28 lines
672 B
C
28 lines
672 B
C
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// SPDX-License-Identifier: GPL-2.0
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#include <linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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struct __bpf_stdout__ {
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__uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY);
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__type(key, int);
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__type(value, __u32);
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__uint(max_entries, __NR_CPUS__);
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} __bpf_stdout__ SEC(".maps");
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#define puts(from) \
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({ const int __len = sizeof(from); \
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char __from[sizeof(from)] = from; \
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bpf_perf_event_output(args, &__bpf_stdout__, BPF_F_CURRENT_CPU, \
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&__from, __len & (sizeof(from) - 1)); })
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struct syscall_enter_args;
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SEC("raw_syscalls:sys_enter")
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int sys_enter(struct syscall_enter_args *args)
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{
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puts("Hello, world\n");
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return 0;
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}
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char _license[] SEC("license") = "GPL";
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