576d47bb1a
This test retrieves the uprobe's pt_regs in two different ways and compares the contents in an arch-agnostic way. Signed-off-by: Daniel Xu <dxu@dxuuu.xyz> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/5581eb8800f6625ec8813fe21e9dce1fbdef4937.1629772842.git.dxu@dxuuu.xyz
30 lines
655 B
C
30 lines
655 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/ptrace.h>
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#include <linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_tracing.h>
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struct pt_regs current_regs = {};
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struct pt_regs ctx_regs = {};
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int uprobe_res = 0;
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SEC("uprobe/trigger_func")
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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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__builtin_memcpy(¤t_regs, regs, sizeof(*regs));
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__builtin_memcpy(&ctx_regs, ctx, sizeof(*ctx));
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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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