Ivan Babrou f3c9773d9c bpftool: Un-const bpf_func_info to fix it for llvm 17 and newer ... [ Upstream commit f4aba3471cfb9ccf69b476463f19b4c50fef6b14 ] LLVM 17 started treating const structs as constants: * 0b2d5b967d Combined with pointer laundering via ptr_to_u64, which takes a const ptr, but in reality treats the underlying memory as mutable, this makes clang always pass zero to btf__type_by_id, which breaks full name resolution. Disassembly before (LLVM 16) and after (LLVM 17): - 8b 75 cc mov -0x34(%rbp),%esi - e8 47 8d 02 00 call 3f5b0 <btf__type_by_id> + 31 f6 xor %esi,%esi + e8 a9 8c 02 00 call 3f510 <btf__type_by_id> It's a bigger project to fix this properly (and a question whether LLVM itself should detect this), but for right now let's just fix bpftool. For more information, see this thread in bpf mailing list: * https://lore.kernel.org/bpf/CABWYdi0ymezpYsQsPv7qzpx2fWuTkoD1-wG1eT-9x-TSREFrQg@mail.gmail.com/T/ Fixes: b662000aff ("bpftool: Adding support for BTF program names") Signed-off-by: Ivan Babrou <ivan@cloudflare.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Nick Desaulniers <ndesaulniers@google.com> Acked-by: Yonghong Song <yonghong.song@linux.dev> Link: https://lore.kernel.org/bpf/20240520225149.5517-1-ivan@cloudflare.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-08-03 08:53:36 +02:00
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bpftool	bpftool: Un-const bpf_func_info to fix it for llvm 17 and newer	2024-08-03 08:53:36 +02:00
resolve_btfids	bpf: Fix potential integer overflow in resolve_btfids	2024-06-12 11:12:54 +02:00
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
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
Makefile	tools bpf_jit_disasm: Don't display disassembler-four-args feature test	2022-08-01 15:31:51 -03:00