Ard Biesheuvel fc5eb4a84e btf: Avoid weak external references ... If the BTF code is enabled in the build configuration, the start/stop BTF markers are guaranteed to exist. Only when CONFIG_DEBUG_INFO_BTF=n, the references in btf_parse_vmlinux() will remain unsatisfied, relying on the weak linkage of the external references to avoid breaking the build. Avoid GOT based relocations to these markers in the final executable by dropping the weak attribute and instead, make btf_parse_vmlinux() return ERR_PTR(-ENOENT) directly if CONFIG_DEBUG_INFO_BTF is not enabled to begin with. The compiler will drop any subsequent references to __start_BTF and __stop_BTF in that case, allowing the link to succeed. Note that Clang will notice that taking the address of __start_BTF can no longer yield NULL, so testing for that condition becomes unnecessary. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Jiri Olsa <jolsa@kernel.org> Link: https://lore.kernel.org/bpf/20240415162041.2491523-8-ardb+git@google.com		2024-04-16 16:35:13 +02:00
..
preload	bpf: make preloaded map iterators to display map elements count	2023-07-06 12:42:25 -07:00
arena.c	bpf,arena: Use helper sizeof_field in struct accessors	2024-03-28 18:31:36 -07:00
arraymap.c	bpf: inline bpf_map_lookup_elem() for PERCPU_ARRAY maps	2024-04-03 10:29:56 -07:00
bloom_filter.c	bpf: Check bloom filter map value size	2024-03-27 09:56:17 -07:00
bpf_cgrp_storage.c	bpf: Enable bpf_cgrp_storage for cgroup1 non-attach case	2023-12-08 17:08:18 -08:00
bpf_inode_storage.c	Networking changes for 6.4.	2023-04-26 16:07:23 -07:00
bpf_iter.c	bpf: move sleepable flag from bpf_prog_aux to bpf_prog	2024-03-11 16:41:25 -07:00
bpf_local_storage.c	bpf: Allow compiler to inline most of bpf_local_storage_lookup()	2024-02-11 14:06:24 -08:00
bpf_lru_list.c	bpf: Address KCSAN report on bpf_lru_list	2023-05-12 12:01:03 -07:00
bpf_lru_list.h	bpf: lru: Remove unused declaration bpf_lru_promote()	2023-08-08 17:21:42 -07:00
bpf_lsm.c	bpf: Minor clean-up to sleepable_lsm_hooks BTF set	2024-02-01 18:37:45 +01:00
bpf_struct_ops.c	bpf: Check return from set_memory_rox()	2024-03-18 14:18:47 -07:00
bpf_task_storage.c	bpf: Teach verifier that certain helpers accept NULL pointer.	2023-04-04 16:57:16 -07:00
btf.c	btf: Avoid weak external references	2024-04-16 16:35:13 +02:00
cgroup_iter.c	bpf: Let verifier consider {task,cgroup} is trusted in bpf_iter_reg	2023-11-07 15:24:25 -08:00
cgroup.c	bpf: Allow helper bpf_get_[ns_]current_pid_tgid() for all prog types	2024-03-19 14:24:07 -07:00
core.c	bpf: Add support for certain atomics in bpf_arena to x86 JIT	2024-04-09 10:24:26 -07:00
cpumap.c	bpf: report RCU QS in cpumap kthread	2024-03-20 21:05:43 -07:00
cpumask.c	bpf: Allow invoking kfuncs from BPF_PROG_TYPE_SYSCALL progs	2024-04-05 10:56:09 -07:00
devmap.c	bpf: Fix DEVMAP_HASH overflow check on 32-bit arches	2024-03-07 20:02:38 -08:00
disasm.c	bpf: add special internal-only MOV instruction to resolve per-CPU addrs	2024-04-03 10:29:55 -07:00
disasm.h
dispatcher.c	bpf: Use arch_bpf_trampoline_size	2023-12-06 17:17:20 -08:00
hashtab.c	bpf: inline bpf_map_lookup_elem() helper for PERCPU_HASH map	2024-04-03 10:29:56 -07:00
helpers.c	bpf: Allow invoking kfuncs from BPF_PROG_TYPE_SYSCALL progs	2024-04-05 10:56:09 -07:00
inode.c	bpf: Support symbolic BPF FS delegation mount options	2024-01-24 16:21:02 -08:00
Kconfig	bpf: Merge two CONFIG_BPF entries	2024-02-07 16:38:20 -08:00
link_iter.c	bpf: Add bpf_link iterator	2022-05-10 11:20:45 -07:00
local_storage.c	cgroup changes for v6.4-rc1	2023-04-29 10:05:22 -07:00
log.c	bpf: Replace deprecated strncpy with strscpy	2024-04-03 16:57:41 +02:00
lpm_trie.c	bpf: Avoid kfree_rcu() under lock in bpf_lpm_trie.	2024-03-29 11:10:41 -07:00
Makefile	bpf: Introduce bpf_arena.	2024-03-11 15:37:23 -07:00
map_in_map.c	bpf: Optimize the free of inner map	2023-12-04 17:50:26 -08:00
map_in_map.h	bpf: Add map and need_defer parameters to .map_fd_put_ptr()	2023-12-04 17:50:26 -08:00
map_iter.c	bpf: treewide: Annotate BPF kfuncs in BTF	2024-01-31 20:40:56 -08:00
memalloc.c	bpf: Remove unnecessary cpu == 0 check in memalloc	2024-01-04 10:18:14 -08:00
mmap_unlock_work.h	bpf: Introduce helper bpf_find_vma	2021-11-07 11:54:51 -08:00
mprog.c	bpf: Handle bpf_mprog_query with NULL entry	2023-10-06 17:11:20 -07:00
net_namespace.c	net: Add includes masked by netdevice.h including uapi/bpf.h	2021-12-29 20:03:05 -08:00
offload.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2023-09-21 21:49:45 +02:00
percpu_freelist.c	bpf: Initialize same number of free nodes for each pcpu_freelist	2022-11-11 12:05:14 -08:00
percpu_freelist.h
prog_iter.c
queue_stack_maps.c	bpf: Avoid deadlock when using queue and stack maps from NMI	2023-09-11 19:04:49 -07:00
reuseport_array.c	bpf: Centralize permissions checks for all BPF map types	2023-06-19 14:04:04 +02:00
ringbuf.c	bpf: Fold smp_mb__before_atomic() into atomic_set_release()	2023-10-24 14:26:07 +02:00
stackmap.c	bpf: Fix stackmap overflow check on 32-bit arches	2024-03-07 20:06:25 -08:00
syscall.c	bpf: Add bpf_link support for sk_msg and sk_skb progs	2024-04-10 19:52:25 -07:00
sysfs_btf.c	btf: Avoid weak external references	2024-04-16 16:35:13 +02:00
task_iter.c	bpf: Fix an issue due to uninitialized bpf_iter_task	2024-02-19 12:28:15 +01:00
tcx.c	bpf, tcx: Get rid of tcx_link_const	2023-10-23 15:01:53 -07:00
tnum.c	bpf: simplify tnum output if a fully known constant	2023-12-02 11:36:51 -08:00
token.c	bpf,token: Use BIT_ULL() to convert the bit mask	2024-01-29 20:04:55 -08:00
trampoline.c	bpf: Improve program stats run-time calculation	2024-04-02 16:51:15 +02:00
verifier.c	bpf: Add support for certain atomics in bpf_arena to x86 JIT	2024-04-09 10:24:26 -07:00