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/Linux-v5.15/tools/bpf/bpftool/Documentation/
Dbpftool-btf.rst5 tool for inspection of BTF data
20 BTF COMMANDS
35 Show information about loaded BTF objects. If a BTF ID is
36 specified, show information only about given BTF object,
37 otherwise list all BTF objects currently loaded on the
41 processes that hold open file descriptors (FDs) against BTF
46 Dump BTF entries from a given *BTF_SRC*.
48 When **id** is specified, BTF object with that ID will be
49 loaded and all its BTF types emitted.
52 associated BTF object with BTF types describing key and
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Dbpftool-gen.rst36 and instruction sections, .BTF and .BTF.ext (if present in
37 any of the input files) data are combined together. .BTF
40 BTF information.
Dbpftool-prog.rst239 helper to log each step of loading BTF, creating the maps,
/Linux-v5.15/Documentation/bpf/
Dbtf.rst2 BPF Type Format (BTF)
8 BTF (BPF Type Format) is the metadata format which encodes the debug info
9 related to BPF program/map. The name BTF was used initially to describe data
10 types. The BTF was later extended to include function info for defined
18 The BTF specification contains two parts,
19 * BTF kernel API
20 * BTF ELF file format
23 verifies the BTF info before using it. The ELF file format is a user space
26 The type and string sections are part of the BTF kernel API, describing the
32 2. BTF Type and String Encoding
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Dllvm_reloc.rst112 4 R_BPF_64_NODYLD32 .BTF[.ext] data 32 r_offset S + A
129 But ``R_BPF_64_NODYLD32`` specifically refers to relocations in ``.BTF`` and
130 ``.BTF.ext`` sections. For cases like bcc where llvm ``ExecutionEngine RuntimeDyld``
132 to actual function/variable address. Otherwise, ``.BTF`` and ``.BTF.ext``
231 The .BTF/.BTF.ext sections has R_BPF_64_NODYLD32 relocations::
233 Relocation section '.rel.BTF' at offset 0x538 contains 1 entries:
237 Relocation section '.rel.BTF.ext' at offset 0x548 contains 2 entries:
Dindex.rst20 BPF Type Format (BTF)
Ddrgn.rst35 List BPF programs (full names are obtained from BTF)::
71 that has BTF id 16 in BPF program id 650, name ``test_pkt_access``.
Dbpf_lsm.rst43 This can be further simplified (if one has access to the BTF information at
/Linux-v5.15/Documentation/ABI/testing/
Dsysfs-kernel-btf6 Contains BTF type information and related data for kernel and
14 Read-only binary attribute exposing kernel's own BTF type
24 Read-only binary attribute exposing kernel module's BTF type
25 information as an add-on to the kernel's BTF (/sys/kernel/btf/vmlinux).
/Linux-v5.15/Documentation/admin-guide/media/
Dtuner-cardlist.rst92 84 Sony BTF-Pxn01Z
97 89 Sony BTF-PG472Z PAL/SECAM
98 90 Sony BTF-PK467Z NTSC-M-JP
99 91 Sony BTF-PB463Z NTSC-M
Di2c-cardlist.rst32 sony-btf-mpx Sony BTF's internal MPX
/Linux-v5.15/include/asm-generic/
Dvmlinux.lds.h540 BTF \
668 #define BTF \ macro
669 .BTF : AT(ADDR(.BTF) - LOAD_OFFSET) { \
671 KEEP(*(.BTF)) \
679 #define BTF macro
/Linux-v5.15/tools/testing/selftests/bpf/
DREADME.rst186 either crash when compiling these tests, or generate an incorrect BTF.
194 to generate extern function in BTF. It was introduced in `Clang 13`__.
200 libbpf: failed to find BTF for extern 'tcp_slow_start' [25] section: -2
208 generate valid BTF information for weak variables. Please make sure you use
/Linux-v5.15/scripts/
Dlink-vmlinux.sh239 ${OBJCOPY} --only-section=.BTF --set-section-flags .BTF=alloc,readonly \
DMakefile.modfinal40 quiet_cmd_btf_ko = BTF [M] $@
/Linux-v5.15/Documentation/bpf/libbpf/
Dlibbpf_naming_convention.rst52 All objects and corresponding functions other than BTF related should go
53 to ``libbpf.h``. BTF types and functions should go to ``btf.h``.
/Linux-v5.15/samples/bpf/
DMakefile245 BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF)
249 readelf -S ./llvm_btf_verify.o | grep BTF; \
/Linux-v5.15/tools/perf/Documentation/
Dperf.data-file-format.txt354 Contains BPF Type Format (BTF). For more information about BTF, please
Dperf-trace.txt240 by default and use BTF when available, as well as use functions to do pretty
/Linux-v5.15/drivers/media/i2c/
DKconfig187 tristate "Sony BTF's internal MPX"
190 Support for the internal MPX of the Sony BTF-PG472Z tuner.
/Linux-v5.15/lib/
DKconfig.debug316 bool "Generate BTF typeinfo"
320 Generate deduplicated BTF type information from DWARF debug info.
322 DWARF type info into equivalent deduplicated BTF type info.
331 Generate compact split BTF type information for kernel modules.