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linux-next/kernel/bpf/disasm.h
Jiri Olsa abe0884011 bpf: Remove struct bpf_verifier_env argument from print_bpf_insn
We use print_bpf_insn in user space (bpftool and soon perf),
so it'd be nice to keep it generic and strip it off the kernel
struct bpf_verifier_env argument.

This argument can be safely removed, because its users can
use the struct bpf_insn_cbs::private_data to pass it.

By changing the argument type  we can no longer have clean
'verbose' alias to 'bpf_verifier_log_write' in verifier.c.
Instead  we're adding the  'verbose' cb_print callback and
removing the alias.

This way we have new cb_print callback in place, and all
the 'verbose(env, ...) calls in verifier.c will cleanly
cast to 'verbose(void *, ...)' so no other change is
needed.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-03-23 17:38:57 +01:00

49 lines
1.4 KiB
C

/* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com
* Copyright (c) 2016 Facebook
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#ifndef __BPF_DISASM_H__
#define __BPF_DISASM_H__
#include <linux/bpf.h>
#include <linux/kernel.h>
#include <linux/stringify.h>
#ifndef __KERNEL__
#include <stdio.h>
#include <string.h>
#endif
extern const char *const bpf_alu_string[16];
extern const char *const bpf_class_string[8];
const char *func_id_name(int id);
typedef __printf(2, 3) void (*bpf_insn_print_t)(void *private_data,
const char *, ...);
typedef const char *(*bpf_insn_revmap_call_t)(void *private_data,
const struct bpf_insn *insn);
typedef const char *(*bpf_insn_print_imm_t)(void *private_data,
const struct bpf_insn *insn,
__u64 full_imm);
struct bpf_insn_cbs {
bpf_insn_print_t cb_print;
bpf_insn_revmap_call_t cb_call;
bpf_insn_print_imm_t cb_imm;
void *private_data;
};
void print_bpf_insn(const struct bpf_insn_cbs *cbs,
const struct bpf_insn *insn,
bool allow_ptr_leaks);
#endif