Viktor Malik e4c4a02130 tools/resolve_btfids: Fix cross-compilation to non-host endianness ... [ Upstream commit 903fad4394 ] The .BTF_ids section is pre-filled with zeroed BTF ID entries during the build and afterwards patched by resolve_btfids with correct values. Since resolve_btfids always writes in host-native endianness, it relies on libelf to do the translation when the target ELF is cross-compiled to a different endianness (this was introduced in commit 61e8aeda93 ("bpf: Fix libelf endian handling in resolv_btfids")). Unfortunately, the translation will corrupt the flags fields of SET8 entries because these were written during vmlinux compilation and are in the correct endianness already. This will lead to numerous selftests failures such as: $ sudo ./test_verifier 502 502 #502/p sleepable fentry accept FAIL Failed to load prog 'Invalid argument'! bpf_fentry_test1 is not sleepable verification time 34 usec stack depth 0 processed 0 insns (limit 1000000) max_states_per_insn 0 total_states 0 peak_states 0 mark_read 0 Summary: 0 PASSED, 0 SKIPPED, 1 FAILED Since it's not possible to instruct libelf to translate just certain values, let's manually bswap the flags (both global and entry flags) in resolve_btfids when needed, so that libelf then translates everything correctly. Fixes: ef2c6f370a ("tools/resolve_btfids: Add support for 8-byte BTF sets") Signed-off-by: Viktor Malik <vmalik@redhat.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/7b6bff690919555574ce0f13d2a5996cacf7bf69.1707223196.git.vmalik@redhat.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-03-26 18:19:27 -04:00
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bpftool	bpftool: Silence build warning about calloc()	2024-03-26 18:19:22 -04:00
resolve_btfids	tools/resolve_btfids: Fix cross-compilation to non-host endianness	2024-03-26 18:19:27 -04:00
runqslower	bpf: Replace deprecated -target with --target= for Clang	2023-06-29 15:46:17 +02:00
.gitignore	.gitignore: add SPDX License Identifier	2020-03-25 11:50:48 +01:00
Makefile	tools bpf_jit_disasm: Don't display disassembler-four-args feature test	2022-08-01 15:31:51 -03:00
bpf_asm.c	docs: networking: convert filter.txt to ReST	2020-04-28 14:39:46 -07:00
bpf_dbg.c	bpf: Simplify the calculation of variables	2021-03-04 19:24:53 -08:00
bpf_exp.l	bpf: fix cbpf parser bug for octal numbers	2018-06-03 07:46:55 -07:00
bpf_exp.y	tools, bpf_asm: Exit non-zero on errors	2021-02-26 22:53:50 +01:00
bpf_jit_disasm.c	tools bpf_jit_disasm: Fix compilation error with new binutils	2022-08-01 15:30:48 -03:00