\x06\0\0\0\
> \x60\x02\0\0\xf2\0\0\0\x06\0\0\0\x80\x02\0\0\xfb\0\0\0\x06\0\0\0\xa0\x02\0\0\
> \x03\x01\0\0\x06\0\0\0\xc0\x02\0\0\x0a\x01\0\0\x06\0\0\0\xe0\x02\0\0\x15\x01\0\
> \0\x06\0\0\0\0\x03\0\0\x1f\x01\0\0\x11\0\0\0\x20\x03\0\0\x2a\x01\0\0\x11\0\0\0\
> \xa0\x03\0\0\x34\x01\0\0\x06\0\0\0\x20\x04\0\0\x40\x01\0\0\x06\0\0\0\x40\x04\0\
> \0\x4b\x01\0\0\x06\0\0\0\x60\x04\0\0\0\0\0\0\x12\0\0\0\x80\x04\0\0\x55\x01\0\0\
> \x14\0\0\0\xc0\x04\0\0\x5c\x01\0\0\x06\0\0\0\0\x05\0\0\x65\x01\0\0\x06\0\0\0\
> \x20\x05\0\0\0\0\0\0\x16\0\0\0\x40\x05\0\0\x6e\x01\0\0\x06\0\0\0\x80\x05\0\0\
> \x77\x01\0\0\x14\0\0\0\xc0\x05\0\0\0\0\0\0\0\0\0\x03\0\0\0\0\x06\0\0\0\x04\0\0\
> \0\x05\0\0\0\0\0\0\0\0\0\0\x03\0\0\0\0\x06\0\0\0\x04\0\0\0\x04\0\0\0\0\0\0\0\
> \x01\0\0\x05\x08\0\0\0\x80\x01\0\0\x13\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x02\x22\0\0\
> \0\x8a\x01\0\0\0\0\0\x08\x15\0\0\0\x90\x01\0\0\0\0\0\x01\x08\0\0\0\x40\0\0\0\0\
> \0\0\0\x01\0\0\x05\x08\0\0\0\xa3\x01\0\0\x17\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x02\
> \x23\0\0\0\0\0\0\0\x01\0\0\x0d\x02\0\0\0\xa3\x01\0\0\x0d\0\0\0\xa6\x01\0\0\x01\
> \0\0\x0c\x18\0\0\0\xb6\x01\0\0\x01\0\0\x0c\x18\0\0\0\0\0\0\0\0\0\0\x0a\x1c\0\0\
> \0\0\0\0\0\0\0\0\x09\x09\0\0\0\xc6\x01\0\0\0\0\0\x0e\x1b\0\0\0\x01\0\0\0\0\0\0\
> \0\0\0\0\x0a\x1f\0\0\0\xd4\x01\0\0\0\0\0\x01\x01\0\0\0\x08\0\0\x01\0\0\0\0\0\0\
> \0\x03\0\0\0\0\x1e\0\0\0\x04\0\0\0\x12\0\0\0\xd9\x01\0\0\0\0\0\x0e\x20\0\0\0\0\
> \0\0\0\xe2\x01\0\0\0\0\0\x07\0\0\0\0\xf0\x01\0\0\0\0\0\x07\0\0\0\0\x61\x03\0\0\
> \x01\0\0\x0f\x01\0\0\0\x1d\0\0\0\0\0\0\0\x01\0\0\0\x69\x03\0\0\x01\0\0\x0f\x12\
> \0\0\0\x21\0\0\0\0\0\0\0\x12\0\0\0\x71\x03\0\0\x01\0\0\x0f\x18\0\0\0\x0c\0\0\0\
> \0\0\0\0\x18\0\0\0\0\x69\x6e\x74\0\x5f\x5f\x41\x52\x52\x41\x59\x5f\x53\x49\x5a\
> \x45\x5f\x54\x59\x50\x45\x5f\x5f\0\x5f\x5f\x75\x33\x32\0\x75\x6e\x73\x69\x67\
> \x6e\x65\x64\x20\x69\x6e\x74\0\x5f\x5f\x75\x38\0\x75\x6e\x73\x69\x67\x6e\x65\
> \x64\x20\x63\x68\x61\x72\0\x74\x79\x70\x65\0\x6b\x65\x79\0\x76\x61\x6c\x75\x65\
> \0\x73\x64\x5f\x72\x65\x73\x74\x72\x69\x63\x74\x69\x66\0\x5f\x5f\x73\x6b\x5f\
> \x62\x75\x66\x66\0\x6c\x65\x6e\0\x70\x6b\x74\x5f\x74\x79\x70\x65\0\x6d\x61\x72\
> \x6b\0\x71\x75\x65\x75\x65\x5f\x6d\x61\x70\x70\x69\x6e\x67\0\x70\x72\x6f\x74\
> \x6f\x63\x6f\x6c\0\x76\x6c\x61\x6e\x5f\x70\x72\x65\x73\x65\x6e\x74\0\x76\x6c\
> \x61\x6e\x5f\x74\x63\x69\0\x76\x6c\x61\x6e\x5f\x70\x72\x6f\x74\x6f\0\x70\x72\
> \x69\x6f\x72\x69\x74\x79\0\x69\x6e\x67\x72\x65\x73\x73\x5f\x69\x66\x69\x6e\x64\
> \x65\x78\0\x69\x66\x69\x6e\x64\x65\x78\0\x74\x63\x5f\x69\x6e\x64\x65\x78\0\x63\
> \x62\0\x68\x61\x73\x68\0\x74\x63\x5f\x63\x6c\x61\x73\x73\x69\x64\0\x64\x61\x74\
> \x61\0\x64\x61\x74\x61\x5f\x65\x6e\x64\0\x6e\x61\x70\x69\x5f\x69\x64\0\x66\x61\
> \x6d\x69\x6c\x79\0\x72\x65\x6d\x6f\x74\x65\x5f\x69\x70\x34\0\x6c\x6f\x63\x61\
> \x6c\x5f\x69\x70\x34\0\x72\x65\x6d\x6f\x74\x65\x5f\x69\x70\x36\0\x6c\x6f\x63\
> \x61\x6c\x5f\x69\x70\x36\0\x72\x65\x6d\x6f\x74\x65\x5f\x70\x6f\x72\x74\0\x6c\
> \x6f\x63\x61\x6c\x5f\x70\x6f\x72\x74\0\x64\x61\x74\x61\x5f\x6d\x65\x74\x61\0\
> \x74\x73\x74\x61\x6d\x70\0\x77\x69\x72\x65\x5f\x6c\x65\x6e\0\x67\x73\x6f\x5f\
> \x73\x65\x67\x73\0\x67\x73\x6f\x5f\x73\x69\x7a\x65\0\x68\x77\x74\x73\x74\x61\
> \x6d\x70\0\x66\x6c\x6f\x77\x5f\x6b\x65\x79\x73\0\x5f\x5f\x75\x36\x34\0\x75\x6e\
> \x73\x69\x67\x6e\x65\x64\x20\x6c\x6f\x6e\x67\x20\x6c\x6f\x6e\x67\0\x73\x6b\0\
> \x73\x64\x5f\x72\x65\x73\x74\x72\x69\x63\x74\x69\x66\x5f\x65\0\x73\x64\x5f\x72\
> \x65\x73\x74\x72\x69\x63\x74\x69\x66\x5f\x69\0\x69\x73\x5f\x61\x6c\x6c\x6f\x77\
> \x5f\x6c\x69\x73\x74\0\x63\x68\x61\x72\0\x5f\x6c\x69\x63\x65\x6e\x73\x65\0\x62\
> \x70\x66\x5f\x66\x6c\x6f\x77\x5f\x6b\x65\x79\x73\0\x62\x70\x66\x5f\x73\x6f\x63\
> \x6b\0\x2f\x68\x6f\x6d\x65\x2f\x62\x75\x69\x6c\x64\x72\x6f\x6f\x74\x2f\x62\x75\
> \x69\x6c\x64\x72\x6f\x6f\x74\x2f\x6f\x75\x74\x70\x75\x74\x2f\x62\x75\x69\x6c\
> \x64\x2f\x73\x79\x73\x74\x65\x6d\x64\x2d\x63\x75\x73\x74\x6f\x6d\x2f\x73\x72\
> \x63\x2f\x63\x6f\x72\x65\x2f\x62\x70\x66\x2f\x72\x65\x73\x74\x72\x69\x63\x74\
> \x5f\x69\x66\x61\x63\x65\x73\x2f\x72\x65\x73\x74\x72\x69\x63\x74\x2d\x69\x66\
> \x61\x63\x65\x73\x2e\x62\x70\x66\x2e\x63\0\x20\x20\x20\x20\x20\x20\x20\x20\x69\
> \x66\x69\x6e\x64\x65\x78\x20\x3d\x20\x73\x6b\x2d\x3e\x69\x66\x69\x6e\x64\x65\
> \x78\x3b\0\x20\x20\x20\x20\x20\x20\x20\x20\x6c\x6f\x6f\x6b\x75\x70\x5f\x72\x65\
> \x73\x75\x6c\x74\x20\x3d\x20\x62\x70\x66\x5f\x6d\x61\x70\x5f\x6c\x6f\x6f\x6b\
> \x75\x70\x5f\x65\x6c\x65\x6d\x28\x26\x73\x64\x5f\x72\x65\x73\x74\x72\x69\x63\
> \x74\x69\x66\x2c\x20\x26\x69\x66\x69\x6e\x64\x65\x78\x29\x3b\0\x20\x20\x20\x20\
> \x20\x20\x20\x20\x69\x66\x20\x28\x69\x73\x5f\x61\x6c\x6c\x6f\x77\x5f\x6c\x69\
> \x73\x74\x29\x20\x7b\0\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\
> \x20\x20\x69\x66\x20\x28\x6c\x6f\x6f\x6b\x75\x70\x5f\x72\x65\x73\x75\x6c\x74\
> \x29\0\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x69\x66\
> \x20\x28\x21\x6c\x6f\x6f\x6b\x75\x70\x5f\x72\x65\x73\x75\x6c\x74\x29\0\x20\x20\
> \x20\x20\x20\x20\x20\x20\x72\x65\x74\x75\x72\x6e\x20\x72\x65\x73\x74\x72\x69\
> \x63\x74\x5f\x6e\x65\x74\x77\x6f\x72\x6b\x5f\x69\x6e\x74\x65\x72\x66\x61\x63\
> \x65\x73\x5f\x69\x6d\x70\x6c\x28\x73\x6b\x29\x3b\0\x2e\x72\x6f\x64\x61\x74\x61\
> \0\x6c\x69\x63\x65\x6e\x73\x65\0\x2e\x6d\x61\x70\x73\0\x63\x67\x72\x6f\x75\x70\
> \x5f\x73\x6b\x62\x2f\x65\x67\x72\x65\x73\x73\0\x63\x67\x72\x6f\x75\x70\x5f\x73\
> \x6b\x62\x2f\x69\x6e\x67\x72\x65\x73\x73\0\0\0\0\0\x9f\xeb\x01\0\x20\0\0\0\0\0\
> \0\0\x24\0\0\0\x24\0\0\0\x34\x01\0\0\x58\x01\0\0\0\0\0\0\x08\0\0\0\x77\x03\0\0\
> \x01\0\0\0\0\0\0\0\x19\0\0\0\x89\x03\0\0\x01\0\0\0\0\0\0\0\x1a\0\0\0\x10\0\0\0\
> \x77\x03\0\0\x09\0\0\0\0\0\0\0\xf9\x01\0\0\x62\x02\0\0\x17\x6c\0\0\x08\0\0\0\
> \xf9\x01\0\0\x62\x02\0\0\x11\x6c\0\0\x18\0\0\0\xf9\x01\0\0\0\0\0\0\0\0\0\0\x20\
> \0\0\0\xf9\x01\0\0\x81\x02\0\0\x19\x70\0\0\x38\0\0\0\xf9\x01\0\0\xc8\x02\0\0\
> \x0d\x74\0\0\x50\0\0\0\xf9\x01\0\0\xc8\x02\0\0\x0d\x74\0\0\x60\0\0\0\xf9\x01\0\
> \0\xe5\x02\0\0\x15\x7c\0\0\x78\0\0\0\xf9\x01\0\0\x08\x03\0\0\x15\x8c\0\0\x88\0\
> \0\0\xf9\x01\0\0\x2c\x03\0\0\x09\xb0\0\0\x89\x03\0\0\x09\0\0\0\0\0\0\0\xf9\x01\
> \0\0\x62\x02\0\0\x17\x6c\0\0\x08\0\0\0\xf9\x01\0\0\x62\x02\0\0\x11\x6c\0\0\x18\
> \0\0\0\xf9\x01\0\0\0\0\0\0\0\0\0\0\x20\0\0\0\xf9\x01\0\0\x81\x02\0\0\x19\x70\0\
> \0\x38\0\0\0\xf9\x01\0\0\xc8\x02\0\0\x0d\x74\0\0\x50\0\0\0\xf9\x01\0\0\xc8\x02\
> \0\0\x0d\x74\0\0\x60\0\0\0\xf9\x01\0\0\xe5\x02\0\0\x15\x7c\0\0\x78\0\0\0\xf9\
> \x01\0\0\x08\x03\0\0\x15\x8c\0\0\x88\0\0\0\xf9\x01\0\0\x2c\x03\0\0\x09\xc4\0\0\
> \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
> \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x01\0\0\0\x03\0\0\0\x20\0\0\
> \0\0\0\0\0\0\0\0\0\0\0\0\0\x40\0\0\0\0\0\0\0\x0c\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\
> \0\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x09\0\0\0\x02\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
> \0\0\0\0\0\x50\x01\0\0\0\0\0\0\x80\x01\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\x08\0\0\0\
> \0\0\0\0\x18\0\0\0\0\0\0\0\x11\0\0\0\x01\0\0\0\x06\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
> \0\xd0\x02\0\0\0\0\0\0\x98\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x08\0\0\0\0\0\0\0\0\0\
> \0\0\0\0\0\0\x23\0\0\0\x01\0\0\0\x06\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x68\x03\0\0\
> \0\0\0\0\x98\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x08\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
> \x36\0\0\0\x01\0\0\0\x02\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x04\0\0\0\0\0\0\x01\0\
> \0\0\0\0\0\0\0\0\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x3e\0\0\0\x01\0\
> \0\0\x02\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x01\x04\0\0\0\0\0\0\x12\0\0\0\0\0\0\0\0\
> \0\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x46\0\0\0\x01\0\0\0\x03\0\0\0\
> \0\0\0\0\0\0\0\0\0\0\0\0\x18\x04\0\0\0\0\0\0\x18\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
> \x08\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\xd1\0\0\0\x09\0\0\0\x40\0\0\0\0\0\0\0\0\0\0\
> \0\0\0\0\0\x30\x04\0\0\0\0\0\0\x20\0\0\0\0\0\0\0\x02\0\0\0\x03\0\0\0\x08\0\0\0\
> \0\0\0\0\x10\0\0\0\0\0\0\0\xe7\0\0\0\x09\0\0\0\x40\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
> \0\x50\x04\0\0\0\0\0\0\x20\0\0\0\0\0\0\0\x02\0\0\0\x04\0\0\0\x08\0\0\0\0\0\0\0\
> \x10\0\0\0\0\0\0\0\xfe\0\0\0\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x70\x04\
> \0\0\0\0\0\0\xc4\x07\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x08\0\0\0\0\0\0\0\0\0\0\0\0\0\
> \0\0\x03\x01\0\0\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x38\x0c\0\0\0\0\0\0\
> \x78\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x08\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";
> }
>
> #ifdef __cplusplus
> struct restrict_ifaces_bpf *restrict_ifaces_bpf::open(const struct
> bpf_object_open_opts *opts) { return
> restrict_ifaces_bpf__open_opts(opts); }
> struct restrict_ifaces_bpf *restrict_ifaces_bpf::open_and_load() {
> return restrict_ifaces_bpf__open_and_load(); }
> int restrict_ifaces_bpf::load(struct restrict_ifaces_bpf *skel) {
> return restrict_ifaces_bpf__load(skel); }
> int restrict_ifaces_bpf::attach(struct restrict_ifaces_bpf *skel) {
> return restrict_ifaces_bpf__attach(skel); }
> void restrict_ifaces_bpf::detach(struct restrict_ifaces_bpf *skel) {
> restrict_ifaces_bpf__detach(skel); }
> void restrict_ifaces_bpf::destroy(struct restrict_ifaces_bpf *skel) {
> restrict_ifaces_bpf__destroy(skel); }
> const void *restrict_ifaces_bpf::elf_bytes(size_t *sz) { return
> restrict_ifaces_bpf__elf_bytes(sz); }
> #endif /* __cplusplus */
>
> __attribute__((unused)) static void
> restrict_ifaces_bpf__assert(struct restrict_ifaces_bpf *s
> __attribute__((unused)))
> {
> #ifdef __cplusplus
> #define _Static_assert static_assert
> #endif
>     _Static_assert(sizeof(s->rodata->is_allow_list) == 1, "unexpected
> size of 'is_allow_list'");
> #ifdef __cplusplus
> #undef _Static_assert
> #endif
> }
>
> #endif /* __RESTRICT_IFACES_BPF_SKEL_H__ */
>
>>
>>
>> > Starting program:
>> > /home/buildroot/buildroot/output/per-package/systemd/host/sbin/bpftool
>> > --debug gen skeleton
>> > output/build/systemd-custom/build/src/core/bpf/restrict_ifaces/restrict-ifaces.bpf.o
>> > [Thread debugging using libthread_db enabled]
>> > Using host libthread_db library "/usr/lib/libthread_db.so.1".
>> > libbpf: loading object 'restrict_ifaces_bpf' from buffer
>> > libbpf: elf: section(2) .symtab, size 336, link 1, flags 0, type=2
>> > libbpf: elf: section(3) .data, size 1, link 0, flags 3, type=1
>> > libbpf: elf: section(4) .bss, size 0, link 0, flags 3, type=8
>> > libbpf: elf: section(5) cgroup_skb/egress, size 184, link 0, flags 6, type=1
>> > libbpf: sec 'cgroup_skb/egress': found program 'sd_restrictif_e' at
>> > insn offset 0 (0 bytes), code size 23 insns (184 bytes)
>> > libbpf: elf: section(6) cgroup_skb/ingress, size 184, link 0, flags 6, type=1
>> > libbpf: sec 'cgroup_skb/ingress': found program 'sd_restrictif_i' at
>> > insn offset 0 (0 bytes), code size 23 insns (184 bytes)
>> > libbpf: elf: section(7) license, size 18, link 0, flags 2, type=1
>> > libbpf: license of restrict_ifaces_bpf is LGPL-2.1-or-later
>> > libbpf: elf: section(8) .maps, size 24, link 0, flags 3, type=1
>> > libbpf: elf: section(9) .comment, size 49, link 0, flags 30, type=1
>> > libbpf: elf: skipping unrecognized data section(9) .comment
>> > libbpf: elf: section(10) .relcgroup_skb/egress, size 32, link 2, flags
>> > 40, type=9
>> > libbpf: elf: section(11) .relcgroup_skb/ingress, size 32, link 2,
>> > flags 40, type=9
>> > libbpf: elf: section(12) .BTF, size 3606, link 0, flags 0, type=1
>> > libbpf: looking for externs among 14 symbols...
>> > libbpf: collected 0 externs total
>> > libbpf: map 'sd_restrictif': at sec_idx 8, offset 0.
>> > libbpf: map 'sd_restrictif': found type = 1.
>> > libbpf: map 'sd_restrictif': found key [12], sz = 4.
>> > libbpf: map 'sd_restrictif': found value [3], sz = 1.
>> >
>> > Program received signal SIGSEGV, Segmentation fault.
>> > 0x0000aaaaaab4fd2c in bpf_object.init_maps ()
>> > (gdb) bt
>> > #0  0x0000aaaaaab4fd2c in bpf_object.init_maps ()
>> > #1  0x0000aaaaaab52178 in bpf_object_open.part ()
>> > #2  0x0000aaaaaab544e8 in bpf_object.open_mem ()
>> > #3  0x0000aaaaaab2a58c in do_skeleton ()
>> > #4  0x0000aaaaaab1e204 in main ()
>> >
>> >>
>> >> diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
>> >> index e89cc9c885b3..e3a6808f0bb6 100644
>> >> --- a/tools/lib/bpf/libbpf.c
>> >> +++ b/tools/lib/bpf/libbpf.c
>> >> @@ -1591,6 +1591,10 @@ static int bpf_object__init_global_data_maps(struct bpf_object *obj)
>> >>         for (sec_idx = 1; sec_idx < obj->efile.sec_cnt; sec_idx++) {
>> >>                 sec_desc = &obj->efile.secs[sec_idx];
>> >>
>> >> +                /* Skip empty sections.  */
>> >> +                if (sec_desc->data->d_size == 0)
>> >> +                  continue;
>> >> +
>> >>                 switch (sec_desc->sec_type) {
>> >>                 case SEC_DATA:
>> >>                         sec_name = elf_sec_name(obj, elf_sec_by_idx(obj, sec_idx));
>> >>
>> >> > GCC:
>> >> > $ /home/buildroot/buildroot/output/per-package/systemd/host/sbin/bpftool
>> >> > --debug gen skeleton
>> >> > output/build/systemd-custom/build/src/core/bpf/restrict_ifaces/restrict-ifaces.bpf.o
>> >> > libbpf: loading object 'restrict_ifaces_bpf' from buffer
>> >> > libbpf: elf: section(2) .symtab, size 336, link 1, flags 0, type=2
>> >> > libbpf: elf: section(3) .data, size 1, link 0, flags 3, type=1
>> >> > libbpf: elf: section(4) .bss, size 0, link 0, flags 3, type=8
>> >> > libbpf: elf: section(5) cgroup_skb/egress, size 184, link 0, flags 6, type=1
>> >> > libbpf: sec 'cgroup_skb/egress': found program 'sd_restrictif_e' at
>> >> > insn offset 0 (0 bytes), code size 23 insns (184 bytes)
>> >> > libbpf: elf: section(6) cgroup_skb/ingress, size 184, link 0, flags 6, type=1
>> >> > libbpf: sec 'cgroup_skb/ingress': found program 'sd_restrictif_i' at
>> >> > insn offset 0 (0 bytes), code size 23 insns (184 bytes)
>> >> > libbpf: elf: section(7) license, size 18, link 0, flags 2, type=1
>> >> > libbpf: license of restrict_ifaces_bpf is LGPL-2.1-or-later
>> >> > libbpf: elf: section(8) .maps, size 24, link 0, flags 3, type=1
>> >> > libbpf: elf: section(9) .comment, size 49, link 0, flags 30, type=1
>> >> > libbpf: elf: skipping unrecognized data section(9) .comment
>> >> > libbpf: elf: section(10) .relcgroup_skb/egress, size 32, link 2, flags
>> >> > 40, type=9
>> >> > libbpf: elf: section(11) .relcgroup_skb/ingress, size 32, link 2,
>> >> > flags 40, type=9
>> >> > libbpf: elf: section(12) .BTF, size 3606, link 0, flags 0, type=1
>> >> > libbpf: looking for externs among 14 symbols...
>> >> > libbpf: collected 0 externs total
>> >> > libbpf: map 'sd_restrictif': at sec_idx 8, offset 0.
>> >> > libbpf: map 'sd_restrictif': found type = 1.
>> >> > libbpf: map 'sd_restrictif': found key [12], sz = 4.
>> >> > libbpf: map 'sd_restrictif': found value [3], sz = 1.
>> >> > libbpf: map 'restrict.data' (global data): at sec_idx 3, offset 0, flags 400.
>> >> > libbpf: map 1 is "restrict.data"
>> >> > libbpf: map 'restrict.bss' (global data): at sec_idx 4, offset 0, flags 400.
>> >> > libbpf: failed to alloc map 'restrict.bss' content buffer: -22
>> >> > Error: failed to open BPF object file: Invalid argument
>> >> >
>> >> > LLVM:
>> >> > $ /home/buildroot/buildroot/output/per-package/systemd/host/sbin/bpftool
>> >> > --debug gen skeleton restrict-ifaces.bpf.o
>> >> > libbpf: loading object 'restrict_ifaces_bpf' from buffer
>> >> > libbpf: elf: section(2) .symtab, size 384, link 1, flags 0, type=2
>> >> > libbpf: elf: section(3) cgroup_skb/egress, size 152, link 0, flags 6, type=1
>> >> > libbpf: sec 'cgroup_skb/egress': found program 'sd_restrictif_e' at
>> >> > insn offset 0 (0 bytes), code size 19 insns (152 bytes)
>> >> > libbpf: elf: section(4) cgroup_skb/ingress, size 152, link 0, flags 6, type=1
>> >> > libbpf: sec 'cgroup_skb/ingress': found program 'sd_restrictif_i' at
>> >> > insn offset 0 (0 bytes), code size 19 insns (152 bytes)
>> >> > libbpf: elf: section(5) .rodata, size 1, link 0, flags 2, type=1
>> >> > libbpf: elf: section(6) license, size 18, link 0, flags 2, type=1
>> >> > libbpf: license of restrict_ifaces_bpf is LGPL-2.1-or-later
>> >> > libbpf: elf: section(7) .maps, size 24, link 0, flags 3, type=1
>> >> > libbpf: elf: section(8) .relcgroup_skb/egress, size 32, link 2, flags 40, type=9
>> >> > libbpf: elf: section(9) .relcgroup_skb/ingress, size 32, link 2, flags
>> >> > 40, type=9
>> >> > libbpf: elf: section(10) .BTF, size 1988, link 0, flags 0, type=1
>> >> > libbpf: elf: section(11) .BTF.ext, size 376, link 0, flags 0, type=1
>> >> > libbpf: looking for externs among 16 symbols...
>> >> > libbpf: collected 0 externs total
>> >> > libbpf: map 'sd_restrictif': at sec_idx 7, offset 0.
>> >> > libbpf: map 'sd_restrictif': found type = 1.
>> >> > libbpf: map 'sd_restrictif': found key [6], sz = 4.
>> >> > libbpf: map 'sd_restrictif': found value [9], sz = 1.
>> >> > libbpf: map 'restrict.rodata' (global data): at sec_idx 5, offset 0, flags 480.
>> >> > libbpf: map 1 is "restrict.rodata"
>> >> > libbpf: sec '.relcgroup_skb/egress': collecting relocation for
>> >> > section(3) 'cgroup_skb/egress'
>> >> > libbpf: sec '.relcgroup_skb/egress': relo #0: insn #4 against 'sd_restrictif'
>> >> > libbpf: prog 'sd_restrictif_e': found map 0 (sd_restrictif, sec 7, off
>> >> > 0) for insn #4
>> >> > libbpf: sec '.relcgroup_skb/egress': relo #1: insn #7 against 'is_allow_list'
>> >> > libbpf: prog 'sd_restrictif_e': found data map 1 (restrict.rodata, sec
>> >> > 5, off 0) for insn 7
>> >> > libbpf: sec '.relcgroup_skb/ingress': collecting relocation for
>> >> > section(4) 'cgroup_skb/ingress'
>> >> > libbpf: sec '.relcgroup_skb/ingress': relo #0: insn #4 against 'sd_restrictif'
>> >> > libbpf: prog 'sd_restrictif_i': found map 0 (sd_restrictif, sec 7, off
>> >> > 0) for insn #4
>> >> > libbpf: sec '.relcgroup_skb/ingress': relo #1: insn #7 against 'is_allow_list'
>> >> > libbpf: prog 'sd_restrictif_i': found data map 1 (restrict.rodata, sec
>> >> > 5, off 0) for insn 7
>> >> >
>> >> >> >
>> >> >> > >>
>> >> >> > >> Looking at libbpf.c, it seems to me that this may be due of trying to
>> >> >> > >> mmap 0 bytes in `bpf_object__init_internal_map':
>> >> >> > >>
>> >> >> > >>         map->mmaped = mmap(NULL, bpf_map_mmap_sz(map), PROT_READ | PROT_WRITE,
>> >> >> > >>                            MAP_SHARED | MAP_ANONYMOUS, -1, 0);
>> >> >> > >>         if (map->mmaped == MAP_FAILED) {
>> >> >> > >>                 err = -errno;
>> >> >> > >>                 map->mmaped = NULL;
>> >> >> > >>                 pr_warn("failed to alloc map '%s' content buffer: %d\n",
>> >> >> > >>                         map->name, err);
>> >> >> > >>                 zfree(&map->real_name);
>> >> >> > >>                 zfree(&map->name);
>> >> >> > >>                 return err;
>> >> >> > >>         }
>> >> >> > >>
>> >> >> > >> I see no check for zero sized sections in
>> >> >> > >> bpf_object__init_global_data_maps.
>> >> >> > >>
>> >> >> > >> Is maybe GCC failing to allocate stuff in BSS that is supposed to be
>> >> >> > >> there?
>> >> >> > >>
>> >> >> > >> > Stripped file passed to gen skeleton:
>> >> >> > >> > /home/buildroot/buildroot/output/per-package/systemd/host/sbin/bpftool
>> >> >> > >> > btf dump file
>> >> >> > >> > output/build/systemd-custom/build/src/core/bpf/restrict_ifaces/restrict-ifaces.bpf.o
>> >> >> > >> > format raw
>> >> >> > >> > [1] INT 'signed char' size=1 bits_offset=0 nr_bits=8 encoding=UNKN
>> >> >> > >> > [2] INT 'unsigned char' size=1 bits_offset=0 nr_bits=8 encoding=CHAR
>> >> >> > >> > [3] TYPEDEF '__u8' type_id=2
>> >> >> > >> > [4] CONST '(anon)' type_id=3
>> >> >> > >> > [5] VOLATILE '(anon)' type_id=4
>> >> >> > >> > [6] INT 'short int' size=2 bits_offset=0 nr_bits=16 encoding=SIGNED
>> >> >> > >> > [7] INT 'short unsigned int' size=2 bits_offset=0 nr_bits=16 encoding=(none)
>> >> >> > >> > [8] TYPEDEF '__u16' type_id=7
>> >> >> > >> > [9] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED
>> >> >> > >> > [10] TYPEDEF '__s32' type_id=9
>> >> >> > >> > [11] INT 'unsigned int' size=4 bits_offset=0 nr_bits=32 encoding=(none)
>> >> >> > >> > [12] TYPEDEF '__u32' type_id=11
>> >> >> > >> > [13] INT 'long long int' size=8 bits_offset=0 nr_bits=64 encoding=SIGNED
>> >> >> > >> > [14] INT 'long long unsigned int' size=8 bits_offset=0 nr_bits=64
>> >> >> > >> > encoding=(none)
>> >> >> > >> > [15] TYPEDEF '__u64' type_id=14
>> >> >> > >> > [16] INT 'long unsigned int' size=8 bits_offset=0 nr_bits=64 encoding=(none)
>> >> >> > >> > [17] INT 'long int' size=8 bits_offset=0 nr_bits=64 encoding=SIGNED
>> >> >> > >> > [18] INT 'char' size=1 bits_offset=0 nr_bits=8 encoding=UNKN
>> >> >> > >> > [19] CONST '(anon)' type_id=18
>> >> >> > >> > [20] TYPEDEF '__be16' type_id=8
>> >> >> > >> > [21] TYPEDEF '__be32' type_id=12
>> >> >> > >> > [22] ENUM 'bpf_map_type' encoding=UNSIGNED size=4 vlen=31
>> >> >> > >> >     'BPF_MAP_TYPE_UNSPEC' val=0
>> >> >> > >> >     'BPF_MAP_TYPE_HASH' val=1
>> >> >> > >> >     'BPF_MAP_TYPE_ARRAY' val=2
>> >> >> > >> >     'BPF_MAP_TYPE_PROG_ARRAY' val=3
>> >> >> > >> >     'BPF_MAP_TYPE_PERF_EVENT_ARRAY' val=4
>> >> >> > >> >     'BPF_MAP_TYPE_PERCPU_HASH' val=5
>> >> >> > >> >     'BPF_MAP_TYPE_PERCPU_ARRAY' val=6
>> >> >> > >> >     'BPF_MAP_TYPE_STACK_TRACE' val=7
>> >> >> > >> >     'BPF_MAP_TYPE_CGROUP_ARRAY' val=8
>> >> >> > >> >     'BPF_MAP_TYPE_LRU_HASH' val=9
>> >> >> > >> >     'BPF_MAP_TYPE_LRU_PERCPU_HASH' val=10
>> >> >> > >> >     'BPF_MAP_TYPE_LPM_TRIE' val=11
>> >> >> > >> >     'BPF_MAP_TYPE_ARRAY_OF_MAPS' val=12
>> >> >> > >> >     'BPF_MAP_TYPE_HASH_OF_MAPS' val=13
>> >> >> > >> >     'BPF_MAP_TYPE_DEVMAP' val=14
>> >> >> > >> >     'BPF_MAP_TYPE_SOCKMAP' val=15
>> >> >> > >> >     'BPF_MAP_TYPE_CPUMAP' val=16
>> >> >> > >> >     'BPF_MAP_TYPE_XSKMAP' val=17
>> >> >> > >> >     'BPF_MAP_TYPE_SOCKHASH' val=18
>> >> >> > >> >     'BPF_MAP_TYPE_CGROUP_STORAGE' val=19
>> >> >> > >> >     'BPF_MAP_TYPE_REUSEPORT_SOCKARRAY' val=20
>> >> >> > >> >     'BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE' val=21
>> >> >> > >> >     'BPF_MAP_TYPE_QUEUE' val=22
>> >> >> > >> >     'BPF_MAP_TYPE_STACK' val=23
>> >> >> > >> >     'BPF_MAP_TYPE_SK_STORAGE' val=24
>> >> >> > >> >     'BPF_MAP_TYPE_DEVMAP_HASH' val=25
>> >> >> > >> >     'BPF_MAP_TYPE_STRUCT_OPS' val=26
>> >> >> > >> >     'BPF_MAP_TYPE_RINGBUF' val=27
>> >> >> > >> >     'BPF_MAP_TYPE_INODE_STORAGE' val=28
>> >> >> > >> >     'BPF_MAP_TYPE_TASK_STORAGE' val=29
>> >> >> > >> >     'BPF_MAP_TYPE_BLOOM_FILTER' val=30
>> >> >> > >> > [23] UNION '(anon)' size=8 vlen=1
>> >> >> > >> >     'flow_keys' type_id=29 bits_offset=0
>> >> >> > >> > [24] STRUCT 'bpf_flow_keys' size=56 vlen=13
>> >> >> > >> >     'nhoff' type_id=8 bits_offset=0
>> >> >> > >> >     'thoff' type_id=8 bits_offset=16
>> >> >> > >> >     'addr_proto' type_id=8 bits_offset=32
>> >> >> > >> >     'is_frag' type_id=3 bits_offset=48
>> >> >> > >> >     'is_first_frag' type_id=3 bits_offset=56
>> >> >> > >> >     'is_encap' type_id=3 bits_offset=64
>> >> >> > >> >     'ip_proto' type_id=3 bits_offset=72
>> >> >> > >> >     'n_proto' type_id=20 bits_offset=80
>> >> >> > >> >     'sport' type_id=20 bits_offset=96
>> >> >> > >> >     'dport' type_id=20 bits_offset=112
>> >> >> > >> >     '(anon)' type_id=25 bits_offset=128
>> >> >> > >> >     'flags' type_id=12 bits_offset=384
>> >> >> > >> >     'flow_label' type_id=21 bits_offset=416
>> >> >> > >> > [25] UNION '(anon)' size=32 vlen=2
>> >> >> > >> >     '(anon)' type_id=26 bits_offset=0
>> >> >> > >> >     '(anon)' type_id=27 bits_offset=0
>> >> >> > >> > [26] STRUCT '(anon)' size=8 vlen=2
>> >> >> > >> >     'ipv4_src' type_id=21 bits_offset=0
>> >> >> > >> >     'ipv4_dst' type_id=21 bits_offset=32
>> >> >> > >> > [27] STRUCT '(anon)' size=32 vlen=2
>> >> >> > >> >     'ipv6_src' type_id=28 bits_offset=0
>> >> >> > >> >     'ipv6_dst' type_id=28 bits_offset=128
>> >> >> > >> > [28] ARRAY '(anon)' type_id=12 index_type_id=16 nr_elems=4
>> >> >> > >> > [29] PTR '(anon)' type_id=24
>> >> >> > >> > [30] UNION '(anon)' size=8 vlen=1
>> >> >> > >> >     'sk' type_id=32 bits_offset=0
>> >> >> > >> > [31] STRUCT 'bpf_sock' size=80 vlen=14
>> >> >> > >> >     'bound_dev_if' type_id=12 bits_offset=0
>> >> >> > >> >     'family' type_id=12 bits_offset=32
>> >> >> > >> >     'type' type_id=12 bits_offset=64
>> >> >> > >> >     'protocol' type_id=12 bits_offset=96
>> >> >> > >> >     'mark' type_id=12 bits_offset=128
>> >> >> > >> >     'priority' type_id=12 bits_offset=160
>> >> >> > >> >     'src_ip4' type_id=12 bits_offset=192
>> >> >> > >> >     'src_ip6' type_id=28 bits_offset=224
>> >> >> > >> >     'src_port' type_id=12 bits_offset=352
>> >> >> > >> >     'dst_port' type_id=20 bits_offset=384
>> >> >> > >> >     'dst_ip4' type_id=12 bits_offset=416
>> >> >> > >> >     'dst_ip6' type_id=28 bits_offset=448
>> >> >> > >> >     'state' type_id=12 bits_offset=576
>> >> >> > >> >     'rx_queue_mapping' type_id=10 bits_offset=608
>> >> >> > >> > [32] PTR '(anon)' type_id=31
>> >> >> > >> > [33] STRUCT '__sk_buff' size=192 vlen=33
>> >> >> > >> >     'len' type_id=12 bits_offset=0
>> >> >> > >> >     'pkt_type' type_id=12 bits_offset=32
>> >> >> > >> >     'mark' type_id=12 bits_offset=64
>> >> >> > >> >     'queue_mapping' type_id=12 bits_offset=96
>> >> >> > >> >     'protocol' type_id=12 bits_offset=128
>> >> >> > >> >     'vlan_present' type_id=12 bits_offset=160
>> >> >> > >> >     'vlan_tci' type_id=12 bits_offset=192
>> >> >> > >> >     'vlan_proto' type_id=12 bits_offset=224
>> >> >> > >> >     'priority' type_id=12 bits_offset=256
>> >> >> > >> >     'ingress_ifindex' type_id=12 bits_offset=288
>> >> >> > >> >     'ifindex' type_id=12 bits_offset=320
>> >> >> > >> >     'tc_index' type_id=12 bits_offset=352
>> >> >> > >> >     'cb' type_id=34 bits_offset=384
>> >> >> > >> >     'hash' type_id=12 bits_offset=544
>> >> >> > >> >     'tc_classid' type_id=12 bits_offset=576
>> >> >> > >> >     'data' type_id=12 bits_offset=608
>> >> >> > >> >     'data_end' type_id=12 bits_offset=640
>> >> >> > >> >     'napi_id' type_id=12 bits_offset=672
>> >> >> > >> >     'family' type_id=12 bits_offset=704
>> >> >> > >> >     'remote_ip4' type_id=12 bits_offset=736
>> >> >> > >> >     'local_ip4' type_id=12 bits_offset=768
>> >> >> > >> >     'remote_ip6' type_id=28 bits_offset=800
>> >> >> > >> >     'local_ip6' type_id=28 bits_offset=928
>> >> >> > >> >     'remote_port' type_id=12 bits_offset=1056
>> >> >> > >> >     'local_port' type_id=12 bits_offset=1088
>> >> >> > >> >     'data_meta' type_id=12 bits_offset=1120
>> >> >> > >> >     '(anon)' type_id=23 bits_offset=1152
>> >> >> > >> >     'tstamp' type_id=15 bits_offset=1216
>> >> >> > >> >     'wire_len' type_id=12 bits_offset=1280
>> >> >> > >> >     'gso_segs' type_id=12 bits_offset=1312
>> >> >> > >> >     '(anon)' type_id=30 bits_offset=1344
>> >> >> > >> >     'gso_size' type_id=12 bits_offset=1408
>> >> >> > >> >     'hwtstamp' type_id=15 bits_offset=1472
>> >> >> > >> > [34] ARRAY '(anon)' type_id=12 index_type_id=16 nr_elems=5
>> >> >> > >> > [35] CONST '(anon)' type_id=33
>> >> >> > >> > [36] PTR '(anon)' type_id=0
>> >> >> > >> > [37] STRUCT '(anon)' size=24 vlen=3
>> >> >> > >> >     'type' type_id=39 bits_offset=0
>> >> >> > >> >     'key' type_id=40 bits_offset=64
>> >> >> > >> >     'value' type_id=41 bits_offset=128
>> >> >> > >> > [38] ARRAY '(anon)' type_id=9 index_type_id=16 nr_elems=1
>> >> >> > >> > [39] PTR '(anon)' type_id=38
>> >> >> > >> > [40] PTR '(anon)' type_id=12
>> >> >> > >> > [41] PTR '(anon)' type_id=3
>> >> >> > >> > [42] ARRAY '(anon)' type_id=19 index_type_id=16 nr_elems=18
>> >> >> > >> > [43] CONST '(anon)' type_id=42
>> >> >> > >> > [44] FUNC_PROTO '(anon)' ret_type_id=36 vlen=2
>> >> >> > >> >     '(anon)' type_id=36
>> >> >> > >> >     '(anon)' type_id=46
>> >> >> > >> > [45] CONST '(anon)' type_id=0
>> >> >> > >> > [46] PTR '(anon)' type_id=45
>> >> >> > >> > [47] FUNC_PROTO '(anon)' ret_type_id=9 vlen=1
>> >> >> > >> >     'sk' type_id=48
>> >> >> > >> > [48] PTR '(anon)' type_id=35
>> >> >> > >> > [49] VAR '_license' type_id=43, linkage=static
>> >> >> > >> > [50] VAR 'is_allow_list' type_id=5, linkage=global
>> >> >> > >> > [51] VAR 'sd_restrictif' type_id=37, linkage=global
>> >> >> > >> > [52] FUNC 'sd_restrictif_i' type_id=47 linkage=global
>> >> >> > >> > [53] FUNC 'sd_restrictif_e' type_id=47 linkage=global
>> >> >> > >> > [54] FUNC 'restrict_network_interfaces_impl' type_id=47 linkage=static
>> >> >> > >> > [55] DATASEC '.data' size=1 vlen=1
>> >> >> > >> >     type_id=50 offset=0 size=1 (VAR 'is_allow_list')
>> >> >> > >> > [56] DATASEC 'license' size=18 vlen=1
>> >> >> > >> >     type_id=49 offset=0 size=18 (VAR '_license')
>> >> >> > >> > [57] DATASEC '.maps' size=24 vlen=1
>> >> >> > >> >     type_id=51 offset=0 size=24 (VAR 'sd_restrictif')
>> >> >> > >> >
>> >> >> > >> > File before being stripped using bpftool gen object:
>> >> >> > >> > /home/buildroot/buildroot/output/per-package/systemd/host/sbin/bpftool
>> >> >> > >> > btf dump file
>> >> >> > >> >
>> >> >
>> > output/build/systemd-custom/build/src/core/bpf/restrict_ifaces/restrict-ifaces.bpf.unstripped.o
>> >> >> > >> > format raw
>> >> >> > >> > [1] INT 'signed char' size=1 bits_offset=0 nr_bits=8 encoding=UNKN
>> >> >> > >> > [2] INT 'unsigned char' size=1 bits_offset=0 nr_bits=8 encoding=CHAR
>> >> >> > >> > [3] TYPEDEF '__u8' type_id=2
>> >> >> > >> > [4] CONST '(anon)' type_id=3
>> >> >> > >> > [5] VOLATILE '(anon)' type_id=4
>> >> >> > >> > [6] INT 'short int' size=2 bits_offset=0 nr_bits=16 encoding=SIGNED
>> >> >> > >> > [7] INT 'short unsigned int' size=2 bits_offset=0 nr_bits=16 encoding=(none)
>> >> >> > >> > [8] TYPEDEF '__u16' type_id=7
>> >> >> > >> > [9] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED
>> >> >> > >> > [10] TYPEDEF '__s32' type_id=9
>> >> >> > >> > [11] INT 'unsigned int' size=4 bits_offset=0 nr_bits=32 encoding=(none)
>> >> >> > >> > [12] TYPEDEF '__u32' type_id=11
>> >> >> > >> > [13] INT 'long long int' size=8 bits_offset=0 nr_bits=64 encoding=SIGNED
>> >> >> > >> > [14] INT 'long long unsigned int' size=8 bits_offset=0 nr_bits=64
>> >> >> > >> > encoding=(none)
>> >> >> > >> > [15] TYPEDEF '__u64' type_id=14
>> >> >> > >> > [16] INT 'long unsigned int' size=8 bits_offset=0 nr_bits=64 encoding=(none)
>> >> >> > >> > [17] INT 'long int' size=8 bits_offset=0 nr_bits=64 encoding=SIGNED
>> >> >> > >> > [18] INT 'char' size=1 bits_offset=0 nr_bits=8 encoding=UNKN
>> >> >> > >> > [19] CONST '(anon)' type_id=18
>> >> >> > >> > [20] TYPEDEF '__be16' type_id=8
>> >> >> > >> > [21] TYPEDEF '__be32' type_id=12
>> >> >> > >> > [22] ENUM 'bpf_map_type' encoding=UNSIGNED size=4 vlen=31
>> >> >> > >> >     'BPF_MAP_TYPE_UNSPEC' val=0
>> >> >> > >> >     'BPF_MAP_TYPE_HASH' val=1
>> >> >> > >> >     'BPF_MAP_TYPE_ARRAY' val=2
>> >> >> > >> >     'BPF_MAP_TYPE_PROG_ARRAY' val=3
>> >> >> > >> >     'BPF_MAP_TYPE_PERF_EVENT_ARRAY' val=4
>> >> >> > >> >     'BPF_MAP_TYPE_PERCPU_HASH' val=5
>> >> >> > >> >     'BPF_MAP_TYPE_PERCPU_ARRAY' val=6
>> >> >> > >> >     'BPF_MAP_TYPE_STACK_TRACE' val=7
>> >> >> > >> >     'BPF_MAP_TYPE_CGROUP_ARRAY' val=8
>> >> >> > >> >     'BPF_MAP_TYPE_LRU_HASH' val=9
>> >> >> > >> >     'BPF_MAP_TYPE_LRU_PERCPU_HASH' val=10
>> >> >> > >> >     'BPF_MAP_TYPE_LPM_TRIE' val=11
>> >> >> > >> >     'BPF_MAP_TYPE_ARRAY_OF_MAPS' val=12
>> >> >> > >> >     'BPF_MAP_TYPE_HASH_OF_MAPS' val=13
>> >> >> > >> >     'BPF_MAP_TYPE_DEVMAP' val=14
>> >> >> > >> >     'BPF_MAP_TYPE_SOCKMAP' val=15
>> >> >> > >> >     'BPF_MAP_TYPE_CPUMAP' val=16
>> >> >> > >> >     'BPF_MAP_TYPE_XSKMAP' val=17
>> >> >> > >> >     'BPF_MAP_TYPE_SOCKHASH' val=18
>> >> >> > >> >     'BPF_MAP_TYPE_CGROUP_STORAGE' val=19
>> >> >> > >> >     'BPF_MAP_TYPE_REUSEPORT_SOCKARRAY' val=20
>> >> >> > >> >     'BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE' val=21
>> >> >> > >> >     'BPF_MAP_TYPE_QUEUE' val=22
>> >> >> > >> >     'BPF_MAP_TYPE_STACK' val=23
>> >> >> > >> >     'BPF_MAP_TYPE_SK_STORAGE' val=24
>> >> >> > >> >     'BPF_MAP_TYPE_DEVMAP_HASH' val=25
>> >> >> > >> >     'BPF_MAP_TYPE_STRUCT_OPS' val=26
>> >> >> > >> >     'BPF_MAP_TYPE_RINGBUF' val=27
>> >> >> > >> >     'BPF_MAP_TYPE_INODE_STORAGE' val=28
>> >> >> > >> >     'BPF_MAP_TYPE_TASK_STORAGE' val=29
>> >> >> > >> >     'BPF_MAP_TYPE_BLOOM_FILTER' val=30
>> >> >> > >> > [23] UNION '(anon)' size=8 vlen=1
>> >> >> > >> >     'flow_keys' type_id=29 bits_offset=0
>> >> >> > >> > [24] STRUCT 'bpf_flow_keys' size=56 vlen=13
>> >> >> > >> >     'nhoff' type_id=8 bits_offset=0
>> >> >> > >> >     'thoff' type_id=8 bits_offset=16
>> >> >> > >> >     'addr_proto' type_id=8 bits_offset=32
>> >> >> > >> >     'is_frag' type_id=3 bits_offset=48
>> >> >> > >> >     'is_first_frag' type_id=3 bits_offset=56
>> >> >> > >> >     'is_encap' type_id=3 bits_offset=64
>> >> >> > >> >     'ip_proto' type_id=3 bits_offset=72
>> >> >> > >> >     'n_proto' type_id=20 bits_offset=80
>> >> >> > >> >     'sport' type_id=20 bits_offset=96
>> >> >> > >> >     'dport' type_id=20 bits_offset=112
>> >> >> > >> >     '(anon)' type_id=25 bits_offset=128
>> >> >> > >> >     'flags' type_id=12 bits_offset=384
>> >> >> > >> >     'flow_label' type_id=21 bits_offset=416
>> >> >> > >> > [25] UNION '(anon)' size=32 vlen=2
>> >> >> > >> >     '(anon)' type_id=26 bits_offset=0
>> >> >> > >> >     '(anon)' type_id=27 bits_offset=0
>> >> >> > >> > [26] STRUCT '(anon)' size=8 vlen=2
>> >> >> > >> >     'ipv4_src' type_id=21 bits_offset=0
>> >> >> > >> >     'ipv4_dst' type_id=21 bits_offset=32
>> >> >> > >> > [27] STRUCT '(anon)' size=32 vlen=2
>> >> >> > >> >     'ipv6_src' type_id=28 bits_offset=0
>> >> >> > >> >     'ipv6_dst' type_id=28 bits_offset=128
>> >> >> > >> > [28] ARRAY '(anon)' type_id=12 index_type_id=16 nr_elems=4
>> >> >> > >> > [29] PTR '(anon)' type_id=24
>> >> >> > >> > [30] UNION '(anon)' size=8 vlen=1
>> >> >> > >> >     'sk' type_id=32 bits_offset=0
>> >> >> > >> > [31] STRUCT 'bpf_sock' size=80 vlen=14
>> >> >> > >> >     'bound_dev_if' type_id=12 bits_offset=0
>> >> >> > >> >     'family' type_id=12 bits_offset=32
>> >> >> > >> >     'type' type_id=12 bits_offset=64
>> >> >> > >> >     'protocol' type_id=12 bits_offset=96
>> >> >> > >> >     'mark' type_id=12 bits_offset=128
>> >> >> > >> >     'priority' type_id=12 bits_offset=160
>> >> >> > >> >     'src_ip4' type_id=12 bits_offset=192
>> >> >> > >> >     'src_ip6' type_id=28 bits_offset=224
>> >> >> > >> >     'src_port' type_id=12 bits_offset=352
>> >> >> > >> >     'dst_port' type_id=20 bits_offset=384
>> >> >> > >> >     'dst_ip4' type_id=12 bits_offset=416
>> >> >> > >> >     'dst_ip6' type_id=28 bits_offset=448
>> >> >> > >> >     'state' type_id=12 bits_offset=576
>> >> >> > >> >     'rx_queue_mapping' type_id=10 bits_offset=608
>> >> >> > >> > [32] PTR '(anon)' type_id=31
>> >> >> > >> > [33] STRUCT '__sk_buff' size=192 vlen=33
>> >> >> > >> >     'len' type_id=12 bits_offset=0
>> >> >> > >> >     'pkt_type' type_id=12 bits_offset=32
>> >> >> > >> >     'mark' type_id=12 bits_offset=64
>> >> >> > >> >     'queue_mapping' type_id=12 bits_offset=96
>> >> >> > >> >     'protocol' type_id=12 bits_offset=128
>> >> >> > >> >     'vlan_present' type_id=12 bits_offset=160
>> >> >> > >> >     'vlan_tci' type_id=12 bits_offset=192
>> >> >> > >> >     'vlan_proto' type_id=12 bits_offset=224
>> >> >> > >> >     'priority' type_id=12 bits_offset=256
>> >> >> > >> >     'ingress_ifindex' type_id=12 bits_offset=288
>> >> >> > >> >     'ifindex' type_id=12 bits_offset=320
>> >> >> > >> >     'tc_index' type_id=12 bits_offset=352
>> >> >> > >> >     'cb' type_id=34 bits_offset=384
>> >> >> > >> >     'hash' type_id=12 bits_offset=544
>> >> >> > >> >     'tc_classid' type_id=12 bits_offset=576
>> >> >> > >> >     'data' type_id=12 bits_offset=608
>> >> >> > >> >     'data_end' type_id=12 bits_offset=640
>> >> >> > >> >     'napi_id' type_id=12 bits_offset=672
>> >> >> > >> >     'family' type_id=12 bits_offset=704
>> >> >> > >> >     'remote_ip4' type_id=12 bits_offset=736
>> >> >> > >> >     'local_ip4' type_id=12 bits_offset=768
>> >> >> > >> >     'remote_ip6' type_id=28 bits_offset=800
>> >> >> > >> >     'local_ip6' type_id=28 bits_offset=928
>> >> >> > >> >     'remote_port' type_id=12 bits_offset=1056
>> >> >> > >> >     'local_port' type_id=12 bits_offset=1088
>> >> >> > >> >     'data_meta' type_id=12 bits_offset=1120
>> >> >> > >> >     '(anon)' type_id=23 bits_offset=1152
>> >> >> > >> >     'tstamp' type_id=15 bits_offset=1216
>> >> >> > >> >     'wire_len' type_id=12 bits_offset=1280
>> >> >> > >> >     'gso_segs' type_id=12 bits_offset=1312
>> >> >> > >> >     '(anon)' type_id=30 bits_offset=1344
>> >> >> > >> >     'gso_size' type_id=12 bits_offset=1408
>> >> >> > >> >     'hwtstamp' type_id=15 bits_offset=1472
>> >> >> > >> > [34] ARRAY '(anon)' type_id=12 index_type_id=16 nr_elems=5
>> >> >> > >> > [35] CONST '(anon)' type_id=33
>> >> >> > >> > [36] PTR '(anon)' type_id=0
>> >> >> > >> > [37] STRUCT '(anon)' size=24 vlen=3
>> >> >> > >> >     'type' type_id=39 bits_offset=0
>> >> >> > >> >     'key' type_id=40 bits_offset=64
>> >> >> > >> >     'value' type_id=41 bits_offset=128
>> >> >> > >> > [38] ARRAY '(anon)' type_id=9 index_type_id=16 nr_elems=1
>> >> >> > >> > [39] PTR '(anon)' type_id=38
>> >> >> > >> > [40] PTR '(anon)' type_id=12
>> >> >> > >> > [41] PTR '(anon)' type_id=3
>> >> >> > >> > [42] ARRAY '(anon)' type_id=19 index_type_id=16 nr_elems=18
>> >> >> > >> > [43] CONST '(anon)' type_id=42
>> >> >> > >> > [44] FUNC_PROTO '(anon)' ret_type_id=36 vlen=2
>> >> >> > >> >     '(anon)' type_id=36
>> >> >> > >> >     '(anon)' type_id=46
>> >> >> > >> > [45] CONST '(anon)' type_id=0
>> >> >> > >> > [46] PTR '(anon)' type_id=45
>> >> >> > >> > [47] FUNC_PROTO '(anon)' ret_type_id=9 vlen=1
>> >> >> > >> >     'sk' type_id=48
>> >> >> > >> > [48] PTR '(anon)' type_id=35
>> >> >> > >> > [49] FUNC_PROTO '(anon)' ret_type_id=9 vlen=1
>> >> >> > >> >     'sk' type_id=48
>> >> >> > >> > [50] FUNC_PROTO '(anon)' ret_type_id=9 vlen=1
>> >> >> > >> >     'sk' type_id=48
>> >> >> > >> > [51] VAR '_license' type_id=43, linkage=static
>> >> >> > >> > [52] VAR 'is_allow_list' type_id=5, linkage=global
>> >> >> > >> > [53] VAR 'sd_restrictif' type_id=37, linkage=global
>> >> >> > >> > [54] FUNC 'bpf_map_lookup_elem' type_id=44 linkage=global
>> >> >> > >> > [55] FUNC 'sd_restrictif_i' type_id=47 linkage=global
>> >> >> > >> > [56] FUNC 'sd_restrictif_e' type_id=49 linkage=global
>> >> >> > >> > [57] FUNC 'restrict_network_interfaces_impl' type_id=50 linkage=static
>> >> >> > >> > [58] DATASEC 'license' size=0 vlen=1
>> >> >> > >> >     type_id=51 offset=0 size=18 (VAR '_license')
>> >> >> > >> > [59] DATASEC '.maps' size=0 vlen=1
>> >> >> > >> >     type_id=53 offset=0 size=24 (VAR 'sd_restrictif')
>> >> >> > >> > [60] DATASEC '.data' size=0 vlen=1
>> >> >> > >> >     type_id=52 offset=0 size=1 (VAR 'is_allow_list')
>> >> >> > >> >
>> >> >> > >> >>
>> >> >> > >> >> >> GCC is wrong, clearly. This function is global ([0]) and libbpf
>> >> >> > >> >> >> expects it to be marked as such in BTF.
>> >> >> > >> >> >>
>> >> >> > >> >> >>
>> >> >> > >> >
>> >> >
>> > https://github.com/systemd/systemd/blob/main/src/core/bpf/restrict_ifaces/restrict-ifaces.bpf.c#L42-L50
>> >> >> > >> >> >>
>> >> >> > >> >> >>
>> >> >> > >> >> >>> GCC:
>> >> >> > >> >> >>>
>> >> >> > >> >> >>> [1] INT 'signed char' size=1 bits_offset=0 nr_bits=8 encoding=UNKN
>> >> >> > >> >> >>> [2] INT 'unsigned char' size=1 bits_offset=0 nr_bits=8 encoding=CHAR
>> >> >> > >> >> >>> [3] TYPEDEF '__u8' type_id=2
>> >> >> > >> >> >>> [4] CONST '(anon)' type_id=3
>> >> >> > >> >> >>
>> >> >> > >> >> >> [...]