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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */
#include <vmlinux.h>
#include <bpf/bpf_tracing.h>
#include "bpf_misc.h"
#include "../bpf_testmod/bpf_testmod.h"
#include "../bpf_testmod/bpf_testmod_kfunc.h"
char _license[] SEC("license") = "GPL";
static __noinline __used int subprog(struct st_ops_args *args)
{
args->a += 1;
return args->a;
}
SEC("struct_ops/test_epilogue_subprog")
int BPF_PROG(test_epilogue_subprog, struct st_ops_args *args)
{
subprog(args);
return args->a;
}
struct {
__uint(type, BPF_MAP_TYPE_PROG_ARRAY);
__uint(max_entries, 1);
__uint(key_size, sizeof(__u32));
__uint(value_size, sizeof(__u32));
__array(values, void (void));
} epilogue_map SEC(".maps") = {
.values = {
[0] = (void *)&test_epilogue_subprog,
}
};
SEC("struct_ops/test_epilogue_tailcall")
int test_epilogue_tailcall(unsigned long long *ctx)
{
bpf_tail_call(ctx, &epilogue_map, 0);
return 0;
}
SEC(".struct_ops.link")
struct bpf_testmod_st_ops epilogue_tailcall = {
.test_epilogue = (void *)test_epilogue_tailcall,
};
SEC(".struct_ops.link")
struct bpf_testmod_st_ops epilogue_subprog = {
.test_epilogue = (void *)test_epilogue_subprog,
};
SEC("syscall")
int syscall_epilogue_tailcall(struct st_ops_args *args)
{
return bpf_kfunc_st_ops_test_epilogue(args);
}
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