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c24941cd37
linux/tools/lib/bpf
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Kumar Kartikeya Dwivedi c24941cd37 libbpf: Add typeless ksym support to gen_loader 
This uses the bpf_kallsyms_lookup_name helper added in previous patches
to relocate typeless ksyms. The return value ENOENT can be ignored, and
the value written to 'res' can be directly stored to the insn, as it is
overwritten to 0 on lookup failure. For repeating symbols, we can simply
copy the previously populated bpf_insn.

Also, we need to take care to not close fds for typeless ksym_desc, so
reuse the 'off' member's space to add a marker for typeless ksym and use
that to skip them in cleanup_relos.

We add a emit_ksym_relo_log helper that avoids duplicating common
logging instructions between typeless and weak ksym (for future commit).

Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211028063501.2239335-3-memxor@gmail.com
2021-10-28 16:30:06 -07:00
..
.gitignore libbpf: Make libbpf_version.h non-auto-generated 2021-09-13 15:36:47 -07:00
bpf_core_read.h libbpf: Fix endianness detection in BPF_CORE_READ_BITFIELD_PROBED() 2021-10-25 20:39:41 -07:00
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: Add typeless ksym support to gen_loader 2021-10-28 16:30:06 -07:00
bpf_helpers.h libbpf: Use static const fmt string in __bpf_printk 2021-09-17 14:02:05 -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: Fail compilation if target arch is missing 2021-06-16 20:15:30 -07:00
bpf.c libbpf: Add "map_extra" as a per-map-type extra flag 2021-10-28 13:22:49 -07:00
bpf.h libbpf: Add bpf_cookie support to bpf_link_create() API 2021-08-17 00:45:08 +02:00
btf_dump.c libbpf: Use __BYTE_ORDER__ 2021-10-25 20:39:41 -07:00
btf.c libbpf: Use __BYTE_ORDER__ 2021-10-25 20:39:41 -07:00
btf.h libbpf: Add btf__type_cnt() and btf__raw_data() APIs 2021-10-22 16:09:14 -07:00
Build libbpf: Split CO-RE logic into relo_core.c. 2021-07-26 12:29:14 -07:00
gen_loader.c libbpf: Add typeless ksym support to gen_loader 2021-10-28 16:30:06 -07:00
hashmap.c libbpf: Centralize poisoning and poison reallocarray() 2020-08-18 18:38:25 -07:00
hashmap.h libbpf, hashmap: Fix undefined behavior in hash_bits 2020-11-02 23:33:51 +01:00
libbpf_common.h libbpf: Schedule open_opts.attach_prog_fd deprecation since v0.7 2021-09-17 09:05:41 -07:00
libbpf_errno.c libbpf: Streamline error reporting for high-level APIs 2021-05-25 17:32:35 -07:00
libbpf_internal.h libbpf: Add "map_extra" as a per-map-type extra flag 2021-10-28 13:22:49 -07:00
libbpf_legacy.h libbpf: Deprecate bpf_objects_list 2021-10-27 11:00:12 -07:00
libbpf_probes.c libbpf: Fix probe for BPF_PROG_TYPE_CGROUP_SOCKOPT 2021-08-07 01:38:52 +02:00
libbpf_version.h libbpf: Make libbpf_version.h non-auto-generated 2021-09-13 15:36:47 -07:00
libbpf.c libbpf: Add typeless ksym support to gen_loader 2021-10-28 16:30:06 -07:00
libbpf.h libbpf: Add "map_extra" as a per-map-type extra flag 2021-10-28 13:22:49 -07:00
libbpf.map libbpf: Add "map_extra" as a per-map-type extra flag 2021-10-28 13:22:49 -07:00
libbpf.pc.template libbpf: Add zlib as a dependency in pkg-config template 2019-12-16 14:55:29 -08:00
linker.c libbpf: Use __BYTE_ORDER__ 2021-10-25 20:39:41 -07:00
Makefile libbpf: Remove Makefile warnings on out-of-sync netlink.h/if_link.h 2021-10-19 16:33:10 -07:00
netlink.c libbpf: Switch to void * casting in netlink helpers 2021-06-22 17:04:02 +02:00
nlattr.c libbpf: Switch to void * casting in netlink helpers 2021-06-22 17:04:02 +02:00
nlattr.h libbpf: Switch to void * casting in netlink helpers 2021-06-22 17:04:02 +02:00
relo_core.c libbpf: Use __BYTE_ORDER__ 2021-10-25 20:39:41 -07:00
relo_core.h libbpf: Split CO-RE logic into relo_core.c. 2021-07-26 12:29:14 -07:00
ringbuf.c libbpf: Streamline error reporting for high-level APIs 2021-05-25 17:32:35 -07:00
skel_internal.h libbpf: Fix skel_internal.h to set errno on loader retval < 0 2021-09-29 20:42:32 -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: Extract internal set-of-strings datastructure APIs 2021-03-18 16:14:22 -07:00
strset.h libbpf: Extract internal set-of-strings datastructure APIs 2021-03-18 16:14:22 -07:00
xsk.c libbpf: Fix build with latest gcc/binutils with LTO 2021-09-07 19:32:04 -07:00
xsk.h libbpf: xsk: Move barriers from libbpf_util.h to xsk.h 2021-03-10 13:45:16 -08:00