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linux/tools/lib/bpf
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Andrii Nakryiko ef38a689f4 libbpf: never interpret subprogs in .text as entry programs 
[ Upstream commit db089c9158 ]

Libbpf pre-1.0 had a legacy logic of allowing singular non-annotated
(i.e., not having explicit SEC() annotation) function to be treated as
sole entry BPF program (unless there were other explicit entry
programs).

This behavior was dropped during libbpf 1.0 transition period (unless
LIBBPF_STRICT_SEC_NAME flag was unset in libbpf_mode). When 1.0 was
released and all the legacy behavior was removed, the bug slipped
through leaving this legacy behavior around.

Fix this for good, as it actually causes very confusing behavior if BPF
object file only has subprograms, but no entry programs.

Fixes: bd054102a8 ("libbpf: enforce strict libbpf 1.0 behaviors")
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20241010211731.4121837-1-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-12-09 10:32:03 +01:00
..
.gitignore libbpf: Make libbpf_version.h non-auto-generated 2021-09-13 15:36:47 -07:00
bpf.c libbpf: Add bpf_link_create support for multi uprobes 2023-08-21 15:51:26 -07:00
bpf.h libbpf: Add missing LIBBPF_API annotation to libbpf_set_memlock_rlim API 2024-03-26 18:19:24 -04:00
bpf_core_read.h bpf: Avoid uninitialized value in BPF_CORE_READ_BITFIELD 2024-07-11 12:49:09 +02:00
bpf_endian.h libbpf: Make bpf_endian co-exist with vmlinux.h 2020-07-01 09:06:12 +02:00
bpf_gen_internal.h libbpf: Support kfunc detection in light skeleton. 2023-03-22 09:31:05 -07:00
bpf_helpers.h libbpf: fix offsetof() and container_of() to work with CO-RE 2023-05-12 12:05:21 -07:00
bpf_prog_linfo.c libbpf: Streamline error reporting for high-level APIs 2021-05-25 17:32:35 -07:00
bpf_tracing.h libbpf: Fix syscall access arguments on riscv 2023-11-20 11:59:00 +01:00
btf.c libbpf: Ensure libbpf always opens files with O_CLOEXEC 2023-05-26 12:05:32 +02:00
btf.h libbpf: Don't require full struct enum64 in UAPI headers 2022-09-27 20:45:17 +02:00
btf_dump.c libbpf: Fix no-args func prototype BTF dumping syntax 2024-08-03 08:54:36 +02:00
Build libbpf: Move elf_find_func_offset* functions to elf object 2023-08-21 15:51:25 -07:00
elf.c libbpf: Add elf_resolve_pattern_offsets function 2023-08-21 15:51:26 -07:00
gen_loader.c libbpf: Store zero fd to fd_array for loader kfunc relocation 2023-05-16 22:09:23 -07:00
hashmap.c libbpf: Hashmap interface update to allow both long and void* keys/values 2022-11-09 20:45:14 -08:00
hashmap.h libbpf: Remove HASHMAP_INIT static initialization helper 2023-07-11 09:40:05 -07:00
libbpf.c libbpf: never interpret subprogs in .text as entry programs 2024-12-09 10:32:03 +01:00
libbpf.h libbpf: Add bpf_object__unpin() 2023-08-23 17:10:09 -07:00
libbpf.map libbpf: Add bpf_object__unpin() 2023-08-23 17:10:09 -07:00
libbpf.pc.template libbpf: Add zlib as a dependency in pkg-config template 2019-12-16 14:55:29 -08:00
libbpf_common.h libbpf: Fix potential uninitialized tail padding with LIBBPF_OPTS_RESET 2024-02-05 20:14:18 +00:00
libbpf_errno.c libbpf: Optimized return value in libbpf_strerror when errno is libbpf errno 2022-12-14 18:39:33 +01:00
libbpf_internal.h libbpf: Fix faccessat() usage on Android 2024-03-26 18:19:23 -04:00
libbpf_legacy.h libbpf: Clean up deprecated and legacy aliases 2022-08-17 22:42:56 +02:00
libbpf_probes.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-06-08 11:35:14 -07:00
libbpf_version.h libbpf: Start v1.3 development cycle 2023-05-23 21:39:12 +02:00
linker.c libbpf: Fix output .symtab byte-order during linking 2024-12-09 10:32:02 +01:00
Makefile libbpf: fix typos in Makefile 2023-08-02 13:58:51 -07:00
netlink.c libbpf: Use OPTS_SET() macro in bpf_xdp_query() 2024-03-26 18:19:26 -04:00
nlattr.c libbpf: Fix alen calculation in libbpf_nla_dump_errormsg() 2023-02-10 15:27:22 -08:00
nlattr.h libbpf: add API to get XDP/XSK supported features 2023-02-02 20:48:24 -08:00
relo_core.c libbpf: fix signedness determination in CO-RE relo handling logic 2023-08-23 21:13:48 -07:00
relo_core.h bpf, libbpf: Add type match support 2022-07-05 21:14:25 -07:00
ringbuf.c libbpf: Use bpf_{btf,link,map,prog}_get_info_by_fd() 2023-02-16 15:32:45 -08:00
skel_internal.h libbpf: add map_get_fd_by_id and map_delete_elem in light skeleton 2022-08-25 18:52:29 -07:00
str_error.c libbpf: Poison kernel-only integer types 2020-01-10 10:38:00 -08:00
str_error.h libbpf: relicense libbpf as LGPL-2.1 OR BSD-2-Clause 2018-10-08 10:09:48 +02:00
strset.c libbpf: Hashmap interface update to allow both long and void* keys/values 2022-11-09 20:45:14 -08:00
strset.h libbpf: Extract internal set-of-strings datastructure APIs 2021-03-18 16:14:22 -07:00
usdt.bpf.h libbpf: Use local includes inside the library 2023-08-04 15:06:46 -07:00
usdt.c libbpf: Add uprobe multi link support to bpf_program__attach_usdt 2023-08-21 15:51:26 -07:00
zip.c libbpf: Ignore warnings about "inefficient alignment" 2023-03-16 18:20:08 +01:00
zip.h libbpf: Implement basic zip archive parsing support 2023-03-01 16:05:34 -08:00