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// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2019 Facebook
#include <linux/bpf.h>
#include <stdint.h>
#include "bpf_helpers.h"
char _license[] SEC("license") = "GPL";
static volatile struct data {
char in[256];
char out[256];
} data;
struct core_reloc_flavors {
int a;
int b;
int c;
};
/* local flavor with reversed layout */
struct core_reloc_flavors___reversed {
int c;
int b;
int a;
};
/* local flavor with nested/overlapping layout */
struct core_reloc_flavors___weird {
struct {
int b;
};
/* a and c overlap in local flavor, but this should still work
* correctly with target original flavor
*/
union {
int a;
int c;
};
};
SEC("raw_tracepoint/sys_enter")
int test_core_flavors(void *ctx)
{
struct core_reloc_flavors *in_orig = (void *)&data.in;
struct core_reloc_flavors___reversed *in_rev = (void *)&data.in;
struct core_reloc_flavors___weird *in_weird = (void *)&data.in;
struct core_reloc_flavors *out = (void *)&data.out;
/* read a using weird layout */
if (BPF_CORE_READ(&out->a, &in_weird->a))
return 1;
/* read b using reversed layout */
if (BPF_CORE_READ(&out->b, &in_rev->b))
return 1;
/* read c using original layout */
if (BPF_CORE_READ(&out->c, &in_orig->c))
return 1;
return 0;
}
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