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| author | Martin KaFai Lau <kafai@fb.com> | 2019-11-23 23:25:04 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2019-11-25 04:12:11 +0300 |
| commit | f9a7cf6eb17cd0110c8c47d9e7969fc2716e5772 (patch) | |
| tree | 9db74c8c6aaa198f2d163d066abe228f24bb22d5 /tools/lib | |
| parent | b8cd76ca4ae34731d47cd6a876d912a08efcc240 (diff) | |
| download | linux-f9a7cf6eb17cd0110c8c47d9e7969fc2716e5772.tar.xz | |
bpf: Introduce BPF_TRACE_x helper for the tracing tests
For BPF_PROG_TYPE_TRACING, the bpf_prog's ctx is an array of u64.
This patch borrows the idea from BPF_CALL_x in filter.h to
convert a u64 to the arg type of the traced function.
The new BPF_TRACE_x has an arg to specify the return type of a bpf_prog.
It will be used in the future TCP-ops bpf_prog that may return "void".
The new macros are defined in the new header file "bpf_trace_helpers.h".
It is under selftests/bpf/ for now. It could be moved to libbpf later
after seeing more upcoming non-tracing use cases.
The tests are changed to use these new macros also. Hence,
the k[s]u8/16/32/64 are no longer needed and they are removed
from the bpf_helpers.h.
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20191123202504.1502696-1-kafai@fb.com
Diffstat (limited to 'tools/lib')
| -rw-r--r-- | tools/lib/bpf/bpf_helpers.h | 13 |
1 files changed, 0 insertions, 13 deletions
diff --git a/tools/lib/bpf/bpf_helpers.h b/tools/lib/bpf/bpf_helpers.h index c63ab1add126..0c7d28292898 100644 --- a/tools/lib/bpf/bpf_helpers.h +++ b/tools/lib/bpf/bpf_helpers.h @@ -44,17 +44,4 @@ enum libbpf_pin_type { LIBBPF_PIN_BY_NAME, }; -/* The following types should be used by BPF_PROG_TYPE_TRACING program to - * access kernel function arguments. BPF trampoline and raw tracepoints - * typecast arguments to 'unsigned long long'. - */ -typedef int __attribute__((aligned(8))) ks32; -typedef char __attribute__((aligned(8))) ks8; -typedef short __attribute__((aligned(8))) ks16; -typedef long long __attribute__((aligned(8))) ks64; -typedef unsigned int __attribute__((aligned(8))) ku32; -typedef unsigned char __attribute__((aligned(8))) ku8; -typedef unsigned short __attribute__((aligned(8))) ku16; -typedef unsigned long long __attribute__((aligned(8))) ku64; - #endif |