Andrii Nakryiko a4b09a9ef9 libbpf: Add non-CO-RE variants of BPF_CORE_READ() macro family ... BPF_CORE_READ(), in addition to handling CO-RE relocations, also allows much nicer way to read data structures with nested pointers. Instead of writing a sequence of bpf_probe_read() calls to follow links, one can just write BPF_CORE_READ(a, b, c, d) to effectively do a->b->c->d read. This is a welcome ability when porting BCC code, which (in most cases) allows exactly the intuitive a->b->c->d variant. This patch adds non-CO-RE variants of BPF_CORE_READ() family of macros for cases where CO-RE is not supported (e.g., old kernels). In such cases, the property of shortening a sequence of bpf_probe_read()s to a simple BPF_PROBE_READ(a, b, c, d) invocation is still desirable, especially when porting BCC code to libbpf. Yet, no CO-RE relocation is going to be emitted. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20201218235614.2284956-3-andrii@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>		2021-01-08 13:39:24 -08:00
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api	libperf: Avoid counting of nonfilterable fdarray fds	2020-07-21 09:53:22 -03:00
bpf	libbpf: Add non-CO-RE variants of BPF_CORE_READ() macro family	2021-01-08 13:39:24 -08:00
lockdep	.gitignore: add SPDX License Identifier	2020-03-25 11:50:48 +01:00
perf	perf tools: Add size to 'struct perf_record_header_build_id'	2020-10-14 11:28:12 -03:00
subcmd	tools: Avoid comma separated statements	2020-10-02 10:36:36 -06:00
symbol	libsymbols kallsyms: Move hex2u64 out of header	2020-05-05 16:35:32 -03:00
traceevent	tools lib traceevent: Hide non API functions	2020-10-13 11:47:38 -03:00
argv_split.c
bitmap.c
ctype.c
find_bit.c
hweight.c
rbtree.c	tools/: replace HTTP links with HTTPS ones	2020-08-07 11:33:21 -07:00
str_error_r.c
string.c	tools lib: Adopt memchr_inv() from kernel	2020-11-27 08:34:52 -03:00
vsprintf.c
zalloc.c