37 lines
828 B
C
37 lines
828 B
C
// SPDX-License-Identifier: GPL-2.0
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#include "vmlinux.h"
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_tracing.h>
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#define PT_REGS_SIZE sizeof(struct pt_regs)
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/*
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* The kernel struct pt_regs isn't exported in its entirety to userspace.
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* Pass it as an array to task_pt_regs.c
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*/
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char current_regs[PT_REGS_SIZE] = {};
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char ctx_regs[PT_REGS_SIZE] = {};
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int uprobe_res = 0;
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SEC("uprobe")
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int handle_uprobe(struct pt_regs *ctx)
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{
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struct task_struct *current;
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struct pt_regs *regs;
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current = bpf_get_current_task_btf();
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regs = (struct pt_regs *) bpf_task_pt_regs(current);
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if (bpf_probe_read_kernel(current_regs, PT_REGS_SIZE, regs))
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return 0;
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if (bpf_probe_read_kernel(ctx_regs, PT_REGS_SIZE, ctx))
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return 0;
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/* Prove that uprobe was run */
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uprobe_res = 1;
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return 0;
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}
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char _license[] SEC("license") = "GPL";
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