163 lines
4.3 KiB
C
163 lines
4.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <linux/bpf.h>
|
|
#include <bpf/bpf_helpers.h>
|
|
#include <bpf/bpf_tracing.h>
|
|
#include <stdbool.h>
|
|
|
|
char _license[] SEC("license") = "GPL";
|
|
|
|
extern const void bpf_fentry_test1 __ksym;
|
|
extern const void bpf_fentry_test2 __ksym;
|
|
extern const void bpf_fentry_test3 __ksym;
|
|
extern const void bpf_fentry_test4 __ksym;
|
|
extern const void bpf_fentry_test5 __ksym;
|
|
extern const void bpf_fentry_test6 __ksym;
|
|
extern const void bpf_fentry_test7 __ksym;
|
|
extern const void bpf_fentry_test8 __ksym;
|
|
|
|
int pid = 0;
|
|
bool test_cookie = false;
|
|
|
|
__u64 kprobe_test1_result = 0;
|
|
__u64 kprobe_test2_result = 0;
|
|
__u64 kprobe_test3_result = 0;
|
|
__u64 kprobe_test4_result = 0;
|
|
__u64 kprobe_test5_result = 0;
|
|
__u64 kprobe_test6_result = 0;
|
|
__u64 kprobe_test7_result = 0;
|
|
__u64 kprobe_test8_result = 0;
|
|
|
|
__u64 kretprobe_test1_result = 0;
|
|
__u64 kretprobe_test2_result = 0;
|
|
__u64 kretprobe_test3_result = 0;
|
|
__u64 kretprobe_test4_result = 0;
|
|
__u64 kretprobe_test5_result = 0;
|
|
__u64 kretprobe_test6_result = 0;
|
|
__u64 kretprobe_test7_result = 0;
|
|
__u64 kretprobe_test8_result = 0;
|
|
|
|
static void kprobe_multi_check(void *ctx, bool is_return)
|
|
{
|
|
if (bpf_get_current_pid_tgid() >> 32 != pid)
|
|
return;
|
|
|
|
__u64 cookie = test_cookie ? bpf_get_attach_cookie(ctx) : 0;
|
|
__u64 addr = bpf_get_func_ip(ctx);
|
|
|
|
#define SET(__var, __addr, __cookie) ({ \
|
|
if (((const void *) addr == __addr) && \
|
|
(!test_cookie || (cookie == __cookie))) \
|
|
__var = 1; \
|
|
})
|
|
|
|
if (is_return) {
|
|
SET(kretprobe_test1_result, &bpf_fentry_test1, 8);
|
|
SET(kretprobe_test2_result, &bpf_fentry_test2, 2);
|
|
SET(kretprobe_test3_result, &bpf_fentry_test3, 7);
|
|
SET(kretprobe_test4_result, &bpf_fentry_test4, 6);
|
|
SET(kretprobe_test5_result, &bpf_fentry_test5, 5);
|
|
SET(kretprobe_test6_result, &bpf_fentry_test6, 4);
|
|
SET(kretprobe_test7_result, &bpf_fentry_test7, 3);
|
|
SET(kretprobe_test8_result, &bpf_fentry_test8, 1);
|
|
} else {
|
|
SET(kprobe_test1_result, &bpf_fentry_test1, 1);
|
|
SET(kprobe_test2_result, &bpf_fentry_test2, 7);
|
|
SET(kprobe_test3_result, &bpf_fentry_test3, 2);
|
|
SET(kprobe_test4_result, &bpf_fentry_test4, 3);
|
|
SET(kprobe_test5_result, &bpf_fentry_test5, 4);
|
|
SET(kprobe_test6_result, &bpf_fentry_test6, 5);
|
|
SET(kprobe_test7_result, &bpf_fentry_test7, 6);
|
|
SET(kprobe_test8_result, &bpf_fentry_test8, 8);
|
|
}
|
|
|
|
#undef SET
|
|
}
|
|
|
|
/*
|
|
* No tests in here, just to trigger 'bpf_fentry_test*'
|
|
* through tracing test_run
|
|
*/
|
|
SEC("fentry/bpf_modify_return_test")
|
|
int BPF_PROG(trigger)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
SEC("kprobe.multi/bpf_fentry_tes??")
|
|
int test_kprobe(struct pt_regs *ctx)
|
|
{
|
|
kprobe_multi_check(ctx, false);
|
|
return 0;
|
|
}
|
|
|
|
SEC("kretprobe.multi/bpf_fentry_test*")
|
|
int test_kretprobe(struct pt_regs *ctx)
|
|
{
|
|
kprobe_multi_check(ctx, true);
|
|
return 0;
|
|
}
|
|
|
|
SEC("kprobe.multi")
|
|
int test_kprobe_manual(struct pt_regs *ctx)
|
|
{
|
|
kprobe_multi_check(ctx, false);
|
|
return 0;
|
|
}
|
|
|
|
SEC("kretprobe.multi")
|
|
int test_kretprobe_manual(struct pt_regs *ctx)
|
|
{
|
|
kprobe_multi_check(ctx, true);
|
|
return 0;
|
|
}
|
|
|
|
extern const void bpf_testmod_fentry_test1 __ksym;
|
|
extern const void bpf_testmod_fentry_test2 __ksym;
|
|
extern const void bpf_testmod_fentry_test3 __ksym;
|
|
|
|
__u64 kprobe_testmod_test1_result = 0;
|
|
__u64 kprobe_testmod_test2_result = 0;
|
|
__u64 kprobe_testmod_test3_result = 0;
|
|
|
|
__u64 kretprobe_testmod_test1_result = 0;
|
|
__u64 kretprobe_testmod_test2_result = 0;
|
|
__u64 kretprobe_testmod_test3_result = 0;
|
|
|
|
static void kprobe_multi_testmod_check(void *ctx, bool is_return)
|
|
{
|
|
if (bpf_get_current_pid_tgid() >> 32 != pid)
|
|
return;
|
|
|
|
__u64 addr = bpf_get_func_ip(ctx);
|
|
|
|
if (is_return) {
|
|
if ((const void *) addr == &bpf_testmod_fentry_test1)
|
|
kretprobe_testmod_test1_result = 1;
|
|
if ((const void *) addr == &bpf_testmod_fentry_test2)
|
|
kretprobe_testmod_test2_result = 1;
|
|
if ((const void *) addr == &bpf_testmod_fentry_test3)
|
|
kretprobe_testmod_test3_result = 1;
|
|
} else {
|
|
if ((const void *) addr == &bpf_testmod_fentry_test1)
|
|
kprobe_testmod_test1_result = 1;
|
|
if ((const void *) addr == &bpf_testmod_fentry_test2)
|
|
kprobe_testmod_test2_result = 1;
|
|
if ((const void *) addr == &bpf_testmod_fentry_test3)
|
|
kprobe_testmod_test3_result = 1;
|
|
}
|
|
}
|
|
|
|
SEC("kprobe.multi")
|
|
int test_kprobe_testmod(struct pt_regs *ctx)
|
|
{
|
|
kprobe_multi_testmod_check(ctx, false);
|
|
return 0;
|
|
}
|
|
|
|
SEC("kretprobe.multi")
|
|
int test_kretprobe_testmod(struct pt_regs *ctx)
|
|
{
|
|
kprobe_multi_testmod_check(ctx, true);
|
|
return 0;
|
|
}
|