diff options
author | Andrii Nakryiko <andriin@fb.com> | 2019-10-08 10:59:40 -0700 |
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committer | Daniel Borkmann <daniel@iogearbox.net> | 2019-10-08 23:16:03 +0200 |
commit | e01a75c159691714607b8a22daa2ba7be275dd01 (patch) | |
tree | 364a23b2a6384b037cce99f04ae84efa9a533271 /tools/testing/selftests/bpf/bpf_helpers.h | |
parent | selftests/bpf: Split off tracing-only helpers into bpf_tracing.h (diff) | |
download | linux-dev-e01a75c159691714607b8a22daa2ba7be275dd01.tar.xz linux-dev-e01a75c159691714607b8a22daa2ba7be275dd01.zip |
libbpf: Move bpf_{helpers, helper_defs, endian, tracing}.h into libbpf
Move bpf_helpers.h, bpf_tracing.h, and bpf_endian.h into libbpf. Move
bpf_helper_defs.h generation into libbpf's Makefile. Ensure all those
headers are installed along the other libbpf headers. Also, adjust
selftests and samples include path to include libbpf now.
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20191008175942.1769476-6-andriin@fb.com
Diffstat (limited to 'tools/testing/selftests/bpf/bpf_helpers.h')
-rw-r--r-- | tools/testing/selftests/bpf/bpf_helpers.h | 55 |
1 files changed, 0 insertions, 55 deletions
diff --git a/tools/testing/selftests/bpf/bpf_helpers.h b/tools/testing/selftests/bpf/bpf_helpers.h deleted file mode 100644 index 6d059c0a7845..000000000000 --- a/tools/testing/selftests/bpf/bpf_helpers.h +++ /dev/null @@ -1,55 +0,0 @@ -/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */ -#ifndef __BPF_HELPERS__ -#define __BPF_HELPERS__ - -#include "bpf_helper_defs.h" - -#define __uint(name, val) int (*name)[val] -#define __type(name, val) typeof(val) *name - -/* helper macro to print out debug messages */ -#define bpf_printk(fmt, ...) \ -({ \ - char ____fmt[] = fmt; \ - bpf_trace_printk(____fmt, sizeof(____fmt), \ - ##__VA_ARGS__); \ -}) - -/* helper macro to place programs, maps, license in - * different sections in elf_bpf file. Section names - * are interpreted by elf_bpf loader - */ -#define SEC(NAME) __attribute__((section(NAME), used)) - -/* a helper structure used by eBPF C program - * to describe BPF map attributes to libbpf loader - */ -struct bpf_map_def { - unsigned int type; - unsigned int key_size; - unsigned int value_size; - unsigned int max_entries; - unsigned int map_flags; -}; - -/* - * bpf_core_read() abstracts away bpf_probe_read() call and captures offset - * relocation for source address using __builtin_preserve_access_index() - * built-in, provided by Clang. - * - * __builtin_preserve_access_index() takes as an argument an expression of - * taking an address of a field within struct/union. It makes compiler emit - * a relocation, which records BTF type ID describing root struct/union and an - * accessor string which describes exact embedded field that was used to take - * an address. See detailed description of this relocation format and - * semantics in comments to struct bpf_offset_reloc in libbpf_internal.h. - * - * This relocation allows libbpf to adjust BPF instruction to use correct - * actual field offset, based on target kernel BTF type that matches original - * (local) BTF, used to record relocation. - */ -#define bpf_core_read(dst, sz, src) \ - bpf_probe_read(dst, sz, \ - (const void *)__builtin_preserve_access_index(src)) - -#endif |