// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
/* Copyright (c) 2019 Facebook */
#ifdef __KERNEL__
#include <linux/bpf.h>
#include <linux/btf.h>
#include <linux/string.h>
#include <linux/bpf_verifier.h>
#include "relo_core.h"
static const char *btf_kind_str(const struct btf_type *t)
{
return btf_type_str(t);
}
static bool is_ldimm64_insn(struct bpf_insn *insn)
{
return insn->code == (BPF_LD | BPF_IMM | BPF_DW);
}
static const struct btf_type *
skip_mods_and_typedefs(const struct btf *btf, u32 id, u32 *res_id)
{
return btf_type_skip_modifiers(btf, id, res_id);
}
static const char *btf__name_by_offset(const struct btf *btf, u32 offset)
{
return btf_name_by_offset(btf, offset);
}
static s64 btf__resolve_size(const struct btf *btf, u32 type_id)
{
const struct btf_type *t;
int size;
t = btf_type_by_id(btf, type_id);
t = btf_resolve_size(btf, t, &size);
if (IS_ERR(t))
return PTR_ERR(t);
return size;
}
enum libbpf_print_level {
LIBBPF_WARN,
LIBBPF_INFO,
LIBBPF_DEBUG,
};
#undef pr_warn
#undef pr_info
#undef pr_debug
#define pr_warn(fmt, log, ...) bpf_log((void *)log, fmt, "", ##__VA_ARGS__)
#define pr_info(fmt, log, ...) bpf_log((void *)log, fmt, "", ##__VA_ARGS__)
#define pr_debug(fmt, log, ...) bpf_log((void *)log, fmt, "", ##__VA_ARGS__)
#define libbpf_print(level, fmt, ...) bpf_log((void *)prog_name, fmt, ##__VA_ARGS__)
#else
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include <linux/err.h>
#include "libbpf.h"
#include "bpf.h"
#include "btf.h"
#include "str_error.h"
#include "libbpf_internal.h"
#endif
static bool is_flex_arr(const struct btf *btf,
const struct bpf_core_accessor *acc,
const struct btf_array *arr)
{
const struct btf_type *t;
/* not a flexible array, if not inside a struct or has non-zero size */
if (!acc->name || arr->nelems > 0)
return false;
/* has to be the last member of enclosing struct */
t = btf_type_by_id(btf, acc->type_id);
return acc->idx == btf_vlen(t) - 1;
}
static const char *core_relo_kind_str(enum bpf_core_relo_kind kind)
{
switch (kind) {
case BPF_CORE_FIELD_BYTE_OFFSET: return "byte_off";
case BPF_CORE_FIELD_BYTE_SIZE: return "byte_sz";
case BPF_CORE_FIELD_EXISTS: return "field_exists";
case BPF_CORE_FIELD_SIGNED: return "signed";
