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| author | Alexei Starovoitov <ast@fb.com> | 2017-12-14 17:55:10 -0800 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2017-12-17 20:34:35 +0100 |
| commit | 48cca7e44f9f8268fdcd4351e2f19ff2275119d1 (patch) | |
| tree | 2900d4f0541a70a9b734bcea775e310ceea068ae /tools/lib/bpf/bpf.h | |
| parent | d98588cef04529aa326c6cbc0cfa01a3a3e00ef5 (diff) | |
| download | lwn-48cca7e44f9f8268fdcd4351e2f19ff2275119d1.tar.gz lwn-48cca7e44f9f8268fdcd4351e2f19ff2275119d1.zip | |
libbpf: add support for bpf_call
- recognize relocation emitted by llvm
- since all regular function will be kept in .text section and llvm
takes care of pc-relative offsets in bpf_call instruction
simply copy all of .text to relevant program section while adjusting
bpf_call instructions in program section to point to newly copied
body of instructions from .text
- do so for all programs in the elf file
- set all programs types to the one passed to bpf_prog_load()
Note for elf files with multiple programs that use different
functions in .text section we need to do 'linker' style logic.
This work is still TBD
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'tools/lib/bpf/bpf.h')
| -rw-r--r-- | tools/lib/bpf/bpf.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index 6534889e2b2f..9f44c196931e 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -40,7 +40,7 @@ int bpf_create_map_in_map(enum bpf_map_type map_type, const char *name, __u32 map_flags); /* Recommend log buffer size */ -#define BPF_LOG_BUF_SIZE 65536 +#define BPF_LOG_BUF_SIZE (256 * 1024) int bpf_load_program_name(enum bpf_prog_type type, const char *name, const struct bpf_insn *insns, size_t insns_cnt, const char *license, |