118 lines
2.3 KiB
C
118 lines
2.3 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2022, Oracle and/or its affiliates. */
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#include "vmlinux.h"
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#include <bpf/bpf_core_read.h>
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_tracing.h>
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#include "bpf_misc.h"
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int uprobe_byname_parm1 = 0;
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int uprobe_byname_ran = 0;
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int uretprobe_byname_rc = 0;
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int uretprobe_byname_ret = 0;
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int uretprobe_byname_ran = 0;
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u64 uprobe_byname2_parm1 = 0;
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int uprobe_byname2_ran = 0;
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u64 uretprobe_byname2_rc = 0;
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int uretprobe_byname2_ran = 0;
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int test_pid;
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int a[8];
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/* This program cannot auto-attach, but that should not stop other
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* programs from attaching.
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*/
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SEC("uprobe")
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int handle_uprobe_noautoattach(struct pt_regs *ctx)
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{
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return 0;
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}
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SEC("uprobe//proc/self/exe:autoattach_trigger_func")
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int BPF_UPROBE(handle_uprobe_byname
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, int arg1
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, int arg2
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, int arg3
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#if FUNC_REG_ARG_CNT > 3
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, int arg4
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#endif
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#if FUNC_REG_ARG_CNT > 4
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, int arg5
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#endif
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#if FUNC_REG_ARG_CNT > 5
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, int arg6
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#endif
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#if FUNC_REG_ARG_CNT > 6
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, int arg7
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#endif
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#if FUNC_REG_ARG_CNT > 7
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, int arg8
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#endif
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)
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{
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uprobe_byname_parm1 = PT_REGS_PARM1_CORE(ctx);
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uprobe_byname_ran = 1;
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a[0] = arg1;
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a[1] = arg2;
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a[2] = arg3;
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#if FUNC_REG_ARG_CNT > 3
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a[3] = arg4;
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#endif
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#if FUNC_REG_ARG_CNT > 4
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a[4] = arg5;
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#endif
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#if FUNC_REG_ARG_CNT > 5
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a[5] = arg6;
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#endif
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#if FUNC_REG_ARG_CNT > 6
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a[6] = arg7;
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#endif
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#if FUNC_REG_ARG_CNT > 7
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a[7] = arg8;
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#endif
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return 0;
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}
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SEC("uretprobe//proc/self/exe:autoattach_trigger_func")
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int BPF_URETPROBE(handle_uretprobe_byname, int ret)
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{
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uretprobe_byname_rc = PT_REGS_RC_CORE(ctx);
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uretprobe_byname_ret = ret;
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uretprobe_byname_ran = 2;
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return 0;
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}
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SEC("uprobe/libc.so.6:fopen")
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int BPF_UPROBE(handle_uprobe_byname2, const char *pathname, const char *mode)
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{
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int pid = bpf_get_current_pid_tgid() >> 32;
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/* ignore irrelevant invocations */
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if (test_pid != pid)
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return 0;
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uprobe_byname2_parm1 = (u64)(long)pathname;
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uprobe_byname2_ran = 3;
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return 0;
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}
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SEC("uretprobe/libc.so.6:fopen")
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int BPF_URETPROBE(handle_uretprobe_byname2, void *ret)
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{
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int pid = bpf_get_current_pid_tgid() >> 32;
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/* ignore irrelevant invocations */
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if (test_pid != pid)
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return 0;
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uretprobe_byname2_rc = (u64)(long)ret;
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uretprobe_byname2_ran = 4;
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return 0;
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}
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char _license[] SEC("license") = "GPL";
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